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A kind of hot water soluble polyvinyl alcohol film and its preparation method and application

A technology of polyvinyl alcohol film and polyvinyl alcohol, applied in the field of hot water soluble polyvinyl alcohol film and its preparation, can solve the problems of few, poor thermoplastic processing performance, etc., and achieve the effect of wide source of raw materials

Active Publication Date: 2021-02-12
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its extremely poor thermoplastic processing performance, it is rarely used as a thermoplastic for processing and molding.

Method used

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  • A kind of hot water soluble polyvinyl alcohol film and its preparation method and application
  • A kind of hot water soluble polyvinyl alcohol film and its preparation method and application
  • A kind of hot water soluble polyvinyl alcohol film and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044]The components of a hot-water-soluble shopping bag are calculated in parts by weight and include the following:

[0045]

[0046]The above components are accurately measured and added to a high-speed mixer, mixed at a low speed (100 rpm) for 3 minutes; then start high-speed (800 rpm) stirring to maintain high-speed stirring for 20 minutes, and control the material temperature to not exceed 80°C. Then switch to low-speed cooling and discharge for standby.

[0047]The above-mentioned raw materials after high-speed stirring and mixing enter the twin-screw extrusion granulation. The temperature control of its extrusion granulation: 120℃ / 140℃ / 150℃ / 160℃ / 170℃ / 180℃ / 180℃ / 180℃ / 180℃ / 180℃.

[0048]The raw material after the above extrusion granulation is then blown into a film by an extrusion blown film machine, and the blown film temperature is controlled as follows: 140°C / 160°C / 180°C / 185°C / 185°C / 180°C.

[0049]After thermoplastic extrusion blow molding into a film, the bag machine is used to prepare a...

Embodiment 2

[0051]The components of a hot-water-soluble shopping bag are calculated in parts by weight and include the following:

[0052]

[0053]The above components are accurately metered and added to a high-speed mixer, mixed at low speed (300 rpm) for 5 minutes; then start high-speed (1200 rpm) stirring to maintain high-speed stirring for 20 minutes, and control the material temperature to not exceed 80°C. Then switch to low-speed cooling and discharge for standby.

[0054]The above-mentioned raw materials after high-speed stirring and mixing enter the twin-screw extrusion granulation. The temperature control of its extrusion granulation: 120℃ / 140℃ / 150℃ / 160℃ / 170℃ / 180℃ / 180℃ / 180℃ / 180℃ / 180℃.

[0055]The raw material after the above extrusion granulation is then blown into a film by an extrusion blown film machine, and the blown film temperature is controlled as follows: 140°C / 160°C / 180°C / 185°C / 185°C / 180°C.

[0056]After thermoplastic extrusion blow molding into a film, the bag machine is then used to prepar...

Embodiment 3

[0058]The components of a hot-water-soluble shopping bag are calculated in parts by weight and include the following:

[0059]

[0060]The above components are accurately measured and added to a high-speed mixer, mixed at low speed (200 rpm) for 4 minutes; then start high-speed (1000 rpm) stirring and keep high-speed stirring for 20 minutes, and control the material temperature not to exceed 80°C. Then switch to low-speed cooling and discharge for standby.

[0061]The above-mentioned raw materials after high-speed stirring and mixing enter the twin-screw extrusion granulation. The temperature control of its extrusion granulation: 120℃ / 140℃ / 150℃ / 160℃ / 170℃ / 180℃ / 180℃ / 180℃ / 180℃ / 180℃.

[0062]The raw material after the above extrusion granulation is then blown into a film by an extrusion blown film machine, and the blown film temperature is controlled as follows: 140°C / 160°C / 180°C / 185°C / 185°C / 180°C.

[0063]After thermoplastic extrusion blow molding into a film, the bag machine is used to prepare a fla...

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Abstract

The invention discloses a hot water soluble polyvinyl alcohol film and its preparation method and application. The hot water soluble polyvinyl alcohol film comprises the following components in parts by mass: 100 parts of polyvinyl alcohol, 5-15 parts of ethylenediamine / propylene oxide polyether, 10-20 parts of ethylene oxide / propylene oxide copolyether, compound 10-30 parts of polyol, 3-5 parts of anti-blocking agent, 0.5-2.0 parts of anti-blocking agent. After the raw material components are measured according to the formula, they are mixed by a high-speed mixer, and then the material is extruded and granulated by a twin-screw, and then blown into a film by extrusion blown film method, and then prepared into various types by a bag making machine. And specifications of water-soluble shopping bags. The hot water soluble shopping bag has high load-bearing capacity and hot water solubility, and its hot water solubility can be designed and adjusted according to the raw material formula; it is suitable for use in an anhydrous environment, and it will "disappear" when it meets hot water after use " without pollution.

Description

Technical field[0001]The invention relates to an environment-friendly polyvinyl alcohol film, in particular to a hot water soluble polyvinyl alcohol film, and a preparation method and application thereof.Background technique[0002]The shopping bags currently used in commercial shopping malls include plastic shopping bags made of general-purpose plastics, such as polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), etc.; use of plastic shopping bags While bringing convenience to customers, it also brings a lot of plastic waste to the natural environment. Because such plastic bags are difficult to degrade in the natural environment, they produce a large amount of white pollution in the natural environment, destroy the soil, pollute the water source and water quality, and give the natural The ecology causes serious harm. One type is a disposable biodegradable shopping bag produced with biodegradable materials, such as PLA, PBS, PBAT, etc. This type of shopping bag is biodegr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L29/04C08L71/02C08K13/02C08K3/34C08K3/36C08K5/20C08K5/17C08K5/098C08J5/18
CPCC08J5/18C08J2329/04C08J2429/04C08J2471/02C08K3/34C08K3/36C08K5/098C08K5/17C08K5/20C08K13/02
Inventor 崔跃飞
Owner SOUTH CHINA UNIV OF TECH