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Degradable film and preparation method thereof

A technology for degrading films and containers, applied in the field of degradable films and preparation, can solve problems such as easy water loss, shortened service life, and film drying, and achieve the effects of avoiding unfavorable factors, reducing the number of bubbles, and improving tensile strength

Inactive Publication Date: 2019-12-13
青海益洁生物工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The characteristics of similar products currently on the market: PVA, a water-soluble material, is used as the main component of film formation. The anti-static effect is good, and it can be printed directly without corona treatment. However, the cost of this film is twice that of ordinary plastics, and the marketization process is slow. Food or non-food films made of PVA have lower strength than ordinary plastics, but the degradation rate is very fast. High, environmental protection effect is obvious, the defect of similar products on the market at present: PVA film is very soluble in water, water resistance is insufficient, can not be recycled twice, after the film is made, it can be stored at room temperature (temperature 25 ℃, humidity 30%) It is easy to lose water, causing the film to be dry, uneven, and the service life is obviously shortened. The film strength is low, and its physical parameters are less than half of the strength of ordinary polyethylene film.

Method used

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  • Degradable film and preparation method thereof
  • Degradable film and preparation method thereof
  • Degradable film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The method for preparing a small amount of PVA degradable film in the laboratory is as follows, formula; PVA 100g, corn starch 40g, glycerin 40g, crosslinking agent PLA 5g, filling modifier sugarcane fiber 10g and purified water 1700g.

[0027] Among them, PVA and the cross-linking agent PLA have good mutual solubility, and both have a degradation effect, glycerin has a plasticizing effect, starch and filling modifier sugarcane fiber have a filling effect, and make them have good biocompatibility .

[0028] A method for preparing a small amount of PVA degradable film in the laboratory, such as figure 1 with figure 2 shown, including the following steps:

[0029] A. Soaking: Add 100g of PVA and 1000g of purified water into a 5L steam-heated stirring tank and stir evenly, let it stand for 12 hours before use; add 40g of cornstarch and 400g of purified water into a container 1 with a volume of 1L, and soak for 4 hours for use Add glycerin 40g, cross-linking agent PLA5g...

Embodiment 2

[0052] The working principle of embodiment 2 is the same as that of embodiment 1.

[0053] Implementation column 3

[0054] A degradable film, each component by weight percentage: PVA 50%, corn starch 20%, glycerin 20%, crosslinking agent PLA 2.5%, filler modifier 20% sugarcane fiber and purified water 870%.

[0055] Among them, PVA and the cross-linking agent PLA have good mutual solubility, and both have a degradation effect, glycerin has a plasticizing effect, starch and filling modifier sugarcane fiber have a filling effect, and make them have good biocompatibility .

[0056] Such as figure 1 with figure 2 Shown, a kind of preparation method of degradable film comprises the following steps:

[0057] A. Soaking: Add 50% PVA and 500% purified water into the steam heating mixing tank and stir evenly, and then set aside for use after standing for 12 hours; add 20% corn starch and 200% purified water into container 1, and soak for 4 hours for later use; In 2, add 20% glyc...

Embodiment 3

[0065] The working principle of embodiment 3 is the same as that of embodiment 1.

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Abstract

The invention discloses a degradable film. The degradable film is prepared from the following raw materials by weight percentage: 50%-60% of PVA, 20%-30% of corn starch, 20%-30% of glycerin, 2.5%-3% of a cross-linking agent PLA, 20%-30% of a filling modifier sugarcane fiber and 870%-1000% of purified water. The invention discloses a preparation method of the degradable film. The method includes the steps of: A. soaking: adding 50%-60% of PVA and 500%-600% of purified water into a steam heating stirring tank, stirring the substances evenly and performing standing for standby use. According to the invention, the macromolecular PVA and starch structure is filled with the micromolecular filling modifier sugarcane fiber to obtain the PVA film with higher strength, the water resistance of the film is strengthened, the film still keeps certain strength and elasticity after being soaked in water for a period of time, can be recycled, and is finally hydrolyzed and broken after being soaked in water for a long time, the degradation process is rapid, waste discarding is reduced, and stepwise heating and stepwise mixing avoid overheating decomposition of starch and other organic raw materialsand the influence on cross-linking.

Description

technical field [0001] The invention relates to the field of degradable film and preparation technology, in particular to a degradable film and a preparation method. Background technique [0002] The characteristics of similar products currently on the market: PVA, a water-soluble material, is used as the main component of the film. The anti-static effect is good, and it can be printed directly without corona treatment, but the cost of this film is twice that of ordinary plastics, and the marketization process is slow. Food or non-food films made of PVA have lower strength than ordinary plastics, but the degradation rate is very fast. High, environmental protection effect is obvious, the defect of similar products on the market at present: PVA film is very soluble in water, water resistance is insufficient, can not be recycled twice, after the film is made, it can be stored at room temperature (temperature 25 ℃, humidity 30%) It is easy to lose water, resulting in dry and u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L29/04C08L3/02C08L67/04C08L97/02C08K5/053C08J5/18
CPCC08J5/18C08J2329/04C08J2403/02C08J2467/04C08J2497/02C08K5/053
Inventor 袁东平
Owner 青海益洁生物工程有限公司
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