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Fiber/powder composite felt and preparation method thereof and vacuum thermal insulation panel

A technology of fiber felt and composite felt, applied in the field of thermal insulation materials, which can solve the problems of high strength, small aperture, and high rebound rate of the core material of vacuum insulation panels, and achieve small expansion rate, reduced rebound rate and pore diameter, and good embryo body The effect of suppressing mass

Pending Publication Date: 2021-03-26
英索来欣(苏州)新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a fiber / powder composite felt. The fiber / powder composite felt not only solves the problem of high rebound rate of the core material of the vacuum insulation panel, but also has small pore size and high strength.

Method used

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  • Fiber/powder composite felt and preparation method thereof and vacuum thermal insulation panel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Cut and weigh 15 pieces of centrifugal cotton felt of 300*300*0.5mm, stack 5 pieces of them together, and put them into a metal mold;

[0035] (2) Evenly mix 45 parts of fumed silica, 45 parts of precipitated silica and 10 parts of silicon micropowder in a mixer, weigh 15 pieces of mixed powder of centrifugal cotton felt weight 1 / 20, and spread it evenly Form a powder layer on the surface of the centrifugal cotton felt;

[0036] (3) Superimpose 5 centrifugal cotton felts of 300*300*0.5mm on the surface of the powder layer;

[0037] (4) Evenly spread 15 pieces of mixed powder of 1 / 20 weight of centrifugal cotton felt on the surface of centrifugal cotton felt to form the second powder layer, and then superimpose 5 pieces of centrifugal cotton of 300*300*0.5mm on the surface Felt, using a press to heat-press the fiber felt and powder layer, the hot-pressing temperature is 450°C, the pressure is 8MPa, and the time is 12min, so as to form a pressed blank;

[0038] (5) ...

Embodiment 2

[0041] (1) Cut 20 pieces of 300*300*0.5mm centrifugal / flame cotton felt (70% centrifugal cotton + 30% flame cotton) and weigh them, stack 5 of them together and put them into a metal mold;

[0042] (2) 50 parts of fumed silica, 40 parts of precipitated silica and 10 parts of low-melting nylon fibers are uniformly mixed in a blender, from which 20 pieces of mixed powder of centrifugal / flame cotton felt weight 1 / 30 are weighed, and Spread it evenly on the surface of the centrifugal / flame cotton felt to form a powder layer;

[0043](3) Superimpose 5 centrifugal / flame cotton felts of 300*300*0.5mm on the surface of the powder layer;

[0044] (4) Repeat step (2) and step (3) 3 times, use press to carry out hot pressing treatment to fiber felt and powder layer, described hot pressing temperature is 180 ℃, pressure is 5MPa, time is 2min, makes it form pressed blanks;

[0045] (5) Demoulding the pressed blank, ejecting it and pushing it out of the machine to form a fiber / powder comp...

Embodiment 3

[0048] (1) Cut and weigh 50 glass fiber chopped strands / low-melting point polyester fiber mats (90% glass fiber chopped strands + 10% low-melting point polyester fibers) of 200*200*0.3mm, and weigh 10 of them The sheets are stacked together and placed in metal molds;

[0049] (2) Mix 50 parts of fumed silica, 44 parts of precipitated silica and 6 parts of low melting point glass powder in a mixer, and weigh 50 pieces of glass fiber chopped strands / low melting point polyester fiber mat weight 1 / 60 mixed powder, and spread it evenly on the surface of glass fiber chopped strands / low melting point polyester fiber mat to form a powder layer;

[0050] (3) Superimpose 10 glass fiber chopped strands / low-melting point polyester fiber mats of 200*200*0.3mm on the surface of the powder layer;

[0051] (4) Repeat step (2) and step (3) 4 times, and use a press to perform hot pressing treatment on the fiber felt and powder layer. The hot pressing temperature is 260 ° C, the pressure is 2 ...

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Abstract

The invention discloses a fiber / powder composite felt and a preparation method thereof and a vacuum thermal insulation panel. The fiber / powder composite felt comprises laminated fiber felt bodies andpowder pressing pieces located between the fiber felt bodies. 20-100 fiber felt bodies are arranged, the powder pressing pieces are laid in the middle of every 1-10 fiber felt bodies, and the powder bodies are formed by hot pressing of powder; and the fiber felt bodies are composed of 90-100 parts of glass fibers and 0-10 parts of hot-melt adhesive fibers, and the powder pressing pieces are composed of 30-60 parts of fumed silica, 40-70 parts of precipitated silica, 0-10 parts of silica powder and 0-10 parts of low-melting-point filler. The fiber / powder composite felt disclosed by the invention not only solves the problem of high rebound rate of a vacuum thermal insulation panel core material, but also has small aperture and high strength.

Description

technical field [0001] The invention relates to the technical field of thermal insulation materials, in particular to a fiber / powder composite felt, a preparation method thereof and a vacuum thermal insulation panel. Background technique [0002] Vacuum insulation panels are currently the world's lowest thermal conductivity and best thermal insulation new insulation materials. At the same time, they have Class A fireproof performance, which can meet the energy-saving and fireproof design of various buildings, including zero-energy buildings, public buildings, and civil buildings. Standards have been more and more widely used in China in recent years. However, there are usually problems such as irregular operation in construction sites in my country, which lead to safety problems such as bulging and falling off of vacuum insulation panels after they are installed on the wall, which affects the image of vacuum insulation panels among users. One of the main reasons is that the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B9/00B32B9/04B32B17/02B32B37/06B32B37/10E04B1/80
CPCB32B5/02B32B5/08B32B5/16B32B5/30B32B37/06B32B37/10E04B1/803B32B2250/40B32B2262/101B32B2262/0261B32B2262/0276B32B2264/102B32B2264/101B32B2264/10B32B2264/12B32B2309/02B32B2309/04B32B2309/12B32B2307/304B32B2307/51B32B2307/54B32B2419/00Y02B80/10Y02A30/242
Inventor 李承东马汝军吕云红柳永忠
Owner 英索来欣(苏州)新材料科技有限公司
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