Formula and preparation method for non-toxic and environment-friendly polyvinyl chloride high-foaming glue for bottle cap

Abstract

The invention discloses a formula and a preparation method for non-toxic and environment-friendly polyvinyl chloride high-foaming glue for bottle caps. In the formula, the foaming glue comprises the following components in part by weight: 90 to 100 parts of polyvinyl chloride resin, 60 to 70 parts of acetyl tributyl citrate, 1.8 to 2.4 parts of foaming agent, 0.6 to 1 part of dimethyl silicon oiland 10 to 30 parts of heavy calcium carbonate. In the formula, by regulating and controlling the plasticizing action of polyvinyl chloride (PVC) sealant strictly, the plasticizing action of the PVC sealant is matched with the decomposition temperature of the foaming agent, so the prepared PVC high foaming glue is high in foaming magnification, uniform in foaming density, appropriate in softness and hardness and good in a sealing effect, and basically reaches the performance of conventional sealing gaskets in which azodicarbonamide is taken as the foaming agent. The high-foaming glue is non-toxic, low in production cost, easy to produce and good in a using effect.

Description

technical field [0001] The invention relates to a plastic formula and a preparation method, in particular to a non-toxic and environment-friendly polyvinyl chloride bottle cap high foaming glue formula and a preparation method. Background technique [0002] At present, food contact materials have an important impact on food safety. Although inferior food contact materials do not cause immediate harm to consumers' bodies like viruses and bacteria, toxic and harmful substances will migrate when these products are used repeatedly for a long time into food, causing chronic poisoning through accumulation through consumption. From the scandal of toxic and carcinogenic polyvinyl chloride (PVC) cling film in 2005, to poisonous baby bottles, disposable foam lunch boxes, and the ban on the sale of more than 10 kinds of chili pepper products in Asia by Zurich and other countries, the safety of food packaging materials Sexual issues are getting more and more attention. [0003] As a p...

AI Technical Summary

Problems solved by technology

At present, although there have been researches on non-toxic and environmentally friendly high-foaming adhesives, there are problems such as insufficient foaming ratio, or uneven hardness and foaming density, and unsatisfactory sealing effects. Therefore, the development of new non-toxic and environmentally friendly PVC High foaming rubber has become an urgent problem to be solved. It is not only related to the survival and development of a large number of domestic food companies, but also has extremely important practical significance for the upgrading of food packaging materials.

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