Study on High-Temperature Boiling Resistant Polyurethane Adhesive for Composite Flexible Packaging
In this paper,polyester was prepared by long carbon chain poly acid and polyol,and multi-functional raw materials were introduced to prepare high solid ester-soluble polyurethane adhesive.The results showed that under the condition of no coupling agent,the composite flexible packaging with this adhesive had very low soluble residue,after high-temperature boiling at 135 ℃,it exhibits good appearance,good adhesive performance and good aging resistance.
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