CN116656035B - 一种射出高倍率改性聚酯tpee发泡材料 - Google Patents
一种射出高倍率改性聚酯tpee发泡材料 Download PDFInfo
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Abstract
本发明发泡材料的配方领域,具体是公开一种射出高倍率改性聚酯TPEE发泡材料,材料配方包括主料、填充加工类助剂和发泡助剂,所述主料包括EVA、改性聚酯TPEE、POE和EPDM,如所述主料的配方重量份包括EVA为50‑70份、TPEE为10‑25份、POE为12‑25份和EPDM为7‑10份,所述填充加工类助剂和发泡助剂重量份为21‑26份,该材料配方适于射出发泡工艺生产、且能够达到大倍率发泡、更符合产品性能理想需求且生产效益较高。
Description
技术领域
本发明涉及发泡材料的配方领域。
背景技术
现有的一些轻质发泡材料采用射出发泡工艺实现的,业界已知的最大倍率约为175%,这种射出大倍率发泡生产存在着发泡开模后极易拉裂、发泡出来的不良率高达40%以上、发泡材料回弹缓震性能一般、穿着舒适度一般、尺寸稳定性差、耐疲劳性能差、使用容易皱褶变形、一模具多模穴发泡生产不理想、生产效益低等的问题,整体综合物性亮点少,品质不佳,不适于鞋底这类性能需求的产品应用,无法满足消费者穿着需求。
TPEE中文名称为热塑性聚酯弹性体,又称聚酯橡胶,其兼具橡胶优良的弹性和热塑性塑料的易加工性,软硬度可调,设计自由,是热塑性弹性体中倍受关注的新品种,相比PU泡沫、EVA发泡材料具有更高的回弹性能和耐候性,目前主要广泛应用于运动防护等领域所需发泡材料。虽然有部分公开的TPEE发泡材料的应用,但是针对鞋底产品上的应用,目前业内并没有理想产品发布,这主要是因为TPEE是一种熔点高、惰性难交联材质,难实现交联发泡,所以TPEE无法直接应用射出发泡工艺生产发泡材料,一些业内研究人员也进行过TPEE材料的射出发泡试产发泡材料试验,但是都没有得出较为满意可投入应用的样品,所以目前包含TPEE材料的主要都是采用物理发泡的工艺,。综上,适于鞋底这类性能需求且采用射出发泡工艺生产的TPEE发泡材料的技术方案还有待研发改进。
发明内容
本发明的目的在于提供一种适于射出发泡工艺生产、且能够达到大倍率发泡、更符合产品性能理想需求且生产效益较高的一种射出高倍率改性聚酯TPEE发泡材料。
为实现上述目的,本发明的技术方案是:一种射出高倍率改性聚酯TPEE发泡材料,材料配方包括主料、填充加工类助剂和发泡助剂,所述主料包括EVA、改性聚酯TPEE、POE和EPDM。
EVA采用VA含量为26%的EVA。
所述POE采用POE8150或POE8003。
所述填充加工类助剂包括滑石粉、耐磨剂、硬脂酸(ST)、硬脂酸锌(ZNST)(防粘剂)、氧化锌(ZNO)、(钛白粉R103二氧化钛);和/或,所述发泡助剂包括架桥助剂和高温发泡剂。
所述架桥助剂采用无味架桥剂14S,所述高温发泡剂采用高温发泡剂AC-6000。
所述主料的配方重量份包括EVA为50-70份、改性聚酯TPEE为10-30份、POE为12-25份和EPDM为7-10份,所述填充加工类助剂和发泡助剂重量份为21-26份。
所述POE为采用重量份12-25份的POE8150,或者,所述POE为采用重量份15-18份的POE8003。
所述填充加工类助剂的配方重量份包括滑石粉为3-6份、耐磨剂为8-9份、防粘剂为1-2份、氧化锌(ZNO)为1-2份、增白剂(钛白粉3份)为2-4份;所述发泡助剂的配方重量份包括架桥助剂0.5-2份和高温发泡剂3-4份。
所述防粘剂包括硬脂酸(ST)和硬脂酸锌(ZNST),所述硬脂酸(ST)重量份为0.3-2份、所述硬脂酸锌(ZNST)重量份为0.2-2份;和/或,所述增白剂采用钛白粉,重量份为3份;和/或,所述发泡助剂的配方重量份包括架桥助剂14S为0.5-2份和高温发泡剂AC-6000为3-4份。
一种射出高倍率改性聚酯TPEE发泡材料,其配方重量份如下:EVA为50份、改性聚酯TPEE为25份、POE8003为18份、EPDM为7份,滑石粉为3份、耐磨剂为8份、硬脂酸为0.5份、硬脂酸锌为0.8份、氧化锌为1.5份、钛白粉为3份、架桥助剂0.65份和高温发泡剂4份。
