CN116178874A - 一种生物基高弹eva复合材料及其发泡鞋材的制备方法 - Google Patents
一种生物基高弹eva复合材料及其发泡鞋材的制备方法 Download PDFInfo
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Abstract
本发明涉及EVA材料技术领域,具体涉及一种生物基高弹EVA复合材料及其发泡鞋材的制备方法,本申请提供的生物基高弹EVA复合材料,其通过生物基EVA、高弹POE、SEBS、三元乙丙橡胶、抗收缩稳定剂、润滑剂、氧化锌、发泡剂、无味过氧交联剂和颜色稳定剂的合理复配,该材料采用生物基EVA,实现了环保,且该材料通过合理的过氧化物交联剂的添加,利用过氧化物交联剂的高键能特性,达到高弹性和低压缩歪的效果;本申请提供的发泡材料的制备方法,在制备过程中,通过两次特定温度的模压定型和高温硫化,确保材料达到高弹性和低压缩歪的效果,其工艺简单,制备容易,满足大批量生产制造需求。
Description
技术领域
本发明涉及EVA材料技术领域,特别是涉及一种生物基高弹EVA复合材料及其发泡鞋材的制备方法。
背景技术
随着社会的发展,人们对鞋子穿着舒适性等需求的逐渐提高,轻便弹性好的鞋材受到人们的青睐,现有技术中,通常采用EVA发泡材料,以实现鞋材的回弹、轻便等功能,以提升穿着舒适感。但是目前的EVA发泡材料,回弹性在50%-60%左右,并不能满足更高需求的弹性需求,同时,现有的EVA发泡材料存在环保性差的弊端。
发明内容
为解决上述问题,本发明提供一种生物基高弹EVA复合材料及其发泡鞋材的制备方法,该生物基高弹EVA复合材料具有环保、高弹性能,可以更好地满足应用需求;该发泡鞋材的制备方法,工艺简单,制备容易,可以更好地满足大批量生产制造需求。
本发明采用的技术方案是:
一种生物基高弹EVA复合材料,包括主料和辅料;
所述主料包含如下质量百分含量的组分:
所述辅料包含如下占主料百分比例含量的组分:
进一步地,所述主料包含如下质量百分含量的组分:
包括如下质量百分含量的组分:
所述辅料包含如下占主料百分比例含量的组分:
进一步地,所述生物基EVA为采用甘蔗原料,经甘蔗原料中的蔗糖聚合反应合成。
进一步地,所述三元乙丙橡胶为三井EPDM3092。
进一步地,所述润滑剂为质量比是1:1的硬脂酸锌和硬脂酸的混合物。
进一步地,所述发泡剂为偶氮二甲酰胺类发泡剂。
进一步地,所述颜色稳定剂为钛白粉。
进一步地,所述抗收缩稳定剂为滑石粉。
基于同一发明构思,本申请还提供一种使用上述生物基高弹EVA复合材料制备发泡鞋材的方法,包含如下步骤:
按照质量配比配料;
将配好的原料送入密炼机,进行高温加压密炼,出片、挤出造粒,得到生物基高弹EVA复合材料;
将造粒料放置超过24小时后,进行首次发泡,形成粗胚,打磨后,二次定型,冷却后即得鞋材。
进一步地,密炼机的出料温度为115-125℃。
进一步地,
其中,首次发泡的温度为170-180℃,时间为500-700S;
其中,二次定型的温度为155-165℃,时间为480-520S;
其中,二次定型后,采用冷水冷却480-500S。
本发明的有益效果如下:
1、本申请提供的生物基高弹EVA复合材料,其通过生物基EVA、高弹POE、SEBS、三元乙丙橡胶、抗收缩稳定剂、润滑剂、氧化锌、发泡剂、无味过氧交联剂和颜色稳定剂的合理复配,由于该材料采用生物基EVA,实现了环保性,且该材料在一定温度下,发泡剂受热分解为氮气等气体,利用塑胶成膜性,密闭膜锁住气体,形成内压,在内压大于外压情况下,物体获得高弹性,并通过合理的过氧化物交联剂的添加,利用过氧化物交联剂的高键能特性,达到高弹性和低压缩歪的效果;
