CN116948362A - 一种改性热塑性聚酯弹性体、改性热塑性聚酯弹性体的eva发泡鞋底及其制备方法 - Google Patents
一种改性热塑性聚酯弹性体、改性热塑性聚酯弹性体的eva发泡鞋底及其制备方法 Download PDFInfo
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Abstract
本发明公开了一种改性热塑性聚酯弹性体,包括原料组分:热塑性聚酯弹性体(TPEE)30‑50份;乙烯‑丙烯‑非共轭二烯烃(EPDM)10‑20份;苯乙烯‑乙烯‑丁烯‑苯乙烯嵌段共聚物(SEBS)15‑30份;乙烯‑辛烯共聚物(POE)5‑10份,苯乙烯‑乙烯‑丁烯‑苯乙烯嵌段共聚物接枝马来酸酐(SEBS‑g‑MAH)10‑15份;乙烯‑辛烯嵌段共聚物接枝马来酸酐(POE‑g‑MAH)10‑15份。本发明还公开了包括上述改性热塑性聚酯弹性体的EVA发泡鞋底及其鞋底的化学、物理发泡制备方法,本发明鞋底具有良好的抗弯曲耐疲劳性与耐冲击性能,能解决鞋底足底受力部位易塌陷、边墙易起皱等问题。
Description
技术领域
本发明涉及鞋底制作技术领域,更具体的涉及一种改性热塑性聚酯弹性体、改性热塑性聚酯弹性体的EVA发泡鞋底及其制备方法。
背景技术
随着鞋材行业的日渐成熟,鞋用发泡材料体系不断扩充,热塑性聚酯弹性体(TPEE)近年来发泡材料在鞋材方面得到越来越多的应用。TPEE是一类含有聚酯硬段和脂肪族聚酯或聚醚软段的线型嵌段共聚物,兼具橡胶优良的弹性和热塑性塑料的易加工性,硬软段的结合使其具有优异的抗弯曲耐疲劳性与耐冲击性。TPEE与乙烯-醋酸乙烯酯搭配使用可有效改善足底受力部位易塌陷且不易恢复、边墙易起皱等问题。但是,TPEE作为鞋材,如果直接与其他弹性体共混,其熔点过高,很难达到分子级别的相容,存在一定的风险,影响发泡材料的泡孔均匀程度及物理性能。同时,TPEE的熔体强度较低,在发泡过程中很难锁住泡孔内气体,易导致泡孔不均匀。
有鉴于此,本发明提出一种改性热塑性聚酯弹性体、改性热塑性聚酯弹性体的EVA发泡鞋底及其制备方法,通过对TPEE共混改性,发挥其优异的抗弯曲耐疲劳性与耐冲击性能,然后再与EVA共混发泡来解决鞋底足底受力部位易塌陷、边墙易起皱等问题。
发明内容
为实现上述目的,本发明采用以下技术方案:
一种改性热塑性聚酯弹性体,按照质量份数,包含以下原料组分:热塑性聚酯弹性体(TPEE)30-50份;乙烯-丙烯-非共轭二烯烃(EPDM)10-20份;苯乙烯-乙烯-丁烯-苯乙烯嵌段共聚物(SEBS)15-30份;乙烯-辛烯共聚物(POE)5-10份;苯乙烯-乙烯-丁烯-苯乙烯嵌段共聚物接枝马来酸酐(SEBS-g-MAH)10-15份;乙烯-辛烯嵌段共聚物接枝马来酸酐(POE-g-MAH)10-15份。
优选地,所述改性热塑性聚酯弹性体,按照质量份数,包含以下原料组分:热塑性聚酯弹性体(TPEE)35份;乙烯-丙烯-非共轭二烯烃(EPDM)10份;苯乙烯-乙烯-丁烯-苯乙烯嵌段共聚物(SEBS) 20份;乙烯-辛烯共聚物(POE)10份;苯乙烯-乙烯-丁烯-苯乙烯嵌段共聚物接枝马来酸酐(SEBS-g-MAH)15份;乙烯-辛烯嵌段共聚物接枝马来酸酐(POE-g-MAH)10份。
优选地,所述TPEE的熔融指数为20g/min,密度为1.13g/cm3,硬度为40 Shore D。
优选地,所述EPDM密度为0.88g/cm3,乙烯含量为70%,丙烯含量为30.5%。
优选地,所述SEBS苯乙烯含量为33%,硬度为76 Shore D。
优选地,所述POE熔融指数为0.5g/min密度为0.868g/cm3。
本发明还公开了上述改性热塑性聚酯弹性体的制备工艺,采用上述改性热塑性聚酯弹性体的原料,按照以下步骤进行制备:
