Technical field The present invention belongs to the field of polyurethane synthetic material technology, specifically relates to a kind of shoe leather polyurethane surface resin and preparation method thereof. Background Existing synthetic leather or imitation leather include PU (polyurethane) leather and PVC, PU leather due to its performance is getting closer and closer to natural leather, and good physical and mechanical properties, so that it in the footwear industry to obtain a wide range of applications, with aesthetics, wearing comfort and hygiene and other advantages. However, the existing sneakers still have the disadvantages of poor breathability and poor water absorption, and long-term wearing of feet will feel uncomfortable, wet, burning feet, if it is sweaty feet, it may also lead to serious diseases. The poor breathability and water absorption of polyurethane as its raw materials are the direct cause of the poor properties of synthetic leather. Contents of the Invention Purpose of the Invention:In view of the deficiencies present in the prior art, the object of the present invention is to provide a polyurethane surface resin for shoe leather, so that it has good breathability, good water absorption and other characteristics. Another object of the present invention is to provide a method for preparing the polyurethane surface resin for shoe leather. Technical solutions:In order to achieve the above-described object of invention, the technical solution employed in the present invention is: A kind of polyurethane surf

Technical field The present invention belongs to the technical field of chemical products and preparation methods thereof, in particular to a polyurethane resin substrate for waterproof and moisture-permeable clothing leather, and also relates to the preparation method and application of the polyurethane resin substrate. Background With the improvement of people's living standards, people's requirements for clothing fabrics are getting higher and higher, especially in rainy days, winter or outdoor sports, not only require the clothes worn to have waterproof and warm effects, but also require good breathability of clothing, so that the hot air with sweat stains inside the clothing with higher temperatures is discharged in time to avoid poor wearing comfort. Direct-coated polyurethane waterproof and moisture-permeable clothing leather is a kind of fabric with good waterproofness and good air permeability, and the fabric adopts the direct coating of polyurethane using the fabric;Because the coating covers the fiber pores of the fabric, the raindrops will not pass through the fabric, so that the fabric has the function of waterproof and moisture permeable;At the same time, because the polyurethane coating components contain hydrophilic components, the sweat of the human body can be discharged in the form of steam, and the hydrophilic components in the polyurethane coating are transmitted to the outside in the form of adsorption - desorption - adsorption, so as to achieve the function of moisture permeability. Howeve

The environmental protection issues arising from the decommissioning of wind turbine blades have been aroused at home and abroad in recent years. Most of the world still choose to dispose of decommissioned wind power blades in the cheapest way of burying and incinerating them, but these two most convenient recycling methods are not only The cost is high, and many kinds of pollution will be produced, which will overwhelm the global environment. Is it possible to recycle the composite materials in these products in a low carbon economical way? If there is a new composite material with new recycling technology, when it needs to be scrapped, just add lysate to directly recycle resin and fiber, will it change the traditional rules? EzCiclo, CleaVER Shangwei Company innovatively launched two new products, "EzCiclo" and "CleaVER", and proposed future solutions, which can not only recycle wind power blades, but also reuse them. Shangwei "EzCiclo" is a kind of epoxy resin that can be recycled and reused. It uses "EzCiclo" made of glass fiber reinforced plastic (FRP, fiber-reinforced plastic) and carbon fiber composite materials to make wind power The blades can be recycled and degraded when they reach the end of their service life. Through the "CleaVER" technology, the "garbage" that would have been waste is transformed into recycled fibers and oligomers, which can be reused after sorting and made into glass fiber reinforced plastic ( GFRP) and carbon fiber composite (CFRP) raw materials, is a recyclable system. Going to the era of zero carbon The recycling methods of composite materials can be divided into three types, thermal decomposition method, microwave decomposition method and chemical depolymerization recycling, but each has its own disadvantages; Shangwei's "EzCiclo" and "CleaVER" systems are not only recyclable Fiber and resin can also be recycled, and the process will not

