WO2018010558A1 - 石膏板专用化纤玻纤薄毡及其制备方法 - Google Patents

石膏板专用化纤玻纤薄毡及其制备方法 Download PDF

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WO2018010558A1
WO2018010558A1 PCT/CN2017/091462 CN2017091462W WO2018010558A1 WO 2018010558 A1 WO2018010558 A1 WO 2018010558A1 CN 2017091462 W CN2017091462 W CN 2017091462W WO 2018010558 A1 WO2018010558 A1 WO 2018010558A1
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chemical
fiberglass
gypsum board
fiber
glass fiber
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PCT/CN2017/091462
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English (en)
French (fr)
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刘强
陈卫
陈勇
崔刚
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中材金晶玻纤有限公司
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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
    • D21H13/36—Inorganic fibres or flakes
    • D21H13/38—Inorganic fibres or flakes siliceous
    • D21H13/40—Inorganic fibres or flakes siliceous vitreous, e.g. mineral wool, glass fibres
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/02—Head boxes of Fourdrinier machines
    • D21F1/022—Means for injecting material into flow within the headbox
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/10—Wire-cloths
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F5/00—Dryer section of machines for making continuous webs of paper
    • D21F5/18—Drying webs by hot air
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G9/00—Other accessories for paper-making machines
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
    • D21H13/10—Organic non-cellulose fibres

