CN104804297A - 一种轻量高弹eva鞋底及其制备方法 - Google Patents

一种轻量高弹eva鞋底及其制备方法 Download PDF

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CN104804297A
CN104804297A CN201510200284.3A CN201510200284A CN104804297A CN 104804297 A CN104804297 A CN 104804297A CN 201510200284 A CN201510200284 A CN 201510200284A CN 104804297 A CN104804297 A CN 104804297A
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eva
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卢鑫
丁思博
罗显发
廖毅彬
郭彩莲
周小兰
林荷香
林江
金校红
郑荣大
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Maotai Fujian New Material Technology Co ltd
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Maotai Fujian Shoes Material Co Ltd
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Abstract

本发明涉及有机高分子化合物技术领域，提供一种轻量高弹EVA鞋底及其制备方法，由原料EVA、聚烯烃嵌段共聚物、三元乙丙橡胶、氯化聚乙烯、发泡剂、交联剂、硬脂酸锌、硬脂酸、耐磨剂、滑石粉经过密炼、开炼、造粒制得轻量高弹EVA料米，再经一次射出成型得到轻量高弹EVA鞋底，所述轻量高弹EVA鞋底具有高回弹、高尺寸稳定性、低压缩变形率、表面不易起皱等特点，而且具有质轻、综合性能好、产品合格率高等特点，可以使EVA鞋底更轻量化，特别适合生产高档EVA运动休闲鞋。