Technical field The present invention belongs to the technical field of chemical products and preparation methods thereof, in particular to a dry embossed color-changing resin, and also relates to the preparation method and application of the dry-embossed color-changing resin. Background Trademark leather, also known as compression PU, after being subjected to external pressure, the color change occurs at the surface of the force, and the color of the pattern after hot pressing is darker than the original base color, which has obvious differences, enhances the visual effect, and beautifies the product appearance.It can be used to emboss brand LOGO, text, pattern, etc., mainly used for high-end notebooks, notepads, trademark production, universal manuals, award certificates, business card books, business card bags, check holders, key bags, silver bags, passport bags, manager bags, leather goods gifts, etc. Existing trademark leather is usually prepared by wet process, usually through wet coating, water solidification, washing, drying and other processes to make semi-finished products, and then through embossing or surface treatment and other processes to produce. If the surface needs a specific pattern, dry veneer is also needed, and after the veneer is done, the embossing color change effect will be much worse. Wet preparation of trademark leather production line length, many art control points, the need for more online workers, so the production speed is slow, low efficiency, high cost. Contents of the Invention Purpose of the Invention :In order to overcome the above

New breakthroughs have been made in the development of polyurethane materials that are closely related to life. "The flame-retardant and environmentally friendly high-performance polyurethane material we developed has broken the monopoly of foreign well-known brands in environmental protection, flame-retardant, and high-end polyurethane materials." On March 10, Zhao Xiuwen, deputy chief engineer of Liming Chemical Research and Design Institute Co., Ltd., said. Polyurethane-related experts believe that the flame-retardant and environmentally-friendly high-performance polyurethane material developed by the company has excellent flame-retardant and environmental performance, which has driven technological progress in the industry, promoted my country's polyurethane industry to move towards mid-to-high end, and helped my country's automobile quality improvement and aviation industry development of. "The polyurethane flexible foam developed by Liming Institute can be applied to seats, cushions and headrests of airplanes, trains, cars and other means of transportation due to its excellent characteristics. We have become the supplier of polyurethane for Yutong Bus T7 car seats and other interior parts. The sole supplier of raw materials, serving large-scale events such as the National Two Sessions and the Boao Forum for Asia." Zhao Xiuwen said. According to reports, in order to realize the transformation of Yutong Bus T7 from ordinary interior decoration to environmentally friendly high-quality interior decoration, the company's polyurethane material development project combined a substance with a cavity structure. The hydrophobic cavity can envelope organic molecules and inhibit benzene. The volatilization of aldehydes and aldehydes reduced the total volatile organic compounds (TVOC) by 47%. They also combined the formulation technology of the low-odor quick-response system to make the product's foam odor level better than

Following the three mega projects of West-to-East Gas Transmission, West-to-East Power Transmission and South-to-North Water Diversion, China's fourth cross-regional resource allocation mega-project, the "East-West Calculation" project, has recently been officially landed. The full launch of the project marks the "fast forward button" for the construction of digital China and network power. For the petroleum and chemical industry, "counting from east to west" will also promote the digitalization and high-quality development of the industry. First, "counting from east to west" will provide a solid foundation for the digital transformation of chemical enterprises. In the era of digital economy, chemical process simulation and simulation, molecular simulation design and other processes require a large number of complex calculations, and chemical enterprises have higher and higher demand for "cloud, data use, and intelligence", especially the demand for computing power. The promotion of the "East Data and West Computing" project will further improve and optimize computing power, help reduce the cost of enterprise cloud use, and accelerate the application and landing of new technologies such as industrial Internet and artificial intelligence, which will undoubtedly provide a more solid foundation for the innovation and development and digital transformation of chemical enterprises. Second, "counting from east to west" will bring a "butterfly effect" to modern coal chemical industry. At present, most of China's data centers are distributed in the east, and with the increasing shortage of land, energy and other resources in these areas, large-scale development is difficult to sustain. The western part of China has abundant resources and has the potential to develop data centers and undertake the demand for computing power in the east. This is also the background of China's "East Data and West Calculation" pr

