CN116041836A - 一种超高回弹eva化学发泡鞋底材料及其制备工艺 - Google Patents
一种超高回弹eva化学发泡鞋底材料及其制备工艺 Download PDFInfo
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- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 title description 22
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims abstract description 18
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- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 claims abstract description 9
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- C08J9/10—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent developing nitrogen, the blowing agent being a compound containing a nitrogen-to-nitrogen bond
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Abstract
本发明涉及鞋材技术领域,提供一种超高回弹EVA化学发泡鞋底材料及其制备工艺,包括如下重量份的各组份:乙烯醋酸乙烯共聚物45‑58重量份,烯烃嵌段共聚物10‑18重量份,热塑弹性体19‑30重量份,硬脂酸0.38‑0.45重量份,三元乙丙橡胶10‑12重量份,硬脂酸锌0.48‑0.58重量份,氧化锌0.9‑1.3重量份,发泡剂1.8‑2.25重量份,滑石粉3.5‑4.5重量份,交联剂0.75‑0.88重量份。本发明解决了现有市面上高回弹EVA鞋底在保持EVA鞋底基本性能其回弹性能无法突破并保持60%以上的问题。
Description
技术领域
本发明涉及鞋材技术领域,具体为一种超高回弹EVA化学发泡鞋底材料及其制备工艺。
背景技术
随着EVA材料在鞋底制造的应用技术的不断成熟,又轻又弹的EVA鞋底迅速占领了市场的绝大部分份额。目前一般EVA化学发泡材质鞋底回弹性能一般在45%,随着化工底厂在EVA材料应用上的不断研发与挖掘,各品牌方逐步推出一些高回弹性能的EVA鞋底,回弹性能基本只有在60%左右。如中国专利文献:CN202010738380.4本发明提供了一种运动鞋底用极轻质耐磨低压缩高回弹复合发泡材料,以质量分数计,包括以下组分:聚烯烃弹性体40~63%,马来酸酐接枝POE 3~6%,烯烃嵌段共聚物OBC 10~15%,三元乙丙胶5~12%,乙烯-醋酸乙烯共聚物5~10%,填充剂4~6%,硬脂酸0.2~0.3%,硬脂酸锌0.2~0.3%,氧化锌0.6~1.0%,交联剂0.4~0.7%,交联助剂0.6~1.0%和发泡剂5.0~7.7%。该复合发泡材料具有较低的密度,且具有优异的耐磨及回弹、耐压缩性能。但是该类鞋底的回弹亦是只有55%左右,在保持EVA鞋底基本性能其回弹性能无法突破并保持60%以上。
发明内容
针对现有高回弹EVA鞋底技术的不足,本发明提供了一种超高回弹EVA化学发泡鞋底材料及其制备工艺,本发明技术的产品在不影响其他物性的同时,产品回弹性能达70%以上,突破市面上同类产品回弹性能的上限且产品抗压缩性能优异,而且材料密度低于0.15g/cm³,在轻质上达到业界顶尖水准。
为实现上述目的,本发明提供如下技术方案:一种超高回弹EVA化学发泡鞋底材料,包括如下重量份的各组份:乙烯醋酸乙烯共聚物45-58重量份,烯烃嵌段共聚物10-18重量份,热塑弹性体19-30重量份,硬脂酸0.38-0.45重量份,三元乙丙橡胶10-12重量份,硬脂酸锌0.48-0.58重量份,氧化锌0.9-1.3重量份, 发泡剂1.8-2.25重量份,滑石粉3.5-4.5重量份,交联剂0.75-0.88重量份。