Definitions

  • the invention belongs to the field of gypsum board wall surface decoration, and particularly relates to a chemical fiber glass fiber thin felt special for gypsum board and a preparation method thereof.
  • Gypsum board is an indispensable material for decoration.
  • the use of gypsum board will inevitably have problems such as waterproofness and dimensional stability.
  • traditional gypsum board is simple and easy, due to the characteristics of gypsum itself, it is poor in water resistance and crack resistance, and easy to suck. The tide is deformed, and it is easy to mold after moisture absorption, which seriously affects the decoration effect.
  • a paper veneer gypsum board was formed, which was characterized in that the veneer material was directly bonded to the gypsum board as a decorative panel or a face paper. Although some defects of the original gypsum board were improved, the paper veneer was easy to absorb moisture and deformed. Corrosion resistance and crack resistance are poor, and it is easy to mold after moisture absorption, which seriously affects the decoration effect.
  • the special chemical fiber glass fiber mat for gypsum board requires reasonable distribution of the pores of the chemical fiber glass fiber composite mat, and has a semi-permeable function to the coated gypsum mortar, thereby ensuring a firm bond between the coated thin felt and the gypsum board material.
  • the object of the present invention is to provide a chemical fiberglass fiberglass felt for gypsum board and a preparation method thereof, and the produced product has moderate stiffness, uniform fiber dispersion, stable thickness, small pores, low porosity, and moisture resistance stability, and the like.
  • the bonding strength between the fiber mat and the gypsum board, the thin gypsum mortar coating makes the veneer material breathable and not transparent, and is an ideal new gypsum board special coating product.
  • the invention relates to a chemical fiberglass fiberglass mat for gypsum board, comprising a fiber chopped strand, wherein the fiber chopped strand comprises two types of glass chopped strands and chemical fibers, wherein the glass fiber chopped strands are of a diameter 3 to 24 microns, length 6 to 24 mm; chemical fiber specifications are 3 to 12 microns in diameter and 6 to 24 mm in length.
  • the glass fiber chopped strands and the chemical fibers have a weight ratio of 1.0 to 3.0:1.
  • the fiber chopped strands consisted of 70% by weight of glass fiber chopped strands having a diameter of 9 microns, a length of 18 mm and 30% by weight of chemical fibers having a diameter of 10 microns and a length of 12 mm.
  • the gypsum board special chemical fiber glass fiber mat has a combustible content of 40 to 60 wt%, a mass per unit area of 80 to 120 g/m 2 , and a thickness of 0.4 to 1.0 mm.
  • the raw material further includes a binder comprising an acrylate and a coupling agent in a weight ratio of 100 to 200:1 to 5.
  • the method for preparing a chemical fiberglass fiberglass mat for a gypsum board comprises a slurry preparation step, wherein the slurry preparation step is to disperse a glass fiber chopped strand and a chemical fiber in white water to form a slurry, the pulp In the material, the glass fiber chopped strands account for 0.1% to 0.15% by weight.
  • the white water has a viscosity of 7.0 to 9.0 CP.
  • the invention further comprises a fiber forming process, wherein the dewatering in the fiber forming is divided into five dewatering zones, and the dewatering amount per hour from the first dewatering zone to the fifth dewatering zone is respectively: 300 to 500 m 3 , 600 to 800 m 3 , 800 ⁇ 1000 m 3 , 300 to 500 m 3 and 100 to 300 m 3 .
  • a wet felt impregnation process is also included, and the binder used for the impregnation is a binder emulsion obtained by mixing an acrylate and a coupling agent KH560, the mass percentage of the two is 80:1, and the concentration of the binder emulsion is 30 to 45 wt%.
  • the invention adopts a wet process, and the glass fiber chopped strands and the chemical fibers are matched in a certain ratio, and a new binder is used.
  • the mat Due to the use of two or more chopped fibers of different diameters and lengths, the mat is more compact and has a lower porosity, so that the coated gypsum mortar is in a semi-permeable state, thereby reducing the amount of gypsum mortar and reducing the quality of the gypsum board; gypsum mortar
  • the semi-permeable state makes the veneer material more tightly bonded to the gypsum board;
  • the thin gypsum mortar coating makes the veneer material breathable and not transparent, and the gas between the felt and the organic material can be used during the foaming of the organic material.
  • the improved binder formula not only improves the bonding strength between the fiber mat and the gypsum board, but also enhances the degree of bonding with the gypsum mortar.
  • the product produced by the invention has moderate stiffness, uniform fiber dispersion, stable thickness, small pores, low porosity and stability against moisture, and improves the bonding strength between the fiber mat and the gypsum board, and the thin gypsum mortar coating makes the product.
  • the veneer material is breathable and not transparent, and is an ideal new gypsum board special coating product.
  • Pure water is added to the stirring tank and the slurry tank, and the amount of water is kept constant in the subsequent production process.
  • a thickener, a dispersing agent, and a disintegrating agent are added to the pure water.
  • the foaming agent is made into white water and the viscosity is adjusted to 8.0CP.
  • the diameter of 9 micrometers, the length of 18 mm glass fiber chopped strands and the diameter of 10 micrometers, the length of 12 mm of chemical fibers are added to the white water and stirred uniformly to obtain a slurry, and the glass fiber chopped strands in the slurry The concentration was 0.12%.
  • the mass ratio of glass fiber to chemical fiber is 5:2.
  • Example dehydrating amount per hour of the five embodiments dewatering zone are: 400m 3, 800m 3, 800m 3, 400m 3 and 300m 3.
  • the slurry was stripped of most of the white water on the inclined mesh belt, and the glass fiber chopped strands were evenly distributed on the mesh belt to form a wet felt, at which time the wet felt contained 80% by weight.
  • the glass chopped strands and the white water which cannot be removed are taken away by the continuously running forming web, and the excess white water is removed by three forced suctions, at which time the wet mat contains 40% by weight.
  • the dehydrated glass fiber wet felt is fed onto the impregnated mesh belt, and the binder is pumped through the diaphragm to the overflow glue applicator above the impregnated mesh belt, and the binder under the overflow of the glue applicator is supersaturated and impregnated in the wet On the felt, the excess adhesive is removed from the two suction boxes, separated by the separation tank and returned to the circulating working tank.
  • the binder is a mixture of an acrylate emulsion and a coupling agent KH560, the weight percentage of which is 80:1.
  • the binder emulsion was formulated to have a concentration of 35%.
  • the hot air is passed through a convection drying method.
  • the drying furnace is composed of a preheating zone and five drying and solidifying zones.
  • Each curing zone is composed of a circulating fan and a natural gas burner, and the temperature of each zone can be independently controlled.
  • the moisture in each zone is discharged through a fan, and the drying temperature is automatically controlled by the computer.
  • a small number of small holes are evenly opened on the upper and lower hood of the drying furnace to ensure that the hot air is evenly blown onto the felt surface.
  • the felt After the curing furnace, the felt has reached the maximum strength. After the "S” roller and the longitudinal cutter roller reach the take-up shaft, the "S” roller can obtain a large tension for the coiling, but the tension is not transmitted to the curing furnace. Otherwise, the wet felt is very low and will not be produced.
  • the coiling adopts a double-station inflatable shaft, a jacket paper tube, and a double-sided tape wound around the paper tube. A certain length is reached, the roll is automatically changed, and the cross cutter automatically drops the cut felt. Longitudinal cutting blades can be installed on the slitting knife rolls and cut into different widths according to customer requirements. Finally, the inflation shaft is taken out to package the product.
  • the technical performance indicators of the obtained polyester glass fiber mat are as follows:
  • the difference from the first embodiment is that:
  • Two types of fiber chopped strands were selected, namely: glass fibers with a diameter of 12 microns and a length of 24 mm and chemical fibers with a diameter of 6 microns and a length of 16 mm, respectively, which were 3:1 by weight.
  • the weight ratio of acrylate to coupling agent in the binder used was 100:1.
  • the glass fiber chopped strand in the slurry disposing step was 0.1% by weight, and the white water viscosity was 9.0 CP.
  • the amount of dehydration per hour from the first dehydration zone to the fifth dehydration zone are: 500 m 3 , 600 m 3 , 900 m 3 , 300 m 3 and 200 m 3 , respectively .
  • the concentration of the binder emulsion disposed in the wet felt impregnation step was 30%.
  • the difference from the first embodiment is that:
  • Two types of fiber chopped strands are selected, namely: glass fibers with a diameter of 6 microns and a length of 12 mm and a diameter of 9 microns.
  • the chemical fiber of length 18 mm, the weight percentage of the two is: 2:1.
  • the weight ratio of acrylate to coupling agent in the binder used was 70:1.
  • the glass fiber chopped strand in the slurry disposing step was 0.15% by weight, and the white water viscosity was 7.0CP.
  • the amount of dehydration per hour from the first dehydration zone to the fifth dehydration zone are: 300 m 3 , 700 m 3 , 1000 m 3 , 500 m 3 and 100 m 3 , respectively .
  • the concentration of the binder emulsion disposed in the wet felt impregnation step was 45%.