S1称取上述改性热塑性聚酯弹性体的原料,混合均匀后备用。
S2打开双螺杆挤出机的加热开关,将各加热区温度设定如下:一区设定温度:160℃,二区设定温度:162℃,三区设定温度:164℃,四区设定温度:164℃,五区设定温度:168℃,六区设定温度:170℃,七区设定温度:170℃,八区设定温度:170℃;
S3待八个区加热温度达到设定温度时,将备好的料倒入料斗,开启螺杆并调整螺杆转速,使物料在双螺杆内部充分混合熔融;
S4待模头挤出物料后,去除掉含有杂料的部分,牵引挤出料经过冷却水槽至烘箱,物料通过冷却水冷却,在烘箱内干燥,即得到改性热塑性聚酯弹性体。
本发明还公开了改性热塑性聚酯弹性体的EVA发泡鞋底,按照质量份数,包含以下原料组分:改性热塑性聚酯弹性体10-50份,乙烯-醋酸乙烯酯(EVA)50-90份,硬脂酸(ST)0.35-0.55份,交联剂0.3-0.5份。
进一步地,改性热塑性聚酯弹性体的EVA发泡鞋底,按照质量份数,还包括以下原料组分:氧化锌(ZnO)1.0-1.5份,硬脂酸锌(ZnSt)0.5-1.0份,钛白粉2.5-3.0份,发泡剂3-6份。
本发明还公开了上述改性热塑性聚酯弹性体的EVA发泡鞋底的化学发泡制作工艺,采用上述改性热塑性聚酯弹性体的EVA发泡鞋底原料,按照以下步骤进行制备:
S1.配料,将交联剂和发泡剂为第一组称好;将改性热塑性聚酯弹性体,乙烯-醋酸乙烯酯,硬脂酸,氧化锌,硬脂酸锌,钛白粉,交联剂,发泡剂为第二组称好备用。
S2.混炼,将第二组料倒入密炼机内,并启动机器,待温度升到105℃,倒入第一组料;待温度升到110℃时,出料。
S3.薄通,将混炼好的胶料薄通,开炼机前辊温度:70℃;后辊温度:40℃,调整滚轮间隙为5-10mm,薄通两次,然后将滚轮厚度调整为2-3mm,再薄通两次后即可将其放入造粒机料斗进行造粒操作。
S4.造粒,将薄通好的胶料倒入造料机中,第一、二、三、四区温度分别调为:80℃、80℃、90℃、85℃。并且,将螺杆转速调至45r/min,将切料转速调至12r/min。
S5.小发泡,将造好的颗粒料倒入小发泡模具内,小发泡模具上下板温都调为165℃,硫化时间为580秒,得到小发泡半成品。
S6.打磨,用砂轮和布轮打磨,磨去小发泡表面的杂料和污垢。
S7.模压,将半成品脱模后压入平板模压模具内,即得到改性热塑性聚酯弹性体的EVA化学发泡鞋底。
本发明还公开了上述改性热塑性聚酯弹性体的EVA发泡鞋底的物理发泡制作工艺,采用上述改性热塑性聚酯弹性体的EVA发泡鞋底原料,按照以下步骤进行制备:
S1.配料,将交联剂为第一组称好;将改性热塑性聚酯弹性体,乙烯-醋酸乙烯酯,硬脂酸为第二组称好备用。
S2.混炼,将第二组料倒入密炼机内,并启动机器,待温度升到105℃,倒入第一组料;待温度升到110℃时,出料。
S3.薄通,将混炼好的胶料薄通,开炼机前辊温度:70℃;后辊温度:40℃,调整滚轮间隙为5-10mm,薄通两次,然后将滚轮厚度调整为2-3mm,再薄通两次后即可将其放入造粒机料斗进行造粒操作。
S4.造粒,将薄通好的胶料倒入造料机中,第一、二、三、四区温度分别调为:80℃、80℃、90℃、85℃。并且,将螺杆转速调至45r/min,将切料转速调至12r/min。
S5.注塑冷胚,将造好的料倒入注塑机内,喂料,第一、二、三、四区温度全部设置为95℃,将料量依据模具用量设定好,硫化时间为200-500秒,得到冷胚。
S6.发泡,将注塑冷胚放入发泡釜中发泡,先加温加压待注塑冷胚中气体饱和后再泄压即可得到发泡粗胚。发泡釜的压力设置12-15MPa,温度设置135-145℃,气体饱和的时间为4-6h,泄压的时间为10-20s。
S7.模压,将发泡粗胚压入平板模压模具内,即得到改性热塑性聚酯弹性体的EVA物理发泡鞋底。
