CN111961247B - 一种运动鞋中底及其制备方法 - Google Patents

一种运动鞋中底及其制备方法 Download PDF

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CN111961247B
CN111961247B CN202010846324.2A CN202010846324A CN111961247B CN 111961247 B CN111961247 B CN 111961247B CN 202010846324 A CN202010846324 A CN 202010846324A CN 111961247 B CN111961247 B CN 111961247B
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CN111961247A (zh
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冯建龙
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Guangdong Kangcheng New Material Science And Technology Co ltd
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Abstract

本发明提供一种运动鞋中底的制备方法，包括步骤：(1)将制备材料混炼制成片材结构的本体，所述制备材料包括TPU和助剂；(2)将所述本体置入模具腔中进行超临界发泡，制得片材结构的发泡体；(3)将所述发泡体裁切成运动鞋中底形状及所需尺寸，并进行打磨，得到运动鞋中底。本申请采用的方法中，主材料为TPU，可自然降解，对环境友好，同时制备方法简单、可有效提高良品率，提高生产效率及降低生产成本。本发明还提供一种采用上述方法制得的运动鞋中底，该运动鞋中底具有良好的回弹率、拉力强度、耐磨性。

Description

一种运动鞋中底及其制备方法
技术领域
本发明涉及运动鞋中底的制备技术领域，尤其是涉及一种运动鞋中底及其制备方法。
背景技术
目前用于运动鞋鞋底生产的材料主要有PVC、PU、EVE和TPU，其中的TPU由于性能突出和具有环保概念，开始崭露头角。PVC的价格低廉，但是温度低时，会变硬易折裂，温度高时又易变软，且有医学研究证明PVC会释放对人体有害的二恶英，先进国家的大型运动用品厂商如NIKE等已逐步用TPU等材料替代PVC；PU材料重量轻、耐热性好、抗磨损性好、寿命长、价格也较低，但专案的投资成本高(机器、模具和原材料)，成品难以重新再利用；EVE的柔韧性、弹性良好，耐化学品和着色性能优异，但生产工艺相对复杂，使用范围局限在中高档运动鞋的范围里。而TPU具有耐磨性强、抗张强度及断裂伸长率高、耐气候性良好等优点，虽然在硬度、重量和价格方面存在不足，但综合来看，TPU的应用市场更为广泛。
现有TPU应用于鞋材生产中所采用的工艺为TPU发泡工艺，主要为一次性发泡，即把材料注入/射入模具后通过高温加热后一次成型制得鞋中底。由于需要发泡得到鞋中底，发泡过程中各参数的控制要精确，且发泡装置中发泡鞋中底数量为若干，不同区域发泡情况会有区别，比较难控制得到发泡鞋中底的尺寸，使得成品率低，导致生产效率低及生产成本增加。
因此，有必要提供一种运动鞋中底及其制备方法来解决上述技术问题。
发明内容
本发明的目的之一是提供一种运动鞋中底的制备方法，该方法采用的主材料为TPU，可自然降解，对环境友好，同时制备方法简单、可有效提高良品率，提高生产效率及降低生产成本。
本发明的目的之二是提供一种采用上述方法制得的运动鞋中底。
为实现上述目的，本发明提供了一种运动鞋中底的制备方法，包括步骤：
(1)将制备材料混炼制成片材结构的本体，所述制备材料包括TPU和助剂；
(2)将所述本体置入模具腔中进行超临界发泡，制得片材结构的发泡体；
(3)将所述发泡体裁切成运动鞋中底形状及所需尺寸，并进行打磨，得到运动鞋中底。
与现有技术相比，本申请的运动鞋中底的制备方法中，先将制备材料进行混炼制得片材结构的本体，然后将片材结构的本体置于模具腔中进行超临界发泡，制得片材结构的发泡体，再将发泡体裁切成运动鞋中底形状及所需尺寸，并进行打磨，得到运动鞋中底。由于是将发泡材料先混炼制得片材结构的本体，再对其进行超临界发泡得到片材结构的发泡体，并不涉及发泡成运动鞋中底的尺寸和形状，对发泡参数及设备的要求相对而言比较简单，即工艺简单。同时，在发泡之后进行裁切和打磨，得到所需形状和尺寸，不仅精确且节约成本，可有效提高良品率，提高生产效率及降低生产成本。同时，该方法采用的主材料为TPU，可自然降解，对环境友好。
进一步的，步骤(2)中，于模具腔内通入氮气或二氧化碳，并升温至110-160℃、加压至10-70Mpa使其达到超临界状态，达到超临界状态后恒温、恒压后保持1-5h，然后迅速卸压至常压，得到发泡体。
进一步的，TPU的用量为60-80份，如60份、65份、70份、75份、80份。
