Multilayered co-extruded low-temperature polyolefin crosslinked heat shrinking film and preparation method thereof

A heat-shrinkable film and multi-layer co-extrusion technology, which is applied in the direction of chemical instruments and methods, layered products, flat products, etc., can solve the problems of inability to meet special packaging requirements, high film thickness, and small improvement in mechanical properties, and achieve maintenance Dimensional stability, low shrinkage temperature, and the effect of meeting packaging needs

Inactive Publication Date: 2018-09-11
ZHEJIANG ZHONGCHENG PACKING MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although it has a good shrinkage rate, its mechanical properties are less improved than ordinary heat shrinkable films, and cannot meet special packaging requirements
[0008] Chinese patent CN102149768A discloses a polymer cross-linked film, which has remarkable heat resistance, dimensional stability and heat-sealing properties, but its film thickness is too high

Method used

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  • Multilayered co-extruded low-temperature polyolefin crosslinked heat shrinking film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A multi-layer co-extruded low-temperature polyolefin cross-linked heat-shrinkable film, the heat-shrinkable film is composed of three layers of co-extruded and bonded films, namely an outer layer, a middle layer and an inner layer;

[0032] The outer layer is composed of FP120 of NOVA Chemicals with a mass fraction of 15%, Dow Chemical 2036 with a mass fraction of 81%, and ABPP905 of 4%.

[0033] The middle layer is composed of 97% Dow Chemical 2256, 3% oleic acid amide by weight percentage,

[0034] The inner layer has the same composition as the outer layer,

[0035] Wherein, the ratio of the thickness of the outer layer: the thickness of the middle layer: the thickness of the inner layer is 1:4:1.

[0036] A method for preparing a multilayer co-extruded low-temperature polyolefin cross-linked heat-shrinkable film, comprising the following steps:

[0037] (1) Extrusion molding: the raw materials of the outer layer, the middle layer, and the inner layer are mixed uni...

Embodiment 2

[0044] A multi-layer co-extruded low-temperature polyolefin cross-linked heat-shrinkable film, the low-temperature polyolefin heat-shrinkable cross-linked film is composed of three layers of co-extruded and bonded films, namely an outer layer, a middle layer and an inner layer;

[0045] The outer layer is composed of 40% Dow Chemical 2045, 56% Dow 4023, 4% ABPP905 by mass fraction,

[0046] The middle layer is composed of 47% Dow Chemical 2256 by weight, 50% Dow Chemical 4023 by weight, and 3% oleic acid amide,

[0047] The inner layer has the same composition as the outer layer,

[0048] Wherein, the ratio of the thickness of the outer layer: the thickness of the middle layer: the thickness of the inner layer is 1:4:1.

[0049] A film-making process of low-temperature crosslinked polyolefin heat-shrinkable film, comprising the following steps:

[0050] (1) Extrusion molding: the raw materials of the outer layer, the middle layer, and the inner layer are mixed uniformly by w...

Embodiment 3

[0057] A multi-layer co-extruded low-temperature polyolefin cross-linked heat-shrinkable film, the low-temperature polyolefin heat-shrinkable cross-linked film is composed of three layers of co-extruded and bonded films, namely an outer layer, a middle layer and an inner layer;

[0058] The outer layer is composed of 20% Yanshan Petrochemical 1I2A, 20% 2036, 4% ABPP906,

[0059] The middle layer is composed of 15% by weight of FP120 of NOVA Chemicals, 82% of Shanghai Petrochemical 2426H, and 3% of silicone,

[0060] The inner layer has the same composition as the outer layer,

[0061] Wherein, the ratio of the thickness of the outer layer: the thickness of the middle layer: the thickness of the inner layer is 1:6:1.

[0062] A method for preparing a multilayer co-extruded low-temperature polyolefin cross-linked heat-shrinkable film, comprising the following steps:

[0063] (1) Extrusion molding: Mix the three layers of raw materials evenly according to the weight percentage,...

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Abstract

The invention relates to a multilayered co-extruded low-temperature polyolefin crosslinked heat shrinking film and a preparation method thereof. The heat shrinking film is composed of films in an outer layer, a middle layer and an inner layer which are co-extruded and adhered, wherein the thickness of the heat shrinking film is 10-40[mu]m, and the thickness ratio of the outer layer to the middle layer to the inner layer is 1: (3-10): 1. The film is prepared by carrying out extrusion forming, radiative crosslinking, cooling, bidirectional synchro-drawing, air ring cooling and post treatment onraw materials. The film not only has the characteristics of a crosslinked product, but also keeps excellent sealing property and low-temperature shrinking property, has the special properties of puncture resistance, high-temperature resistance, friction resistance, slack resistance and the like of the crosslinked film, and keeps the heat sealing property and the spatial stability. The film can beapplied to high-temperature environmental stretching films and shrinking films, and meanwhile, has a low shrinking temperature and can meet the packaging demand on temperature sensitive packaging materials.

Description

technical field [0001] The invention relates to a heat-shrinkable packaging film, in particular to a multi-layer co-extruded low-temperature polyolefin cross-linked heat-shrinkable film and a preparation method thereof. Background technique [0002] With the continuous development of economy and society, environmental protection and resource issues have become the focus of modern human beings. Traditional wood packaging, glass packaging, paper packaging, metal packaging and fabric packaging have gradually become increasingly popular due to their non-recyclability, non-biodegradability, waste of non-renewable resources, resistance to extrusion, resistance to moisture and moisture, and environmental pollution. eliminated and replaced. At present, the heat-shrinkable packaging film (POF) film produced by composite extrusion and biaxial stretching process using polyolefin as raw material has become gradually New environmentally friendly packaging materials that replace traditi...

Claims

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Application Information

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IPC IPC(8): B65D65/40B32B27/06B32B27/18B32B27/32B29D7/01
CPCB65D65/40B29D7/01B32B27/08B32B27/18B32B27/32B32B2250/242B32B2307/306B32B2307/31B32B2307/554B32B2307/736B32B2553/00
Inventor 陈大魁陈健黄旭生詹越强曹渊源
Owner ZHEJIANG ZHONGCHENG PACKING MATERIAL
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