Processing process for preparing refrigerator vacuum heat-insulating plate by new drying method

Abstract

The invention discloses a processing process for preparing a refrigerator vacuum heat-insulating plate by a new drying method. According to the process, a high-efficiency adsorbent material is added,and the residual water after vacuumizing is absorbed by a chemical adsorption mode; meanwhile, the vacuumizing mode and the environment of the process are controlled, so that the aim of not drying a core material in advance is fulfilled; and the material used by the invention adopts the adsorbent which takes calcium oxide and calcium hydroxide as raw materials, and in the calcium oxide obtained through pretreatment and high-temperature calcination, the purity is higher, the mesh number is larger, the specific surface area can reach to more than 20 m<2>/g, and the water-absorbing rate of the adsorbent is 4 to 5 times higher than that of the ordinary adsorbent. After the vacuum heat-insulating plate is manufactured, the residual water inside can be absorbed rapidly through the high-speed water-absorbing capability of the adsorbent, so that the production links of the vacuum heat-insulating plate are reduced and efficiency is improved.

Description

technical field [0001] The invention relates to the field of vacuum insulation panels, in particular to a processing technology for preparing refrigerator vacuum insulation panels by a novel drying method. Background technique [0002] Vacuum insulation panels are currently the best known insulation materials because their thermal conductivity can reach 0.003W / m·K. The efficient insulation of vacuum insulation panels is based on the "vacuum" inside them. Through the high barrier film and the use of adsorbent, the vacuum inside the product can be effectively guaranteed through the vacuuming process. Usually, there are two situations that have a great impact on the initial internal vacuum value of the product. One is the residual gas in the vacuuming process, and the other is the re-release of the gas adsorbed on the inner surface of the core material and the film bag; among these gases, water vapor The impact is particularly obvious. During the production process of vacuum ...

AI Technical Summary

Problems solved by technology

Usually, there are two situations that have a great impact on the initial internal vacuum value of the product. One is the residual gas in the vacuuming process, and the other is the re-release of the gas adsorbed on the inner surface of the core material and the film bag; among these gases, water vapor The impact is particularly obvious. During the production process of vacuum insulation panels, the moisture of the core material is generally removed in advance. The most common methods are high-temperature baking and microwave drying, so that the moisture content is lower than a certain range, thereby reducing the quality of the finished product. Although the impact of moisture on the initial vacuum value of the product can be reduced by drying the core material, it consumes a lot of energy due to high temperature or microwave, and occupies a certain amount of site resources; the increased moisture removal process also reduces production. s efficiency