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5.1 Acceptance Testing—This method of testing fabrics resistance to pilling is not recommended for acceptance testing. If it is used for acceptance testing, it should be used with caution because interlaboratory data are not available. In some cases the purchaser or supplier may have to test a commercial shipment of one or more specific materials by the best available method even though the method has not been recommended for acceptance testing. Although this test method is not recommended for acceptance testing, it is useful because it is used widely outside the United States.
5.2 If there is a disagreement arising from differences in values reported by the purchaser and the supplier when using this test method, the statistical bias, if any, between the laboratory of the purchaser and the laboratory of the supplier should be determined with comparison being based on testing specimens randomly drawn from one sample of material of the type being evaluated. Competent statistical assistance is recommended for the investigation of bias. A minimum of two parties should take a group of test specimens, which are as homogeneous as possible and which are from a lot of material of the type in question. The test specimens then should be assigned randomly in equal numbers to each laboratory for testing. The average test results from the two laboratories should be compared using an acceptable statistical protocol and probability level chosen by the two parties before the testing is started. Appropriate statistical disciplines for comparing data must be used when the purchaser and supplier cannot agree. If a bias is found, either its cause must be found and corrected, or the purchaser and the supplier must agree to interpret future results with consideration for the known bias.
5.3 The pilling of textile fabrics is a very complex property because it is affected by many factors that include type of fiber or blends, fiber dimensions, yarn and fabric construction, and fabric finishing treatments. The pilling resistance of a specific fabric in actual wear varies more with general conditions of use and individual wearers than in replicate fabric specimens subjected to controlled laboratory tests. This experience should be borne in mind when adopting levels of acceptability for a series of standards.
5.4 Finishes and fabric surface changes may exert a large effect on pilling. It is recommended that fabrics be tested after laundering or drycleaning, or both. Testing before refurbishing also may be advisable. Prior agreement between interested parties should determine the state of the test.
5.5 Pills vary appreciably in size and appearance and depend on the presence of lint and degree of color contrast. These factors are not evaluated when pilling is rated solely on the number of pills. The development of pills may be accompanied by other surface phenomena, such as loss of cover, color change, or the development of fuzz. Since the overall acceptability of a specific fabric is dependent on both the characteristics of the pills and the other factors affecting the surface appearance, it is suggested that fabrics tested in the laboratory be evaluated subjectively with regard to their acceptability and not rated solely on the number of pills developed. A series of standards, based on graduated degrees of surface change of th......
通常,高卷曲纤维可减少起球;粗纤维刚性较大,也不易起球;短纤长度越长,起球越少,因为突出在单位面积上的纤维末端较少,而且长的纤维电可以被更牢固地固定在纱线上;捻度高可使纱线更紧密,突出的纤维更少,降低纤维的可滑移性,从而减少起球。注:以上试验采用ISO 12945—2:2000马丁代尔方法摩擦2 000转。...
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,去模拟雨水对鞋面材料、或汗水对鞋内里的影响程度.产品主要符合标准:GB/T4802.2纺织品、织物起毛起球性能的测定-圆轨迹法GB/T13775棉、麻、绢丝机织物耐磨试验GB/T21196纺织品马丁代尔法织物耐磨性的测定-试样破损的测定ASTM D4970马丁代尔耐磨仪测定纺织品的抗起毛起球及其表面的其它改变情况,本方法适用于所有的纺织品,尤其适合于机织物。...
检测这些性质的仪器有折皱回复角测定仪、表面均一性测定仪、缩水率测定仪等。 织物折皱回复角检测仪 把织物试样对折施以接近人体重量的压力(150~300克/厘米2),使试样形成折痕,待作用一定时间后去压,使折痕回复。回复角越大,织物抗皱性越好。中国已使用半自动织物折皱弹性测定仪。 织物表面均一性检测仪 织物在服用中常起毛起球和勾丝,这种现象会明显地破坏织物表面的均一性,从而影响织物的表观质量。...
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