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Solveless polyurethane coating adhesive can only be applied to low-end packaging products at the beginning, but with the continuous advancement of domestic and foreign scholars' research work, through the modification of polyols to improve its heat resistance, water resistance, oil resistance, etc., so that this situation has been improved. The introduction of multi-functional substances can increase the crosslinking density of polyurethane composite film, thus improving the heat resistance.
Guangdong Xinhui Chemical Company used poly1, 4-butanediol adipate, castor oil and isophorone diisocyanate as raw materials to synthesize the A component of solvent-free adhesive, and modified castor oil with silane coupling agent to prepare modified castor oil (which can improve water resistance, cooking resistance and thermal performance) and added it to the B component of solvent-free adhesive. A kind of two-component solvent-free aluminum foil cooking adhesive resistant to high temperature 135℃ was obtained.
The mandatory national standard GB18581-2001 "Restriction of harmful substances in solvent-borne wood coatings for interior decoration materials" has been implemented since 2002, which has...
From the 1970s on, foreign countries began to study the two-component non-solvent J-type polyurethane adhesive. Since the 1980s, the United States, Italy, France, Germany and other countries have...
In the anti-static technology of flexible packaging, the electrical insulation of plastic materials is very good, but static electricity is easily generated during processing and use. Foreign matter...
The composite film flexible packaging, which can function as a barrier and can be printed and heat-sealed at the same time, has been widely used in food, medicine, cosmetics and other fields. It has...
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