CN108505349A - 一种高日晒色牢度的超细纤维绒面革的制备方法 - Google Patents
一种高日晒色牢度的超细纤维绒面革的制备方法 Download PDFInfo
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Abstract
本发明涉及一种高日晒色牢度的超细纤维绒面革的制备方法,其采用定岛涤纶超细纤维制得超纤无纺布,经过含浸处理、减量处理、染色处理后,进行酸性还原清洗、碱性还原清洗,从而制得具有较高的日晒色牢度的超细纤维绒面革。本发明采用酸性还原清洗结合碱性还原清洗的工艺,将没有进入纤维内部的染料分子破坏,从而达到提高日晒色牢度的目的。
Description
技术领域
本发明涉及超细纤维绒面革领域,具体涉及一种高日晒色牢度的超细纤维绒面革的制备方法。
背景技术
合成革的诞生以及一直以来的改进发展均是以仿真皮或者接近天然皮革的特点为目的。超细纤维绒面革作为最新一代的合成皮革,其三维空间结构以及手感弹性是最接近天然皮革的产品,尤其与高档麂皮风格很接近。但超纤在高档服装面料特别是高档汽车内饰上应用还很少,最主要的原因是超细纤维纤度比较细,纤维直径小比表面积大, 对染料、吸附量也大大增加,要染得相同深度的色光,超细纤维所用燃料量是普通化纤的2-3倍,这将导致染色织物色湿牢度的下降,同时由于比表面积的增大,超细纤维能够充分吸收阳光,即以造成日晒牢度的下降,一般要下降1-2级。
通过选择合适的超细纤维专用分散染料、制定相应的染色工艺来改善涤纶超细纤维的染色性能,采用合适的匀染剂,能明显提高分散染料的上染同步性和截面解析、迁移性,增加分散染料的高温分散稳定性和染料之间的配伍性,可以较好地保证染色过程中色光的一致性。但是涤纶超细纤维直径较小,染料分子除部分进入到纤维内部外,还有一部分吸附在纤维表面,这也是导致色牢度差达不到较高日晒色牢度的主要原因。
目前生产的超细纤维绒面革采用37岛定岛尼龙超细纤维(PA6/COPET)或者37岛定岛涤纶超细纤维(PET/COPET)含浸油性聚氨酯或者普通水性聚氨酯后,经碱减量开纤,尼龙超细纤维经酸性染料染色,涤纶超细纤维经普通分散染料染色,从而加工成成品,其日晒牢度在3级及以下(5级制)。
发明内容
本发明的目的在于提供一种高日晒色牢度的超细纤维绒面革的制备方法,其具有较高日晒牢度。
为实现上述目的,本发明采用的技术方案是:
一种高日晒色牢度的超细纤维绒面革的制备方法,其包括:
步骤1、制备超细纤维无纺布;
将定岛涤纶超细纤维进行开松、梳理、铺网、针刺,制成超细纤维无纺布;
步骤2、将超细纤维无纺布进行含浸处理;
将超细纤维无纺布浸渍水性聚氨酯溶液,然后经过连续的温度梯度进行烘干,使聚氨酯在无纺布中具有微孔结构固化成膜,得到超细纤维基布;
步骤3、将超细纤维基布进行碱减量处理得到超细纤维白胚基布;
步骤4、将超细纤维白胚基布进行染色处理;
步骤5、进行酸性还原清洗和碱性还原清洗;
染色完成后,在染料溶液中加入酸性溶液进行酸性还原清洗,处理10-20min后,将染料溶液排掉,注入清水并将温度调整到50-70℃;然后加入碱性溶液进行碱性还原清洗,处理10-20min后,排出废液,并用清水洗净至中性,得到超细纤维绒面革,然后将该超细纤维绒面革在120-140℃的温度下进行定型烘干,得到超细纤维绒面革成品。
所述定岛涤纶超细纤的维细度为3dtex-6.5dtex×50mm,组分PET/COPET质量比例为90:10-50:50。
所述步骤1中,铺网时形成的铺网层数为10-25层;针刺时的针刺深度为15-35mm、针刺密度为150-400c/cm2。
所述步骤2中,将水性聚氨酯溶液的固含量为5-40%、粘度为300-450cps,超细纤维无纺布含浸处理后,其带液率为50-250%。
所述步骤2中,温度梯度为:第一梯度温度80℃,烘干时间1-3min;第二梯度温度120℃,烘干时间为1-3min;第三梯度温度为150℃,烘干时间为1-3min;第四梯度温度140℃, 烘杆时间1-3min。
所述步骤3中,碱减量处理为:将超细纤维基布经过浓度为0.5-10%的NaOH溶液,反应温度为90-100℃,反应时间为5-60min,得到超细纤维白胚基布。