进一步的,所述发泡剂为偶氮二甲酰胺。
进一步的,所述交联剂为双叔丁基过氧化二异丙基苯。
上述超高回弹EVA化学发泡鞋底材料的制备工艺,包括以下步骤:
1)密炼机设定温度110℃,投入除发泡剂和交联剂以外的配方主料和药品,密炼打料至温度108℃开始扫粉及清洁四周,密炼打料打至113℃投入发泡剂和交联剂,降下锺锤-半空转30秒,放下锺锤清洁四周,打至120℃卸料;
2)混炼机轮台设定温度85℃,将步骤1)卸下的材料打厚一次,再打薄一次,最后打厚一次出料;
3)造粒机设定温度85℃、80℃、80℃、80℃、80℃,料筒及料槽清理干净进行切割造粒;
4) 步骤3)造粒好的料静置后,称取料粒倒入发泡机台硫化,使其在模具内形成一个粗胚半成品;
5)将步骤4)制成的粗坯半成品静置后经过轮机打磨把表皮和杂质磨掉;
6) 将步骤5)打磨好的半成品投入加热机台模具内加热后取出投入水冷机台模具内冷却后取出;
7) 将步骤6)取出的鞋底修剪掉边角,获得成品。
进一步的,在步骤2)中将步骤1)卸下的材料打厚一次5mm,接着打薄一次2mm,最后打厚一次5mm出料。
进一步的,在步骤4)中对步骤3)造粒好的料先静置24-48小时。
进一步的,在步骤5)中对步骤4)制成的粗坯半成品先静置24-48小时。
进一步的,在步骤6)中将步骤5)打磨好的半成品投入加热机台模具内加热500±30秒,加热温度220±10℃,加热后取出投入水冷机台模具内冷却500±30秒后取出,冷却水温20±5℃。
通过采用前述技术方案,本发明的有益效果是:通过EVA配方的优化改进,采用热塑性弹性体和烯烃嵌段共聚物与乙烯醋酸乙烯共聚物配合,使化学发泡产品达到70%及以上的回弹性能,结合其他成分保留一般EVA物性的同时更加轻盈,热塑性弹性体和烯烃嵌段共聚物自身结构的特点合适的配比搭配使得交联后形成的结构更稳定,具备更好的回弹和耐压缩性能;乙烯醋酸乙烯共聚物较高的VA含量让成品材料硬度较为柔软,发泡剂和交联剂的合理用量配比是保障产品实现低密度轻质的基础;硬脂酸锌和氧化锌起到一定的导热作用,加快化学反应进程;整体配方的合理搭配是实现产品整体性能的基础和保障,具备优秀的量产实用性,即在保有EVA鞋底基础性能的同时,本发明技术的产品回弹性能达70%以上,突破市面上同类产品回弹性能的上限且产品抗压缩性能优异,而且材料密度低于0.15g/cm³,在轻质上达到业界顶尖水准。
具体实施方式
基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
实施例中使用的原料、商品名和设备型号如下表:
测试参数指标:
硬度:根据GB/T3903.4-2008标准进行测试;
密度:根据GB/T 533-2008标准进行测试;
回弹:根据ASTM D2632-2001标准进行测试;
压缩:根据GB/T 10653-2001标准进行测试;
收缩:根据GB/T3903.13-2008标准进行测试;
抗拉:根据GB/T 3903.22-2008标准进行测试;
延伸率:根据GB/T 3903.22-2008标准进行测试;
撕裂强度:根据GB/T 3903.22-2008标准进行测试。
实施例一、实施例二、实施例三的各成分及其份量
材料名称 | 实施例一(PHR) | 实施例二(PHR) | 实施例三(PHR) |
乙烯醋酸乙烯共聚物 | 47.95 | 54.79 | 47.95 |
烯烃嵌段共聚物 | 13.70 | 13.70 | 16.44 |
热塑弹性体 | 27.40 | 20.55 | 24.66 |
三元乙丙橡胶 | 10.96 | 10.96 | 10.96 |
硬脂酸 | 0.41 | 0.41 | 0.41 |
硬脂酸锌 | 0.55 | 0.55 | 0.55 |
氧化锌 | 1.10 | 1.10 | 1.10 |
偶氮二甲酰胺 | 2.05 | 2.05 | 2.05 |
滑石粉 | 4.11 | 4.11 | 4.11 |
双叔丁基过氧化二异丙基苯 | 0.82 | 0.82 | 0.82 |
实施例一:
采用上述表格中实施例一各成分的配比,超高回弹EVA化学发泡鞋底材料的制备工艺,包括以下步骤:
