CN114835969A - 一种eva鞋底、低压缩变形的eva发泡片材及其制备方法 - Google Patents
一种eva鞋底、低压缩变形的eva发泡片材及其制备方法 Download PDFInfo
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Abstract
一种EVA鞋底、低压缩变形的EVA发泡片材及其制备方法,一种低压缩变形的EVA发泡片材,由以下原料组成:EVA、烯烃嵌段共聚物、溶聚丁苯橡胶、顺丁橡胶、发泡剂、交联剂、硅灰石粉、中空玻璃微球、石棉粉、碳酸钙、硬脂酸锌、环烷油,本身请制备的EVA发泡片材,采用EVA、丁苯橡胶、顺丁橡胶相互混用,在性能上能做到互补,并加入一定量的烯烃嵌段共聚物,使经EVA发泡片材发泡形成的EVA鞋底具有高弹性、永久压缩形变小的性能,有效提高制备的EVA鞋底的压缩变形性能。
Description
技术领域
本发明属于EVA鞋底制备领域,具体涉及一种EVA鞋底、低压缩变形的EVA发泡片材及其制备方法。
背景技术
随着生活水平的提高,运动健身已成为人们生活的常态,因此对于鞋类尤其是运动鞋鞋底材料的轻便、弹性和舒适性要求越来越高。轻质高弹是运动类鞋材的主要特质,特别是篮球、跑步等运动对于鞋底的重量和回弹性具有很高的要求。因此,易加工、轻量化、舒适和高弹是鞋用材料的发展方向。
EVA发泡材料由于密度低、弹性好、加工性能好等优点,广泛应用于鞋材领域,但也存在材料变形大、耐磨性能差等缺陷;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,提供一种低压缩变形的EVA发泡片材及其制备方,另一目的是提供一种采用上述EVA发泡片材制备的EVA鞋底及其制备方法。
本发明采用如下技术方案:
一种低压缩变形的EVA发泡片材,由以下重量份的原料组成:
进一步的,交联剂由二(叔丁基过氧化异丙基)苯、三烯丙基异氰脲酸酯按质量比1:0.1-0.2的比例组成。
进一步的,所述烯烃嵌段共聚物为为陶氏化学的INFUSETM OBC,优选OBC9107。
进一步的,所述发泡剂为偶氮二甲酰胺。
一种低压缩变形的EVA发泡片材的制备方法,包括以下步骤:
步骤一,先将除发泡剂、交联剂以外的原材料放入密炼机中进行密炼,当密炼达110-112℃时,排胶,室温放置24h以上;
步骤二,将密炼后的混合物在双辊开炼机上混炼,并加入准确称量的发泡剂、交联剂,混料均匀片状出片,得所述EVA发泡片材。
进一步的,步骤一中,密炼过程具体包括:先将EVA、烯烃嵌段共聚物、丁苯橡胶、顺丁橡胶混合放入密炼机中密炼,混合密炼8-12min;再继续加入除发泡剂、交联剂以外的原料混合密炼5-10min;然后调整密炼温度到88℃,保持5min后一次翻料;待密炼温度升至95℃,二次翻料;待密炼温度升至101℃,三次翻料;待密炼温度升至106℃,四次翻料;待密炼温度升至110-112℃,五次翻料,再密炼2min,排胶,室温放置24h以上。
进一步的,步骤二中,EVA发泡片材在开炼机中至少打薄两次,以2-3mm的厚度出片。
一种EVA鞋底,采用以上任一项限定的EVA发泡片材发泡而成。
一种EVA鞋底的制备方法,包括以下步骤:将EVA发泡片材裁成鞋底形状放入鞋底模具中发泡成型,发泡温度为150-160℃,得所述EVA鞋底。
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,本身请制备的EVA发泡片材,采用EVA、丁苯橡胶、顺丁橡胶相互混用,在性能上能做到互补,并加入一定量的烯烃嵌段共聚物,使经EVA发泡片材发泡形成的EVA鞋底具有高弹性、永久压缩形变小的性能,有效提高制备的EVA鞋底的压缩变形性能;其中,加入硅灰石粉、中空玻璃微球、石棉粉复配,作为骨架与主原料配合,有效降低EVA鞋底成型时的收缩率,保证成型的EVA鞋底的尺寸稳定性,弥补加入橡胶与烯烃前段共聚物而产生的收缩大的问题,有效提高制备的EVA鞋底的压缩形变性能;虽然本申请所用原料为常规的助剂,但是通过合理的原料组成及份量的调整,各原料之间也具有相互协同作用,以保证制备的EVA鞋底在具有高弹性的同时,还具有收缩率小、永久压缩形变小的性能;
第二,限定二(叔丁基过氧化异丙基)苯与三烯丙基异氰脲酸酯配合作为交联剂,与其他原料配合,使共混物具有较高的交联密度,减少橡胶分子的滑移和应力松弛,使制备的EVA鞋底具有高回弹性、永久压缩形变小的优点;
