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Oxidable biodegradable cross-linked polyhydrocarbon heat shrinkable film

A heat-shrinkable film and biodegradable technology, applied in the direction of chemical instruments and methods, lamination, layered products, etc., can solve the problems that cannot meet the needs of product packaging while it is hot

Pending Publication Date: 2020-12-15
上海森韦得实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current heat-shrinkable cross-linked film basically cannot meet the demand for hot packaging of products.

Method used

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  • Oxidable biodegradable cross-linked polyhydrocarbon heat shrinkable film
  • Oxidable biodegradable cross-linked polyhydrocarbon heat shrinkable film
  • Oxidable biodegradable cross-linked polyhydrocarbon heat shrinkable film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The heat-shrinkable film is composed of three layers of co-extruded and bonded film, namely the outer layer, the middle layer and the inner layer;

[0024] Weigh the raw materials of each layer according to the total raw materials, specifically, the raw materials of the first outer layer: 2.5% pp and 3% opening agent; the raw materials of the middle layer: 70% LLDPE, 5% LDPE and 3% slip agent; the raw materials of the second outer layer and The raw materials of the first outer layer are the same;

[0025] The production process includes the following steps:

[0026] (1) Extrusion molding: Mix the raw materials of the outer layer, middle layer and inner layer evenly according to the weight percentage, and send them to each single-screw extruder through each hopper. Extrude the parent piece through the die head; extrude the embryo tube by the flat extrusion down-blowing method, and the high polymer is in a molten state at this time;

[0027] (2) Radiation cross-linking:...

Embodiment 2

[0034] The heat-shrinkable film is composed of three layers of co-extruded and bonded film, namely the outer layer, the middle layer and the inner layer;

[0035] Weigh the raw materials of each layer according to the total raw materials, specifically, the first outer layer raw materials: 1.5%-5% pp and 2%-4% anti-blocking agent; the middle layer raw materials: 70%-85% LLDPE, 3%-10% LDPE and 2%-4% slippery agent; the raw material of the second outer layer is the same as that of the first outer layer, and the selection of each raw material is the same as the serial number 4 in the embodiment 1.

[0036] The production process includes the following steps:

[0037] (1) Extrusion molding: Mix the raw materials of the outer layer, middle layer and inner layer evenly according to the weight percentage, and send them to each single-screw extruder through each hopper. Extrude the parent piece through the die head; extrude the embryo tube by the flat extrusion down-blowing method, an...

Embodiment 3

[0042] The heat-shrinkable film is composed of three layers of co-extruded and bonded film, namely the outer layer, the middle layer and the inner layer;

[0043] Weigh the raw materials of each layer according to the total raw materials, specifically, the first outer layer raw materials: 1.5%-5% pp and 2%-4% anti-blocking agent; the middle layer raw materials: 70%-85% LLDPE, 3%-10% LDPE and 2%-4% smoothing agent; the raw material of the second outer layer is the same as that of the first outer layer, and the selection of each raw material is the same as the serial number 3 in the embodiment 1.

[0044] The production process includes the following steps:

[0045] (1) Extrusion molding: Mix the raw materials of the outer layer, the middle layer and the inner layer evenly according to the weight percentage, and send them to each single-screw extruder through each hopper. The temperature of the extruder is 190 ° C. Extrude the parent piece through the die head; extrude the embr...

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Abstract

The invention discloses an oxidable biodegradable cross-linked polyhydrocarbon heat shrinkable film. The preparation method of the oxidable biodegradable cross-linked polyhydrocarbon heat shrinkable film comprises the following steps: melting and extruding linear low-density polyethylene LLDPE, a slipping agent, ternary copolymerized polypropylene and an anti-blocking agent, carrying out electronbeam radiation cross-linking, performing blowing up, rolling and slitting to obtain a finished product; weighing raw materials of each layer according to the total raw materials, specifically, the rawmaterials of the first outer layer comprising 1.5%-5% of PP and 2%-4% of an anti-blocking agent, the middle layer being prepared from the following raw materials, by weight: 70%-85% of LLDPE, 3%-10%of LDPE and 2%-4% of slipping agent, and the second outer-layer raw material being the same as the first outer-layer raw material. The oxidative biodegradation time of the obtained film is 6-24 months. Through cooperation of the raw materials and an electron beam crosslinking process, the hot melting section performance of the heat shrinkable film is improved, and the heat shrinkable film has a wide market prospect.

Description

technical field [0001] The invention belongs to the technical field of heat-shrinkable films, in particular to an oxidatively biodegradable cross-linked polyhydrocarbon heat-shrinkable film. Background technique [0002] Multi-layer co-extruded cross-linked shrink film is a new type of biaxially stretched shrink film with high shrinkage rate developed on the basis of POF shrink film in recent years. It is a multi-layer co-extruded shrink film irradiated by high-voltage electron beams to cause cross-linking between molecules and transform the linear chain structure into a network structure, thereby changing the physical and mechanical properties of the product. In the production of cross-linked film, through different formula design and cross-linking degree control, products with different performance requirements can be produced, which are suitable for different packaging equipment and product packaging. Polyolefin anti-relaxation cross-linked heat shrinkable film is mainly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/32B32B27/08B32B27/18B32B37/15B32B38/00C08L23/08C08L23/14C08L23/12C08L23/06C08K5/20C08J5/18
CPCB32B27/32B32B27/08B32B27/18B32B37/153B32B38/0008B32B38/0036C08J5/18C08J2323/08C08J2423/06C08J2323/12C08J2423/14C08K5/20B32B2307/30B32B2307/558B32B2307/5825B32B2307/7163
Inventor 傅文光宋晓来
Owner 上海森韦得实业有限公司
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