CN104140519B - 低反弹冰凉透气海绵及其制备工艺 - Google Patents
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Abstract
本发明公开了一种低反弹冰凉透气海绵，按重量份包括以下组分：聚醚多元醇90‑110份，异氰酸酯30‑50份，胺类催化剂0.1‑0.3份，锡类催化剂0.1‑0.3份，稳定剂1‑3份，四硼酸钠1‑3份，氧化锌粉1‑3份，所述聚醚多元醇的羟值为230‑306。相应还提供了上述海绵的制备工艺：(1)将各原料按比例加入反应釜中混合搅拌均匀；(2)将搅拌后的混合物送入发泡箱内熟化、脱膜；(3)将熟化、脱膜处理后得到的海绵冷却24小时，然后加工切割成成品。该海绵在具有良好的回弹性、透气透湿性以及优异的力学性能的同时，还具有冰凉的效果。
Description
技术领域
本发明涉及海绵加工制备领域，特别是一种低反弹冰凉透气海绵及其制备工艺。
背景技术
海绵为一种聚氨酯泡沫塑料，特别可归为软质聚氨酯泡沫塑料内。其具有多孔状蜂窝的结构，所以具有优良的柔软性、弹性、吸水性、耐水性的特点，目前被广泛用于沙发、床垫、服装、软包装等各个行业。
低反弹海绵具有极好的回弹性能和记忆性能，因此由其制成的低回弹枕头和床垫能够让身体在一个自然的无压力位置得到休息。但是，当人体与低反弹海绵海绵长时间直接或间接接触后，海绵会吸收热量，温度会随之升高，特别是在炎热的天气，长时间坐卧在由低反弹海绵制成的沙发、坐垫、座椅上时，酷热的感觉更甚。
因此，如何提供一种具有冰凉性能的低反弹透气海绵，是本领域技术人员所需解决的技术问题。
发明内容
针对上述现有技术中存在的不足，本发明提供了一种低反弹冰凉透气海绵，该海绵在具有良好的低回弹性、透气透湿性以及优异的力学性能的同时，还具有冰凉的效果，克服了现有海绵容易吸热导致温度升高影响人体舒适性的问题。
本发明提供的低反弹冰凉透气海绵，按重量份包括以下组分：
所述聚醚多元醇的羟值为230-306mgKOH/g。
优选地，各组分的重量份为：
优选地，所述异氰酸酯为TDI80。
优选地，所述胺类催化剂为A33。
优选地，所述锡类催化剂为T9。
优选地，所述稳定剂为硅油。
相应地，本发明还提供了一种制备上述低反弹冰凉透气海绵的工艺，该工艺依次按如下步骤进行：
(1)将聚醚多元醇、异氰酸酯、胺类催化剂、锡类催化剂、稳定剂、硼砂和氧化锌粉按比例加入反应釜中混合搅拌均匀，搅拌转速为3000-5000r/min，温度为21-23℃之间；
(2)将搅拌后的混合物送入发泡箱内熟化、脱膜，熟化时间为100-150s；
(3)将熟化、脱膜处理后得到的海绵冷却24小时后，加工切割成成品。
本发明提供的低反弹冰凉透气海绵，具有如下有益效果：
1、具有良好的低回弹性、抗拉强度、撕裂强度等力学性能；
2、海绵温度较低，而且基本不会因和人体接触时间过长导致吸热温度升高，时刻给人以冰凉舒爽的感觉；
3、制备工艺简洁高效，便于规模化生产。
具体实施方式
为了使本技术领域的人员更好地理解本发明的技术方案，下面结合具体实施方式对本发明作进一步的详细说明。
术语解释：
TDI80：即甲苯二异氰酸酯，其中包含2，4-TDI和2，6-TDI两种异构体，2，4-TDI占80％，购自上海拜耳。
A33：牌号为A33的胺类催化剂，成分为33％的三乙烯二胺溶液，购自安吉宏威化工有限公司。
T9：牌号为T9的锡类催化剂，购自安吉宏威化工有限公司。
实施例1
取如下重量份的各组分，用原料罐进行配料：羟值为230-306的聚醚多元醇取90份,异氰酸酯TDI80取50份,胺类催化剂A33取0.1份,锡类催化剂T9取0.3份,硅油取1份,四硼酸钠取3份,氧化锌粉取1份。将上述各组分用原料罐配好后送入反应釜中混合，搅拌转速为3000r/min，温度为21℃，然后将搅拌后的混合物送入发泡箱内熟化、脱膜，熟化时间为100s，将熟化、脱膜处理后得到的海绵加工切割成成品。
实施例2
取如下重量份的各组分，用原料罐进行配料：羟值为230-306的聚醚多元醇取110份,异氰酸酯TDI80取30份,胺类催化剂A33取0.3份,锡类催化剂T9取0.1份,硅油取3份,四硼酸钠取1份,氧化锌粉取3份。将上述各组分用原料罐配好后送入反应釜中混合，搅拌转速为5000r/min，温度为23℃，然后将搅拌后的混合物送入发泡箱内熟化、脱膜，熟化时间为150s，将熟化、脱膜处理后得到的海绵加工切割成成品。
