CN107513867A - 一种湿法低voc高耐久耐用型沙发家俱用聚氨酯合成革及其制备方法 - Google Patents

一种湿法低voc高耐久耐用型沙发家俱用聚氨酯合成革及其制备方法 Download PDF

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CN107513867A
CN107513867A CN201710721304.0A CN201710721304A CN107513867A CN 107513867 A CN107513867 A CN 107513867A CN 201710721304 A CN201710721304 A CN 201710721304A CN 107513867 A CN107513867 A CN 107513867A
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张吕香
王燕武
王振强
王锐林
戴俊
王森
黄万里
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Anhui Anli Material Technology Co Ltd
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Abstract

本发明提供一种湿法低VOC高耐久耐用型沙发家具用聚氨酯合成革的制备方法，其包括以下步骤：在预处理布基表面涂覆湿法聚氨酯浆料，经凝聚‑水洗‑预烘干‑烘干得湿法贝斯；用双组份水性聚氨酯树脂对湿法贝斯进行逆辊辊涂处理工艺制得高耐磨半成品，将高耐磨半成品通过辊压机压纹得到成品。本发明的制备工艺有利于加工环境的改善，又大大降低了溶剂的产出，成革VOC含量低可控制在100ppm以下；且耐久耐用，产品耐水解可达到10年以上。

Description

一种湿法低VOC高耐久耐用型沙发家俱用聚氨酯合成革及其 制备方法
技术领域
本发明涉及一种聚氨酯合成革，具体涉及一种湿法低VOC高耐久耐用型沙发家俱用聚氨酯合成革及其制备方法。
背景技术
随着人们都生活水平的提高，人们对合成革的环保性和耐久耐用性提出了较高的要求，市场上多数聚氨酯沙发家俱革一般只用到2-3年就出现了不同程度的表面脱皮现象，严重地影响了美观和使用。另外，湿法革在加工过程中因水洗不充分导致残留的溶剂(DMF)较多，再加上后段的溶剂型(DMF、ETAC)离型纸贴面工序，成革的VOC含量很难得到有效控制，很难满足欧盟的ROHS、REACH标准。
发明内容
本发明提供一种湿法低VOC高耐久耐用型沙发家俱用聚氨酯合成革的制备方法,所要解决技术的难题是降低湿法革的VOC含量，可控制在100ppm以下，同时通过配方、工艺设计提高成革的耐久耐用性能，产品耐水解可达到10年以上。
本发明是通过以下技术方案实现的：
一种湿法低VOC高耐久耐用型沙发家俱用聚氨酯合成革的制备方法,包括以下步骤：
(1)在预处理布基表面涂覆湿法聚氨酯浆料，经凝聚-水洗-预烘干-烘干得湿法贝斯；
(2)用双组份水性聚氨酯树脂对湿法贝斯进行逆辊辊涂处理工艺制得高耐磨半成品，
(3)将高耐磨半成品通过辊压机压纹得到成品。
进一步方案，所述预处理布基是指将布基先置于表面活性剂水溶液进行含浸预处理，然后经挤压、烫平得到的。
更进一步方案，所述表面活性剂溶液的质量浓度为1-3％，所述表面活性剂为磺酸化物类；所述布基为厚0.65mm的涤粘双面起毛布。
进一步方案，所述湿法聚氨酯浆料是由以下组分按重量份制备而成：
进一步方案，所述双组份水性聚氨酯树脂是由以下组分按重量份制备而成：
进一步方案，步骤(1)中湿法贝斯的厚度为0.9±0.03mm。
进一步方案，步骤(1)中的预烘干是采用长度为50m的立式“双S”型预烘箱结构以100-110℃温度进行加热；所述烘干是以长度为30m的烘箱以140-150℃温度进行加热。
进一步方案，步骤(2)中湿法贝斯经双组份水性聚氨酯树脂逆辊辊涂处理后上胶量为15-40g/m2。
进一步方案，步骤(3)中压纹的温度为175-195℃。
与已有技术相比，本发明有益效果体现在：
1、本发明先将布基置于表面活性剂水溶液进行含浸预处理，减少加工过程DMF的产出；而传统的湿法基布预处理液是20-35％DMF水溶液，而非清水，在加工过程中会有大量的DMF析出污染环境，在使用过程中也会以人体造成伤害。
2、湿法选用聚醚聚碳型树脂，此树脂本身耐水解性能优，水洗效果佳，湿法配方主辅料的复合搭配使用，辅料为高模量的全聚醚树脂SW-5168，高模量树脂起到支撑和提高强度的作用。
3、采用“湿式固化法”，在配方中加入水性封闭性固化剂如B-40，此固化剂在140℃时才解封反应，成革表面致密且耐磨；
4、湿法贝斯的制备经过预烘干和烘干两道工序进行处理，在经100-110℃预烘干的基础上再加入主烘箱中以140-150℃再烘干,双管齐下,在同等车速条件下,可以将革中的DMF溶剂烘的更彻底；另外对预烘箱进行了立式“双S”型改造，在不影响生产效率的基础上可增加湿法革的烘干时间减少VOC的含量。
5、本发明改变了传统的坯革溶剂型贴面工序，采用水性聚氨酯树脂逆辊辊涂处理工艺，即利于加工环境的改善，又大大降低了溶剂的产出，成革VOC含量低可控制在100ppm以下；且耐久耐用，产品耐水解可达到10年以上。
具体实施方式
下面结合具体实施方式，进一步阐释本发明。
实施例1：
一种湿法低VOC高耐久耐用型沙发家俱用聚氨酯合成革的制备方法，包括以下步骤：
(1)选择厚0.65mm的涤粘双面起毛布作为布基，先将布基先置于质量浓度为1-3％的表面活性剂水溶液进行含浸预处理，然后经挤压、烫平得到预处理布基；
(2)在预处理布基表面涂覆湿法聚氨酯浆料，经凝聚-水洗-预烘干-烘干得湿法贝斯；湿法贝斯的厚度为0.9mm；预烘干采用长度为50m的立式“双S”型预烘结构，预烘干温度为100℃；烘干是以长度为30m的烘箱以150℃温度进行加热。
(3)用双组份水性聚氨酯树脂对湿法贝斯进行逆辊辊涂处理工艺，其上胶量为15g/m2，制得高耐磨半成品，
(4)将高耐磨半成品通过辊压机于175℃压纹得到成品。
进一步方案，所述湿法聚氨酯浆料是由以下组分按重量份制备而成：
所述双组份水性聚氨酯树脂是由以下组分按重量份制备而成：
实施例2：
一种湿法低VOC高耐久耐用型沙发家俱用聚氨酯合成革的制备方法,包括以下步骤：
(1)选择厚0.65mm的涤粘双面起毛布作为布基，先将布基先置于质量浓度为1-3％的表面活性剂水溶液进行含浸预处理，然后经挤压、烫平得到预处理布基；
(2)在预处理布基表面涂覆湿法聚氨酯浆料，经凝聚-水洗-预烘干-烘干得湿法贝斯；湿法贝斯的厚度为0.93mm；预烘干采用长度为50m的立式“双S”型预烘结构，预烘干温度为110℃；烘干是以长度为30m的烘箱以140℃温度进行加热。
(3)用双组份水性聚氨酯树脂对湿法贝斯进行逆辊辊涂处理工艺，其上胶量为40g/m2，制得高耐磨半成品，
(4)将高耐磨半成品通过辊压机于195℃压纹得到成品。
其中，湿法聚氨酯浆料是由以下组分按重量份制备而成：
所述双组份水性聚氨酯树脂是由以下组分按重量份制备而成：
实施例3：
一种湿法低VOC高耐久耐用型沙发家俱用聚氨酯合成革的制备方法,包括以下步骤：
(1)选择厚0.65mm的涤粘双面起毛布作为布基，先将布基先置于质量浓度为1-3％的表面活性剂水溶液进行含浸预处理，然后经挤压、烫平得到预处理布基；
(2)在预处理布基表面涂覆湿法聚氨酯浆料，经凝聚-水洗-预烘干-烘干得湿法贝斯；湿法贝斯的厚度为0.87mm；预烘干采用长度为50m的立式“双S”型预烘结构，预烘干温度为105℃；烘干是以长度为30m的烘箱以145℃温度进行加热。
(3)用双组份水性聚氨酯树脂对湿法贝斯进行逆辊辊涂处理工艺，其上胶量为30g/m2，制得高耐磨半成品，
(4)将高耐磨半成品通过辊压机于185℃压纹得到成品。
其中，湿法聚氨酯浆料是由以下组分按重量份制备而成：
所述双组份水性聚氨酯树脂是由以下组分按重量份制备而成：
将上述实施例1-2制备的合成革产品与采用普通湿法、干法加工成的合成革的物性对比如下：
由上表可见，本发明制备的产品的VOC(VOC主要为DMF，加工中无其他有机溶剂)较普通革明显低，且耐用耐久性也较好。

