1.1 This part of ISO 8257 establishes a system of designation for poly(methyl methacrylate) (PMMA) thermoplastic materials, which may be used as the basis for specifications. 1.2 The types of PMMA plastics are differentiated from each other by the classification system based on appropriate levels of the designatory properties a) Vicat softening temperature, b) melt mass-flow rate, c) viscosity number (optional), and on information about intended application and/or method of processing, important properties, additives and colorants. 1.3 This part of ISO 8257 is applicable to all poly(methyl methacrylate) homopolymers and to copolymers of methyl methacrylate (MMA) containing at least 80 % (m/m) of MMA and not more than 20 % (m/m) of acrylic esters or other monomers. It applies to materials ready for normal use in the form of beads, granules and pellets and to materials unmodified or modified by colorants, additives, etc. This part of ISO 8257 does not apply to PMMA modified with elastomers. 1.4 It is not intended to imply that materials having the same designation give necessarily the same performance. This part of ISO 8257 does not provide engineering data, performance data or data on processing conditions which may be required to specify a material for a particular application and/or method of processing. If such additional properties are required, they shall be determined in accordance with the methods specified in part 2 of this International Standard, if suitable. 1.5 In order to specify a thermoplastic material for a particular application or to ensure reproducible processing, additional requirements may be given in data block 5 (see clause 3, introductory paragraph).
1.1 This part of ISO 8257 establishes a system of designation for poly(methyl methacrylate) (PMMA) thermoplastic materials, which may be used as the basis for specifications.
1.2 The types of PMMA plastics are differentiated from each other by the classification system based on appropriate levels of the designatory properties
a) Vicat softening temperature,
b) melt mass-flow rate,
c) viscosity number (optional),
and on information about intended application and/or method of processing, important properties, additives and colorants.
1.3 This part of ISO 8257 is applicable to all poly(methyl methacrylate) homopolymers and to copolymers of methyl methacrylate (MMA) containing at least 80 % (m/m) of MMA and not more than 20 % (m/m) of acrylic esters or other monomers.
It applies to materials ready for normal use in the form of beads, granules and pellets and to materials unmodified or modified by colorants, additives, etc.
This part of ISO 8257 does not apply to PMMA modified with elastomers.
1.4 It is not intended to imply that materials having the same designation give necessarily the same performance. This part of ISO 8257 does not provide engineering data, performance data or data on processing conditions which may be required to specify a material for a particular application and/or method of processing.
If such additional properties are required, they shall be determined in accordance with the methods specified in part 2 of this International Standard, if suitable.
1.5 In order to specify a thermoplastic material for a particular application or to ensure reproducible processing, additional requirements may be given in data block 5 (see clause 3, introductory paragraph).
La présente norme décrit et explicite le système de désignation des résines de poly(méthacrylate de méthyle) (PMMA) pour moulage et extrusion, sur la base du système de désignation international utilisé en TC 61. La désignation comprend quatre parties comprenant respectivement et successivement : le symbole, l'application envisagée ou le procédé de transformation, les caractéristiques essentielles, les propriétés de désignation. Pour les trois dernières parties, les informations sont codées à l'aide de lettres ou de chiffres dont les significations sont précisées dans la norme. Les éléments déterminants qui permettent de lire la désignation sont la référence de la norme en tête, puis l'ordre dans lequel se succèdent les lettres et les chiffres.
<p>This document establishes a system of designation for poly(methyl methacrylate) (PMMA) thermoplastic material, which can be used as the basis for specifications.</p> <p>The types of PMMA plastic are differentiated from each other by a classification system based on appropriate levels of the designatory properties:</p> <p>a) Vicat softening temperature;</p> <p>b) melt mass-flow rate;</p> <p>c) viscosity number (optional);</p> <p>and on information about the intended application and/or method of processing, important properties, additives and colorants.</p> <p>This document is applicable to all poly(methyl methacrylate) homopolymers and to copolymers of methyl methacrylate (MMA) containing at least a mass percentage of 80 % of MMA and not more than a mass percentage of 20 % of acrylic esters or other monomers.</p> <p>This document applies to materials ready for normal use in the form of beads, granules and pellets and to materials unmodified or modified by colorants, additives, etc. It does not apply to PMMA modified with elastomers.</p> <p>It is not intended to imply that materials having the same designation give necessarily the same performance. This document does not provide engineering data, performance data or data on processing conditions which might be required to specify a material for a particular application and/or method of processing.</p> <p>If such additional properties are required, they are, if suitable, determined using the test methods specified in ISO 24026-2.</p> <p>In order to specify a thermoplastic material for a particular application or to ensure reproducible processing, additional requirements can be given in data block 5 (see 4.1).</p>
COBAZ is the simple and effective solution to meet the normative needs related to your activity, in France and abroad.
Available by subscription, CObaz is THE modular solution to compose according to your needs today and tomorrow. Quickly discover CObaz!
Request your free, no-obligation live demo
I discover COBAZ