CN110392753A - 皮革状片及纤维结构体 - Google Patents

皮革状片及纤维结构体 Download PDF

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CN110392753A
CN110392753A CN201880017331.2A CN201880017331A CN110392753A CN 110392753 A CN110392753 A CN 110392753A CN 201880017331 A CN201880017331 A CN 201880017331A CN 110392753 A CN110392753 A CN 110392753A
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fiber
leather
blue
shaped sheets
dyestuff
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CN110392753B (zh
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藤泽道宪
安藤哲也
菱田弘行
村手靖典
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Able Miracle Corp
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Abstract

本发明提供一种皮革状片或纤维结构体，所述皮革状片包含纤维结构体和被赋予至所述纤维结构体的内部空隙的高分子弹性体，所述纤维结构体包含用染料进行了染色的纤维，所述染料包含具有偶氮键的蓝色阳离子染料，所述皮革状片还包含具有阴离子性的多元酚衍生物。另外，本发明提供一种皮革状片，其包含纤维结构体或被赋予至所述该纤维结构体的内部空隙的高分子弹性体所述纤维结构体包含用染料进行了染色的纤维，所述染料包含具有偶氮键的蓝色阳离子染料，所述皮革状片在80℃、湿度90％、48小时的条件下进行了湿热处理时，湿热处理前后的色差(ΔE)为ΔE≤2。

Description

皮革状片及纤维结构体
技术领域
本发明涉及用具有偶氮键的蓝色阳离子染料进行了染色的皮革状片及纤维结构体。
现有技术文献
作为人造革等皮革状片中含有的纤维结构体，从耐热性、成型性优异的观点考虑，优选使用了聚酯纤维的无纺布。目前，作为用于对聚酯纤维进行染色的染料，从显色性优异的观点考虑，广泛使用了分散染料。但是，存在分散染料在热、压力、或溶剂的存在下容易转移的问题。为了解决这样的问题，尝试了用阳离子染料将赋予了对阳离子染料可染性的阳离子染料可染性聚酯纤维进行染色。
例如，下述专利文献1公开了一种用阳离子染料进行了染色的立毛状人造革，其包含具有0.07～0.9dtex的纤度的阳离子染料可染性聚酯纤维的无纺布及赋予至无纺布内部的高分子弹性体，该立毛状人造革的L*值≤50，载荷0.75kg/cm、50℃、16小时内对PVC的颜色转移性评价中，色差级数判定为4级以上，每1mm厚度的撕裂强度为30N以上，剥离强度为3kg/cm以上。
然而，在阳离子染料中，用蓝色阳离子染料进行了染色的阳离子染料可染性纤维的纤维结构体存在缺点。具体而言，蓝色阳离子染料难以显色出鲜艳的蓝色、耐光坚牢性低，难以兼顾显色出鲜艳的蓝色和高耐光坚牢性。另外，特别是如果不使纤度低的极细纤维大量浸染蓝色阳离子染料，则不显色为鲜艳的蓝色，在该情况下，存在容易褪色的问题。
作为蓝色阳离子染料，例如下述专利文献2中，作为用于对芳香族聚酰胺纤维进行染色的染料的一例，示例出了C.I.碱性蓝54作为偶氮类的蓝色染料。