Claims (9)

1.一种湿法低VOC高耐久耐用型沙发家俱用聚氨酯合成革的制备方法，其特征在于：包括以下步骤：
（1）在预处理布基表面涂覆湿法聚氨酯浆料，经凝聚-水洗-预烘干-烘干得湿法贝斯；
（2）用双组份水性聚氨酯树脂对湿法贝斯进行逆辊辊涂处理工艺制得高耐磨半成品，
（3）将高耐磨半成品通过辊压机压纹得到成品。
2.根据权利要求1所述的制备方法，其特征在于：所述预处理布基是指将布基先置于表面活性剂水溶液进行含浸预处理，然后经挤压、烫平得到的。
3.根据权利要求2所述的制备方法，其特征在于：所述表面活性剂溶液的质量浓度为1-3%，所述表面活性剂为磺酸化物类；所述布基为厚0.65mm的涤粘双面起毛布。
4.根据权利要求1所述的制备方法，其特征在于：所述湿法聚氨酯浆料是由以下组分按重量份制备而成：
聚醚聚碳型树脂 60-90份
高模量聚醚 10-40份
二甲基甲酰胺 60-100份
表面活性剂 1-3份
柔软剂 1-3份
脱DMF助剂 1-3份
封闭型固化剂 5-10份
色浆 0-5份
木质粉 5-15份
碳酸钙 5-20份。
5.根据权利要求1所述的制备方法，其特征在于：所述双组份水性聚氨酯树脂是由以下组分按重量份制备而成：
水性聚氨酯树脂 100份
增稠剂 0.4-2份
水性封闭性固化剂 3-8份
水性耐磨助剂 0.5-2份
色浆 2-4份。
6.根据权利要求1所述的制备方法，其特征在于：步骤（1）中湿法贝斯的厚度为0.9±0.03mm。
7.根据权利要求1所述的制备方法，其特征在于：步骤（1）中的预烘干是采用长度为50m的立式“双S”型预烘箱结构以100-110℃温度进行加热；所述烘干是以长度为30m的烘箱以140-150℃温度进行加热。
8.根据权利要求1所述的制备方法，其特征在于：步骤（2）中湿法贝斯经双组份水性聚氨酯树脂逆辊辊涂处理后上胶量为15-40g/m2。
9.根据权利要求1所述的制备方法，其特征在于：步骤（3）中压纹的温度为175-195℃。
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