Pesticide bottle PET sealing film and its making method

The name of the pesticide bottle PET sealing film and its production method Patent applicant Zhang Chengguang Principal applicant Address 325804 No. 111, Fifth Textile Street, Longgang Town, Cangnan County, Zhejiang Province Inventor Zhang Chengguang Application (Patent) No. 200510027176.7 Date of Application 2005.06.23 Certification Date Approval Announcement No. 1709946 Auditing Notice Day 2005.12.21 Manual CD No. D0551 Main Classification No. C08J5/12 Classification No. C08J5/12; B32B15/08; B65D53/06 Subdivision Original Application No. Item Summary Abstract This invention is applied to the sealing of pesticide bottles. A PET sealing film and its manufacturing method. (1) First select high-temperature thermal-bonded PET film for oxidative dyeing or printing with high-temperature color ink or high-temperature roller coloring; (2) Use the above-mentioned colored PET film with polyurethane for 0.65-5.00 thick aluminum foil Adhesive phase compounding; Polyurethane adhesive is mainly composed of polyester polyol compounded with isocyanate containing macromolecule compound of cross-linked body; polyester polyol is composed of dibasic acid (eg: cis-dicarboxylic anhydride, sebacic acid Etc.) obtained by esterification with an excess of polyols (eg trimethylolpropane, acetol); (3) then using a PET film with a thickness of 1.2 to 5 and a combined PET foil of 240°C or more. Composite membrane. The present invention not only overcomes the disadvantages of excessively high seal air permeability, poor sealing performance and uneven sealing fastness in the past, but also solves the problem of repetitive sealing due to sealing defects and poor corrosion resistance due to poor sealing and resistance to acid and alkali and to people and livestock. , The environment has caused major hazards that have not been solved, and has improved the shelf life of pesticides. Sovereignty item 1. A pesticide bottle PET sealing film and its production method, characterized in that it is mainly produced by the following steps: (1) First, a high temperature thermal adhesive PET film is used for oxidation color change or printing of high temperature resistant color ink or high temperature roller (2) The above-mentioned colored PET film is further compounded with a polyurethane adhesive having a thickness of 0.65-5.00<filament thickness; the polyurethane adhesive is mainly composed of a polyester polyol compounded with isocyanate and contains a cross-linked body. Polymer compounds; polyester polyols are esterified with dibasic acids (eg, cis-dicarboxylic anhydride, azelaic acid, etc.) and excess polyols (eg, trimethylolpropane, ethylene glycol). And then; (3) Then choose the PET film 1.2-5< silk thickness > 240 °C above and the above composite PET foil composite.