BS EN ISO 24026-1:2020 pdf free.Plastics一Poly(methyl methacrylate) (PMMA) moulding and extrusion materials.
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 1043-1, Plastics 一Symbols and abbreviated terms 一Part 1: Basic polymers and their special characteristics ISO 24026-2， Plastics- Poly(methyl methacrylate) (PMMA) moulding and extrusion materials-Part 2:Preparation of test specimens and determination of properties。The designation consists of an optional description block, reading “Thermoplastics”, and an identity block comprising the International Standard number and an individual-item block. For unambiguous designation, the individual-item block is subdivided into five data blocks comprising the following information: Data block 1: Identification of the plastic by its symbol PMMA in accordance with ISO 1043-1 (see 4.2). Data block 2:  Fillers or reinforcing materials and their nominal content (not included in this document) (see 4.3). Data block 3: Position 1: Intended application or method of processing (see 4.4). Positions 2 to 8: Important properties, additives and supplementary information (see 4.4). Data block 4:  Designatory properties (see 4.5).  Data block 5:  For the purpose of alternative specifications, a fifth data block may be added containing additional information. The first character of the individual-item block shall be a hyphen. The data blocks shall be separated from each other by commas. If a data block is not used, this shall be indicated by doubling the separation sign, i.e. by two commas.In this data block, the range of the Vicat softening temperature is represented by a three-figure code-number (see 4.5.2), the melt mass-flow rate by a three-figure code-number (see 4.5.3) and, optionally, the viscosity number by a two-figure code-number (see 4.5.4). The two (or three) code-numbers, are separated from each other by a hyphen. If a property value falls on or near a range limit, the manufacturer shall state which range designates the material. If subsequent individual test values lie on, or either side of, the range limit because of manufacturing tolerances, the designation is not affected. NOTE Not all the combinations of values of the designatory properties are available with currently offered polymers.BS EN ISO 24026-1 pdf download.