CN104262779A - 退役汽车聚烯烃塑料零部件化学发泡回收再利用方法 - Google Patents
退役汽车聚烯烃塑料零部件化学发泡回收再利用方法 Download PDFInfo
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Abstract
本发明提供的退役汽车聚烯烃塑料零部件化学发泡回收再利用方法,是一种通过化学发泡再利用退役汽车聚烯烃塑料零部件制备微孔发泡材料的方法。本发明将注塑微孔发泡技术应用到汽车塑料回收再利用领域中,克服了现有技术的不足,解决了报废汽车塑料回收难题,实现了汽车聚烯烃塑料资源化回收再利用、减少了环境污染,得到的产品能耗低,附加值高,具有广阔的应用前景。
Description
技术领域
本发明涉及一种退役汽车聚烯烃塑料零部件通过化学发泡得到微孔发泡材料的回收再利用方法。
技术背景
聚烯烃类材料具有成本低、耐腐蚀、易成型等优点,广泛应用于保险杠、仪表盘、燃油箱等汽车塑料件中,已成为汽车中用量最大的塑料品种。目前,各国汽车聚烯烃塑料用量增长迅速,日本乘用车聚烯烃塑料使用比例已高达70%,欧美汽车聚烯烃使用量每年以超过10%的速度增长,我国聚烯烃塑料使用量也在快速增加。随着技术的进步,改性聚烯烃材料性能不断提高,可用于替代PVC、ABS等多种材料,有望实现聚烯烃材料统一汽车塑料。因此,回收汽车零部件中的聚烯烃塑料意义重大。
然而,退役汽车使用周期通常在10年以上,长期曝露在室外条件下,光、氧、热、水等的环境因素的综合作用会使汽车塑料发生老化,流动性、强度、韧性发生下降,难以达到同级利用的要求。目前,大部分国外报废汽车塑料是作为汽车破碎残余物(ASR)进行处理,美国ASR的处理方式主要是填埋,欧洲和日本的处理方式为填埋或热量回收。废旧塑料回收再利用的途径包括材料回收、化学回收、能量回收。化学回收,能量回收技术复杂、成本高,难以大规模应用。材料回收得到的原料通常性能发生下降,只能降级做一些对性能要求不高的部件。
微孔发泡材料是特指孔径小于100um,孔密度大于1.0×106个/cm3的多孔聚合物发泡材料。由于其具有较小的孔径,较高的孔密度,聚合物微孔发泡材料除了具有质轻省料的优点外,还具有良好的韧性。
目前,微孔发泡方法主要有超临界发泡和化学发泡,超临界发泡是将超临界气体作为发泡剂,需要专用的注塑机和超临界气体设备,生产成本较高。化学发泡法是的将化学发泡剂加入树脂后加热保压分解出气体而发泡,其优点是其设备专用性要求不强,可直接在普通的挤出机和注塑机上进行发泡,无需购置新的设备,生产成本低。
发明内容
本发明要解决的技术问题是:提供一种退役汽车聚烯烃塑料零部件化学发泡回收再利用方法,以解决目前报废汽车塑料回收难题,实现汽车聚烯烃塑料资源化回收再利用,达到减少环境污染的目的。
本发明解决其技术问题采用以下的技术方案:
本发明提供的退役汽车聚烯烃塑料零部件化学发泡回收再利用方法,其包括以下步骤:
(1)将拆解得到的退役汽车聚烯烃零部件进行清洗、破碎
(2)将清洗破碎得到的回收料置于高速混合机内,与添加的无机填料0.1-15重量份、相容剂0.1-5重量份、抗氧剂0.1-5重量份进行共混5-30min
(3)将共混好的回收料混合物按如下工艺通过双螺杆挤出机挤出造粒得到回收料母粒:一区160-190℃,二区170-200℃,三区200-230℃,四区190-220℃,五区180-210℃,机头温度180-210℃,螺杆转速30-200r/min
(4)将偶氮二甲酰胺(AC)发泡剂与低密度聚乙烯(LDPE)按质量比1:4~1:10置于高速混合机中共混5-30min;
(5)将共混好的发泡剂混合物按如下工艺通过双螺杆挤出机挤出造粒得到回收料母粒:一区110-140℃,二区120-150℃,三区130-160℃,四区130-150℃,五区120-150℃,机头120-150℃,螺杆转速10-50r/min
