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Degradable high-strength stretch film and preparation method thereof

A high-strength, stretch film technology, used in chemical instruments and methods, flat products, other household appliances, etc., can solve the problems of large amount of stretch film, waste and other problems, achieve reasonable ratio, reduce production costs, heat sealing high intensity effect

Inactive Publication Date: 2020-05-15
苏州汇能新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the huge amount of stretch film used, it is often discarded after one package and disassembled, resulting in a lot of waste and a lot of environmental pressure

Method used

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  • Degradable high-strength stretch film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The degradable high-strength stretch film components (by weight) include:

[0015] The first layer: 5 parts of LLDPE and MDPE, 0.8 part of PHBV, 0.2 part of silicone oil;

[0016] The second layer: 5 parts of LLDPE and LDPE, 0.8 part of PHBV, 0.2 part of silicone oil;

[0017] The third layer: 5 parts of LLDPE and MDPE, 0.8 part of PHBV, 0.2 part of silicone oil;

[0018] Preparation: adopt one-step co-extrusion casting molding, weigh LDPE, MDPE, LLDPE raw material particles and auxiliary materials according to the requirements of different weight ratios for each layer, mix them evenly, and dry at 150°C for 2 hours; after heating at 280°C, extruding Pressing, casting, and then cooling at 20°C with chilled rolls.

Embodiment 2

[0020] The degradable high-strength stretch film components (by weight) include:

[0021] The first layer: 8 parts of LLDPE and MDPE, 0.7 part of PHBV, 0.3 part of silicone oil;

[0022] The second layer: 3 parts of LLDPE and LDPE, 0.7 part of PHBV, 0.1 part of silicone oil;

[0023] The third layer: 4 parts of LLDPE and MDPE, 0.8 part of PHBV, 0.2 part of silicone oil;

[0024] Preparation: adopt one-step co-extrusion casting molding, weigh LDPE, MDPE, LLDPE raw material particles and auxiliary materials according to the requirements of different weight ratios for each layer, mix them evenly, and dry them at 150°C for 2 hours; after heating at 250°C, extruding Pressing, casting, and then cooling at 25°C with chilled rolls.

Embodiment 3

[0026] The degradable high-strength stretch film components (by weight) include:

[0027] The first layer: 6 parts of LLDPE and MDPE, 0.8 part of PHBV, 0.3 part of silicone oil;

[0028] The second layer: 5 parts of LLDPE and LDPE, 0.9 part of PHBV, 0.1 part of silicone oil;

[0029] The third layer: 6 parts of LLDPE and MDPE, 0.9 part of PHBV, 0.1 part of silicone oil;

[0030] Preparation: adopt one-step co-extrusion casting molding, weigh LDPE, MDPE, LLDPE raw material particles and auxiliary materials according to the requirements of different weight ratios for each layer, mix them evenly, and dry at 150°C for 2 hours; after heating at 270°C, extruding It is formed by pressing, casting, and cooling at 30°C by a chill roll.

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Abstract

The invention discloses a degradable high-strength stretch film. The degradable high-strength stretch film is characterized in that the degradable high-strength stretch film comprises a first layer, asecond layer and a third layer, wherein the first layer is prepared by mixing PE and an auxiliary material according to a weight part ratio of (5-8):1, the second layer is prepared by mixing PE and PHBV according to a weight part ratio of (3-5):1, the third layer is prepared by mixing PE with the auxiliary material according to a weight part ratio of (4-6):1, PE is one or a combination of more than one of LDPE, MDPE and LLDPE, the auxiliary material comprises one or a combination of two of biodegradable auxiliary materials PHBV and Ecoflex, the biodegradable auxiliary material accounts for 80% or above of the weight part ratio, and the first layer, the second layer and the third layer are compounded through co-extrusion tape casting to form the stretch film. The stretch film is biodegradable, can be formed at one time, can be continuously produced, and is high in efficiency, the minimum thickness of the produced film can reach 15 [mu]m, the production cost is effectively reduced, andthe price advantage is obvious.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a degradable high-strength tensile film. Background technique [0002] Stretch film, also known as stretch film and heat shrinkable film, was the first in China to produce PVC stretch film with PVC as the base material and DOA as the plasticizer and self-adhesive function. When PE stretch film was produced in China from 1994 to 1995, it was gradually eliminated. Due to its excellent tensile properties, PE stretch film has been widely used in many application fields. At present, stretch film is mainly used in conjunction with pallets to package scattered goods as a whole, instead of small containers. Because it can reduce the cost of bulk cargo transportation and packaging by more than 30%, it is widely used in the packaging of various products such as hardware, minerals, chemicals, medicine, food, machinery, etc. In the field of storage, foreign countries also use more...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/32B32B27/06B32B27/18B32B33/00C08L23/08C08L23/06C08L67/04C08L83/04B29D7/01
CPCB29D7/01B32B27/08B32B27/18B32B27/32B32B33/00B32B2307/31B32B2307/409B32B2307/552B32B2307/7163C08L23/06C08L23/0815C08L2201/06C08L2205/035C08L2207/066C08L67/04C08L83/04
Inventor 钱志华唐思亮
Owner 苏州汇能新材料有限公司
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