进一步的，所述TPU为聚酯型TPU或聚醚型TPU，本申请中不含EVA，EVA不能回收利用，对环境不友好。本申请采用TPU材料，可自然降解，对环境友好。本发明对所述TPU主料的来源没有特殊限制，采用本领域技术人员熟知的市售商品即可。
进一步的，所述助剂包括0.5-5份的氧化剂、1-10份的增链剂、5-30份的成核剂、1-5份的活性剂、1-5份的促进剂、1-5份的弹性添加剂。
进一步的，所述增链剂选自N-羟甲基丙烯酰胺，通过在该TPU体系中引入N-羟甲基丙烯酰胺，以进一步提高运动鞋中底的耐磨性。增链剂的用量可为但不限于1份、2份、3份、4份、5份。
进一步的，所述促进剂选自二甲基氨苯，通过引入二甲基氨苯，能够使得TPU与增链剂、成核剂、弹性添加剂等助剂相容稳定，且分散均匀。促进剂的用量可为但不限于1份、2份、3份、4份、5份。
进一步的，所述成核剂选自短纤维、白炭黑、蒙脱土、碳酸钙、滑石粉中的至少一种。在本发明中，成核剂主要作为填料，分散在基体中有利于成核结晶和提高树脂的强度。成核剂的用量可为但不限于5份、10份、15份、20份、25份、30份。
进一步的，所述活性剂选自硬脂酸或硬脂酸锌中的至少一种。活性剂的用量可为但不限于1份、2份、3份、4份、5份。
进一步的，所述弹性添加剂选自乙烯基环辛烯，通过在该TPU体系中引入乙烯基环辛烯，以进一步提高运动鞋中底的弹性，回弹更佳。弹性添加剂的用量可为但不限于1份、2份、3份、4份、5份。
进一步的，所述氧化剂三[2.4-二叔丁基苯基]亚磷酸酯，即抗氧剂168，还可为抗氧剂1010，抗氧剂1076等。
相应地，本申请还提供了一种运动鞋中底，采用上述的运动鞋中底的制备方法制得
具体实施方式
下面将结合本发明实施例，对本发明的技术方案进行清楚、完整地描述，显然，所描述的实施例仅是本发明一部分实施例，而不是全部的实施例。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1
一种运动鞋中底的制备方法，包括步骤：
(1)将制备材料放入混炼机中混炼制成片材结构的本体，混炼温度设为80℃，制备材料包括70份的聚酯型TPU、0.5的氧化剂168、2份的N-羟甲基丙烯酰胺、17.5份的碳酸钙、2份的硬脂酸锌、4份的二甲基氨苯、4份的乙烯基环辛烯；
(2)将本体置入模具腔，于模具腔内通入氮气，并升温至130℃、加压至30Mpa使其达到超临界状态，达到超临界状态后恒温、恒压后保持3h，然后迅速卸压至常压，制得片材结构的发泡体；
(3)将发泡体裁切成若干个所需尺寸(如男士、38码)的运动鞋中底，并进行打磨，得到运动鞋中底。
实施例2
一种运动鞋中底的制备方法，包括步骤：
(1)将制备材料放入混炼机中混炼制成片材结构的本体，混炼温度设为90℃，制备材料包括60份的聚酯型TPU、2的氧化剂168、4份的N-羟甲基丙烯酰胺、23份的短纤维、5份的硬脂酸锌、2份的二甲基氨苯、4份的乙烯基环辛烯；
(2)将本体置入模具腔，于模具腔内通入二氧化碳，并升温至150℃、加压至50Mpa使其达到超临界状态，达到超临界状态后恒温、恒压后保持1h，然后迅速卸压至常压，制得片材结构的发泡体；
(3)将发泡体裁切成若干个所需尺寸(如女士、36码)的运动鞋中底，并进行打磨，得到运动鞋中底。
实施例3
一种运动鞋中底的制备方法，包括步骤：
(1)将制备材料放入混炼机中混炼制成片材结构的本体，混炼温度设为100℃，制备材料包括80份的聚醚型TPU、3的氧化剂168、2份的N-羟甲基丙烯酰胺、9份的白炭黑、1份的硬脂酸锌、3份的二甲基氨苯、2份的乙烯基环辛烯；
(2)将本体置入模具腔，于模具腔内通入氮气，并升温至140℃、加压至70Mpa使其达到超临界状态，达到超临界状态后恒温、恒压后保持5h，然后迅速卸压至常压，制得片材结构的发泡体；
(3)将发泡体裁切成若干个所需尺寸(如男士、42码)的运动鞋中底，并进行打磨，得到运动鞋中底。
实施例4
实施例4与实施例1基本相同，不同在于，实施例4不含增链剂N-羟甲基丙烯酰胺，其余与实施例1相同，在此不进行阐述。
实施例5
实施例5与实施例1基本相同，不同在于，实施例5不含弹性添加剂乙烯基环辛烯，其余与实施例1相同，在此不进行阐述。
对实施例1-5制备的运动鞋中底进行回弹率测试、拉力强度测试、耐磨性测试，测试结果见表1。
测试项目及条件如下：
回弹率测试(％)，测试标准为ASTM D2632-2001；
拉力强度测试(Mpa)，测试方法为GB/T1040.3-2006；
耐磨性能(磨痕长度mm)，测试方法为GB/T3903.2-2008。
表1测试结果
样品 回弹率(％) 拉力强度(Mpa) 磨痕长度mm
实施例1 68 3.4 9.6
实施例2 66 3.3 9.8
实施例3 70 3.6 9.6
实施例4 67 3.5 10.5
实施例5 61 3.4 9.7
从表1可知，本申请实施例1-5制得的运动鞋中底具有良好的回弹率、拉力强度、耐磨性。同时，从实施例4-5可知，缺少增链剂N-羟甲基丙烯酰胺时，耐磨性有所降低，缺少弹性添加剂乙烯基环辛烯时，回弹率有所降低。
应当指出，以上具体实施方式仅用于说明本发明而不用于限制本发明的范围，在阅读了本发明之后，本领域技术人员对本发明的各种等价形式的修改均落入本申请所附权利要求限定的范围。