采用上述技术方案,本发明的有益效果是:TPEE的熔点较高,熔体强度较低,在发泡过程中易导致泡孔不均匀,不适宜直接当作鞋材使用。本发明将TPEE与苯乙烯-乙烯-丁二烯-苯乙烯共聚物(SEBS),乙烯-辛烯共聚物(POE),乙烯-丙烯-非共轭二烯烃(EPDM)共混改性,然后与EVA共混发泡,可有效改善泡孔大小的均匀性,提升耐疲劳性能,能有效改善鞋底足部受力部位易塌陷,边墙易起皱等问题。
具体实施方式
为了使本领域的技术人员更好地理解本发明的技术方案,下面结合具体实施例对本发明作进一步详细的描述。
实施例一
本实施例公开了一种改性热塑性聚酯弹性体,按照质量份数,包含以下原料组分:热塑性聚酯弹性体(TPEE)30-50份;乙烯-丙烯-非共轭二烯烃(EPDM)10-20份;苯乙烯-乙烯-丁烯-苯乙烯嵌段共聚物(SEBS)15-30份;乙烯-辛烯共聚物(POE)5-10份;苯乙烯-乙烯-丁烯-苯乙烯嵌段共聚物接枝马来酸酐(SEBS-g-MAH)10-15份;乙烯-辛烯嵌段共聚物接枝马来酸酐(POE-g-MAH)10-15份。
根据原料组分进行具体材料的选型,如下表1所示。
表1原料组分的材料选型
根据原料的配比,进行表2的配比。
表2原料组分的配比(质量份数)
按照如上表2的配方进行改性热塑性聚酯弹性体的制备,其制备步骤如下详述。
S1称取如上表2的原料,混合均匀后备用。
S2打开双螺杆挤出机的加热开关,将各加热区温度设定如下:一区设定温度:160℃,二区设定温度:162℃,三区设定温度:164℃,四区设定温度:164℃,五区设定温度:168℃,六区设定温度:170℃,七区设定温度:170℃,八区设定温度:170℃。
S3待八个区加热温度达到设定温度时,将备好的料倒入料斗,开启螺杆并调整螺杆转速,使物料在双螺杆内部充分混合熔融。
S4待模头挤出物料后,去除掉含有杂料的部分,牵引挤出料经过冷却水槽至烘箱,物料通过冷却水冷却,在烘箱内干燥,即得到改性热塑性聚酯弹性体。
实施案例二
本实施例公开了化学发泡的改性热塑性聚酯弹性体的EVA发泡鞋底,按照质量份数,包含以下原料组分:改性热塑性聚酯弹性体10-50份,乙烯-醋酸乙烯酯(EVA)50-90份,硬脂酸(ST)0.35-0.55份,氧化锌(ZnO)1.0-1.5份,硬脂酸锌(ZnSt)0.5-1.0份,钛白粉2.5-3.0份,交联剂0.3-0.5份,发泡剂3-6份。
改性热塑性聚酯弹性体是实施案例一的材料。
根据改性热塑性聚酯弹性体的EVA发泡鞋底原料的配比,进行表3的配比。
表3原料组分的配比(质量份数)
按照如上表3的配方进行改性热塑性聚酯弹性体的EVA化学发泡鞋底的制备,其制备步骤如下详述。
S1.配料,依据配方的用量,将交联剂和发泡剂为第一组称好;将改性热塑性聚酯弹性体、乙烯-醋酸乙烯酯为第二组称好备用。
S2.混炼,将第二组料倒入密炼机内,并启动机器,待温度升到105℃,倒入第一组料;待温度升到110℃时,出料。
S3.薄通,将混炼好的胶料薄通,开炼机前辊温度:70℃;后辊温度:40℃,调整滚轮间隙为5-10mm,薄通两次,然后将滚轮厚度调整为2-3mm,再薄通两次后即可将其放入造粒机料斗进行造粒操作。
S4.造粒,将薄通好的胶料倒入造料机中,第一、二、三、四区温度分别调为:80℃、80℃、90℃、85℃。并且,将螺杆转速调至45r/min,将切料转速调至12r/min。
S5.小发泡,将造好的颗粒料倒入小发泡模具内,小发泡模具上下板温都调为165℃,硫化时间为580秒,得到小发泡半成品。
S6.打磨,用砂轮和布轮打磨,磨去小发泡表面的杂料和污垢。
S7.模压,将半成品脱模后压入平板模压模具内,得到改性热塑性聚酯弹性体的EVA化学发泡鞋底。