另外，关于用阳离子染料进行了染色的纤维结构体，下述专利文献3中公开了一种用作为噻嗪类蓝色阳离子染料的C.I.碱性蓝9进行了染色、并用丹宁酸类化合物进行了处理的全芳香族聚酰胺纤维结构物。
现有技术文献
专利文献
专利文献1：国际公开2016/147671号小册子
专利文献2：日本特开2013-209776号公报
专利文献3：日本特开2009-74197号公报
发明内容
发明所要解决的课题
本发明人等已知，在蓝色阳离子染料中，如C.I.碱性蓝54那样具有偶氮键的蓝色阳离子染料是兼具鲜艳的蓝色显色性和耐光性的染料。然而，发现具有偶氮键的蓝色阳离子染料存在在高温多湿的环境下水解而变色，逐渐发红的问题。因此可以认为，例如在高温多湿的利用船进行的集装箱运输、仓库等长期保管的状况下，用包含具有偶氮键的蓝色阳离子染料的染料进行了染色的纤维会变色。因此发现，对于用包含具有偶氮键的蓝色阳离子染料的染料进行了染色的皮革状片、纤维结构体而言，虽然显色性和耐光性优异，但在实用上需要改进耐湿热变色性。
本发明的目的在于提供提高了耐湿热变色性的、用具有偶氮键的蓝色阳离子染料进行了染色的皮革状片或纤维结构体。
用于解决问题的方法
本发明的一个方面为一种皮革状片，其包含纤维结构体和被赋予至纤维结构体的内部空隙的高分子弹性体，所述纤维结构体包含用染料进行了染色的阳离子染料可染性纤维，所述染料包含C.I.碱性蓝54等具有偶氮键的蓝色阳离子染料，且所述皮革状片还包含具有阴离子性的多元酚衍生物。这样的用具有偶氮键的蓝色阳离子染料进行了染色的皮革状片的耐湿热变色性优异。
另外，作为具有偶氮键的蓝色阳离子染料，C.I.碱性蓝54的显色性特别优异，因此，从可以得到兼具鲜艳蓝色的显色性、耐光性、耐湿热变色性的皮革状片的观点考虑，是优选的。
另外，在形成纤维结构体的纤维为纤度0.05～1dtex的极细纤维的情况下，从本发明的效果变得特别显著的观点考虑，是优选的。在对纤维进行染色时，在使用了细的纤维的情况下，由于纤维的总表面积比使用了粗的纤维的情况更大，因此，如果不使其浸染更多的染料，就难以获得鲜艳的显色。然而，具有偶氮键的蓝色阳离子染料的浸染量多的情况下，在湿热条件下变得容易变色。因此，在以利用具有偶氮键的蓝色阳离子染料对细的纤维进行了染色的情况下，与对粗的纤维进行了染色的情况相比，在湿热条件下容易显著地变色。根据本发明，在利用具有偶氮键的蓝色阳离子染料对纤度0.05～1dtex的极细纤维进行了染色时，也显示出高耐湿热变色性。另外，作为纤维，从坚牢度、形态稳定性特别优异的观点考虑，优选为聚酯纤维。
另外，从耐湿热变色性特别优异的观点考虑，优选皮革状片在80℃、湿度90％、48小时的条件下进行了湿热处理时，湿热处理前后的色差(ΔE)为ΔE≤2。
另外，从本发明的效果变得特别显著的观点考虑，优选皮革状片具有在颜色坐标空间(L*a*b*颜色空间)中L*≤35的表面。
另外，皮革状片优选为表面进行了起毛处理的麂皮状人造革。
另外，本发明的另一方面为一种纤维结构体，其还包含用染料进行了染色的纤维和具有阴离子性的多元酚衍生物，所述染料包含具有偶氮键的蓝色阳离子染料。
另外，本发明的另一方面为一种皮革状片，其包含纤维结构体和被赋予至纤维结构体的内部空隙的高分子弹性体，所述纤维结构体包含用染料进行了染色的纤维，所述染料包含具有偶氮键的蓝色阳离子染料，且所述皮革状片在80℃、湿度90％、48小时的条件下进行了湿热处理时，湿热处理前后的色差(ΔE)为ΔE≤2。
另外，本发明的另一方面为一种纤维结构体，其包含用染料进行了染色的聚酯纤维，所述染料包含具有偶氮键的蓝色阳离子染料，所述纤维结构体在80℃、湿度90％、48小时的条件下湿热处理时，湿热处理前后的色差(ΔE)为ΔE≤2。
发明的效果
根据本发明，可以得到耐湿热变色性优异的、用具有偶氮键的蓝色阳离子染料进行了染色的皮革状片或纤维结构体。
具体实施方式
