Hot pressing tympan paper and preparation process

Abstract

The invention aims at providing hot pressing tympan paper, in particular to hot pressing tympan paper, which replaces kraft paper to be used as buffer materials in the pressing process of paper used in electronic industry. The hot pressing tympan paper has the wood pulp raw material composition comprising 65 to 75 percent of softwood pulp and 35 to 25 percent of nature color bamboo wood pulp. The softwood pulp and the nature color bamboo wood pulp are prepared into paper, and the preparation is carried out according to the following steps: (1) mixed pulping: carrying out pulping after the softwood pulp and the nature color bamboo wood pulp are proportionally mixed and crushed, controlling the pulping current between 50 to 60 A, and controlling the pulp forming beating degree between 25 to 30 degrees SR; (2) pulp preparation: carrying out sand removal and slag removal; and (3) carrying out stir-frying by a three-screen multi-cylinder paper machine at a baking cylinder air pressure between 2 and 3 Kg / cm<2>, and controlling the paper thickness at 0.29+ / -0.02mm. The invention adopts the softwood pulp and the nature color bamboo wood pulp for preparing the hot pressing tympan paper to replace the ordinary kraft paper to be used as the buffer materials in the pressing process of the paper used in the electronic industry, the requirements of high temperature resistance and ventilation can be met, and in addition, the heat transfer speed rate is uniform, so the pressed products have stable quality and high finished product yield.

Description

technical field [0001] The invention belongs to the technical field of papermaking, in particular to the manufacture of electronic industrial paper. Background technique [0002] For a long time, in the process of pressing insulation boards, copper foil boards and multilayer circuit boards on hot presses, the buffer material between the heat transfer plate and the pressed steel plate has been replaced by ordinary kraft paper, lacking special buffer materials. Because ordinary kraft paper does not have the characteristics of high temperature resistance and consistent heat transfer rate in the hot pressing process, the quality of the pressed product is very unstable and the yield is very low. Contents of the invention [0003] The purpose of the present invention is to provide a heat-pressing backing paper to replace kraft paper as a cushioning material in the pressing process of paper used in the electronic industry. [0004] Specifically, the wood pulp raw material of the...

AI Technical Summary

Problems solved by technology

Because ordinary kraft paper does not have the characteristics of high temperature resistance and consistent heat transfer rate in the hot pressing process, the quality of the pressed product is very unstable and the yield is very low.