Description

一种轻量高弹EVA鞋底及其制备方法
技术领域
本发明属于有机高分子化合物技术领域，特别涉及一种轻量高弹EVA鞋底及其制备方法。
背景技术
鞋是每个人都离不开的生活必需品,出于舒适性的考虑，生活中人们更愿意选择轻一些的鞋靴。对于热爱运动的人来说，轻量化的鞋，保持功能性不下降，将消耗穿着者更少的能量,并提高其运动效能和穿着舒适性。轻量化的过程也许只是减轻了几克十几克，也许看起来微不足道，对于运动员来说，尤其是足球运动员，重量可以对等于速度，这将给运动员带来巨大的改变。
聚烯烃嵌段共聚物的分子链中硬段和软段交替排列，且交替排列的频率是固定的，分子长度也是可变可控，使得嵌段共聚物的相对分子质量分布窄。聚烯烃嵌段共聚物与EVA相比，增加弹性，更高的耐热，改进的压缩形变，重量轻，感官刺激小，但也存在与EVA同样的缺陷：表面结晶率高，表皮容易起皱等问题。泉州三盛橡塑发泡鞋材有限公司的专利CN 103992609 A和CN 103992610 A公开了烯烃嵌段共聚物发泡材料及其制备方法，得到了具有高柔韧性、耐热性佳、弹性回复和压缩形变性能优异等特点的泡沫材料，但是该泡沫材料不适合应用于鞋材，因为烯烃嵌段共聚物极性小，很难与鞋面、鞋配件粘合，给鞋成型过程带来很大困难；原材料价格昂贵，生产成本高；抓地力较差；产品表面容易起皱，影响美观。
发明内容
本发明的目的就是针对现有技术存在的不足而提供一种轻量高弹EVA鞋底及其制备方法，所述轻量高弹EVA鞋底具有高回弹、高尺寸稳定性、低压缩变形、表面不易起皱等特点，而且具有质轻、综合性能好、产品合格率高等特点，可以使EVA鞋底更轻量化，特别适合生产高档EVA运动休闲鞋。
为实现上述目的，本发明采取的解决方案为：一种轻量高弹EVA鞋底，由以下原料组成制得：原料EVA、聚烯烃嵌段共聚物、三元乙丙橡胶、氯化聚乙烯、发泡剂、交联剂、硬脂酸锌、硬脂酸、耐磨剂、滑石粉。
进一步的是，各原料的重量份如下：
EVA                               40 份
聚烯烃嵌段共聚物                  25 - 35 份
三元乙丙橡胶                      8 - 12 份
氯化聚乙烯                        5 - 8 份
发泡剂                            2.2 - 3 份
交联剂                            1.4 - 1.8 份
硬脂酸锌                          2–2.5 份
硬脂酸                            1–1.5 份
耐磨剂                            2 - 3 份
滑石粉                            4 - 6 份。
进一步优选的，各组分按下列重量份配置:
EVA                              40 份
聚烯烃嵌段共聚物                  33 份
三元乙丙橡胶                      10 份
氯化聚乙烯                        6 份
发泡剂                            2.5 份
交联剂                            1.7 份
硬脂酸锌                          2.2 份
硬脂酸                            1.2 份
耐磨剂                            2 份
滑石粉                            5份。
进一步的是：所述EVA是VA含量大于25%的EVA。
进一步的是：所述三元乙丙橡胶为丙烯基含量在29-39%之间。
进一步的是：所述三元乙丙橡胶为亚乙基降冰片含量在0.1-1.0%范围内。
进一步的是：所述聚烯烃嵌段共聚物为邵氏硬度在50-65A之间。
进一步的是：所述聚烯烃嵌段共聚物为DSC熔点在115-125度内。
进一步的是：所述氯化聚乙烯是淄博济维泽化工有限公司的氯化聚乙烯135B。
进一步的是：所述发泡剂是AC发泡剂。
进一步的是：所述交联剂是BIBP。
进一步的是：所述耐磨剂是耐磨剂AG209。
一种制备所述轻量高弹EVA鞋底的制备方法，包括步骤：
步骤1：制备轻量高弹EVA料米，先将所有组分原料混合进行密炼，调整密炼温度为 95-98℃，保持 4-6min，然后翻料2次，继续密炼升温，出料温度为105-107℃，密炼结束后进行开炼、造粒，得到轻量高弹EVA料米。
步骤2：将料米倒入一次EVA注射机台的吸料桶，经一次射出成型得到轻量高弹EVA鞋底。
通过采取前述技术方案，本发明具有如下有益效果：
1，本发明使用结晶温度高、力学性能好的聚烯烃嵌段共聚物作为EVA的改性剂，提供优异的回弹性，又能有效控制收缩保持尺寸稳定，得到的轻量高弹EVA鞋底具有硬度小、弹性高、尺寸稳定性好、力学性能优异等特点，具有比较好的缓冲和支撑性，提高了穿着舒适性，大大改善了软质高弹发泡材料的尺寸稳定性差、收缩变形大、力学性能差等问题。
2，本发明利用橡胶弹性体共混改性，同时提高表面极性，降低材料表面结晶率，有效解决了聚烯烃嵌段共聚物和EVA材料都存在的表面起皱问题。
3，本发明得到的轻量高弹EVA鞋底，具有非常好的高温稳定性和抗压缩永久变形性，耐久性好，鞋子不会越穿越硬；普通EVA鞋底后跟部位的厚度是20-25mm ，使用发明的轻量高弹EVA鞋底可以更薄，只要15-18mm就能达到同样的效果，降低了鞋底的重量和生产成本。
4，本发明轻量高弹EVA鞋底的结晶温度高，产品定型快、合格率高；VA含量高，鞋底极性大，成型加工方便，大大提高了生产效率，适合批量化生产。
具体实施方式
现结合具体实施例对本发明进一步说明。
实施例1：
本实施例中，所述轻量高弹EVA鞋底由以下组分按重量份组成：
EVA 40W                          18 份
EVA 265                          22 份
聚烯烃嵌段共聚物9077             33 份
三元乙丙橡胶3745P                10 份
氯化聚乙烯135B                   6 份
发泡剂AC                         2.5 份
交联剂BIBP                       1.7 份
硬脂酸锌                         2.2 份
硬脂酸                           1.2 份
耐磨剂AG209                      2 份
滑石粉                           5份。
所述轻量高弹EVA鞋底的制备方法，包括步骤：
步骤1：制备轻量高弹EVA料米，先将所有组分原料混合进行密炼，调整密炼温度为 97℃，保持 6min，然后翻料2次，继续密炼升温，出料温度为106℃，密炼结束后进行开炼、造粒，得到轻量高弹EVA料米。
步骤2：将料米倒入一次EVA注射机台的吸料桶，经一次射出成型得到轻量高弹EVA鞋底。
上述制备得到的轻量高弹EVA鞋底，密度0.18 g/cm3，硬度 39，DIN耐磨171 mm3，尺寸收缩0.8%，回弹率60%，压缩变形率20%，撕裂强度5.8 N/mm，拉伸强度3.0 MPa，动态止滑系数平滑干式0.68湿式0.50，静态止滑系数干式0.57湿式0.45。
实施例2：
本实施例中，一种轻量高弹EVA鞋底的制备方法与实施例1中的制备方法相同，所不同的是原料配比中：
EVA 40W 30份、EVA 7470M 10份、聚烯烃嵌段共聚物9077 25份、交联剂BIBP 1.4份、耐磨剂AG209 3份。
上述制备得到的轻量高弹EVA鞋底，密度0.17g/cm3，硬度 36，DIN耐磨228mm3，尺寸收缩1.4%，回弹率59%，压缩变形率34%，撕裂强度4.0 N/mm，拉伸强度1.9 MPa，动态止滑系数平滑干式0.62湿式0.48，静态止滑系数干式0.51湿式0.40。
实施例3：
本实施例中，一种轻量高弹EVA鞋底的制备方法与实施例1中的制备方法相同，所不同的是原料配比中：
EVA 265 40份、聚烯烃嵌段共聚物9077 35份、三元乙丙橡胶3745P 12份、氯化聚乙烯135B 5份、交联剂BIBP 1.8份、滑石粉4份。
上述制备得到的轻量高弹EVA鞋底，密度0.18g/cm3，硬度 43，DIN耐磨267mm3，尺寸收缩0.6%，回弹率54%，压缩变形率29%，撕裂强度5.8 N/mm，拉伸强度2.3 MPa，动态止滑系数平滑干式0.57湿式0.42，静态止滑系数干式0.48湿式0.39。
实施例4：
本实施例中，一种轻量高弹EVA鞋底的制备方法与实施例1中的制备方法相同，所不同的是原料配比中：
EVA 40W 40份、聚烯烃嵌段共聚物9107 33份、氯化聚乙烯135B 8份、交联剂BIBP 1.8份、滑石粉6份。
上述制备得到的轻量高弹EVA鞋底，密度0.20g/cm3，硬度 38，DIN耐磨195mm3，尺寸收缩1.0%，回弹率62%，压缩变形率32%，撕裂强度5.2 N/mm，拉伸强度3.1 MPa，动态止滑系数平滑干式0.69湿式0.53，静态止滑系数干式0.57湿式0.47。
将上述实施例1 ～ 4 的数据整理后，得到如下表1（注：硬度采用GS-701N硬度计测试，DIN耐磨按照GB/T 9867：2001测试，尺寸收缩率按照GB∕T 3903.13测试，回弹率测试采用GT-7042-RE型冲击弹性试验机，压缩变形率按照HG/T 2876-2009测试，撕裂强度按照GB/T 10808-2006测试剖层撕裂，拉伸强度按照GB/T 10654-2001测试，动态止滑系数按照TM144：2011测试，静态止滑系数按照ASTM F1677：2005测试）： 
实施例 1 2 3 4
密度 (g/cm3) 0.18 0.17 0.18 0.20
硬度 39 36 43 38
DIN耐磨 (mm3) 171 228 267 195
尺寸收缩率 (%) 0.8 1.4 0.6 1.0
回弹性(%) 60 59 54 62
压缩变形率(%) 20 34 29 32
撕裂强度(N/mm) 5.8 4.0 5.8 5.2
拉伸强度(MPa) 3.0 1.9 2.3 3.1
动态止滑系数(平滑干式) 0.68 0.62 0.57 0.69
动态止滑系数(平滑湿式) 0.50 0.48 0.42 0.53
静态止滑系数(干式) 0.57 0.51 0.48 0.57
静态止滑系数(湿式) 0.45 0.40 0.39 0.47
表1、实施例1-4的性能参数对照表
综上所述，按照本发明的轻量高弹EVA鞋底的制备方法，能够制得具有高回弹、高尺寸稳定性、低压缩变形率、表面不易起皱等特点的轻量高弹EVA鞋底，而且具有质轻、综合性能好、产品合格率高等特点，可以使EVA鞋底更轻量化，特别适合生产高档EVA运动休闲鞋。
以上所记载，仅为利用本创作技术内容的实施例，任何熟悉本项技艺者运用本创作所做的修饰、变化，皆属本创作主张的专利范围，而不限于实施例所揭示者。