(6)将发泡母粒与回收料母粒按质量比1:20~1:50混合均匀后如下工艺注塑成型得到微孔发泡材料:注塑温度180-220℃,注塑压力30-90MPa,注塑速度5-15g·s-1,冷却时间10-40s
所述聚烯烃零部件包括PP保险杠、PP仪表盘、HDPE油箱等PP和PE汽车塑料部件
所述相容剂用于提高回收料与无机填料的相容性,改善制品力学性能,相容剂可以选用钛酸酯偶联剂131与201、硅烷偶联剂KH550与KH570、马来酸酐接枝聚丙烯(PP-g-MAH)、马来酸改接枝聚乙烯(PE-g-MAH)中的一种。
所述的抗氧剂用于保持回收料加工过程中的稳定性和提高制品的抗老化性。可以选用1010、168、B215中的一种。
所述无机填料用于提高发泡率与模量,可以选用≥1250目的滑石粉、碳酸钙、蒙脱土中的一种。
本发明与现有的汽车塑料回收技术相比具有以下主要的优点:
1)该方法避免了焚烧填埋带来的资源浪费与环境污染,能耗低、附加值高、不产生二次污染,工艺简单可靠,适用于大批量回收报废汽车聚烯烃塑料塑料,易于实现工业化,促进了汽车行业的可持续发展,具有很高的经济价值。
2)回收塑料由于发生老化,韧性与模量均下降,但微孔注塑制件由于内部存在细小而均匀的泡孔,韧性得到提高,同时,无机填料既增加了发泡率,还使制件的模量得到提高;
3)由于内部存在细小的泡孔,制品的重量减小,既节省了材料,又降低了生产成本;
4)微孔注射成型不需要传统注射成型所需的额外保压阶段,缩短了成型周期,提高了生产效率;
5)微孔注射成型均匀分布气泡压力可使模腔内熔体与模壁贴合紧密,能有效减小缩痕和翘曲变形,提高制品尺寸精度。
附图说明
图1、图2是实施案例2的回收料微孔发泡SEM图。
图3、图4是实施案例5的回收料微孔发泡SEM图。
图5、图6是实施案例8的回收料微孔发泡SEM图。
具体实施方式
本发明解决退役汽车聚烯烃塑料回收再利用问题,利用化学发泡的方法,将注塑微孔发泡技术应用到汽车塑料回收再利用领域中,克服了现有技术的不足,提供了一种退役汽车聚烯烃塑料回收再利用新工艺,解决了报废汽车塑料回收难题,实现了汽车聚烯烃塑料资源化回收再利用、减少了环境污染,得到的产品能耗低,附加值高,具有广阔的应用前景。
下面结合实施例及附图对本发明作进一步说明,但本发明并不限于以下实例,相同形式的微孔发泡回收再利用退役汽车聚烯烃塑料部件方法均属于本发明的保护之内。
实施例1:退役汽车聚烯烃塑料零部件化学发泡回收再利用方法
该方法包括如下步骤:
(1)将拆解得到的退役汽车聚丙烯保险杠进行清洗、破碎;
(2)将清洗破碎得到的保险杠回收料置于高速混合机内,与0.1重量份的1250目碳酸钙、0.1重量份的钛酸酯偶联剂131、抗氧剂1010共混5min;
(3)将共混好的保险杆回收料混合物按如下工艺通过双螺杆挤出机挤出造粒得到回收料母粒:一区160℃,二区170℃,三区200℃,四区190℃,五区180℃,机头温度180℃,螺杆转速30r/min;
(4)将AC发泡剂与低密度聚乙烯(LDPE)按质量比1:4置于高速混合机中共混5min;
(5)将共混好的发泡剂混合物按如下工艺通过双螺杆挤出机挤出造粒得到发泡母粒:一区110℃,二区120℃,三区130℃,四区130℃,五区120℃,机头120℃,螺杆转速10r/min;
(6)将发泡母粒与回收料母粒按质量比1:20混合均匀后如下工艺注塑成型得到微孔发泡测试样条:注塑温度180℃,注塑压力30MPa,注塑速度5g·s-1,冷却时间10s;
(7)根据相关标准测定所得聚丙烯保险杠回收料微孔发泡材料性能如表1所示。
实施例2:退役汽车聚烯烃塑料零部件化学发泡回收再利用方法
该方法包括如下步骤:
(1)将拆解得到的退役汽车PP保险杠进行清洗、破碎;
