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Standard Test Method for Resistance of Transparent Plastics to Surface Abrasion by the Taber Abraser 用泰伯研磨机测定透明塑料表面耐磨性的标准试验方法
发布日期: 2024-06-01
1.1 本试验方法描述了通过测量光学性能的变化来估计透明塑料对一种表面磨损的耐受性的程序。 1.2 根据试验方法,通过计算雾度百分比的差异,对磨料损伤进行数值量化 2003年1月 在磨损和未磨损的样本之间。 1.3 以国际单位制表示的数值应视为标准。括号中给出的值仅供参考。 注1: 本试验方法等效于ISO 3537第8节和ISO 15082第11节的耐磨性测量,但不等效于任何其他测量或章节。此测试方法不等同于ISO 9352,并且无法直接比较两种方法之间的结果。 注2: 该试验方法类似于SAE J3097/ANSI Z26。 1,测试12。 注3: 先前尝试使用泰伯研磨机测定各种塑料的体积损失 2. 由于归因于数据的过大的变化系数而没有成功。参与实验室之间的协议不足,导致不建议使用体积损失程序作为ASTM测试方法。 注4: 为了通过重量损失测定有机涂层的耐磨性,可参考试验方法 D4060 ,其使用更具攻击性的CS-10或CS-17磨轮。 1.4 本标准并不旨在解决与其使用相关的所有安全问题(如有)。本标准的使用者有责任在使用前制定适当的安全、健康和环境实践,并确定监管限制的适用性。 1.5 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 ====意义和用途====== 4.1 透明塑料材料用作窗户或外壳时,应进行擦拭和清洁;因此在磨损之后保持材料的光学质量是重要的。本试验方法的目的是提供一种估算此类材料对这种类型和磨损程度的阻力的方法。 4.2 尽管该试验方法没有提供基本数据,但它适用于以与使用相关的方式对与此类磨损相关的材料进行分级。 4.3 如果中给出的雾度计要求,则实验室间数据的比较或“雾度”值的规范没有意义 5.4 不使用。这是因为从Taber轨道表面散射的光以窄角度散射( 图1 和 图2 )而被样本内部散射的光以宽角度散射。在许多雾度计中,当插入光圈以将光束限制在磨损轨道的宽度时,出口处的镜面光束会变小。然后,暗环面将大于试验方法中0.023 rad±0.002 rad(1.3°±0.1°)的要求 2003年1月 由于很大比例的窄角度前向散射光不会入射到球壁上,“雾度”读数会变小。对于未适当调整的雾度计,这种减少的幅度取决于积分球直径和入射光束的减少。 图1 磨损轨道表面的光散射(照片) 注1: 这张照片显示了泰伯磨损的样品表面散射的光模式。圆圈显示了增加1.3°的暗环如何显著改变影响球壁的光量。 图2 磨损轨迹表面的光散射(图表) 注1: 该图显示了泰伯磨损轨迹的角度测量曲线。透射的镜面角度为180°。 4.4 对于许多材料,可能有一个规范要求使用该测试方法,但在遵守规范时,会优先进行一些程序修改。因此,在使用本试验方法之前,建议参考该材料规范。分类系统表1 D4000 列出了当前存在的ASTM材料标准。 4.5 对于某些材料,使用泰伯研磨机进行的磨损测试可能会因测试过程中车轮研磨特性的变化而发生变化。 4.5.1 根据磨料类型和试样的不同,由于试样上涂层或其他材料的转移,车轮表面可能会发生变化(即堵塞),必须经常清洁。 4.5.2 已知正在测试的材料类型和正在运行的测试循环次数有时会影响车轮运行表面的温度,从而影响最终雾度测量。为了减少这种温度效应引起的任何变化,在进行实际测量之前,应稳定车轮表面温度。这可以通过对ST-11表面修整石进行多次修整,然后对待测试的样品材料进行测试(结果将被丢弃)来实现。
1.1 This test method describes a procedure for estimating the resistance of transparent plastics to one kind of surface abrasion by measuring the change in optical properties. 1.2 Abrasive damage is numerically quantified by calculating the difference in haze percentage in accordance with Test Method D1003 between an abraded and unabraded specimen. 1.3 The values stated in SI units are to be regarded as standard. The values given in parentheses are for information only. Note 1: This test method is equivalent in the measurement of resistance to abrasion of ISO 3537, Section 8 and ISO 15082, Section 11, but is not equivalent in any other measurement or section. This test method is not equivalent to ISO 9352, and results cannot be directly compared between the two methods. Note 2: This test method is similar to SAE J3097 / ANSI Z26.1, Test 12. Note 3: Prior attempts to employ the Taber Abraser for volume loss determinations of various plastics 2 have been unsuccessful because of excessively large coefficients of variation attributed to the data. Insufficient agreement among the participating laboratories has rendered the use of volume loss procedure inadvisable as an ASTM test method. Note 4: For determining the resistance to abrasion of organic coatings by weight loss, reference is made to Test Method D4060 , which uses more aggressive CS-10 or CS-17 abrasive wheels. 