CN103890262B - 微纤维产品及其制备覆盖物和外壳的用途 - Google Patents

微纤维产品及其制备覆盖物和外壳的用途 Download PDF

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CN103890262B
CN103890262B CN201380003329.7A CN201380003329A CN103890262B CN 103890262 B CN103890262 B CN 103890262B CN 201380003329 A CN201380003329 A CN 201380003329A CN 103890262 B CN103890262 B CN 103890262B
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covering
felt
product
microfiber
adhesive
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G·贝洛尼
C·C·阿米拉蒂
G·阿蒂诺
F·帕尼逖
W·卡蒂纳利
G·罗曼尼
C·科斯塔
M·坎瑟茨
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    • D04H1/46Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
    • D04H1/48Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres in combination with at least one other method of consolidation
    • D04H1/49Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres in combination with at least one other method of consolidation entanglement by fluid jet in combination with another consolidation means
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Abstract

本发明涉及在聚氨酯基体内浸渍的基于聚酯或聚酰胺微纤维的微纤维非织造织物的制备方法,它的厚度等于或小于0.65mm,具有平坦或轻微杂色的外观,且绒毛长度小于350μm。该非织造织物用于制备生活消费品的覆盖物,尤其制备电子产品的覆盖物和外壳。

Description

微纤维产品及其制备覆盖物和外壳的用途
本发明的目的是用于制备生活消费品的覆盖物(cover),优选制备生活消费品,尤其电子产品的覆盖物和外壳使用的具有山羊皮状外观,减少的厚度和平坦或轻微杂色外观的微纤维非织造织物。生活消费品的实例包括:记录或再现声音或图像的便携式器件,便携式娱乐器件,运动装备或设备,个人福利或健康用器件,电话,手持式计算机,膝上型电脑,和其他电子器件。
本发明还涉及获得这种非织造织物的方法和可通过这种非织造织物获得的覆盖物。
在具有天然皮革外观的复合材料内的非织造织物是本领域已知的,但涉及手感,轻便,绒毛和耐光性的特征优于天然皮革。
由聚合物微纤维,优选聚酯或聚酰胺微纤维为起始,通过称为“海岛”的纺丝技术,获得这种非织造织物。
