EN ISO 1624:2001 PDF

Plastics - Vinyl choride homopolymer and copolymer resins - Sieve analysis in water (ISO 1624:2001)

Название (английский):

EN ISO 1624:2001

Plastics - Vinyl choride homopolymer and copolymer resins - Sieve analysis in water (ISO 1624:2001)

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 9
Дата публикации:: 15 декабря 2001 г.
Издание:: CEN EN 1624 edition 2 version 1
ICS:: 83.080.20

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Описание (английский):

L'ISO 1624 spécifie une méthode pour déterminer le refus sur tamis de résines d'homopolymères et de copolymères de chlorures de vinyle. Le contrôle de cette caractéristique peut contribuer à assurer l'homogénéité du produit livré, ainsi qu'un comportement prévisible lors de la mise en oeuvre.

Технические детали

Технический комитет: CEN/TC 249 - Plastics
SKU: EN ISO 1624:2001

Abstract

Overview

EN ISO 1624:2001 (ISO 1624:2001) specifies a laboratory method for sieve analysis in water of vinyl chloride homopolymer and copolymer resins. The standard defines a wet sieving procedure to determine sieve retention (percentage by mass retained on a sieve), helping manufacturers and testing laboratories control particle-size distribution and predict processing behaviour. The method is particularly suited to emulsion resins and is endorsed by CEN as a European standard.

Key topics and requirements

Principle: Sieving under a stream of water to avoid static charging and obtain truer particle-size results than dry sieving.
Sieve sizes: Uses standard aperture sieves (notably 0.250 mm and 0.063 mm) chosen from the ISO 565 series. Other mesh sizes may be used only if the prescribed sieves are also used.
Sample & reagents: Typical test portion ~25 g; wetting agent recommended (e.g., 5–10% sodium alkylsulfonate solution).
Apparatus: Sprinkling device that wets and agitates the resin without bulk water accumulation; filter funnel/crucible (40 mm, pore 20–40 μm); oven capable of 110 °C ± 2 °C; balance accurate to ±0.01 g.
Procedure: Recommended use of two superimposed sieves with individual sprinklers; transfer residues to filter or dry on sieve; dry to constant mass at 110 °C; duplicate determinations required.
Acceptance of duplicates: If residue ≥ 5% the two duplicates must differ by ≤ 2%; if residue

Overview

Key topics and requirements

Principle: Sieving under a stream of water to avoid static charging and obtain truer particle-size results than dry sieving.
Sieve sizes: Uses standard aperture sieves (notably 0.250 mm and 0.063 mm) chosen from the ISO 565 series. Other mesh sizes may be used only if the prescribed sieves are also used.
Sample & reagents: Typical test portion ~25 g; wetting agent recommended (e.g., 5–10% sodium alkylsulfonate solution).
Apparatus: Sprinkling device that wets and agitates the resin without bulk water accumulation; filter funnel/crucible (40 mm, pore 20–40 μm); oven capable of 110 °C ± 2 °C; balance accurate to ±0.01 g.
Procedure: Recommended use of two superimposed sieves with individual sprinklers; transfer residues to filter or dry on sieve; dry to constant mass at 110 °C; duplicate determinations required.
Acceptance of duplicates: If residue ≥ 5% the two duplicates must differ by ≤ 2%; if residue

EN ISO 1624:2001 PDF

Технические детали

Abstract

Overview

Key topics and requirements

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Abstract

Overview

Key topics and requirements

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