CN105484055A - 聚氨酯干法中层、聚氨酯合成革及其制备方法 - Google Patents
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Abstract
本发明提出了聚氨酯干法中层、聚氨酯合成革及其制备方法。一种聚氨酯干法中层,按照重量份数计算,包括以下组分:耐水解型聚氨酯70-100份,填料30-60份,聚氨酯固化剂2-10份以及有机溶剂30-60份。一种聚氨酯合成革,包括聚氨酯干法面层、聚氨酯干法中层以及基材层,所述聚氨酯干法中层位于所述聚氨酯干法面层与所述基材层之间。其制备方法为:将聚氨酯干法面层的浆料涂布在离型纸上,然后加热烘干,烘干后在聚氨酯干法面层上涂布聚氨酯干法中层的粘合料,再进行加热烘干,烘干后经过贴合轮将基材压合在聚氨酯干法中层上面,再加热烘干熟成,最后冷却,剥离即可。该聚氨酯干法中层不仅结构紧密与无泡孔,而且该中层能够与基材层渗透,大大提高合成革耐磨性能。
Description
技术领域
本发明属于合成革技术领域,具体涉及一种聚氨酯干法中层、聚氨酯合成革及其制备方法。
背景技术
聚氨酯合成革一般由聚氨酯干法面层、聚氨酯湿法中层与布材三层结构组成,其中聚氨酯湿法中层为多孔结构。聚氨酯湿法中层存在大量的微孔结构,造成产品耐磨耐刮性能差。基本的耐磨性能只能达到TABER测试的H-18砂轮,负重500g,500~1000转破损,负重1KG耐刮性能只有100~1000次左右,更不必说钥匙这些尖锐物的刮割。普通的聚氨酯合成革剥离强度一般不超过5kgf/cm。
发明内容
为解决现有聚氨酯合成革存在的耐磨耐刮性能差的问题,本发明提出一种聚氨酯干法中层,其不仅结构紧密与无泡孔,而且该中层能够与基材层渗透,大大提高合成革耐磨性能。
本发明的技术方案是这样实现的:
一种聚氨酯干法中层,按照重量份数计算,包括以下组分:
耐水解型聚氨酯70-100份,填料30-60份,聚氨酯固化剂2-10份以及有机溶剂30-60份。
进一步,所述聚氨酯固化剂中的异氰酸根的质量百分含量为10-15%。
进一步,所述耐水解型聚氨酯的分子量为10万-40万。
进一步,所述填料选自重质碳酸钙、木质纤维素与硅藻土的一种或者多种。
进一步,所述有机溶剂选自二甲基甲酰胺、乙酸乙酯以及乙酸丁酯的一种或者多种。
该聚氨酯干法中层的制备方法为:
首先将耐水解型聚氨酯与有机溶剂混合搅拌均匀,然后缓慢加入填料,搅拌好的物料存放待生产,在生产前迅速加入聚氨酯固化剂进行快速搅拌,搅拌均匀后,尽快使用(此步骤避免固化剂的NCO活性基团失效)。
本发明的另一个目的是提供一种聚氨酯合成革,包括聚氨酯干法面层、聚氨酯干法中层以及基材层,所述聚氨酯干法中层位于所述聚氨酯干法面层与所述基材层之间,所述聚氨酯干法中层采用如上述聚氨酯干法中层。
进一步,所述基材层为布层。
本发明的再一个目的是提供一种聚氨酯合成革的制备方法,包括以下步骤:
将聚氨酯干法面层的浆料涂布在离型纸上,然后加热烘干,烘干后在聚氨酯干法面层上涂布聚氨酯干法中层的粘合料,再进行加热烘干,烘干后经过贴合轮将基材压合在聚氨酯干法中层上面,再加热烘干熟成,最后冷却,剥离即可。
进一步,具体讲包括以下步骤:
将聚氨酯干法面层的浆料涂布在离型纸上,烘箱温度110-130℃加热1-3分钟完全烘干,再将上述聚氨酯干法中层的粘合料涂布在烘干的面层上,然后经烘箱80-90℃加热1-3分钟,中层粘合料还保持渗透性(即未完全烘干),经过贴合轮贴合,通过控制贴合轮的贴合间隙控制中层粘合料的渗透率(例如:面层涂布为0.16mm,烘干后厚度为0.0272mm,而涂布中层涂布厚度为0.40mm,布材厚度为0.60mm的情况下,要想控制渗透率在50%的情况下,贴合轮间隙需设定为0.50mm,贴合压力均需大于0.2MPa),将布材压合,再经烘箱130℃加速固化、熟成,最后冷却,剥离。
物料渗透程度对产品的影响,参见表1:
表1物料渗透程度对产品物料性能的影响
本发明的有益效果:
本发明制备的聚氨酯合成革磨性能达到TABER测试的H-22砂轮,负重500g,2000转以上不破损,负重1KG耐刮性能超过10000次,为普通产品的10倍以上,而且使用钥匙这些尖锐物的刮割都不会破损,性能十分强悍。而一般聚氨酯合成革的耐磨性能只能达到TABER测试的H-18砂轮,负重500g,500-1000转破损,负重1KG耐刮性能只有100-1000次左右,剥离强度纵向,横向低于5kgf/cm,更不必说钥匙这些尖锐物的刮割。
具体实施方式
实施例1
一种聚氨酯干法中层,按照重量份数计算,其配方为:
耐水解型聚氨酯为旭川化学(XCS-3082S)用量80份,碳酸钙30份,聚氨酯固化剂为旭川(XAC-77)-固化剂(其异氰酸根的含量为13-14%)用量5份,乙酸乙酯与二甲基甲酰胺各15份。
