Manufacturing method of cotton pulp hot-pressing liner paper and hot-pressing liner paper obtained by the method

A manufacturing method and technology of liner paper, applied in the field of hot-pressed liner paper and cotton pulp heat-pressed liner paper, can solve the problems of uncontrollable influence, unstable test stage, inconvenient replacement and testing, etc.

Inactive Publication Date: 2020-08-07
上海汉伦特种纤维材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The feature is reusable, but not easy to replace and test
Moreover, after repeated use of composite materials in high-temperature and high-pressure environments,

Method used

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  • Manufacturing method of cotton pulp hot-pressing liner paper and hot-pressing liner paper obtained by the method
  • Manufacturing method of cotton pulp hot-pressing liner paper and hot-pressing liner paper obtained by the method
  • Manufacturing method of cotton pulp hot-pressing liner paper and hot-pressing liner paper obtained by the method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] A cotton pulp hot-pressed liner paper is prepared according to the following method:

[0069] (1) 100% pure cotton pulp is sent into a hydropulper for disentangling to obtain the first slurry;

[0070] (2) sending the first slurry into the continuous refining equipment for refining, and the degree of beating of the refining is 15~45°SR to obtain the second slurry;

[0071] (3) The second slurry is sent into a pressure sieve, and short fine fibers and broken fibers are screened out to obtain the third slurry;

[0072] (4) The third slurry slurry is sent into the fourdrinier multi-cylinder paper machine, and paper copying is carried out to obtain a wet paper sheet;

[0073] (5) Send the wet paper sheet into the first group of multi-dryer drying section for the first step of drying, the drying temperature is 80-100°C, so that the moisture content in the paper is ≤15%, meeting the impregnation requirement;

[0074] (6) Send the paper that meets the impregnation requiremen...

Embodiment 2

[0078] 80% cotton pulp + 20% wood pulp are used for the cotton pulp heat-pressed liner paper, and the other preparation processes are the same as in Example 1.

Embodiment 3

[0080] 60% cotton pulp + 40% wood pulp is used for the cotton pulp hot-pressed liner paper, and the other preparation processes are the same as in Example 1.

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Abstract

The invention provides a manufacturing method of cotton pulp hot-pressing liner paper. According to the method, pure cotton pulp or cotton pulp and other pulp types (such as wood pulp, hemp pulp and bamboo pulp) are mixed according to different proportions to serve as raw materials, and after wet paper sheets are formed through an in-machine pulp and out-machine addition method, the surfaces of the paper sheets are coated or soaked with a high-temperature-resistant auxiliary agent, so that the high temperature resistance and folding resistance of products are improved, and the use amount of the auxiliary agent is reduced. Due to the fact that the cotton pulp is used, extra chemical auxiliaries such as a wet strength agent, a retention aid, an adhesive and a dry strength agent do not need to be added in the manufacturing process, and the overall performance such as the high temperature resistance is improved from the raw materials. At present, hot-pressing paper made of cotton pulp doesnot exist on the market, and most of the hot-pressing paper is kraft paper made of wood pulp or a buffer pad made of composite fibers. Compared with kraft paper, the hot-pressing paper made of the cotton pulp has longer service life, and the raw materials and the manufacturing process are more environment-friendly.

Description

technical field [0001] The invention relates to the technical field of special paper, in particular to a method for manufacturing cotton pulp hot-pressed backing paper (also known as hot-pressed backing paper), and the hot-pressed backing paper obtained by the method. Background technique [0002] At present, the FPC flexible circuit board industry, PCB industry, copper-clad laminate industry and laminate industry all need to use hot-press buffer materials. Specifically, in the circuit board pressing process, due to the high actual operating temperature (currently 190-260°C, the operating temperature will be higher after the birth of 5G and new technology), and the operating pressure is relatively high, so in order to play To uniformly transmit temperature and pressure, heat-pressing buffer materials must be added during the production process to uniformly transmit temperature and pressure to the electronic circuit board. The quality of the hot-pressed cushioning material d...

Claims

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Application Information

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IPC IPC(8): D21B1/34D21D1/20D21D5/02D21F1/00D21F5/02D21H21/34D21H23/32
CPCD21B1/345D21D1/20D21D5/02D21F1/00D21F5/02D21H21/34D21H23/32
Inventor 王陆良钱园严冬赵平
Owner 上海汉伦特种纤维材料有限公司
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