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Carbon fiber insulation hard felt and preparation method thereof

A technology of thermal insulation hard felt and carbon fiber, which is applied in chemical instruments and methods, lamination devices, lamination auxiliary operations, etc. Easy to chalk and ageing effects

Inactive Publication Date: 2017-05-10
JIAXING QISHENG CARBON MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of this, the technical problem to be solved by the present invention is to provide a carbon fiber thermal insulation hard felt and a preparation method thereof. The carbon fiber thermal insulation hard felt provided by the present invention has good thermal insulation performance and a long service life, and solves the problem of easy pulverization of materials. and aging problems

Method used

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  • Carbon fiber insulation hard felt and preparation method thereof
  • Carbon fiber insulation hard felt and preparation method thereof

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preparation example Construction

[0030] The invention provides a method for preparing a carbon fiber thermal insulation hard felt, comprising the following steps:

[0031] A) performing chopping, heating pretreatment, carding and opening, layer laying and acupuncture compounding of carbon fibers in sequence to obtain unit layers;

[0032] B) performing multiple times of sizing and drying the unit layer to obtain a treated unit layer;

[0033] C) superimposing and laying the multi-layer treated unit layers after sizing to obtain a composite unit layer;

[0034] After the uppermost layer and the lowermost layer of the composite unit layer are superimposed and laid with protective layers, hot pressing treatment and carbonization treatment are carried out to obtain carbon fiber thermal insulation hard felt; the heating procedure of the carbonization treatment is:

[0035] Raise the temperature to 1000°C at a heating rate of 20-50°C / h;

[0036] Then raise the temperature to above 1500°C at a heating rate of 30-7...

Embodiment 1

[0082] The PAN-based carbon fiber is chopped to 50mm, and heated at 50°C for 1 hour for pretreatment. Then, the raw material is fed from the feeding port of the carding machine, carded and opened by the carding machine, and then laminated.

[0083] Afterwards, the carbon fibers after laying are needle-punched, and the needle-punching is completed in a needle-punching machine. The fibers have a certain orientation, and more than 60% of the carbon fibers are in the same direction.

[0084] Glue was applied to the prepared unit layers by using a spraying device, and the amount of glue received by each unit layer was 22% (calculated by the weight increase percentage of the unit layer). Push the glue-sprayed unit layer into the drying room for drying at a temperature of 50°C for 0.5 hours. The glue used for sizing is a mixture of vinyl resin and water in a ratio of 1:7.

[0085] Use the spray device to spray glue on the upper and lower surfaces of the 10-layer treated unit layer....

Embodiment 2

[0092] The pitch-based carbon fiber is chopped to 90mm, heated at 120°C for 5 hours for pretreatment, and then the raw material is fed from the feeding port of the carding machine, carded and loosened by the carding machine, and then laminated .

[0093] Afterwards, the carbon fibers after laying are needle-punched, and the needle-punching is completed in a needle-punching machine. The fibers have a certain orientation, and more than 60% of the carbon fibers are in the same direction.

[0094] Put the unit layer into the inner cylinder of a horizontal centrifuge with a dipping tank, first add glue, and slowly rotate the inner cylinder while adding, so that the soft felt is completely soaked in glue, and the immersion time is 5 minutes; then drain the excess glue, and set The rotating speed of the centrifuge is: 1000 rpm; the time is: 2min, and the overall weight gain of the unit layer is controlled at 30%. The glue used for sizing is a mixture of epoxy resin and water in a r...

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Abstract

The invention provides a preparation method of a carbon fiber insulation hard felt, comprising the steps of A) performing sequential steps, to be specific, chopping carbon fibers, heating for pretreatment, carding and opening, layering, and compositing by needle punching to obtain a unit layer; B) gluing the unit layer many times, and drying to obtain a treated unit layer; C) applying glue among the multiple unit layers treated, and stacking and spreading to obtain a composite unit layer; stacking and spreading protective layers to the uppermost and lowermost layers of the composite unit layer respectively, hot-pressing, and carbonizing to obtain the carbon fiber insulation hard felt; a heating procedure in carbonizing refers to: heating to 1000 DEG C at heating rate of 20-50 DEG C / h; heating to 1500 DEG C and above at heating rate of 30-70 DEG C / h. The preparation method of the carbon fiber insulation hard field provided herein integrates the carbonizing and high-temperature procedures of the prior art, so that the production cycle is shortened, and process stability and product quality stability can also be improved.

Description

technical field [0001] The invention belongs to the technical field of carbon fiber thermal insulation hard felt, and in particular relates to a carbon fiber thermal insulation hard felt and a preparation method thereof. Background technique [0002] At present, materials for the thermal field of photovoltaic polycrystalline furnaces are expensive, have poor thermal insulation performance, short service life, and are easy to pulverize. [0003] Most of the traditional carbon fiber thermal insulation felts are made of pre-oxidized silk integral felts. After the pre-oxidized silk integral felts are impregnated with glue, they are then subjected to carbonization, high temperature and other processes. Or use the unit layer of pre-oxidized wire felt, impregnate it with glue, and then carry out carbonization and high temperature treatment. [0004] Due to the low amount of residual carbon (about 65%) in the carbonization process of the pre-oxidized wire, the dimensional change af...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B37/12B32B37/10B32B37/06B32B38/16B32B38/00B32B9/00B32B5/02B32B9/04B32B5/26B32B7/12B32B7/08B32B33/00D04H1/4242D04H1/46
CPCB32B5/02B32B5/26B32B7/08B32B7/12B32B9/007B32B9/047B32B33/00B32B37/06B32B37/10B32B37/12B32B38/0036B32B38/164B32B2262/106B32B2307/306B32B2307/31D04H1/4242D04H1/46
Inventor 於婷刘江平房冰
Owner JIAXING QISHENG CARBON MATERIALS
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