Claims (6)

1.一种轻量高弹EVA鞋底，其特征在于，由以下原料组成制得：原料EVA、聚烯烃嵌段共聚物、三元乙丙橡胶、氯化聚乙烯、发泡剂、交联剂、硬脂酸锌、硬脂酸、耐磨剂、滑石粉、颜料。
2.根据权利要求1所述的轻量高弹EVA鞋底，其特征在于：各原料的重量份如下：
EVA                               40 份
聚烯烃嵌段共聚物                  25 - 35 份
三元乙丙橡胶                      8 - 12 份
氯化聚乙烯                        5 - 8 份
发泡剂                            2.2 - 3 份
交联剂                            1.4 - 1.8 份
硬脂酸锌                          2–2.5 份
硬脂酸                            1–1.5 份
耐磨剂                            2 - 3 份
滑石粉                            4 - 6份。
3. 根据权利要求2所述的轻量高弹EVA鞋底，其特征在于：由以下组分按下列重量份原料制备而成:
EVA                              40 份
聚烯烃嵌段共聚物                  33 份
三元乙丙橡胶                      10 份
氯化聚乙烯                        6 份
发泡剂                            2.5 份
交联剂                            1.7 份
硬脂酸锌                          2.2 份
硬脂酸                            1.2 份
耐磨剂                            2 份
滑石粉                            5份。
4. 根据权利要求1或2所述轻量高弹EVA鞋底，其特征在于：所述EVA是VA含量大于25%的EVA；所述三元乙丙橡胶为丙烯基含量在29-39%之间，亚乙基降冰片含量在0.1-1.0%范围内。
5. 根据权利要求1或2所述轻量高弹EVA鞋底，其特征在于：所述为聚烯烃嵌段共聚物为邵氏硬度在50-65A之间，DSC熔点在115-125度内。
6. 一种制备权利要求1-5任一所述轻量高弹EVA鞋底的制备方法，其特征在于，包括步骤：
步骤1：制备轻量高弹EVA料米，先将原料EVA、聚烯烃嵌段共聚物、三元乙丙橡胶、氯化聚乙烯、发泡剂、交联剂、硬脂酸锌、硬脂酸、耐磨剂、滑石粉、颜料混合进行密炼，调整密炼温度为 95-98℃，保持 4-6min，然后翻料2次，继续密炼升温，出料温度为105-107℃，密炼结束后进行开炼、造粒，得到轻量高弹EVA料米；
步骤2：将轻量高弹EVA料米倒入一次EVA注射机台的吸料桶，经一次射出成型得到轻量高弹EVA鞋底。
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