🔬 At a molar fraction of 5% vinyl acetate, the mechanical properties of EVA (ethylene vinyl acetate copolymers) become very similar to those of soft PVC.EVA is flexible in its own right, which gives it a number of advantages, such as the disadvantage of avoiding the migration of plasticizers, which is the main reason for the gradual replacement of PVC.
💪 These copolymers have a higher modulus and better processing properties than typical elastomers and do not require vulcanization considerations. Polyvinyl alcohol can be obtained by hydrolysis of polyvinyl acetate. Poly(vinyl alcohol) is an atactic cubic polymer but does not disrupt the lattice structure due to the small hydroxyl groups. Therefore, ester bases that are not sufficiently hydrolyzed reduce crystallinity and the number of intermolecular hydrogen bonds.
💧 Highly hydrolyzed poly(vinyl acetate) (containing fewer unhydrolyzed ester groups) has a higher crystallinity. As the degree of hydrolysis increases, the molecules become easily crystallized. If these molecules are not sufficiently dispersed before dissolution, hydrogen bonding will cause them to associate with each other. In order to achieve hydrolysis levels above 98%, manufacturers need to operate at a low temperature of 96°C to ensure that the larger molecules have sufficient thermal energy to dissolve.
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EVOH (ethylene vinyl acetate copolymer) is a polymer with excellent gas barrier properties and is commonly used in food packaging, medical products, and protective materials for automotive and electronic products. Due to the high molar fraction of vinyl acetate, EVOH exhibits excellent gas barrier properties, especially for oxygen and nitrogen, and is therefore often used in food packaging to extend the shelf life of products.
The gas barrier properties of EVOH stem from its highly crystalline structure, which allows the molecular chains to be arranged more tightly, reducing the path of gas molecules through the material. In order to improve the properties of EVOH, different degrees of hydrolysis are often used to adjust the degree of crystallinity. The higher the degree of hydrolysis, the higher the crystallinity of EVOH and the consequent increase in barrier properties. Therefore, the degree of hydrolysis of EVOH must be strictly controlled during the production process to ensure that the material has ideal gas barrier properties. In China, EVOH products (EW-3201 and EW-3801) produced by Sinopec are highly recognized.
EVOH also offers significant advantages over other plastics in terms of chemical resistance, high temperature resistance and transparency. Its excellent processability allows it to be used directly in multilayer composites without the need for complex post-treatment operations during production, thus enhancing the functionality and economy of the final product.
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PVB PVB resin is widely used as an interlayer material in the production of safety glass. This type of glass boasts exceptional transparency and high impact resistance, making it ideal for applications in the aerospace and automotive sectors. Whether it’s for airplane windows or car windshields, PVB resin-based safety glass ensures both clarity and durability, providing an extra layer of protection in high-stakes environments. In the realm of protective coatings, PVB resin plays a crucial role in manufacturing anti-corrosion and anti-rust paints. These coatings are known for their strong adhesion, excellent water resistance, and ability to withstand harsh weather conditions. Additionally, PVB resin is used to create metal primers and cold-resistant paints, ensuring that structures and machinery remain intact and functional even in extreme environments. PVB resin is a key ingredient in the production of vibrant decorative films, which can serve as an alternative to traditional ceramic decals. These films are not only visually appealing but also highly durable. In the PVB resin industry, it is also used to create molding compounds that can replace metals like steel and lead. Furthermore, PVB resin-based adhesives are widely employed for bonding materials such as wood, ceramics, metals, plastics, leather, and laminated composites, showcasing its versatility. The textile industry benefits from PVB resin in the form of fabric treatment agents and yarn tubes, which enhance the quality and durability of textiles. In the food industry, PVB resin is used to produce non-toxic packaging materials, ensuring the safety and integrity of food products. Its non-toxic nature makes it an ideal choice for packaging sensitive items like tea and cigarettes, where odor retention is a concern. In the paper industry, PVB resin is utilized as a paper treatment agent, improving the strength and quality of paper products. Additionally, it is used to create anti-shrinkage agents, stiffening agents, and other waterproof materials, further expanding its utility in industrial applications. PVB resin’s solubility in alcohols and non-toxic nature make it a preferred choice in the printing industry. It is compatible with various printing techniques, including flexography, gravure, letterpress, screen printing, and heat transfer printing. Its ability to produce odor-free prints makes it suitable for packaging sensitive items like tea and cigarettes. Moreover, its cationic properties allow it to adhere strongly to glass surfaces, making it particularly effective for glass decoration through screen printing. From enhancing the safety of vehicles and aircraft to revolutionizing the printing and packaging industries, PVB resin has proven to be a material of immense value. Its adaptability, combined with its eco-friendly and non-toxic characteristics, ensures that it will continue to play a pivotal role in shaping the future of technology and industry. As research and innovation progress, we can only expect to see even more groundbreaking applications of this remarkable material. Website: www.elephchem.com Whatsapp: (+)86 13851435272 E-mail: admin@elephchem.com
In recent years, with the accelerated pace of urbanization in my country and the continuous growth of automobile sales, there has been a strong demand for PVB laminated glass. At the same time, with the development of technology, PVB Film Physical recycling is to put the discarded PVB through a series of physical treatment processes, such as separation, purification, cleaning, etc., and at the same time, add certain additives as required for reuse. This method can effectively utilize PVB materials and greatly reduce environmental pollution. For example, the PVB solid waste and scraps discarded in the market are recycled, and after sorting, cleaning, drying, and crushing processes, plasticizers, tougheners, three-salt stabilizers and other additives are added, and waterproof membranes for construction are produced through high-speed mixing, mastication, tableting and other processes. Through experimental research, it has been found that the waterproof membrane has good mechanical properties, convenient processing, and a wide operating temperature range, and has broad market prospects in the construction field. The chemical recycling method uses light, heat, radiation, and chemical reagents to degrade PVB polymer into low-molecular single or hydrocarbon substances. At the same time, the cracked raw materials can be reused. Common cracking methods include hydrolysis, alcoholysis, thermal cracking, hydrocracking, catalytic cracking, etc. However, the current technology of this deep chemical recovery method is not very mature, the technology cost is high, and the economic benefits are low. Currently, the most commonly used method is to process waste PVB to obtain pure polymer resins and additives. Supercritical separation technology is used to separate the additives and resin in colorless PVB. Energy recovery is the process of extracting energy from waste plastic, typically used as fuel or to generate steam to generate electricity. Because PVB polymer contains a large amount of hydrocarbons, it is flammable. Although the energy recovery method is one of the methods for recycling PVB waste, it is not commonly used due to its high cost. Website: www.elephchem.com Whatsapp: (+)86 13851435272 E-mail: admin@elephchem.com
Aluminum nitride (AlN) is a high-performance material with high thermal conductivity (320 W·m⁻¹·K⁻¹), excellent electrical insulation (>10¹⁴ Ω·cm), and strong mechanical properties. Its low dielectric constant (8.0 at 1 MHz) and minimal dielectric loss (tanδ = 10⁻⁴) make it ideal for electronics.
