High-temperature hot-pressing pad layer paper manufacturing method
A technology of high temperature hot pressing and manufacturing method, applied in pulp beating method, pulp beating/refining method, papermaking and other directions, can solve problems such as difficulty in meeting electronic circuit boards, low qualified product rate of circuit boards, inconvenient recycling, etc. The effect of good high temperature resistance, good flatness and good air permeability
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Embodiment 1
[0021] Embodiment 1: High-temperature hot-pressed cushion paper
[0022] First, mix 25% broad wood chips and 75% coastal pine chips in the silo. After mixing evenly, the mixed wood chips are pulped through sulfate cooking and hydrogen peroxide micro-bleaching pulping technology. The ISO whiteness is controlled at 20 degrees to prepare a mixed slurry; then the mixed slurry is beaten through three conical mills in series, the beating degree is 15ºSR, the wet weight is 12 grams, and the beating concentration is 2.7%; The total dry weight of the slurry is 2% heat-resistant agent and 0.1% penetrant in the total dry weight of the slurry. The heat-resistant agent is urea, and the penetrant is fatty alcohol polyoxyethylene ether. The material is fed into the headbox, the opening of the lip of the headbox is 30.6mm, and double-sided dehydration is carried out by stacking the net to ensure that the fibers are evenly dispersed, and the vertical and horizontal fibers are arranged in an or...
Embodiment 2
[0024] A method for manufacturing high-temperature hot-pressed cushion paper, comprising the following steps:
[0025] Step (A), pulping: first mix 26% broadwood chips with 70% coastal pine chips to form mixed chips, then kraft cook the mixed chips to form pulp, and finally add to the pulp after kraft cooking The hydrogen peroxide of 1kg / ton of slurry is bleached, and the whiteness of slurry is controlled to be 20 degrees for pulping;
[0026] Step (B), beating: the slurry prepared in step (A) is beaten through a conical grinding and refining process, the beating concentration is 2.7%, and the beating degree of the slurry is 15 0 SR, the wet weight is 12g; the slurry after beating is introduced into the slurry tank;
[0027] Step (C), addition of auxiliary materials: add 2.0% of urea and 0.1% of fatty alcohol polyoxyethylene ether to the slurry after the beating process, and add the added auxiliary materials The slurry is sent into the headbox with a lip opening of 30.6mm; ...
Embodiment 3
[0032] A method for manufacturing high-temperature hot-pressed cushion paper, comprising the following steps:
[0033] Step (A), pulping: first mix 28% broadwood chips with 72% coastal pine chips to form mixed chips, then kraft cook the mixed chips to form pulp, and finally add to the pulp after kraft cooking The hydrogen peroxide of 3kg / ton of slurry is bleached, and the whiteness of slurry is controlled to be 21 degrees for pulping;
[0034] Step (B), beating: beat the slurry prepared in step (A) through a conical grinding and refining process, the beating concentration is 2.9%, and the beating degree of the slurry is 17 0 SR, the wet weight is 14g; the slurry after beating is introduced into the slurry tank;
[0035] Step (C), addition of auxiliary materials: add 3% of urea and 0.2% of fatty alcohol polyoxyethylene ether to the slurry after the beating process, and add the auxiliary materials The slurry is sent into the headbox with a lip opening of 30.6mm;
[0036] Step...
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Abstract
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