ISO 7972:2023 接着剤 - オープンフェイス試験片を使用した接着剤層への水分の吸収と二次接着によるせん断強度の測定 | ページ 2

Foreword

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This document was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 11, Products.

Introduction

Adhesives absorb moisture from the environment over a long period of time. The absorbed water often decreases the strength of the adhesive. Therefore, it is important to evaluate the effect of absorbed water properly to ensure the durability of adhesive bonding joints. Such an evaluation is generally time-consuming because the penetration of water into the adhesive layer is a slow process. Additionally, the moisture in the adhesive layer can alter the chemical and physical properties of the adhesive layer and interface over time.

1 Scope

This document specifies a method for the rapid permeation of water to an adhesive layer using a specimen with one side open, the secondary bonding of the specimens with the adhesive layer that is still moistened, and a shear strength test of the secondary bonded specimen, for the selection of water-resistant adhesives and the determination of suitable surface treatments. It does not assess the water resistance of the actual joint itself, as the distribution of water in the adhesive layer is different. This test procedure does not provide design information.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 472 and the following apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

Bibliography