Vacuum insulated panel core material and manufacturing method thereof

A technology of vacuum insulation panels and core materials, which is applied to heat exchange equipment, protected pipes through thermal insulation, thermal insulation, etc., can solve the problems of high manufacturing cost, low manufacturing cost, and inability to achieve ideal thermal insulation performance, and achieves a reduction in manufacturing costs. Cost and thermal insulation improvement effect

Active Publication Date: 2010-08-04

CHONGQING ZAISHENG TECH CORP

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AI-Extracted Technical Summary

Problems solved by technology

[0003] At present, the commonly used vacuum insulation panels mainly use polymerized organic fibers, centrifugal cotton and glass fiber cotton, glass fibers sprayed with organic binders, etc. as core materials, and polymerized organic fiber core materials, centrifugal c...

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Abstract

The invention discloses a vacuum insulated panel core material, which comprises the following raw materials in parts by weight: 48 parts of mineral wool, 45 parts of glass fiber wool 27-30 degree SR and 35 parts of glass fiber wool 18 degree SR. The diameter of the fiber of the mineral wool is 4-6 mum, the length is 1.0-4.0mm and the water content is 20 percent. The manufacturing method of the vacuum insulated panel core material comprises the following steps: pumping of glass fiber wool, pulping of mineral wool, dilution and slag removal, regulation of acidity, slag removal and making, drying and cutting. Since the mineral wool is used, the manufacturing cost of the core material is greatly reduced and the insulation performance is improved to certain extent when the vacuum insulated panel core material is compared with pure glass fiber wool core material and other conventional core material.

Application Domain

Thermal insulationPipe protection by thermal insulation

Technology Topic

Water contentSlag +7

Image

Examples

Experimental program(3)

Example Embodiment

[0020] Example 1

[0021] The core material of the vacuum insulation panel of this embodiment includes the following raw materials: 48Kg mineral wool, 45Kg glass fiber wool 27°SR, 35Kg glass fiber wool 18°SR, where “°SR” refers to the degree of tapping, which is also called beating Degree, reflecting the effect of the refining effect of the fiber being cut, split, swelled, and hydrated after the slurry passes through the refiner. The mineral wool is rock wool and/or slag wool. After the natural rock or metallurgical slag is melted in a cupola or tank kiln, the fiber diameter is 4-6μm and the length is 1.0~ The mineral wool with 4.0mm and 20% moisture content has low raw material cost, which is beneficial to reduce production costs.

[0022] The accompanying drawing is a process flow chart of the present invention, as shown in the figure: The method for manufacturing a core material of a vacuum insulation panel of this embodiment includes the following steps:

[0023] a) Glass fiber cotton pulping: Put 45Kg glass fiber cotton 27°SR and 35Kg glass fiber cotton 18°SR into beater I, and add white water for dispersion pulping, adjust the PH value of the slurry to 3.5, and control the speed of beater I It is 980r/min, and the dispersion time is 26 minutes. The above white water is waste water from the papermaking section. The white water mainly contains fine fibers, fillers, coatings and dissolved wood components, as well as added rubber, wet strength agent, preservatives, etc., which can be biochemically Low sex.

[0024] b) Mineral wool pulping: Add 48Kg of mineral wool to the beater II for dispersion and pulping. The speed of the beater II is controlled to 980r/min, the dispersion time is 2 minutes, and the dispersion concentration is 4.8%;

[0025] c) Dilution and deslagging: the slurry prepared in step a is transferred to the storage tank, and white water is added to dilute it to a dispersion concentration of 1.2%, and then it is transported to the advanced tank after being removed by the first-level deslagging device. The glass fiber wool contains unfibrated glass slag, which needs to be removed by a first-level cleaner. The role of the slag remover is to remove substances with a large proportion, mainly including glass slag and impurities. The presence of glass slag in the core material will increase The thermal conductivity of the core material, and it is not easy to reach the ideal vacuum degree during the post-processing vacuuming process;

[0026] d) Acidity adjustment: directly transport the slurry prepared in step b to the advance tank to mix with the glass fiber cotton slurry, add white water, and adjust the pH value of the mixed slurry to 3.0;

[0027] e) Deslagging and papermaking: The mixed slurry prepared in step d is deslagged by a secondary slag remover and then transported to a 60-mesh polyester forming net for papermaking. The paperwork is vacuum suctioned to remove water and pressed to obtain the core material Semi-finished products

[0028] f) Drying: Place the core material semi-finished product prepared in step e in a drying room at 220°C for drying;

[0029] g) Slitting: Slitting the dried semi-finished core material into finished core materials of different specifications and models.

[0030] In this embodiment, the white water produced in step e is recycled for use in steps a, c, and d, and the waste water is recycled to achieve the purpose of environmental protection and energy saving.

[0031] The core material of the vacuum insulation board manufactured by the above method is sampled and tested, and its thermal conductivity is measured, and compared with the sampled thermal conductivity of other core materials. The comparison results are as follows:

[0032] name

Example Embodiment

[0033] Example 2

[0034] For the core material of the vacuum insulation panel of this example, the "45Kg glass fiber wool 27°SR" in Example 1 is replaced with "45Kg glass fiber wool 29°SR". The rest are the same as in Example 1, using the material of Example 1. In the manufacturing method, in step d, the PH value of the mixed slurry is adjusted to 2.9 to prepare a vacuum insulation board core material, and conduct sampling inspection to measure its thermal conductivity, and compare it with the thermal conductivity of other core materials. The comparison results are as follows table:

[0035] name

Example Embodiment

[0036] Example 3

[0037] For the core material of the vacuum insulation panel of this example, the "45Kg glass fiber wool 31°SR" in Example 1 is replaced with "45Kg glass fiber wool 29°SR". The rest are the same as in Example 1, using the material of Example 1. The manufacturing method, step d adjusts the PH value of the mixed slurry to 2.8 to prepare a vacuum insulation board core material, and conduct sampling inspection to measure its thermal conductivity, and compare it with the thermal conductivity of other core materials. The comparison results are as follows table:

[0038] name

[0039] It can be known from Examples 1 to 3 that the thermal conductivity of mineral wool and glass fiber wool core materials is slightly lower than that of pure glass fiber wool, and at the same time lower than other thermal insulation core materials. From the perspective of production cost, the manufacturing cost of the synthetic core material of mineral wool and glass fiber wool is also lower than that of pure glass fiber wool.

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PUM

Property	Measurement	Unit
Fiber diameter	4.0 ~ 6.0	µm
Length	1.0 ~ 4.0	mm
Diameter	4.0 ~ 6.0	µm
tensile		MPa
Particle size		Pa
strength	10

Description & Claims & Application Information

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Classification and recommendation of technical efficacy words

Improve thermal insulation
Low manufacturing cost

Cement-based wallboard having large hollow ratio and ultrahigh toughness as well as preparation method of cement-based wallboard

ActiveCN110776334AReduce size and weightImprove thermal insulationConstruction materialCeramicwareCement MaterialFiber

Owner:CHINA WEST CONSTR ACAD OF BUILDING MATERIALS CO LTD +1

Vacuum insulated panel core material and manufacturing method thereof

AI-Extracted Technical Summary

Problems solved by technology

Abstract

Image

Examples

Example Embodiment

Example Embodiment

Example Embodiment

PUM

Description & Claims & Application Information

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