CN107254091A - 一种高硬度pvc光面木塑板及其制备方法 - Google Patents

一种高硬度pvc光面木塑板及其制备方法 Download PDF

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CN107254091A
CN107254091A CN201710516494.2A CN201710516494A CN107254091A CN 107254091 A CN107254091 A CN 107254091A CN 201710516494 A CN201710516494 A CN 201710516494A CN 107254091 A CN107254091 A CN 107254091A
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方晓钟
肖磊
马岩
姚红焱
高威威
贾红滢
徐民
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Anhui Guofeng Wood Plastic Technology Co Ltd
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Abstract

一种阻燃高导热高硬度光面木塑板，其特征在于，所述木塑板组份按重量份组成为：竹粉30‑40份，高密度聚乙烯80‑100份，KH550硅烷偶联剂0.3‑0.5份，润滑剂6‑8份，稳定剂2‑4份，发泡剂2‑3份，氧化铝3‑4份，二氧化硅2‑4份，废弃陶瓷粉体3‑6份，膨胀型阻燃剂33‑36份，协效剂5‑6份，改性石墨5‑7份。本发明木塑复合材料，充分利用了竹制品边角料制成的竹粉，在一定程度上缓解了木材资源匮乏的压力，而且竹粉的加入使得木塑板的硬度增大；其次加入废弃陶瓷粉体，氧化铝，二氧化硅能够极大的增强木塑材料的硬度、强度和阻燃等性能。

