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Water resistible and breathable plastic film with drying function as well as preparation method and application thereof

A technology with waterproof, breathable and drying functions, applied in chemical instruments and methods, layered products, metal layered products, etc. Effective space saving effect

Inactive Publication Date: 2014-02-12
昆山威胜干燥剂研发中心有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In recent years, waterproof and breathable membranes have been widely used in various fields, mainly using nano-scale calcium carbonate as raw material, which has defects such as poor waterproof performance and inability to resist acid gases and liquids.
The desiccants currently used are all packaged with solid adsorbents and air-permeable packaging materials. The main defect is: enough space for the desiccant is required, and the production efficiency cannot be effectively improved.

Method used

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  • Water resistible and breathable plastic film with drying function as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1 Waterproof and breathable plastic film with drying function and its preparation

[0029] The preparation method of the waterproof breathable plastic film with drying function comprises the following steps:

[0030] 1) Mix polyethylene (PE) 1kg, thermoplastic elastomer (TPE) 1kg, adsorbent silica gel powder 1.5kg, auxiliary material polymer wax 0.1kg, extrude and granulate at 200°C to make plastic particles with dry and breathable function .

[0031] 2) Extrude and cast the above plastic particles at 200°C to form a plastic film or sheet with a thickness of 15-20S.

[0032] 3) Stretch the above-mentioned plastic film or sheet on a (two-way or one-way) stretching machine for 3-7 times the area to make a breathable plastic film with high waterproof performance.

Embodiment 2

[0033] Embodiment 2 Waterproof and breathable plastic film with drying function and its preparation

[0034] The preparation method of the waterproof breathable plastic film with drying function comprises the following steps:

[0035] 1) Mix 2kg of polypropylene (PP), 2kg of thermoplastic elastomer (TPE), 3kg of adsorbent montmorillonite and titanium dioxide, and 0.1kg of modified poly-p-phenylene terephthalamide (PPA), and mix them at 160 ℃Extrusion granulation to make plastic particles with dry and breathable function.

[0036] 2) Extrude and cast the above plastic particles at 160°C to make a plastic film or sheet with a thickness of 15-20S.

[0037] 3) Stretch the above plastic film or sheet by 5-6 times area on a (bidirectional or unidirectional) stretching machine to make a breathable plastic film with high waterproof performance.

Embodiment 3

[0038] Example 3 Waterproof and breathable plastic film with drying function and its preparation

[0039] The preparation method of the waterproof breathable plastic film with drying function comprises the following steps:

[0040] 1) Polyethylene (PE) 2kg, polypropylene (PP) 2kg, thermoplastic elastomer (TPE) 2kg, adsorbent montmorillonite, molecular sieve, calcium carbonate and titanium dioxide each 5kg, auxiliary materials polymer wax, modified polyparaffin Mix 0.1kg each of p-phenylenediamide phthalamide (PPA) and calcium stearate, extrude and granulate at 250°C to make plastic particles with dry and breathable function.

[0041] 2) Extrude and cast the above plastic particles at 250°C to make a plastic film or sheet with a thickness of 15-20S.

[0042] 3) Stretch the above-mentioned plastic film or sheet by 4-6 times area on a (two-way or one-way) stretching machine to make a breathable plastic film with high waterproof performance.

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PUM

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Abstract

The invention provides a water resistible and breathable plastic film with a drying function. The plastic film is prepared from the following raw materials in parts by weight: 40-80 parts of macromolecule plastic, 20-60 parts of an adsorbent and 1-5 parts of an auxiliary material, wherein the macromolecule plastic is at least one of polyethylene, polypropylene, thermoplastic elastomer and the like; the adsorbent is selected at least one of silica gel, montmorillonite, bentonite, molecular sieve, calcium carbonate, titanium dioxide and the like; the auxiliary material is selected from at least one of macromolecule wax, modified polyphthalamide, calcium stearate and the like. The plastic film adopts a plastic film (bidirectional or unidirectional) tension technique, and the adsorbent with the drying function is added into the raw material formula for manufacturing a water resistible and breathable film, so that a material has a certain moisture absorption function under the condition that the air permeability of the material is not affected.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a novel waterproof and breathable plastic film with drying function, its preparation method and application. Background technique [0002] With the development of the economy and the adjustment of the industrial structure, the market demand for plastic films in various industries continues to rise. Films made of polyvinyl chloride, polyethylene, polypropylene, polystyrene, and other resins used for packaging and as laminations. Plastic packaging and plastic packaging products are taking an increasing share in the market, especially composite plastic flexible packaging, which has been widely used in food, medicine, chemical and other fields, bringing great convenience to people's lives [0003] In recent years, waterproof and breathable membranes have been widely used in various fields, mainly using nano-scale calcium carbonate as raw material, which has defects such as poor wate...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08L23/12C08L101/12C08K3/34C08K3/26C08K3/22C08K5/098B29C69/00B32B27/12B32B27/18B32B27/32B32B27/06B32B15/085B32B15/04
CPCC08K2003/2241C08L23/06B29C69/00B32B15/04B32B15/085B32B27/06B32B27/12B32B27/18B32B27/32B32B2250/02B32B2307/7246C08J5/18C08J2300/26C08J2323/06C08J2323/12C08K3/346C08K5/098C08L23/12C08L101/00C08L2203/16C08L2205/03C08L2205/035C08L2207/04C08L91/06C08K3/36C08L77/10C08K13/02C08K3/34C08K2003/265
Inventor 沈飞
Owner 昆山威胜干燥剂研发中心有限公司
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