GOST 23785.5-2001 PDF

Full title and description

GOST 23785.5-2001 — "Ткань кордная. Метод определения линейной усадки" (English: "Cord fabric. Method for determination of linear shrinkage"). The standard specifies a laboratory procedure for determining the linear shrinkage of the main yarn in polyamide cord fabric used as reinforcement materials.

Abstract

This interstate (GOST) standard establishes sampling, test conditions and calculation procedures to measure the linear shrinkage of cord fabric yarns (primarily polyamide), including preconditioning, marking, thermal treatment, loading and formulae for computing percentage shrinkage and reporting results. It replaces the earlier GOST 23785.5-79.

General information

• Status: Active (interstate standard adopted and implemented; listed as in-force in Russian / interstate catalogs at time of reference).
• Publication date: Designation year 2001; introduced into effect 1 December 2002 (publication items dated 2002).
• Publisher: Adopted by the Interstate Council for Standardization, Metrology and Certification and published in standard collections (IPK — Publishing House of Standards editions noted in bibliographic listings).
• ICS / categories: ICS 59.080.30 (textile products / products of the textile industry).
• Edition / version: GOST 23785.5-2001 (replaces GOST 23785.5-79).
• Number of pages: 7 pages (concise test method document).

Scope

The standard applies to polyamide cord fabric produced with yarns that may be stabilized or unstabilized and defines the laboratory method for determining linear shrinkage of the principal (warp) yarn of the cord fabric. It covers sampling requirements, test apparatus, preconditioning, a thermal treatment (drying at specified temperature and time), measurement points and calculation/rounding rules for reporting shrinkage percentage.

Key topics and requirements

• Sampling: laboratory samples taken along full length with width ≥ 50 mm; at least 5 yarns per laboratory sample and a minimum total of 25 tests.
• Preconditioning: samples conditioned in climatic conditions per referenced textile conditioning standard prior to testing.
• Marking and measurement: marks at 0 and 250 mm on yarn; measurement accuracy to 1 mm.
• Thermal treatment: exposure of suspended yarns in a drying oven at (160 ± 2) °C for 20 minutes (control point specified at mid‑span).
• Preliminary load: preliminary loading prescribed based on nominal linear density (5.0 mN/tex as per referenced GOST 26171).
• Result calculation: shrinkage computed as percent change between original and post‑treatment lengths, calculated to specified decimal places and rounded per the standard.

Typical use and users

Used by textile test laboratories, cord fabric and tire/technical rubber reinforcement manufacturers, quality control departments, materials engineers and conformity assessment bodies to verify dimensional stability of cord fabrics and to ensure materials meet design and processing requirements for rubber goods and composite reinforcements.

Related standards

Normative references and related documents cited within the standard include: GOST 23785.0-2001 (sampling and acceptance rules for cord fabric), GOST 23785.1-2001 (tensile test methods for cord fabric), GOST 10681-75 (textile conditioning/climatic conditions), GOST 19603-74 (yarn length measurement methods) and GOST 26171-84 (preliminary load norms for fibres and yarns). The document replaces GOST 23785.5-79.

Keywords

cord fabric, cord cloth, polyamide, shrinkage, linear shrinkage, textile testing, thermal treatment, sampling, GOST 23785.5-2001.

FAQ

Q: What is this standard?

A: It is GOST 23785.5-2001, an interstate standard titled "Cord fabric. Method for determination of linear shrinkage" that defines a laboratory test method for measuring linear shrinkage of the main yarn in polyamide cord fabric.

Q: What does it cover?

A: It covers sample selection, preparation, marking, apparatus, oven thermal treatment (160 ± 2 °C for 20 min), measurement procedure, preliminary loading rules and calculation/rounding of percentage shrinkage results.

Q: Who typically uses it?

A: Textile testing laboratories, cord fabric and technical-rubber (tyre and reinforcement) manufacturers, QC/assurance teams and standards bodies for conformity assessment and material specification.

Q: Is it current or superseded?

A: The standard GOST 23785.5-2001 replaced the earlier GOST 23785.5-79 and is listed as the active interstate standard in referenced catalogs. Note that national adoptions and catalog listings may change over time; users should confirm current status in the applicable national standards registry before relying on it for regulatory compliance.

Q: Is it part of a series?

A: Yes — it forms part of the GOST 23785 series for cord fabric (there are companion parts addressing sampling/acceptance, tensile testing and related test methods). Related parts include GOST 23785.0-2001 and GOST 23785.1-2001 among others.

Q: What are the key keywords?

A: cord fabric; polyamide; linear shrinkage; shrinkage test; textile testing; oven treatment; preliminary load; GOST.