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  • Inorganic Chemistry (AREA)
  • Paper (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)

Abstract

一种石膏板专用化纤玻纤薄毡及其制备方法，包括纤维短切丝，纤维短切丝包括玻璃纤维短切丝和化学纤维两类，其中玻璃纤维短切丝规格为直径3～24微米，长度6～24毫米；化学纤维规格为直径3～12微米，长度6～24毫米。

Description

石膏板专用化纤玻纤薄毡及其制备方法 技术领域
本发明属于石膏板墙面装饰领域，具体涉及一种石膏板专用化纤玻纤薄毡及其制备方法。
背景技术
随着经济的快速发展，人民生活水平不断提高，对办公、居住的环境要求越来越高，装饰装修行业异军突起，而且装修要求美观、高档。石膏板是装修必不可少的材料，石膏板的使用必然会存在防水性及尺寸稳定等问题，传统的石膏板虽然简便易行，但由于石膏本身的特点，抗水性和抗裂性差，易吸潮变形，而且吸潮后易霉变，严重影响装修效果。后来出现纸质贴面石膏板，特征在于石膏基板上粘接有贴面材料直接作为装饰面板或面纸，虽然改善了原有石膏板材的部分缺陷，但由于纸质贴面易吸潮变形，抗腐蚀性和抗裂性差，而且吸潮后易霉变，严重影响装修效果。
石膏板专用化纤玻纤薄毡要求化纤玻纤复合薄毡的孔隙分布合理，对涂覆的石膏砂浆具有半渗透功能，从而保证涂覆后的薄毡与石膏板材料粘结牢固。
发明内容
本发明的目的是提供一种石膏板专用化纤玻纤薄毡及其制备方法，生产的产品硬挺度适中，纤维分散均匀，厚度稳定，孔隙小，孔隙率低，兼有防潮稳定等优点，提高了纤维薄毡与石膏板材的结合强度，较薄的石膏砂浆涂层使得贴面材料透气而不透料，是理想新型石膏板专用涂覆产品。
本发明所述的一种石膏板专用化纤玻纤薄毡，包括纤维短切丝，所述的纤维短切丝包括玻璃纤维短切丝和化学纤维两类，其中玻璃纤维短切丝规格为直径3～24微米，长度6～24毫米；化学纤维规格为直径3～12微米，长度6～24毫米。
所述的玻璃纤维短切丝和化学纤维的重量占比为1.0～3.0:1。
所述的纤维短切丝由70wt％的直径9微米，长度18毫米的玻璃纤维短切丝和30wt％的直径10微米，长度12毫米的化学纤维组成。
所述的石膏板专用化纤玻纤薄毡的可燃物含量为40～60wt％，单位面积质量为80～120g/m2，厚度为0.4～1.0毫米。
原料还包括粘结剂，所述的粘结剂包括丙烯酸酯和偶联剂，二者的重量比为100～200:1～5。
所述的石膏板专用化纤玻纤薄毡的制备方法，包括浆料配制工序，所述的浆料配制工序为将玻璃纤维短切丝和化学纤维分散于白水中形成浆料，所述的浆料中，玻璃纤维短切丝所占的重量百分比为0.1～0.15％。
所述的白水粘度为7.0～9.0CP。
还包括纤维成型工序，所述的纤维成型中的脱水分为5个脱水区，从第一脱水区至第五脱水区每小时的脱水量分别为：300～500m3，600～800m3，800～1000m3，300～500m3和100～300m3。
还包括湿毡浸渍工序，浸渍所用的粘结剂为丙烯酸酯与偶联剂KH560混合而成的粘结剂乳液，二者的质量百分比为80:1，所述的粘结剂乳液的浓度为30～45wt％。
本发明采用湿法工艺，玻璃纤维短切丝和化学纤维按一定比例搭配，采用新型粘结剂，
由于采用两种以上不同直径和长度的短切纤维，使得薄毡更加密实，孔隙率低，使涂覆的石膏砂浆处于半渗透状态，从而减少石膏砂浆的用量，减轻石膏板材的质量；石膏砂浆的半渗透状态使得贴面材料与石膏板材的结合更紧密；较薄的石膏砂浆涂层使得贴面材料透气而不透料，在有机材料发泡过程中，毡和有机材料之间的气体可以透过涂层，但有机材料不会透过去，不会形成“空腔”；改进的粘结剂配方不仅提高了纤维薄毡与石膏板材的结合强度，而且增强了与石膏砂浆的结合度。
与现有技术相比，本发明的有益效果是：
本发明生产的产品硬挺度适中，纤维分散均匀，厚度稳定，孔隙小，孔隙率低，兼有防潮稳定等优点，提高了纤维薄毡与石膏板材的结合强度，较薄的石膏砂浆涂层使得贴面材料透气而不透料，是理想新型石膏板专用涂覆产品。
具体实施方式