Brunswick, a company that develops, manufactures and markets a wide range of products for the marine industry, is expanding its collaboration with specialty materials company Arkema, to develop a fully recyclable fiberglass vessel that integrates Arkema's Elium liquid thermoplastic resin on all of the ship's composite components, core materials and adhesives. The project, part of Brunswick's enterprise-wide sustainability program, is expected to result in hull and structural components being fully recycled at the end of their useful life and put back into the production process, reducing the amount of single-use materials and the procurement of virgin raw materials. The first composite boat prototype is expected to be on display at the 2022 Fort Lauderdale Boat Show Oct. 26-30 and will be developed in conjunction with fiberglass boat manufacturer Boston Whaler, using the brand's construction to validate the technology. "We are delighted to expand our partnership with Arkema, which marks an exciting milestone in our sustainability journey." Kris Neff, President of Boston Whaler, said, "By combining next-generation materials with the safety and durability of the Boston Whaler brand, we are ensuring that we continue to meet the diverse and changing needs of boaters while reducing our environmental footprint. " Arkema Elium resins are particularly suitable for the marine industry and the production of composite waterships; In addition to being fully recyclable, it is also suitable for resin infusion processes for large components, with low viscosity, long reactivity and low exothermic reaction. "Elium resins are our solution for a new era of sustainable composites," added Nicolas Valloir, Business Manager at Arkema, "and through our partnership with Brunswick and Boston Whaler, we are helping to shape a more sustainable future and circular economy for the marine industry." This is fully in line with Arkema'

Technical field The present invention relates to a kind of polyurethane resin fabric for labor protection shoe leather and a preparation method thereof, belonging to the polyurethane resin fabric technology field. Background Labor protection shoes are a kind of shoes that have a safety protection effect on the foot. In the process of employee work, the working environment will have certain dangers and hazards, especially in the production workshop. Artificial leather for labor protection shoes generally has the functions of anti-smashing, anti-puncture, wear resistance and so on. China according to the protective performance of shoes to carry out the classification of labor protection shoes, mainly anti-static shoes and conductive shoes, insulated shoes, anti-smashing shoes, anti-acid and alkali shoes, anti-oil shoes, anti-slip shoes, anti-puncture shoes, cold shoes, waterproof shoes and other types. Labor protection shoes will be selected according to different working environments. At present, there are more waterproof and permeable polyurethane resins used in labor protection shoe leather on the market, but most of them have low permeability, poor wear resistance and poor hydrolysis resistance.Especially in the hot summer, it is easy to stuffy feet, sweaty feet, and feel very uncomfortable. Because the shoe leather used for labor protection shoes is generally relatively high in thickness, the permeability is generally low; In order to improve the permeability, the thickness of the polyurethane resin coating used for labor protection shoe leather is deliberately reduced, which will lead to wear resistance difference; Waterproof and permeable polyurethane resin, itself has hydrophilicity, so the general

What is the pu resin like The pu resin is a kind of various product forms of the multi-purpose synthetic resin, its product forms include foam plastic, elastomer, coatings, adhesives, fiber, synthetic leather, waterproof materials and paving materials, etc., is a more and more widely used synthetic resin insulation material. Its excellent performance is widely used in many fields of the national economy. Product application fields involve light industry, chemical industry, electronics, textile, medical treatment, construction, building materials, automobile, national defense, aerospace, aviation, etc. The Development History of PU Leather In China, it is customary to call PU resin PU synthetic leather (Jane PU leather); the artificial leather made from PU resin and non-woven fabric is called PU synthetic leather (or synthetic leather). For PU synthetic leather, PU synthetic leather, the industry has not been accurately named, but there are People used to the above three kinds of leather collectiv

Recycled materials to create luxury interiors Jaguar Land Rover accelerates the pace of "zero emissions" Recently, Jaguar Land Rover announced that it has reached a cooperation with ECONYL®, a leading brand of recycled nylon, to jointly develop high-quality environmentally friendly automotive interiors. The raw materials of the interiors will be composed of recycled marine plastics and landfills. This cooperation is an important part of Jaguar Land Rover`s "Destination Zero" corporate vision. Through continuous innovation, Jaguar Land Rover will create a more efficient, safe and green future travel life for consumers around the world. The ECONYL® recycled nylon used in this cooperation was developed and produced by the Italian company Aquafil, which holds this patent, and has been adopted by many high-end fashion, sports and luxury watch brands around the world. Compared with petroleum-based nylon production, ECONYL®, an environmentally friendly material, can reduce the impact of global warming by 90%. In the production process, every 10,000 tons of raw materials produced can not only save 70,000 barrels of crude oil, but also reduce 65,100 tons of carbon dioxide emissions. This environmentally friendly material will be used to manufacture floor mats for Jaguar Land Rover models, and will provide consumers with a higher quality and durable experience. This cooperation and breakthrough will help Jaguar Land Rover move further towards a circular economy, and is also an important step in the "Destination Zero" enterprise vision of zero emissions, zero accidents and zero congestion. Adrian Iles, senior engineer of internal systems at Jaguar Land Rover, said: [Our designers and engineers have always been committed to using the latest technology to develop next-generation sustainable materials, which will also be used in future Jaguar Land Rover models. [Destination Zero" One of the core of the corporate vision is to minimize waste,

