CN104119600A - 一种矿物纤维填充高强度环保石头纸的制备方法 - Google Patents

一种矿物纤维填充高强度环保石头纸的制备方法 Download PDF

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CN104119600A
CN104119600A CN201410341418.9A CN201410341418A CN104119600A CN 104119600 A CN104119600 A CN 104119600A CN 201410341418 A CN201410341418 A CN 201410341418A CN 104119600 A CN104119600 A CN 104119600A
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density polyethylene
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宋旭
吕晓宁
高强
赵雅静
李昕忆
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Abstract

一种矿物纤维填充高强度环保石头纸，其原料由高密度聚乙烯、线性低密度聚乙烯树脂、无机粉体、非金属矿物纤维、发泡剂、抗氧剂、光稳定剂和助剂组合而成，以总物料用量之和为100重量份为基准原料配比如下：高密度聚乙烯10-15份、线性低密度聚乙烯树脂10-15份、无机粉体65-75份、非金属矿物纤维5份、发泡剂0.1-0.2份、抗氧剂0.1-0.2份、光稳定剂0.1-0.2份、助剂0-2份。经混料，密炼、造粒，成型制得。本发明提高了石头纸尺寸稳定性、耐热性、抗化学性、阻燃性和电绝缘性等性质。通过三层共挤工艺，比表面积大，达到降比重、改善硬度、改善纸质感、改善印刷效果和吸墨性等目的。