上述一种射出高倍率改性聚酯TPEE发泡材料通过射出发泡工艺进行生产。
通过采用上述技术方案,本发明的有益效果是:
1、上述发泡材料的配方中主料包括了EVA、改性聚酯TPEE、POE和EPDM,改性聚酯TPEE作为主料的应用解决了惰性材料难交联发泡的问题,提供了一种新的材料配方,适于多领域产品的应用,可满足多种不同性能需求的应用。
2、改性聚酯TPEE自身具有刚性的特点,能够使得生产出来的发泡材料具有刚性效果,且能够通过与EVA、POE和EPDM等这些其他主料的搭配、需求性能产品改进的配比,相辅相成,综合各种材料的优劣物性,使得生产出来的发泡材料能够达到符合适用产品的较好的目标值。
3、上述配方材料能够在生产加工中实现优异的流动性能和加工性能,能够适于射出发泡工艺的生产方式,可实现大倍率发泡,倍率约达175%,为现阶段射出业界最大倍率,尺寸稳定性能好。实现了一模多穴的同步射出发泡成型,跳模正常,不良率控制到6%以内。相比现有技术,成品效率的提升,射出理想发泡材料的实现,且能够较大提升生产效益。
4、上述配方材料生产出来的发泡材料材质具有轻质特点,可达到0.13g/cm3的产品密度,是射出发泡较为轻质的密度值;具有柔中带刚的特点,拨弹产品可明显具有钢清脆回弹的音色,产品有更好的支撑性能,使得发泡材料回弹缓震较好,尺寸稳定不易收缩,同时韧性极佳,不易断裂,可达到加高品质;具有舒适耐疲劳的特点,不易皱褶变形,以及其它优异特点,能够有效改善上述背景技术中现有材料的不足之处,特别适合于一种发泡鞋底产品的材料配方。
具体实施方式
为了进一步解释本发明的技术方案,下面通过具体实施例来对本发明进行详细阐述。
本发明为公开的一种射出高倍率改性聚酯TPEE发泡材料,材料配方包括主料、填充加工类助剂和发泡助剂,所述主料主要包括EVA(乙烯-醋酸乙烯共聚物)、改性聚酯TPEE(热塑性聚酯弹性体又称聚酯橡胶)、POE(乙烯和丁烯的高聚物或乙烯和辛烯的高聚物)和EPDM(三元乙丙橡胶)。采用改性聚酯TPEE,在发泡材料中主要起提升产品刚性效果以及可实现射出大倍率发泡且可解决惰性材料难交联发泡问题的作用。POE材料的特点具有优异的韧性、良好的加工性、优良的耐老化性能、分子相容性好、良好的流动性可改善填料的分散效果和可提高制品的熔接痕强度的特点。EPDM具有优越的耐氧化、抗臭氧和抗侵蚀的能力。EVA多领域中常见应用的发泡原料,具有韧性、抗冲击性、填料相溶性和热密封性能,通过这些材料作为主胶料,相辅相成,很好的综合各种材料的优劣物性,能够根据产品需要。参数值设定配比达到符合适用产品目标值,因此应用领域产品广泛,不同领域产品对助剂的添加可参考现有发泡材料技术或根据设计的产品需要等来进行添加应用,如下述公开的为应用于鞋底产品上的材料配方的实施例。
对于不同鞋底产品,其生产配方也不一样。下述公开的一种射出高倍率改性聚酯TPEE发泡材料优选配方是一种特别适合于鞋底产品应用且能够达到较高品质的发泡材料,其主料中的EVA采用VA含量为26%的EVA,所述POE可采用POE8150或POE8003,所述填充加工类助剂包括滑石粉、耐磨剂、防粘剂、氧化锌、增白剂,所述发泡助剂包括架桥助剂和高温发泡剂;滑石粉可起到填充及传热的作用,耐磨剂可提高材料的耐磨功能,防粘剂为防粘机台作用,氧化锌为碱性材质能够促进发泡,增白剂可提亮增白,架桥助剂为架桥交联剂,有利于射出交联发泡效果,高温发泡剂可提升发泡,使基料能够发泡膨大,本实施例中在应用于鞋底产品的生产材料,其中防粘剂采用硬脂酸(ST)和硬脂酸锌(ZNST),硬脂酸能够防粘及酸碱中和反应来促进发泡,硬脂酸锌能够防止密炼和开炼过程中不粘机台,两种结合能够更好的促进发泡及防粘,增白剂为二氧化钛,采用的是钛白粉R103,架桥助剂采用无味架桥剂14S,高温发泡剂采用高温发泡剂AC-6000。经过本案材料研发人员投入较多的时间精力进行深入研究、改进、试产、试验测试过程,得出上述各原料成分重量份,以获得所需理想产品的原料配比及适于射出发泡工艺进行生产大倍率发泡配方,其原料配比,具体如下。