将连续长丝的双组分束挤出通过喷丝头开始操作。每一单独的长丝本身含有许多和非常薄的聚酯或聚酰胺微长丝,优选16根长丝。微长丝(岛)如此薄且难以操作,以至于要求存在鞘(海)作为载体。聚合物聚苯乙烯(PS)用作海组分。
如此生产的纤维形成单一的带(丝束)并经历熨烫,卷边和切割工艺,直到获得短纤维(短绒),然后成捆收集用于由转变成毡组成的随后的工艺。
通过梳理工艺,短绒转变成多次交叠的材料的薄片(卡的面纱),直到形成空气垫(许多面纱的交叠)。
纤维粘结到彼此上要求复杂的针刺工艺,所述针刺工艺通过含机械交织纤维的特殊针的一系列板进行。
用粘合剂,优选聚乙烯基粘合剂浸渍如此获得的毡,其目的是在溶解海组分之前,保护微纤维。构成微纤维鞘的海组分随后采用选择性溶剂,优选三氯乙烯溶解。
接着由用在溶剂(二甲基甲酰胺)内的聚氨酯粘合剂浸渍组成的步骤。
最后,聚氨酯凝结,且与此同时,粘合剂溶解。
连续交叉切割如此获得的中间体产物(分离),从而由单一的卷生成两个相同的部分。这一方法的高精度确保了厚度的均匀性和最终产品的特征,且是下游加工步骤成功的必要条件。
采用特殊的砂纸(抛光),加工如此获得的产品的表面,其目的是使得非常薄的微纤维出现,从而得到特征在于表面色斑的外观,天然书写效果和令人愉悦触感的产品。
原始步骤以目视检查结束,所述目视检查起到鉴定在外观中甚至最小缺陷的作用。
通过在压力下操作的容量从70变化到2000米的一系列的JET染色机,进行染色工艺。由于分散的着色剂导致发生微纤维组分的染色,其中合适地选择所述分散的着色剂,得到色调和所需的性能。
紧跟着染色工艺,对产品进行整理处理,所述整理处理起到赋予特定特征,例如柔软度,抗静电防护和耐水性的作用。
在各种部门中使用如此获得的复合非织造织物,覆盖许多表面和形式:在机动车部门(例如,用于内部覆盖物),在内部设计(尤其用于座位和接头),在游艇部门中,和在服装和配件部门中。
尽管在各种部门中广泛地使用微纤维非织造织物,但仍然需要寻找在其中尚未使用它的部门中这一材料新的用途。
因此,申请人解决了使已知的微纤维非织造织物如何改变以供在制备用于生活消费品的覆盖物,优选用于制备生活消费品,尤其电子器件的覆盖物和外壳的问题。生活消费品的实例包括:记录或再现声音或图像的便携式器件,便携式娱乐器件,运动装备或设备,个人福利或健康用器件,电话,手持式计算机,膝上型电脑,和其他电子器件。
因此,要解决的问题是实现制备生活消费品的覆盖物,优选制备生活消费物品,尤其电子产品的覆盖物和外壳使用的具有山羊皮外观,厚度等于或小于0.65mm,优选等于或小于0.60mm,且具有平坦或轻微杂色外观的微纤维产品。这种生活消费品的实例包括:记录或再现声音或图像的便携式器件,便携式娱乐器件,运动装备或设备,个人福利或健康用器件,电话,手持式计算机,膝上型电脑,和其他电子器件。
在这一市场中,薄的厚度和不存在色斑是重要的要求。
在硬的覆盖物的情况下,要求薄的厚度,以便能覆盖许多不同的形状,且在不改变最终产品的总厚度的情况下,能插入到正常的生产工艺中。在柔软的覆盖物的情况下,为了确保充分的柔顺性,和尤其在安装磁性罩的覆盖物或外壳情况下,因太厚的覆盖材料过分地降低磁性强度,要求薄的厚度。
在标准化的物料市场中,不存在色斑(或不突出的色斑)是重要的,其中使用常规、刷漆过的塑料或金属覆盖物的均匀外观的消费者可能将色斑解释为缺陷。
已知的微纤维非织造织物的特征通常在于杂色外观,而根据本发明的非织造织物具有平坦或轻微杂色的外观,在本文引证的应用市场中,这对于消费者来说是更加吸引人的。
