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Micro-ventilating membrane with air permeability changed with temperature and application for micro-ventilating membrane

A micro-breathable film and temperature-dependent technology, applied in contraceptives, chemical instruments and methods, heating appliances for therapeutic treatment, etc., to achieve the effect of expanding the application range and improving performance

Inactive Publication Date: 2012-11-14
SHANGHAI WARMYOU IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the current products cannot meet the requirements and need to be improved

Method used

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  • Micro-ventilating membrane with air permeability changed with temperature and application for micro-ventilating membrane
  • Micro-ventilating membrane with air permeability changed with temperature and application for micro-ventilating membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Material of base fabric 1: polyester spunlace (100g / m 2 );

[0022] The material of the control layer 2: paraffin wax with a melting point of 40°C;

[0023] Preparation:

[0024] The paraffin wax is heated and melted, and then coated on the base cloth 1 by spraying to a thickness of 0.3 mm, and cooled to obtain the micro-breathable film whose air permeability varies with temperature.

[0025] Using the method specified by Wangyan air permeability, Japanese industrial standard, JIS P 8117, for testing, see the results figure 2 .

[0026] The above experimental data show that when the temperature is lower than the melting point of paraffin, the air permeability value of the membrane is small, which means that the air permeability is large and stable. When the temperature is higher than the melting point of paraffin, the air permeability value of the membrane increases sharply, that is, the permeability becomes smaller. Therefore, the present invention can manufactur...

Embodiment 2

[0029] Material of base fabric 1: polyester spunlace (100g / m 2 ); the material of the control layer 2: paraffin wax with a melting point of 60°C;

[0030] The paraffin wax is heated and melted, and then sprayed on the polyester spunlace cloth with a coating thickness of 0.2 mm; then cooled to obtain the micro-breathable film whose air permeability changes with temperature. Using the method specified by Wang Yan's air permeability, Japanese industrial standard, JIS P8117, for testing, see the results figure 2 .

[0031] The definition of air permeability of Wangyan type: 100ml of air is driven by 0.01276 atmospheric pressure and passes through the section of the membrane to be tested at 6.424cm 2 The time required in seconds.

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Abstract

The invention discloses a micro-ventilating membrane with air permeability changed with a temperature and an application for the micro-ventilating membrane. The micro-ventilating membrane comprises a base cloth and a control layer covering at one side of the base cloth; and the material of the control layer is paraffin wax, bee wax or polyethylene wax with a smelting point of 40-68 DEG C. The micro-ventilating membrane with the air permeability changed with the temperature can be used for preparing a spontaneous-heating heat-preservation paste. The micro-ventilating membrane has the advantages that: air permeability is extremely great at a low temperature; and after the temperature is higher than a specific temperature (more than 68 DEG C), the air permeability is rapidly reduced. According to the micro-ventilating membrane with the air permeability changed with the temperature and the application for the micro-ventilating membrane, change of the air permeability can be randomly adjusted through adjusting the smelting point of the paraffin wax, so as to achieve any temperature in the temperature range. A performance of the spontaneous-heating heat-preservation paste is greatly improved and a application range of the spontaneous-heating heat-preservation paste is enlarged.

Description

technical field [0001] The invention relates to a micro-breathable film, in particular to a micro-breathable film used for self-heating and thermal insulation stickers. Background technique [0002] The heating element with the mechanism of oxidation of reduced iron powder covered by a breathable film, such as the self-heating thermal paste sold on the market, commonly known as warm baby, requires fast heating and long duration during use, but the temperature should be moderate, generally 40- 60°C, fast temperature rise, requires a high air permeability of the breathable membrane, and long duration, moderate continuous temperature requires that the air permeability of the breathable membrane should not be too high, so this is a contradiction between the two. [0003] At present, the latter requirement can only be met by lowering the heating speed requirement, but in many cases in practical applications, it is required to have a fast heating time, a long duration, and a moder...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/06B32B27/36B32B9/04A61F7/03
Inventor 孙经一汤小雄
Owner SHANGHAI WARMYOU IND CO LTD
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