(2)将清洗破碎得到的保险杠回收料置于高速混合机内,与8重量份的2500目碳酸钙、2重量份的硅烷偶联剂KH550、抗氧剂168共混15min;
(3)将共混好的回收料混合物按如下工艺通过双螺杆挤出机挤出造粒得到回收料母粒:一区180℃,二区190℃,三区220℃,四区210℃,五区200℃,机头温度200℃,螺杆转速100r/min;
(4)将AC发泡剂与LDPE按质量比1:6置于高速混合机中共混15min;
(5)将共混好的发泡剂混合物按如下工艺通过双螺杆挤出机挤出造粒得到回收料母粒:一区130℃,二区140℃,三区150℃,四区140℃,五区130℃,机头130℃,螺杆转速30r/min
(6)将发泡母粒与回收料母粒按质量比1:30混合均匀后如下工艺注塑成型得到微孔发泡制件:注塑温度200℃,注塑压力60MPa,注塑速度10g·s-1,冷却时间25s;
(7)根据相关标准测定所得PP保险杠回收料微孔发泡材料性能如表2所示。
实施例3:退役汽车聚烯烃塑料零部件化学发泡回收再利用方法
该方法包括如下步骤:
(1)将拆解得到的退役汽车PP保险杠进行清洗、破碎;
(2)将清洗破碎得到的保险杠回收料置于高速混合机内,与15重量份的2500目碳酸钙、5重量份的PP-g-MAH、抗氧剂B215共混30min;
(3)将共混好的回收料混合物按如下工艺通过双螺杆挤出机挤出造粒得到回收料母粒:一区190℃,二区200℃,三区230℃,四区220℃,五区210℃,机头温度210℃,螺杆转速200r/min;
(4)将AC发泡剂与LDPE按质量比1:10置于高速混合机中共混30min;
(5)将共混好的发泡剂混合物按如下工艺通过双螺杆挤出机挤出造粒得到回收料母粒:一区140℃,二区150℃,三区160℃,四区150℃,五区150℃,机头150℃,螺杆转速50r/min
(6)将发泡母粒与回收料母粒按质量比1:50混合均匀后如下工艺注塑成型得到微孔发泡制件:注塑温度220℃,注塑压力90MPa,注塑速度15g·s-1,冷却时间40s;
(7)根据相关标准测定所得PP保险杠回收料微孔发泡材料性能如表3所示。
实施例4:退役汽车聚烯烃塑料零部件化学发泡回收再利用方法
该方法包括如下步骤:
(1)将拆解得到的退役汽车PP仪表盘进行清洗、破碎;
(2)将清洗破碎得到的保险杠回收料置于高速混合机内,与0.1重量份的1250目滑石粉、0.1重量份的钛酸酯偶联剂201、抗氧剂1010共混5min;
(3)将共混好的保险杆回收料混合物按如下工艺通过双螺杆挤出机挤出造粒得到回收料母粒:一区160℃,二区170℃,三区200℃,四区190℃,五区180℃,机头温度180℃,螺杆转速30r/min;
(4)将AC发泡剂与低密度聚乙烯(LDPE)按质量比1:4置于高速混合机中共混5min;
(5)将共混好的发泡剂混合物按如下工艺通过双螺杆挤出机挤出造粒得到回收料母粒:一区110℃,二区120℃,三区130℃,四区130℃,五区120℃,机头120℃,螺杆转速10r/min
(6)将发泡母粒与回收料母粒按质量比1:20混合均匀后如下工艺注塑成型得到微孔发泡制件:注塑温度180℃,注塑压力30MPa,注塑速度5g·s-1,冷却时间10s;
(7)根据相关标准测定所得PP仪表盘回收料微孔发泡材料性能如表4所示。
实施例5:退役汽车聚烯烃塑料零部件化学发泡回收再利用方法
该方法包括如下步骤:
(1)将拆解得到的退役汽车PP仪表盘进行清洗、破碎;
(2)将清洗破碎得到的保险杠回收料置于高速混合机内,与8重量份的2500目滑石粉、2重量份的硅烷偶联剂KH570、抗氧剂168共混15min;
(3)将共混好的回收料混合物按如下工艺通过双螺杆挤出机挤出造粒得到回收料母粒:一区180℃,二区190℃,三区220℃,四区210℃,五区200℃,机头温度200℃,螺杆转速100r/min;
