CN116102814A - 一种超轻型减震eva鞋底及其制备工艺 - Google Patents
一种超轻型减震eva鞋底及其制备工艺 Download PDFInfo
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Abstract
一种超轻型减震EVA鞋底及其制备工艺,EVA鞋底由以下原料组成:乙烯‑醋酸乙烯酯共聚物、聚苯乙烯丁二烯共聚物、发泡剂、填料、硅树脂聚醚乳液、马来酸酐接枝聚乙烯蜡、过氧化二异丙苯、二乙二醇、硬脂酸锌、甲基丙烯酸羟丙酯、三亚乙基二胺、丙二醇,本发明通过限定EVA鞋底的具体原料组成及加入量,提高发泡率至2.2‑2.4倍,使制得的EVA鞋底密度小于0.1g/cm3,使制得的鞋底整体质量轻、减震性能好。
Description
技术领域
本发明属于发泡鞋底制备领域,具体涉及一种超轻型减震EVA鞋底及其制备工艺。
背景技术
市面上有各种款式新颖的鞋,可以满足运动者的一定需要,但具有较好功能性的鞋并不多,随着生活水平的提高,健身运动越来越被大众所需求,而鞋底是运动鞋中最为重要的组成部件,它具有提供减震性、稳定性及弯曲性,目前现有的运动鞋鞋底是通过控制发泡材料的配方、制作时的温度及成型时间等来实现不同的运动性能,其制作工序复杂,该鞋底用于运动鞋中,超轻及减震效果并不明显。要生产出超轻、减震实用的鞋子,不仅要用先进的材料,更要用先进的技术结构。
发明内容
本发明的目的是克服现有技术的缺点,提供一种超轻型减震EVA鞋底,另一目的使提供一种上述EAV鞋底的制备工艺。
本发明采用如下技术方案:
一种超轻型减震EVA鞋底,由以下重量份的原料组成:乙烯-醋酸乙烯酯共聚物70-80份、聚苯乙烯丁二烯共聚物35.7-42.8份、发泡剂3.3-3.9份、填料13.6-17.5份、硅树脂聚醚乳液0.8-1.2份、马来酸酐接枝聚乙烯蜡18.2-21.5份、过氧化二异丙苯1.6-2.1份、二乙二醇2.7-3.5份、硬脂酸锌2-2.6份、甲基丙烯酸羟丙酯7.9-9.5份、三亚乙基二胺0.3-0.5份、丙二醇0.75-0.9份。
进一步的,所述发泡剂由偶氮二甲酰胺、脂肪酸聚氧乙烯醚硫酸钠、聚乙二醇按质量份1:1.36-1.49:0.72-0.78的比例组成。
进一步的,所述填料由木粉、玻璃纤维、云母粉按质量份1:1-2:1.5-2.5的比例组成。
进一步的,所述EVA鞋底发泡比控制在1:2.2-2.4。
一种超轻型减震EVA鞋底的制备工艺,包括以下步骤:
步骤一,先将发泡剂、过氧化二异丙苯、甲基丙烯酸羟丙酯、马来酸酐接枝聚乙烯蜡之外的原料按重量份混合后进行密炼,调整温度为70-85℃,保持3min后翻料;
步骤二,待温度升温至90℃,加入部分马来酸酐接枝聚乙烯蜡,第二次翻料,待密炼温度升温至93℃,第三次翻料并加入甲基丙烯酸羟丙酯、马来酸酐接枝聚乙烯蜡;
步骤三,待密炼温度升温至98℃,第四次翻料加入过氧化二异丙苯、发泡剂,待密炼温度提升至104℃,第五次翻料;
步骤四,待温度升温至110℃,第六次翻料,再密炼1min,倒料、开炼、造粒,得到EVA料粒;
步骤五,将料粒倒入EVA注射机台中,一次射出得所述EVA鞋底。
进一步的,所述步骤二中,马来酸酐接枝聚乙烯蜡的加入量为总量的70%。
进一步的,所述步骤五中,注射机台的温度为170-185℃,模具温度为170-185℃,时间180-210s。