对于这类非织造织物来说,术语“表面色斑”拟作为有斑点的外观,且存在完全随机尺寸、形状和分布的浅/暗的深浅同色的大斑点,且得到天然产品典型的不规则外观的产品(然而,在本发明的应用中,这可解释为缺陷)。
因此,具有色斑外观的非织造织物可定义为其中表面的杂色明显突出且扩散,和光与影的对比效果明显的非织造织物。也可参考附图1,清楚地看到该现象,其中存在以上所述的细节是明显的。
具有轻微杂色的外观的非织造织物可定义为其中存在表面色斑,但不那么明显,光与影的对比效果也不那么明显的非织造织物,且斑点通常比较稀少并具有较大的尺寸。关于外观的这些细节在图2中是清楚地可视的。
最后,具有平坦外观的非织造织物可定义为其中几乎完全缺少表面色斑的非织造织物;从任何观察角度来看,该产品颜色均匀,“平坦”。关于外观的这些细节在图3中是清楚地可视的。
关于以上引证的图1-3,非织造织物的外观对于肉眼或者在照片图示中更加可感觉到,若不从“正面”视角,而是“侧面”观察非织造织物,即观察者相对于检查桌的“侧面”定位的话。
实现具有这一有限厚度的复合非织造织物牵涉在已知工艺中关键的与生产有关的问题,它与该工艺过程中中间体生产产品抵抗力差相关。特别地,在染色循环过程中存在于螺栓(bolt)破坏有关的明显的严重问题。而且,减少厚度倾向于导致比较柔软的原始中间体产品,在染色循环过程中,这将导致放大色斑外观。
通过开发相对于现有技术的生产工艺改进的生产微纤维复合非织造织物的方法,申请人解决了这一技术问题,结果使得可获得厚度等于或小于0.65mm,优选等于或小于0.60mm且具有平坦或轻微杂色外观的复合材料。与已知的非织造织物相比,本发明的微纤维非织造织物的外观因此更加均匀。
本发明因此涉及获得厚度等于或小于0.65mm,优选等于或小于0.60mm且具有平坦或轻微杂色外观的微纤维非织造织物的方法,其中在该工艺的最后步骤进行开裂(splitting)步骤。按照这一方式,采用较厚和因此更加抗破坏,且还更加刚硬和因此不那么适合于生成非所需的杂色外观的原始产品,从而到达染色点。此外,在该工艺中,改良缓冲条件,其方式使得获得非常有限的绒毛长度(比采用已知方法获得的绒毛长度小),以便获得平坦和轻微杂色的外观。绒毛长度等于或小于350μm,优选等于或小于300μm。在浸渍过的中间体产品的两面上反复该缓冲工艺。最后,在本发明的方法中改良整理条件,其方式使得获得产品两面相同的外观。
本发明还涉及复合微纤维的非织造织物,它不同于现有技术已知的,在于它的厚度小于或等于0.65mm,优选等于或小于0.60mm,和在于它具有平坦或轻微杂色的外观。本发明的非织造织物的特征优选在于绒毛长度优选等于或小于350μm,更优选等于或小于300μm。可采用本发明的方法,获得这一非织造织物。
本发明的主题还涉及生活消费品的覆盖物,尤其通过使用本发明的非织造织物获得的生活消费品的覆盖物与外壳。这些生活消费品优选包括:记录或再现声音或图像的便携式器件,便携式娱乐器件,运动装备或设备,个人福利或健康用器件,电话,手持式计算机,膝上型电脑,和其他电子器件。
本发明还涉及制备这种覆盖物的非织造织物的用途。
还参考附图,以下更加详细地阐述本发明的进一步的特征与优点,其中:
-图1示出了根据本文以上提供的定义,具有杂色外观的非织造织物;
-图2示出了根据本文以上提供的定义,具有轻微杂色外观的非织造织物;
-图3示出了根据本文以上提供的定义,具有平坦外观的非织造织物;
-图4是采用扫描电镜(SEM)拍摄的实施例1的非织造织物的照片;该照片示出了绒毛长度的测量;
-图5是采用扫描电镜(SEM)拍摄的实施例2的非织造织物的照片;该照片示出了绒毛长度的测量;