Silicate-1 (TS-1) was developed nearly 40 years ago and has been successfully used as a catalyst to convert propylene to propylene oxide. This is an important commodity chemical, such as polyurethane. plastic. Now, a research team from ETH Zurich, the University of Cologne, Fritz-Haber-Institute and BASF has revealed surprisingly actual reaction mechanisms. Propylene oxide is an important commodity in the chemical industry, used in the production of plastics, antifreeze and hydraulic oil. The annual production of propylene oxide exceeds 11 million tons, of which more than 1 million tons are generated by oxidation with hydrogen peroxide (H2O2). This chemical reaction is catalyzed by titanium silicate-1 (TS-1). Titanium silicate-1 is a porous crystalline material composed of silicon dioxide and contains a small amount of titanium atoms (about 1 to 4 titanium atoms per 100 silicon atoms). Water is the only by-product. Although this catalytic process has been successfully applied since TS-1 was developed nearly 40 years ago, the specific catalytic mechanism is still unclear. However, the consensus of the chemical research community is that the active site in TS-1 must be an isolated titanium atom, which provides the basis for the unique reactivity of the catalyst. A research team from ETH Zurich, the University of Cologne, the Fritz-Haber-Institute in Berlin, and BASF questioned this hypothesis. In a study currently published in the journal Nature, researchers can show that in the catalytic process, two titanium atoms activate H2O2, which indicates that the titanium atoms are actually not isolated, but have a synergistic effect. According to the 17O solid-state nuclear magnetic resonance spectrum, the researchers showed that in the oxidation process with H2O2, it will form a peroxide intermediate with two titanium atoms. Through computational modeling, the author further showed that these dinuclear sites can indeed promote th

Co-sponsored by China Synthetic Resin Supply and Marketing Association, China Automobile Industry Association, China Polyurethane Industry Association, China Fluorosilicon Organic Material Industry Association, and hosted by China Automotive Lightweight Non-metallic Materials Industry Alliance, "New Material Application Development Conference and Automotive Lightweight Non-metallic Material Industry Alliance Seminar" was held in Qingdao on November 21, 2019 Han Baole, deputy secretary-general of the China Polyurethane Association,`s report on the [Application of Polyurethane in Automobiles" describes the wide application of polyurethane materials in the automobile industry, providing automobiles with high efficiency, safety, comfort, energy saving and environmental protection; and expounding the future development Trend: Fiber-reinforced polyurethane composites, TPU and TPU composites, water-based and solvent-free polyurethane adhesives and coatings are the future development trends. Zhu Yi, senior director of the Materials Research Institute of FAW Group Corporation, made "Application of Lightweight Automotive Powertrain and Pipeline (Application of Nylon and Thermoplastic Elastomer in Engine, Battery and Pipeline)". She pointed out that whether it is traditional passenger cars, heavy commercial vehicles, new energy vehicles, and smart connected vehicles, all have different demands for lightweight. The current automobile lightweight should be integrated in design, manufacturing, material technology and other aspects through optimization design, functional configuration optimization, improvement of structural strength, material technology and other aspects. The main approaches include: optimized design, functional configuration optimization, improvement of structural strength, material technology, etc. Among them, the material technology includes light alloys such as aluminum-magnesium-titanium, high-stre

