Composite for waterproof breathable film and preparation method of composite

A technology of waterproof breathable membrane and composite material, which is applied in the field of composite materials for waterproof breathable membrane and its preparation, which can solve the problems of pinholes and holes in the breathable membrane, reduce production cost, improve melt strength, and simple preparation process Effect

Inactive Publication Date: 2019-04-05
HEFEI GENIUS NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Various breathable film manufacturers are working on research and development to speed up the work, but basically all of them end up with pinholes and holes when the breathable film is stretched at high speed.

Method used

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  • Composite for waterproof breathable film and preparation method of composite
  • Composite for waterproof breathable film and preparation method of composite
  • Composite for waterproof breathable film and preparation method of composite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Take raw materials by components and proportioning ratio (parts by weight) in Table 1;

[0025] (2) Mix in a high mixer for 5 minutes, mix the above-mentioned raw materials evenly, extrude the mixed blend through a twin-screw extruder to granulate, and the temperature of each zone of the extruder is sequentially from the feeding section to the head temperature 150°C, 170°C, 175°C, 175°C, 175°C, 180°C, 180°C, 180°C, 180°C, 185°C, the length-to-diameter ratio of the extrusion screw is 40, and the rotation speed of the extrusion screw is 350 rpm.

Embodiment 2

[0027] (1) Take raw materials by components and proportioning ratio (parts by weight) in Table 1;

[0028] (2) Mix in a high mixer for 10 minutes, mix the above-mentioned raw materials evenly, extrude the mixed blend through a twin-screw extruder to granulate, and the temperature of each zone of the extruder is sequentially from the feeding section to the head temperature 170°C, 185°C, 185°C, 185°C, 185°C, 190°C, 195°C, 195°C, 195°C, 200°C, the aspect ratio of the extrusion screw is 36, and the rotation speed of the extrusion screw is 350 rpm.

Embodiment 3

[0030] (1) Take raw materials by components and proportioning ratio (parts by weight) in Table 1;

[0031] (2) Mix in a high mixer for 15 minutes, mix the above-mentioned raw materials evenly, extrude the mixed blend through a twin-screw extruder to granulate, and the temperature of each zone of the extruder is sequentially from the feeding section to the head temperature 150°C, 170°C, 175°C, 175°C, 175°C, 180°C, 180°C, 180°C, 180°C, 195°C, the length-to-diameter ratio of the extrusion screw is 40, and the rotation speed of the extrusion screw is 350 rpm.

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Abstract

The invention discloses a composite for waterproof breathable film and a preparation method of the composite. The composite for the waterproof breathable film is prepared from 29-49 parts of metallocene polyethylene, 3-8 parts of high pressure polyethylene, 45-55 parts of inorganic fillers, 3-8 parts of reinforcing agents, 0.1-1 part of antioxidant, 0.5-1 part of lubricant and 0.2-1 part of coupling agents by mixing, extruding and granulating. The reinforcing agent added can effectively improve melt strength of the composite and the composite is not easy to be broken when being pulled, so thatproduction efficiency of cast film can be increased greatly, particularly, the production rate can be up to 150-180 meter / minute, and compared with the conventional production rate of 80-120 meter / minute, the production efficiency is increased by 50%. The preparation method of the composite is simple and low in price, and capable of effectively reducing production cost of the cast film.

Description

technical field [0001] The invention belongs to the field of polymer modified materials, in particular to a composite material for a waterproof breathable membrane and a preparation method thereof. Background technique [0002] Waterproof and breathable membranes are commonly used consumer products in daily life. For example, waterproof and breathable membranes can be made into linings, plastic paper, packaging bags, diapers, diapers, bandages, sanitary napkins, surgical drapes, etc. [0003] Those skilled in the art know that a waterproof and breathable membrane can be prepared by mixing thermoplastic polymers with fillers, and then stretching the breathable membrane so that voids are formed near filler particles to achieve breathability. [0004] With the increase of labor costs and various cost pressures in recent years, cost reduction has become an important method for various manufacturers to maintain or increase profits. At present, the production efficiency of ordina...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08K13/02C08K3/26C08K5/134C08K5/526C08K5/098C08J5/18
CPCC08J5/18C08J2323/06C08J2423/06C08K5/098C08K5/1345C08K5/526C08K13/02C08K2003/265C08K2201/003
Inventor 杨桂生廖雄兵姚晨光邵灵芝
Owner HEFEI GENIUS NEW MATERIALS
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