CN115011061A - 一种防龟裂热塑性橡胶鞋底及其制备方法 - Google Patents
一种防龟裂热塑性橡胶鞋底及其制备方法 Download PDFInfo
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Abstract
一种防龟裂热塑性橡胶鞋底及其制备方法,防龟裂热塑性橡胶鞋底包括以下原料:热塑性弹性体、丁基橡胶、氯醚橡胶、聚苯乙烯、石蜡油、聚乙烯蜡、硬脂酸镁、抗氧剂、发泡剂、促进剂、硅藻土、云母粉、耐磨剂,本申请限定热塑性弹性体、丁基橡胶、氯醚橡胶、聚苯乙烯相互混用,与其他原料配合,在性能上能够做到互补,以使制备的热塑性橡胶鞋底强度高、韧性好、不龟裂、稳定性好,且不影响热塑性橡胶鞋底的贴合工艺。
Description
技术领域
本发明属于热塑性橡胶鞋底制备领域,具体涉及一种防龟裂热塑性橡胶鞋底及其制备方法。
背景技术
适用于鞋底的材料有橡胶、热塑性弹性体、塑料等,其中采用橡胶材料制备的鞋底具有耐磨性能优异、弹性回复好等优点,然而其加工工序多,产生的废料无法回收利用;热塑性弹性体具有加工方便、工艺简单、废料可回收利用等优点,因此以苯乙烯-丁二烯-苯乙烯嵌段共聚物(SBS)为主体材料的热塑性橡胶鞋底材料应用十分广泛,然而其制备的鞋底的鞋头位置发生龟裂,影响穿着,一般是添加三元乙丙橡胶以解决热塑性橡胶鞋底鞋头龟裂的问题,但是添加三元乙丙橡胶,会影响热塑性橡胶鞋底的贴合工艺,有待进一步改进。
发明内容
本发明的目的是克服现有技术的缺点,提供一种防龟裂热塑性橡胶鞋底,另一目的是提供一种上述热塑性橡胶鞋底的制备方法。
本发明采用如下技术方案:
一种防龟裂热塑性橡胶鞋底,包括以下重量份的原料:
进一步的,所述抗氧剂为抗氧剂BHT、抗氧剂1076、抗氧剂TPP中的一种或多种。
进一步的,所述抗氧剂由抗氧剂BHT、抗氧剂1076、抗氧剂TPP按质量比1:0.25-0.32:0.12-0.18。
进一步的,所述促进剂由硅树脂聚醚乳液、十二烷基硫酸钠、三羟甲基丙烷三甲基丙烯酸酯按质量比1:0.52-0.65:0.72-0.78的比例组成。
进一步的,所述发泡剂为二苯磺酰肼醚。
进一步的,所述耐磨剂为聚四氟乙烯微粉。
进一步的,所述热塑性弹性体为SBS、SEBS、SIS中的一种。
一种防龟裂热塑性橡胶鞋底的制备方法,包括以下步骤:
步骤一,将所需重量份的热塑性弹性体、丁基橡胶、氯醚橡胶、聚苯乙烯在高速混合器中预混12-18min,混合搅拌均匀,得预混物;
步骤二,往密炼机中加入步骤一制备的预混合和除发泡剂、促进剂外的其他原料,混合密炼,115-120℃排胶,室温放置24h以上;
步骤三,将密炼后的混合物在开炼机上混炼,并加入准确称量的发泡剂、促进剂,混料均匀,造粒,得热塑性橡胶料米;
步骤四,将热塑性橡胶料米加入到圆盘注塑机的料斗例,自动进料,经螺杆混炼熔融,挤入密封鞋底模具中注塑成型,冷却、开模,得所述热塑性橡胶鞋底。
进一步的,步骤四中,螺杆温度为148-160℃。
进一步的,螺杆第一温度160℃、螺杆第二温度156℃、螺杆第三温度152℃、螺杆第四温度148℃;注料时间3秒-6秒,模具保压时间0.5秒-1.5秒。
由上述对本发明的描述可知,与现有技术相比,本发明的有益效果是:
第一,本申请限定热塑性弹性体、丁基橡胶、氯醚橡胶、聚苯乙烯相互混用,与其他原料配合,在性能上能够做到互补,以使制备的热塑性橡胶鞋底强度高、韧性好、不龟裂、稳定性好,且不影响热塑性橡胶鞋底的贴合工艺;其中,引入对日光、臭氧具有良好抵抗性的丁基橡胶,具有良好粘接性、耐臭氧性及耐大气老化性的氯醚橡胶,在性能上做到互补,保证制得热塑性橡胶鞋底不龟裂的同时,还能不影响热塑性橡胶鞋底的贴合工艺;虽然所用的原料均为常规助剂,但是通过合理的原料组成及份量调整,严格把控工艺条件,以使制得的热塑性橡胶鞋底达到所需的性能要求;