下面结合实施例对本发明做进一步说明。
实施例1
制备石膏板专用化纤玻纤薄毡，步骤如下：
1，浆料配制：
在搅拌罐和浆料罐中加入纯水，并且在以后的生产过程中维持水量不变，为了将玻璃纤维短切丝分散成单丝状态，在纯水中加入增稠剂、分散剂、消泡剂，制成白水，调节其粘度为8.0CP。
白水配制完成后，分别称量直径9微米，长度18毫米玻璃纤维短切丝和直径10微米，长度12毫米化学纤维加入白水中搅拌均匀，制得浆料，浆料中玻璃纤维短切丝的浓度为0.12％。
其中，玻璃纤维和化学纤维的质量比为5:2。
2，纤维成型：
匀浆器周围均匀分布有二十八根出浆管，浆料经出浆管均匀送入网前箱，网前箱内有阶梯扩散器和孔板对浆料进行横向均匀布浆，网前箱内有五个脱水区，每个脱水区对应一个脱水管道，通过控制脱水管道上的阀门，使各脱水区的脱水量呈合理的曲线分布。该实施例中五个脱水区每小时的脱水量分别为：400m3，800m3，800m3，400m3和300m3。
浆料在倾斜的网带上被脱除大部分白水，玻璃纤维短切丝均匀地分布在网带上形成湿毡，此时湿毡中含水80wt％。玻璃纤维短切丝和不能被脱除的白水被连续运行的成型网带带走，再经三道强制抽吸抽掉多余的白水，此时湿毡含水40wt％。两侧有气针可控制湿毡的宽度，切除的湿毛边进入白水池回收再利用。纵向加筋以提高纵向拉伸断裂强力。
3，湿毡浸渍：
将脱水后的玻璃纤维湿毡送入浸渍网带上，粘结剂经隔膜泵送到浸渍网带上方的溢流施胶器，从施胶器溢流下的粘结剂过饱和地浸渍在湿毡上，多余的粘结剂由两道抽吸箱抽去，经分离罐分离后重新回到循环工作罐中。
所述的粘结剂为丙烯酸酯乳液与偶联剂KH560的混合液，二者的重量百分比为80：1。所配制的粘结剂乳液的浓度为35％。
4，烘干：
采用热风穿透对流烘干方式，烘干炉由一个预热区，五个烘干固化区组成，每个固化区都由一台循环风机和天然气燃烧器，每个区的温度可以独立控制，每个区的湿气通过一台风机集中排出，烘干温度通过计算机自动控制，在烘干炉的上下风罩上均匀开设很多小孔，保证热风均匀地吹到毡面上。
5，卷取：
出固化炉后毡已经达到最大强力，经过“S”辊、纵切刀辊到达卷取轴，“S”辊可以使卷取获得较大的张力，但张力不致于传到固化炉内。否则，湿毡强力很低将无法生产。卷取采用双工位气胀轴，外套纸管，纸管外面缠绕双面胶带。达到一定的长度，自动换卷，横切刀自动落下切断毡。纵切刀刀辊上可安装纵切刀片，根据客户要求分切成不同的宽度。最后抽出气胀轴对产品进行包装。
所制得的聚酯玻纤薄毡的技术性能指标如下：
Figure PCTCN2017091462-appb-000001
Figure PCTCN2017091462-appb-000002
实施例2
该实施例的聚酯玻纤薄毡的技术性能指标如下：
Figure PCTCN2017091462-appb-000003
该种保温板专用玻璃纤维薄毡的制备方法中，与实施例1的不同在于：
选用两种规格的纤维短切丝，分别为：直径12微米长度24毫米的玻璃纤维和直径6微米长度16毫米的化学纤维，二者的重量百分比分别为：3:1。
采用的粘结剂中的丙烯酸酯和偶联剂的重量比为100:1。
浆料配置工序中的玻璃纤维短切丝所占的重量百分比为0.1％，所配置的白水粘度为9.0CP。
纤维成型中，从第一脱水区至第五脱水区每小时的脱水量分别为：500m3，600m3，900m3，300m3和200m3。
湿毡浸渍工序中所配置的粘结剂乳液的浓度为30％。
实施例3
该实施例的聚酯玻纤薄毡的技术性能指标如下：
Figure PCTCN2017091462-appb-000004
该种保温板专用玻璃纤维薄毡的制备方法中，与实施例1的不同在于：
选用两种规格的纤维短切丝，分别为：直径6微米长度12毫米的玻璃纤维和直径9微米 长度18毫米的化学纤维，二者的重量百分比分别为：2:1。
采用的粘结剂中的丙烯酸酯和偶联剂的重量比为70:1。
浆料配置工序中的玻璃纤维短切丝所占的重量百分比为0.15％，所配置的白水粘度为7.0CP。
纤维成型中，从第一脱水区至第五脱水区每小时的脱水量分别为：300m3，700m3，1000m3，500m3和100m3。
湿毡浸渍工序中所配置的粘结剂乳液的浓度为45％。

