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Polyvinyl alcohol full-biodegradation film having water resistance and preparation method thereof

A technology of polyvinyl alcohol and degradable film, which is applied in the field of materials, can solve the problems of easy precipitation and non-environmental protection, and achieve the effects of saving energy, expanding the scope of application and practical value

Inactive Publication Date: 2017-05-24
彭先彧
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] The purpose of the present invention is to solve the technical problems of existing products that are toxic, not environmentally friendly, and easy to precipitate, and to provide a water-resistant polyvinyl alcohol fully biodegradable film and its preparation method that is non-toxic, environmentally friendly, and has a reasonable preparation method and is not easy to precipitate.

Method used

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  • Polyvinyl alcohol full-biodegradation film having water resistance and preparation method thereof

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Experimental program
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Embodiment 1

[0035]Calculated in parts by weight, the formula is: polyvinyl alcohol (polymerization degree 400, alcoholysis degree 99%): 100 parts; crosslinking agent borax: 0.5 part; lubricant calcium stearate: 1.5 parts; small molecule plasticizer Water: 15 parts; small molecule plasticizer glycerin: 10 parts; macromolecular plasticizer polylactic acid: 10 parts; acidity remover magnesium hydroxide: 2 parts; heat stabilizer calcium chloride 3 parts.

[0036] Pre-mix the polyvinyl alcohol and borax aqueous solution first, then add other materials and mix well, then add to the double-butterfly extruder to extrude into thin sheets, then directly roll and pull to form a film with a thickness of 5-30 microns , and humidify, cut and roll. The extrusion temperature was 200° C., and the screw speed was 100 rpm.

Embodiment 2

[0038] The formula is: polyvinyl alcohol (polymerization degree 400, alcoholysis degree 99%): 100 parts; crosslinking agent borax: 0.5 part; lubricant calcium stearate: 0.5 part; lubricant silicone composition 2 parts; Plasticizer water: 15 parts; small molecule plasticizer glycerin: 10 parts; macromolecular plasticizer polylactic acid: 10 parts; acidity remover magnesium hydroxide: 2 parts; heat stabilizer calcium chloride 3 parts.

[0039] The processing method and parameter of embodiment 2 are identical with embodiment 1.

[0040] Compared with Example 1, due to the covering effect and anti-blocking effect of the lubricant silicone composition, the surface color of the film in Example 2 is whiter, smoother, and less likely to block. But the disadvantage is the increased cost.

Embodiment 3

[0042] The formula is: polyvinyl alcohol (polymerization degree 400, alcoholysis degree 99%): 100 parts; crosslinking agent borax: 0.5 parts; lubricant calcium stearate: 1.5 parts; small molecule plasticizer water: 15 parts; Molecular plasticizer glycerin: 10 parts; macromolecular plasticizer polylactic acid: 20 parts; acidity remover magnesium hydroxide: 2 parts; heat stabilizer calcium chloride 3 parts.

[0043] The processing method and parameter of embodiment 3 are identical with embodiment 1.

[0044] Compared with Example 1, since the macromolecular plasticizer polylactic acid is increased to 20 parts, the fluidity and melt elasticity of the material are further improved, and the reject rate in film processing is reduced. But the disadvantage is the increased cost.

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Abstract

The invention relates to a polyvinyl alcohol full-biodegradation film having water resistance and a preparation method thereof. A technical problem that an existing product is toxic, is not environmentally friendly and is separated out easily is solved. The polyvinyl alcohol full-biodegradation film comprises, by weight parts, 100 parts of polyvinyl alcohol, 0.1-1 part of crosslinking agent, 1-3 parts of lubricant, 10-25 parts of small molecule plasticizer, 10-20 parts of macromolecular plasticizer, 0-3 parts of sour removal agent and 1-5 parts of heat stabilizer. The invention provides the method for preparing the polyvinyl alcohol full-biodegradation film. The method can be used for the field of preparation of full-biodegradation films.

Description

technical field [0001] The invention relates to the field of materials, in particular to a fully biodegradable polyvinyl alcohol film with water resistance and a preparation method thereof. Background technique [0002] In the entire field of plastic industrial products, packaging film materials occupy an important market share, and plastic film packaging materials are also the most important source of white pollution. This problem is even more acute today as cities are increasingly surrounded by landfills. Since the end of the 1970s, the research on degradable plastics in various countries in the world has mainly focused on two categories: starch-filled plastics and photodegradable plastics. Among them, only the starch part of the starch-filled plastic can be completely degraded, but the plastic part still remains in the soil; while the photodegradable plastic can only be degraded under sunlight, and cannot solve the problem of degradation of the landfill part in the soil....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L29/04C08L67/04C08K13/02C08K3/38C08K5/098C08K5/053C08K3/22C08K3/16B29C47/92B29L7/00B29C48/92
CPCC08L29/04B29C48/92B29C2948/9259B29C2948/92704B29C2948/92885B29L2007/00C08J5/18C08J2329/04C08J2467/04C08L2201/06C08L2203/16C08L67/04C08K13/02C08K2003/387C08K5/098C08K5/053C08K2003/2224C08K2003/162C08K5/09
Inventor 彭先彧
Owner 彭先彧
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