所述步骤4中,染色处理具体为:将超细纤维白胚基布放入染料溶液中,当染料溶液温度直接升温到40-50℃时,开始进行以1-3℃/min的升温速率将染料溶液升温到130℃,并保温40min;然后以1-3℃的降温速率将染料溶液降温至70-90℃,即完成染色。
所述染料溶液中含分散染料金黄0.1-3%、红玉0.1-3%、灰0.1-3%。
所述步骤5中,酸性溶液中包含0.1-5g/L皂洗剂、1-5g/L还原剂、酸,该酸性溶液的PH值为4-5。
所述皂洗剂为平平加0或壬基酚聚氧乙烯醚Np10,所述还原剂为亚硫酸类还原剂,所述酸为冰醋酸、草酸或柠檬酸。
所述步骤5中,碱性溶液中包含0.5-5g/L碱和1-5g/L还原剂。
所述碱为烧碱或纯碱,所述还原剂为保险粉或二氧化硫脲。
采用上述方案后,具有以下有益效果:
一、本发明采用定岛涤纶超细纤维代替常规的定岛尼龙超细纤维,使得在进行染色处理时可以使用高牢度的分散染料而非色牢度较差的酸性染料;
二、超细纤维无纺布在进行含浸处理时,采用的是环保型分散染料染色专用的水性聚醚型聚氨酯,可以减少由于含浸的树脂可染性差或者染色牢度差带来的最终的色牢度不理性的问题;
三、由于采用的是定岛涤纶超细纤维,在经过高温分散染料染色过程中,染料分子除了一部分进入纤维内部外,较大的纤维比表面积吸附了部分分散染料分子,是色牢度较差的一重大原因,本发明采用酸性还原清洗结合碱性还原清洗的工艺,将没有进入纤维内部的染料分子破坏,达到提高日晒色牢度的目的,制备了一种高日晒色牢度的水性涤纶超纤绒面革。
具体实施方式
本发明揭示了一种高日晒色牢度的超细纤维绒面革的制备方法,其采用定岛涤纶超细纤维制得超纤无纺布,经过含浸处理、减量处理、染色处理后,进行酸性还原清洗、碱性还原清洗,从而制得具有较高的日晒色牢度的超细纤维绒面革。
本发明超细纤维绒面革的制备方法具体如下:
步骤1、制备超细纤维无纺布:将细度为3dtex(分特克斯)-6.5dtex×50mm、组分PET(涤纶)/COPET(改性涤纶)质量比例为90:10-50:50的定岛涤纶超细纤维进行开松、梳理、铺网、针刺,制成超细纤维无纺布。
梳理后的定岛涤纶超细纤维进行铺网后形成10-25层的纤维网,然后将纤维网输送到针刺机上,以15-35mm的针刺深度、150-400c/cm2(刺/平方厘米)的针刺密度进行针刺,记得到超细纤维无纺布。
步骤2、将超细纤维无纺布进行含浸处理:将水性聚氨酯溶液的固含量调整到5-40%、粘度调整到300-450cps,然后将超细纤维无纺布浸渍水性聚氨酯溶液,使超细纤维无纺布带液率为50-250%,然后经过连续的温度梯度进行烘干,烘箱第一梯度温度为80℃,烘干时间1-3min,烘箱第二梯度温度为120℃,烘干时间为1-3min,烘箱第三梯度温度为150℃,烘干时间为1-3min、烘箱第四梯度温度140℃ ,烘干时间1-3min,使聚氨酯在无纺布中具有微孔结构固化成膜,得到超细纤维基布。
步骤3、将超细纤维基布进行碱减量处理,在进行碱减量处理时,要求水性聚氨酯具有较高的耐碱性,同时由于除了“海”成分COPET易被氢氧化钠反应外,“岛”成分PET也易被氢氧化钠反应,所以碱减量处理工艺要求比较严格。
碱减量处理具体为:将超细纤维基布经过浓度为0.5-10%的NaOH溶液,反映温度为90-100℃,反应时间控制在5-60min,得到超细纤维白胚基布,超细纤维白胚基布的涤纶超细纤维的细度为0.05dtex-0.35detx。
步骤4、将超细纤维白胚基布进行染色处理:将超细纤维白胚基布放入染料溶液中,当染料溶液温度直接升温到40-50℃时,开始进行以1-3℃/min的升温速率升温到130℃后,保温40min,然后以1-3℃的降温速率将染料溶液降温至70-90℃,即完成染色。
其中,染料溶液中含分散染料金黄0.1-3%、红玉0.1-3%、灰0.1-3%,该分散染料采用Dianix(大爱尼克斯)ETD系列。