Description

一种高硬度PVC光面木塑板及其制备方法
技术领域
本发明涉及一种高硬度PVC光面木塑板及其制备办法，涉及木塑复合材料的制备。
背景技术
随着工业化程度的加快，我国木材资源越来越匮乏，满足不了市场的需求。木塑复合材料是一种用木粉、木纤维或其它植物纤维填充热塑性聚合物复合材料,兼有木材和塑料的优点，可以代替木材在家装、建筑等领域作为建材原料。木塑由于其环保、成型效率高、防水、耐候性好等优点，近年来发展的越来越快，但由于其力学强度低，抗冲击能力较差，硬度较低等缺点导致其在应用上受到限制。
发明内容
本发明的目的是一种高硬度光面木塑板及其加工方法，该木塑板以竹粉、HDPE、人造石粉，氧化镁、二氧化硅为主要原料，辅以各种助剂，通过发泡，挤出等技术制备得到的木塑板表面光滑，硬度大，抗冲击能力强，可广泛用于家装、建筑等材料中。
本发明解决技术问题采用如下技术方案：
一种高硬度光面木塑板，其特征在于，所述木塑板组份按重量份组成为：竹粉30-40份，高密度聚乙烯80-100份，KH550硅烷偶联剂0.3-0.5份，润滑剂6-8份，稳定剂2-4份，发泡剂2-3份，氧化铝3-4份，二氧化硅2-4份，废弃陶瓷粉体3-6份，膨胀型阻燃剂33-36份，协效剂5-6份，改性石墨5-7份。
进一步，所述竹粉为废弃竹制品边角料磨粉所得，细度为80-100目。
进一步，所述HDPE树脂熔融指数为1.5g/10min。
进一步，所述润滑剂为聚乙烯蜡、硬脂酸锌以3:2的比例混合得到。
进一步，所述稳定剂为硬脂酸钙。
进一步，所述发泡剂为白发泡剂，碳酸氢钠。
所述膨胀型阻燃剂为聚磷酸铵(APP)和季戊四醇(PER)以2:1混合物。
所述协效剂为MgO，可膨胀石墨(EG)，SiO2混合物。
(MgO)、(EG)、(SiO2)之间质量配比为1∶4∶3-1:6:5。
一种木塑墙板制备方法，按如下步骤进行：
1)将细度为80目的竹粉在160℃条件下进行绝干处理，含水率控制在2-5％以内。
2)对绝干后的竹粉进行浸渍改性处理，将丙烯酸丁酯、过氧化苯甲酰，N-二甲基苯胺混合均匀后加入干燥后的竹粉中，50℃下聚合反应280min使之均一化,冷却后备用。
3)将废弃陶瓷粉体，二氧化硅，氧化铝混合均匀，加入硅烷偶联剂研磨分散均匀得到混合粉体,再加入硬酯酸锌和聚乙酸钠，膨胀型阻燃剂、协效剂、改性石墨，加热至熔融，再加入硬脂酸钙稳定剂，混合加热后制成颗粒备用。
4)将高密度聚乙烯置于混合机中，温度为60℃时加入发泡剂和泡孔调节剂混合至均匀,再加如浸渍改性后的竹粉搅拌均匀，所得即为干混料。
5)将步骤得到的干混料送入挤出机中,挤出成型即可得到木塑复合材料。
与已有技术相比，本发明有益效果体现在：
本发明木塑复合材料，充分利用了竹制品边角料制成的竹粉，在一定程度上缓解了木材资源匮乏的压力，而且竹粉的加入使得木塑板的硬度增大；其次加入废弃陶瓷粉体，氧化铝，二氧化硅能够极大的增强木塑材料的硬度、强度和阻燃等性能；另外，对竹粉进行浸渍改性处理，解决了植物纤维与树脂之间界面结合性能较差的问题，浸渍后的竹粉与树脂之间界面粘结性能良好，从而提高了木塑复合材料的力学强度。
具体实施方式
原料：
竹粉40份，高密度聚乙烯100份，KH550硅烷偶联剂0.5份，润滑剂8份，稳定剂2份，发泡剂2份，氧化铝3份，二氧化硅4份，废弃陶瓷粉体6份，竹粉改性剂4份；膨胀型阻燃剂33份，协效剂5份，改性石墨7份。
其中，竹粉细度为80目，HDPE树脂熔融指数为1.5g/10min,偶联剂为KH550硅烷偶联剂；润滑剂为聚乙烯蜡、硬脂酸钙、硬脂酸锌以3:1:2的比例混合得到；稳定剂为硬脂酸钙；竹粉改性剂为丙烯酸丁酯、过氧化苯甲酰，N-二甲基苯胺以1:1:2的比例混合得到，发泡剂为白发泡剂碳酸氢钠。
制备方法：
1)将细度为80目的竹粉在160℃条件下进行绝干处理，含水率控制在2-5％以内。
2)对绝干后的竹粉进行浸渍改性处理，将丙烯酸丁酯、过氧化苯甲酰，N-二甲基苯胺按质量比1:1:2的比例混合均匀后加入干燥后的竹粉中，50℃下聚合反应280min使之均一化,冷却后备用。
3)将废弃陶瓷粉体，二氧化硅，氧化铝混合均匀，加入硅烷偶联剂研磨分散均匀得到混合粉体,再加入硬酯酸锌、聚乙酸钠、膨胀型阻燃剂33份，协效剂5份，改性石墨，加热至熔融，再加入硬脂酸钙稳定剂，混合加热后制成颗粒备用。
4)将高密度聚乙烯置于混合机中，温度为60℃时加入发泡剂和泡孔调节剂混合至均匀,再加如浸渍改性后的竹粉搅拌均匀，所得即为干混料。
5)将步骤得到的干混料送入挤出机中,其中挤出工艺为一区温度为155℃,二区温度为175℃,三区温度为195℃,四区温度为190℃,机头温度为180℃,转子转速为50r/pm,挤出成型即可得到木塑复合材料。
性能测试结果如下表所示：
其中，木塑板氧指数(％)为62，热导率(w/(m*K))为1.35；阻燃防火性能达到GB8624-2006《建筑材料及制品燃烧性能分级》中规定的阻燃C级或B级要求，物理力学性能达到GB11718-2009规定要求。
以上实施例中，若无特别说明，其组分均为市购现有技术产品。
对于本领域技术人员而言，显然本发明不限于上述示范性实施例的细节，而且在不背离本发明的精神或基本特征的情况下，能够以其他的具体形式实现本发明。因此，无论从哪一点来看，均应将实施例看作是示范性的，而且是非限制性的，本发明的范围由所附权利要求而不是上述说明限定，因此旨在将落在权利要求的等同要件的含义和范围内的所有变化囊括在本发明内。
此外，应当理解，虽然本说明书按照实施方式加以描述，但并非每个实施方式仅包含一个独立的技术方案，说明书的这种叙述方式仅仅是为清楚起见，本领域技术人员应当将说明书作为一个整体，各实施例中的技术方案也可以经适当组合，形成本领域技术人员可以理解的其他实施方式。