其制备方法为:将旭川化学(XCS-3082S)溶解在乙酸乙酯与二甲基甲酰胺中,并且搅拌均匀,再缓慢加入碳酸钙搅拌好的物料存放待生产,在生产前迅速加入旭川(XAC-77)-固化剂进行快速搅拌,搅拌均匀后,尽快使用(此步骤避免固化剂的NCO活性基团失效)。
一种聚氨酯合成革,包括聚氨酯干法面层、聚氨酯干法中层以及基材层,所述聚氨酯干法中层位于所述聚氨酯干法面层与所述基材层之间,所述聚氨酯干法中层采用如上述实施例1中的聚氨酯干法中层。
实施例2
一种聚氨酯干法中层,按照重量份数计算,包括以下组分:
分子量为35-40万耐水解型聚氨酯70份,木质纤维素与硅藻土各20份,聚氨酯固化剂2份(其异氰酸根含量为10%)以及二甲基甲酰胺40份。
其制备方法为:将耐水解型聚氨酯溶解在二甲基甲酰胺中,并且搅拌均匀,再缓慢加入木质纤维素与硅藻土搅拌好的物料存放待生产,在生产前迅速加入聚氨酯固化剂进行快速搅拌,搅拌均匀后,尽快使用(此步骤避免固化剂的NCO活性基团失效)。
一种聚氨酯合成革,包括聚氨酯干法面层、聚氨酯干法中层以及基材层,所述聚氨酯干法中层位于所述聚氨酯干法面层与所述基材层之间,所述聚氨酯干法中层采用如上述实施例2中的聚氨酯干法中层。
实施例3
一种聚氨酯干法中层,按照重量份数计算,包括以下组分:
分子量为10-15万的耐水解型聚氨酯100份,木质纤维素与硅藻土各30份,聚氨酯固化剂8份(其异氰酸根含量为15%)以及乙酸丁酯60份。
其制备方法为:将耐水解型聚氨酯溶解在乙酸丁酯中,并且搅拌均匀,再缓慢加入木质纤维素与硅藻土搅拌好的物料存放待生产,在生产前迅速加入聚氨酯固化剂进行快速搅拌,搅拌均匀后,尽快使用(此步骤避免固化剂的NCO活性基团失效)。
一种聚氨酯合成革,包括聚氨酯干法面层、聚氨酯干法中层以及基材层,所述聚氨酯干法中层位于所述聚氨酯干法面层与所述基材层之间,所述聚氨酯干法中层采用如上述实施例3中的聚氨酯干法中层。
实施例4
一种聚氨酯干法中层,按照重量份数计算,包括以下组分:
分子量为15-18万的耐水解型聚氨酯90份,木质纤维素与硅藻土各30份,聚氨酯固化剂10份(其异氰酸根含量为12%)以及乙酸丁酯60份。
其制备方法为:将耐水解型聚氨酯溶解在乙酸丁酯中,并且搅拌均匀,再缓慢加入木质纤维素与硅藻土搅拌好的物料存放待生产,在生产前迅速加入聚氨酯固化剂进行快速搅拌,搅拌均匀后,尽快使用(此步骤避免固化剂的NCO活性基团失效)。
一种聚氨酯合成革,包括聚氨酯干法面层、聚氨酯干法中层以及基材层,所述聚氨酯干法中层位于所述聚氨酯干法面层与所述基材层之间,所述聚氨酯干法中层采用如上述实施例4中的聚氨酯干法中层。
实施例5
将实施例1-4制备得到的聚氨酯合成革进行TABER测试的H-22砂轮,结果如下:负重500g,2000转以上不破损,负重1KG耐刮性能超过10000次,而且使用钥匙这些尖锐物的刮割均不会破损,性能十分强悍。
以上所述仅为本发明的较佳实施例而已,并不用以限制本发明,凡在本发明的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。
Claims (8)
1.一种聚氨酯干法中层,其特征在于,按照重量份数计算,包括以下组分:
耐水解型聚氨酯70-100份,填料30-60份,聚氨酯固化剂2-10份以及有机溶剂30-60份。
2.根据权利要求1所述的聚氨酯干法中层,其特征在于,所述聚氨酯固化剂中的异氰酸根的质量百分含量为10-15%。
3.根据权利要求1或2所述的聚氨酯干法中层,其特征在于,所述耐水解型聚氨酯的分子量为10万-40万。
4.根据权利要求1或2所述的聚氨酯干法中层,其特征在于,所述填料选自重质碳酸钙、木质纤维素与硅藻土的一种或者多种。
5.根据权利要求1或2所述的聚氨酯干法中层,其特征在于,所述有机溶剂选自二甲基甲酰胺、乙酸乙酯以及乙酸丁酯的一种或者多种。
6.一种聚氨酯合成革,其特征在于,包括聚氨酯干法面层、聚氨酯干法中层以及基材层,所述聚氨酯干法中层位于所述聚氨酯干法面层与所述基材层之间,所述聚氨酯干法中层采用如权利要求1至5任意一项所述的聚氨酯干法中层。
7.根据权利要求6所述的聚氨酯合成革,其特征在于,所述基材层为布层。
8.如权利要求6所述的聚氨酯合成革的制备方法,其特征在于,包括以下步骤:
将聚氨酯干法面层的浆料涂布在离型纸上,然后加热烘干,烘干后在聚氨酯干法面层上涂布聚氨酯干法中层的粘合料,再进行加热烘干,烘干后经过贴合轮将基材压合在聚氨酯干法中层上面,再加热烘干熟成,最后冷却,剥离即可。
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