所述主料的配方重量份包括EVA为50-70份、改性聚酯TPEE为10-25份、POE为12-25份和EPDM为7-10份,所述填充加工类助剂和发泡助剂重量份为21-26份;其中所述POE为采用重量份12-25份的POE8150,或者所述POE为采用重量份15-18份的POE8003;所述填充加工类助剂的配方重量份包括滑石粉为3-6份、耐磨剂为8-9份、防粘剂为1-2份、氧化锌为1-2份、增白剂为2-4份;所述发泡助剂的配方重量份包括架桥助剂0.5-2份和高温发泡剂3-4份。这些配比范围内的产品经过物性测试可达到鞋底产品的应用,且在产品回弹缓震性能、产品稳定性能、产品耐疲劳性能、产品抗变形性能上具有一定理想效果。
本实施例针对适合于鞋底产品应用且能够达到较高品质的发泡材料设定的理想物性目标值如下表格一,本实施例中提供了几个研发人员在试验测试过程中的发泡材料原料配比的物性测试结果报告表,如下表格二。
表格一
测试项目 | 目标值 |
硬度C | 43±2 |
比重g/cm3 | 0.13±0.02 |
回弹率% | ≥60 |
压缩变形% | ≤40 |
耐磨性能mm | ≤12 |
抗伸强度Mpa | ≥2.0 |
断裂伸长率% | ≥250 |
分层撕裂N/cm | ≥20 |
异味级 | 芳香烃气味、氨气味、其它异味≤3级 |
耐光色牢度B法级 | ≥4 |
耐老化级 | ≥3-4 |
鞋底低温耐折mm | 新裂纹≤5.0mm且不得超过三处 |
收缩性能%70℃*20min | ≤1.5 |
前掌回弹性能(%) | ≥50 |
后跟缓震性能(%/ | ≤12.5 |
表格二
表格二的原料配比,采用射出IP发泡工艺,射出发泡倍率可达175%,是业界TPEE发泡材料中射出最大倍率、密度最轻质的发泡材料,一套模具中两双中底同步发泡,不良率可控制在6%以内,发泡产品柔中带刚,回弹、缓震性能好,极佳的耐疲劳性能,产品尺寸稳定,收缩性能好。通过比对配方及测试物性,配方4为最优配方,其操作性能最佳,综合物性最优异,样品发泡正常,不良率最低,产品尺寸稳定,收缩性能好。
另外,在试产试验中还有对如下表格三的发泡材料配方及其物性测试值。
表格三
上述表格三配方7,加入改性聚酯TPEE用量到40份,发泡不起来,增加助剂氧化锌ZNO及高温发泡剂AC-6000效果不佳;而上述表格三配方6,降低改性聚酯TPEE用量到35份,材料有发泡,增加助剂氧化锌ZNO及高温发泡剂AC-6000,倍率没达目标值,硬度、密度大,回弹偏低;而上述表格三配方5,主胶料配比变化,改性聚酯TPEE用量为30份,发泡效果明显好于配方7和配方6,适当降低氧化锌ZNO、高温发泡剂用量,物性测试,硬度适中,密度降低,回弹率略低,已接近目标值。综上改性聚酯TPEE用量到30份以上难成型、综合物性不好,而在改性聚酯TPEE用量到10份以下则呈现改进所需的刚性效果则开始出现不好的情况。
下面的表格三是现市场上有量产的并且为比较主流的鞋底产品的发泡材料的配方及其物性测试值。
表格四
从表格四与表格一对比可以得出:
1、现有量产配方与表格二的配方,特别是配方4的产品物性相比,其密度、回弹率、压缩变形无法达到高品质的发泡材料理想物性目标值。
2、表格二的配方,特别是配方4的综合物性优异,物性亮点:材料钢性强,密度轻质,大倍率发泡不拉裂,回弹率高,耐压缩抗疲劳性能佳,收缩性能优越。
3、现有量产配方射出量产配方不良率约为10%,如表格二的配方,本发明配方为配方4,其量产不良率降至6.5%;整体物性更为优异。
上述实施例并非限定本发明的产品形态和式样,任何所属技术领域的普通技术人员对其所做的适当变化或修饰,皆应视为不脱离本发明的专利范畴。
Claims (3)
1.一种射出高倍率改性聚酯TPEE发泡材料,材料原料包括主料、填充加工类助剂和发泡助剂,其特征在于,所述主料包括EVA、改性聚酯TPEE、POE和EPDM;
所述主料的原料重量份包括EVA为50份、改性聚酯TPEE为25份、POE8003为18份、EPDM为7份,所述填充加工类助剂的原料重量份包括滑石粉为3份、耐磨剂为8份、硬脂酸为0.5份、硬脂酸锌为0.8份、氧化锌为1.5份、钛白粉为3份,所述发泡助剂的原料重量份包括架桥助剂0.65份和高温发泡剂4份。
2.如权利要求1所述的一种射出高倍率改性聚酯TPEE发泡材料,其特征在于,所述架桥助剂采用无味架桥剂14S,所述高温发泡剂采用高温发泡剂AC-6000。
3.如权利要求1或2所述的一种射出高倍率改性聚酯TPEE发泡材料,其特征在于:通过射出发泡工艺进行生产。
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