针对本实施例配比得到的改性热塑性聚酯弹性体的EVA化学发泡鞋底,进行了抗疲劳性能实验测试,实验方法依照“GB/T 38018-2019 鞋类 鞋底测试方法 抗疲劳性能”,设置力值1200N,压缩次数40000次,对试样进行连续压缩。压缩测试结束后,测量疲劳压缩部位的厚度,得结果如下表所示。
表4化学发泡鞋底抗疲劳性能测试结果
实施案例三
本实施例公开了物理发泡的改性热塑性聚酯弹性体的EVA发泡鞋底,按照质量份数,包含以下原料组分:改性热塑性聚酯弹性体10-50份,乙烯-醋酸乙烯酯(EVA)50-90份,硬脂酸(ST)0.35份,交联剂0.45份。
改性热塑性聚酯弹性体是实施案例一的材料。
根据改性热塑性聚酯弹性体的EVA发泡鞋底原料的配比,进行表5的配比。
表5原料组分的配比(质量份数)
原料组分/实施组别 | I | J | K | L | M |
改性热塑性聚酯弹性体(表2,A组别) | 50 | 40 | 30 | 20 | 10 |
乙烯-醋酸乙烯酯(EVA) | 50 | 60 | 70 | 80 | 90 |
硬脂酸(ST) | 0.35 | 0.35 | 0.35 | 0.35 | 0.35 |
氧化锌(ZnO) | 0.45 | 0.45 | 0.45 | 0.45 | 0.45 |
按照如上表5的配方进行改性热塑性聚酯弹性体的EVA物理发泡鞋底的制备,其制备步骤如下详述。
S1.配料,依据配方的用量,将交联剂和发泡剂为第一组称好;将改性热塑性聚酯弹性体、乙烯-醋酸乙烯酯为第二组称好备用。
S2.混炼,将第二组料倒入密炼机内,并启动机器,待温度升到105℃,倒入第一组料;待温度升到110℃时,出料。
S3.薄通,将混炼好的胶料薄通,开炼机前辊温度:70℃;后辊温度:40℃,调整滚轮间隙为5-10mm,薄通两次,然后将滚轮厚度调整为2-3mm,再薄通两次后即可将其放入造粒机料斗进行造粒操作。
S4.造粒,将薄通好的胶料倒入造料机中,第一、二、三、四区温度分别调为:80℃、80℃、90℃、85℃。并且,将螺杆转速调至45r/min,将切料转速调至12r/min。
S5. 注塑冷胚,将造好的料倒入注塑机内,喂料,第一、二、三、四区温度全部设置为95℃,将料量依据模具用量设定好,硫化时间为200-500秒,得到冷胚。
S6.发泡,将注塑冷胚放入发泡釜中发泡,先加温加压待注塑冷胚中气体饱和后再泄压即可得到发泡粗胚。其中实施I组别中,发泡釜的压力设置15MPa,温度设置145℃,气体饱和的时间为6h,泄压的时间为20s。 J组别中,发泡釜的压力设置14MPa,温度设置140℃,气体饱和的时间为5.5h,泄压的时间为15s。 K 组别中,发泡釜的压力设置13MPa,温度设置135℃,气体饱和的时间为4h,泄压的时间为10s。 L组别中,发泡釜的压力设置12MPa,温度设置145℃,气体饱和的时间为4h,泄压的时间为10s。 M组别中,发泡釜的压力设置15MPa,温度设置135℃,气体饱和的时间为6h,泄压的时间为15s。
S7.模压,将半成品脱模后压入平板模压模具内,即得到改性热塑性聚酯弹性体的EVA物理发泡鞋底。
针对本实施例配比得到的改性热塑性聚酯弹性体的EVA物理发泡鞋底,进行了抗疲劳性能实验测试,实验方法依照“GB/T 38018-2019 鞋类 鞋底测试方法 抗疲劳性能”,设置力值1200N,压缩次数40000次,对试样进行连续压缩。压缩测试结束后,测量疲劳压缩部位的厚度,得结果如下表所示。
表6物理发泡鞋底抗疲劳性能测试结果
以上所述,仅为本发明较佳的具体实施方式,但本发明的保护范围并不局限于此,任何熟悉本技术领域的技术人员在本发明揭露的技术范围内,可轻易想到的变化或替换,都应涵盖在本发明的保护范围之内。
Claims (8)