Description

一种矿物纤维填充高强度环保石头纸的制备方法
技术领域
本发明涉及造纸技术领域，特别是涉及一种矿物纤维填充高强度环保石头纸的制备方法。
背景技术
矿物纤维是从纤维状结构的矿物岩石中获得的纤维，主要组成物质为各种氧化物，如二氧化硅、氧化铝、氧化镁等，其主要来源为各类石棉，如温石棉，青石棉等。矿物纤维，它采用特选的玄武岩等矿石为原料，经特定的预处理、在 1500℃高温熔融、提炼抽丝、并经特殊的表面处理而成。 矿物纤维的软化点约1200℃，纤维外表平滑完整，使用安全性高不会造成人体伤害。将自然产生的白色纤维状矿石经纤维化超细粉碎、表面复合改性后用于制备活性造纸用新材料。矿物纤维不同于植物纤维，制备过程不产生任何环境污染，也不同于碳酸钙、滑石粉等无机粉体。它是介于植物短纤维与传统填料（多种无机粉体）之间的一种新型造纸材料。现已有报道将矿物纤维（以下简称矿纤）用于植物纤维造纸工艺中，但还没有报道将矿物纤维用于石头纸制造工艺中；石头纸相对传统的纤维制纸，有以下优点：1、产品生产工艺简单，耗能低；2、保护森林资源、生态资源和水资源；3、减少有毒有害物质的排放，无废弃物的排放，不含植物纤维，降低造纸成本。
现有的石头纸与植物纤维纸相比，存在抗拉强度低、不耐热的缺点，从而限制石头纸的使用范围和深加工工艺，本发明将矿物纤维经超细粉碎、表面复和改性添加到石头纸中，由于矿纤具有良好的尺寸稳定性、耐热性、抗化学性、阻燃性和电绝缘性，从而改善了石头纸的加工缺陷。
发明内容
本发明通过采用非金属矿物纤维部分代替无机粉体用作原料，提供一种矿物纤维填充高强度环保石头纸的制备方法，该矿物纤维石头纸可用作书写纸、墙壁纸、装饰装潢用纸以及高档的包装用纸。
采用的技术方案是：
一种矿物纤维填充高强度环保石头纸，其特征在于其原料主要由高密度聚乙烯（HDPE）、线性低密度聚乙烯树脂（LLDPE）、无机粉体、非金属矿物纤维、发泡剂、抗氧剂、光稳定剂和助剂组合而成，以总物料用量之和为100重量份为基准原料配比如下：
高密度聚乙烯          10-15份
线性低密度聚乙烯树脂  10-15份
无机粉体              65-75份
非金属矿物纤维        5份
发泡剂                0.1-0.2份
抗氧剂                0.1-0.2份
光稳定剂              0.1-0.2份
助剂                  0-2份。
一种矿物纤维填充高强度环保石头纸的制备方法，包括以下步骤：
（1）混料：先将无机粉体与非金属矿物纤维除湿，加入偶联剂和润滑剂进行表面活化处理后，加热温度为120-125℃，活化时间15-20分钟，并与助剂以及高密度聚乙烯、线性低密度聚乙烯树脂充分混匀；
（2）密炼、造粒：再将混合好的物料经过密炼、挤出、造粒工艺，得到矿物纤维填充石头纸专用粒料；
（3）成型：将步骤（2）得到的粒料通过三层共挤吹塑得到三层结构的矿物纤维填充石头纸。
上述的非金属矿物纤维包括：硅灰石纤维、石膏纤维、海泡石纤维、蛭石纤维、玻璃纤维、硅酸铝纤维，非金属矿物纤维长径比L/D≥10，平均粒径为10微米，白度≥82%，烧失量≤5%，外观形态为白色纤维粉末；
上述的无机粉体包括：碳酸钙、滑石粉、钛白粉、粉煤灰、硅酸钙、白炭黑、硅微粉、珍珠岩粉、氧化钙、粘土、透明粉，无机粉体的粒径范围为2-15微米；
上述的发泡剂包括：物理发泡剂碳酸氢钠、AC发泡剂、丁烷、戊烷的混合物；
上述的抗氧剂包括：叔丁基羟基茴香醚、叔二丁基羟基甲苯、抗氧剂CA、抗氧剂1010；
上述的光稳定剂包括：GW-783、GW-419、UV-329、UV-418的一种或两种混合物；
上述的助剂包括：增韧剂、润滑剂、偶联剂、防霉剂；
上述的增韧剂有ABS、SBS、CPE、EVA；润滑剂有PE蜡、EBS、石蜡、脂肪酸；偶联剂有：有机铬络合物偶联剂、硅烷偶联剂、钛酸酯偶联剂和铝酸脂偶联剂；防霉剂有：乙烯剂硅烷。
本发明的优点是：
1、矿物纤维填充石头纸通过添加无机矿物纤维，提高了纸张强度，石头纸横纵向拉伸强度可达到20MPa，并提高了石头纸尺寸稳定性、耐热性、抗化学性、阻燃性和电绝缘性等性质。
2、通过三层共挤工艺，可控发泡体系，得到的石头纸表面粗糙度适中，存在大量的微孔结构，比表面积大，达到降比重、改善硬度、改善纸质感、改善印刷效果和吸墨性等目的。
具体实施方式
实施例一
取无机粉体70份、非金属矿物纤维5份、线性低密度聚乙烯树脂（LLDPE）10份、高密度聚乙烯（HDPE）13.7份、发泡剂 0.1份、抗氧剂 0.1份、光稳定剂 0.1份、助剂1份。将无机粉体和非金属矿物纤维倒入高速混合机内，开启高速搅拌并加温，当无机粉体温度升至135℃时进行测水试验，试验合格后，开始加入助剂使其表面充分活化，依次加入助剂（发泡剂除外）以及高密度聚乙烯、线性低密度聚乙烯树脂，搅拌２分钟使物料完全混合均匀，放出混合物料后备用；将制得混合物料用密炼机密炼，密炼温度为160-180℃，再通过单螺杆挤出造粒机造粒，并收集粒料，所述的单螺杆挤出机的一段温度设定为160℃，二段155℃，三段150℃，四段150℃，五段155℃，六段160℃，七段160℃，其喂料速度设定为30转/分，主机转速为40转/分（不能超过45转/分）；再采用外、中、内三层复合挤出吹膜成型，将上述得到的粒料与发泡剂以一定的比例混合均匀 ，通过塑化挤出吹膜得到发泡石头纸，其中一层或两层为发泡层，可根据发泡剂的发泡温度和加工成型方法，以及发泡层组合不同，将加工温度控制在170-200℃。
实施例二
取无机粉体70份、非金属矿物纤维5份、线性低密度聚乙烯树脂（LLDPE）10.4份、高密度聚乙烯（HDPE）12份、发泡剂 0.2份、抗氧剂 0.2份、光稳定剂 0.2份、助剂2份。本例除用料配比与实施例一不同外，其余制作工艺同实施例一相同。
实施例三
取无机粉体70份、非金属矿物纤维5份、线性低密度聚乙烯树脂（LLDPE）14份、高密度聚乙烯（HDPE）10.5份、发泡剂 0.2份、抗氧剂 0.2份、光稳定剂 0.1份、助剂0份。本例除用料配比与实施例一不同外，其余制作工艺同实施例一相同。

