CN104960173A - 一种凹凸木纹木塑型材的制备方法 - Google Patents

一种凹凸木纹木塑型材的制备方法 Download PDF

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CN104960173A
CN104960173A CN201510414933.XA CN201510414933A CN104960173A CN 104960173 A CN104960173 A CN 104960173A CN 201510414933 A CN201510414933 A CN 201510414933A CN 104960173 A CN104960173 A CN 104960173A
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许世华
李靖
何军
马长城
戴东花
严永刚
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JIANGSU XUHUA SHENGLUODI BUILDING MATERIAL CO Ltd
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Abstract

本发明公开了一种凹凸木纹木塑型材的制备方法，使用的木塑造粒料共挤层的表层和芯层材质一致，避免了材质不一致导致的脱落；在挤出机主机第四区或合流芯处开孔，挤出机辅机和主机的第四区或者合流芯相连接，则避免了使用成本较高的共挤模具；另外在线压花，可以使得木塑表面凹凸不平，压花辊上有雕刻木纹，压下去与共挤的木纹配合，木纹具有深浅层次感强。

Description

一种凹凸木纹木塑型材的制备方法
技术领域
本发明涉及一种木塑型材，具体涉及一种凹凸木纹木塑型材的制备方法，属于材料领域。
背景技术
随着生产技术的进步以及人们对生活环境的要求越来越高，环保型木塑产品在越来越多的领域中得到应用。目前木塑的外观分为几大类：一类是素面，无木纹纹路；一类是表面打磨后压花，压花压力和温度较低，只能是结皮浅压花，无凹凸纹理，较死板，无法满足高端客户的需求；还有一类是共挤木塑，表层是ASA或PMMA，芯层是木塑，尽管表面具有木纹，但需要共挤机和模具相连，每种模具需要特殊设计和加工，共挤模具成本比普通模具成本高至少30%，且共挤层和木塑相容性较差，使用过程容易脱落。
发明内容
解决的技术问题：针对现有技术存在的不足，本发明提供了一种凹凸木纹木塑型材的制备方法，挤出机辅机与主机的第四区、合流芯相连接，避免了使用成本较高的共挤模具，并使用在线压花机压出凹凸木纹。
技术方案：本发明提供的凹凸木纹木塑型材的制备方法，其特征在于包括以下制备步骤：
（1）以重量份数计，将HDPE 50-80份、马来酸酐3-15份、TGDM 10-20份、三烯丙基异三聚氰酸酯5-15份、DCP 0.5-2份，经平行双螺杆造粒机改性成多元复合相容剂；将废旧HDPE 40-60份、废旧PP 10-20份、废旧PET 10-20份、废旧PA6 10-20份、多元复合相容剂5-20份，经造粒机反应改性得到改性塑料合金；将环氧丙烯酸树脂3-20份、秸秆粉75-95份、马来酸酐2-20份，经混合反应得到改性秸秆粉；将改性塑料合金25-40份、改性秸秆粉50-65份、润滑剂1-5份、氧化铁黄2-10份、氧化铁红2-10份通过平行双螺杆造粒机造粒得木塑造粒料A；
（2）将步骤（1）所得木塑造粒料A加入质量分数0.2-50%的色母，经冷混机混合3-30分钟得到造粒料B，将木塑造粒料A通过双螺杆挤出机主机成型，造粒料B通过单螺杆挤出机辅机成型，所述单螺杆挤出机辅机与所述双螺杆挤出机主机的第四区或合流芯相连接，造粒料B通过连接处与木塑造粒料A汇合，造粒料B包裹在造粒料A外层，通过空心立柱的模具成型，表层厚度2mm，具有色母流动形成的木纹；
（3）模具出来的型材通过在线压花机压出木纹，经冷却、切割，再利用拉丝辊去除表面塑料结皮层，即得到本发明的凹凸木纹木塑型材。
步骤（3）所述在线压花机为双辊或四辊，双辊为两根压花辊上下排列，至少有一辊带有木纹图案；四辊为两根压花辊上下排列，两根压花辊左右排列，其中上下排列的压花辊可以在左右排列的压花辊前方或后方，上下排列压花辊和左右排列压花辊均至少有一辊带有木纹图案。
步骤（2）所述色母的基材为PA、PET、PP、PE、PVC的一种或几种混合；步骤（2）所述色母的颜色为黄色、红色、黑色、蓝色、紫色的一种或几种混合。
有益效果：（1）本发明使用的木塑造粒料共挤层的表层和芯层材质一致，避免了材质不一致导致的脱落；
（2）在挤出机主机第四区或合流芯处开孔，挤出机辅机和主机的第四区或者合流芯相连接，避免了使用成本较高的共挤模具；
（3）在线压花可以使得木塑表面凹凸不平，压花辊上有雕刻木纹，压下去与共挤的木纹配合，木纹具有深浅层次感强；
（4）经过改性的木塑材料强度较高，避免在线压花的高压力将其压裂。
附图说明
图1为实施例1制备工艺流程示意图；
图2为实施例2制备工艺流程示意图。
具体实施方式
下面通过实施例的方式进一步说明本发明，但本发明的保护范围并不因此局限于下述实施例，而是本发明的说明书和权利要求书限定。
实施例1
（1）将HDPE 70份、马来酸酐 10份、TGDM 10份、三烯丙基异三聚氰酸酯 9份、DCP 1份，经平行双螺杆造粒机改性成多元复合相容剂；将废旧HDPE 50份、废旧PP 10份、废旧PET 10份、废旧PA6 20份、多元复合相容剂 10份，经造粒机反应改性得到改性塑料合金；将环氧丙烯酸树脂5份、秸秆粉90份、马来酸酐5份，经混合反应得到改性秸秆粉；将改性塑料合金 30份、改性秸秆粉 60份、润滑剂5份、氧化铁黄3份、氧化铁红2份通过平行双螺杆造粒机造粒得造粒料A。
（2）将造粒料A加入3%的PA6基黑色母，经冷混机混合5分钟出料得造粒料B；将造粒料A加入锥形双螺杆挤出机主机中挤出，将造粒料B加入单螺杆挤出机辅机中挤出，单螺杆挤出机辅机的机头与双螺杆挤出机主机的合流芯相连，两机相互垂直；造粒料A和造粒料B在合流芯处汇流，造粒料B包裹在造粒料A外层，通过空心立柱的模具成型，表层厚度2mm，具有PA6基黑色母流动形成的木纹。
（3）在模具出口处，木塑立柱先通过在线压花机的上下辊，紧接着通过左右辊，上下和左右压花辊均刻有木纹，温度均为160℃，压力为1MPa，形成具有深浅变化的仿真木纹。木塑立柱经过冷却，再利用拉丝辊去除表面塑料结皮层，即得到凹凸木纹木塑型材。
实施例2
（1）将HDPE 50份、马来酸酐15份、TGDM 20份、三烯丙基异三聚氰酸酯13份、DCP 2份，经平行双螺杆造粒机改性成多元复合相容剂；将废旧HDPE 40份、废旧PP 10份、废旧PET 20份、废旧PA6 20份、多元复合相容剂 10份，经造粒机反应改性得到改性塑料合金；将环氧丙烯酸树脂10份、秸秆粉85份、马来酸酐5份，经混合反应得到改性秸秆粉；将改性塑料合金40份、改性秸秆粉 50份、润滑剂5份、氧化铁红5份通过平行双螺杆造粒机造粒得造粒料A。
（2）将造粒料A加入10%的PET基红色色母和PP基黑色色母，经冷混机混合25分钟出料得造粒料B；将造粒料A加入锥形双螺杆挤出机主机中挤出，将造粒料B加入单螺杆挤出机辅机中挤出，单螺杆挤出机辅机的机头与双螺杆挤出机第四区相连，两机相互垂直；造粒料A和造粒料B在第四区汇流，造粒料B包裹在造粒料A外层，通过空心立柱的模具成型，表层厚度2mm，具有黑色和红色色母流动形成的木纹。
（3）在模具出口处，木塑立柱先通过在线压花机的上下辊，紧接着通过左右辊，上下和左右压花辊均刻有木纹，温度均为165℃，压力为1.5MPa，形成具有深浅变化的仿真木纹。木塑立柱经过冷却，再利用拉丝辊去除表面塑料结皮层，即得到凹凸木纹木塑型材。
对实施例1~2所得凹凸木纹木塑型材的性能进行测试，测试结果如下：
测试项目 实施例1 实施例2 市场上普通木塑
抗弯强度 78MPa 82MPa 22-30MPa
抗冲击强度 25kj/m2 27kj/m2 3-5kj/m2