1.一种改性热塑性聚酯弹性体,按照质量份数,包含以下原料组分:热塑性聚酯弹性体(TPEE)30-50份;乙烯-丙烯-非共轭二烯烃(EPDM)10-20份;苯乙烯-乙烯-丁烯-苯乙烯嵌段共聚物(SEBS)15-30份;乙烯-辛烯共聚物(POE)5-10份;苯乙烯-乙烯-丁烯-苯乙烯嵌段共聚物接枝马来酸酐(SEBS-g-MAH)10-15份;乙烯-辛烯嵌段共聚物接枝马来酸酐(POE-g-MAH)10-15份。
2.如权利要求1所述的改性热塑性聚酯弹性体,按照质量份数,包含以下原料组分:热塑性聚酯弹性体(TPEE)35份;乙烯-丙烯-非共轭二烯烃(EPDM)10份;苯乙烯-乙烯-丁烯-苯乙烯嵌段共聚物(SEBS)20份;乙烯-辛烯共聚物(POE)10份;苯乙烯-乙烯-丁烯-苯乙烯嵌段共聚物接枝马来酸酐(SEBS-g-MAH)15份;乙烯-辛烯嵌段共聚物接枝马来酸酐(POE-g-MAH)10份。
3.一种改性热塑性聚酯弹性体的EVA发泡鞋底,按照质量份数,包含以下原料组分:改性热塑性聚酯弹性体10-50份,所述的改性热塑性聚酯弹性体为权利要求1或2所述的材料;乙烯-醋酸乙烯酯(EVA)50-90份;硬脂酸(ST)0.35-0.55份;交联剂0.3-0.5份。
4.如权利要求3所述的一种改性热塑性聚酯弹性体的EVA发泡鞋底,其特征在于,按照质量份数,还包括以下原料组分:氧化锌(ZnO)1.0-1.5份,硬脂酸锌(ZnSt)0.5-1.0份,钛白粉2.5-3.0份,发泡剂3-6份。
5.一种改性热塑性聚酯弹性体的EVA发泡鞋底的化学发泡制备方法,其特征在于,采用权利要求4所述的改性热塑性聚酯弹性体的EVA发泡鞋底材料,按照以下步骤制备:
S1.配料,依据配方的用量,将交联剂和发泡剂为第一组称好;将其它原料组分为第二组称好备用;
S2.混炼,将第二组料倒入密炼机内,并启动机器,待温度升到105℃,倒入第一组料;待温度升到110℃时,出料;
S3.薄通,将混炼好的胶料薄通;
S4.造粒,将薄通好的胶料倒入造料机中造粒;
S5.小发泡,将造好的颗粒料倒入小发泡模具内进行发泡,得到小发泡半成品;
S6.打磨,用砂轮和布轮打磨,磨去小发泡半成品表面的杂料和污垢;
S7.模压,将半成品脱模后压入平板模压模具内,即得到改性热塑性聚酯弹性体的EVA化学发泡鞋底。
6.如权利要求5所述的一种改性热塑性聚酯弹性体的EVA发泡鞋底的化学发泡制备方法,其特征在于,所述S5步骤中,小发泡模具的上下板温度都设置为165℃,硫化时间设置为580秒。
7.一种改性热塑性聚酯弹性体的EVA发泡鞋底的物理发泡制备方法,其特征在于,采用权利要求3所述的改性热塑性聚酯弹性体的EVA发泡鞋底材料,按照以下步骤制备:
S1.配料,依据配方的用量,将交联剂为第一组称好;将其它原料组分为第二组称好备用;
S2.混炼,将第二组料倒入密炼机内,并启动机器,待温度升到105℃,倒入第一组料;待温度升到110℃时,出料;
S3.薄通,将混炼好的胶料薄通;
S4.造粒,将薄通好的胶料倒入造料机中造粒;
S5.注塑冷胚,将造好的料倒入注塑机内,喂料,第一、二、三、四区温度全部设置为95℃,将料量依据模具用量设定好,硫化时间为200-500秒,得到冷胚;
S6.发泡,将注塑冷胚放入发泡釜中发泡,先加温加压待注塑冷胚中气体饱和后再泄压即可得到发泡粗胚;
S7.模压,将发泡粗胚压入平板模压模具内,即得到改性热塑性聚酯弹性体的EVA物理发泡鞋底。
8.如权利要求7所述的一种改性热塑性聚酯弹性体的EVA发泡鞋底的物理发泡制备方法,其特征在于,所述S6步骤中,发泡釜的压力设置12-15MPa,温度设置135-145℃,气体饱和的时间为4-6h,泄压的时间为10-20s。
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