CN108360187B - 一种涤纶型超细纤维合成革的染色方法 - Google Patents
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Abstract
一种涤纶型超细纤维合成革的染色方法。使用分散染料将聚酯为岛、改性聚酯为海的海岛型超细纤维无纺布染色,然后将染色的无纺布浸渍水性聚氨酯树脂,将其烘干凝固后在碱液中进行减量开纤,减量后的超纤基布水洗至中性后,再使用酸性染料进行染色,将染色后的超纤基布水洗、固色、烘干后制得涤纶型超细纤维染色合成革。本方法先使用分散染料针对涤纶纤维进行染色,再使用酸性染料针对聚氨酯染色,可有效的提高染色型涤纶超细纤维合成革的干擦、湿擦、迁移等色牢度,提高其产品品质。
Description
技术领域
本发明设计合成革领域,特别是指一种涤纶型超细纤维合成革的染色方法。
背景技术
超细纤维合成革是基于溶离海岛型超细纤维发展起来的一种复合材料,由超细纤维和聚氨酯两部分构成:超细纤维三维交联在一起,起到骨架和支撑作用,分布在纤维四周的聚氨酯起到填充作用,形成类似于真皮胶原纤维的结构。超细纤维合成革制备方法是将超细纤维经无纺加工成布,再浸渍聚氨酯、凝固、减量开纤去除海组分,获得类似真皮胶原纤维三股螺旋结构的超细纤维革基布,最后经染色、印刷、压花等后续加工,制得高仿真皮革制品,按其减量方式可分为甲苯减量和碱减量型超细纤维合成革。
目前,碱减量型超细纤维合成革的常见染色方法是将无纺布浸渍聚氨酯树脂,凝固后在碱液中进行减量开纤,将减量后的超纤基布水洗至中性后,再使用染料进行染色,将染色后的超纤基布水洗、固色、烘干后制得超细纤维染色合成革。
但碱减量型超纤革又分为锦纶型和涤纶(聚酯)型。锦纶型超纤革在染色时可以使用酸性染料(含金属络合染料)进行染色,酸性染料可以同时对锦纶纤维和聚氨酯同时上染,并且有很好的色牢度。涤纶型超纤革中同时含有聚酯和聚氨酯,由于聚酯是一种完全没有亲水性的有机合成纤维,因此,传统的直接、酸性、活性等水溶性染料无法被吸附到这种疏水性纤维上去,也就无法染色;而分散染料是一种没有水溶性基团的小分子染料,与疏水性的涤纶有较好的亲和力,而且分子小,可以在涤纶纤维受到高温影响下发生膨胀的情况下,趁机“钻”进涤纶纤维的缝隙中,因此,需要采用分散染料对涤纶染色;但分散染料与聚氨酯之间没有强的结合力,所以色牢度差,即分散染料不适合聚氨酯染色。因此若单独使用分散染料或酸性染料对涤纶型超细纤维合成革进行染色时,涤纶和聚氨酯势必有一种不能上染,匀染性差,并造成色牢度差;若同时使用分散染料和酸性染料进行染色时,聚氨酯将吸附分散染料而造成色牢度差。
发明内容
本发明的主要目的在于克服现有涤纶超细纤维合成革染色方法的缺点,提供一种提高涤纶型超细纤维合成革色牢度的染色方法。先使用分散染料针对涤纶纤维无纺布进行染色,再使用酸性染料针对聚氨酯染色,可有效提高染色型涤纶超细纤维合成革的耐干擦、湿擦、迁移等色牢度,提高产品品质。
本发明采用如下技术方案:
将涤纶型超细纤维合成革中的超细纤维和聚氨酯分别染色,避免适用于涤纶型超细纤维的分散染料与聚氨酯的不牢固结合,提高超细纤维合成革成品的色牢度,具体染色步骤如下:
a.无纺布染色:将聚酯为岛、改性聚酯为海的海岛型超细纤维无纺布在分散染料浓度为无纺布重的0.5-7%、浴比1:12-1:20的条件下染色,染色温度为以3℃/min的速度升温至80℃,保温5-10分钟,然后以2℃/min的速度升温至100℃,保温5-10分钟,再以1℃/min的速度升温至120℃,保温5-10分钟,最后以0.5℃/min的速度升温至135-140℃,保温染色20-40分钟,染色后降温至60-70℃,将无纺布榨液至无纺布含液率为70-150%;