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,本发明通过限定EVA鞋底的具体原料组成及加入量,提高发泡率至2.2-2.4倍,使制得的EVA鞋底密度小于0.1g/cm3,使制得的鞋底整体质量轻、减震性能好;
第二,限定马来酸酐接枝聚乙烯蜡与甲基丙烯酸羟丙酯配合,作为改性剂,使共混物更加容易发泡,提高发泡率至2.2-2.4倍,缩短发泡时间,减少鞋底的制备时间;
第三,限定偶氮二甲酰胺与脂肪醇聚氧乙烯醚硫酸钠、聚乙二醇作为发泡剂与过氧化二异丙苯配合,使共混物形成均匀的密闭式气孔结构,气泡呈相互独立的状态,且气泡与气泡之间互不连通,降低鞋底的整体质量,且提升鞋底的减震性能;
第四,通过限定填料的具体组成,以减少鞋底的收缩率,提高发泡后鞋底尺寸的稳定性,其中,马来酸酐接枝聚乙烯蜡可与填料配合,改善和提高填料用于基体界面的相容性和粘结性,大大提高鞋底的减震性能。
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。
一种超轻型减震EVA鞋底,由以下重量份的原料组成:乙烯-醋酸乙烯酯共聚物70-80份、聚苯乙烯丁二烯共聚物35.7-42.8份、发泡剂3.3-3.9份、填料13.6-17.5份、硅树脂聚醚乳液0.8-1.2份、马来酸酐接枝聚乙烯蜡18.2-21.5份、过氧化二异丙苯1.6-2.1份、二乙二醇2.7-3.5份、硬脂酸锌2-2.6份、甲基丙烯酸羟丙酯7.9-9.5份、三亚乙基二胺0.3-0.5份、丙二醇0.75-0.9份。
其中,发泡剂由偶氮二甲酰胺、脂肪酸聚氧乙烯醚硫酸钠、聚乙二醇按质量份1:1.36-1.49:0.72-0.78的比例组成。
填料由木粉、玻璃纤维、云母粉按质量份1:1-2:1.5-2.5的比例组成。
EVA鞋底发泡比控制在1:2.2-2.4。
一种超轻型减震EVA鞋底的制备工艺,包括以下步骤:
步骤一,先将发泡剂、过氧化二异丙苯、甲基丙烯酸羟丙酯、马来酸酐接枝聚乙烯蜡之外的原料按重量份混合后进行密炼,调整温度为70-85℃,保持3min后翻料;
步骤二,待温度升温至90℃,按马来酸酐接枝聚乙烯蜡重量的70%加入马来酸酐接枝聚乙烯蜡,第二次翻料,待密炼温度升温至93℃,第三次翻料并加入甲基丙烯酸羟丙酯、马来酸酐接枝聚乙烯蜡;
步骤三,待密炼温度升温至98℃,第四次翻料加入过氧化二异丙苯、发泡剂,待密炼温度提升至104℃,第五次翻料;
步骤四,待温度升温至110℃,第六次翻料,再密炼1min,倒料、开炼、造粒,得到EVA料粒;
步骤五,将料粒倒入EVA注射机台中,一次射出得所述EVA鞋底,其中,注射机台的温度为170-185℃,模具温度为170-185℃,时间180-210s。
实施例
各实施例及对比例参照表1的参数进行制备(单位:g)
实施例1
一种超轻型减震EVA鞋底,其原料组成如表1所示,其中,发泡剂由偶氮二甲酰胺、脂肪酸聚氧乙烯醚硫酸钠、聚乙二醇按质量份1:1.36:0.78的比例组成;填料由木粉、玻璃纤维、云母粉按质量份1:1:1.5的比例组成。
其制备工艺,包括以下步骤:
步骤一,先将发泡剂、过氧化二异丙苯、甲基丙烯酸羟丙酯、马来酸酐接枝聚乙烯蜡之外的原料按重量份混合后进行密炼,调整温度为70℃,保持3min后翻料;
步骤二,待温度升温至90℃,按马来酸酐接枝聚乙烯蜡重量的70%加入马来酸酐接枝聚乙烯蜡,第二次翻料,待密炼温度升温至93℃,第三次翻料并加入甲基丙烯酸羟丙酯、马来酸酐接枝聚乙烯蜡;
步骤三,待密炼温度升温至98℃,第四次翻料加入过氧化二异丙苯、发泡剂,待密炼温度提升至104℃,第五次翻料;
