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High-strength high-elasticity fully degradable plastic film and preparation method thereof

A plastic film, fully degradable technology, applied in the field of fully degradable plastic film, can solve the problems of high brittleness, poor processing performance, limited application range, etc., and achieve the effects of increasing compatibility, improving water resistance, and increasing strength

Inactive Publication Date: 2015-09-09
TONGLING FOUNDER PLASTICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the characteristics of natural polymers: poor processing performance, brittleness and water resistance, etc., their application range is limited.
To solve this problem, a single modification method such as plasticizing, acid adjustment, crosslinking, filling or blending is often used. However, this single modification method is limited, and the fully degradable plastic film prepared has a single function and high cost. Industrial production
Nano-silica materials have special functional effects of nanoparticles, which can be used to improve the mechanical properties and water resistance of natural polymer films and polyvinyl alcohol films. There are very few research reports on composite films with polyvinyl alcohol

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0013] The fully degradable plastic film with high strength and good elasticity is characterized in that it is made of the following raw materials in parts by weight: polyvinyl alcohol 117, sweet potato starch 69, nano silicon dioxide 1.8, light calcium carbonate 3.2, paraffin wax Emulsion 12, charcoal powder 4, nano boron fiber 5, methyl cellulose 1.8, appropriate amount of water.

[0014] The preparation method comprises the following steps:

[0015] (1) Add an appropriate amount of water to the sweet potato starch and stir to make a paste, heat and pregelatinize for 10-20 minutes, add light calcium carbonate and methyl cellulose, stir and mix at a constant temperature for 2-3 hours, filter and dry naturally to obtain modified sweet potatoes starch;

[0016] (2) Vacuum dry charcoal powder and nano-boron fibers at 105°C for 2-4 hours, add paraffin emulsion and nano-silica, stir and grind for 2-3 hours, and dry;

[0017] (3) Put polyvinyl alcohol in a water bath at 80-90°C a...

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Abstract

The invention discloses high-strength high-elasticity fully degradable plastic film taking polyvinyl alcohol and sweet potato starch as main film forming substances. Compared with a traditional technique, a preparation method provided by the invention has the characteristics that a physical-chemical method is adopted to modify nano silica and potato starch in cooperation with other active ingredients, so that hydroxyls in sweet potato starch and polyvinyl alcohol molecules preferably bond with a proper amount of hydroxyls on the surface of nano silica to form hydrogen bonds so as to increase the compatibility degree of sweet potato starch and polyvinyl alcohol and further improve the waterproofness of the film; and moreover uniformly dispersed single nano particles and nanoclusters can form a stress hard spot to improve the strength of the film. The prepared fully degradable plastic film is transparent, soft, non-poisonous, harmless and fully degradable and has high elasticity.

Description

technical field [0001] The invention relates to the technical field of natural polymer materials, in particular to a fully degradable plastic film with high strength and good elasticity and a manufacturing method thereof. Background technique [0002] Synthetic polymer materials bring great convenience to people's life, but also cause serious pollution to the environment. In addition, the oil reserves for making traditional plastics are constantly decreasing. Therefore, renewable and environmentally friendly natural polymer materials have become a research hotspot. , Cellulose, starch, protein, etc. are natural polymers that are actually studied and applied more at present, so natural polymer-type fully degradable materials have become one of the research hotspots of new environment-friendly materials. [0003] Natural polymers have attracted extensive attention in the fields of food packaging and plastic film applications due to their wide source of raw materials, strong bi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L29/04C08L3/04C08L91/06C08K13/06C08K9/00C08K3/04C08K3/36C08K3/26C08K7/06
Inventor 陈可夏陈可亮潮建平
Owner TONGLING FOUNDER PLASTICS TECH
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