b.浸渍:染色超细纤维无纺布浸渍脂肪族、耐碱水解型水性聚氨酯树脂,浸渍树脂量以干重计为无纺布质量的40-60%;
c.烘干固化:将浸渍后的无纺布,在100-110℃的条件下烘干使聚氨酯树脂凝固;
d.减量开纤:将烘干后的含浸无纺布在NaOH水溶液中在90-100℃的条件下减量开纤;
e.水洗及干燥定形:减量后基布水洗至中性,并在100-110℃的条件下烘干,制得超细纤维合成革基布;
f.超细纤维合成革基布染色:将制得的超细纤维合成革基布在酸性染料浓度为无纺布重的0.5-6%、浴比1:12-1:20的条件下染色,染色温度为以3℃/min的速度升温至80℃,保温5-10分钟,然后以1℃/min的速度升温至90℃,保温5-10分钟,再以0.5℃/min的速度升温至95-100℃,保温染色20-40分钟,染色后降温至70℃,将染色超细纤维合成革基布榨液后在浴比1:12-1:20,温度70-80℃的条件下皂洗1-2次,每次20-30分钟,然后在浴比1:12-1:20,温度70-80℃的条件下水洗1-2次,每次20-30分钟,最后在浴比1:12-1:20,温度30-40℃的条件下水洗1-2次,每次20-30分钟;
g.固色及干燥定型:经可选的固色工艺固色后,干燥定型,制得涤纶型超细纤维染色合成革。
浴比是指被染物与染料溶液的重量之比。
聚酯为岛、改性聚酯为海的海岛型超细纤维,为聚酯:改性聚酯重量计为(80-60):(20-40),海岛纤维岛的个数为37-128岛。
所述酸性染料为酸性染料或金属络合染料。
由上述对本发明的描述可知,与现有的染色方法相比,本发明具有如下有益效果:
1.本发明分别针对涤纶型超细纤维合成革中的涤纶纤维、聚氨酯染色,避免适用于涤纶型超细纤维染色的分散染料与聚氨酯的不牢固结合,减少分散染料附着在聚氨酯上的损失,有效提高了超细纤维合成革耐干擦、湿擦、迁移等色牢度,提高其产品品质。
2.本发明对涤纶型超细纤维合成革中的超细纤维和聚氨酯分别染色,可高提产品的匀染性。
3.本发明先在高温条件下使用分散染料对涤纶纤维进行染色,然后在相对低温条件下进行浸渍、凝固、减量、对聚氨酯染色,低温条件的温度不超过分散染料上染涤纶纤维的温度,已经上染于涤纶纤维的分散染料不会损失。
具体实施方式
下面通过实施例对本发明进行具体描述,有必要在此指出的是以下实施例只是用于对本发明进行进一步的说明,不能理解为对本发明保护范围的限制,该领域的技术熟练人员可以根据上述本发明的内容做出一些非本质的改进和调整,仍属于本发明的保护范围。
实施例一:
将聚酯:改性聚酯=60:40的聚酯为岛,岛数为37个的海岛型超细纤维无纺布,在藏青色分散染料浓度为无纺布重的3%、浴比1:20的条件下染色,染色温度为以3℃/min的速度升温至80℃,保温5分钟,然后以2℃/min的速度升温至100℃,保温10分钟,再以1℃/min的速度升温至120℃,保温10分钟,最后以0.5℃/min的速度升温至135℃,保温染色20分钟,染色后降温至70℃,将无纺布榨液至无纺布含液率为120%;
染色超细纤维无纺布浸渍脂肪族、耐碱水解型水性聚氨酯树脂,浸渍树脂量以干重计为无纺布质量的50%;
将浸渍后的无纺布,在110℃的条件下烘干使聚氨酯树脂凝固;
