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Standard Classification System for and Basis of Specification for Poly(Methyl Methacrylate) (PMMA) Molding and Extrusion Materials
ASTM D788-24
Organization:
ASTM - ASTM International
Year: 2024
Abstract: The purpose of this classification system is to provide a method of adequately identifying poly(methyl methacrylate) (PMMA) molding and extrusion compounds. These compounds are polymers based on methyl methacrylate, and at least 70 % of the polymer shall be polymerized from methyl methacrylate. Poly(methyl methacrylate) molding and extrusion compounds are classified into groups in accordance with their composition. These groups are subdivided into classes and grades: class 1, 2, 3, and 4; grade 1 - materials used where special ultraviolet transmission, filtering, or stabilization characteristics are not required, grade 2 - materials used for those specialized applications in which the greatest amount of transmission of UV light is required, and grade 3 - materials (transparent UV stabilized or transparent UV absorbing) used when either special resistance to slight color change over long exposure times or high-intensity UV radiation is required, or when the material is required to filter out ultraviolet light. The plastics composition shall be uniform and shall conform to the requirements specified.
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Standard Classification System for and Basis of Specification for Poly(Methyl Methacrylate) (PMMA) Molding and Extrusion Materials
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| contributor author | ASTM - ASTM International | |
| date accessioned | 2025-09-30T18:08:20Z | |
| date available | 2025-09-30T18:08:20Z | |
| date copyright | 2024 | |
| date issued | 2024 | |
| identifier other | d0788-24.pdf | |
| identifier uri | https://yse.yabesh.ir/std/handle/yse/342672 | |
| description abstract | The purpose of this classification system is to provide a method of adequately identifying poly(methyl methacrylate) (PMMA) molding and extrusion compounds. These compounds are polymers based on methyl methacrylate, and at least 70 % of the polymer shall be polymerized from methyl methacrylate. Poly(methyl methacrylate) molding and extrusion compounds are classified into groups in accordance with their composition. These groups are subdivided into classes and grades: class 1, 2, 3, and 4; grade 1 - materials used where special ultraviolet transmission, filtering, or stabilization characteristics are not required, grade 2 - materials used for those specialized applications in which the greatest amount of transmission of UV light is required, and grade 3 - materials (transparent UV stabilized or transparent UV absorbing) used when either special resistance to slight color change over long exposure times or high-intensity UV radiation is required, or when the material is required to filter out ultraviolet light. The plastics composition shall be uniform and shall conform to the requirements specified. | |
| language | English | |
| title | Standard Classification System for and Basis of Specification for Poly(Methyl Methacrylate) (PMMA) Molding and Extrusion Materials | en |
| title | ASTM D788-24 | num |
| type | standard | |
| status | Active | |
| tree | ASTM - ASTM International:;2024 | |
| contenttype | fulltext | |
| scope | 1.1 This classification system covers poly(methyl methacrylate) molding and extrusion compounds. These compounds are polymers based on methyl methacrylate, and at least 70 % of the polymer shall be polymerized from methyl methacrylate. 1.2 The properties included in this standard are those required to identify the compositions covered. Other requirements necessary to identify particular characteristics important to specialized applications are to be specified by using suffixes as given in Section 5. 1.3 Acrylic molding and extrusion compounds are used frequently in applications where extreme clarity and the ability to retain that clarity and color under severe weathering and other environmental exposures are of primary significance. While the test specimen properties of this document extend to the evaluation of nonvirgin materials, the user must take precautions to ensure that parts made from these materials meet the desired end-use requirements. Accordingly, this specification allows for the use of those acrylic plastic materials that can be recycled, reconstituted, and reground provided the following: 1.3.1 The requirements as stated in this specification are met, and 1.3.2 The requirements of the particular end-use application are met. 1.4 This classification system and subsequent line callout (specification) are intended to provide a means of calling out plastic materials used in the fabrication of end items or parts. It is not intended for the selection of materials. Material selection can be made by those having expertise in the plastics field only after careful consideration of the design and the performance required of the part, the environment to which it will be exposed, the fabrication process to be employed, the costs involved, and the inherent properties of the material other than those covered by this standard. Note 1: This classification system is similar to ISO 24026–1 in title only. The technical content is significantly different. 1.5 The values stated in SI units are to be regarded as standard. 1.6 The following precautionary caveat pertains only to the test method portion, Section 11, of this classification system: This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. | |
| identifier DOI | 10.1520/D0788-24 |