以下，对本发明的优选的实施方式进行具体说明。
作为本实施方式中使用的纤维结构体，可举出包含阳离子可染性纤维的无纺布、织物、编物等。其中，从能够显著地获得本发明效果的观点考虑，优选为无纺布，特别优选为极细纤维的无纺布。
作为阳离子染料可染性纤维，可举出具有对阳离子染料显示易染性或可染性的阴离子性基团的阳离子可染性聚酯纤维、聚酰胺纤维等。其中，在阳离子可染性聚酯纤维作为人造革使用时，从坚牢度、形态稳定性优异的观点考虑，特别优选。
作为阳离子可染性聚酯纤维的具体例子，可举出例如含有具有赋予阳离子可染性的阴离子性基团的单体成分作为共聚单元的聚酯纤维。作为用于赋予阳离子可染性的单体成分的具体例子，可举出例如：5-磺酸基间苯二甲酸的碱金属盐(锂盐、钠盐、钾盐、铷盐、铯盐)；间苯二甲酸-5-磺酸四丁基间苯二甲酸-5-磺酸乙基三丁基等间苯二甲酸-5-磺酸四烷基间苯二甲酸-5-磺酸四丁基铵、间苯二甲酸-5-磺酸乙基三丁基铵等间苯二甲酸-5-磺酸四烷基铵；3,5-二羧基苯磺酸四烷基盐等。这些成分可以单独使用，也可以组合使用2种以上。
阳离子染料可染性纤维的纤度没有特别限定，例如可以为超过1dtex的常规纤维，也可以为1dtex以下的极细纤维。从本发明的效果变得显著的观点考虑，从着色成深色时的耐湿热变色性的提高变得更显著的观点考虑，优选为0.05～1dtex，更优选为0.07～0.5dtex，特别优选为0.1～0.4dtex。在纤维细的情况下，如果不增加具有偶氮键的蓝色阳离子染料的浸染量，则难以充分获得蓝色的显色性，在染料的浸染量多的情况下，湿热环境中的颜色变化容易变得明显，因此本发明的效果特别显著。
另外，在不损害本发明的效果的范围内，阳离子染料可染性纤维也可以根据需要配合炭黑等着色剂、耐光剂、防霉剂等。
作为本实施方式的皮革状片，可举出将高分子弹性体含浸赋予至上述的纤维结构体的内部空隙而得到的人造革、合成皮革等。
作为被含浸赋予至纤维结构体的内部空隙的高分子弹性体的具体例子，可举出例如：聚氨酯、丙烯腈弹性体、烯烃弹性体、聚酯弹性体、聚酰胺弹性体、丙烯酸弹性体等。皮革状片中包含的高分子弹性体的比例没有特别限定，优选为1～50质量％，更优选为5～30质量％左右。另外，皮革状片优选为麂皮状、牛巴戈状的立毛状皮革状片，该立毛状皮革状片包含其表面的纤维通过抛光处理等起毛处理而进行了立毛的纤维。
本实施方式的包含阳离子染料可染性纤维的皮革状片或纤维结构体用包含具有偶氮键的蓝色阳离子染料的染料进行染色。具有偶氮键的蓝色阳离子染料的蓝色显色性和耐光性优异。
作为具有偶氮键的蓝色阳离子染料的具体例子，可举出例如C.I.碱性蓝54、C.I.碱性蓝159等。需要说明的是，本实施方式中的蓝色阳离子染料是指在颜料索引号(C.I.)中包含“碱性蓝”的蓝色阳离子染料。其中，从鲜艳的蓝色的显色性优异的观点考虑，特别优选为C.I.碱性蓝54。
在对本实施方式的皮革状片或纤维结构体进行染色的染料中，除了具有偶氮键的蓝色阳离子染料以外，还可以组合并配合其它染料。作为除具有偶氮键的蓝色阳离子染料以外的阳离子染料，可举出例如：C.I.碱性蓝3、C.I.碱性蓝6、C.I.碱性蓝10、C.I.碱性蓝12、C.I.碱性蓝75、C.I.碱性蓝96等嗪类蓝色阳离子染料；C.I.碱性蓝9等噻嗪类蓝色阳离子染料；C.I.碱性黄40等香豆素类染料、C.I.碱性黄21等次甲基类染料、C.I.碱性黄28等偶氮甲碱类染料、作为偶氮类红色染料的C.I.碱性红29或C.I.碱性红46、作为吨类染料的C.I.碱性紫11等。
染色方法没有特别限定，可举出例如使用液流染色机、经轴染色机、卷染机等染色机进行染色的方法。作为染色加工的条件，可以在高压下进行染色，但由于本实施方式的纤维结构体可以在常压下染色，因此从环境负担小、可以降低染色成本的观点考虑，优选在常压下进行染色。在常压下进行染色时，作为染色温度，优选为60～100℃，更优选为80～100℃。另外，在染色时，也可以使用乙酸、芒硝这样的染色助剂。
