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Core material for vacuum heat insulating material formed from cured foam of melamine resin, vacuum heat insulating material using the same, and production method thereof

A vacuum insulation material, melamine technology, applied in heat exchange equipment, mechanical equipment, pipeline protection through heat insulation, etc., can solve the problems of reduced molding characteristics, reduced heat insulation performance, reduced durability, etc., and achieve the effect of preventing the reduction of vacuum degree

Inactive Publication Date: 2017-03-08
LG HAUSYS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the case of using glass fiber wool as the core material of the vacuum insulation material, although excellent initial thermal performance can be ensured, during long-term use, the gas permeating through the outer skin material film will increase the thermal conductivity, resulting in long-term failure. The problem of reduced durability
On the contrary, when the glass fiber board is used as a core material for vacuum insulation materials for a long time, the small pore diameter of the glass fiber board minimizes the heat transfer caused by the gas when the gas passes through, so it has the advantage of excellent long-term durability. However, it has the disadvantage of decreasing the initial thermal insulation performance.
[0004] As a result, in the case of using glass fiber wool as a core material in the existing vacuum insulation materials, the long-term durability performance is reduced, and the life is short. In the field of construction, there are problems in reliability, and when it is applied to the field of home appliances, there are also problems in reliability. In addition, when glass fiber boards are used as core materials, the cost of production is high and the molding characteristics are reduced. Therefore, in the There are limitations in application as heat insulating materials, so the need for research on core materials for vacuum heat insulating materials is increasing

Method used

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  • Core material for vacuum heat insulating material formed from cured foam of melamine resin, vacuum heat insulating material using the same, and production method thereof
  • Core material for vacuum heat insulating material formed from cured foam of melamine resin, vacuum heat insulating material using the same, and production method thereof
  • Core material for vacuum heat insulating material formed from cured foam of melamine resin, vacuum heat insulating material using the same, and production method thereof

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preparation example Construction

[0057] In another embodiment of the present invention, a method for preparing a vacuum thermal insulation material is provided, and the preparation method for the vacuum thermal insulation material includes the following steps: preparing a foam formed from a melamine resin cured foam with an open cell content (Open Cell Content) of more than 80% Steps of core material for vacuum insulation material; steps of removing residual substances by applying pressure of 0.5Pa to 10Pa for 10 minutes to 200 minutes at a temperature of 50°C to 250°C to the above-mentioned core material; and wrapping with a skin material The step of vacuum packaging is carried out after covering the above-mentioned core material.

[0058] The core material formed by the above-mentioned melamine resin-cured foam is formed by mixing melamine-formaldehyde resin, curing agent, foaming agent and other additives at high speed and curing at a temperature above normal temperature, and As a product of the reaction, ...

Embodiment 1

[0063] The average particle diameter of the bubbles was 100 μm, the porosity was 95%, and the compressive strength was 1.5 kgf / cm 2 The melamine resin cured foam is made into a size of 8 × 190 × 250 mm (thickness × width × length) and used as a core material for vacuum insulation materials. Then, the outer skin is formed from the structure of polyvinylidene chloride (PVDC) / polyethylene terephthalate (PET) film (PET) 12 μm, nylon (Nylon) film 25 μm, aluminum foil 7 μm and linear low density polyethylene (LLDPE) film 50 μm structure Material. Next, 25 g of quicklime (CaO) having a purity of 95% was put into a pouch to prepare two absorbent materials and inserted on the surface of the core material. Then, under the temperature condition of 150°C, all residual gas of 5Pa was exhausted, the core material was inserted into the bag body, and then sealed in a vacuum state of 10Pa, thereby preparing the vacuum heat insulating material of the present invention.

Embodiment 2

[0065] Except that the average particle diameter of the bubbles is 100 μm, the porosity is 90%, and the compressive strength is 1.2 kgf / cm 2 The melamine resin cured foam was made into a size of 8×190×250mm (thickness×width×length) and used as a core material for vacuum insulation materials, and a vacuum insulation material was prepared according to the same conditions as in Example 1 above.

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Abstract

Provided is a core material for a vacuum insulation material formed of a melamine resin-cured foam having an open cell content of at least 80%. In addition, provided are a vacuum insulation material containing the core material and an outer skin material which vacuum-packages the core material, and a method for manufacturing same.

Description

technical field [0001] The present invention relates to a core material for vacuum heat insulating material formed from a melamine resin cured foam, a vacuum heat insulating material utilizing the same, and a preparation method thereof. Background technique [0002] Vacuum insulation materials are generally prepared by using an inorganic compound with low thermal conductivity and low gas generation rate like glass fiber as a core material, and covering it with a bag body formed of a composite plastic laminate film with excellent gas barrier properties. After depressurizing the outside and the inside, the laminated portion between the gas barrier films is heat-sealed to prepare a vacuum heat insulating material for use in electronic products. Existing glass fiber wool used as a core material of a vacuum heat insulating material is prepared by collecting bulky glass fibers and subjected to a thermocompression bonding process, and this is used as a core material. Therefore, in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16L59/065F16L59/04C08J9/42
CPCC08J9/12B32B3/04B32B7/12B32B15/08B32B27/065B32B27/304B32B27/306B32B27/32B32B2266/0285B32B2266/06C08J2201/03C08J2205/05C08J2361/28
Inventor 金明姬李应基崔哲准金志纹池升昱全昺朱
Owner LG HAUSYS LTD
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