实施例3
取如下重量份的各组分，用原料罐进行配料：羟值为230-306的聚醚多元醇取100份,异氰酸酯TDI80取40份,胺类催化剂A33取0.2份,锡类催化剂T9取0.2份,硅油取2份,四硼酸钠取2份,氧化锌粉取2份。将上述各组分用原料罐配好后送入反应釜中混合，搅拌转速为4000r/min，温度为22℃，然后将搅拌后的混合物送入发泡箱内熟化、脱膜，熟化时间为120s，将熟化、脱膜处理后得到的海绵加工切割成成品。
实施例4
取如下重量份的各组分，用原料罐进行配料：羟值为230-306的聚醚多元醇取95份,异氰酸酯TDI80取40份,胺类催化剂A33取0.3份,锡类催化剂T9取0.2份,硅油取1份,四硼酸钠取2份,氧化锌粉取3份。将上述各组分用原料罐配好后送入反应釜中混合，搅拌转速为4500r/min，温度为22℃，然后将搅拌后的混合物送入发泡箱内熟化、脱膜，熟化时间为130s，将熟化、脱膜处理后得到的海绵加工切割成成品。
试验例1
对上述实施例1-4制备的海绵进行各项力学性能测试及透湿性测试，将测试结果记录在下表1中：
表中各性能测试的标准为：
回弹率：GB/T6670-2008
透湿性：GB/T12704
断裂伸长：ISO1798-1997
拉伸强度：ISO1798-1997
撕裂强度：ISO8067-1989
表1
试验例2
对本发明提供的低反弹冰凉透气海绵的冰凉程度进行感官试验，试验中，首先将实施例1-4中的海绵制成坐垫，令试验员在室温为28℃下坐在坐垫上感受其冰凉程度30分钟，感受海绵坐垫的冰凉程度，用“+”的多少表征，“+”越多表示越冰凉，具体评判标准见下表2：
表2.冰凉度感官试验评判标准
将使用者刚坐在海绵上感觉到的冰凉程度及30分钟后感觉到的冰凉程度记录在下表3中：
表3.刚坐在海绵坐垫上时的冰凉程度
| 实施例 | 初始冰凉度 | 30分钟后冰凉度 |
| 实施例1 | +++++ | ++++ |
| 实施例2 | +++++ | ++++ |
| 实施例3 | +++++ | ++++ |
| 实施例4 | +++++ | ++++ |
由上表结果可见，本发明提供的低反弹冰凉透气海绵，在制成坐垫后，不仅在刚使用时能够给人以冰凉舒适的感觉，而且在使用一定时间后，温度升高及吸热量也不明显，仍然能给人带来较好的凉爽效果。
以上对本发明所提供的一种低反弹冰凉透气海绵及其制备工艺进行了详细介绍。本文中应用了具体个例对本发明的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本发明的核心思想。应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明原理的前提下，还可以对本发明进行若干改进和修饰。这些改进和修饰也应当落入本发明权利要求的保护范围内。
Claims (3)
1.低反弹冰凉透气海绵，其特征在于，按重量份由以下组分组成：
所述聚醚多元醇的羟值为230-306mgKOH/g；
且所述低反弹冰凉透气海绵依次按照如下步骤制备：
(1)将聚醚多元醇、异氰酸酯、胺类催化剂、锡类催化剂、稳定剂、硼砂和氧化锌粉按比例加入反应釜中混合搅拌均匀，搅拌转速为3000-5000r/min，温度为21-23℃之间；
(2)将搅拌后的混合物送入发泡箱内熟化、脱膜，熟化时间为100-150s；
(3)将熟化、脱膜处理后得到的海绵冷却24小时，然后加工切割成成品；
所述异氰酸酯为TDI80；
所述胺类催化剂为A33；
所述锡类催化剂为T9；
所述稳定剂为硅油。
2.根据权利要求1所述的低反弹冰凉透气海绵，其特征在于，各组分的重量份为：
3.一种制备权利要求1或2所述低反弹冰凉透气海绵的工艺，其特征在于，依次按如下步骤进行：
(1)将聚醚多元醇、异氰酸酯、胺类催化剂、锡类催化剂、稳定剂、硼砂和氧化锌粉按比例加入反应釜中混合搅拌均匀，搅拌转速为3000-5000r/min，温度为21-23℃之间；
(2)将搅拌后的混合物送入发泡箱内熟化、脱膜，熟化时间为100-150s；
(3)将熟化、脱膜处理后得到的海绵冷却24小时，然后加工切割成成品。
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