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Environment-friendly water-soluble polyvinyl alcohol packaging film and preparation method thereof

A polyvinyl alcohol and packaging film technology, applied in the field of packaging materials, can solve the problems of poor solubility, long water dissolution time, poor tensile strength, etc. The effect of good mechanical properties

Inactive Publication Date: 2017-12-12
GUANGDONG PROVINCIAL BIOENGINEERING INST (GUANGZHOU SUGARCANE IND RES INST)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, problems such as air bubbles and uneven thickness will occur in the production of the existing water-soluble film, the tensile strength is poor, the solubility is not very good, the water dissolving time is long, and some pollution will still occur, which directly limit the water-soluble polyvinyl alcohol. Film application

Method used

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  • Environment-friendly water-soluble polyvinyl alcohol packaging film and preparation method thereof
  • Environment-friendly water-soluble polyvinyl alcohol packaging film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Dissolve 6 g of oxidized starch in 200 mL of distilled water, then add 6 g of glycerin / polyglycerin (mass ratio 1:1), 0.9 g of sodium lauryl ether sulfate, 0.7 g of amino silicone oil emulsion, polyvinyl alcohol resin PVA1788 (Sichuan Vinylon Plant) 24g, gelatin 1.5g, stir at 100 rpm, dissolve at 90°C for 3h to make PVA aqueous solution, maintain the temperature at 80°C, let the solution stand for defoaming for 1-2h. Then cast the solution with all bubbles removed onto a preheated stainless steel plate, place it in a blast oven at 85°C to dry for about 0.5h, take it out, cool it, peel off the film, and place it in a room with a temperature of 25°C and a relative humidity of 45%. Equilibrate at room temperature in a constant temperature and humidity box for 24 hours to obtain an environmentally friendly water-soluble polyvinyl alcohol packaging film.

Embodiment 2

[0037] Dissolve 4.8g of oxidized starch in 136mL of distilled water, then sequentially add 6g of glycerin / polyethylene glycol 200 (mass ratio 1:1), 0.9g of sodium lauryl ether sulfate, 0.7g of amino silicone oil emulsion, polyvinyl alcohol resin PVA1788 (Sichuan Vinylon Factory) 24g, gelatin 1.5g, stir at 100 rpm, dissolve at 90°C for 3h, make PVA aqueous solution, maintain the temperature at 80°C, let the solution stand for defoaming, time 1-2h . Then cast the solution with all bubbles removed onto a preheated stainless steel plate, place it in a blast oven at 85°C to dry for about 0.5h, take it out, cool it, peel off the film, and place it in a room with a temperature of 25°C and a relative humidity of 45%. Equilibrate at room temperature in a constant temperature and humidity box for 24 hours to obtain an environmentally friendly water-soluble polyvinyl alcohol packaging film.

Embodiment 3

[0039] Dissolve 6g of oxidized starch in 200mL of distilled water, then add 6g of glycerin / diethylene glycol (mass ratio 1:1), 0.9g of sodium lauryl ether sulfate, 0.7g of amino silicone oil emulsion, polyvinyl alcohol resin PVA1788 (Sichuan Vinylon Factory) 24g, gelatin 1.5g, stir at 100 rpm, dissolve at 90°C for 3h, make PVA aqueous solution, maintain the temperature at 80°C, let the solution stand for defoaming, time 1-2h . Then cast the solution with all bubbles removed onto a preheated stainless steel plate, place it in a blast oven at 85°C to dry for about 0.5h, take it out, cool it, peel off the film, and place it in a room with a temperature of 25°C and a relative humidity of 45%. Equilibrate at room temperature in a constant temperature and humidity box for 24 hours to obtain an environmentally friendly water-soluble polyvinyl alcohol packaging film.

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Abstract

The invention belongs to the technical field of packaging materials and discloses an environment-friendly water-soluble polyvinyl alcohol packaging film and a preparation method thereof. The packaging film is prepared from the following components in parts by weight: 100 parts of polyvinyl alcohol resin, 5-30 parts of oxidized starch, 5-30 parts of a plasticizer, 1-10 parts of an enhancer, 1-3 parts of a surfactant and 0.05-2 parts of a defoaming agent, wherein the plasticizer is a compound plasticizer which is prepared by compounding glycerin with other plasticizers and contains at least one combination of glycerin / polyglycerin, glycerin / polyethylene glycol 200, glycerin / polyethylene glycol 400, glycerin / polyethylene glycol 600, glycerin / diethylene glycol and glycerin / triethylene glycol. The packaging film can be rapidly completely dissolved into water at the room temperature, is transparent, colorless and toxic-free after being dissolved, is biodegradable, has excellent mechanical properties and can be applied to water-soluble product packages such as pesticides, detergents and water treatment agents.

Description

technical field [0001] The invention belongs to the technical field of packaging materials, and in particular relates to an environment-friendly water-soluble polyvinyl alcohol packaging film and a preparation method thereof. Background technique [0002] With the improvement of people's living standards and environmental awareness, more and more attention is paid to the white pollution caused by the use of plastic packaging materials. Therefore, the requirements for green packaging materials in the packaging field are getting higher and higher, especially for some water-soluble product packaging. , such as pesticide packaging. Most farmers throw away the plastic bags, plastic bottles, glass bottles and other packaging that have used up pesticides. These pesticide packaging wastes will remain in the soil and are difficult to degrade, forming a barrier layer in the soil and affecting the growth and expansion of plant roots. , hindering the absorption of soil nutrients and wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L29/04C08L3/10C08L89/00C08L71/02C08K5/053C08K5/06C08J5/18B65D65/46
CPCB65D65/466C08J5/18C08J2329/04C08J2403/10C08J2489/00C08K2201/014C08L29/04C08L2201/06C08L2203/16C08L2205/035C08L3/10C08L89/00C08L71/02C08K5/053C08K5/06Y02W90/10
Inventor 李发勇陈明周谢东杨友军张会平沈华艳
Owner GUANGDONG PROVINCIAL BIOENGINEERING INST (GUANGZHOU SUGARCANE IND RES INST)
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