Claims (7)

1.一种运动鞋中底的制备方法，其特征在于，包括步骤：
(1)将制备材料混炼制成片材结构的本体，所述制备材料包括TPU和助剂；
(2)将所述本体置入模具腔中进行超临界发泡，制得片材结构的发泡体；
(3)将所述发泡体裁切成运动鞋中底形状及所需尺寸，并进行打磨，得到运动鞋中底，
所述助剂选自0.5-5份的氧化剂、1-10份的增链剂、5-30份的成核剂、1-5份的活性剂、1-5份的促进剂、1-5份的弹性添加剂中的至少一种，所述增链剂选自N-羟甲基丙烯酰胺，所述弹性添加剂选自乙烯基环辛烯。
2.根据权利要求1所述的运动鞋中底的制备方法，其特征在于，步骤(2)中，于模具腔内通入氮气或二氧化碳，并升温至110-160℃、加压至10-70Mpa使其达到超临界状态，达到超临界状态后恒温、恒压条件下保持1-5h，然后迅速卸压至常压，得到发泡体。
3.根据权利要求1所述的运动鞋中底的制备方法，其特征在于，所述TPU为聚酯型TPU或聚醚型TPU中的至少一种。
4.根据权利要求1所述的运动鞋中底的制备方法，其特征在于，所述促进剂选自二甲基氨苯。
5.根据权利要求1所述的运动鞋中底的制备方法，其特征在于，所述成核剂选自短纤维、白炭黑、蒙脱土、碳酸钙、滑石粉中的至少一种。
6.根据权利要求1所述的运动鞋中底的制备方法，其特征在于，所述活性剂选自硬脂酸或硬脂酸锌中的至少一种。
7.一种运动鞋中底，其特征在于，采用如权利要求1-6任一项所述的运动鞋中底的制备方法制得。
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WO2018036504A1 (zh) * 2016-08-24 2018-03-01 唐靖 一种热塑性聚酯弹性体发泡用前体、发泡体及其制备方法
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