步骤5、进行酸性还原清洗和碱性还原清洗:染色完成后不进行排液,直接在降温后的染料溶液中加入酸性溶液进行酸性还原清洗,酸性溶液中包含0.1-5g/L皂洗剂、1-5g/L还原剂、酸,PH值为4-5,其中,皂洗剂为平平加0或壬基酚聚氧乙烯醚Np10,还原剂为亚硫酸类还原剂,酸为冰醋酸、草酸或柠檬酸,处理10-20min后,将染料溶液排掉,注入清水并将温度调整到50-70℃,然后加入碱性溶液进行碱性还原清洗。
碱性溶液中包含0.5-5g/L碱和1-5g/L还原剂,其中,碱为烧碱或纯碱,还原剂为保险粉或二氧化硫脲。碱性还原清洗10-20min后,排出废液,并用清水洗净至中性,得到超细纤维绒面革,将该超细纤维绒面革在120-140℃的温度下进行定型烘干,得到浅棕色涤纶超纤绒面革成品。
为详尽本发明内容以下将列举两个实施例进行详述。
实施例1
首先将70%PET/30%COPET双组份37岛定岛定岛涤纶超细纤维以次进行开松、梳理,然后铺网形成具有15层的纤维网,然后将该纤维网树洞到针刺机,以20mm的针刺深度、250c/cm2的针刺密度 对其进行针刺,制成350g/cm2、厚度为1.5mm的超细纤维无纺布。
然后将制得的超细纤维无纺布浸渍在固含为30%的水性聚氨酯溶液中,使超细纤维无纺布的带液率为150%,接着经过温度梯度进行烘干,温度梯度为:第一梯度温度为80℃,烘干时间2min,烘箱第二梯度温度为120℃,烘干时间为3min,烘箱第三梯度温度为150℃,烘干时间为2min、烘箱第四梯度温度140℃ 烘1min,得到超细纤维基布。
将超细纤维基布通过2%NaOH浓度95℃反应 20min制成超细纤维白坯基布。将超细纤维白胚基布放入染色缸的染料溶液中,该染料溶液中包含Dianix ETD系列的金黄1.5% 、Dianix ETD系列的红玉1%、Dianix ETD系列灰0.5%。染色工艺为:45℃开始升温,升温速率为1.5℃/min,升温到130℃保温30min,降温速率为2.5℃/min,降温到80℃,即完成染色。
染色完成后不排液直接加入酸性溶液进行酸性还原清洗,其中,酸性溶液含1g/L壬基酚聚氧乙烯醚Np10皂洗剂、3g/L亚硫酸类还原剂和冰醋酸,其PH值为4.5,酸性还原清洗的处理时间为15min,15min后将染废液排掉,注入清水调整温度到60℃。然后加入碱性还原清洗剂,该碱性还原清洗剂包含3g/L纯碱、4g/L二氧化硫脲还原剂,碱性还原清洗的处理时间为15min,15min后排废液,并用清水洗净至中性,得到超细纤维绒面革,将超细纤维绒面革出缸并在130℃的温度下定型烘干,得到浅棕色涤纶超纤绒面革成品,其日晒牢度为3.5级(5级制)。
实施例2
首先将70%PET/30%COPET双组份37岛定岛纤维以次进行开松、梳理,然后铺网形成具有15层的纤维网,然后将该纤维网树洞到针刺机,以20mm的针刺深度、250c/cm2的针刺密度对其进行针刺,制成350g/cm2、厚度为1.5mm的超细纤维无纺布。
然后将制得的超细纤维无纺布浸渍在固含为30%的水性聚氨酯溶液中,使超细纤维无纺布的带液率为150%,接着经过温度梯度进行烘干,温度梯度为:第一梯度温度为80℃,烘干时间2min,烘箱第二梯度温度为120℃,烘干时间为3min,烘箱第三梯度温度为150℃,烘干时间为2min、烘箱第四梯度温度140℃ 烘1min,得到超细纤维基布。
将超细纤维基布通过2%NaOH浓度95℃反应 20min制成超细纤维白坯基布。将超细纤维白胚基布放入染色缸的染料溶液中,该染料溶液中包含Dianix ETD系列的金黄1.5% 、Dianix ETD系列的红玉1%、Dianix ETD系列灰0.5%。染色工艺为:45℃开始升温,升温速率为1℃/min,升温到130℃保温40min,降温速率为2℃/min,降温到80℃,即完成染色。
染色完成后不排液直接加入酸性溶液进行酸性还原清洗,其中,酸性溶液含3g/L壬基酚聚氧乙烯醚Np10皂洗剂、3g/L亚硫酸类还原剂和冰醋酸,其PH值为4.5,酸性还原清洗的处理时间为15min,15min后将染废液排掉,注入清水调整温度到60℃。然后加入碱性还原清洗剂,该碱性还原清洗剂包含1.5g/L纯碱、2g/L二氧化硫脲还原剂,碱性还原清洗的处理时间为15min,15min后排废液,并用清水洗净至中性,得到超细纤维绒面革,将超细纤维绒面革出缸并在130℃的温度下定型烘干,得到浅棕色涤纶超纤绒面革成品,其日晒牢度为4级(5级制)。