Key applications include:
Power device packaging
High thermal conductivity AlN ceramic substrates
Electrostatic chucks' material for semiconductor processing
Excellent insulation ceramic components ( ceramic heaters,ceramic nozzles)
AlN combines thermal management, electrical resistance, and durability for advanced industrial use.
AlN ceramics are sintered from AlN powder, and high-quality AlN powder is a prerequisite for achieving high-performance AlN ceramics. The preparation of AlN powder significantly impacts the sintering, forming, and thermal conductivity of the final product. Industrially, there are three main methods for producing AlN powder: direct nitridation, self-propagating high-temperature synthesis (SHS), and carbothermal reduction.
1. Principle of the Carbothermal Reduction Method
The carbothermal reduction method typically uses aluminum compounds (such as alumina or aluminum hydroxide) and excess elemental carbon or organic carbon as raw materials. These are reacted in a nitrogen (N₂) or ammonia (NH₃) atmosphere at high temperatures. The product is then decarburized in an oxidizing atmosphere at 500–700°C to obtain AlN powder. This method yields powder with low oxygen content, high purity, narrow particle size distribution, and regular particle morphology.
The reaction mechanism can be summarized as follows:
①Reduction of alumina: Carbon reduces alumina to form intermediate products such as Al(g) and Al₂O(g).
②Nitridation: Aluminum reacts with nitrogen to form AlN.
The reaction mechanism of carbothermal reduction can be categorized into gas-solid and solid-solid reactions. Experimental observations of aluminum vapor emission peaks support the formation of gaseous aluminum intermediates under specific conditions. The gas-solid reaction explains mass loss during the process and the mass transfer involved in whisker growth. Meanwhile, the solid-solid reaction mechanism accounts for the morphological continuity between the product and precursor, as well as the formation of intermediate compounds such as Al-O-C and Al-C-N during the conversion of Al₂O₃. This mechanism is more widely accepted.
The AlN powder manufacturing process mainly includes ball milling and mixing, nitridation synthesis, low-temperature decarburization, and AlN crushing/recovery.
2. Process Characteristics of Carbothermal Reduction
The carbothermal reduction method offers advantages such as abundant raw materials, simple processing, and suitability for large-scale production. The synthesized powder exhibits high sphericity, purity, fine particle size, narrow size distribution, and good dispersibility, making it the primary industrial method for AlN powder production. Compared to direct nitridation and SHS, carbothermal reduction yields better sphericity and higher purity AlN powder .
About Xiamen Juci Technology Co., Ltd.
Xiamen Juci Technology Co., Ltd. is a high-tech enterprise specializing in the research, development, production, and sales of high-performance ceramic materials. The company is committed to providing high-quality aluminum nitride series products and solutions for industries such as electronics, semiconductors, and aerospace, earning widespread trust from customers with its exceptional quality and service.
Media Contact:
Xiamen Juci Technology Co., Ltd.
Phone: +86 592 7080230
Email: miki_huang@chinajuci.com
Website: www.jucialnglobal.com
Almost anything that you want to make it glow.
You can mix it into a transparent or semi-transparent medium such as resin, wax, paint, ink, paste, plastics, rubber, fabric, caulking, ceramic glaze, nail-polish etc.
There are industrial applications for safety, for novelty, for fun, for household using in arts and crafts. sinosunman Glow in the dark pigment can meet expectation of all purposes above-mentioned. Some detailed applications, such as egress signs, sudden darkness orientate system, outline marking, cell phone case, keyboard cover pad, screen-printing ink, night-glow shirts, toys, clothes, glass mosaic, garden decoration lights, etc., have been applied.
See some application samples in picture below:
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When it comes to advanced materials, N-Phenylmaleimide (N-PMI) stands out as a key additive for enhancing heat resistance and thermal stability in various polymer applications. As a trusted manufacturer and global supplier, Yangchen Tech delivers high-purity N-Phenylmaleimide Why Choose Yangchen Tech’s N-Phenylmaleimide? ✔ Exceptional Heat Resistance – Enhances ABS, PVC, and other engineering plastics, significantly improving HDT (Heat Distortion Temperature). ✔ High Purity (99.7%) – Ensures optimal efficiency in modifying polymers and coatings. ✔ Versatile Applications – Widely used in high-performance plastics, coatings, adhesives, and synthetic rubber. ✔ Reliable Global Supplier – With years of expertise in specialty chemicals and polymer additives, Yangchen Tech guarantees consistent quality and supply stability. Basic Information 
