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27
2017
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09
Development Trends of EVA Hot Melt Adhesives
Modified EVA hot melt adhesive is a vibrant new technology, new material, and new process, providing strong support for the high-speed, automated, and continuous development of China's modern industry. With the advancement of modern industry, it will inevitably drive continuous innovation and development of EVA hot melt adhesive modification technology. Foreseeable new research progress will continue in the following areas: Modification of the main material using copolymerization, blending, and crosslinking methods; introduction of various polar or non-polar side chains and double-chain segments to improve the cohesive strength of the copolymer; continued improvement of the bonding performance of EVA hot melt adhesive, continuously expanding the range of use, ensuring convenient operability and reliable effects under various different conditions; development of reactive EVA hot melt adhesive to improve the heat resistance, cohesive strength, bonding strength, and solvent resistance of EVA hot melt adhesive; introduction of photocuring technology and electron beam curing technology into the R&D of EVA hot melt adhesive, forming a new performance hot melt adhesive with no environmental pollution, fast curing, and significantly reduced energy consumption; research on the participation and density control of effective water-soluble substances in EVA hot melt adhesive, so that EVA hot melt adhesive can be conveniently separated and recycled from the bonded goods during the waste disposal cycle, making it environmentally friendly.
EVA edge banding hot melt adhesive is made by blending EVA, tackifier, viscosity modifier, antioxidant, and filler. To improve its adhesion, fluidity, heat resistance, and toughness, plasticizers and other low molecular weight polymers can also be added in appropriate amounts. The matrix polymer of EVA edge banding hot melt adhesive is ethylene-vinyl acetate copolymer, which is the main component of hot melt adhesive, and its function is to generate the necessary bonding strength and cohesive strength. EVA used as hot melt adhesive should have the following properties: easy to melt when heated, good thermal stability, no oxidative decomposition in the molten state and a certain durability; heat-resistant, cold-resistant and a certain flexibility; certain compatibility with other components; strong adaptability to the adherend, high bonding strength; viscosity can be adjusted at a certain temperature, and the color should be as light as possible. The VA content, relative molecular weight, and molecular branching degree of EVA resin determine the properties of the resin. Because vinyl acetate monomer is introduced into the EVA resin molecular chain, the crystallinity is lower than that of polyethylene resin, and the flexibility and impact resistance of the resin are improved. (Data from the internet)
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Development Trends of EVA Hot Melt Adhesives
Published Time:
2017-09-27 17:00
Modified EVA hot melt adhesive is a vibrant new technology, new material, and new process, providing strong support for the high-speed, automated, and continuous development of China's modern industry. With the advancement of modern industry, it will inevitably drive continuous innovation and development of EVA hot melt adhesive modification technology. Foreseeable new research progress will continue in the following areas: Modification of the main material using copolymerization, blending, and crosslinking methods; introduction of various polar or non-polar side chains and double-chain segments to improve the cohesive strength of the copolymer; continued improvement of the bonding performance of EVA hot melt adhesive, continuously expanding the range of use, ensuring convenient operability and reliable effects under various different conditions; development of reactive EVA hot melt adhesive to improve the heat resistance, cohesive strength, bonding strength, and solvent resistance of EVA hot melt adhesive; introduction of photocuring technology and electron beam curing technology into the R&D of EVA hot melt adhesive, forming a new performance hot melt adhesive with no environmental pollution, fast curing, and significantly reduced energy consumption; research on the participation and density control of effective water-soluble substances in EVA hot melt adhesive, so that EVA hot melt adhesive can be conveniently separated and recycled from the bonded goods during the waste disposal cycle, making it environmentally friendly.
EVA edge banding hot melt adhesive is made by blending EVA, tackifier, viscosity modifier, antioxidant, and filler. To improve its adhesion, fluidity, heat resistance, and toughness, plasticizers and other low molecular weight polymers can also be added in appropriate amounts. The matrix polymer of EVA edge banding hot melt adhesive is ethylene-vinyl acetate copolymer, which is the main component of hot melt adhesive, and its function is to generate the necessary bonding strength and cohesive strength. EVA used as hot melt adhesive should have the following properties: easy to melt when heated, good thermal stability, no oxidative decomposition in the molten state and a certain durability; heat-resistant, cold-resistant and a certain flexibility; certain compatibility with other components; strong adaptability to the adherend, high bonding strength; viscosity can be adjusted at a certain temperature, and the color should be as light as possible. The VA content, relative molecular weight, and molecular branching degree of EVA resin determine the properties of the resin. Because vinyl acetate monomer is introduced into the EVA resin molecular chain, the crystallinity is lower than that of polyethylene resin, and the flexibility and impact resistance of the resin are improved. (Data from the internet)
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