CN105885451B - 一种发泡多孔木塑复合材料及其制备方法 - Google Patents

一种发泡多孔木塑复合材料及其制备方法 Download PDF

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CN105885451B
CN105885451B CN201610380686.0A CN201610380686A CN105885451B CN 105885451 B CN105885451 B CN 105885451B CN 201610380686 A CN201610380686 A CN 201610380686A CN 105885451 B CN105885451 B CN 105885451B
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姚义俊
万韬隃
孙姓
温晓霞
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Zhaoqing Luka Building Materials Co., Ltd.
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Abstract

一种发泡多孔木塑复合材料,由下列重量份的原料制成:高密度聚乙烯35‑45份,木粉40‑50份,无机微粉5‑10份,相容剂0.5‑2份,阻燃剂1‑2份,增塑剂2‑5份,润滑剂1‑2份,着色剂0.5‑1.5份,抗菌剂0.5‑2份,发泡剂1‑2份,发泡稳定剂1‑2份。本发明将以上原料按配方比例在混料器中进行混合,使各组分分散均匀之后,然后投入双螺杆挤出机中熔融挤出造粒,其制备流程简单、工艺简单可控、生产效率高,制备发泡多孔木塑材料性能优越、性价比高,具有广泛的市场应用前景。

Description

一种发泡多孔木塑复合材料及其制备方法
技术领域
本发明属于木塑复合材料领域,具体涉及一种发泡多孔木塑复合材料及其制备方法。
背景技术
木塑复合材料是由热塑性聚合物与木屑或木粉、植物纤维粉等共混,并添加各种加工助剂,经过高温混炼再经挤出、模压、注射等成型加工而制得的一种环保复合材料。该材料成本低,可广泛应用于建筑、交通、轻工业等部门,具有广阔的市场前景和环保价值。木塑复合材料也有一些不足,木塑复合材料的密度通常为实木材料密度的两倍,且价格较高等,因而其使用范围受到了很大的局限。所以,对传统木塑复合材料进行改性,降低其密度、降低其成本就十分必要。
发明内容
本发明的针对现有技术中的不足,提供一种发泡多孔木塑复合材料及其制备方法。
为实现上述目的,本发明采用以下技术方案:
一种发泡多孔木塑复合材料,其特征在于,由下列重量份的原料制成:高密度聚乙烯35-45份,木粉40-50份,无机微粉5-10份,相容剂0.5-2份,阻燃剂1-2份,增塑剂2-5份,润滑剂1-2份,着色剂0.5-1.5份,抗菌剂0.5-2份,发泡剂1-2份,发泡稳定剂1-2份。
为优化上述技术方案,采取的具体措施还包括:
所述高密度聚乙烯采用密度为0.949 g/cm3、熔体流动速率为0.8g/10min的白色颗粒。
所述木粉长度<1mm,灰分含量≤11%,含水率<5%,耐热能力为230℃,颗粒细度为60-80目。
所述无机微粉为表面改性的凹土粉末,颗粒细度为200-300目,脱色率≥90%,含水率<5%。
所述相容剂为马来酸酐接枝聚乙烯;所述阻燃剂为层状硅酸铝,颗粒细度为300-400目;所述增塑剂为硅烷偶联剂;所述润滑剂为液体石蜡;所述着色剂为二氧化钛、炭黑、氧化铁红、氧化铁黄和群青中的至少一种;所述抗菌剂为抗菌防霉剂;所述发泡剂为ADC发泡剂;所述发泡稳定剂为发泡稀土钙锌稳定剂。
此外,还提出了上述发泡多孔木塑复合材料的制备方法,其特征在于,包括以下步骤:
1)物料的称料:按照下列重量份配方分别称取各组分:高密度聚乙烯35-45份,木粉40-50份,无机微粉5-10份,相容剂0.5-2份,阻燃剂1-2份,增塑剂2-5份,润滑剂1-2份,着色剂0.5-1.5份,抗菌剂0.5-2份,发泡剂1-2份,发泡稳定剂1-2份;
2)物料的混合:将称取的各组分放入高速搅拌机进行混合混料处理,得到混合物料;
3)物料的熔融挤出:将所述混合物料用平行双螺杆挤出机制备出造粒料,造粒加工温度为150-250℃,转速为160-200转/分钟;将制好的造粒料加入锥形双螺杆挤出机,主机转速为3-10转/分钟,温度为140℃-185℃,模具温度为150-170℃,进行挤出生产,经发泡模具发泡并冷却定型,成型发泡多孔木塑复合材料。
