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A waterproof and breathable cast film composite material and its preparation method

A composite material and airflow technology, which is applied in the field of waterproof and breathable cast film composite materials and its preparation, can solve the problems of complex production process, high cost, harsh material selection, etc., and achieve the effect of simple production process, low cost and light texture

Active Publication Date: 2021-04-09
合肥纳仕捷新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Patent No. CN105268013A provides a breathable and waterproof casting film material, using high-pressure polyethylene, low-pressure polyethylene, linear polyethylene, metallocene, polypropylene and additives to blend, the casting film obtained is relatively soft, but the puncture resistance , air permeability needs to be improved
[0006] Patent No. CN 1668689A provides a breathable film, although it has relatively good breathability, but the complex production process, harsh material selection and high cost limit its use

Method used

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  • A waterproof and breathable cast film composite material and its preparation method
  • A waterproof and breathable cast film composite material and its preparation method
  • A waterproof and breathable cast film composite material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Take the raw materials by weighing the components and proportioning ratio (parts by weight) in Table 1

[0024] Mix in a high mixer for 5 minutes, mix the above raw materials evenly, and extrude the mixed blend through a twin-screw extruder to granulate. The temperature of each zone of the extruder is 150°C from the feeding section to the head. . The prepared mixture was subjected to a performance test, and the test results are shown in Table 2.

Embodiment 2

[0026] Take the raw materials by weighing the components and proportioning ratio (parts by weight) in Table 1

[0027] Mix in a high mixer for 10 minutes, mix the above raw materials evenly, and extrude the mixed blend through a twin-screw extruder to granulate. The temperature of each zone of the extruder is 170°C from the feeding section to the head. . The prepared mixture was subjected to a performance test, and the test results are shown in Table 2.

Embodiment 3

[0029] Take the raw materials by weighing the components and proportioning ratio (parts by weight) in Table 1

[0030] Mix in a high mixer for 15 minutes, mix the above raw materials evenly, and extrude the mixed blend through a twin-screw extruder to granulate. The temperature of each zone of the extruder is 150°C from the feeding section to the die head. . The prepared mixture was subjected to a performance test, and the test results are shown in Table 2.

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Abstract

The invention discloses a waterproof and breathable casting film composite material and a preparation method thereof, which is prepared from the following components in parts by weight: 42-47 parts of metallocene polyethylene, 3-8 parts of high-pressure polyethylene, and 45-55 parts of inorganic filler 0.1-1 part of antioxidant, 0.5-1 part of lubricant and 0.2-1 part of coupling agent are prepared by mixing, extruding and granulating. The preparation process of the present invention is simple and the cost is low. The prepared waterproof and breathable cast film composite material is combined with the cast film processing technology, and it is easier to produce a cast film with waterproof and breathable functions, and the produced cast film is light and thin, Soft touch, high tensile strength, good puncture resistance; and the casting film made of this composite material has a high water vapor transmission rate, exceeding 2000g / ㎡ / 24h; it is suitable as the back material of diapers, sanitary napkins, etc. It can not only improve the user's comfort but also ensure breathability.

Description

technical field [0001] The invention relates to the technical field of modified materials, in particular to a waterproof and breathable cast film composite material 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] The application number is CN201120300754, which provides a composite breathable membrane, mainly structural design, which uses drywall paper instead of non-woven fabric and composites with waterproof breathable membrane, which im...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/06C08K13/02C08K3/26C08K5/098C08K5/544C08K5/20B29C48/92
CPCB29C48/92B29C2948/92704C08J5/18C08J2323/06C08K2201/003C08L23/06C08L2203/16C08L2205/025C08K13/02C08K2003/265C08K5/098C08K5/544C08K5/20
Inventor 杨桂生廖雄兵朱敏计娉婷
Owner 合肥纳仕捷新能源科技有限公司
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