JP2011219874A5

JP2011219874A5 -

Info

Publication number: JP2011219874A5
Application number: JP2010086468A
Authority: JP
Filing date: 2010-04-02
Publication date: 2012-02-09

Description

すなわち本発明によれば、以下の方法が提案される。
灰分を３０％以上含有させる化粧板用原紙の製造方法であって、湿潤紙力剤Ａの添加を行い撹拌してパルプスラリーを調成した後、さらに抄紙の直前に湿潤紙力剤Ｂを添加してから抄紙を行うものであり、
湿潤紙力剤Ｂが、１５％水溶液の粘度が、２２℃、６０ｒｐｍ条件下でのブルックフィールド粘度計で２５〜５０ｍＰａ・ｓであり、かつコロイド滴定によりｐＨ７で測定したカチオン電荷が１．０〜２．３ｍｅｑ／ｇであるポリアミドポリアミンエピクロロヒドリン系湿潤紙力剤であり、
湿潤紙力剤Ａの添加量を１００重量部とするとき湿潤紙力剤Ｂの添加量が５〜３０重量部であることを特徴とする、化粧板用原紙の製造方法。 That is, according to the present invention, the following method is proposed.
A method of manufacturing a veneer sheet to contain ash content more than 30%, after form a pulp slurry adjustment was stirred performs addition of wet strength agents A, a further wet strength agent B just before the paper Paper making after adding,
The wet paper strength agent B has a 15% aqueous solution viscosity of 25-50 mPa · s with a Brookfield viscometer under the conditions of 22 ° C. and 60 rpm, and a cationic charge measured at pH 7 by colloid titration of 1.0- A polyamide polyamine epichlorohydrin wet paper strength agent of 2.3 meq / g;
Amount of wet strength agent B when the amount of wet strength agents A and 100 parts by weight, characterized in that 5 to 30 parts by weight, manufacturing how the base paper for decorative board.

Claims

A method for producing a decorative board base paper containing ash content of 30% or more, after adding wet paper strength agent A and stirring to prepare a pulp slurry, then adding wet paper strength agent B just before papermaking The wet paper strength agent B has a 15% aqueous solution viscosity of 25-50 mPa · s on a Brookfield viscometer at 22 ° C. and 60 rpm, and a pH of 7 by colloid titration. Polyamide polyamine epichlorohydrin-based wet paper strength agent having a cationic charge of 1.0 to 2.3 meq / g measured in step 1. When the additive amount of wet strength material A is 100 parts by weight, the wet strength material An additive amount of B is 5 to 30 parts by weight.