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Preparation method of special VIP nanometer core material for refrigerator

A technology of vacuum insulation panels and nano cores, which is applied in the direction of glass manufacturing equipment, manufacturing tools, synthetic cellulose/non-cellulose material pulp/paper, etc., to achieve the effect of increasing specific surface area, uniform thermal conductivity, and compact density

Active Publication Date: 2011-05-04
CHONGQING ZAISHENG TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006]Due to the small specific surface area of ​​the above-mentioned core materials, the thermal conductivity is large and the thermal insulation effect is limited

Method used

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  • Preparation method of special VIP nanometer core material for refrigerator

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The third step is to add the obtained slurry into a slurry tank and dilute to a mass concentration of 0.5%, remove the slag with a centrifugal slag remover, and then use a paper machine for papermaking and molding. The invention adopts a wet forming process, which is similar to the back-end principle of papermaking. In order to ensure the uniformity and stability of the prepared VIP nano-core material, the slurry concentration of the present invention is relatively low, but the high moisture content must be equipped with suitable suction and drying processes, so the wet paper is dried before entering the drying room. , the humidity is required to be lower than 20%, which requires that the vacuum capacity must meet the requirements. The present invention is divided into three stages of vacuum suction, and each stage selects vacuum pumps with different vacuum sizes according to the process requirements. The main purpose of the first stage is to dehydrate slightly, and the...

Embodiment 2

[0031] The second step, the average diameter of 25% by weight is the alkali-free glass fiber of 0.1 μm, the average diameter of 35% by weight is the high-alkali glass fiber of 0.3 μm, the average diameter of 20% by weight is the high-alkali glass fiber of 1 μm and 20 The high-alkali glass long fiber that the average diameter of % weight is 2 μ m carries out beating and dispersing in the aqueous solution that adds sulfuric acid, and the mass concentration of controlling slurry is 4.5%, beating degree is 45 ° of SR, and the acidity of controlling slurry with sulfuric acid is pH 2.5, beating time is 45min.

[0032] The third step is the same as in Example 1.

[0033] Example 3

[0034] The preparation method is the same as in Example 2. The composition of the mixed fiber is that the average diameter of 22% by weight is an alkali-free glass fiber of 0.5 μm, the average diameter of 33% by weight is a high-alkali glass fiber of 0.8 μm, and the average diameter of 25% by weight is 1...

Embodiment 3

[0037] name

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Abstract

The invention discloses a preparation method of a special VIP nanometer core material for a refrigerator, which comprises the following steps: (1) conducting pulping-dispersing on 20-25% by weight of alkali-free glass fiber with average diameter of 0.1-0.5mum, 30-35% by weight of high-alkali glass fiber with average diameter of 0.3-0.8mum, 20-25% by weight of high-alkali glass fiber with average diameter of 0.8-1.5mum and 15-30% by weight of high-alkali glass fiber with average diameter of 1-2mum; (2) diluting pulp, removing slag, then conducting wet forming to obtain wet paper, and conducting suction dehydration on the wet paper under the condition of 0.1-0.5 Mpa vacuum degree to lead the water ratio of the wet paper to be less than 20%; and (3) drying the wet paper at the temperature of200-300 DEG C to obtain the product. The special VIP nanometer core material has the advantages of low heat conduction coefficient and good thermal insulation effect, and does not contain any hazardous substance, thus being the ideal environment-friendly insulated material special for the refrigerator.

Description

technical field [0001] The invention relates to a vacuum insulation panel for refrigerator insulation, in particular, it is a core material of a vacuum insulation panel specially used for a refrigerator. Background technique [0002] Vacuum insulation panel (Vacuum Insulation Panel, referred to as VIP) is a new type of super insulation material, its thermal conductivity is less than 0.010w / m·k, it has excellent thermal insulation performance, and it also has the characteristics of saving space. At present, VIP boards have begun to be used in refrigerators, freezers, electric water heaters and other home appliances, as well as medical, cold chain, construction and other thermal insulation fields, with obvious energy-saving effects. [0003] VIP board usually consists of three parts: air barrier structure, core material and getter. Among them, the air barrier structure is a bag-like structure, and its function is to vacuumize the core material and package it to form a vacuum...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H13/40D21F5/14D21F5/00C03B37/022
Inventor 郭茂
Owner CHONGQING ZAISHENG TECH CORP