(4)将AC发泡剂与LDPE按质量比1:6置于高速混合机中共混15min;
(5)将共混好的发泡剂混合物按如下工艺通过双螺杆挤出机挤出造粒得到回收料母粒:一区130℃,二区140℃,三区150℃,四区140℃,五区130℃,机头130℃,螺杆转速30r/min;
(6)将发泡母粒与回收料母粒按质量比1:30混合均匀后如下工艺注塑成型得到微孔发泡制件:注塑温度200℃,注塑压力60MPa,注塑速度10g·s-1,冷却时间25s;
(7)根据相关标准测定所得聚丙烯仪表盘回收料微孔发泡材料性能如表5所示。
实施例6:退役汽车聚烯烃塑料零部件化学发泡回收再利用方法
该方法包括如下步骤:
(1)将拆解得到的退役汽车PP仪表盘进行清洗、破碎;
(2)将清洗破碎得到的保险杠回收料置于高速混合机内,与15重量份的2500目滑石粉、5重量份的PP-g-MAH、抗氧剂B215共混30min;
(3)将共混好的回收料混合物按如下工艺通过双螺杆挤出机挤出造粒得到回收料母粒:一区190℃,二区200℃,三区230℃,四区220℃,五区210℃,机头温度210℃,螺杆转速200r/min;
(4)将AC发泡剂与LDPE按质量比1:10置于高速混合机中共混30min;
(5)将共混好的发泡剂混合物按如下工艺通过双螺杆挤出机挤出造粒得到回收料母粒:一区140℃,二区150℃,三区160℃,四区150℃,五区150℃,机头150℃,螺杆转速50r/min;
(6)将发泡母粒与回收料母粒按质量比1:50混合均匀后如下工艺注塑成型得到微孔发泡制件:注塑温度220℃,注塑压力90MPa,注塑速度15g·s-1,冷却时间40s;
(7)根据相关标准测定所得PP仪表盘回收料微孔发泡材料性能如表6所示。
实施例7:退役汽车聚烯烃塑料零部件化学发泡回收再利用方法
该方法包括如下步骤:
(1)将拆解得到的退役汽车HDPE燃油箱进行清洗、破碎;
(2)将清洗破碎得到的燃油箱回收料置于高速混合机内,与0.1重量份的1250目蒙脱土、0.1重量份的钛酸酯偶联剂201、抗氧剂1010共混5min;
(3)将共混好的保险杆回收料混合物按如下工艺通过双螺杆挤出机挤出造粒得到回收料母粒:一区160℃,二区170℃,三区200℃,四区190℃,五区180℃,机头温度180℃,螺杆转速30r/min;
(4)将AC发泡剂与LDPE按质量比1:4置于高速混合机中共混5min;
(5)将共混好的发泡剂混合物按如下工艺通过双螺杆挤出机挤出造粒得到回收料母粒:一区110℃,二区120℃,三区130℃,四区130℃,五区120℃,机头120℃,螺杆转速10r/min
(6)将发泡母粒与回收料母粒按质量比1:20混合均匀后如下工艺注塑成型得到微孔发泡制件:注塑温度180℃,注塑压力30MPa,注塑速度5g·s-1,冷却时间10s;
(7)根据相关标准测定所得HDPE燃油箱回收料微孔发泡材料性能性能如表7所示。
实施例8:退役汽车聚烯烃塑料零部件化学发泡回收再利用方法
该方法包括如下步骤:
(1)将拆解得到的退役汽车HDPE燃油箱进行清洗、破碎;
(2)将清洗破碎得到的保险杠回收料置于高速混合机内,与8重量份的2500目蒙脱土、2重量份的硅烷偶联剂KH550、抗氧剂168共混15min;
(3)将共混好的回收料混合物按如下工艺通过双螺杆挤出机挤出造粒得到回收料母粒:一区180℃,二区190℃,三区220℃,四区210℃,五区200℃,机头温度200℃,螺杆转速100r/min;
(4)将AC发泡剂与LDPE按质量比1:6置于高速混合机中共混15min;
(5)将共混好的发泡剂混合物按如下工艺通过双螺杆挤出机挤出造粒得到回收料母粒:一区130℃,二区140℃,三区150℃,四区140℃,五区130℃,机头130℃,螺杆转速30r/min;
(6)将发泡母粒与回收料母粒按质量比1:30混合均匀后如下工艺注塑成型得到微孔发泡制件:注塑温度200℃,注塑压力60MPa,注塑速度10g·s-1,冷却时间25s;
