High-temperature water-soluble PVA composition, high-temperature water-soluble PVA particles and preparation method of high-temperature water-soluble PVA particles

Abstract

The invention belongs to the field of biodegradable materials, and discloses a high-temperature water-soluble polyvinyl alcohol (PVA) composition and particles thereof. The high-temperature water-soluble PVA composition comprises PVA, a plasticizer, a thermal decomposition inhibitor, a thermo-oxidative aging resistant agent, a lubricant and an organic silicon water repellent. Based on 100 parts byweight of PVA, the content of the plasticizer is 5-50 parts by weight, the content of the thermal decomposition inhibitor is 1-8 parts by weight, the content of the thermo-oxidative aging resistant agent is 0.5-6 parts by weight, the content of the lubricant is 2-6 parts by weight, and the content of the organic silicon water repellent is 0.1-1 part by weight (in terms of solid content). The initial water-soluble temperature of the high-temperature water-soluble PVA particles provided by the invention is 90 DEG C or above, so that the use temperature of the completely alcoholysis type PVA after film formation is increased.

Description

technical field [0001] The invention relates to the field of biodegradable materials, in particular to a high-temperature water-soluble PVA composition, high-temperature water-soluble PVA particles and a preparation method thereof. Background technique [0002] In the field of packaging, plastic is the most widely used packaging material, but with the increasingly serious environmental problems, energy depletion and food safety threats, people are turning their attention to biodegradable materials. Polyvinyl alcohol (PVA) not only has the performance and characteristics of traditional plastics, but also can be split and degraded in water at different water temperatures or under natural conditions, and finally biodegraded into carbon dioxide and water in the form of returning to the natural environment. It is a biodegradable environmentally friendly material . [0003] PVA water-soluble film is mostly produced by solution casting method, which has extremely high processing c...

AI Technical Summary

Problems solved by technology

[0003] PVA water-soluble film is mostly produced by solution casting method, which has extremely high processing cost and low production capacity. The thermoplastic film forming method using traditional plastic film bags is a processing method with low energy consumption and high production capacity. However, due to the high production capacity of PVA The melting temperature is close to the decomposition temperature, and the processing of thermoplastic film is difficult

Especially the complete alcoholysis type PVA, that is, the PVA raw material with an alcoholysis degree of more than 99%, can be produced and processed into high-temperature (above 80°C) water-soluble PVA film materials, which have a wide range of application scenarios, but because it is sensitive to temperature, it is easier to decompose Carbonization has extremely high requirements on processing equipment

Images