The main factors affecting fabric pilling are as follows:</p
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Fiber length: Fabrics woven with longer fibers have less pilling than fabrics woven with shorter fibers; because there are fewer fiber segments per unit length, there are fewer fiber ends exposed on the surface of the yarn and fabric; in addition, there are fewer fiber ends between the long fibers. The cohesion force is large, and the county committee is not easy to slip out to the surface of the yarn and fabric. �</p
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纤维的细度：粗纤维较细纤维不易起球。粗纤维纺成的纱，单位面积内纤维根数少，露出纱和织物表面的纤维端较少；另外，纤维越粗，越刚硬，竖起在织物表面的纤维不易缠结成球。
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纤维的卷曲度：纤维的卷曲多，纤维间抱合力大，摩擦增加，纤维不易游离到织物表面，也就不易起球。
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纤维的截面形状：纤维的截面形状接近圆形的，纤维间抱合力小，较纤维截面形状接近三角形、多边形等异形纤维容易起球。
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纤维强度、伸长和弹性：纤维强度、伸度高，弹性好的摩擦时不易磨断脱落，一旦起毛后，容易缠结成球。
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纱线的捻度：纱线捻度大，纤维间束缚紧密，织物起球程度降低。
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织物的结构：针织物比机织物容易起球。
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此外，织物的后整理加工和穿着洗涤的方式对织物的起球程度也有影响。
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羊绒衫为什么起球？这是羊绒衫纤维的特点所决定的。
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From the analysis of raw materials, the fineness of cashmere is 14.5-15.9um, the length is 30-40mm, and the curl degree is 3-4 pieces/cm, indicating that cashmere is a thin and shorter fiber with a smaller curl than finer wool; cashmere The cross-section of the fiber is close to circular; cashmere is also a fiber with strong single fiber strength, excellent elongation and elasticity. �</p
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从羊绒纱的捻度方面分析，为使羊绒衫获得良好的手感，在纺纱时捻度不宜过大，因而纤维间的束缚不十分紧密。
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From the analysis of the structure of cashmere sweaters, cashmere sweaters are knitted fabrics, and in order to give full play to the soft and waxy characteristics of cashmere, a key process, the milling process, must be passed during the post-finishing process. One of the purposes of this process is It is to shrink some of the fibers in the cashmere and cover it on the surface of the cashmere sweater to make it soft to the touch. This can easily make the fluff on the surface of the cashmere sweater tangle with each other into a ball. �</p
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综上所述，不难得出一个结论，即羊绒衫少量起球是正常现象，产生的原因跟其原料性质、纱线捻度及织物结构等有很大关系。
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The national textile industry standards have clear regulations on the pilling of knitwear:</p
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Pilling levels are divided into levels 1-5:</p
Level 1 difference means severe pilling;</p
Level 2 is significant pilling;</p
Level 3 is normal pilling;</p
Level 4 is slight pilling;</p
5级为好，为不起球。
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标准中对羊绒针织品起球也有明确规定，羊绒针织品优等品起球数不低于3-4级，一等品起球级数不低于3级�
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