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Microporous polyethylene breathable film and preparation method thereof

A microporous polyethylene, breathable film technology, applied in chemical instruments and methods, flat products, other household appliances, etc., can solve the problems of excessive scrap removal, poor adhesion of film ink, and high rejection rate to meet the needs of use. , The effect of good ink adhesion and high printing saturation

Active Publication Date: 2017-10-24
永新股份(黄山)包装有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1) Reduction is the current development direction of the global plastics industry. The minimum square gram weight limit of polyethylene microporous breathable film produced by casting method is 15gsm in the industry. Porous breathable film cannot be used for normal printing production due to its tendency to stretch and deform
[0004] 2) The household paper industry generally pursues products without plastic feeling, and develops in the direction of soft texture, which is closer to the real needs of consumers, but it is difficult to change and realize the casting method
[0005] 3) The physical and mechanical properties of the traditional polyethylene microporous air-permeable membrane decrease with the reduction of the square gram weight, and the film performance also decreases, resulting in the inability to produce many paper products, and the traditional polyethylene microporous air-permeable membrane is prone to deformation and being pulled Stretch phenomenon, leading to high scrap rate in the production process of enterprises
[0006] 4) At present, many products need to be printed on polyethylene microporous air-permeable film. Because of the poor adhesion of film ink produced by casting method, it is not possible to carry out multi-color accurate overprint production, and many products can only be printed in one color.
[0007] 5) Because the tape casting method is usually stretched twice and then formed, after the plastic film shrinks twice, there are many side materials to be removed, and the production consumption is too high

Method used

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  • Microporous polyethylene breathable film and preparation method thereof
  • Microporous polyethylene breathable film and preparation method thereof
  • Microporous polyethylene breathable film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Preparation of polyethylene microporous breathable film:

[0031] S1. Put the printing layer, middle layer and heat-sealing layer pellets into the barrel of the film blowing machine in proportion to melt and co-extrude, wherein the temperature of the melting section of the film blowing machine is 50°C, and the temperature of the extrusion section is 180°C. Die head temperature is 185°C, extrusion rate is 500kg / h;

[0032] The printing layer, the middle layer and the heat-sealing layer are all composed of calcium carbonate, metallocene linear low-density polyethylene and fluorine-containing processing aids, the calcium carbonate, metallocene linear low-density polyethylene and fluorine-containing processing aids The mass ratio is 65:35:0.5, and the particle diameter of the calcium carbonate is 1~2 μm;

[0033] The metallocene linear low density polyethylene is composed of a first metallocene linear low density polyethylene with a melt index of 2.9 and a second metalloce...

Embodiment 2

[0037] Preparation of polyethylene microporous breathable film:

[0038] S1. Put the printing layer, intermediate layer and heat-sealing layer pellets into the blown film machine barrel in proportion to melt and co-extrude, wherein the temperature of the melting section of the blown film machine is 60°C, and the temperature of the extrusion section is 190°C. Die head temperature is 195°C, extrusion rate is 600kg / h;

[0039] The printing layer, the middle layer and the heat-sealing layer are all composed of calcium carbonate, metallocene linear low-density polyethylene and fluorine-containing processing aids, the calcium carbonate, metallocene linear low-density polyethylene and fluorine-containing processing aids The mass ratio is 75:25:1.5, and the particle diameter of the calcium carbonate is 1~2 μm;

[0040] The metallocene linear low density polyethylene is composed of a first metallocene linear low density polyethylene with a melt index of 3.1 and a second metallocene li...

Embodiment 3

[0044] Preparation of polyethylene microporous breathable film:

[0045] S1. Put the printing layer, middle layer and heat-sealing layer pellets into the barrel of the blown film machine in proportion to melt and co-extrude, wherein the temperature of the melting section of the blown film machine is 55°C, and the temperature of the extrusion section is 185°C. The die head temperature is 190°C, and the extrusion rate is 550kg / h;

[0046] The printing layer, the middle layer and the heat-sealing layer are all composed of calcium carbonate, metallocene linear low-density polyethylene and fluorine-containing processing aids, the calcium carbonate, metallocene linear low-density polyethylene and fluorine-containing processing aids The mass ratio is 70:29:1, and the particle diameter of the calcium carbonate is 1-2 μm;

[0047] The metallocene linear low density polyethylene is composed of a first metallocene linear low density polyethylene with a melt index of 3 and a second metallo...

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Abstract

The invention relates to a microporous polyethylene breathable film and a preparation method thereof. The film is obtained by a coextrusion blow molding method, and comprises a printing layer, a middle layer and a heat-sealing layer, wherein each of the printing layer, the middle layer and the heat-sealing layer is prepared from calcium carbonate, metallocene linear low density polyethylene and a fluorine-containing processing agent with a mass ratio of (65 to 75):(25 to 35):(0.5 to 1.5), and the particle size of the calcium carbonate is 1 to 2 mu m. The microporous polyethylene breathable film has obvious advantages in indexes such as pulling strength, hydrostatic pressure and water vapor permeability, thus providing excellent technical guarantee for positioning, cutting and multi-colour printing chromatography of corresponding products; the gram weight of per unit area of the microporous polyethylene breathable film is light, thus plastic resin can be used less, energy consumption is greatly reduced, and carbon emission is reduced, thus providing guarantee for realizing lightness and emission reduction of one-off living sanitary articles.

Description

technical field [0001] The invention belongs to the field of film materials, and in particular relates to a microporous polyethylene breathable film and a preparation method thereof. Background technique [0002] At present, polyethylene microporous breathable film is widely used in the fields of household paper and medical protection, such as diaper products, sanitary napkin products, elderly incontinence pad products, protective clothing, etc., are widely used in polyethylene microporous breathable film. Polyethylene microporous breathable film is indispensable in today's social life. Because it has air permeability similar to cotton products and waterproof similar to plastic products, products using polyethylene microporous breathable film are comfortable and hygienic. , convenient, deeply loved by consumers. Almost 100% of the traditional polyethylene microporous breathable film in the domestic market is produced by casting method. The traditional polyethylene microporo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/18B32B27/32B32B3/24B29C47/06B29C47/92B29C69/02B29L7/00B29K23/00B29C48/92
CPCB29C48/0018B29C48/08B29C48/21B29C48/92B32B3/266B32B27/18B32B27/32B29K2023/06B29L2007/00B32B2264/104B32B2250/242B32B2307/546B32B2307/54B32B2307/726B32B2307/724B29C2948/92704
Inventor 胡鸿波潘健高淼汪飞曹斐
Owner 永新股份(黄山)包装有限公司
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