本发明涉及获得在聚氨酯基体内浸渍的基于聚酯或聚酰胺微纤维的微纤维非织造织物的方法,包括下述步骤:
A)在海结构内纺丝具有岛的双组分纤维,其中岛组分是微纤维,和与之混溶的海组分在溶剂中可溶;
B)借助机械针或水冲压双组分纤维的方法制备毡;
C)用聚乙烯基粘合剂浸渍该毡;
D)在选择性溶剂内溶解海组分;
E)用聚氨酯粘合剂溶液浸渍该毡,并通过在有机溶剂或水中溶解,除去聚乙烯基粘合剂;
F)在与取向同方向上,通过在两面上旋转砂纸条,在两面上对根据步骤E)的毡进行抛光;
G)对步骤F)中获得的毡进行染色;
H)在两面上刷涂如此获得的染色过的产品,以便在两面上给予纤维同向取向;
I)在厚度方向上,切割根据步骤H)的产品,以便产生两个相同的层压体,厚度各为一半。
双组分纤维包括聚酯或聚酰胺微纤维,优选聚对苯二甲酸乙二酯(PET)(岛组分)和优选由聚苯乙烯(PS)组成的海组分。聚酯微纤维优选具有范围为0.10至0.25dtex,更优选0.12至0.20dtex的纤维支数。
然后,熨烫,卷曲和切割步骤A)中获得的双组分纤维,得到短纤维(绒毛),所述短纤维优选纤维支数范围为3.5至4.5dtex,长度范围为40至60mm,和卷曲频率范围为3至7卷/cm。
在优选的实施方案中,纤维屑包括50%-70%的聚酯重量,和30%-50%的聚苯乙烯重量。纤维部分优选由在聚苯乙烯内变成球状的16根聚酯微纤维构成。
通过针刺工艺在步骤B)中获得的中间体毡产品具有包括0.1至0.3g/cm3的密度和包括300至550g/m2的单位重量。
在步骤C)中,聚乙烯基粘合剂优选是聚乙烯醇(PVA)的水溶液。在允许纤维的尺寸收缩的温度下,优选在95-98℃下进行浸渍。随后,毡经历压延,实现厚度超过8%的收缩率。
在步骤D)中,聚苯乙烯海组分优选溶解在三氯乙烯内。优选地,对残留的毡进行逐渐压延,直到实现超过0.2g/cm3的密度。
步骤E)始于在有机溶剂,优选二甲基甲酰胺(DMF)内制备弹性聚氨酯。制备弹性聚氨酯的工序是本领域已知的,和具体地描述于专利申请EP0584511中。
一旦获得了弹性聚氨酯,则优选在低于50℃的温度下,进行毡的浸渍和聚氨酯的凝结步骤范围为30分钟-2小时的时间段。
然后通过用热水,优选沸水洗涤,除去聚乙烯基粘合剂。然后人们继续干燥用聚氨酯浸渍的毡。
在步骤F)中,用砂纸条在上表面上抛光如此获得的毡,以便释放微纤维并生成绒毛;再缠绕毡,并在下表面上进行抛光,以便砂纸条的旋转方向在上部和下部表面之间生成具有同向取向的绒毛。砂纸优选具有地域500目的目值,更优选低于400目。如此生成的该工艺的中间体产品定义为原始产品。
在步骤G)中,根据合成皮革常规使用的技术,染色原始产品。这些染色工艺例如描述于下述专利申请中:EP0584511和EP1323859。
在步骤H)中,染色过的半成品优选进行两次刷涂:在湿态中第一次刷涂,和在干燥之后第二次刷涂。优选使用旋转方向与纤维取向同向的布什锤辊,在两个表面上进行第一刷涂。在干燥之后施加第二刷涂,和在这一情况下,同样在两个表面上,在刷子的旋转与纤维取向同向的情况下。在以上所述的工艺最后,获得了用聚氨酯浸渍的基于聚酯或聚酰胺的微纤维非织造织物,其特征在于厚度等于或小于0.65mm,优选等于或小于0.60mm,和具有平坦或轻微杂色的外观。绒毛长度优选等于或小于350μm,更优选小于或等于300μm。如此获得的非织造织物具有非常薄的织构和具有平坦或轻微杂色外观的均匀的表面。
由于具有这些特征,因此非织造织物对于在制备生活消费品的覆盖物,优选生活消费品的覆盖物和外壳中使用来说是理想的,所述生活消费品包括例如记录或再现声音或图像的便携式器件,便携式娱乐器件,运动装备或设备,个人福利或健康用器件,电话,手持式计算机,膝上型电脑,和其他电子器件。因此,本发明的主题还涉及这些覆盖物,尤其用于生活消费品的覆盖物和外壳。