Claims (3)

1.一种阻燃高导热高硬度光面木塑板，其特征在于，所述木塑板组份按重量份组成为：竹粉30-40份，高密度聚乙烯80-100份，KH550硅烷偶联剂0.3-0.5份，润滑剂6-8份，稳定剂2-4份，发泡剂2-3份，氧化铝3-4份，二氧化硅2-4份，废弃陶瓷粉体3-6份，膨胀型阻燃剂33-36份，协效剂5-6份，改性石墨5-7份。
2.根据权利要求1所述的一种阻燃高导热高硬度光面木塑板，其特征在于，所述改性石墨制备方法：将石墨于110℃下烘干后加入高速混合机中，低速搅拌升温至100℃，分三次将含有3-氨基丙基三乙氧基硅烷的乙醇溶液滴加入高速混合机中，用量为石墨质量的5％，高速搅拌约后，停止搅拌，冷却后出料，改性后的石墨在110℃下干燥24h备用。
3.一种阻燃高导热高硬度光面木塑板，其特征在于，按如下步骤进行：
1)将细度为80目的竹粉在160℃条件下进行绝干处理，含水率控制在2-5％以内；
2)对绝干后的竹粉进行浸渍改性处理，将丙烯酸丁酯、过氧化苯甲酰，N-二甲基苯胺混合均匀后加入干燥后的竹粉中，,混合均匀后加入干燥后的竹粉中，50℃下聚合反应280min使之均一化,冷却后备用；
3)将废弃陶瓷粉体，二氧化硅，氧化铝混合均匀，加入硅烷偶联剂研磨分散均匀得到混合粉体,再加入硬酯酸锌和聚乙酸钠，膨胀型阻燃剂、协效剂、改性石墨，加热至熔融，再加入硬脂酸钙稳定剂，混合加热后制成颗粒备用。
4)将高密度聚乙烯置于混合机中，温度为60℃时加入发泡剂和泡孔调节剂混合至均匀,再加入浸渍改性后的竹粉搅拌均匀，所得即为干混料。
5)将步骤得到的干混料送入挤出机中,挤出成型即可得到木塑复合材料。
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CN113234290A (zh) * 2021-05-08 2021-08-10 江西省建筑卫生陶瓷质量监督检验中心 一种废弃陶瓷复合建筑材料及其制备方法和应用

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103102591A (zh) * 2013-01-30 2013-05-15 广东省微生物研究所 一种环保型防霉木塑复合材料及其制备方法
CN103289426A (zh) * 2012-02-22 2013-09-11 深圳市格林美高新技术股份有限公司 Hdpe微发泡塑木复合材料及其制备方法
CN105086249A (zh) * 2015-08-26 2015-11-25 安徽北马科技有限公司 一种pvc广告板

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103289426A (zh) * 2012-02-22 2013-09-11 深圳市格林美高新技术股份有限公司 Hdpe微发泡塑木复合材料及其制备方法
CN103102591A (zh) * 2013-01-30 2013-05-15 广东省微生物研究所 一种环保型防霉木塑复合材料及其制备方法
CN105086249A (zh) * 2015-08-26 2015-11-25 安徽北马科技有限公司 一种pvc广告板

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113234290A (zh) * 2021-05-08 2021-08-10 江西省建筑卫生陶瓷质量监督检验中心 一种废弃陶瓷复合建筑材料及其制备方法和应用

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Application publication date: 20171017