本发明的有益效果是:将聚乙烯、木粉、无机微粉、相容剂、阻燃剂、润滑剂、增塑剂、着色剂、抗菌剂以及发泡剂和发泡稳定剂按照配方比例在混料器中进行混合,使各组份充分分散均匀之后,然后投入双螺杆挤出机中熔融挤出造粒,其制备流程简单、工艺简单可控、生产效率高,制备发泡多孔木塑材料性能优越、性价比高,具有广泛的市场应用前景。
附图说明
图1为本发明的制备流程图。
具体实施方式
现在结合附图对本发明作进一步详细的说明。
本发明的发泡多孔塑木材料,由下列重量份的原料制成:高密度聚乙烯35-45份,木粉40-50份,无机微粉5-10份,相容剂0.5-2份,阻燃剂1-2份,增塑剂2-5份,润滑剂1-2份,着色剂0.5-1.5份,抗菌剂0.5-2份,发泡剂1-2份,发泡稳定剂1-2份。
其中,高密度聚乙烯(HDPE):白色颗粒,密度0.949g/cm3,熔体流动速率0.8g/10min(2.16kg,190℃);
木粉:长度均<1mm,灰分含量≤11%,含水率<5%,耐热能力为230℃(短时间可达280℃),颗粒细度60-80目;
无机微粉:采用凹土粉末,颗粒细度200-300目,脱色率》90%,含水率<5%,对其进行表面改性,制成改性凹土粉末;
相容剂:马来酸酐接枝聚乙烯(MAPE),用量为2%(以塑料用量为基准);
阻燃剂:采用层状硅酸铝,颗粒细度300-400目;
增塑剂:选择硅烷偶联剂KH-550;
润滑剂:选择液体石蜡;
着色剂:选择二氧化钛、炭黑、氧化铁红、氧化铁黄、群青中的至少一种;
抗菌剂:抗菌防霉剂;
发泡剂:ADC发泡剂;
发泡稳定剂:发泡稀土钙锌稳定剂。
为了降低密度并提高气孔率,使得发泡多孔木塑复合材料具有良好的可加工性能,在制备中添加了适量无机填料,优选地,无机填料选择为改性凹土粉末,在发泡木塑复合材料制备工艺中,改性凹土粉末具有非常好的高温稳定性和润滑性,能够有效降低各组分之间的摩擦力,促进各组分的均匀化,并在相容剂和润滑剂的作用下,将聚乙烯和木粉混合均匀,在发泡剂和发泡稳定剂的作用下,制成多孔均匀的多泡木塑复合材料。关于所用的改性凹土粉末的制备工艺方法,在中国专利文件CN102627872A(公开日2012-08-08)中有明确说明。
此外,阻燃剂所采用的层状硅酸铝,具有很大的比表面积,阻燃效果突出,能有效地消除燃烧延续所需的活性物质,如轻基游离基等,阻碍了氧气进入木塑表层以及表层降解的产物扩散到气相中。
实施例1:
1、物料的称料:按照高密度聚乙烯35份,木粉50份,无机微粉5份,相容剂1份,阻燃剂1份,增塑剂2份,润滑剂2份,着色剂0.5份,抗菌剂0.5份,发泡剂2份,发泡稳定剂1份的配方分别称取各组分;
2、物料的混合:将所称取的各组分放入高速搅拌机进行混合混料处理,得到混合物料;
3、物料的熔融挤出:将混合物料用平行双螺杆挤出机制备出造粒料,造粒加工温度为200℃,转速为160转/分钟;将制好的造粒料加入锥形双螺杆挤出机,主机转速为7转/分钟,温度为145℃,模具温度为150℃,进行挤出生产,经发泡模具发泡并冷却定型,成型发泡多孔木塑复合材料。
实施例2:
1、物料的称料:按照高密度聚乙烯40份,木粉40份,无机微粉8份,相容剂2份,阻燃剂1份,增塑剂2份,润滑剂1份,着色剂1份,抗菌剂1份,发泡剂2份,发泡稳定剂2份的配方分别称取各组分;
2、物料的混合:将所称取的各组分放入高速搅拌机进行混合混料处理,得到混合物料;
3、物料的熔融挤出:将混合物料用平行双螺杆挤出机制备出造粒料,造粒加工温度为250℃,转速为200转/分钟;将制好的造粒料加入锥形双螺杆挤出机,主机转速10转/分钟,温度为185℃,模具温度为170℃,进行挤出生产,经发泡模具发泡并冷却定型,成型发泡多孔木塑复合材料。
未发泡的木塑复合材料装饰板材密度为1.25g/cm3,本发明的发泡多孔木塑复合材料密度为0.76 g/cm3,显著降低了木塑的密度,达到实木材料密度,具有更好的适用性。
而未发泡木塑复合材料装饰板材冲击强度为5.4kJ/m2,本发明的发泡多孔木塑复合材料板材冲击强度为9.1kJ/m2,冲击强度得到显著的提高,更显著促进发泡多孔木塑复合材料的应用。
以上仅是本发明的优选实施方式,本发明的保护范围并不仅局限于上述实施例,凡属于本发明思路下的技术方案均属于本发明的保护范围。应当指出,对于本技术领域的普通技术人员来说,在不脱离本发明原理前提下的若干改进和润饰,应视为本发明的保护范围。