在使用阳离子染料进行染色时，染料液中的阳离子染料的浓度取决于阳离子染料可染性纤维的纤度，但从显色性与染料的耐转移性的平衡优异的观点考虑，优选相对于阳离子染料可染性纤维为0.5～20％owf、进一步优选为1.0～15％owf。在纤维中浸染的阳离子染料的浓度过高时，未固定于染色位点而浸染的阳离子染料的量增多，存在染料容易转移的倾向。另外，在染料中被浸染的阳离子染料的浓度过低时，存在难以显色成深色的倾向。
另外，在本实施方式中，优选通过在含有阴离子型表面活性剂的热水浴中对用阳离子染料进行了染色的皮革状片或纤维结构体进行清洗处理，从而去除键合力低的阳离子染料。通过这样的清洗处理，键合力低的阳离子染料被充分地除去，不容易从染色后的皮革状片、纤维结构体移染至其它物品。作为阴离子型表面活性剂的具体例子，可以列举例如：日成化成株式会社制造的SORUJIN(ソルジン)R、SENKA公司制造的SENKANOL A-900、明成化学工业株式会社制造的Meisanol KHM等。
在含有阴离子型表面活性剂的热水浴中的清洗处理优选在50～100℃、更优选为60～80℃的热水浴中进行。另外，作为清洗时间，优选为10～30分钟左右，更优选为15～20分钟左右。另外，可以重复进行该清洗1次以上、优选进行2次以上。
通过对用包含具有偶氮键的蓝色阳离子染料的染料进行了染色的皮革状片或纤维结构体赋予具有阴离子性的多元酚衍生物，能够提高耐湿热变色性。作为这样的具有阴离子性的多元酚衍生物，可举出作为用酸性染料进行了染色的尼龙纤维的湿润坚牢度提高剂使用的具有磺酸基等阴离子性基团的多元酚衍生物，更具体而言，可举出作为芳香族衍生物磺化物的福尔马林缩合物的明成化学工业株式会社制造的Dimafix。皮革状片或纤维结构体的具有阴离子性的多元酚衍生物的含量没有特别限定，从充分改善耐湿热变色性的观点考虑，优选相对于染料附着量为70～200％左右。
另外，在皮革状片或纤维结构体中也可以根据需要配合耐光剂。作为耐光剂的具体例子，可举出：苯并三唑类耐光剂、三嗪类耐光剂、二苯甲酮类耐光剂等。这些化合物可以单独使用，也可以组合使用2种以上。
对于本实施方式的用包含具有偶氮键的蓝色阳离子染料的染料进行了染色的皮革状片或纤维结构体而言，从本发明的效果变得特别显著的观点考虑，优选染色成深色，具体而言，作为L*a*b*表色系统中的L*值，优选为L*≤35，更优选为L*≤30。
由此，得到本实施方式的用包含具有偶氮键的蓝色阳离子染料的阳离子染料进行了染色的皮革状片或纤维结构体。本实施方式的皮革状片或纤维结构体例如在80℃、湿度90％、48小时的条件下进行了湿热处理时，优选具有色差(ΔE)为ΔE≤2、更优选为ΔE≤1.4、特别优选为ΔE≤1的高耐湿热变色性。特别是在使用了纤度0.05～1dtex的极细纤维的纤维结构体的情况下，在80℃、湿度90％、48小时的条件下进行了湿热处理时，优选具有色差(ΔE)为ΔE≤2、更优选为ΔE≤1.4、特别优选为ΔE≤1的高耐湿热变色性。
实施例
以下，通过实施例对本发明更具体地进行说明。需要说明的是，本发明的范围并不受实施例的任何限定。首先，将实施例中使用的各种染料示于以下。
(染料)
·C.I.碱性蓝54：Nichilon Blue-GL(具有偶氮键的蓝色阳离子染料)(日成化成株式会社制造)
·C.I.碱性蓝159：Nichilon Blue-AZN(具有偶氮键的蓝色阳离子染料)(日成化成株式会社制造)
·C.I.碱性蓝3：Nichilon Blue-7G(嗪类蓝色阳离子染料)(日成化成株式会社制造)
·C.I.碱性蓝75：Nichilon Blue-350(嗪类蓝色阳离子染料)(日成化成株式会社制造)