第三,加入环烷油作为相容剂,使各原料均匀结合在一起,以得到均匀稳定的共混物,以保证制得的EVA鞋底的优点;
第四,限定碳酸钙与硬脂酸锌配合,在环烷油的作用下,均匀下分散在共混物中,在发泡过程中使各区温度一致,缩短发泡时间,加快发泡效率。
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EVA鞋底,采用低压缩变形的EVA发泡片材发泡而成;其制备方法,包括以下步骤:将EVA发泡片材裁成鞋底形状放入鞋底模具中发泡成型,发泡温度为150-160℃,得EVA鞋底。
一种低压缩变形的EVA发泡片材,由以下重量份的原料组成:
其中,交联剂由二(叔丁基过氧化异丙基)苯、三烯丙基异氰脲酸酯按质量比1:0.1-0.2的比例组成。
其制备方法,包括以下步骤:
步骤一,先将EVA、烯烃嵌段共聚物、丁苯橡胶、顺丁橡胶混合放入密炼机中密炼,混合密炼8-12min;再继续加入除发泡剂、交联剂以外的原料混合密炼5-10min;然后调整密炼温度到88℃,保持5min后一次翻料;待密炼温度升至95℃,二次翻料;待密炼温度升至101℃,三次翻料;待密炼温度升至106℃,四次翻料;待密炼温度升至110-112℃,五次翻料,再密炼2min,排胶,室温放置24h以上;
步骤二,将密炼后的混合物在双辊开炼机上混炼,并加入准确称量的发泡剂、交联剂,混料均匀片状出片,得所述EVA发泡片材。
其中,步骤二中,EVA发泡片材在开炼机中至少打薄两次,以2-3mm的厚度出片。
实施例1
一种EVA鞋底,采用低压缩变形的EVA发泡片材发泡而成;其制备方法,包括以下步骤:将EVA发泡片材裁成鞋底形状放入鞋底模具中发泡成型,发泡温度为150℃,得EVA鞋底。
一种低压缩变形的EVA发泡片材,由以下重量份的原料组成:
其中,交联剂由二(叔丁基过氧化异丙基)苯、三烯丙基异氰脲酸酯按质量比1:0.1的比例组成。
其制备方法,包括以下步骤:
步骤一,先将EVA、烯烃嵌段共聚物、丁苯橡胶、顺丁橡胶混合放入密炼机中密炼,混合密炼8min;再继续加入除发泡剂、交联剂以外的原料混合密炼10min;然后调整密炼温度到88℃,保持5min后一次翻料;待密炼温度升至95℃,二次翻料;待密炼温度升至101℃,三次翻料;待密炼温度升至106℃,四次翻料;待密炼温度升至110℃,五次翻料,再密炼2min,排胶,室温放置24h以上;
步骤二,将密炼后的混合物在双辊开炼机上混炼,并加入准确称量的发泡剂、交联剂,混料均匀片状出片,得所述EVA发泡片材。
其中,步骤二中,EVA发泡片材在开炼机中至少打薄两次,以2mm的厚度出片。
实施例2
一种EVA鞋底,采用低压缩变形的EVA发泡片材发泡而成;其制备方法,包括以下步骤:将EVA发泡片材裁成鞋底形状放入鞋底模具中发泡成型,发泡温度为160℃,得EVA鞋底。
一种低压缩变形的EVA发泡片材,由以下重量份的原料组成:
其中,交联剂由二(叔丁基过氧化异丙基)苯、三烯丙基异氰脲酸酯按质量比1:0.2的比例组成。
其制备方法,包括以下步骤:
步骤一,先将EVA、烯烃嵌段共聚物、丁苯橡胶、顺丁橡胶混合放入密炼机中密炼,混合密炼12min;再继续加入除发泡剂、交联剂以外的原料混合密炼5min;然后调整密炼温度到88℃,保持5min后一次翻料;待密炼温度升至95℃,二次翻料;待密炼温度升至101℃,三次翻料;待密炼温度升至106℃,四次翻料;待密炼温度升至112℃,五次翻料,再密炼2min,排胶,室温放置24h以上;
步骤二,将密炼后的混合物在双辊开炼机上混炼,并加入准确称量的发泡剂、交联剂,混料均匀片状出片,得所述EVA发泡片材。
其中,步骤二中,EVA发泡片材在开炼机中至少打薄两次,以3mm的厚度出片。
实施例3
一种EVA鞋底,采用低压缩变形的EVA发泡片材发泡而成;其制备方法,包括以下步骤:将EVA发泡片材裁成鞋底形状放入鞋底模具中发泡成型,发泡温度为150-160℃,得EVA鞋底。
一种低压缩变形的EVA发泡片材,由以下重量份的原料组成:
其中,交联剂由二(叔丁基过氧化异丙基)苯、三烯丙基异氰脲酸酯按质量比1:0.15的比例组成。
其制备方法,包括以下步骤:
步骤一,先将EVA、烯烃嵌段共聚物、丁苯橡胶、顺丁橡胶混合放入密炼机中密炼,混合密炼10min;再继续加入除发泡剂、交联剂以外的原料混合密炼8min;然后调整密炼温度到88℃,保持5min后一次翻料;待密炼温度升至95℃,二次翻料;待密炼温度升至101℃,三次翻料;待密炼温度升至106℃,四次翻料;待密炼温度升至111℃,五次翻料,再密炼2min,排胶,室温放置24h以上;
