Vacuum heat insulation plate core material and manufacturing method thereof

Abstract

The invention discloses a manufacturing method of a vacuum heat insulation plate core material, which specifically comprises the steps that: glass fiber cotton which is manufactured through a centrifugation method and a flame method is pulped, diluted, applied onto a mesh, dewatered and formed, rolled and formed, dewatered in vacuum negative pressure, dried, cooled and cut. According to the invention, the glass fiber cotton which is manufactured through the 30 percent centrifugation method and the glass fiber cotton which is manufactured through the 70 percent flame method serve as the raw material of the vacuum heat insulation plate core material, the heat transfer coefficient of the manufactured vacuum heat insulation plate core material is 0.0025W / m.k to 0.004 W / m.k, the heat insulation coefficient of the heat insulation plate is 0.0005 W / m.k higher than that of the vacuum heat insulation plate core material which adopts the glass fiber cotton manufactured through the 100 percent flame method as the raw material, so that the impact on the heat insulation effect is small, and the manufacturing cost of the vacuum heat insulation plate core material is greatly saved; and the thickness of the core material is 0.5mm to 8mm, and the thickness difference from that of the vacuum heat insulation plate core material which adopts the glass fiber cotton manufactured through the 100 percent flame method as the raw material is not big.

Description

technical field [0001] The invention relates to a core material of a vacuum insulation board and a manufacturing method thereof, in particular to a manufacturing method using glass fiber cotton as a raw material. Background technique [0002] At present, the vacuum insulation panel has been applied in various fields, and it meets the requirements of customers with the characteristics of energy saving, low carbon, environmental protection and safety. Through research and actual operation, it can be seen that the selection and production method of the core material inside the vacuum insulation panel has a great influence on its performance. The core material is generally made of porous media materials, such as airgel, microporous polyurethane, silica powder, asbestos fiber, glass fiber, etc. For the core material of the vacuum insulation panel, it must have the following four characteristics: 1. It can support the vacuum insulation panel under high vacuum and negative pressur...

AI Technical Summary

Problems solved by technology

[0003] At present, due to the different application fields of different types of vacuum insulation panels, the selection of core materials is also different. For home appliance insulation and building exterior wall insulation, it is required to have good thermal resistance and low thermal conductivity. At present, the thermal conductivity of most vacuum insulation panels is low. Between 0.01-0.02W / m.K, and the core material of the vacuum insulation panel is bulky, and the thickness is generally between 1cm-5cm. After being used for home appliance insulation and building exterior wall insulation, it reduces the available space of home appliances and buildings and keeps them warm. short life