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High-strength normal-temperature-insoluble PVA shopping bag

A shopping bag and high-strength technology, which is applied in the field of high-strength insoluble PVA shopping bags at room temperature, can solve the problems of poor water resistance and cannot be hydrolyzed quickly, achieve good water resistance and mechanical properties, and ensure the effect of green environmental protection.

Active Publication Date: 2021-04-20
常州绿之源高分子材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems existing in the prior art, the technical problem to be solved by the present invention is: traditional PVA shopping bags have poor water resistance at room temperature and cannot be hydrolyzed quickly after use.

Method used

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  • High-strength normal-temperature-insoluble PVA shopping bag
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Put 100 parts by weight of PVA into a high-speed mixer, stir and heat up to 70°C, and slowly add 8 parts by weight of 1,2,7-heptanetriol;

[0034] (2) Stir at low speed for 120 minutes, and control the temperature at 80°C until PVA fully absorbs 1,2,7-heptanetriol;

[0035] (3) Add 0.1 parts by weight of smooth opening agent and 1 part by weight of anti-adhesive agent and mix well;

[0036] (4) The uniformly mixed material is extruded and granulated by a twin-screw extruder. ℃ / 180℃ / 180℃, and then blown into a film by a thermoplastic extrusion blown film machine. The temperature of blown film is 140℃ / 160℃ / 180℃ / 185℃ / 185℃ / 180℃, and then the Machine prepared PVA shopping bags with a thickness of 10 μm.

Embodiment 2

[0038] (1) Put 100 parts by weight of PVA into a high-speed mixer, stir and heat up to 75°C, and slowly add 12 parts by weight of 1,2,7-heptanetriol;

[0039] (2) Stir at low speed for 80 minutes, and control the temperature at 90°C until PVA fully absorbs 1,2,7-heptanetriol;

[0040] (3) Add 0.3 parts by weight of smooth opening agent and 1.5 parts by weight of anti-adhesive agent and mix well;

[0041] (4) The uniformly mixed material is extruded and granulated by a twin-screw extruder. ℃ / 180℃ / 180℃, and then blown into a film by a thermoplastic extrusion blown film machine. The temperature of blown film is 140℃ / 160℃ / 180℃ / 185℃ / 185℃ / 180℃, and then the Machine prepared PVA shopping bags with a thickness of 40 μm.

Embodiment 3

[0043] (1) Put 100 parts by weight of PVA into a high-speed mixer, stir and heat up to 80°C, and slowly add 15 parts by weight of 1,2,7-heptanetriol;

[0044] (2) Stir at low speed for 50 minutes, and control the temperature at 100°C until PVA fully absorbs 1,2,7-heptanetriol;

[0045] (3) Add 0.5 parts by weight of smooth opening agent and 2 parts by weight of anti-sticking agent and mix well;

[0046] (4) The uniformly mixed material is extruded and granulated by a twin-screw extruder. ℃ / 180℃ / 180℃, and then blown into a film by a thermoplastic extrusion blown film machine. The temperature of blown film is 140℃ / 160℃ / 180℃ / 185℃ / 185℃ / 180℃, and then the Machine prepared PVA shopping bags with a thickness of 80 μm.

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Abstract

The invention relates to the technical field of environment-friendly shopping bags, in particular to a high-strength normal-temperature-insoluble PVA shopping bag. A traditional PVA shopping bag is poor in normal-temperature water resistance and cannot be quickly hydrolyzed after being used. Directed at the above problems, the invention provides the high-strength normal-temperature-insoluble PVA shopping bag. According to the invention, 1,2,7-heptanetriol is used as a plasticizer to replace traditional glycerol or ethylene glycol, so the prepared PVA shopping bag has better water resistance and mechanical properties at normal temperature and can be quickly hydrolyzed in an aqueous solution with a temperature of 50 DEG C or above; and thus, the green and environment-friendly properties of the shopping bag in use are ensured, and good development prospects are realized.

Description

technical field [0001] The invention relates to the technical field of environmental protection shopping bags, in particular to a high-strength normal-temperature insoluble PVA shopping bag. Background technique [0002] Polyvinyl alcohol (PVA) is a biodegradable material. Some bacteria or fungi in nature can cause damage to its structure, split or oxidize it. The final degraded products are water and carbon dioxide, zero pollution, and it is cheap and easy. It is considered to be one of the most promising biodegradable materials. [0003] The molecular chain of PVA contains a large number of hydroxyl groups, and a large number of hydrogen bonds are formed in the molecular chain and between the molecular chains, which makes the melting point of PVA close to its decomposition temperature, making it difficult for PVA to be thermoplastically processed, which limits PVA to a large extent. The development and application of pure PVA material itself is very brittle, and plasticiz...

Claims

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Application Information

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IPC IPC(8): C08L29/04C08K5/053C08K5/09C08K5/20C08K3/34C08K3/26C08K7/26C08K3/22C08J5/18
Inventor 褚鹏飞
Owner 常州绿之源高分子材料有限公司
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