SIST ISO 3781:2013 PDF

Name: SIST ISO 3781:2013 — Paper and board -- Determination of tensile strength after immersion in water
SKU: SIST ISO 3781:2013
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Paper and board -- Determination of tensile strength after immersion in water

Название (английский):

SIST ISO 3781:2013

Paper and board -- Determination of tensile strength after immersion in water

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 9
Дата публикации:: 21 февраля 2013 г.
ICS:: 85.060
Технический комитет:: VPK - Pulp, paper, board and products

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Описание (английский):

ISO 3781:2011 specifies a test method for the determination of the wet tensile strength of paper or board after its immersion in water for a specified period. In principle, the method is applicable to both paper and board, provided an appropriate soaking time is agreed between the interested parties. It is not applicable to tissue paper and tissue products other lightweight, highly absorbent paper which is difficult to handle or of low strength when wet (see ISO 12625‑5).

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

SIST ISO 3781:2013 is an International Standard specifying a test method to determine the wet tensile strength of paper and board after immersion in water for a specified period. This method assesses how much tensile force soaked paper or board can withstand before breaking, which is crucial for materials exposed to moisture in their application. The standard applies broadly to paper and board materials, excluding tissue paper and other lightweight, highly absorbent papers, which require different testing methods.

By providing a consistent, repeatable procedure for wet tensile strength measurements, SIST ISO 3781:2013 enables manufacturers, quality control laboratories, and researchers to evaluate the durability and mechanical performance of paper products after water exposure. The standard supports quality assurance and product specification development in the paper industry.

Key Topics

Scope and Application SIST ISO 3781:2013 applies to paper and board subjected to immersion in water to simulate wet conditions. It excludes tissue papers, which have low wet strength and different handling needs. Soaking time can vary but is typically one hour unless otherwise agreed.

Test Methodology The test involves soaking test pieces in distilled or deionized water according to ISO 14487, followed by tensile strength measurement using a tensile testing apparatus operating at a constant rate of elongation (20 mm/min or 100 mm/min). Test pieces are prepared and conditioned following ISO 1924-2 or ISO 1924-3.

Tensile Strength and Retention Calculations Results include:

Wet tensile strength (maximum force per unit width) expressed in kilonewtons per meter (kN/m)
Wet tensile strength retention calculated as a percentage comparing wet to dry tensile strength, indicating how well the paper retains strength after soaking.

Precision and Repeatability Annex A provides precision data based on interlaboratory tests, estimating repeatability and reproducibility limits to ensure test reliability and accuracy.

Reporting Requirements The test report must include identification, soaking time, conditioning atmosphere, tensile method used, numerical results, and any deviations or influencing factors.

Applications

SIST ISO 3781:2013 is essential for industries where paper and board products are exposed to moisture or wet conditions, helping to:

Evaluate Packaging Materials Ensure paperboard and packaging retain structural integrity during shipping or storage under humid or wet conditions.

Develop Paper with Improved Wet Strength Support R&D efforts to enhance wet strength for specialty papers used in labels, maps, or outdoor products.

Quality Control Monitor production consistency and compliance with wet strength specifications to meet customer and regulatory requirements.

Benchmarking and Material Comparison Allow manufacturers to compare performance characteristics of different paper grades or treatments under standardized testing.

Related Standards

ISO 1924-2 & ISO 1924-3 Methods for tensile strength testing of paper and board at constant elongation rates, referenced for dry and wet testing procedures.

ISO 12625-5 Specific method for determining wet tensile strength of tissue paper and tissue products, not covered by SIST ISO 3781:2013.

ISO 14487 Standard defining the quality of distilled or deionized water used for physical testing.

ISO 186 Guidelines for sampling paper and board to ensure representative quality testing.

ISO 187 Conditions for sample conditioning and atmosphere monitoring prior to testing.

By adhering to SIST ISO 3781:2013, stakeholders in the paper industry can reliably assess and ensure the wet tensile performance of paper and board products, optimizing material selection and usage in applications involving water exposure. This standard is a fundamental tool for advancing product durability, quality assurance, and innovation in wet strength technologies.

SIST ISO 3781:2013 PDF

Abstract

Похожие стандарты

Overview

Key Topics

Applications

Related Standards

Технические детали

BS ISO 14487:1997

Pulps. Standard water for physical testing.

BS EN ISO 1924-2:2008

Paper and board. Determination of tensile properties. Constant rate of elongation method (20 mm/min).

ISO 1924-3:2005

Paper and board — Determination of tensile properties — Part 3: Constant rate of elongation method (100 mm/mi…

SIST EN ISO 12625-5:2024

Tissue paper and tissue products - Part 5: Determination of wet tensile strength (ISO 12625-5:2024)

BS ISO 18692-1:2026

Fibre ropes for offshore stationkeeping. General specification.

BS EN ISO 18771:2020

Anodizing of aluminium and its alloys. Method to test the surface abrasion resistance using glass-coated abra…