2、本申请提供的发泡材料的制备方法,在制备过程中,通过两次特定温度的模压定型和高温硫化,确保材料达到高弹性和低压缩歪的效果,其工艺简单,制备容易,满足大批量生产制造需求。
附图说明
图1为本申请一些实施例中的制备流程图;
图2为本申请的生物基EVA组分的制备流程框图;
具体实施方式
下面将结合附图对本发明作进一步的说明。
本申请提供的生物基高弹EVA复合材料,其包含组分生物基EVA、高弹POE、SEBS、三元乙丙橡胶、抗收缩稳定剂、润滑剂、氧化锌、发泡剂、无味过氧交联剂和颜色稳定剂。
其中的生物基EVA为环保EVA,使用甘蔗为原料,蔗糖经过聚合反应重新合成为乙烯,甘蔗渣可以燃烧发电,甘蔗灰可以返田作为肥料,达到完全环保的目的。
其中的高弹POE为辛烯类POE,以提升材料的高弹高硬度。
其中的SEBS为氢化SEBS,采用日本旭化成产品,以实现超弹性。
其中的三元乙丙橡胶使用三井EPDM3092,实现高弹、橡胶质感。
其中的抗收缩稳定剂,具体可以选用滑石粉,以起到对发泡孔壁结构支撑的作用,降低收缩率。
其中的润滑剂由硬脂酸锌和硬脂酸组成,硬脂酸锌用于润滑和中和粘性;硬脂酸用于润滑,同时和氧化锌起反应,生成硬脂酸锌络合物,提升材料的稳定性;
其中的氧化锌作用为发泡成核剂,使得发泡更加均匀;
其中的发泡剂为偶氮二甲酰胺类发泡剂,实现发泡效果;
其中的无味过氧交联剂的加入,避免了DCP的臭味,且环保;
其中的二氧化钛作为颜色稳定剂,并协助发泡收缩的控制。
该复合材料的发泡及高弹机理如下;
一定温度下,偶氮类发泡剂受热分解为氮气等气体,利用塑胶成膜性特征,密闭膜锁住气体,形成内压;
在内压大于外压情况下,物体获得高弹性;
利用过氧化物交联剂的高键能特性,及二次模压定型的高温二次硫化;达到高弹性和低压缩歪的效果。
下面为本申请的具体实施例
实施例1
本实施例所述生物基高弹EVA复合材料,包括主料和辅料;
所述主料包含如下质量百分含量的组分:
所述辅料包含如下占主料百分比例含量的组分:
参见图1所示,将本实施例中的复合材料,按照如下制备步骤制备发泡鞋材:
配料;
密炼机打料,卸料温度120度,造粒;
停放24H后发泡,发泡温度175℃,发泡时间550秒,打磨拉毛粗胚表面,二次定型,二次定型温度为160℃,时间为500秒,之后用冷却水冷却500秒,修边,制成鞋材,进行性能测试。
具体地,本实施例中,制成的鞋材为鞋底。
实施例2
本实施例与实施例1的复合材料的区别仅在于其中的AC发泡剂的含量为3.5%。
本实施例中制备鞋材的步骤同实施例1。
实施例3
本实施例与实施例1的复合材料的区别仅在于其中的AC发泡剂的含量为4%。
本实施例中制备鞋材的步骤同实施例1。
将实施例1-3中制得的鞋底进行性能测试,测试标准和测试结果如下表所示:
物性/实施例 | ASTM | 实施例1 | 实施例2 | 实施例3 |
拉力N/mm2 | UATM R08 | 3.3 | 3.4 | 3.2 |
撕裂N/mm | UATM R09 | 2.2 | 1.7 | 3.0 |
延伸率% | UATM R08 | 270 | 253 | 389 |
收缩率% | UATM R06 | 1.50 | 1.50 | 2.60 |