实施例
实施例1
A)制备双组分短绒,所述双组分短绒由具有下述特征的在海聚苯乙烯(PS)内的聚对苯二甲酸乙二酯(PET)的微纤维(0.14-0.16dtex)构成:
1.纤维支数:4.2dtex
2.长度:51mm
3.卷曲频率:4-5/cm
特别地,短绒的重量组成为57%PET和43%PS。纤维部分由在PS内变成球状的16根PET微纤维构成。
B)通过双组分短绒的冲孔,制备中间体毡产品,以便获得密度包括0.170至0.210g/cm3和单位重量包括400至480g/m2的产品。
C)在12%的浓度下,用PVA的水溶液浸渍中间体毡产品,并干燥;随后将它浸渍在三氯乙烯浴内,直到PS海完全消失并干燥。
D)独立地在二甲基甲酰胺(DMF)溶液内制备弹性聚氨酯。在第一步(预聚)中,分子量为2000amu的聚己内酯(PCL)和聚四氢呋喃(PTHF)在63℃下在搅拌下与二苯甲烷二异氰酸酯(MDI)在异氰酸酯/二醇摩尔比为2.7/1下反应。在反应2.5小时之后,添加DMF,以便获得具有游离NCO含量为1.46%的25%预聚物溶液。
E)在38℃下维持在步骤D)中获得的预聚物溶液,添加水和二丁胺(DBA),以便获得分子量为15000amu的聚氨酯-聚脲。加热该溶液到63℃的温度,并在搅拌下维持8小时,直到达到在20℃下20,000cP的最终粘度。用DMF稀释该溶液到14%重量,并向其中添加622和234。紧跟着在水中凝结之后,在该溶液内包含的聚合物能生成高孔隙率的结构。
F)用聚氨酯溶液浸渍步骤C)中获得的毡,和在低于48℃的温度下,在约1小时的停留时间之后,它生成了凝结的产品。在沸水浴内洗涤后者,以便完全除去PVA内容物,然后干燥。在上表面上用砂纸条抛光如此获得的材料,以便释放微纤维,并生成绒毛;再缠绕该材料,并在下表面上进行抛光,结果砂纸条的旋转方向在上部和下部表面之间生成具有同向取向的绒毛。
G)根据合成皮革常规使用的技术,染色在步骤F)中获得的原始中间体产品。
H)使用旋转方向与纤维取向同向的布什锤辊,在两个表面上对湿染色的产品进行刷涂。在干燥之后,采用第二刷涂,和在这一情况下,同样通过在两个表面上操作,且刷子的旋转与纤维取向同向。
I)在厚度方向上,将步骤H)中获得的产品切成两半,以便获得两个相同的层压体,各自为一半的厚度。
L)所得最终的产品具有均匀的表面和平坦的外观且绒毛长度为135至170μm,在图4中出现的照片中示出了绒毛长度。
实施例2
A)制备双组分短绒,所述双组分短绒由具有下述特征的在PS海内的PET微纤维(0.19-0.21dtex)构成:
1.纤维支数:4.2dtex
2.长度:51mm
3.卷曲频率:5-6/cm
特别地,短绒的重量组成为80%PET和20%PS。纤维部分由在PS内变成球状的16根PET微纤维构成。
B)通过双组分短绒的冲孔,制备中间体毡产品,以便获得密度包括0.170至0.210g/cm3和单位重量包括400至480g/m2的产品。
C)在12%的浓度下,用PVA的水溶液浸渍中间体毡产品,并干燥;随后将它浸渍在三氯乙烯浴内,直到PS海完全消失并干燥。
D)独立地在DMF溶液内制备弹性聚氨酯。在第一步(预聚)中,分子量为2000amu的PCL和PTHF在63℃下在搅拌下与MDI在异氰酸酯/二醇摩尔比为2.7/1下反应。在反应2.5小时之后,添加DMF,以便获得具有游离NCO含量为1.46%的25%预聚物溶液。
