意味と目的
4.1 硬質気泡プラスチックの用途は多様であるため、, so the effective behavior of human exposure to estimate these materials need to a large extent based on the desired application. このために, the test method is designed to recommend a variety of conditions, select one or more required exposure conditions. (注記 3)

4.2 The conditions recommended in this test method have been widely used to artificially expose rigid porous plastics and to determine the effects of various temperatures and humidity on these materials. The ultimate test measured value in determining sample after return to room temperature. In the specified case, samples will be tested under exposure conditions but will need to be reported.

4.3 through the test method for measuring the size of the changes can be used to compare the material performance in a specific environment, evaluation of two or more relative stability of porous plastic, or specify particular materials acceptance criteria. The results of this testing method are not suitable for predicting end-use product performance or characteristics and are not sufficient for engineering or design calculations.

ASTM D2126-2020 硬質発泡プラスチックの熱老化反応および湿式老化反応の標準試験方法

注記 3: If a thermal shock is known or suspected to occur as a result of rapid heating to (or cooling from) a specific temperature, guidance should be obtained from the manufacturer of the material in question as to the allowable heating or cooling rate or both.

注記 4: the size of the sample changes may be due to the age of the sample or sample preparation and testing began between the length of time or both.

4.4 Before performing this test method, reference should be made to the specifications of the material being tested. Material specification or its portfolio covers any sample preparation, 調整, size or test parameters should be prior to this test method mentioned in the argument. If there is no specification, the default condition applies.

ASTM D2126-2020 硬質発泡プラスチックの熱老化反応および湿式老化反応の標準試験方法

の範囲
1.1 The test method covers heat exposure and moisture exposure procedures for rigid porous plastics. The terms of use shall be agreed between the buyer and the supplier.

注記 1: the list common exposure conditions are shown in table 1.

1.2 SI単位までを標準とする. 括弧内の値は参考値です.

1.3 この規格は、すべての安全問題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、この規格の使用者の責任です。, 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 2: this test method on sampling and part equivalent to ISO 2796. It is not equivalent to ISO 2796 in the procedures section.

1.4 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従って開発されました。, 世界貿易機関の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.