1)密炼机设定温度110℃,投入乙烯醋酸乙烯共聚物 47.95PHR、烯烃嵌段共聚物13.7PHR、热塑弹性体27.4PHR、三元乙丙橡胶 10.96PHR、硬脂酸 0.41PHR、硬脂酸锌0.55PHR、 氧化锌1.10PHR、滑石粉4.11PHR,密炼打料至温度108℃开始扫粉及清洁四周,密炼打料打至113℃投入偶氮二甲酰胺2.05PHR及双叔丁基过氧化二异丙基苯0.82PHR,降下锺锤-半空转30秒,放下锺锤清洁四周,打至120℃卸料;
2)混炼机轮台设定温度85℃,将步骤一卸下的材料打厚一次(约5mm)打薄一次(约2mm),打厚一次(约5mm)出料;
3)造粒机设定温度85℃、80℃、80℃、80℃、80℃,料筒及料槽清理干净进行切割造粒;
4)造粒好的料静止24小时后,称取料粒倒入小发泡机台(185℃)硫化450秒,使其在模具内形成一个粗胚半成品;
5)将粗坯半成品静置24小时后经过轮机打磨把表皮和杂质磨掉;
6)将打磨好的半成品投入加热机台(220℃)模具内加热500秒后取出投入水冷机台水温(20℃)模具内冷却500秒后取出;
7)将取出的鞋底修剪掉边角,获得成品。
产品测试结果:
硬度:47C;
密度:0.145g/cm³;
回弹:71%;
压缩:24.5%;
收缩:0.8%;
抗拉:2.6Mpa;
延伸率:320%;
撕裂强度:2.0N/mm。
实施例二
采用上述表格中实施例二各成分的配比,超高回弹EVA化学发泡鞋底材料的制备工艺,包括以下步骤:
1)密炼机设定温度110℃,投入乙烯醋酸乙烯共聚物 54.79HR、烯烃嵌段共聚物13.7PHR、热塑弹性体20.55PHR、三元乙丙橡胶 10.96PHR、硬脂酸 0.41PHR、硬脂酸锌0.55PHR、 氧化锌1.10PHR、滑石粉4.11PHR,密炼打料至温度108℃开始扫粉及清洁四周,密炼打料打至113℃投入偶氮二甲酰胺2.05PHR及双叔丁基过氧化二异丙基苯0.82PHR,降下锺锤-半空转30秒,放下锺锤清洁四周,打至120℃卸料;
2)混炼机轮台设定温度85℃,将步骤一卸下的材料打厚一次(约5mm)打薄一次(约2mm),打厚一次(约5mm)出料;
3)造粒机设定温度85℃、80℃、80℃、80℃、80℃,料筒及料槽清理干净进行切割造粒;
4)造粒好的料静止24小时后,称取料粒倒入小发泡机台(185℃)硫化450秒,使其在模具内形成一个粗胚半成品;
5)将粗坯半成品静置24小时后经过轮机打磨把表皮和杂质磨掉;
6)将打磨好的半成品投入加热机台(220℃)模具内加热500秒后取出投入水冷机台水温(20℃)模具内冷却500秒后取出;
7)将取出的鞋底修剪掉边角,获得成品。
产品测试结果:
硬度:45C;
密度:0.14g/cm³;
回弹:70%;
压缩:24.8%;
收缩:0.85%;
抗拉:2.6Mpa;
延伸率:312%;
撕裂强度:1.8N/mm。
实施例三
采用上述表格中实施例三各成分的配比,超高回弹EVA化学发泡鞋底材料的制备工艺,包括以下步骤:
1)密炼机设定温度110℃,投入乙烯醋酸乙烯共聚物 47.95PHR、烯烃嵌段共聚物16.44PHR、热塑弹性体24.66PHR、三元乙丙橡胶 10.96PHR、硬脂酸0.41PHR、硬脂酸锌0.55PHR、氧化锌1.10PHR、滑石粉4.11PHR,密炼打料至温度108℃开始扫粉及清洁四周,密炼打料打至113℃投入偶氮二甲酰胺2.05PHR及双叔丁基过氧化二异丙基苯0.82PHR,降下锺锤-半空转30秒,放下锺锤清洁四周,打至120℃卸料;
2)混炼机轮台设定温度85℃,将步骤一卸下的材料打厚一次(约5mm)打薄一次(约2mm),打厚一次(约5mm)出料;
3)造粒机设定温度85℃、80℃、80℃、80℃、80℃,料筒及料槽清理干净进行切割造粒;
4)造粒好的料静止24小时后,称取料粒倒入小发泡机台(185℃)硫化450秒,使其在模具内形成一个粗胚半成品;
5)将粗坯半成品静置24小时后经过轮机打磨把表皮和杂质磨掉;
6)将打磨好的半成品投入加热机台(220℃)模具内加热500秒后取出投入水冷机台水温(20℃)模具内冷却500秒后取出;
7)将取出的鞋底修剪掉边角,获得成品。
产品测试结果:
硬度:48C;
密度:0.15g/cm³;
回弹:72%;
压缩:23%;