步骤四,待温度升温至110℃,第六次翻料,再密炼1min,倒料、开炼、造粒,得到EVA料粒;
步骤五,将料粒倒入EVA注射机台中,一次射出得所述EVA鞋底,其中,注射机台的温度为185℃,模具温度为185℃,时间180s。
实施例2
一种超轻型减震EVA鞋底,其原料组成如表1所示,其中,发泡剂由偶氮二甲酰胺、脂肪酸聚氧乙烯醚硫酸钠、聚乙二醇按质量份1:1.49:0.72的比例组成;填料由木粉、玻璃纤维、云母粉按质量份1:2:2.5的比例组成。
其制备工艺,包括以下步骤:
步骤一,先将发泡剂、过氧化二异丙苯、甲基丙烯酸羟丙酯、马来酸酐接枝聚乙烯蜡之外的原料按重量份混合后进行密炼,调整温度为85℃,保持3min后翻料;
步骤二,待温度升温至90℃,按马来酸酐接枝聚乙烯蜡重量的70%加入马来酸酐接枝聚乙烯蜡,第二次翻料,待密炼温度升温至93℃,第三次翻料并加入甲基丙烯酸羟丙酯、马来酸酐接枝聚乙烯蜡;
步骤三,待密炼温度升温至98℃,第四次翻料加入过氧化二异丙苯、发泡剂,待密炼温度提升至104℃,第五次翻料;
步骤四,待温度升温至110℃,第六次翻料,再密炼1min,倒料、开炼、造粒,得到EVA料粒;
步骤五,将料粒倒入EVA注射机台中,一次射出得所述EVA鞋底,其中,注射机台的温度为170℃,模具温度为170℃,时间210s。
实施例3
一种超轻型减震EVA鞋底,其原料组成如表1所示,其中,发泡剂由偶氮二甲酰胺、脂肪酸聚氧乙烯醚硫酸钠、聚乙二醇按质量份1:1.42:0.75的比例组成;填料由木粉、玻璃纤维、云母粉按质量份1:1.5:2的比例组成。
其制备工艺,包括以下步骤:
步骤一,先将发泡剂、过氧化二异丙苯、甲基丙烯酸羟丙酯、马来酸酐接枝聚乙烯蜡之外的原料按重量份混合后进行密炼,调整温度为78℃,保持3min后翻料;
步骤二,待温度升温至90℃,按马来酸酐接枝聚乙烯蜡重量的70%加入马来酸酐接枝聚乙烯蜡,第二次翻料,待密炼温度升温至93℃,第三次翻料并加入甲基丙烯酸羟丙酯、马来酸酐接枝聚乙烯蜡;
步骤三,待密炼温度升温至98℃,第四次翻料加入过氧化二异丙苯、发泡剂,待密炼温度提升至104℃,第五次翻料;
步骤四,待温度升温至110℃,第六次翻料,再密炼1min,倒料、开炼、造粒,得到EVA料粒;
步骤五,将料粒倒入EVA注射机台中,一次射出得所述EVA鞋底,其中,注射机台的温度为178℃,模具温度为178℃,时间195s。
对比例1
其原料组成与实施例3的原料组成及制备方法基本一样,其区别在于:发泡剂为偶氮二甲酰胺。
对比例2
其原料组成与实施例3的原料组成及制备方法基本一样,其区别在于:发泡剂由偶氮二甲酰胺、脂肪酸聚氧乙烯醚硫酸钠按质量份1:1.42的比例组成。
对比例3
其原料组成与实施例3的原料组成及制备方法基本一样,其区别在于:发泡剂由偶氮二甲酰胺、聚乙二醇按质量份1:0.75的比例组成。
对比例4
其原料组成与实施例3的原料组成及制备方法基本一样,其区别在于:原料组成中未加入马来酸酐接枝聚乙烯蜡;步骤三中,第三次翻料只加入甲基丙烯酸羟丙基。
对比例5
其原料组成与实施例3的原料组成及制备方法基本一样,其区别在于:原料组成中为加入甲基丙烯酸羟丙基;步骤三中,第三次翻料只加入马来酸酐接枝聚乙烯蜡。
对比例6
其原料组成与实施例3的原料组成及制备方法基本一样,其区别在于:填料为滑石粉。
将上述各实施例及各对比例制得的发泡鞋底,进行相应的测试,获得如下数据,具体参见表2。
其中,冲击回弹率测试采用GT-7042-RE型冲击弹性试验机;
压缩变形测试参考HG/T2876(温度50℃、时间6小时、压缩比例50%);
