ISO 11468:1997

Name: ISO 11468:1997 — Plastics — Preparation of PVC pastes for test purposes — Dissolver method
SKU: ISO 11468:1997
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Plastics — Preparation of PVC pastes for test purposes — Dissolver method

Название (английский):

ISO 11468:1997

Plastics — Preparation of PVC pastes for test purposes — Dissolver method

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 4
Дата публикации:: 11 декабря 1997 г.
Издание:: ISO IS 11468 edition 1 version 1
ICS:: 83.080.20

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Описание (английский):

La présente Norme internationale prescrit une méthode pour la préparation des pâtes PVC fabriquées avec du chlorure de vinyle polymérisé (VC), méthode mettant en oeuvre un dispositif pour dissolution. Ces pâtes PVC permettent à la fois de caractériser les différents polymères VC par référence à leur comportement rhéologique et d'évaluer l'uniformité des diverses livraisons. La méthode peut également être utilisée pour préparer des pâtes de composition différente (avec stabilisants, par exemple), toutefois de telles pâtes ne peuvent pas être utilisées pour la désignation de la résine.

Abstract

Похожие стандарты

Упомянутые в описании и другие стандарты ISO

Overview

ISO 11468:1997 - Plastics - Preparation of PVC pastes for test purposes - Dissolver method - specifies a reproducible laboratory procedure for preparing PVC pastes (plastisols) using a mechanical dissolver. The standard defines apparatus, mixing vessel sizes, operating practice and documentation needed to produce pastes used to characterize PVC resins (rheology, viscosity and batch-to-batch consistency).

Key topics and technical requirements

Purpose: Preparation of PVC pastes from polymerized vinyl chloride for rheological testing and to establish consistency between deliveries.

Apparatus: A motor-driven dissolver with a coarsely toothed stainless-steel disc, suitable mixing vessels (single- or double-walled) and an external cooling system (water-cooled double-walled vessel recommended). Disc teeth are inclined (~30°) and alternate vertically. Vessel/disc sizes and typical paste masses are specified (examples: disc diameters 40/50/80 mm; vessel diameters 65/80/120 mm; paste amounts ~200, 400, 1 500 g).

Operating parameters: Condition resin and plasticizer at 23 °C (±1 °C). Initially wet the resin into the plasticizer manually, then mix in the dissolver for defined intervals (typical cycle includes two mixing intervals of about 150 s each, with a manual scrape between). Maintain constant spindle speed during mixing (speed varies with dissolver size). Prevent paste temperature exceeding 35 °C; use external cooling to remove frictional heat.

Materials & measurement: Use stainless-steel components; weigh ingredients accurately (weighing to 1 g; balance accuracy 0.5 g recommended). If paste is for viscosity measurement, de-aerate under partial vacuum (example 700 Pa) until foam collapses and hold for ~5 minutes.

Reporting: Paste-preparation report must reference ISO 11468, identify the PVC resin, record paste formulation, end-of-mix temperature, preparation date and any deviations.

Applications and who uses it

Quality control laboratories verifying PVC resin rheological properties and batch consistency.

R&D and materials testing labs preparing standardized plastisols for viscosity and processing studies.

PVC resin manufacturers and converters needing reproducible paste preparation for internal specification testing.

Third-party testing bodies and certification labs applying standardized procedures for comparative testing.

Keywords: ISO 11468, PVC pastes, dissolver method, plastisol preparation, PVC rheology, paste preparation, viscosity measurement, plastics testing.

ISO 11468:1997

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Applications and who uses it

Related standards

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