SIST ISO 458-2:1996 PDF

Name: SIST ISO 458-2:1996 — Plastics -- Determination of stiffness in torsion of flexible materials -- Part 2: Application to plasticized compounds of homopolymers and copolymers of vinyl chloride
SKU: SIST ISO 458-2:1996
Price: 31.42 EUR
Availability: InStock

Plastics -- Determination of stiffness in torsion of flexible materials -- Part 2: Application to plasticized compounds of homopolymers and copolymers of vinyl chloride

Название (английский):

SIST ISO 458-2:1996

Plastics -- Determination of stiffness in torsion of flexible materials -- Part 2: Application to plasticized compounds of homopolymers and copolymers of vinyl chloride

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 2
Дата публикации:: 1 июня 1996 г.
ICS:: 83.080.20
Технический комитет:: IPMA - Polimer materials and products

Тип поставки:

Full version30 €Read online 24h10 €Read online 72h15 €

Язык документа:

ruen

Срок поставки:1 раб. дн. (перевод)

Цена:30 €

Описание (английский):

Application of the general method in ISO 458-1 for the above mentioned plastics according to the special case of the method with an angle of deflection between 55 and 65 . The temperatures according to three characteristic values of the torsion stiffness; 300 MPa, 23 MPa and 4 MPa are to be determined for the material under test.

Abstract

Похожие стандарты

Упомянутые в описании и другие стандарты SIST

Overview

SIST ISO 458-2:1996 is an international standard developed by the International Organization for Standardization (ISO) that specifies a method for determining the torsional stiffness of flexible plastic materials. This part of the ISO 458 series focuses specifically on plasticized compounds of homopolymers and copolymers of vinyl chloride (PVC). It provides a precise procedure for measuring torsional stiffness over a temperature range, corresponding to key stiffness values relevant for practical applications of flexible PVC materials. The standard complements the general testing methods outlined in ISO 458-1 by addressing the particular behavior of PVC compounds when subjected to torsion.

Key Topics

Scope and Purpose: Applies ISO 458-1 general procedures to plasticized vinyl chloride homopolymers and copolymers with an angle of deflection between 55° and 65°.

Characteristic Stiffness Values: The standard identifies three key values of torsion stiffness to be determined:

300 MPa (high stiffness region)
23 MPa (intermediate stiffness)
4 MPa (low stiffness region)

Temperature Determination: The temperatures at which these stiffness values occur are established to characterize the material’s flexibility and rigidity properties over different thermal conditions.

Test Specimens: Specifies the use of test specimens with distinct thickness ranges for accurate measurement near each stiffness value:

1.8 to 2 mm
2 to 5 mm
4 to 5 mm

Testing Procedure: Detailed steps for applying torque and measuring angular deflection to calculate stiffness, followed by plotting torsional stiffness logarithm against temperature to analyze the material’s behavior.

Application of the Method: Focus on the "S-shaped" curve of stiffness versus temperature common in plasticized PVC materials, defining zones of high stiffness, intermediate transition, and low stiffness for comprehensive analysis.

Applications

SIST ISO 458-2:1996 is critical for manufacturers, quality control laboratories, and researchers working with flexible PVC compounds, particularly when evaluating:

Material Performance Under Temperature Variations: Understanding how plasticized PVC loses stiffness and gains flexibility at different temperatures aids in product design.

Flexibility and Durability Analysis: Essential for products such as flexible films, curtains, tablecloths, and waterproof materials where mechanical torsional properties influence usability.

Standardized Testing for Compliance: Enables consistent and comparable torsional stiffness results across different batches and suppliers.

Material Development and Optimization: Helps in modifying plasticizer content or polymer blends to achieve desired flexibility properties suited for specific end-use conditions.

Quality Assurance: Ensures materials meet stiffness requirements critical for manufacturing processes and final product performance.

Related Standards

ISO 458-1: Plastics - Determination of stiffness in torsion of flexible materials - Part 1: General method Provides the foundational testing method on which ISO 458-2 builds its specific application for PVC compounds.

ISO/R 458-1965 The previous version of the stiffness determination method, now superseded by ISO 458-1 and ISO 458-2, reflecting updated technical revisions.

Other ISO Standards on Plastic Testing Standards related to mechanical and thermal property evaluation of plastics for comprehensive material characterization.

Keywords: ISO 458-2, torsion stiffness, plasticized PVC, flexible plastics, homopolymers of vinyl chloride, copolymers of vinyl chloride, plasticized compounds, plastics testing, torsional rigidity, temperature-dependent stiffness, standard test method, ISO plastics standards.

SIST ISO 458-2:1996 PDF

Abstract

Похожие стандарты

Overview

Key Topics

Applications

Related Standards

Технические детали

SIST EN ISO 4589-2:2017

Plastics - Determination of burning behaviour by oxygen index - Part 2: Ambient-temperature test (ISO 4589-2:…

SIST ISO 4581:1996

Plastics -- Styrene/acrylonitrile copolymers -- Determination of residual acrylonitrile monomer content -- Ga…

SIST EN ISO 6338:2026

Method to calculate GHG emissions at LNG plant (ISO 6338:2023)

SIST-TP CEN ISO/ASTM TR 52958:2026

Additive manufacturing of metals - Powder bed fusion (PBF) - In-situ coaxial photodiode monitoring for lack o…

SIST EN ISO 41002:2026

Facility management - Development of the facility management organization (ISO 41002:2026)

SIST EN ISO 844:2026

Rigid cellular plastics - Determination of compressive properties (ISO 844:2026)

SIST-TS CEN ISO/TS 17664-3:2026

Processing of health care products - Information to be provided by the medical device manufacturer for the pr…

SIST EN ISO 8980-4:2026

Ophthalmic optics - Uncut finished spectacle lenses - Part 4: Specifications and test methods for the propert…