尺寸收缩按照ISO 20873:2001测试。
表2各例子的性能参数表
通过表1及表2可知,本发明通过限定EVA鞋底的具体原料组成及加入量,提高发泡率至2.2-2.4倍,使制得的EVA鞋底密度小于0.1g/cm3,使制得的鞋底整体质量轻、减震性能好。
参照实施例3与对比例1-3可知,本发明制备的EVA鞋底具有较低的冲击回弹率,说明制得的EVA鞋底具有良好的减震性能,通过限定偶氮二甲酰胺与脂肪醇聚氧乙烯醚硫酸钠、聚乙二醇作为发泡剂与过氧化二异丙苯配合,使共混物形成均匀的密闭式气孔结构,气泡呈相互独立的状态,且气泡与气泡之间互不连通,降低鞋底的整体质量,提升鞋底的减震性能。
参照实施例3与对比例4-5可知,限定马来酸酐接枝聚乙烯蜡与甲基丙烯酸羟丙酯配合,作为改性剂,使共混物更加容易发泡,提高发泡率至2.2-2.4倍,缩短发泡时间,减少鞋底的制备时间。
参照实施例3与对比例6可知,限定填料的具体组成,以减少鞋底的收缩率,提高发泡后鞋底尺寸的稳定性,其中,马来酸酐接枝聚乙烯蜡可与填料配合,改善和提高填料用于基体界面的相容性和粘结性,大大提高鞋底的减震性能。
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 (7)
1.一种超轻型减震EVA鞋底,其特征在于:由以下重量份的原料组成:乙烯-醋酸乙烯酯共聚物70-80份、聚苯乙烯丁二烯共聚物35.7-42.8份、发泡剂3.3-3.9份、填料13.6-17.5份、硅树脂聚醚乳液0.8-1.2份、马来酸酐接枝聚乙烯蜡18.2-21.5份、过氧化二异丙苯1.6-2.1份、二乙二醇2.7-3.5份、硬脂酸锌2-2.6份、甲基丙烯酸羟丙酯7.9-9.5份、三亚乙基二胺0.3-0.5份、丙二醇0.75-0.9份。
2.根据权利要求1所述的一种超轻型减震EVA鞋底,其特征在于:所述发泡剂由偶氮二甲酰胺、脂肪酸聚氧乙烯醚硫酸钠、聚乙二醇按质量份1:1.36-1.49:0.72-0.78的比例组成。
3.根据权利要求1所述的一种超轻型减震EVA鞋底,其特征在于:所述填料由木粉、玻璃纤维、云母粉按质量份1:1-2:1.5-2.5的比例组成。
4.根据权利要求1所述的一种超轻型减震EVA鞋底,其特征在于:所述EVA鞋底发泡比控制在1:2.2-2.4。
5.一种超轻型减震EVA鞋底的制备工艺,其特征在于:包括以下步骤:
步骤一,先将发泡剂、过氧化二异丙苯、甲基丙烯酸羟丙酯、马来酸酐接枝聚乙烯蜡之外的原料按重量份混合后进行密炼,调整温度为70-85℃,保持3min后翻料;
步骤二,待温度升温至90℃,加入部分马来酸酐接枝聚乙烯蜡,第二次翻料,待密炼温度升温至93℃,第三次翻料并加入甲基丙烯酸羟丙酯、马来酸酐接枝聚乙烯蜡;
步骤三,待密炼温度升温至98℃,第四次翻料加入过氧化二异丙苯、发泡剂,待密炼温度提升至104℃,第五次翻料;
步骤四,待温度升温至110℃,第六次翻料,再密炼1min,倒料、开炼、造粒,得到EVA料粒;
步骤五,将料粒倒入EVA注射机台中,一次射出得所述EVA鞋底。
6.根据权利要求5所述的一种超轻型减震EVA鞋底的制备工艺,其特征在于:所述步骤二中,马来酸酐接枝聚乙烯蜡的加入量为总量的70%。
7.根据权利要求5所述的一种超轻型减震EVA鞋底的制备工艺,其特征在于:所述步骤五中,注射机台的温度为170-185℃,模具温度为170-185℃,时间180-210s。
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