ISO 26842-2-2020 PDF

Full title and description

St ISO 26842-2:2020 — Adhesives — Test methods for the evaluation and selection of adhesives for indoor wood products — Part 2: Resistance to delamination in severe environments. This international standard specifies laboratory test procedures and exposure cycles for assessing the resistance to delamination of adhesive/wood combinations and adhesively bonded wood products intended for use in severe indoor environments (where products are exposed to extreme changes of temperature and humidity).

Abstract

This document gives guidelines to select, by means of delamination-resistance tests, adhesive/wood combinations for use in wood products placed in severe environments. It defines a series of exposure cycles at various temperature and humidity values to verify that the adhesive selected, or a product bonded with the adhesive, meets necessary requirements for resistance to delamination. The standard is intended to help select and evaluate adhesives and adhesively bonded wood products; it is not intended for qualification of structural components.

General information

• Status: Published (confirmed).
• Publication date: May 2020.
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 83.180 (Adhesives and adhesive bonding).
• Edition / version: Edition 3 (2020).
• Number of pages: 7 pages.

Basic bibliographic and lifecycle details (status, edition and page count) are taken from the ISO bibliographic entry for ISO 26842‑2:2020.

Scope

Specifies delamination-resistance test methods and exposure cycles to evaluate and select adhesives and bonded wood products intended for indoor use in severe environments characterized by extreme temperature and humidity changes. The standard provides procedures for preparing specimens, for applying controlled environmental cycles and for assessing delamination; it is intended for evaluation and selection rather than structural qualification.

Key topics and requirements

• Definition of delamination-resistance test specimens and specimen preparation requirements.
• Prescribed exposure cycles that combine high/low temperatures and variable humidity to simulate severe indoor environments.
• Acceptance criteria and methods for measuring and reporting delamination (extent, rate and modes of failure).
• Guidance for comparing adhesive/wood combinations and for evaluating finished products (with caution on comparability of finished-product results).
• Statement that the method is not intended for qualification of structural components.

Typical use and users

Used by adhesive manufacturers, wood-product and furniture manufacturers, quality-control and testing laboratories, research organizations and standards committees when selecting or validating adhesives for indoor wood products expected to face severe environmental conditions (e.g., rapid temperature/humidity cycling during transport or use). Test houses use it to develop comparative data for adhesive selection and R&D.

Related standards

ISO 26842 is a multi-part series; Part 1 covers resistance to delamination in non-severe environments (ISO 26842-1:2020). Earlier editions of Part 2 were published in 2009 and 2013 and have been superseded by this 2020 edition. The standard is produced under ISO/TC 61/SC 11, which covers adhesives and adhesive bonding. Users commonly refer to both Part 1 and Part 2 together when establishing test programs for indoor wood products.

Keywords

adhesives, delamination, delamination resistance, indoor wood products, severe environments, temperature cycling, humidity cycling, adhesive selection, test methods, ISO 26842

FAQ

Q: What is this standard?

A: ISO 26842-2:2020 is an ISO test-method standard that specifies laboratory procedures to evaluate resistance to delamination of adhesive/wood combinations intended for indoor products exposed to severe temperature and humidity changes.

Q: What does it cover?

A: It covers specimen preparation, defined environmental exposure cycles (temperature and humidity), measurement and reporting of delamination, and guidance for selecting adhesives based on comparative test results. It explicitly states it is not for structural qualification.

Q: Who typically uses it?

A: Adhesive formulators, manufacturers of wood and engineered wood products, independent testing laboratories, research groups and procurement/quality teams who need to compare and select adhesives for indoor products that may experience severe environmental conditions.

Q: Is it current or superseded?

A: The 2020 edition (Edition 3) is the current published edition of Part 2. ISO records show the 2020 edition as published and confirmed in subsequent review, replacing earlier 2009 and 2013 editions.

Q: Is it part of a series?

A: Yes — ISO 26842 is a multipart series. Part 1 (ISO 26842-1:2020) addresses non-severe environments; Part 2 addresses severe environments. The series provides complementary test methods for evaluating adhesives for indoor wood products.

Q: What are the key keywords?

A: Adhesives; delamination; indoor wood products; severe environments; humidity cycling; temperature cycling; test method; adhesive selection; ISO 26842.