(7)根据相关标准测定所得HDPE燃油箱回收料微孔发泡材料性能如表8所示。
实施例9:退役汽车聚烯烃塑料零部件化学发泡回收再利用方法
该方法包括如下步骤:
(1)将拆解得到的退役汽车HDPE燃油箱进行清洗、破碎;
(2)将清洗破碎得到的保险杠回收料置于高速混合机内,与15重量份的5000目滑石粉、5重量份的PE-g-MAH、抗氧剂B215共混30min;
(3)将共混好的回收料混合物按如下工艺通过双螺杆挤出机挤出造粒得到回收料母粒:一区190℃,二区200℃,三区230℃,四区220℃,五区210℃,机头温度210℃,螺杆转速200r/min;
(4)将AC发泡剂与LDPE按质量比1:10置于高速混合机中共混30min;
(5)将共混好的发泡剂混合物按如下工艺通过双螺杆挤出机挤出造粒得到回收料母粒:一区140℃,二区150℃,三区160℃,四区150℃,五区150℃,机头150℃,螺杆转速50r/min;
(6)将发泡母粒与回收料母粒按质量比1:50混合均匀后如下工艺注塑成型得到微孔发泡制件:注塑温度220℃,注塑压力90MPa,注塑速度15g·s-1,冷却时间40s;
(7)根据相关标准测定所得HDPE燃油箱回收料微孔发泡材料性能如表9所示。
表1聚丙烯保险杠回收料微孔发泡材料性能
性能 | 测试标准 | 单位 | 数值 |
密度 | GB/T 1033.1-2008 | g/cm3 | 0.78 |
热变形温度 | GB/T 1634.3-2004 | ℃ | 113 |
洛氏硬度 | GB/T 3398-2008 | R scale | 80 |
拉伸强度 | GB/T 1040.2-2006 | MPa | 17.5 |
断裂伸长率 | GB/T 1040.2-2006 | % | 34 |
弯曲模量 | GB/T 9341-2008 | MPa | 800 |
简支梁缺口冲击,23℃ | GB/T 1043.1-2008 | kJ/m3 | 22.3 |
收缩率 | GB/T 15585-1995 | % | 0.4-0.7 |
表2PP保险杠回收料微孔发泡材料性能
性能 | 测试标准 | 单位 | 数值 |
密度 | GB/T 1033.1-2008 | g/cm3 | 0.83 |
热变形温度 | GB/T 1634.3-2004 | ℃ | 126 |
洛氏硬度 | GB/T 3398-2008 | R scale | 95 |
拉伸强度 | GB/T 1040.2-2006 | MPa | 17.3 |
断裂伸长率 | GB/T 1040.2-2006 | % | 22 |
弯曲模量 | GB/T 9341-2008 | MPa | 1100 |
简支梁缺口冲击,23℃ | GB/T 1043.1-2008 | kJ/m3 | 27.6 |
收缩率 | GB/T 15585-1995 | % | 0.2-0.4 |
表3PP保险杠回收料微孔发泡材料性能
性能 | 测试标准 | 单位 | 数值 |
密度 | GB/T 1033.1-2008 | g/cm3 | 0.85 |
热变形温度 | GB/T 1634.3-2004 | ℃ | 135 |
洛氏硬度 | GB/T 3398-2008 | R scale | 100 |
拉伸强度 | GB/T 1040.2-2006 | MPa | 19.8 |
断裂伸长率 | GB/T 1040.2-2006 | % | 47 |
弯曲模量 | GB/T 9341-2008 | MPa | 1150 |
简支梁缺口冲击,23℃ | GB/T 1043.1-2008 | kJ/m3 | 32.1 |
收缩率 | GB/T 15585-1995 | % | 0.1-0.5 |