It breaks the shortcomings of traditional rubber and EVA soles. It has the advantages of lightweight and environmentally friendly recycling. It can also use 3D printing to achieve customized and personalized design of shoes, helping the PU shoe industry to enhance the competitiveness of the industry. It is the PU midsole application that Zhejiang Huafeng New Materials Co., Ltd. under Huafeng Group has been researching and developing with great concentration in recent years. Recently, Huafeng New Materials brought PU (polyurethane) midsole application innovation trend program to the 2019 Fourth International Footwear Innovation Summit (F.I.S), which has attracted the attention of many footwear brands from all over the world. At the moment, many footwear brands such as New Balance, Anta, and Peak are offering Huafeng an olive branch. It is reported that the F.I.S summit is a key channel connecting footwear brands and manufacturers, and fills the gap between different industries. Overcome PU weight The sole is "light as a feather" According to reports, Huafeng New Materials combines PU materials with PU midsole lightweight, 3D printing, and environmentally friendly recycling technology, and proposes a development plan for the innovative trend of PU midsole applications, which will make up for the gap in the development of the downstream PU shoe industry. Two years later, PU midsole applications will achieve preliminary mass production. "Rubber and EVA are commonly used in the global shoe industry, while PU only accounts for 9% of the total global production of shoes, which shows that the market share is extremely low." Huafeng New Materials Marketing Manager Xu Xu said, the reason is PU material It is heavier than EVA, which reduces the comfort level. This shortcoming makes PU unable to make a big splash in the footwear market. However, PU has hydrolysis properties, and its enviro

The film forming mechanism of water-based two-component polyurethane is different from thermoplastic polymer solution, and also different from thermoplastic polymer dispersion and thermosetting polymer solution. From the composition point of view, it is related to both the particle coalescence mechanism of the thermoplastic polymer dispersion and the film formation mechanism of the thermosetting polymer solution's crosslinking reaction. During the film forming process: Volatilization of volatile matter (solvent, water); Co-coagulation of polyol and polyisocyanate particles; The reaction of polyisocyanates and water; The reaction of polyols and polyisocyanates. Its film formation is composed of a series of kinetic processes, and its occurrence sequence and development process have an important influence on the quality and performance of the film. At the beginning of the mixing of the two components, the coalescence of polymer particles and the chemical reaction of isocyanate are important processes that affect the system. In addition to the above factors that continue to play an important role in the film formation process, the evaporation of water and solvent also becomes very important. Once the isocyanate component is mixed with the hydroxyl component, it is immediately dispersed. During the mixing stage, the polymer particles coalesce to a small degree. Many studies have confirmed that At the beginning of the mixing of the two components, the coalescence of polymer particles and the chemical reaction of isocyanate are important processes that affect the system. In addition to the above factors that continue to play an important role in the film formation process, the evaporation of water and solvent also becomes very important. Once the isocyanate component is mixed with the hydroxyl component, it is immediately dispersed. During

Ashland is increasing prices on 1,4-Butanediol (BDO) and several derivative products as indicated below: PU resin, also known as polyurethane resin, is widely used in the production of synthetic leather. Synthetic leather, also referred to as faux leather or artificial leather, is a man-made fabric that imitates the appearance and feel of genuine leather. PU resin is a key component in the manufacturing process of synthetic leather, as it provides the material with its durability, flexibility, and water resistance. The process of producing synthetic leather involves coating a fabric substrate, such as polyester or nylon, with a layer of PU resin. This resin is typically applied in liquid form and then undergoes a curing process to solidify and bond with the fabric. The resulting material has a leather-like texture and appearance. PU resin offers several advantages for synthetic leather production. It has excellent abr

Recently, researchers at the University of California, Berkeley invented a new chemical process that can recycle waste plastic bags (mainly polyethylene PE) and convert them into more valuable adhesives, realizing the upgrade of polyethylene Recycling. According to reports, the researchers used a catalyst based on ruthenium (gold balls in the middle) to add specific chemical groups (in this case, OH (red)) to the polyethylene polymer chain to form an oxidized poly Vinyl. It can be firmly attached to the metal and retains the unique plastic characteristics of polyethylene. Researchers have made 11 attempts and it is difficult to separate water-based latex paint from Ox-LDPE (Ox-LDPE). Previously, latex paint was basically difficult to adhere to ordinary plastics. "Polyethylene chains usually have 2,000 to 10,000 carbon atoms, and each carbon atom has two hydrogen atoms-in fact, it is an ocean of CH2 groups called methylene groups. We consulted the literature , Looking for active catalysts that we can find for functionalization of methylene positions." The researchers said. Considering that solid recycled plastics need to be melted, this requires that the catalyst used for polyethylene recycling and modification can work in high temperature and non-polar solvents in order to be mixed with non-polar polyethylene. The researchers studied a ruthenium-based catalyst (polyfluororuthenium porphyrin) that can meet these requirements and can add OH groups to the polymer chain without breaking the polymer chain by the highly active hydroxyl groups. The researchers found that catalysis chemically changes less than 10% of the polymer, but it greatly enhances its ability to adhere to other surfaces. The improvement of polyethylene`s adhesion has potential for application-for example, artificial hip and knee implants usually combine polyethylene with metal parts, and the improvement of polyethylene`s adhesion can make it better G