·C.I.碱性黄28：Nichilon Golden Yellow-GL(偶氮甲碱类黄色阳离子染料)(日成化成株式会社制造)
·C.I.碱性红29：Nichilon Red-GL(偶氮类红色阳离子染料)(日成化成株式会社制造)
实施例1
将自乳化型水性聚氨酯树脂含浸于以阳离子染料可染性聚酯纤维作为岛成分且以水溶性聚乙烯醇作为海成分的海岛型复合纤维的无纺布，然后提取海成分，由此得到了人造革本色布，其包含平均纤度0.2dtex的阳离子染料可染性聚酯纤维的无纺布，且聚氨酯比率为10质量％。然后，将人造革本色布切片，对表面进行抛光处理，由此加工成厚度0.78mm、表观密度0.49g/cm3。
然后，如表1所示，用包含Nichilon Blue-GL 4％owf、Nichilon Go1den Yellow-GL 2％owf、Nichilon Red-GL 2％owf的染料液在120℃×40分钟的条件下对人造革本色布进行染色。然后，通过使用2g/L的SORUJIN R溶液在70℃×20分钟的条件下进行2次皂洗，得到了被着色成深藏蓝色的人造革。
然后，在浴比1∶20、80℃×30分钟的条件下对进行了染色的人造革赋予具有阴离子性的多元酚衍生物(明成化学工业株式会社制造：Dimafix ESH、芳香族衍生物磺化物的福尔马林缩合物)6％owf，并进行干燥。由此，得到赋予了具有阴离子性的多元酚衍生物的麂皮状人造革。
然后，如下所述评价了麂皮状人造革的颜色坐标、耐湿热变色性及耐光性。
(颜色坐标)
使用分光光度计(美能达公司制造：CM-3700)对麂皮状人造革的麂皮状表面的L*a*b*表色系统的坐标值进行了测色。值以从整个试验片选择平均的位置进行测定而得到的3点的平均值进行计算。
(耐湿热变色性)
将麂皮状人造革进行在80℃×90％的湿热条件下放置48小时的处理后，进行风干。然后，对湿热处理后的麂皮状表面的颜色坐标进行测色。然后，求出了麂皮状表面在湿热处理前的颜色坐标与湿热处理后的颜色坐标的色差ΔE及Δa*、Δb*、ΔL*。
(耐光性)
使用Q-PANEL公司制造的加速耐光试验机QUV/se(45℃、照度0.78W/m2)对麂皮状人造革进行了24小时UV照射。然后，测定了24小时UV照射后的麂皮状表面的颜色坐标。然后，使用Datacolor公司制造的型号600以G37UV Color Change模式对24小时UV照射前后的麂皮状表面的褪色进行了级数判定。
将结果示于下述表1。
实施例2
在实施例1中，赋予了12％owf的阴离子性多元酚衍生物来代替赋予6％owf，除此以外，同样地得到麂皮状人造革，并进行了评价。将结果示于表1。
实施例3
在实施例1中，赋予了3％owf的阴离子性的多元酚衍生物来代替赋予6％owf，除此以外，同样地得到麂皮状人造革，并进行了评价。将结果示于表1。
实施例4
如表1所示，用仅包含Nichilon Blue-GL 4％owf的染料液染色成皇室蓝色，除此以外，与实施例1同样地得到麂皮状人造革，并进行了评价。将结果示于表1。
实施例5
如表1所示，用仅包含Nichilon Blue-AZN 4％owf的染料液染色成带黄色的蓝色，除此以外，与实施例1同样地得到麂皮状人造革，并进行了评价。将结果示于表1。
比较例1
在实施例1中，省略了赋予阴离子性多元酚衍生物的工序，除此以外，同样地得到麂皮状人造革，并进行了评价。将结果示于表1。
比较例2
在实施例4中，省略了赋予阴离子性多元酚衍生物的工序，除此以外，同样地得到麂皮状人造革，并进行了评价。将结果示于表1。
比较例3
在实施例5中，省略了赋予阴离子性多元酚衍生物的工序，除此以外，同样地得到麂皮状人造革，并进行了评价。将结果示于表1。
比较例4
如表1所示，用包含Nichilon Blue-7G 4％owf的染料液进行染色，进而省略了赋予阴离子性多元酚衍生物的工序，除此以外，与实施例1同样地得到麂皮状人造革，并进行了评价。将结果示于表1。