压缩歪% | UATM R45 | 53 | 55 | 52 |
老化 | UATM R26 | 4级 | 4级 | 4级 |
倍率 | / | 1.6 | 1.7 | 1.8 |
硬度C | UATM R03 | 50 | 43 | 37 |
反弹% | UATM R44 | 67% | 66% | 65% |
参见上表可知,本实施例中提供的复合材料,制得的鞋材,其回弹性均不低于65%,环保且高弹,可以更好满足应用需求。
具体地,本实施例中,参见图2所示,为组分生物基EVA的制备流程图,其采用甘蔗作为原料,甘蔗压榨之后的甘蔗渣用于发电,产生的电能用于后端工艺的能源;压榨之后的滤饼和发电产生的灰烬,则可以用作肥料,种植甘蔗,或返田用作废料;压榨之后的甘蔗汁用于生产蔗糖,而生长蔗糖过程中的沉淀物和渣用来生产乙醇,之后生产形成工艺乙醇、工艺乙烷和乙醇燃料,之后将工业乙烷加工成绿色乙烯,再加入醋酸乙烯,以生成环保乙烯和环保EVA材料,本申请通过选用上述环保生物基EVA,其使用甘蔗为原料,蔗糖经过聚合反应重新合成为乙烯,甘蔗渣可以燃烧发电,甘蔗灰可以返田作为肥料,达到完全环保的目的。本申请中,不仅生物基本身是环保的,且通过该生物基的加入,使得复合材料本申请具有环保性,同时通过其余组分的复配,使得本申请提供的复合材料,在具有环保性的同时,还具有高弹性,可更好地进行环保和高弹应用。
本实施例提供的制备方法,在制备过程中,通过两次特定温度的模压定型和高温硫化,确保材料达到高弹性和低压缩歪的效果,且制得的鞋材弹性品质稳定,其工艺简单,制备容易,满足大批量生产制造需求。
以上所述实施例仅表达了本发明的几种实施方式,其描述较为具体和详细,但并不能因此而理解为对本发明专利范围的限制。应当指出的是,对于本领域的普通技术人员来说,在不脱离本发明构思的前提下,还可以做出若干变形和改进,这些都属于本发明的保护范围。因此,本发明专利的保护范围应以所附权利要求为准。
Claims (10)
3.根据权利要求1所述的生物基高弹EVA复合材料,其特征在于,所述生物基EVA为采用甘蔗原料,经甘蔗原料中的蔗糖聚合反应合成。
4.根据权利要求1所述的生物基高弹EVA复合材料,其特征在于,所述三元乙丙橡胶为三井EPDM3092。
5.根据权利要求1所述的生物基高弹EVA复合材料,其特征在于,所述润滑剂为质量比是1:1的硬脂酸锌和硬脂酸的混合物。
6.根据权利要求1所述的生物基高弹EVA复合材料,其特征在于,所述发泡剂为偶氮二甲酰胺类发泡剂。
7.根据权利要求1所述的生物基高弹EVA复合材料,其特征在于,所述颜色稳定剂为二氧化钛类。
8.使用权利要求1-7任一项所述的生物基高弹EVA复合材料的制备发泡鞋材的方法,其特征在于,包含如下步骤:
按照质量配比配料;
将配好的原料送入密炼机,进行高温加压密炼,出片、挤出造粒,得到生物基高弹EVA复合材料;
将造粒料放置超过24小时后,进行首次发泡,形成粗胚,打磨后,二次定型,冷却后即得鞋材。
9.根据权利要求8所述发泡鞋材的制备方法,其特征在于,密炼机的出料温度为115-125℃。
10.根据权利要求8所述发泡鞋材的制备方法,其特征在于,
其中,首次发泡的温度为170-180℃,时间为500-700S;
其中,二次定型的温度为155-165℃,时间为480-520S;
其中,二次定型后,采用冷水冷却480-500S。
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