E)在38℃下维持在步骤D)中获得的预聚物溶液,添加水和DBA,以便获得分子量为15000amu的聚氨酯-聚脲。加热该溶液到63℃的温度,并在搅拌下维持8小时,直到达到在20℃下20,000cP的最终粘度。用DMF稀释该溶液到14%重量,并向其中添加622和234。紧跟着在水中凝结之后,在该溶液内包含的聚合物能生成高孔隙率的结构。
F)用聚氨酯溶液浸渍步骤C)中获得的毡,和在低于48℃的温度下,在约1小时的停留时间之后,它生成了凝结的产品。在沸水浴内洗涤后者,以便完全除去PVA内容物,然后干燥。在上表面上用砂纸条抛光如此获得的材料,以便释放微纤维,并生成绒毛;再缠绕该材料,并在下表面上进行抛光,结果砂纸条的旋转方向在上部和下部表面之间生成具有同向取向的绒毛。
G)根据合成皮革常规使用的技术,染色在步骤F)中获得的原始中间体产品。
H)使用旋转方向与纤维取向同向的布什锤辊,在两个表面上对湿染色的产品进行刷涂。在干燥之后,采用第二刷涂,和在这一情况下,同样通过在两个表面上操作,且刷子的旋转与纤维取向同向。
I)在厚度方向上,将步骤H)中获得的产品切成两半,以便获得两个相同的层压体,各自为一半的厚度。
L)所得最终的产品具有带轻微杂色外观,绒毛长度从175变化至220μm,和与前述实施例相比,不那么致密和均匀的绒毛的表面;在实施例2的照片中示出了绒毛的长度。
实施例3(对比例)
A)制备双组分短绒,所述双组分短绒由具有下述特征的在PS海内的PET微纤维(0.14-0.16dtex)构成:
1.纤维支数:4.2dtex
2.长度:51mm
3.卷曲频率:4-5/cm
特别地,短绒的重量组成为57%PET和43%PS。纤维部分由在PS内变成球状的16根PET微纤维构成。
B)通过双组分短绒的冲孔,制备中间体毡产品,以便获得密度包括0.170至0.210g/cm3和单位重量包括400至480g/m2的产品。
C)在12%的浓度下,用PVA的水溶液浸渍中间体毡产品,并干燥;随后将它浸渍在三氯乙烯浴内,直到PS海完全消失并干燥。
D)独立地在DMF溶液内制备弹性聚氨酯。在第一步(预聚)中,分子量为2000amu的PCL和PTHF在63℃下在搅拌下与MDI在异氰酸酯/二醇摩尔比为2.7/1下反应。在反应2.5小时之后,添加DMF,以便获得具有游离NCO含量为1.46%的25%预聚物溶液。
E)在38℃下维持在步骤D)中获得的预聚物溶液,添加水和DBA,以便获得分子量为15000amu的聚氨酯-聚脲。加热该溶液到63℃的温度,并在搅拌下维持8小时,直到达到在20℃下20,000cP的最终粘度。用DMF稀释该溶液到14%重量,并向其中添加622和234。紧跟着在水中凝结之后,在该溶液内包含的聚合物能生成高孔隙率的结构。
F)用聚氨酯溶液浸渍步骤C)中获得的毡,和在低于48℃的温度下,在约1小时的停留时间之后,它生成了凝结的产品。在沸水浴内洗涤后者,以便完全除去PVA内容物,然后干燥。
G)在厚度方向上,将步骤F)中获得的产品切成两半,以便获得两个相同的层压体,各自为一半的厚度。
H)用砂纸条在上表面上抛光如此获得的材料,以便释放微纤维并生成绒毛;
I)根据合成皮革常规使用的技术,染色在步骤H)中获得的原始中间体产品,但该材料降低的物理机械性能使得这一步骤尤其关键,因为具有高的迹象分离和撕裂,这会显著降低制造产率。
L)使用旋转方向与纤维取向同向的布什锤辊,对湿染色的产品进行刷涂。在干燥之后,采用第二刷涂,且刷子的旋转与纤维取向同向。
M)所得成品具有带轻微杂色效果(色斑)和现有技术中微纤维材料典型的绒毛长度的表面。