比较例5
如表1所示，用包含Nichilon Blue-350 4％owf的染料液进行染色，进而省略了赋予阴离子性多元酚衍生物的工序，除此以外，与实施例1同样地得到麂皮状人造革，并进行了评价。将结果示于表1。
参照表1，对于用包含C.I.碱性蓝54的染料染色成深藏蓝色的人造革而言，所述C.I.碱性蓝54是具有偶氮键的蓝色阳离子染料，赋予了具有阴离子性的多元酚衍生物的实施例1～3的人造革在湿热处理后的色差ΔE为0.8～1.4，与未赋予具有阴离子性的多元酚衍生物的比较例1的人造革在湿热处理后的色差ΔE＝2.9相比，耐湿热变色性显著较高。同样地，对于用包含C.I.碱性蓝54的染料染色成皇室蓝色的人造革而言，赋予了具有阴离子性的多元酚衍生物的实施例4的人造革在湿热处理后的色差ΔE为0.8，与未赋予具有阴离子性的多元酚衍生物的比较例2的人造革在湿热处理后的色差ΔE＝1.5相比，耐湿热变色性显著较高。
另外，对于用包含C.I.碱性蓝159的染料染色成L*＝37的带黄色的蓝色的人造革而言，所述C.I.碱性蓝159是具有偶氮键的蓝色阳离子染料，赋予了具有阴离子性的多元酚衍生物的实施例5的人造革在湿热处理后的色差ΔE为0.5，与未赋予具有阴离子性的多元酚衍生物的比较例3的人造革在湿热处理后的色差ΔE＝0.8相比，耐湿热变色性较高。
另外，用包含作为嗪类蓝色阳离子染料的C.I.碱性蓝3的染料染色成L*＝37的翡翠绿色的比较例4的人造革的耐光性低。另外，用包含C.I.碱性蓝75的染料染色成L*＝52的绿松石蓝色的比较例5的人造革没有显色出深色的蓝色。

Claims (13)

1.一种皮革状片，其包含纤维结构体和被赋予至所述纤维结构体的内部空隙的高分子弹性体，所述纤维结构体包含用染料进行了染色的纤维，所述染料包含具有偶氮键的蓝色阳离子染料，
所述皮革状片还包含具有阴离子性的多元酚衍生物。
2.根据权利要求1所述的皮革状片，其中，所述具有偶氮键的蓝色阳离子染料包含C.I.碱性蓝54。
3.根据权利要求1或2所述的皮革状片，其中，所述纤维的纤度为0.05～1dtex。
4.根据权利要求1～3中任一项所述的皮革状片，其中，所述纤维为聚酯纤维。
5.根据权利要求1～4中任一项所述的皮革状片，其在80℃、湿度90％、48小时的条件下进行了湿热处理时，湿热处理前后的色差(ΔE)为ΔE≤2。
6.根据权利要求1～5中任一项所述的皮革状片，其具有在颜色坐标空间(L*a*b*颜色空间)中L*≤35的表面。
7.根据权利要求1～6中任一项所述的皮革状片，其是表面进行了起毛处理的麂皮状人造革。
8.一种皮革状片，其包含纤维结构体和被赋予至所述纤维结构体的内部空隙的高分子弹性体，所述纤维结构体包含用染料进行了染色的纤维，所述染料包含具有偶氮键的蓝色阳离子染料，
所述皮革状片在80℃、湿度90％、48小时的条件下进行了湿热处理时，湿热处理前后的色差(ΔE)为ΔE≤2。
9.一种纤维结构体，其包含用染料进行了染色的纤维和具有阴离子性的多元酚衍生物，所述染料包含具有偶氮键的蓝色阳离子染料。
10.根据权利要求9所述的纤维结构体，其中，所述具有偶氮键的蓝色阳离子染料包含C.I.碱性蓝54。
11.根据权利要求9或10所述的纤维结构体，其中，所述纤维是具有0.05～1dtex的纤度的聚酯纤维。
12.根据权利要求9～11中任一项所述的纤维结构体，其具有在80℃、湿度90％的条件下进行了48小时的湿热处理时色差(ΔE)为ΔE≤2的表面。
13.一种纤维结构体，其包含用染料进行了染色的聚酯纤维，所述染料包含具有偶氮键的蓝色阳离子染料，
所述纤维结构体在80℃、湿度90％、48小时的条件下进行了湿热处理时，湿热处理前后的色差(ΔE)为ΔE≤2。
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