Claims (9)

1.一种矿物纤维填充高强度环保石头纸，其特征在于其原料主要由高密度聚乙烯（HDPE）、线性低密度聚乙烯树脂（LLDPE）、无机粉体、非金属矿物纤维、发泡剂、抗氧剂、光稳定剂和助剂组合而成，以总物料用量之和为100重量份为基准原料配比如下：
高密度聚乙烯          10-15份
线性低密度聚乙烯树脂      10-15份
无机粉体              65-75份
非金属矿物纤维        5份
发泡剂                0.1-0.2份
抗氧剂                0.1-0.2份
光稳定剂              0.1-0.2份
助剂                  0-2份。
2.根据权利要求1所述的一种矿物纤维填充高强度环保石头纸，其特征在于所述的助剂包括增韧剂、润滑剂、偶联剂或防霉剂。
3.根据权利要求1所述的一种矿物纤维填充高强度环保石头纸，其特征在于所述的非金属矿物纤维包括：硅灰石纤维、石膏纤维、海泡石纤维、蛭石纤维、玻璃纤维、硅酸铝纤维，非金属矿物纤维长径比L/D≥10，平均粒径为10微米，白度≥82%，烧失量≤5%，外观形态为白色纤维粉末。
4.根据权利要求1所述的一种矿物纤维填充高强度环保石头纸，其特征在于所述的无机粉体包括碳酸钙、滑石粉、钛白粉、粉煤灰、硅酸钙、白炭黑、硅微粉、珍珠岩粉、氧化钙、粘土、透明粉或无机粉体的粒径范围为2-15微米。
5.根据权利要求1所述的一种矿物纤维填充高强度环保石头纸，其特征在于所述的发泡剂包括物理发泡剂碳酸氢钠、AC发泡剂、丁烷或戊烷的混合物。
6.根据权利要求1所述的一种矿物纤维填充高强度环保石头纸，其特征在于所述的抗氧剂包括叔丁基羟基茴香醚、叔二丁基羟基甲苯、抗氧剂CA或抗氧剂1010。
7.根据权利要求1所述的一种矿物纤维填充高强度环保石头纸，其特征在于所述的光稳定剂包括：GW-783、GW-419、UV-329、UV-418的一种或两种混合物。
8.根据权利要求1所述的一种矿物纤维填充高强度环保石头纸的制备方法，其特征在于包括以下步骤：
（1）混料：先将无机粉体65-75份与非金属矿物纤维5份除湿，加入偶联剂和润滑剂进行表面活化处理后，加热温度为120-125℃，活化时间15-20分钟，并与助剂0-2份以及高密度聚乙烯10-15份或线性低密度聚乙烯树脂10-15份充分混匀；
（2）密炼、造粒：再将混合好的物料经过密炼、挤出、造粒工艺，得到矿物纤维填充石头纸专用粒料；
（3）成型：将步骤（2）得到的粒料通过三层共挤吹塑得到三层结构的矿物纤维填充石头纸。
9.根据权利要求2所述的一种矿物纤维填充高强度环保石头纸，其特征在于所述的上述的增韧剂有ABS、SBS、CPE或EVA；润滑剂有PE蜡、EBS、石蜡或脂肪酸；偶联剂有：有机铬络合物偶联剂、硅烷偶联剂、钛酸酯偶联剂或铝酸脂偶联剂；防霉剂：乙烯剂硅烷。
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