收缩:0.85%;
抗拉:2.65Mpa;
延伸率:331%;
撕裂强度:1.86N/mm。
根据三个实施例的最终测量数值:回弹≥70%,密度≤0.15g/cm³;且三个实施例中其他物理性质均达到业界一般可用水准,我司在回弹性能上的数值已经突破了市面上EVA化学发泡鞋底产品的上限,且密度低更轻质达到业界顶尖水平。
本发明中各原料的重量份数比,具体以下配比为宜:乙烯醋酸乙烯共聚物45-58重量份,烯烃嵌段共聚物10-18重量份,热塑弹性体19-30重量份,硬脂酸0.38-0.45重量份,三元乙丙橡胶10-12重量份,硬脂酸锌0.48-0.58重量份,氧化锌0.9-1.3重量份, 发泡剂1.8-2.25重量份,滑石粉3.5-4.5重量份,交联剂0.75-0.88重量份。
需要说明的是,在本文中,诸如第一和第二等之类的关系术语仅仅用来将一个实体或者操作与另一个实体或操作区分开来,而不一定要求或者暗示这些实体或操作之间存在任何这种实际的关系或者顺序。而且,术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含,从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素,而且还包括没有明确列出的其他要素,或者是还包括为这种过程、方法、物品或者设备所固有的要素。
尽管已经示出和描述了本发明的实施例,对于本领域的普通技术人员而言,可以理解在不脱离本发明的原理和精神的情况下可以对这些实施例进行多种变化、修改、替换和变型,本发明的范围由所附权利要求及其等同物限定。
Claims (8)
1.一种超高回弹EVA化学发泡鞋底材料,其特征在于:包括如下重量份的各组份:乙烯醋酸乙烯共聚物45-58重量份,烯烃嵌段共聚物10-18重量份,热塑弹性体19-30重量份,硬脂酸0.38-0.45重量份,三元乙丙橡胶10-12重量份,硬脂酸锌0.48-0.58重量份,氧化锌0.9-1.3重量份, 发泡剂1.8-2.25重量份,滑石粉3.5-4.5重量份,交联剂0.75-0.88重量份。
2.根据权利要求1所述的一种超高回弹EVA化学发泡鞋底材料,其特征在于:所述发泡剂为偶氮二甲酰胺。
3.根据权利要求1所述的一种超高回弹EVA化学发泡鞋底材料,其特征在于:所述交联剂为双叔丁基过氧化二异丙基苯。
4.上述权利要求1-3任一项权利要求所述超高回弹EVA化学发泡鞋底材料的制备工艺,其特征在于:包括以下步骤:
1)密炼机设定温度110℃,投入除发泡剂和交联剂以外的配方主料和药品,密炼打料至温度108℃开始扫粉及清洁四周,密炼打料打至113℃投入发泡剂和交联剂,降下锺锤-半空转30秒,放下锺锤清洁四周,打至120℃卸料;
2)混炼机轮台设定温度85℃,将步骤1)卸下的材料打厚一次,再打薄一次,最后打厚一次出料;
3)造粒机设定温度85℃、80℃、80℃、80℃、80℃,料筒及料槽清理干净进行切割造粒;
4) 步骤3)造粒好的料静置后,称取料粒倒入发泡机台硫化,使其在模具内形成一个粗胚半成品;
5)将步骤4)制成的粗坯半成品静置后经过轮机打磨把表皮和杂质磨掉;
6) 将步骤5)打磨好的半成品投入加热机台模具内加热后取出投入水冷机台模具内冷却后取出;
7) 将步骤6)取出的鞋底修剪掉边角,获得成品。
5.根据权利要求4所述的一种超高回弹EVA化学发泡鞋底材料的制备工艺,其特征在于:在步骤2)中将步骤1)卸下的材料打厚一次5mm,接着打薄一次2mm,最后打厚一次5mm出料。
6.根据权利要求4所述的一种超高回弹EVA化学发泡鞋底材料的制备工艺,其特征在于:在步骤4)中对步骤3)造粒好的料先静置24-48小时。
7.根据权利要求4所述的一种超高回弹EVA化学发泡鞋底材料的制备工艺,其特征在于:在步骤5)中对步骤4)制成的粗坯半成品先静置24-48小时。
8.根据权利要求4所述的一种超高回弹EVA化学发泡鞋底材料的制备工艺,其特征在于:在步骤6)中将步骤5)打磨好的半成品投入加热机台模具内加热500±30秒,加热温度220±10℃,加热后取出投入水冷机台模具内冷却500±30秒后取出,冷却水温20±5℃。
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