CN117403466A - 一种漂白商品木浆挂面的石膏板护面纸及其生产工艺 - Google Patents

一种漂白商品木浆挂面的石膏板护面纸及其生产工艺 Download PDF

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CN117403466A
CN117403466A CN202311579763.1A CN202311579763A CN117403466A CN 117403466 A CN117403466 A CN 117403466A CN 202311579763 A CN202311579763 A CN 202311579763A CN 117403466 A CN117403466 A CN 117403466A
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郭瑞芳
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Shanxi Qiangwei Paper Co ltd
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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
    • D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
    • D21H11/02—Chemical or chemomechanical or chemothermomechanical pulp
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B29/00—Layered products comprising a layer of paper or cardboard
    • B32B29/002—Layered products comprising a layer of paper or cardboard as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B29/005—Layered products comprising a layer of paper or cardboard as the main or only constituent of a layer, which is next to another layer of the same or of a different material next to another layer of paper or cardboard layer
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on 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
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20—Macromolecular organic compounds
    • D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
    • D21H17/24—Polysaccharides
    • D21H17/28—Starch
    • 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
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/63—Inorganic compounds
    • D21H17/66—Salts, e.g. alums
    • 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
    • D21H19/00—Coated paper; Coating material
    • D21H19/10—Coatings without pigments
    • 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
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/06—Paper forming aids
    • D21H21/10—Retention agents or drainage improvers
    • 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
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
    • D21H21/16—Sizing or water-repelling agents
    • 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
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
    • D21H21/18—Reinforcing agents
    • 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
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/30—Multi-ply

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Abstract

本发明涉及一种漂白商品木浆挂面的石膏板护面纸，包括上纸和下纸，所述下纸包括底层、芯层和面层，所述底层和芯层由OCC浆料制成；所述面层由漂白商品阔叶木浆制成，其中，所述漂白商品阔叶木浆由65‑75wt％化学浆和25‑35wt％化机浆组成。本发明通过漂白商品阔叶木浆制备面层，相对于ONP原料不需要脱墨处理，处理流程简单，降低了设备和人力成本；本发明通过采用65‑75wt％化学浆料和25‑35wt％化机浆料能够代替ONP原料制备面层，且不会影响生产速率，成本低。

