阅读说明：本技术 一种尺寸稳定且恢复性优良的特种纸及其制备方法 (Special paper with stable size and excellent recovery performance and preparation method thereof ) 是由 延海平 韩旭霞 于 2019-09-04 设计创作，主要内容包括：本发明涉及尺寸稳定且恢复性优良的纸及其制备方法,纸张包括木浆纤维60-80、矿物填料3-5、润湿剂3-5、消泡剂2-5,其特征在于,还包括氨基硅烷5-10、糖醇5-10。通过在纸浆中添加氨基硅烷和糖醇,可以赋予纸张在纸张所在平面上的X、Y两个方向上一定的微弹性,这一微弹性可以有效缓解纸张在遇水或潮湿环境中的膨胀变形,同时,还可以缓解纸张被再次干燥而脱水后,纸张因膨胀变形而产生的起泡、褶皱形状,改善纸张的恢复性。(The invention relates to paper with stable size and excellent restorability and a preparation method thereof, wherein the paper comprises 60-80 parts of wood pulp fiber, 3-5 parts of mineral filler, 3-5 parts of wetting agent and 2-5 parts of defoaming agent, and is characterized by further comprising 5-10 parts of aminosilane and 5-10 parts of sugar alcohol. By adding amino silane and sugar alcohol into the paper pulp, certain micro-elasticity can be given to the paper in X, Y two directions on the plane of the paper, the micro-elasticity can effectively relieve the expansion deformation of the paper in water or wet environment, and simultaneously can relieve the foaming and wrinkle shapes of the paper due to the expansion deformation after the paper is dried again and dehydrated, thereby improving the recovery of the paper.)

1. The preparation method of the paper with stable dimension and good recovery is characterized in that the formula comprises 70 parts by mass of wood pulp fiber, 4 parts by mass of mineral filler, 4 parts by mass of wetting agent and 4 parts by mass of defoaming agent, and is characterized by further comprising 8 parts by mass of amino silane and 8 parts by mass of sugar alcohol; the preparation method comprises the steps of adding wood pulp fibers, mineral fillers, wetting agents, defoaming agents, aminosilane and sugar alcohol into a pulper according to the formula, pulping, papermaking, screening, pressing, drying, calendaring, paper winding, cutting and packaging; the amino silane is hydrolyzed to obtain silanol, the silanol is combined with hydroxyl on the surface of the sugar alcohol and then dehydrated, the silanol is combined with the sugar alcohol, amino in the amino silane is bonded with cellulose in wood pulp fibers, the cross-linking stability between the cellulose in paper is improved, meanwhile, the paper is endowed with certain micro-elasticity in two directions of X, Y on the plane where the paper is located, the micro-elasticity effectively relieves the expansion deformation of the paper in the water or the humid environment, meanwhile, after the paper is dried again and dehydrated, the paper is in a shape of bubbles and folds caused by the expansion deformation, and the restorability of the paper is improved.

2. The process according to claim 1, wherein the sugar alcohol has the formula HOCH2[ CH (OH) ]4CH2 OH.

3. The production method according to claim 3, characterized in that the wood pulp fibers comprise softwood pulp and hardwood pulp, and the mass ratio of the softwood pulp to the hardwood pulp is 40: 60; the aminosilane is gamma-aminopropyltriethoxysilane.

Technical Field

The invention relates to special paper with stable size and excellent restorability and a preparation method thereof, belongs to the field of papermaking, and can be applied to wallpaper.

Background

Ordinary paper can expand and deform when meeting water due to swelling of cellulose, and can also expand and deform in a humid environment due to gradual absorption of moisture by cellulose. For paper to be applied to wallpaper, it is generally desirable that it has good dimensional stability, and does not undergo too large an expansion deformation even when it is exposed to water or humid air.

Disclosure of Invention

In order to solve the technical problems, the invention provides paper with stable size and good recovery, which utilizes the coupling characteristic of an amino silane coupling agent, simultaneously hydrolyzes amino silane to obtain silanol, combines with hydroxyl on the surface of sugar alcohol to be dehydrated, can be jointed with the sugar alcohol, bonds amino in the amino silane and cellulose in wood pulp fiber, can improve the crosslinking stability between the cellulose in the paper, and simultaneously can endow the paper with certain micro-elasticity in X, Y two directions on the plane of the paper, the micro-elasticity can effectively relieve the expansion deformation of the paper in water or a humid environment, and simultaneously can relieve the foaming and wrinkle shapes of the paper caused by the expansion deformation after the paper is dried again and dehydrated, thereby improving the recovery of the paper.

The paper with stable size and good recovery property comprises 60-80 parts by weight of wood pulp fiber, 3-5 parts by weight of mineral filler, 3-5 parts by weight of wetting agent and 2-5 parts by weight of defoaming agent, and is characterized by further comprising 5-10 parts by weight of aminosilane and 5-10 parts by weight of sugar alcohol.

Wherein the sugar alcohol has the general formula of HOCH₂[CH(OH)]_nCH₂OH, wherein n =2, 3, 4, 5.

Wherein the wood pulp fiber comprises needle pulp and broad leaf pulp, and the mass ratio of the needle pulp to the broad leaf pulp is preferably 40-60: 60-40.

Wherein the aminosilane is selected from one or more of gamma-aminopropyltrimethoxysilane, gamma-aminopropyltriethoxysilane, N-beta (aminoethyl) -gamma-aminopropyltrimethoxysilane, N-beta (aminoethyl) -gamma-aminopropylmethyldimethoxysilane, N-beta (aminoethyl) -gamma-aminopropyltriethoxysilane and N-beta (aminoethyl) -gamma-aminopropylmethyldiethoxysilane. Preferably gamma-aminopropyltrimethoxysilane or gamma-aminopropyltriethoxysilane.

A preparation method of paper with stable size and good recovery performance comprises the steps of adding wood pulp fibers, mineral fillers, wetting agents, defoaming agents, aminosilane and sugar alcohol into a pulper according to the formula, pulping, papermaking, net surfing, squeezing, drying, press polishing, paper winding, cutting and packaging.

According to the invention, through adding aminosilane and sugar alcohol into paper pulp, the self coupling characteristic of the aminosilane is utilized, the high molecular compounds of cellulose and starch can be coupled together, particularly, the aminosilane is hydrolyzed to obtain silanol, the silanol is combined with hydroxyl on the surface of the sugar alcohol to be dehydrated and can be jointed with the sugar alcohol, amino in the aminosilane is bonded with cellulose in wood pulp fiber, the crosslinking stability between the cellulose in paper can be improved, meanwhile, certain micro-elasticity can be given to the paper in X, Y two directions on the plane of the paper, the micro-elasticity can effectively relieve the expansion deformation of the paper in water or a humid environment, and meanwhile, the foaming and wrinkle shapes of the paper caused by the expansion deformation after the paper is dried again and dehydrated can be relieved, and the recovery performance of the paper is improved.

Detailed Description

In order to better demonstrate the technical effects of the present invention, the following detailed description and illustrations are given in conjunction with the preferred embodiments and the corresponding comparative examples.