国产精在线观看品自产拍,麻豆av无码精品一区二区,无遮挡h肉动漫在线观看免费资源,欧美A片视频网站在线观看

ASTM D4459是室內用塑料氙燈曝露測試的標準測試方法：

ASTM D4459規(guī)定了依照測試方法G151和G155，用配備窗玻璃濾光器的氙燈設備對塑料進行暴露測試的具體程序和測試條件，以評估室內用塑料的穩(wěn)定性。

附ASTM D4459英文版本(摘抄)

4.1 This practice is intended to simulate the effects produced by exposure to solar radiation through glass. This practice uses exposure in a xenon-arc device equipped with window glass filters and operated in accordance with Practices G151 and G155.

Note 2—Practice D4674 describes exposures in a device that uses a combination of fluorescent “cool white” and ultraviolet (UV) lamps to simulate the effects of exposures to indoor fluorescent light and window glass filtered daylight.

4.2 Warning—Variation in results may be expected when operating conditions are varied within the accepted limits of this practice. Therefore, all references to the use of this practice must be accompanied by a report prepared in accordance with Section 9 that describes the specific operating conditions used. Refer to Practice G151 for detailed information on the caveats applicable to use of results obtained in accordance with this practice.

Note 3—Additional information on sources of variability and on strategies for addressing variability in the design, execution and data analysis of laboratory accelerated exposure tests is found in Guide G141.

4.3 Test results will depend upon the care that is taken to operate the equipment in accordance with Practice G155. Significant factors include regulation of line voltage, temperature and humidity control, and condition and age of the lamps and filters.

4.4 Reproducibility of test results between laboratories has been shown to be good when the stability of materials is evaluated in terms of performance ranking compared to other materials or to a control.4,5 Therefore, exposure of a similar material of known performance (a control) at the same time as the test materials is strongly recommended. It is recommended that at least three replicates of each material be exposed to allow for statistical evaluation of results.

1. Scope

1.1 This practice covers specific procedures and test conditions that are applicable for exposure of plastics in window glass-filtered xenon-arc devices in accordance with Practices G151 and G155 for evaluating the stability of plastics intended for use in indoor applications.

1.2 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 and health practices and determine the applicability of regulatory limitations prior to use.

Note 1—There is no known ISO equivalent to this practice.

Referenced ASTM Standards(相關標準)

D1729 Practice for Visual Appraisal of Colors and Color Differences of Diffusely-Illuminated Opaque Materials

D2244 Practice for Calculation of Color Tolerances and Color Differences from Instrumentally Measured Color Coordinates

D3980 Practice for Interlaboratory Testing of Paint and Related Materials

D4674 Practice for Accelerated Testing for Color Stability of Plastics Exposed to Indoor Office Environments

D5870 Practice for Calculating Property Retention Index of Plastics

E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method

G113 Terminology Relating to Natural and Artificial Weathering Tests of Nonmetallic Materials

G141 Guide for Addressing Variability in Exposure Testing of Nonmetallic Materials

G147 Practice for Conditioning and Handling of Nonmetallic Materials for Natural and Artificial Weathering Tests

G151 Practice for Exposing Nonmetallic Materials in Accelerated Test Devices that Use Laboratory Light Sources

G155 Practice for Operating Xenon Arc Light Apparatus for Exposure of Non-Metallic Materials

G169 Guide for Application of Basic Statistical Methods to Weathering Tests

ASTM D4459-06標準

1. Scope

1.1 This practice covers specific procedures and test conditions that are applicable for exposure of plastics in window glass-filtered xenon-arc devices in accordance with Practices G 151 and G 155 for evaluating the stability of plastics intended for use in indoor applications.

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 and health practices and determine the applicability of regulatory limitations prior to use.

Note 1 - There is no known ISO equivalent to this practice.

ASTM D4459-99標準

1. Scope

1.1 This practice covers the procedure applicable when Practice G26, Method C, is employed for exposing plastics to a Xenon lamp, in attempting to predict long-term color-fastness of plastics for use in indoor areas. Such exposure may involve illumination from fluorescent, incandescent, or window-filtered sunlight sources, and thermal radiation.

1.2 This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

Note 1-There is no similar or equivalent ISO standard.

符合ASTM D4459 標準的試驗箱

Xe-3-HSC氙燈耐候試驗箱提供了全光譜太陽光，氙燈試驗箱中接近水平的樣品安裝和可選的噴淋和雙噴提供了zui真實的潮濕模擬環(huán)境。

了解更多關于ASTM D4459的信息請訪問：/bz23.html