Processing method for high-efficiency polyester nonwoven thermal insulation material

A technology of polyester non-woven fabrics and thermal insulation materials, applied in the field of non-woven deep processing, can solve problems such as difficulties in large-scale production and application, difficulty in construction, mechanical defects, etc., achieve breakthroughs in technology and equipment bottlenecks, increase the ability of spontaneous drainage, The effect of improving the mechanical properties

Active Publication Date: 2013-03-13
福建鑫华股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods are difficult to ensure that the aerogel penetrates into the nonwoven fabric uniformly, and the combination with the fiber is poor, and it is difficult to build a stable airgel composite structure in the nonwoven fabric, that is, it is difficult for the aerogel to be in situ on the surface of the fiber inside the material. growth, so there will be mechanical defects and thermal defects
In addition, for large-area non-woven fabric sheets, the above-mentioned processing methods cannot meet the requirements of industrial continuous production and processing, and after the gel is aged to remove moisture to form airgel, organic solvent method or supercritical fluid method is often used Drying process also makes it difficult for large-scale production applications

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Processing method for high-efficiency polyester nonwoven thermal insulation material
  • Processing method for high-efficiency polyester nonwoven thermal insulation material
  • Processing method for high-efficiency polyester nonwoven thermal insulation material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 120g / m 2 , thick 1mm polyester staple fiber needle-punched nonwovens

[0034] (1) Preparation of tetraethyl orthosilicate sol working solution

[0035]

[0036]

[0037] Then, add 5% (volume fraction) of CF 3 CH 2 CH 2 OH, fully stirred evenly to obtain a sol treatment working solution.

[0038] (2) Aminolytic modification of polyester nonwoven fabric

[0039]

[0040] After dehydration, the liquid carrying rate is controlled to 75%; specifically, in this embodiment, the catalyst is sodium carbonate.

[0041] (3) Impregnated sol treatment working solution

[0042] The temperature of the working fluid is 30°C, and the liquid carrying rate is 200%. The scraper spacing is 1mm.

[0043] (4) Ladder drying conditions

[0044] 50℃×60min, 80℃×20min, 110℃×20min, 160℃×2min.

[0045] The performance of the thermal insulation material prepared by the above process is:

[0046] The average diameter of micropores in the airgel is 60nm; the thermal conductivity at ...

Embodiment 2

[0048] 180g / m 2 , 1.5mm thick polyester needle-punched nonwovens

[0049] (1) Preparation of tetraethyl orthosilicate sol working solution

[0050]

[0051] Then, add 7% (volume fraction) of CF 3 CH 2 CH 2 OH, fully stirred evenly to obtain a sol treatment working solution.

[0052] (2) Aminolytic modification of polyester nonwoven fabric

[0053]

[0054] After dehydration, the liquid carrying rate is controlled to 70%; in this embodiment, the catalyst used is sodium carbonate.

[0055] (3) Impregnated sol treatment working solution

[0056] The temperature of the working fluid is 35°C, and the liquid carrying rate is 180%. The scraper spacing is 1.5mm.

[0057] (4) Ladder drying conditions

[0058] 50℃×90min, 80℃×20min, 110℃×20min, 160℃×3min.

[0059] The performance of the thermal insulation material prepared by the above process is:

[0060] The average diameter of the micropores in the airgel is about 80nm; the thermal conductivity at normal temperature a...

Embodiment 3

[0062] 75g / m 2 , 0.75mm thick polyester melt-blown nonwovens

[0063] (1) Preparation of tetraethyl orthosilicate sol working solution

[0064]

[0065] Then, 5% (volume fraction) of CF3CH2CH2OH was added and stirred evenly to obtain a working solution for sol treatment.

[0066] (2) Aminolytic modification of polyester nonwoven fabric

[0067]

[0068] After dehydration, the liquid carrying rate is controlled at 70%.

[0069] (3) Impregnated sol treatment working solution

[0070] The temperature of the working fluid is 35°C, and the liquid carrying rate is 150%. The scraper spacing is 0.75mm.

[0071] (4) Ladder drying conditions

[0072] 50℃×45min, 80℃×15min, 110℃×15min, 160℃×2min.

[0073] The performance of the thermal insulation material prepared by the above process is:

[0074] The average diameter of the airgel is about 60nm; the thermal conductivity at normal temperature and pressure is lower than 0.038w / m k; the longitudinal breaking strength is 160N / 3...

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Abstract

The invention discloses a processing method for a high-efficiency polyester nonwoven thermal insulation material, comprising the following steps: (1) carrying out aminolysis modification treatment on a polyester nonwoven fabric, and dewatering to form into the polyester nonwoven fabric which is carried out by aminolysis and modification with 40%-80% of mangle expression; (2) putting the polyester nonwoven fabric which is carried out by aminolysis and modification with 40%-80% of mangle expression into sol working solution to carry out an impregnation technology; and (3) adding 5%-10% (volume fraction) of perfluorinated compound into the working solution of the impregnation technology to improve the spontaneous water discharge capability of a capillary tube when the gel formed by the impregnation technology is dried, replacing the self removal of the solvent by nonpolar solvent through solvent, and drying in the manner of stepped heating and drying to obtain the high-efficiency polyester nonwoven thermal insulation material. According to the processing method, due to the technical means of the in-situ gelation, the problem that the fiber and the gel cannot be completely combined and easy to have the mechanical defect can be overcome, and the mechanical property of the thermal insulation material can be improved.

Description

technical field [0001] The invention relates to the field of non-woven deep processing, and more specifically relates to a processing method of a high-efficiency polyester non-woven heat-insulating material. The non-woven material produced by the method can be applied to the heat-insulation technical requirements of automobile interiors and walls. Background technique [0002] With the continuous advancement of technology and rapid economic growth, the dependence of social development on energy has greatly increased, making the supply of energy resources increasingly tense. Therefore, materials characterized by energy saving and environmental protection are the focus of my country's development. In the civil field, more and more people use air conditioners to adjust the living and working environment, but when the air temperature is adjusted, due to the effects of solid heat conduction, convective heat conduction and radiation heat conduction, it will quickly exchange heat wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/79D06M13/332D06M13/144D06M13/325D06M101/32
Inventor 姚金波王山英粘伟诚田雨胜牛家嵘
Owner 福建鑫华股份有限公司
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