将烘干后的含浸无纺布在NaOH水溶液中在95℃的条件下减量开纤;
将减量后基布水洗至中性,并在110℃的条件下烘干;
将制得的超细纤维合成革基布在藏青色酸性染料浓度为无纺布重的2%、浴比1:20的条件下染色,染色温度为以3℃/min的速度升温至80℃,保温5分钟,然后以1℃/min的速度升温至90℃,保温10分钟,再以0.5℃/min的速度升温至99℃,保温染色30分钟,染色后降温至70℃,将染色超细纤维合成革基布榨液后在浴比1:20,温度80℃的条件下皂洗2次,每次20分钟,然后在浴比1:20,温度80℃的条件下水洗2次,每次20分钟,最后在浴比1:20,温度40℃的条件下水洗2次,每次20分钟;
将染色基布干燥定型,制得涤纶型超细纤维染色合成革。
制得涤纶型超细纤维染色合成革的干擦色牢度为4级、湿擦色牢度为3-4级、色迁移为4级;使用分散染料和酸性染料共同对减量后基布染色的合成革干擦色牢度为3-4级、湿擦色牢度为3级、色迁移为3-4级。
实施例二:
将聚酯:改性聚酯=70:30的聚酯为岛,岛数为37个的海岛型超细纤维无纺布,在红色分散染料浓度为无纺布重的2%、浴比1:15的条件下染色,染色温度为以3℃/min的速度升温至80℃,保温5分钟,然后以2℃/min的速度升温至100℃,保温5分钟,再以1℃/min的速度升温至120℃,保温10分钟,最后以0.5℃/min的速度升温至140℃,保温染色20分钟,染色后降温至65℃,将无纺布榨液至无纺布含液率为100%;
染色超细纤维无纺布浸渍脂肪族、耐碱水解型水性聚氨酯树脂,浸渍树脂量以干重计为无纺布质量的45%;
将浸渍后的无纺布,在105℃的条件下烘干使聚氨酯树脂凝固;
将烘干后的含浸无纺布在NaOH水溶液中在90℃的条件下减量开纤;
将减量后基布水洗至中性,并在110℃的条件下烘干;
将制得的超细纤维合成革基布在红色金属络合染料浓度为无纺布重的3%、浴比1:15的条件下染色,染色温度为以3℃/min的速度升温至80℃,保温5分钟,然后以1℃/min的速度升温至90℃,保温5分钟,再以0.5℃/min的速度升温至98℃,保温染色40分钟,染色后降温至70℃,将染色超细纤维合成革基布榨液后在浴比1:15,温度70-80℃的条件下皂洗1次,每次20分钟,然后在浴比1:15,温度70℃的条件下水洗2次,每次20分钟,最后在浴比1:15,温度40℃的条件下水洗2次,每次20分钟;
经固色工艺固色后,干燥定型,制得涤纶型超细纤维染色合成革。
制得涤纶型超细纤维染色合成革的干擦色牢度为5级、湿擦色牢度为5级、色迁移为4-5级;使用分散染料和酸性染料共同对减量后基布染色的合成革干擦色牢度为4级、湿擦色牢度为4级、色迁移为3-4级。
实施例三:
将聚酯:改性聚酯=60:40的聚酯为岛,岛数为37个的海岛型超细纤维无纺布,在棕色分散染料浓度为无纺布重的5%、浴比1:20的条件下染色,染色温度为以3℃/min的速度升温至80℃,保温5分钟,然后以2℃/min的速度升温至100℃,保温5分钟,再以1℃/min的速度升温至120℃,保温10分钟,最后以0.5℃/min的速度升温至133℃,保温染色30分钟,染色后降温至70℃,将无纺布榨液至无纺布含液率为130%;
染色超细纤维无纺布浸渍脂肪族、耐碱水解型水性聚氨酯树脂,浸渍树脂量以干重计为无纺布质量的45%;
将浸渍后的无纺布,在110℃的条件下烘干使聚氨酯树脂凝固;
将烘干后的含浸无纺布在NaOH水溶液中在93℃的条件下减量开纤;
将减量后基布水洗至中性,并在110℃的条件下烘干;