以上所述,仅是本发明实施例而已,并非对本发明的技术范围作任何限制,故凡是依据本发明的技术实质对以上实施例所作的任何细微修改、等同变化与修饰,均仍属于本发明技术方案的范围内。
Claims (12)
1.一种高日晒色牢度的超细纤维绒面革的制备方法,其特征在于:所述制备方法包括:
步骤1、制备超细纤维无纺布;
将定岛涤纶超细纤维进行开松、梳理、铺网、针刺,制成超细纤维无纺布;
步骤2、将超细纤维无纺布进行含浸处理;
将超细纤维无纺布浸渍水性聚氨酯溶液,然后经过连续的温度梯度进行烘干,使聚氨酯在无纺布中具有微孔结构固化成膜,得到超细纤维基布;
步骤3、将超细纤维基布进行碱减量处理得到超细纤维白胚基布;
步骤4、将超细纤维白胚基布进行染色处理;
步骤5、进行酸性还原清洗和碱性还原清洗;
染色完成后,在染料溶液中加入酸性溶液进行酸性还原清洗,处理10-20min后,将染料溶液排掉,注入清水并将温度调整到50-70℃;然后加入碱性溶液进行碱性还原清洗,处理10-20min后,排出废液,并用清水洗净至中性,得到超细纤维绒面革,然后将该超细纤维绒面革在120-140℃的温度下进行定型烘干,得到超细纤维绒面革成品。
2.根据权利要求1所述的一种高日晒色牢度的超细纤维绒面革的制备方法,其特征在于:所述定岛涤纶超细纤的维细度为3dtex-6.5dtex×50mm,组分PET/COPET质量比例为90:10-50:50。
3.根据权利要求1所述的一种高日晒色牢度的超细纤维绒面革的制备方法,其特征在于:所述步骤1中,铺网时形成的铺网层数为10-25层;针刺时的针刺深度为15-35mm、针刺密度为150-400c/cm2。
4.根据权利要求1所述的一种高日晒色牢度的超细纤维绒面革的制备方法,其特征在于:所述步骤2中,将水性聚氨酯溶液的固含量为5-40%、粘度为300-450cps,超细纤维无纺布含浸处理后,其带液率为50-250%。
5.根据权利要求1所述的一种高日晒色牢度的超细纤维绒面革的制备方法,其特征在于:所述步骤2中,温度梯度为:第一梯度温度80℃,烘干时间1-3min;第二梯度温度120℃,烘干时间为1-3min;第三梯度温度为150℃,烘干时间为1-3min;第四梯度温度140℃, 烘杆时间1-3min。
6.根据权利要求1所述的一种高日晒色牢度的超细纤维绒面革的制备方法,其特征在于:所述步骤3中,碱减量处理为:将超细纤维基布经过浓度为0.5-10%的NaOH溶液,反应温度为90-100℃,反应时间为5-60min,得到超细纤维白胚基布。
7.根据权利要求1所述的一种高日晒色牢度的超细纤维绒面革的制备方法,其特征在于:所述步骤4中,染色处理具体为:将超细纤维白胚基布放入染料溶液中,当染料溶液温度直接升温到40-50℃时,开始进行以1-3℃/min的升温速率将染料溶液升温到130℃,并保温40min;然后以1-3℃的降温速率将染料溶液降温至70-90℃,即完成染色。
8.根据权利要求7所述的一种高日晒色牢度的超细纤维绒面革的制备方法,其特征在于:所述染料溶液中含分散染料金黄0.1-3%、红玉0.1-3%、灰0.1-3%。
9.根据权利要求1所述的一种高日晒色牢度的超细纤维绒面革的制备方法,其特征在于:所述步骤5中,酸性溶液中包含0.1-5g/L皂洗剂、1-5g/L还原剂、酸,该酸性溶液的PH值为4-5。
10.根据权利要求9所述的一种高日晒色牢度的超细纤维绒面革的制备方法,其特征在于:所述皂洗剂为平平加0或壬基酚聚氧乙烯醚Np10,所述还原剂为亚硫酸类还原剂,所述酸为冰醋酸、草酸或柠檬酸。
11.根据权利要求1所述的一种高日晒色牢度的超细纤维绒面革的制备方法,其特征在于:所述步骤5中,碱性溶液中包含0.5-5g/L碱和1-5g/L还原剂。
12.根据权利要求11所述的一种高日晒色牢度的超细纤维绒面革的制备方法,其特征在于:所述碱为烧碱或纯碱,所述还原剂为保险粉或二氧化硫脲。
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