Claims (9)

  1. 一种石膏板专用化纤玻纤薄毡，包括纤维短切丝，其特征在于：所述的纤维短切丝包括玻璃纤维短切丝和化学纤维两类，其中玻璃纤维短切丝规格为直径3～24微米，长度6～24毫米；化学纤维规格为直径3～12微米，长度6～24毫米。
  2. 根据权利要求1所述的石膏板专用化纤玻纤薄毡，其特征在于：所述的玻璃纤维短切丝和化学纤维的重量占比为1.0～3.0:1。
  3. 根据权利要求2所述的石膏板专用化纤玻纤薄毡，其特征在于：所述的纤维短切丝由70wt％的直径9微米，长度18毫米的玻璃纤维短切丝和30wt％的直径10微米，长度12毫米的化学纤维组成。
  4. 根据权利要求1所述的石膏板专用化纤玻纤薄毡，其特征在于：所述的石膏板专用化纤玻纤薄毡的可燃物含量为40～60wt％，单位面积质量为80～120g/m2，厚度为0.4～1.0毫米。
  5. 根据权利要求1所述的石膏板专用化纤玻纤薄毡，其特征在于：还包括粘结剂，所述的粘结剂包括丙烯酸酯和偶联剂，二者的重量比为100～200:1～5。
  6. 一种权利要求1所述的石膏板专用化纤玻纤薄毡的制备方法，其特征在于：包括浆料配制工序，所述的浆料配制工序为将玻璃纤维短切丝和化学纤维分散于白水中形成浆料，所述的浆料中，玻璃纤维短切丝所占的重量百分比为0.1～0.15％。
  7. 根据权利要求6所述的石膏板专用化纤玻纤薄毡的制备方法，其特征在于：所述的白水粘度为7.0～9.0CP。
  8. 根据权利要求7所述的石膏板专用化纤玻纤薄毡的制备方法，其特征在于，还包括纤维成型工序，所述的纤维成型中的脱水分为5个脱水区，从第一脱水区至第五脱水区每小时的脱水量分别为：300～500m3，600～800m3，800～1000m3，300～500m3和100～300m3。
  9. 根据权利要求8所述的石膏板专用化纤玻纤薄毡的制备方法，其特征在于：还包括湿毡浸渍工序，浸渍所用的粘结剂为丙烯酸酯与偶联剂KH560混合而成的粘结剂乳液，二者的质量百分比为80:1，所述的粘结剂乳液的浓度为30～45wt％。
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