Description

一种漂白商品木浆挂面的石膏板护面纸及其生产工艺
技术领域
本发明属于石膏板护面纸制备技术领域，特别涉及一种漂白商品木浆挂面的石膏板护面纸及其生产工艺。
背景技术
石膏板作为一种重要的装修材料，已经在装修行业中广泛应用。它具有环保、阻燃、隔音等优点，能够满足人们对于室内环境的要求，并且具备一定的安全性，随着人们环保意识的提高，石膏板这种环保性能较好的装修材料逐渐受到关注。石膏板不含有害物质，无异味，能够保证室内空气的健康，减少对人体的危害，而且石膏板可以进行回收再利用，符合可持续发展的要求。所以未来石膏板在装修行业中的应用将会进一步增加。
作为石膏板生产原材料之一的石膏板护面纸分上纸和下纸，护面下纸是指生产纸面石膏板时在成形皮带上承载石膏浆的纸板(即施工时露在外侧的那一面的纸，也称“面纸”)，面层一般用ONP浆脱墨后达到要求的白度进行挂面，底层用OCC浆抄造而成，面底能够明显地分辨，但随着智能手机和互联网的发展，越来越多人喜欢看电子书，对传统的纸质书籍、报纸、杂志的需求量越来越小。这就造成废旧报纸、书页纸、杂志等回收数量少，满足不了生产的需求，且这些回收回来的报纸等还需经过碎浆、除杂、脱墨等一系列处理才能达到产品质量的要求。
发明内容
本发明的目的在于提供一种漂白商品木浆挂面的石膏板护面纸，能够解决ONP原料缺少的问题；
为达到上述目的，本发明采用的技术方案是：
一种漂白商品木浆挂面的石膏板护面纸，包括上纸和下纸，所述下纸包括底层、芯层和面层，所述底层和芯层由OCC浆料制成；
所述面层由漂白商品阔叶木浆制成，其中，所述漂白商品阔叶木浆由65-75wt％化学浆和25-35wt％化机浆组成。
优选的，所述化学浆和化机浆的白度＞60％，叩解度≥10°SR，湿重为1-1.5g。
本发明的另一方面，提供一种制备上述漂白商品木浆挂面的石膏板护面纸的生产工艺，包括如下步骤：
S1、将65-75wt％化学浆料和25-35wt％化机浆料加水碎解，制成混合浆料；
S2、将混合浆料打浆至打浆度为20±2°SR；
S3、将步骤S2得到的混合浆料通过流送***形成浆液；
S4、将步骤S3得到的浆液通过流浆箱分散后喷射到网部的面层，网部的面层、底层和芯层通过网部脱水成型后，经过压榨、前烘、表胶、后烘、卷取后，得到石膏板护面纸。
优选的，所述步骤S3中，流送***中加入施胶剂、助留助滤剂、硫酸铝和浆内淀粉与混合浆料混合，其中硫酸铝的添加量为3-5kg/t纸。
优选的，所述步骤S4中，表胶用淀粉控制上胶浓度为面层18％，底层8％。
本发明通过漂白商品阔叶木浆制备面层，相对于ONP原料不需要脱墨处理，处理流程简单且不需要消耗化学品(双氧水、硅酸钠、脱墨酶)，降低了设备和人力成本；
本发明通过采用65-75wt％化学浆料和25-35wt％化机浆料能够代替ONP原料制备面层，且不会影响生产速率，成本低。
具体实施方式
以下结合具体实施例，对本发明做进一步说明。
本发明一种漂白商品木浆挂面的石膏板护面纸，包括上纸和下纸，所述下纸包括底层、芯层和面层，所述底层和芯层由OCC浆料制成；
所述面层由漂白商品阔叶木浆制成，其中，所述漂白商品阔叶木浆由65-75wt％化学浆和25-35wt％化机浆组成。
优选的，所述化学浆和化机浆的白度＞60％，叩解度≥10°SR，湿重为1-1.5g。
本发明的另一方面，还提供一种制备上述漂白商品木浆挂面的石膏板护面纸的生产工艺，包括如下步骤：
步骤S1、将65-75wt％化学浆料和25-35wt％化机浆料加水碎解，制成混合浆料；
具体的，原料采购杨木漂白商品木浆料，要求白度＞60％，叩解度≥10°SR，湿重为1-1.5g，其中杨木漂白商品木浆料包括杨木漂白化学浆料和杨木漂白化机浆料；
在进行具体实施时，在本发明中，化学浆料采用北京泊林中和新材料有限公司的杨木漂白化学浆料，化机浆料采用焦作瑞丰纸业有限公司的杨木漂白化机浆料，化学浆料和化机浆料检测数据如下表1所示，
表1
具体的，将65-75wt％化学浆料和25-35wt％化机浆料，优选70wt％化学浆料和30wt％化机浆料，经链板输送机到碎浆机加水碎解，制成浓度4％的混合浆料，然后通过高浓除渣器去除一些砂子等重杂质，避免现场堆放夹杂带入的杂质进入***，混合浆料经高浓除渣器后送到叩前浆塔；
步骤S2、将混合浆料打浆至打浆度为20±2°SR；
具体的，通过盘磨将混合浆料打浆形成打浆度为20±2°SR，因为杨木浆浆料比较细，盘磨进刀功率很低，简单地通过盘磨起到揉搓作用，过盘磨后的浆料送入浆塔备用，供造纸面层用。
步骤S3、将步骤S2得到的混合浆料通过流送***形成浆液；
具体的，所述步骤S3中，流送***中加入施胶剂、助留助滤剂、硫酸铝和浆内淀粉等功能性助剂与混合浆料混合，其中硫酸铝的添加量为3-5kg/t纸。
更具体的，将步骤S2得到的混合浆料通过流送***，即冲浆泵、网前筛后，形成浓度约为0.4％-0.8％的浆料，流送***加入施胶剂、助留助滤剂、硫酸铝、浆内淀粉等功能性助剂与与混合浆料混合后形成浆液，将浆液输送到流浆箱中，其中硫酸铝的添加量为3-5kg/t纸，为了确保流浆箱PH不超6.8。
步骤S4、将步骤S3得到的浆液通过流浆箱分散后喷射到网部的面层，网部的面层、底层和芯层通过网部脱水成型后，经过压榨、前烘、表胶、后烘、卷取后，得到石膏板护面纸；
具体的，浆液通过流浆箱分散后喷射到网部的面层，网部采用3层网(面、芯、底)，浆液专供面层挂面用，挂浆量控制在25g/m2左右，网部的芯层和底层为OCC浆料，通过网部重力脱水、真空脱水等达到10-14％的干度，压榨部由真空预压榨+2道大辊径压榨组成，出压部干度约为46％左右，经过前烘、表胶、后烘、压光、卷取，其中表胶用淀粉控制上胶浓度为面层18％，底层8％，面层浓度设定18％，是为了提高成纸强度，提高纸面光泽度，石膏板护面纸底层使用时要跟石膏接触，石膏晶体刺入纸内，为确保良好的粘接性能，反面浓度不宜太高，设定为8％，最后经复卷机复卷成要求规格和直径的纸卷，经链板输送机入库储存。
更具体的，上述OCC浆料制备如下步骤：将打包好的废纸先通过链板机输送碎浆机，加水搅拌碎解后，尾浆通过水力清渣机及圆筒筛回收纤维，塑料排出***；良浆送入高浓除渣器，除去大块石子后，打入浆塔备用，良浆通过分级筛分级后，形成长、短纤维浆料，长纤维浆料经过低浓除渣器去除细小砂砾后，经过精筛进一步筛选浆料，然后多盘浓缩机浓缩至10％的质量浓度后进入热分散***，控制温度100-105℃、盘磨间隙0.15mm，分散胶粘物，最后通过盘磨打浆形成打浆度为40±2°SR、浓度为4％的浆料备用；短纤维浆料经过低浓除渣器及多盘浓缩机后，通过高浓打浆形成打浆度为40-43°SR、浓度为4％的浆料备用，然后将浆料通过流送***，即冲浆泵、压力筛后，形成浓度为0.4％-0.8％的浆料通过流浆箱分散后喷射到网部的芯层和底层，其中流送***中在上浆泵前加入浆内淀粉2.5kg/吨纸、干强剂25-30kg/吨纸，冲浆泵后加入硫酸铝10-15kg/吨纸、ASA施胶剂2.5-3kg/吨纸，压力筛前加入干粉助留剂0.3-0.4kg/吨纸，压力筛后加入助滤剂0.6kg/吨纸。
将原料配比为100％化学浆、50％化学浆+50％化机浆、70％化学浆+30％化机浆分别制备护面纸下纸，进行试验，试验结果如表2所示，
表2
从表2可以看出，面层使用漂白商品木浆能达到生产护面下纸的要求，但是通过不同原料配比的试验，发现使用100％化学浆制备时，层间结合力差，面层分层，影响后续使用，不能满足造纸要求；50％化学浆+50％化机浆搭配，层间结合强度明显提高，但因化机浆比例高，表胶吸胶量大，后烘干燥受限，影响生产车速，且后烘缠缸严重；70％化学浆+30％化机浆介于上述中间，基本表现出的问题能被折中，虽然吸胶量大但不影响车速，层间结合强度也能满足≥200J/m2的要求。