Claims (1)

1.一种发泡多孔木塑复合材料的制备方法,其特征在于,发泡多孔木塑复合材料由下列重量份的原料制成:高密度聚乙烯35-45份,木粉40-50份,无机微粉5-10份,相容剂0.5-2份,阻燃剂1-2份,增塑剂2-5份,润滑剂1-2份,着色剂0.5-1.5份,抗菌剂0.5-2份,发泡剂1-2份,发泡稳定剂1-2份;
制备工艺包括以下步骤:
1)物料的称料:按照下列重量份配方分别称取各组分:高密度聚乙烯35-45份,木粉40-50份,无机微粉5-10份,相容剂0.5-2份,阻燃剂1-2份,增塑剂2-5份,润滑剂1-2份,着色剂0.5-1.5份,抗菌剂0.5-2份,发泡剂1-2份,发泡稳定剂1-2份;
所述高密度聚乙烯采用密度为0.949 g/cm3、熔体流动速率为0.8g/10min的白色颗粒;所述木粉长度<1mm,灰分含量≤11%,含水率<5%,耐热能力为230℃,颗粒细度为60-80目;所述无机微粉为表面改性的凹土粉末,颗粒细度为200-300目,脱色率≥90%,含水率<5%;所述相容剂为马来酸酐接枝聚乙烯;所述阻燃剂为层状硅酸铝,颗粒细度为300-400目;所述增塑剂为硅烷偶联剂;所述润滑剂为液体石蜡;所述着色剂为二氧化钛、炭黑、氧化铁红、氧化铁黄和群青中的至少一种;所述抗菌剂为抗菌防霉剂;所述发泡剂为ADC发泡剂;所述发泡稳定剂为发泡稀土钙锌稳定剂;
2)物料的混合:将称取的各组分放入高速搅拌机进行混合混料处理,得到混合物料;
3)物料的熔融挤出:将所述混合物料用平行双螺杆挤出机制备出造粒料,造粒加工温度为150-250℃,转速为160-200转/分钟;将制好的造粒料加入锥形双螺杆挤出机,主机转速为3-10转/分钟,温度为140℃-185℃,模具温度为150-170℃,进行挤出生产,经发泡模具发泡并冷却定型,成型发泡多孔木塑复合材料。
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