意味と使い方
4.1 光分解性プラスチックで作られた材料は、太陽光にさらされると急速に劣化します。, 酸素, 熱, moisture and other weather-degrading elements. This practice is used to assess the photodegradability of plastics when exposed to devices that produce simulated daylight (1,2) 6 and control temperature and humidity. The exposures used in this practice are not intended to simulate deterioration caused by local weather phenomena such as atmospheric pollution, 生物攻撃, そして塩水への曝露. Positive correlation of exposure results between this device and other laboratory aging devices is not possible.

4.2 Changes in results can be expected when operating conditions vary within the accepted limits of this practice. したがって, all test results using this specification need to be accompanied by the specific operating conditions required in Section 9. For more information about the precautions that apply to using results obtained under this practice, see Practice G151.

4.3 The results of laboratory exposure cannot be directly extrapolated to estimate the absolute rate of environmental degradation, as the acceleration factor depends on the material and can vary greatly for each material and different formulations of the same material. しかし, exposure to similar materials with known outdoor properties, コントロール, and simultaneously with test samples allows comparison of durability under test conditions relative to controls. The evaluation of relative durability also greatly improves the consistency of test results between different laboratories (3).

4.4 Test results will depend on the degree of care taken to operate the equipment in accordance with practice G155. Important factors include regulation of line voltage, 塩分やその他の水の堆積がないこと, 温度と湿度の管理, and condition and age of burners and filters.

注記 2: 変動の原因と設計の変動に対処する戦略に関する追加情報, 実行, および実験室加速曝露試験のデータ分析, see Guideline G141.

4.5 Before continuing this practice, it is common practice to refer to the specifications of the material under test. Any sample preparation, 調整, sizing, or test parameter or combination thereof covered in the Material Specification shall take precedence over the sample preparation, 調整, sizing, or test parameter or combination thereof referred to in this specification. If there is no material specification, default conditions apply.

ASTM D5071-2022 キセノンランプ装置における光分解性プラスチックの暴露試験のための標準試験方法:

半径
1.1 This procedure covers specific procedures and test conditions applicable to xenon arc exposure of photodegradable plastics in accordance with practices G151 and G155. The practice also includes the preparation of samples, suitable test conditions for photodegradable plastics, および試験結果の評価.

1.2 この規格は、すべての安全上の懸念に対処することを目的としたものではありません, もしあれば, その使用に関連する. 適切な安全性を確立するのは、この規格のユーザーの責任です。, 健康および環境慣行を確認し、使用前に規制制限の適用可能性を判断するため.

注記 1: This practice is technically equivalent to ISO 4892-2 and Practice D2565, which covers xenon arc exposure of long-term plastics for outdoor applications.

1.3 この国際規格は、国際規格開発の原則に関する決定で確立された国際的に認められた標準化原則に基づいています。, WTO貿易の技術的障壁に関する委員会が発行したガイドラインと勧告.