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Blow-molded PVA low-temperature water-soluble film and preparation method thereof

A blow molding, water-soluble film technology, applied in the field of blow-molded PVA low-temperature water-soluble film and its preparation, can solve the problems of plastic waste endangering the earth's ecological environment, affecting continuous production and processing, and plastic being difficult to degrade by itself, and to overcome The effect of easy decomposition and carbonization, low investment and excellent plastic performance

Inactive Publication Date: 2020-05-01
BEIJING YISIDE LOGISTICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the rapid development and wide application of the plastic industry has brought about some serious problems: first, plastics are difficult to degrade in the natural environment, and the plastic waste that is difficult to recycle seriously endangers the ecological environment of the earth; second, most of the current plastic products come from petroleum resource
At present, PVA low-temperature water-soluble film is mostly produced by solution casting method, which has extremely high processing cost and low production capacity. The blow molding method using traditional plastic film bags is a processing method with low energy consumption and high production capacity, but due to The melting temperature of PVA is similar to the decomposition temperature. During the blow molding process, PVA is prone to decompose and form blisters, and air leakage affects continuous production and processing.

Method used

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  • Blow-molded PVA low-temperature water-soluble film and preparation method thereof

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preparation example Construction

[0037] In the second aspect, the present invention provides a method for preparing PVA low-temperature water-soluble film, the method comprising:

[0038] The above-mentioned blow-molded PVA low-temperature water-soluble film is pelletized and blow-molded.

[0039] In the specific embodiment of the present invention, the preparation is carried out according to the following steps:

[0040] (1) Stir all the components in a high-speed mixer at room temperature for 5-20 minutes;

[0041] (2) Use parallel twin-screw pelletizing unit to extrude and pelletize to obtain PVA water-soluble particles that can be blow molded;

[0042] Among them, the temperature of each section of the twin-screw granulation unit is 45-200°C, and the screw speed is 200-450rpm.

[0043] (3) Use a PVA film blowing machine to blow PVA water-soluble particles into PVA low-temperature water-soluble film;

[0044] Among them, the temperature of each section of the screw of the PVA blown film machine is 180-220℃, and the te...

Embodiment 1

[0055] Blow-molded PVA low-temperature water-soluble film, including:

[0056] PVA2088 100 parts by weight, 25 parts by weight of glycerol, 2 parts by weight of aluminum distearate, 1 part by weight of magnesium hydroxide, 2 parts by weight of antioxidant 1010, 2 parts by weight, 1 part by weight of DSTP, 1 part by weight of polyethylene wax, N, N' -0.1 parts by weight of bis(2,6-diisopropylphenyl)carbodiimide.

Embodiment 2

[0058] Blow-molded PVA low-temperature water-soluble film, including:

[0059] PVA2288 100 parts by weight, 15 parts by weight of diethanolamine, 10 parts by weight of triethanolamine, 2 parts by weight of zinc stearate, 2.5 parts by weight of magnesium stearate, 0.5 parts by weight of antioxidant 1010, 0.5 parts by weight of antioxidant 626, liquid 1 part by weight of paraffin wax and 0.2 part by weight of poly-bis(1,3,5-triisopropylphenyl)carbodiimide.

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Abstract

The invention relates to the field of biodegradable materials, and discloses a blow-molded PVA low-temperature water-soluble film and a preparation method thereof. The blow-molded PVA low-temperaturewater-soluble film comprises PVA, a plasticizer, a thermal decomposition inhibitor, a thermo-oxidative-aging-resistant agent, a lubricant and a hydrolysis-resistant agent, wherein based on 100 parts by weight of PVA, the content of the plasticizer is 5-50 parts by weight, the content of the thermal decomposition inhibitor is 1-10 parts by weight, the content of the thermo-oxidative-aging-resistantagent is 0.5-5 parts by weight, the content of the lubricant is 0.1-5 parts by weight, and the content of the hydrolysis-resistant agent is 0.1-1 part by weight. The blow-molded PVA low-temperature water-soluble film provided by the invention can realize continuous granulation and blow molding film forming of a low-temperature water-soluble PVA raw material.

Description

Technical field [0001] The invention relates to the field of biodegradable materials, in particular to a blow-molded PVA low-temperature water-soluble film and a preparation method thereof. Background technique [0002] Plastics have become an indispensable part of people's lives and world trade activities. Because of their light weight, good mechanical properties, and easy processing, they are widely used in various fields. However, the rapid development and wide application of the plastics industry have brought about some serious problems: First, plastics are difficult to degrade in the natural environment, and plastic waste that is difficult to recycle seriously harms the global ecological environment; second, most current plastic products are derived from petroleum Resources. Therefore, it is imperative to develop materials that can replace plastics, can be recycled, are environmentally friendly, and have biodegradable properties. [0003] In the packaging field, plastic is t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L29/04C08K5/053C08K3/22C08K5/134C08K5/098C08K13/02C08J5/18
CPCC08J5/18C08J2329/04C08J2429/04C08K5/053C08K5/098C08K5/1345C08K13/02C08K2003/2224
Inventor 常江
Owner BEIJING YISIDE LOGISTICS TECH