Claims (5)

1.一种漂白商品木浆挂面的石膏板护面纸，包括上纸和下纸，所述下纸包括底层、芯层和面层，所述底层和芯层由OCC浆料制成；
其特征在于，所述面层由漂白商品阔叶木浆制成，其中，所述漂白商品阔叶木浆由65-75wt％化学浆和25-35wt％化机浆组成。
2.根据权利要求1所述的一种漂白商品木浆挂面的石膏板护面纸，其特征在于，所述化学浆和化机浆的白度＞60％，叩解度≥10°SR，湿重为1-1.5g。
3.一种制备如权利要求1或2所述的漂白商品木浆挂面的石膏板护面纸的生产工艺，其特征在于，包括如下步骤：
S1、将65-75wt％化学浆料和25-35wt％化机浆料加水碎解，制成混合浆料；
S2、将混合浆料打浆至打浆度为20±2°SR；
S3、将步骤S2得到的混合浆料通过流送***形成浆液；
S4、将步骤S3得到的浆液通过流浆箱分散后喷射到网部的面层，网部的面层、底层和芯层通过网部脱水成型后，经过压榨、前烘、表胶、后烘、卷取后，得到石膏板护面纸。
4.根据权利要求3所述的一种漂白商品木浆挂面的石膏板护面纸的生产工艺，其特征在于，所述步骤S3中，流送***中加入施胶剂、助留助滤剂、硫酸铝和浆内淀粉与混合浆料混合，其中硫酸铝的添加量为3-5kg/t纸。
5.根据权利要求3所述的一种漂白商品木浆挂面的石膏板护面纸的生产工艺，其特征在于，所述步骤S4中，表胶用淀粉控制上胶浓度为面层18％，底层8％。
CN202311579763.1A 2023-11-24 2023-11-24 一种漂白商品木浆挂面的石膏板护面纸及其生产工艺 Pending CN117403466A (zh)

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