第二,加入聚乙烯蜡与硬脂酸镁配合,可增强硅藻土、云母粉、发泡剂与促进剂的扩散,使上述原料均匀扩散在整体体系中,同时可提高成型的速率,便于脱模;其中,采用的硅藻土收缩率低,保证形成的泡孔不塌陷,配合限定的促进剂,稳定发泡速度,以获得均匀地闭孔结构,获得良好的力学性能;采用的云母粉具有优异的屏蔽紫外线和红外线等的性能,可有效延缓热塑性橡胶鞋底的老化,保证其不龟裂;
第三,采用硅树脂聚醚乳液、十二烷基硫酸钠、三羟甲基丙烷三甲基丙烯酸酯作为促进剂,配合多孔的硅藻土,注塑成型时,分解的气体能通过均匀分散的硅藻土均匀填充在整体体系中,以形成均匀地闭孔结构,保证获得较好的力学性能;
第四,通过限定抗氧剂的具体组成,与主原料配合,以降低整体体系的氧化降解,进而提高整体体系的抗老化性能,保证制得热塑性橡胶鞋底不开裂,且具有良好的韧性及弹性。
具体实施方式
以下通过具体实施方式对本发明作进一步的描述。
一种防龟裂热塑性橡胶鞋底,包括以下重量份的原料:
其中,抗氧剂为抗氧剂BHT、抗氧剂1076、抗氧剂TPP中的一种或多种;具体的,抗氧剂由抗氧剂BHT、抗氧剂1076、抗氧剂TPP按质量比1:0.25-0.32:0.12-0.18。
促进剂由硅树脂聚醚乳液、十二烷基硫酸钠、三羟甲基丙烷三甲基丙烯酸酯按质量比1:0.52-0.65:0.72-0.78的比例组成。
热塑性弹性体为SBS、SEBS、SIS中的一种。
其制备方法,包括以下步骤:
步骤一,将所需重量份的热塑性弹性体、丁基橡胶、氯醚橡胶、聚苯乙烯在高速混合器中预混12-18min,混合搅拌均匀,得预混物;
步骤二,密炼机中加入步骤一制备的预混物和除发泡剂、促进剂以外的其他原料,混合密炼10min;然后调整密炼温度到85℃,保持2min后一次翻料;待密炼温度升至92℃,二次翻料;待密炼温度升至100℃,三次翻料;待密炼温度升至108℃,四次翻料;待密炼温度升至115-120℃,五次翻料,再密炼2min,排胶,室温放置24h以上;
步骤三,将密炼后的混合物在开炼机上混炼,并加入准确称量的发泡剂、促进剂,混料均匀,造粒,得热塑性橡胶料米;
步骤四,将热塑性橡胶料米加入到圆盘注塑机的料斗例,自动进料,经螺杆混炼熔融,挤入密封鞋底模具中注塑成型,螺杆温度为148-160℃,冷却、开模,得热塑性橡胶鞋底。
其中,步骤四中,螺杆第一温度160℃、螺杆第二温度156℃、螺杆第三温度152℃、螺杆第四温度148℃;注料时间3秒-6秒,模具保压时间0.5秒-1.5秒。
实施例1
一种防龟裂热塑性橡胶鞋底,包括以下重量份的原料:
其中,抗氧剂为抗氧剂BHT、抗氧剂1076、抗氧剂TPP中的一种或多种;具体的,抗氧剂由抗氧剂BHT、抗氧剂1076、抗氧剂TPP按质量比1:0.25:0.18。
促进剂由硅树脂聚醚乳液、十二烷基硫酸钠、三羟甲基丙烷三甲基丙烯酸酯按质量比1:0.52:0.78的比例组成。
其制备方法,包括以下步骤:
步骤一,将所需重量份的热塑性弹性体、丁基橡胶、氯醚橡胶、聚苯乙烯在高速混合器中预混12min,混合搅拌均匀,得预混物;
步骤二,密炼机中加入步骤一制备的预混物和除发泡剂、促进剂以外的其他原料,混合密炼10min;然后调整密炼温度到85℃,保持2min后一次翻料;待密炼温度升至92℃,二次翻料;待密炼温度升至100℃,三次翻料;待密炼温度升至108℃,四次翻料;待密炼温度升至115℃,五次翻料,再密炼2min,排胶,室温放置24h以上;
步骤三,将密炼后的混合物在开炼机上混炼,并加入准确称量的发泡剂、促进剂,混料均匀,造粒,得热塑性橡胶料米;
