Medium-temperature water-soluble PVA composition for melting, casting and film forming, particles and preparation method thereof

A technology of casting film forming and composition, which is applied in the field of medium temperature water-soluble PVA composition and its particles and preparation, can solve the problems of difficult melt casting film forming, poor melt fluidity, high processing cost, etc., and achieve the benefit of melting Film formation by casting method, high melt flow rate and small investment

Inactive Publication Date: 2020-05-29
BEIJING YISIDE LOGISTICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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. Melt casting film forming method using traditional plastic film bag is a processing method with low energy consumption

Method used

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  • Medium-temperature water-soluble PVA composition for melting, casting and film forming, particles and preparation method thereof

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preparation example Construction

[0049] Second aspect, the present invention provides a kind of preparation method of the medium-temperature water-soluble PVA particle that melt casting film forms, and this method comprises:

[0050] The above steps of mixing and granulating the medium-temperature water-soluble PVA composition formed by melting and casting into a film.

[0051] In the method of the present invention, there is no particular limitation on the preparation method of the above-mentioned medium-temperature water-soluble PVA particles formed by melt casting into a film, which can be various preparation methods conventionally adopted by those skilled in the art, and will not be described again. In a specific embodiment of the present invention, it is prepared according to the following steps:

[0052] (1) Stir all the compositions described in a high-speed mixer at room temperature for 5-20 minutes;

[0053] (2) Use parallel twin-screw granulator to extrude and granulate to obtain medium-temperature...

Embodiment 1

[0064] A medium-temperature water-soluble PVA composition formed by melt casting into a film, comprising:

[0065] 100 parts by weight of PVA1788, 25 parts by weight of sorbitol, 2 parts by weight of organic tin heat stabilizer, 2 parts by weight of aluminum distearate, 10102 parts by weight of antioxidant, 1 part by weight of DSTP, 2 parts by weight of polyethylene wax, SHP-601 Parts by weight, 1 part by weight of cocamidopropyl hydroxysultaine.

Embodiment 2

[0067] A medium-temperature water-soluble PVA composition formed by melt casting into a film, comprising:

[0068] 100 parts by weight of PVA2088, 15 parts by weight of ethylene glycol, 20 parts by weight of glycerin, 2 parts by weight of rare earth heat stabilizer, 3 parts by weight of barium stearate, 6973 parts by weight of antioxidant, 1680.5 parts by weight, 2 parts by weight of pentaerythritol stearate 1.5 parts by weight of SHP-50, 1.5 parts by weight of cocamidopropyl betaine.

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Abstract

The invention belongs to the field of biodegradable materials, and discloses a medium-temperature water-soluble PVA composition for melting, casting and film forming, particles and a preparation method thereof. The medium-temperature water-soluble PVA composition comprises PVA, a plasticizer, a thermal decomposition inhibitor, a thermo-oxidative aging resistant agent, a lubricant, an organic silicon water repellent and a zwitterionic surfactant. Relative to the 100 weight parts of PVA, the content of the plasticizer is 15-55 parts by weight, the content of the thermal decomposition inhibitor is 1-8 parts by weight, the content of the antioxidant is 0.5-6 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 2-6parts by weight, the content of the organic silicon water repellent is 0.1-1 part by weight (in terms of solid content), and the content of the zwitterionic surfactant is 0.1-2 parts by weight (in terms of solid content). According to the invention, melt casting film formation of PVA is realized, and the initial water-soluble temperature of the medium-temperature water-soluble PVA particles aftermelt casting film formation is 40 DEG C or above.

Description

technical field [0001] The invention relates to the field of biodegradable materials, in particular to a medium-temperature water-soluble PVA composition formed by melting and casting into a film, particles thereof 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 under natural conditions, and finally biodegraded into carbon dioxide and water to return 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 cost and low production capacity. Melt castin...

Claims

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Application Information

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IPC IPC(8): C08L29/04C08L23/06C08K5/00C08K5/57C08K5/098C08K5/134C08K5/053C08J5/18
CPCC08J5/18C08J2329/04C08L29/04C08L2203/16C08L2205/025C08L2205/03C08L23/06C08K5/00C08K5/57C08K5/098C08K5/1345C08K5/053C08K5/524C08K5/103C08K5/1515
Inventor 常江
Owner BEIJING YISIDE LOGISTICS TECH
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