Polyurethane is a polymer formed by the reaction of isocyanate and polyol. These polymers have a wide range of hardness, hardness and density, and are usually used to manufacture high-resilience foam seats, rigid foam insulation boards, foam seats and gaskets, elastic wheels and tires, high-performance adhesives and surface coatings. And sealant. In terms of quantity, polyurethane foam is the most important as a soft or rigid foam, and the furniture market is the most important area. The global annual demand for furniture cushions, carpet cushions and mattresses exceeds 5 million tons. In addition, due to the increasing use of lightweight and insulating materials in other fields such as construction, electronics, automotive and packaging materials, the global demand for polyurethane materials has continued to grow in recent years. Key polyurethane waste Because many harmful chemicals such as isocyanate, hydrocyanic acid and dioxins are released when these substances are incinerated, the disposal of polyurethane waste has become a problem. Polyurethane products deposited in landfills can also decompose into harmful substances that are harmful to the environment. In addition, since most polyurethanes are thermosetting polymers and will not melt when heated, it is currently difficult to recycle polyurethane. More and more people are focusing on more sustainable production methods, so people have been researching on research strategies, such as mechanically recycling polymers (that is, turning old mattress foam into insulating materials) or chemical recycling to achieve polyurethane Of recycling. With this in mind, the University of Illinois team led by Professor Steven Zimmerman developed a method to decompose polyurethane waste and convert it into other useful products. Change the structure of polyols Graduate student Ephraim Morado

In the global 3D printing industry, we occasionally encounter some start-up companies whose technology may seem trivial, but the potential is huge. This not only requires a good idea, but more importantly, to find the real pain points. This is not as easy as it sounds. More importantly, the company must have the technology to solve these problems. Chromatic 3D Materials' work on thermoset materials, especially polyurethane extrusion, is a good example. Being able to use one of the most commonly used materials in the world for 3D printing proficiently and at low cost will bring huge market opportunities. The most commendable of the C3DM method is that there are many extrusion 3D printer manufacturers around the world, and everyone can use this method. The company's approach is based on materials and software and has nothing to do with hardware. The company's 3D printed polyurethane is a series of rubber elastomers with high performance and high resilience. From automobiles to consumer products, there are almost unlimited potential applications. The relevant person will explain: "To launch a new technology in the materials industry, you must prove its potential worth hundreds of millions of pounds. The materials industry supply chain is very long. There are many steps to go through before the final product is obtained." This is also the reason why she was initially attracted to 3D printing. She explained: "I am interested in bringing the choice of materials closer to the end user, which really changes the motivation required to provide innovative materials to the market. I think 3D printing will Bring to the world innovative materials that we have not seen before, and these materials have higher functionality." Where is the thermoset material? When observing the materials suitable for 3D printing more closely, relevant personnel noticed that the scope of materials is indeed limited. And the biggest missing pa

