Tiêu chuẩn quốc tế

• Số hiệu / Standard Number: ASTM D5990
• Năm ban hành / Publication date: 2020
• Tình trạng / Status: A - Còn hiệu lực
• Tên tiếng Anh / Title in English: Standard Classification System and Basis for Polyketone Injection Molding and Extrusion Materials (PK)
• Chỉ số phân loại Quốc tế (ICS) / By field: 83.080.20 - Vật liệu dẻo nhiệt
• Số trang / Page: 5

Phạm vi áp dụng / Scope of standard

This classification system covers polyketone materials suitable for injection molding and extrusion. This classification system does not address recycled polyketone materials.

The properties included in this classification system 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.

This classification system and subsequent line call out (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 should be made by those having expertise in the plastic field 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 classification system.

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.

NOTE 1-This classification system and ISO 21970-1 and ISO 21970-2 address the same subject matter, but differ in technical content.

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.

*A Summary of Changes section appears at the end of this standard