步骤四,将热塑性橡胶料米加入到圆盘注塑机的料斗例,自动进料,经螺杆混炼熔融,挤入密封鞋底模具中注塑成型,螺杆温度为148-160℃,冷却、开模,得热塑性橡胶鞋底。
其中,步骤四中,螺杆第一温度160℃、螺杆第二温度156℃、螺杆第三温度152℃、螺杆第四温度148℃;注料时间3秒,模具保压时间0.5秒。
实施例2
一种防龟裂热塑性橡胶鞋底,包括以下重量份的原料:
其中,抗氧剂为抗氧剂BHT、抗氧剂1076、抗氧剂TPP中的一种或多种;具体的,抗氧剂由抗氧剂BHT、抗氧剂1076、抗氧剂TPP按质量比1:0.32:0.12。
促进剂由硅树脂聚醚乳液、十二烷基硫酸钠、三羟甲基丙烷三甲基丙烯酸酯按质量比1:0.65:0.72的比例组成。
其制备方法,包括以下步骤:
步骤一,将所需重量份的热塑性弹性体、丁基橡胶、氯醚橡胶、聚苯乙烯在高速混合器中预混18min,混合搅拌均匀,得预混物;
步骤二,密炼机中加入步骤一制备的预混物和除发泡剂、促进剂以外的其他原料,混合密炼10min;然后调整密炼温度到85℃,保持2min后一次翻料;待密炼温度升至92℃,二次翻料;待密炼温度升至100℃,三次翻料;待密炼温度升至108℃,四次翻料;待密炼温度升至120℃,五次翻料,再密炼2min,排胶,室温放置24h以上;
步骤三,将密炼后的混合物在开炼机上混炼,并加入准确称量的发泡剂、促进剂,混料均匀,造粒,得热塑性橡胶料米;
步骤四,将热塑性橡胶料米加入到圆盘注塑机的料斗例,自动进料,经螺杆混炼熔融,挤入密封鞋底模具中注塑成型,螺杆温度为148-160℃,冷却、开模,得热塑性橡胶鞋底。
其中,步骤四中,螺杆第一温度160℃、螺杆第二温度156℃、螺杆第三温度152℃、螺杆第四温度148℃;注料时间6秒,模具保压时间1.5秒。
实施例3
一种防龟裂热塑性橡胶鞋底,包括以下重量份的原料:
其中,抗氧剂为抗氧剂BHT、抗氧剂1076、抗氧剂TPP中的一种或多种;具体的,抗氧剂由抗氧剂BHT、抗氧剂1076、抗氧剂TPP按质量比1:0.28:0.15。
促进剂由硅树脂聚醚乳液、十二烷基硫酸钠、三羟甲基丙烷三甲基丙烯酸酯按质量比1:0.58:0.75的比例组成。
其制备方法,包括以下步骤:
步骤一,将所需重量份的热塑性弹性体、丁基橡胶、氯醚橡胶、聚苯乙烯在高速混合器中预混15min,混合搅拌均匀,得预混物;
步骤二,密炼机中加入步骤一制备的预混物和除发泡剂、促进剂以外的其他原料,混合密炼10min;然后调整密炼温度到85℃,保持2min后一次翻料;待密炼温度升至92℃,二次翻料;待密炼温度升至100℃,三次翻料;待密炼温度升至108℃,四次翻料;待密炼温度升至118℃,五次翻料,再密炼2min,排胶,室温放置24h以上;
步骤三,将密炼后的混合物在开炼机上混炼,并加入准确称量的发泡剂、促进剂,混料均匀,造粒,得热塑性橡胶料米;
步骤四,将热塑性橡胶料米加入到圆盘注塑机的料斗例,自动进料,经螺杆混炼熔融,挤入密封鞋底模具中注塑成型,螺杆温度为148-160℃,冷却、开模,得热塑性橡胶鞋底。
其中,步骤四中,螺杆第一温度160℃、螺杆第二温度156℃、螺杆第三温度152℃、螺杆第四温度148℃;注料时间4.5秒,模具保压时间1秒。
对比例1
其原料组成与制备方法和实施例3基本一致,其区别在于:原料组成中不添加丁基橡胶、氯醚橡胶。
对比例2
其原料组成与制备方法和实施例3基本一致,其区别在于:原料组成中不添加丁基橡胶。
对比例3
其原料组成与制备方法和实施例3基本一致,其区别在于:原料组成中不添加氯醚橡胶。
对比例4
其原料组成与制备方法和实施例3基本一致,其区别在于:抗氧剂为抗氧剂BHT。
对比例5
