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Starch-filled medium-temperature water-soluble PVA composition capable of being subjected to thermoplastic film formation, and particles and preparation method thereof

A technology of composition and starch, which is applied in the field of biodegradable materials, can solve the problems of high processing cost, low production capacity, and difficult processing of extrusion blow molding or melt casting film, so as to realize thermoplastic processing and reduce cost, the effect of overcoming easily decomposed carbonization

Inactive Publication Date: 2020-07-28
BEIJING YISIDE LOGISTICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 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 it is more difficult to process by extrusion blow molding or melt casting

Method used

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  • Starch-filled medium-temperature water-soluble PVA composition capable of being subjected to thermoplastic film formation, and particles and preparation method thereof

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preparation example Construction

[0055] In a second aspect, the present invention provides a method for preparing thermoplastic film-forming starch-filled medium-temperature water-soluble PVA particles, the method comprising:

[0056] The step of filling the above-mentioned thermoplastic film-forming starch with the medium-temperature water-soluble PVA composition through mixing and granulating.

[0057] In the method of the present invention, there is no particular limitation on the preparation method of the above-mentioned thermoplastic film-forming starch-filled medium-temperature water-soluble PVA particles, 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:

[0058] (1) Stir all the compositions described in a high-speed mixer at room temperature for 5-20 minutes;

[0059] (2) Use a parallel twin-screw granulator to extrude and gra...

Embodiment 1

[0071] A thermoplastic film-forming starch-filled medium-temperature water-soluble PVA composition, comprising:

[0072] 80 parts by weight of PVA1788, 20 parts by weight of tapioca starch, 25 parts by weight of sorbitol, 5 parts by weight of PEG-4000, 2 parts by weight of organic tin stabilizer, 2 parts by weight of epoxy soybean oil, 1 part by weight of antioxidant 1010, 2 parts by weight of DSTP Parts by weight, N,N'-bis(2,6-diisopropylphenyl)carbodiimide 2 parts by weight, SHP-60 1 part by weight.

Embodiment 2

[0074] A thermoplastic film-forming starch-filled medium-temperature water-soluble PVA composition, comprising:

[0075] 90 parts by weight of PVA2088, 10 parts by weight of potato starch, 15 parts by weight of mannitol, 20 parts by weight of glycerin, 3 parts by weight of PEG-3000, 2 parts by weight of rare earth stabilizer, 3 parts by weight of sorbitan stearate, antioxidant Agent 697 3 parts by weight, 168 0.5 parts by weight, polymerized carbodiimide UN-03 2 parts by weight, SHP-50 1.5 parts by weight.

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Abstract

The invention belongs to the field of biodegradable materials, and discloses a starch-filled medium-temperature water-soluble PVA (polyvinyl alcohol) composition capable of being subjected to thermoplastic film formation as well as particles and a preparation method thereof. The starch-filled medium-temperature water-soluble PVA composition capable of being subjected to thermoplastic film formingcomprises PVA, starch, a small-molecular plasticizer, a large-molecular plasticizer, a thermal decomposition inhibitor, a thermo-oxidative aging resisting agent, a hydrolysis resisting agent and an organic silicon water repellent; on the basis of 100 parts by weight of PVA and 100 parts by weight of starch, the content of the small molecular plasticizer is 15 to 55 parts by weight, the content ofthe macromolecular plasticizer is 1-15 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 hydrolysis resistant agent is 2-6 parts by weight, and the content of the organic silicon water repellent is 0.1-2 parts by weight. After the starch-filled medium-temperature water-soluble PVA particles capable of being subjected to thermoplastic film forming provided by the invention are subjected to thermoplastic film forming, the initial water-soluble temperature of the film is greater than 40 DEG C.

Description

technical field [0001] The invention relates to the field of biodegradable materials, in particular to a starch-filled medium-temperature water-soluble PVA composition capable of thermoplastic film formation, its particles and a preparation method. Background technique [0002] Polyvinyl alcohol (PVA) is soluble in water at different temperatures, has high mechanical properties, good transparency, high oil and corrosion resistance, and can be split and degraded under natural conditions, and finally biodegraded into carbon dioxide and water. The natural environment is a biodegradable environmentally friendly material. [0003] PVA low-temperature water-soluble film refers to a film that starts to dissolve in water at a relatively low temperature (23°C), also known as a normal-temperature water-soluble film, and its raw material is partially alcoholysed PVA; ) above the film that just begins to dissolve in water, its raw material is complete alcoholysis type PVA. [0004] PV...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L29/04C08L3/02C08L71/02C08L91/00C08K5/053C08K5/57C08K5/134C08K5/00C08K5/17C08K3/22C08K13/02
CPCC08K2003/2224C08L29/04C08L2203/16C08L2205/025C08L2205/035C08L3/02C08L71/02C08L91/00C08K5/053C08K5/57C08K5/1345C08K5/00C08K5/17C08K3/22C08K13/02
Inventor 常江
Owner BEIJING YISIDE LOGISTICS TECH