将制得的超细纤维合成革基布在棕色酸性染料浓度为无纺布重的5%、浴比1:20的条件下染色,染色温度为以3℃/min的速度升温至80℃,保温5分钟,然后以1℃/min的速度升温至90℃,保温5分钟,再以0.5℃/min的速度升温至99℃,保温染色30分钟,染色后降温至70℃,将染色超细纤维合成革基布榨液后在浴比1:20,温度80℃的条件下皂洗1次,每次30分钟,然后在浴比1:20,温度80℃的条件下水洗2次,每次20分钟,最后在浴比1:20,温度40℃的条件下水洗2次,每次20分钟;
将染色基布干燥定型,制得涤纶型超细纤维染色合成革。
制得涤纶型超细纤维染色合成革的干擦色牢度为4级、湿擦色牢度为3-4级、色迁移为4级;使用分散染料和酸性染料共同对减量后基布染色的合成革干擦色牢度为3级、湿擦色牢度为2-3级、色迁移为3级。
Claims (3)
1.一种涤纶型超细纤维合成革的染色方法,其特征在于:将涤纶型超细纤维合成革中的超细纤维和聚氨酯分别染色,避免适用于涤纶型超细纤维的分散染料与聚氨酯的不牢固结合,提高超细纤维合成革成品的色牢度,具体染色步骤如下:
a.无纺布染色:将聚酯为岛、改性聚酯为海的海岛型超细纤维无纺布在分散染料浓度为无纺布重的0.5-7%、浴比1:12-1:20的条件下染色,染色温度为以3℃/min的速度升温至80℃,保温5-10分钟,然后以2℃/min的速度升温至100℃,保温5-10分钟,再以1℃/min的速度升温至120℃,保温5-10分钟,最后以0.5℃/min的速度升温至135-140℃,保温染色20-40分钟,染色后降温至60-70℃,将无纺布榨液至无纺布含液率为70-150%;
b.浸渍:染色超细纤维无纺布浸渍脂肪族、耐碱水解型水性聚氨酯树脂,浸渍树脂量以干重计为无纺布质量的40-60%;
c.烘干固化:将浸渍后的无纺布,在100-110℃的条件下烘干使聚氨酯树脂凝固;
d.减量开纤:将烘干后的含浸无纺布在NaOH水溶液中在90-100℃的条件下减量开纤;
e.水洗及干燥定形:减量后基布水洗至中性,并在100-110℃的条件下烘干,制得超细纤维合成革基布;
f.超细纤维合成革基布染色:将制得的超细纤维合成革基布在酸性染料浓度为无纺布重的0.5-6%、浴比1:12-1:20的条件下染色,染色温度为以3℃/min的速度升温至80℃,保温5-10分钟,然后以1℃/min的速度升温至90℃,保温5-10分钟,再以0.5℃/min的速度升温至95-100℃,保温染色20-40分钟,染色后降温至70℃,将染色超细纤维合成革基布榨液后在浴比1:12-1:20,温度70-80℃的条件下皂洗1-2次,每次20-30分钟,然后在浴比1:12-1:20,温度70-80℃的条件下水洗1-2次,每次20-30分钟,最后在浴比1:12-1:20,温度30-40℃的条件下水洗1-2次,每次20-30分钟;
g.固色及干燥定型:经可选的固色工艺固色后,干燥定型,制得涤纶型超细纤维染色合成革。
2.如权利要求1所述的一种涤纶型超细纤维合成革的染色方法,其特征在于:所述聚酯为岛、改性聚酯为海的海岛型超细纤维,为聚酯:改性聚酯重量计为(80-60):(20-40),海岛纤维岛的个数为37-128岛。
3.如权利要求1所述的一种涤纶型超细纤维合成革的染色方法,其特征在于:所述酸性染料为酸性染料或金属络合染料。
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