Polyurethane is very versatile. This material formed by the reaction of polyols and diisocyanates can be made into skateboard wheels, rigid structures of automobiles, memory foams for mattresses, and insulation materials for refrigerators and buildings. However, the properties of polyurethane-the properties of tightly bound molecules and usually irreversibly combined with cross-linked materials, and remeltable thermoplastics such as polyethylene terephthalate (PET) or polypropylene (PP) In comparison, its recycling is a challenge. Plastic manufacturers are trying to use more environmentally friendly raw materials, such as polyols extracted from soybean oil, to improve the sustainability of polyurethane. Huntsman has adopted a similar strategy, but in its case, it is making polyurethane more sustainable in a way that helps solve the wider plastic waste problem: using polyols extracted from recycled plastic. . The company recently opened a factory in Taiwan to produce Terol aromatic polyester polyols from post-consumer polyester bottles. This 22,000-ton/year plant is its second plant to use this technology. The company said that since then, the company's consumption in Houston is equivalent to 5 billion PET bottles. In these factories, Huntsman starts with a process similar to glycolysis, decomposing PET into short-chain oligomers. This is in sharp contrast to other companies, which depolymerize PET to the structural chemicals dimethyl terephthalate and ethylene glycol, and then condense it into PET or other polyesters. Huntsman has redesigned oligomers to build the required molecular weight, functionalized polymer backbone, and combine the resulting aromatic polyester polyols with other polyols to obtain the required properties for various applications. Relevant personnel stated that the final polyol that the company is producing has 30% to 40% recyclable content. He said Huntsman can increase its content to

The US research institute Hexa Reports released a new research report showing that by 2022, the global water-based coating additives market is expected to reach 4.11 billion U.S. dollars, and the output will reach 801,000 tons, with a compound annual growth rate of 5.5%. Due to people's preference for low-toxicity, low-voc coatings and the increasing requirements of formulation technology for multifunctional additives, it is expected that the water-based coating additives market will develop well in the future. In the very mature North America and European area of architectural coatings, water-based coating consumption has accounted for 90%, replacing most of the solvent-based coatings. Data show that in 2014, rheology modifiers accounted for 40% of the total water-based coating additives market, becoming the main additives. Rheology modifiers can reduce the surface tension of the formulation system, improve the color and film quality, and improve the wet abrasion resistance, etc., and help to control various rheological properties, such as painting performance, storage stability, and anti-sagging Performance, film-forming properties, etc. The study pointed out that the growth rate of this species was the fastest during 2015-2022, reaching more than 6%. In addition, the research report also conducted a detailed analysis of other additives. For example, the global wetting and dispersing agent market scale was over 150,000 tons in 2014 and is expected to develop well in the next few years. Research has pointed out that the requirements for anti-flocculation technology for dispersed particles in architectural coatings and industrial wood coatings are getting higher and higher, which has promoted the development of wetting and dispersing agents. Hydroxyethyl cellulose (HEC) is the most commonly used rheology modifier in water-based coating formulations. Data show that in 2014 this variety accounted for 28% of t

On the afternoon of August 12th, Ethiopian Ambassador to China Tesome Toga, Minister Afon, First Secretary Simon, and Commercial Commissioner Huang Zhuo visited China Leather and Shoe Research Institute, Duan Limin, Dean of China Leather Shoe Research Institute, Party Secretary Chen Lei, Vice President Zhang Jiankang, heads of the Technology R&D Center, Information Industry Center, Training Center, and relevant leaders of China Light Inspection and Certification Co., Ltd. participated in the visit. The ambassadors visited the China Light Industry Inspection and Testing Center and the Laboratory of the Science and Technology Research and Development Center of the Institute of Leather Industry. The technicians of the China Leather and Footwear Research Institute explained related technologies and testing methods such as leather, shoemaking, and luggage. Afterwards, the two parties sat in the conference room for talks. Duan Limin extended a warm welcome to the visit of the ambassador, and introduced the overall situation of the China Leather and Footwear Research Institute to the ambassador and his party, especially the China Leather and Footwear Research Institute in recent years in foreign cooperation, green leather technology, waste recycling, A detailed report was made on the construction of the tannery park. Teshome Toga expressed his gratitude to the China Leather and Footwear Research Institute for its warm reception. He said that Ethiopia has rich raw material leather resources and great potential in the leather industry. He hopes to continue to deepen the cooperation with China Leather and Footwear Research Institute on the basis of existing cooperation. Technical cooperation, comprehensively enhance Ethiopia's tannery technical capabilities, and continuously promote the development of the local tannery industry, making the cooperation between the two parties closer. The two parties conducted exchanges and discussions on technology int