测定用本发明的方法(实施例1),用现有技术已知的方法(它类似于实施例3中所述的方法,但不具有所实现的产品的较大厚度),和用对比例3的方法获得的原始的半成品的机械性能。
[备注:L=纵向-C=横向]
采用现有技术的方法获得的半成品在干燥步骤之前提供分离步骤,它具有导致充分地耐染色的模量和韧度值。减少厚度到应用所要求的厚度,在工艺相同的情况下,在纵向上和尤其在横向上的韧度特征(非织造织物的缠绕方向)(参见实施例3)下降到太低的水平,提供产品在染色工艺过程中造成的应力充足的抗性。可采用构成本发明主题的方法,解决该问题(参见实施例1),其中原始的半成品的模量和韧度值甚至高于已知方法的那些,和因此高度适合于耐受染色工艺的应力。

Claims (19)

1.在聚氨酯基体内浸渍的基于聚酯或聚酰胺微纤维的微纤维非织造织物的制备方法,该方法包括下述步骤:
A)将具有岛的双组分纤维在海结构内纺丝,其中岛组分是微纤维,且与之混溶的海组分在溶剂中可溶;
B)借助机械针或水冲压双组分纤维的方法制备毡;
C)用粘合剂浸渍该毡;
D)在选择性溶剂内溶解海组分;
E)用聚氨酯粘合剂溶液浸渍该毡,并通过在有机溶剂或水中溶解除去粘合剂;
F)与取向同方向,通过在两面上旋转砂纸条,在两面上对根据步骤E)的毡进行抛光;
G)对步骤F)中获得的毡进行染色;
H)在两面上刷涂染色过的毡,以便在两面上给予纤维同向取向;
I)在厚度方向上,切割根据步骤H)的产品,以便产生两个相同的层压体,厚度各为一半。
2.权利要求1的方法,其中所述双组分纤维包括聚酯或聚酰胺微纤维,且所述海组分包括聚苯乙烯。
3.权利要求1或2的方法,其中熨烫、卷曲和切割步骤A)中获得的所述双组分纤维,得到纤维屑。
4.权利要求1的方法,其中通过机械针或水冲压方法在步骤B)中获得的所述毡具有0.1至0.3g/cm3的密度和300至550g/m2的单位重量。
5.权利要求1的方法,其中在步骤C)中,粘合剂是聚乙烯基粘合剂。
6.权利要求1的方法,其中在步骤D)中,聚苯乙烯海组分溶解在三氯乙烯中。
7.权利要求1的方法,其中在步骤F)中,用目值低于500目的砂纸进行抛光。
8.权利要求1的方法,其中在步骤H)中,对染色过的半成品在湿态下进行第一刷涂和在干燥之后进行第二刷涂。
9.权利要求8的方法,其中在两个面上,使用旋转方向与纤维取向同向的石锤修琢辊,进行所述第一刷涂。
10.权利要求8的方法,其中在两面干燥之后,在刷子的旋转与纤维的取向同向的情况下,施加所述第二刷涂。
11.权利要求1的方法,其中所述双组分纤维包括聚对苯二甲酸乙二酯,且所述海组分包括聚苯乙烯。
12.权利要求1的方法,其中在步骤C)中,粘合剂层是聚乙烯醇的水溶液。
13.权利要求1的方法,其中在步骤F)中,用目值低于400目的砂纸进行抛光。
14.一种采用权利要求1-10任何一项的方法可获得的微纤维非织造织物,它的厚度等于或小于0.65mm且绒毛长度等于或小于350μm且具有平坦或轻微杂色的外观。
15.权利要求14的微纤维非织造织物,它的绒毛长度等于或小于300μm。
16.通过权利要求14或15的非织造织物可获得的用于生活消费品的覆盖物。
17.权利要求16的覆盖物,所述覆盖物是用于电子产品的覆盖物或外壳。
18.权利要求16或17的覆盖物,其中所述生活消费品选自:记录或再现声音或图像的便携式器件,便携式娱乐器件,运动装备或设备,个人福利或健康用器件,电话,手持式计算机,膝上型电脑,和其他电子器件。
19.权利要求14或15的非织造织物用于制备生活消费品的覆盖物的用途。
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