表4PP仪表盘回收料微孔发泡材料性能
性能 | 测试标准 | 单位 | 数值 |
密度 | GB/T 1033.1-2008 | g/cm3 | 0.82 |
热变形温度 | GB/T 1634.3-2004 | ℃ | 120 |
洛氏硬度 | GB/T 3398-2008 | R scale | 90 |
拉伸强度 | GB/T 1040.2-2006 | MPa | 19.6 |
断裂伸长率 | GB/T 1040.2-2006 | % | 12 |
弯曲模量 | GB/T 9341-2008 | MPa | 1200 |
简支梁缺口冲击,23℃ | GB/T 1043.1-2008 | kJ/m3 | 17.5 |
收缩率 | GB/T 15585-1995 | % | 0.3-0.5 |
表5PP仪表盘回收料微孔发泡材料性能
性能 | 测试标准 | 单位 | 数值 |
密度 | GB/T 1033.1-2008 | g/cm3 | 0.84 |
热变形温度 | GB/T 1634.3-2004 | ℃ | 127 |
洛氏硬度 | GB/T 3398-2008 | R scale | 95 |
拉伸强度 | GB/T 1040.2-2006 | MPa | 20.1 |
断裂伸长率 | GB/T 1040.2-2006 | % | 25 |
弯曲模量 | GB/T 9341-2008 | MPa | 1500 |
简支梁缺口冲击,23℃ | GB/T 1043.1-2008 | kJ/m3 | 25.8 |
收缩率 | GB/T 15585-1995 | % | 0.1-0.3 |
表6PP仪表盘回收料微孔发泡材料性能
性能 | 测试标准 | 单位 | 数值 |
密度 | GB/T 1033.1-2008 | g/cm3 | 0.83 |
热变形温度 | GB/T 1634.3-2004 | ℃ | 135 |
洛氏硬度 | GB/T 3398-2008 | R scale | 105 |
拉伸强度 | GB/T 1040.2-2006 | MPa | 19.6 |
断裂伸长率 | GB/T 1040.2-2006 | % | 37 |
弯曲模量 | GB/T 9341-2008 | MPa | 1300 |
简支梁缺口冲击,23℃ | GB/T 1043.1-2008 | kJ/m3 | 34.8 |
收缩率 | GB/T 15585-1995 | % | 0.1-0.3 |
表7HDPE燃油箱回收料微孔发泡材料性能
性能 | 测试标准 | 单位 | 数值 |
密度 | GB/T 1033.1-2008 | g/cm3 | 0.76 |
热变形温度 | GB/T 1634.3-2004 | ℃ | 95 |
洛氏硬度 | GB/T 3398-2008 | R scale | 80 |
拉伸强度 | GB/T 1040.2-2006 | MPa | 17.6 |
断裂伸长率 | GB/T 1040.2-2006 | % | 45 |
弯曲模量 | GB/T 9341-2008 | MPa | 1300 |
简支梁缺口冲击,23℃ | GB/T 1043.1-2008 | kJ/m3 | 40.7 |
收缩率 | GB/T 15585-1995 | % | 0.2-0.5 |
表8HDPE燃油箱回收料微孔发泡材料性能
性能 | 测试标准 | 单位 | 数值 |
密度 | GB/T 1033.1-2008 | g/cm3 | 0.73 |
热变形温度 | GB/T 1634.3-2004 | ℃ | 85 |
洛氏硬度 | GB/T 3398-2008 | R scale | 90 |
拉伸强度 | GB/T 1040.2-2006 | MPa | 17.1 |
断裂伸长率 | GB/T 1040.2-2006 | % | 48 |