TPU is synthesized from isocyanate and polyol. The isocyanate gives the strength of the TPU material, and the polyol gives the flexibility of the TPU material. With different formulations of raw materials, the hardness of TPU can be adjusted, and TPU has excellent wear resistance, which is very suitable for shoemaking. Outsole: The outermost layer of sole that touches the ground is called the outsole. The most important requirements for the outsole are non-slip and wear-resistant. Traditional shoe outsoles are made of rubber or EVA. Due to the wear resistance of TPU, it has gradually taken a place in the outsole. Air cushion: Sports shoes pursue high resilience and high shock absorption effect. The air cushion is located between the upper part of the shoe sole and the lower part of the shoe sole. It is a hollow air storage cavity that can store and press out air. The air storage cavity and the air inlet and outlet channels arranged on the shoe form a ventilation device. Air-cushioned shoes with air cushions are very light to wear and can slow down sports injuries. Air cushion shoes were first invented by Nike, and today, there are many types of air cushions. From the material point of view, PU, PVC and TPU are most commonly used. The mechanical strength and hardness of TPU can be flexibly adjusted to adapt to the requirements of air cushions. In addition, TPU can be very transparent, increasing the aesthetics of air cushions and shoes. Upper: Usually the upper material is multi-layer composite. TPU hot melt adhesive film is widely used for composite bonding between layers. The hot melt adhesive film is a thin layer of TPU film, which is sandwiched between two layers of fabrics, heated with a hot laminator, the TPU is melted and then solidified, and the fabrics are firmly bonded together. TPU hot melt adhesive for shoe uppers is simple to operate and easy to construct, which greatly improves the production e

my country has become the world's largest plastic production and consumption country Zhu Wenwei, chairman of the China Plastics Processing Industry Association, said that plastics and their products have spread in all fields of national economy and social life in just a few decades, from industry to agriculture, from production to life, from scientific research to application, from materials to Terminals all play a huge and irreplaceable role. Zhu Wenwei previously said at the "Sustainable Development of Polymer Materials Engineering Technology Forum" that while serving economic and social development, the plastics industry has also achieved its own development. From the initial stage of the founding of New China, the annual output of plastics was more than 400 tons. By 2017, the annual output has exceeded 75 million tons. After the founding of New China, the cumulative output of plastic products has exceeded 1 billion tons. In 2018, enterprises above designated size in the plastic products industry across the country completed a cumulative output of 60,421,500 tons, a year-on-year increase of 1.10%, and has become the world's largest country in plastic production and consumption. In the industry, 15,571 enterprises above designated size completed main business income of RMB 1,806.175 billion, an increase of 5.04% year-on-year, accounting for 2% of the national industry; realized profits of RMB 95.04 billion, an increase of 3.28% year-on-year, accounting for 2% of the national industry; The total export value of the plastic products industry was US$69.421 billion, a year-on-year increase of 10.67%. While the industry is developing rapidly, the plastics industry is also working hard to implement the concept of ecological and environmental protection, and through practical actions to achieve the goal of sustainable development. 30 million tons of recycled waste plastics are used every year Zhu Wenwei i

On the morning of November 26th, the National Standards Promotion Meeting for the Series of Test Methods for Artificial Leather and Synthetic Leather was held in Taicang City, Jiangsu Province. The promotion meeting was hosted by China National Light Industry Council and co-organized by Asahikawa Chemical. Wang Xuhua, Director of the Comprehensive Business Department of the China National Light Industry Council, Zhang Lei, Director of the China Light Industry Standardization Institute, Wang Xiangdong, Secretary General of the National Plastics Standards Committee, Nie Bo, Secretary General of the National Food Direct Contact Materials and Products Standards Committee, Feng Limin, Section Chief of Taicang Market Supervision Administration, Professor Xu Bo from the Technical Committee of the National Plastics Standards Association and representatives of artificial leather and synthetic leather related enterprises such as Amway, Xiefu, Achilles, Asahikawa Chemical, etc. attended the meeting. Asahikawa Chemical, as a member of the national and industry standard formulation and revision working group and the co-organizer of this meeting, delivered a speech at the meeting and demonstrated the company's latest technological achievements to colleagues in the industry. At the meeting, Director Wang Xuhua introduced that the China National Light Industry Council attaches great importance to the implementation of national standards. The implementation of the national standards for the series of test methods for artificial leather and synthetic leather provides technical standards for industry product quality, and also provides standards for the industry to carry out related certifications. Technical requirements. At the same time, the artificial leather and synthetic leather industry is required to stri