其原料组成与制备方法和实施例3基本一致,其区别在于:硅藻土、云母粉等量替换为滑石粉。
将实施例1-3与对比例1-5进行相应测试,获得如下数据:
其中,硬度采用GS-706G硬度计测试;DIN耐磨按照GB/T 9867-2008测试;耐黄变测试按照HG/T 3689太阳光、50℃、24小时;耐臭氧测试采用臭氧试验机,温度50℃、湿度65%、臭氧浓度200pphm、时间24小时,样品用拉伸夹具安装,将样品长度拉伸至120%,模拟鞋头受力拉伸现象;氙灯老化测试按GB/T 12831测试,光照102分钟,温度65℃,辐照度(340nm)为0.51W/(m2·nm),然后喷淋18分钟,循环测试168小时;耐水解测试按照GB/T 3903.7-2005测试,温度70℃、湿度95%、时间96小时;粘合强度按照GB/T 532-2008测试大底与标准EVA试片的粘合强度。
表1各实施例的测试数据表
通过上述表格可知,本申请制备的热塑性橡胶鞋底强度高、韧性好、不龟裂、稳定性好,且不影响热塑性橡胶鞋底的贴合工艺;其中,引入对日光、臭氧具有良好抵抗性的丁基橡胶,具有良好粘接性、耐臭氧性及耐大气老化性的氯醚橡胶,在性能上做到互补,保证制得热塑性橡胶鞋底不龟裂的同时,还能不影响热塑性橡胶鞋底的贴合工艺;虽然所用的原料均为常规助剂,但是通过合理的原料组成及份量调整,严格把控工艺条件,以使制得的热塑性橡胶鞋底达到所需的性能要求。
以上所述,仅为本发明的较佳实施例而已,故不能以此限定本发明实施的范围,即依本发明申请专利范围及说明书内容所作的等效变化与修饰,皆应仍属本发明专利涵盖的范围内。
Claims (10)
2.根据权利要求1所述的一种防龟裂热塑性橡胶鞋底,其特征在于:所述抗氧剂为抗氧剂BHT、抗氧剂1076、抗氧剂TPP中的一种或多种。
3.根据权利要求2所述的一种防龟裂热塑性橡胶鞋底,其特征在于:所述抗氧剂由抗氧剂BHT、抗氧剂1076、抗氧剂TPP按质量比1:0.25-0.32:0.12-0.18。
4.根据权利要求1所述的一种防龟裂热塑性橡胶鞋底,其特征在于:所述促进剂由硅树脂聚醚乳液、十二烷基硫酸钠、三羟甲基丙烷三甲基丙烯酸酯按质量比1:0.52-0.65:0.72-0.78的比例组成。
5.根据权利要求1所述的一种防龟裂热塑性橡胶鞋底,其特征在于:所述发泡剂为二苯磺酰肼醚。
6.根据权利要求1所述的一种防龟裂热塑性橡胶鞋底,其特征在于:所述耐磨剂为聚四氟乙烯微粉。
7.根据权利要求1所述的一种防龟裂热塑性橡胶鞋底,其特征在于:所述热塑性弹性体为SBS、SEBS、SIS中的一种。
8.一种防龟裂热塑性橡胶鞋底的制备方法,其特征在于:包括以下步骤:
步骤一,将所需重量份的热塑性弹性体、丁基橡胶、氯醚橡胶、聚苯乙烯在高速混合器中预混12-18min,混合搅拌均匀,得预混物;
步骤二,往密炼机中加入步骤一制备的预混合和除发泡剂、促进剂外的其他原料,混合密炼,115-120℃排胶,室温放置24h以上;
步骤三,将密炼后的混合物在开炼机上混炼,并加入准确称量的发泡剂、促进剂,混料均匀,造粒,得热塑性橡胶料米;
步骤四,将热塑性橡胶料米加入到圆盘注塑机的料斗例,自动进料,经螺杆混炼熔融,挤入密封鞋底模具中注塑成型,冷却、开模,得所述热塑性橡胶鞋底。
9.根据权利要求8所述的一种防龟裂热塑性橡胶鞋底的制备方法,其特征在于:步骤四中,螺杆温度为148-160℃。
10.根据权利要求9所述的一种防龟裂热塑性橡胶鞋底的制备方法,其特征在于:螺杆第一温度160℃、螺杆第二温度156℃、螺杆第三温度152℃、螺杆第四温度148℃;注料时间3秒-6秒,模具保压时间0.5秒-1.5秒。
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