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 4.1 Transparent plastic materials, when used as windows or enclosures, are subject to wiping and cleaning; hence the maintenance of optical quality of a material after abrasion is important. It is the purpose of this test method to provide a means of estimating the resistance of such materials to this type and degree of abrasion. 4.2 Although this test method does not provide fundamental data, it is suitable for grading materials relative to this type of abrasion in a manner which correlates with service. 4.3 Comparison of interlaboratory data or the specification of a “haze” value has no significance if the hazemeter requirements given in 5.4 are not used. This is because light diffused from the surface of a Taber track is scattered at a narrow angle ( Fig. 1 and Fig. 2 ) while light diffused internally by a specimen is scattered at a wide angle. In many hazemeters, when a diaphragm is inserted to limit the light beam to the width of the abraded track, the specular beam at the exit port becomes smaller. The dark annulus will then be greater than the 0.023 rad ± 0.002 rad (1.3° ± 0.1°) requirements of Test Method D1003 . Since a large percentage of the narrow-angle forward-scattered light will not impinge on the sphere wall, “haze” readings become smaller. For hazemeters that have not been properly adjusted, the magnitude of this reduction is dependent both on the integrating sphere diameter and the reduction of the entrance beam. FIG. 1 Light Scattering from Surface of Abraded Tracks (Photograph) Note 1: This photograph shows light pattern of the scattering from the surface of a Taber abraded specimen. The circles show how increasing the 1.3° dark annulus dramatically changes the amount of light impacting the sphere wall. FIG. 2 Light Scattering from Surface of Abraded Tracks (Graph) Note 1: This graph shows goniophotometric curves for Taber abraded tracks. The specular angle of transmission is at 180°. 4.4 For many materials, there may be a specification that requires the use of this test method, but with some procedural modifications that take precedence when adhering to the specification. Therefore, it is advisable to refer to that material specification before using this test method. Table 1 of Classification System D4000 lists the ASTM materials standards that currently exist. 4.5 For some materials, abrasion tests utilizing the Taber abraser may be subject to variation due to changes in the abrasive characteristics of the wheel during testing. 4.5.1 Depending on abradant type and test specimen, the wheel surface may change (that is, become clogged) due to the transfer of coating or other materials from test specimens and must be cleaned at frequent intervals. 4.5.2 The type of material being tested and the number of test cycles being run is known to sometimes influence the temperature of the running surface of the wheel with an effect on the final haze measurement. To reduce any variability due to this temperature effect, stabilize the wheels surface temperature prior to performing actual measurements. This may be accomplished by conducting multiple refacings on an ST-11 refacing stone, followed by a test on the sample material to be tested (with results to be discarded).
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归口单位: D20.10
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