Low-temperature thermal insulation paper preparation method

A low-temperature thermal insulation and multi-layer thermal insulation technology, applied in papermaking, textile and papermaking, synthetic cellulose/non-cellulose material pulp/paper, etc., can solve the problems of affecting product performance, increasing outgassing rate, and high comprehensive cost. Achieve long service life, increase contact thermal resistance, and good profiling

Active Publication Date: 2009-11-18
HANGZHOU FUSHIDA SPECIAL MATERIAL
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the glass filaments of woven glass cloth need to be added with wax or other oils during the fiber drawing process to prevent the fibers from sticking to each other, they need to undergo high-temperature degreasing treatment when used in multi-layer insulation structures. Once there are problems in the treatment process or treatment operations Improperly, the outgassing rate under vacuum will increase and affect the performance of the product, and in actual use, because the fiber diameter is relatively thick, it is easy for the fiber to enter the capillary pores of the human body and make the body itchy, thus bringing troubles to production and operation. There are many uncertain factors and difficulties, and the overall cost is high; while using other papers such as cigarette paper can save the trouble of degreasing, but it is not resistant to high and low temperatures (high temperature is easy to force the paper to age and low temperature is easy to make the paper fat. Brittle), some chemicals added in the paper production process will affect the final vacuum, thus affecting product performance

Method used

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  • Low-temperature thermal insulation paper preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0033] The preparation of embodiment 1 low temperature insulation paper (referring to figure 1 )

[0034] (1) Add 100Kg of 49°SR (fiber diameter 0.1-1.0μm) ultra-fine alkali-free glass fiber into the beater and dilute it to 1.0% with water, add sulfuric acid to adjust the pH value to 2.5, and put it away after the fibers are all dispersed into single strands into the mixing pool;

[0035] (2) Continue to dilute the glass fiber put into the slurry mixing tank to 0.1% with white water, and add sulfuric acid to adjust the pH value to 2.5, and after stirring evenly, use a pump to send the slurry to the slurry storage tank after being treated by a conical slag remover;

[0036] (3) Pump the slurry from the slurry tank to the headbox, dilute it with white water to 0.05% again, and then take it online, after dehydration and pressing, it enters the drying tunnel for drying, and finally after trimming, stick it to the cylinder and coil it into rolls .

[0037] The above-mentioned fi...

Embodiment 2

[0039] Example 2 Preparation of Low Temperature Thermal Insulation Paper

[0040] (1) Add 40Kg of 49°SR (fiber diameter 0.1-1.0μm) alkali-free glass fiber into the beater, dilute it to 0.5% with water, add sulfuric acid to adjust the pH value to 2.5, and put the fiber into the compound after all the fibers are dispersed into a single fiber pulp pool;

[0041] Take 60Kg of 54°SR alkali-free glass fiber (fiber diameter is 0.1-1.0μm), add it into the beater, dilute it with water to a concentration of 0.5%, add sulfuric acid and adjust the pH value to 2.5, and put it into the compound after all the fibers are dispersed into single fibers. pulp pool;

[0042] (2) Continue to dilute the glass fiber put into the pulp mixing tank to 0.05% with white water, and add sulfuric acid to adjust the pH value to 2.5, and after stirring evenly, use a pump to send the slurry to the slurry storage tank after being treated by a conical slag remover;

[0043] (3) Pump the slurry from the slurry t...

Embodiment 3

[0046] Example 3 Preparation of Low Temperature Thermal Insulation Paper

[0047] (1) Put 40Kg of 49°SR (fiber diameter 0.1-1.0μm) alkali-free glass fiber into the beater and dilute it to 2.0% with water, add sulfuric acid to adjust the pH value to 3.0, and put the fiber into the compound after all the fibers are dispersed into a single fiber pulp pool;

[0048] Take 60Kg of 54°SR alkali-free glass fiber (fiber diameter is 0.1 ~ 1.0μm), add it into the beater, dilute it with water to a concentration of 2.0%, add sulfuric acid and adjust the pH value to 3.0, and put it into the compound after all the fibers are dispersed into single fibers. pulp pool;

[0049](2) Continue to dilute the glass fiber put into the slurry mixing tank to 0.5% with white water, and add sulfuric acid to adjust the pH value to 3.0, and after stirring evenly, use a pump to send the slurry to the slurry storage tank after being processed by a conical slag remover;

[0050] (3) Pump the slurry from the s...

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Abstract

The invention relates to a low-temperature heat-insulating paper, and also relates to a preparation method and application of the low-temperature heat-insulating paper. The low-temperature heat-insulating paper of the present invention is prepared by using ultra-fine alkali-free glass fiber through a wet papermaking process; the basis weight of the low-temperature heat-insulating paper is 10-20 g / m2, and the thickness is 0.06-0.09 mm. The preparation method of the low-temperature heat-insulating paper includes: beating the ultra-fine alkali-free glass fiber, stirring and dispersing it, taking it with a paper machine, drying it and finally forming it into a roll to obtain a finished product. The low-temperature heat-insulation paper of the invention can be used in the vacuum multi-layer heat-insulation structure of cryogenic liquid storage and transportation containers and matching pipelines. The low-temperature heat-insulating paper of the invention has good heat-insulation performance, low outgassing rate under vacuum, good profiling property, long service life and wide application.

Description

(1) Technical field [0001] The invention relates to a low-temperature heat-insulating paper, and also relates to a preparation method and application of the low-temperature heat-insulating paper. (2) Background technology [0002] At present, the insulation materials commonly used in the vacuum multilayer insulation structure of cryogenic liquid storage and transportation containers and their supporting pipelines are glass cloth, and other papers such as cigarette paper are used as substitutes. Since the glass filaments of woven glass cloth need to be added with wax or other oils during the fiber drawing process to prevent the fibers from sticking to each other, they need to undergo high-temperature degreasing treatment when used in multi-layer insulation structures. Once there are problems in the treatment process or treatment operations Improperly, the outgassing rate under vacuum will increase and affect the performance of the product, and in actual use, because the fiber...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H13/40D21H15/02D21H11/02
Inventor 应建明
Owner HANGZHOU FUSHIDA SPECIAL MATERIAL
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