Claims (4)

1.一种凹凸木纹木塑型材的制备方法，其特征在于包括以下制备步骤：
（1）以重量份数计，将HDPE 50-80份、马来酸酐3-15份、TGDM 10-20份、三烯丙基异三聚氰酸酯5-15份、DCP 0.5-2份，经平行双螺杆造粒机改性成多元复合相容剂；将废旧HDPE 40-60份、废旧PP 10-20份、废旧PET 10-20份、废旧PA6 10-20份、多元复合相容剂5-20份，经造粒机反应改性得到改性塑料合金；将环氧丙烯酸树脂3-20份、秸秆粉75-95份、马来酸酐2-20份，经混合反应得到改性秸秆粉；将改性塑料合金25-40份、改性秸秆粉50-65份、润滑剂1-5份、氧化铁黄2-10份、氧化铁红2-10份通过平行双螺杆造粒机造粒得木塑造粒料A；
（2）将步骤（1）所得木塑造粒料A加入质量分数0.2-50%的色母，经冷混机混合3-30分钟得到造粒料B，将木塑造粒料A通过双螺杆挤出机主机成型，造粒料B通过单螺杆挤出机辅机成型，所述单螺杆挤出机辅机与所述双螺杆挤出机主机的第四区或合流芯相连接，造粒料B通过连接处与木塑造粒料A汇合，造粒料B包裹在造粒料A外层，通过空心立柱的模具成型，表层厚度2mm，具有色母流动形成的木纹；
（3）模具出来的型材通过在线压花机压出木纹，经冷却、切割，再利用拉丝辊去除表面塑料结皮层，即得到本发明的凹凸木纹木塑型材。
2.根据权利要求1所述的凹凸木纹木塑型材的制备方法，其特征在于，步骤（3）所述在线压花机为双辊或四辊，双辊为两根压花辊上下排列，至少有一辊带有木纹图案；四辊为两根压花辊上下排列，两根压花辊左右排列，其中上下排列的压花辊可以在左右排列的压花辊前方或后方，上下排列压花辊和左右排列压花辊均至少有一辊带有木纹图案。
3.根据权利要求1所述的凹凸木纹木塑型材的制备方法，其特征在于，步骤（2）所述色母的基材为PA、PET、PP、PE、PVC的一种或几种混合。
4.根据权利要求1所述的凹凸木纹木塑型材的制备方法，其特征在于，步骤（2）所述色母的颜色为黄色、红色、黑色、蓝色、紫色的一种或几种混合。
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