步骤二,将密炼后的混合物在双辊开炼机上混炼,并加入准确称量的发泡剂、交联剂,混料均匀片状出片,得所述EVA发泡片材。
其中,步骤二中,EVA发泡片材在开炼机中至少打薄两次,以2mm的厚度出片。
对比例1
其原料组成和制备方法与实施例3基本一致,其区别在于:原料组成中溶聚丁苯橡胶替换为三元乙丙橡胶。
对比例2
其原料组成和制备方法与实施例3基本一致,其区别在于:原料组成中不添加溶聚丁苯橡胶,顺丁橡胶替换为三元乙丙橡胶。
对比例3
其原料组成和制备方法与实施例3基本一致,其区别在于:原料组成中不添加溶聚丁苯橡胶、顺丁橡胶。
对比例4
其原料组成和制备方法与实施例3基本一致,其区别在于:原料组成中不添加硅灰石粉。
对比例5
其原料组成和制备方法与实施例3基本一致,其区别在于:原料组成中硅灰石粉替换为滑石粉。
对比例6
其原料组成和制备方法与实施例3基本一致,其区别在于:原料组成中不添加中空玻璃微球、石棉粉。
对比例7
其原料组成和制备方法与实施例3基本一致,其区别在于:原料组成中交联剂为二(叔丁基过氧化异丙基)苯。
将实施例1-3与对比例1-7制备的EVA鞋底进行相应测试,获得如下数据:
其中,回弹率测试采用GT-7042-RE型冲击弹性试验机;永久压缩变形率测试参考HG/T2876(温度50℃、静态压缩时间6小时、压缩比例50%);动态压缩变形测试采用美国TA公司的动态机械分析仪RSAG2);
表1各实施例数据表
通过上述表格可知,采用本申请限定EVA发泡片材制备的EVA鞋底,具有高弹性、压缩形变小的优点。
本身请制备的EVA发泡片材,采用EVA、丁苯橡胶、顺丁橡胶相互混用,在性能上能做到互补,并加入一定量的烯烃嵌段共聚物,使经EVA发泡片材发泡形成的EVA鞋底具有高弹性、永久压缩形变小的性能,有效提高制备的EVA鞋底的压缩变形性能;其中,加入硅灰石粉、中空玻璃微球、石棉粉复配,作为骨架与主原料配合,有效降低EVA鞋底成型时的收缩率,保证成型的EVA鞋底的尺寸稳定性,弥补加入橡胶与烯烃前段共聚物而产生的收缩大的问题,有效提高制备的EVA鞋底的压缩形变性能;虽然本申请所用原料为常规的助剂,但是通过合理的原料组成及份量的调整,各原料之间也具有相互协同作用,以保证制备的EVA鞋底在具有高弹性的同时,还具有收缩率小、永久压缩形变小的优点。
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 (9)
2.根据权利要求1所述的一种低压缩变形的EVA发泡片材,其特征在于:交联剂由二(叔丁基过氧化异丙基)苯、三烯丙基异氰脲酸酯按质量比1:0.1-0.2的比例组成。
3.根据权利要求1所述的一种低压缩变形的EVA发泡片材,其特征在于:所述烯烃嵌段共聚物为为陶氏化学的INFUSETMOBC。
4.根据权利要求1所述的一种低压缩变形的EVA发泡片材,其特征在于:所述发泡剂为偶氮二甲酰胺。
5.一种低压缩变形的EVA发泡片材的制备方法,其特征在于:包括以下步骤:
步骤一,先将除发泡剂、交联剂以外的原材料放入密炼机中进行密炼,当密炼达110-112℃时,排胶,室温放置24h以上;
步骤二,将密炼后的混合物在双辊开炼机上混炼,并加入准确称量的发泡剂、交联剂,混料均匀片状出片,得所述EVA发泡片材。
6.根据权利要求5所述一种低压缩变形的EVA发泡片材的制备方法,其特征在于:步骤一中,密炼过程具体包括:先将EVA、烯烃嵌段共聚物、丁苯橡胶、顺丁橡胶混合放入密炼机中密炼,混合密炼8-12min;再继续加入除发泡剂、交联剂以外的原料混合密炼5-10min;然后调整密炼温度到88℃,保持5min后一次翻料;待密炼温度升至95℃,二次翻料;待密炼温度升至101℃,三次翻料;待密炼温度升至106℃,四次翻料;待密炼温度升至110-112℃,五次翻料,再密炼2min,排胶,室温放置24h以上。
7.根据权利要求5所述的一种低压缩变形的EVA发泡片材的制备方法,其特征在于:步骤二中,EVA发泡片材在开炼机中至少打薄两次,以2-3mm的厚度出片。
8.一种EVA鞋底,其特征在于:采用权利要求1限定的EVA发泡片材发泡而成。
9.根据权利要求8所述的一种EVA鞋底的制备方法,其特征在于:包括以下步骤:将EVA发泡片材裁成鞋底形状放入鞋底模具中发泡成型,发泡温度为150-160℃,得所述EVA鞋底。
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