弯曲模量 | GB/T 9341-2008 | MPa | 1450 |
简支梁缺口冲击,23℃ | GB/T 1043.1-2008 | kJ/m3 | 37.2 |
收缩率 | GB/T 15585-1995 | % | 0.3-0.5 |
表9HDPE燃油箱回收料微孔发泡材料性能
性能 | 测试标准 | 单位 | 数值 |
密度 | GB/T 1033.1-2008 | g/cm3 | 0.76 |
热变形温度 | GB/T 1634.3-2004 | ℃ | 105 |
洛氏硬度 | GB/T 3398-2008 | R scale | 95 |
拉伸强度 | GB/T 1040.2-2006 | MPa | 18.4 |
断裂伸长率 | GB/T 1040.2-2006 | % | 57 |
弯曲模量 | GB/T 9341-2008 | MPa | 1250 |
简支梁缺口冲击,23℃ | GB/T 1043.1-2008 | kJ/m3 | 44.6 |
收缩率 | GB/T 15585-1995 | % | 0.3-0.7 |
Claims (8)
1.退役汽车聚烯烃塑料零部件化学发泡回收再利用方法,其特征是采用包括以下步骤的方法:
1)将拆解得到的退役汽车聚烯烃零部件进行清洗、破碎,得到回收料;
2)将回收料置于高速混合机内,与添加的无机填料0.1-15重量份、相容剂0.1-5重量份、抗氧剂0.1-5重量份共混,共混时间5-30min,得到共混回收料;
3)将共混回收料通过双螺杆挤出机挤出造粒,得到回收料母粒;
4)将偶氮二甲酰胺发泡剂与低密度聚乙烯按质量比为1:4~1:10置于高速混合机中,共混5-30min,得到共混好的发泡剂混合物;
5)将共混好的发泡剂混合物通过双螺杆挤出机挤出造粒,得到发泡母粒;
6)将发泡母粒与回收料母粒按质量比为1:20~1:50混合后,经注塑机注塑成型,得到微孔发泡材料。
2.按照权利要求1所述的退役汽车聚烯烃塑料零部件化学发泡回收再利用方法,其特征在于步骤3)中双螺杆挤出机工艺参数为:一区温度110-140℃,二区温度120-150℃,三区温度130-160℃,四区温度130-150℃,五区温度120-150℃,机头温度120-150℃,螺杆转速10-50r/min。
3.按照权利要求1所述的退役汽车聚烯烃塑料零部件化学发泡回收再利用方法,其特征在于步骤5)中双螺杆挤出机工艺参数为:一区温度110-140℃,二区温度120-150℃,三区温度130-160℃,四区温度130-150℃,五区温度120-150℃,机头温度120-150℃,螺杆转速10-50r/min。
4.按照权利要求1所述的退役汽车聚烯烃塑料零部件化学发泡回收再利用方法,其特征在于步骤6)中注塑成型参数:注塑温度180-220℃,注塑压力30-90MPa,注塑速度5-15g·s-1,冷却时间10-40s。
5.按照权利要求1所述的退役汽车聚烯烃塑料零部件化学发泡回收再利用方法,其特征在于:所述相容剂为钛酸酯偶联剂131、201,硅烷偶联剂KH550、KH570,马来酸酐接枝聚丙,马来酸改接枝聚乙烯中的一种。
6.按照权利要求1所述的退役汽车聚烯烃塑料零部件化学发泡回收再利用方法,其特征在于:所述抗氧剂为汽车行业常用抗氧剂,其采用1010、168、B215中的一种。
7.按照权利要求1所述的退役汽车聚烯烃塑料零部件化学发泡回收再利用方法,其特征在于:所述无机填料为≥1250目的滑石粉、碳酸钙或蒙脱土中的一种。
8.按照权利要求1所述的退役汽车聚烯烃塑料零部件化学发泡回收再利用方法,其特征在于:所述退役汽车聚烯烃零部件包括聚丙烯保险杠、聚丙烯仪表盘、高密聚乙烯油箱等聚烯烃汽车塑料部件。
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