Fiber mat, preparation method and core material for vacuum thermal insulation plate

A fiber mat and glass fiber technology, which is applied in the field of new fiber mats, can solve the problems of disordered fiber structure, difficulty in obtaining lower thermal conductivity, and wide fiber size distribution.

Inactive Publication Date: 2013-09-18
FUJIAN SUPERTECH ADVANCED MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The average diameter of glass microfiber fibers is not more than 4 microns (the product is not more than 6 microns). Due to the wide distribution of fiber size, shape distortion, irregularity, etc., the fiber structure inside the core material is disordered and disordered, and the thermal conductivity is difficult to get lower.

Method used

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  • Fiber mat, preparation method and core material for vacuum thermal insulation plate
  • Fiber mat, preparation method and core material for vacuum thermal insulation plate
  • Fiber mat, preparation method and core material for vacuum thermal insulation plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Fiber felt of the present invention, its needle punching preparation process is as follows:

[0063] (1) 25Kg of glass fiber chopped strands (preferred length 75mm, fiber diameter 9μm), 3Kg of glass microfibers (average diameter not greater than 6 microns) and 280g of carbon black are weighed and batched, and put into a rough opener for Coarse opening, enter the fine opening machine through the cotton mixing box for fine opening, and then fully mix through the vibrating cotton box, etc., and send it to the carding machine for complete opening, uniform carding and distribution of fiber filaments;

[0064] (2) Afterwards, it is transferred to the net-laying machine for net-laying;

[0065] (3) Feed the laid out fiber web into the pre-needling machine and the main needling machine for needling and shaping. The needling density is 8-12 needles / cm2 to obtain the required fiber mat with a thickness of 5mm.

Embodiment 2

[0067] Fiber felt of the present invention, its needle punching preparation process is as follows:

[0068] (1) 50Kg of glass fiber chopped strands (preferred length 50mm, fiber diameter 13μm), glass microfibers (average diameter not greater than 6 microns) 5Kg and polyester fiber (1.8tex, 38mm) 1Kg after weighing and batching, Put it into the rough opener for rough opening, enter the fine opener through the mixing box for fine opening, and then fully mix through the vibrating cotton box, etc., and then send it to the carding machine for complete opening, uniform carding, and distribution of fiber filaments. ;

[0069] (2) Afterwards, it is transferred to the net-laying machine for net-laying;

[0070] (3) Feed the laid out fiber web into the spunlace unit for high-pressure nozzle spunlace setting, the spunlace pressure is 10-20bar

[0071] (4) Transport the wet fiber mat to an oven for drying, take it out to obtain the required fiber mat, and its thickness is 10mm.

Embodiment 3

[0073] Fiber felt of the present invention, its needle punching preparation process is as follows:

[0074] (1) 50Kg of glass fiber chopped strands (preferably 65mm in length, 18μm in fiber diameter), 5Kg of rock wool (average diameter not greater than 4 microns) and 0.5Kg of polypropylene fiber (1.2tex, 70mm) are weighed and batched, Put it into the rough opener for rough opening, enter the fine opener through the mixing box for fine opening, and then fully mix through the vibrating cotton box, etc., and then send it to the carding machine for complete opening, uniform carding, and distribution of fiber filaments. ;

[0075] (2) Afterwards, it is transferred to the net-laying machine for net-laying;

[0076] (3) Feed the laid out fiber web into the hot rolling unit for heating (150-200°C) and pressure (5-10Kg / cm2) hot rolling, the fiber web is fixed, and the required fiber mat is obtained after taking it out. The thickness is 7mm.

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Abstract

The invention discloses a fiber mat, comprising 50-100 (weight ratio accounting for the dried fiber mat and the same below) glass fiber and chopped strands, and one or more of 0.1-30 inorganic fibers, 0.1-30 natural fibers, 0.1-30 synthetic fibers, 0.1-30 manmade fibers and an anti-radiation material besides the glass fibers and the chopped strands. The fiber mat is prepared by a needle punching method, a spun lacing method, a thermal rolling method, a wet type paper-manufacturing acid process, a wet type paper-manufacturing thickener method, a wet type paper-manufacturing gel method and the like. According to the preparation method for the fiber mat disclosed by the invention, the conductive thermal coefficient of a vacuum thermal insulation plate made of the fiber mat achieves 25-65% under the premise of adopting the same production mode, and a more superexcellent thermal insulation effect is obtained.

Description

technical field [0001] The invention relates to a novel fiber felt, a preparation method and application field of the felt. Background technique [0002] Glass fiber chopped strand mat (referred to as chopped strand mat) is a main glass fiber non-woven reinforcement material. It is made by chopping continuous glass fibers into about 50mm, uniformly distributed without orientation, and using powder or emulsion as binder. It is made by sedimentation and felting. It is characterized by low price, but it is easy to cause breakage during large-scale construction, so it has become the largest reinforcing material in the glass fiber reinforced polymer hand lay-up process, and is also widely used in mechanical forming processes such as winding and molding. [0003] Vacuum insulation panels are an upgraded product of thermal insulation materials. There are various core materials. Generally, fiber or porous media materials with excellent thermal resistance properties are selected. A...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/4218D04H1/46D04H1/492D04H1/44D04H1/58B32B17/02B32B17/06D21J1/00D21J1/06
CPCD04H1/4218D04H1/46D04H1/49D04H1/54D04H1/43835D04H1/43838
Inventor 杨胜利谢振刚洪国莹
Owner FUJIAN SUPERTECH ADVANCED MATERIAL
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