ISO 20029-2:2017
Plastics — Thermoplastic polyester/ester and polyether/ester elastomers for moulding and extrusion — Part 2: Preparation of test specimens and determination of properties
Plastics — Thermoplastic polyester/ester and polyether/ester elastomers for moulding and extrusion — Part 2: Preparation of test specimens and determination of properties
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 17
- Дата публикации:
- 5 декабря 2017 г.
- Издание:
- ISO IS 20029 edition 1 version 1
- ICS:
- 83.080.20
ISO 20029-2:2017 specifies the methods of preparation of test specimens and the standard test methods to be used in determining the properties of thermoplastic polyester/ester and polyether/ester elastomer moulding and extrusion materials. Requirements for handling test material and/or conditioning both the test material before moulding and the specimens before testing are given. Procedures and conditions for the preparation of test specimens in a specified state and procedures for measuring properties of the materials from which these specimens are made are given. Properties and test methods which are suitable and necessary to characterize thermoplastic polyester/ester and polyether/ester moulding and extrusion materials are listed. The properties have been selected from the general test methods in ISO 10350‑1. Other test methods in wide use for or of particular significance to these moulding and extrusion materials are also included in this document, as are the designatory properties specified in ISO 20029‑1 (hardness, melting temperature and tensile/flexural modulus). In order to obtain reproducible and comparable test results, it is intended to use the methods of preparation and conditioning, the specimen dimensions and the test procedures specified in this document. Values determined will not necessarily be identical to those obtained using specimens of different dimensions or prepared using different procedures. ISO 20029-2:2017 has been developed on the basis of ISO 10350‑1, as at the moment, no standard exists for the acquisition and presentation of comparable single-point data for thermoplastic elastomers. After publication of this document and the analogous document for polyurethanes (ISO 16365‑2), it is the intention to develop ISO 10350‑3 for the acquisition and presentation of comparable single-point data for thermoplastic elastomers, based on this document and ISO 16365‑2, as the basis for the development of thermoplastic-elastomer material standards.
Abstract
Overview
ISO 20029-2:2017 specifies the preparation of test specimens and the standard test methods for thermoplastic polyester/ester and polyether/ester elastomers intended for moulding and extrusion. The standard defines handling and conditioning requirements for raw material and specimens, procedures to produce specimens in a specified state (notably by injection moulding), and lists the properties and test methods necessary to characterise these thermoplastic elastomer (TPE) materials. Methods are aligned with general test-method sources (for example ISO 10350‑1) and the designatory properties defined in ISO 20029‑1.
Key technical topics and requirements
- Material treatment before moulding
- Moisture content of the sample shall not exceed 0.05% (mass).
- Recommended drying (examples from standard): vacuum oven with N2 purge at 80 °C to 135 °C; other dryers 80 °C to 120 °C depending on dryer type.
- Injection moulding of specimens
- Specimens shall be injection-moulded from dry granules and processed under consistent conditions.
- Typical moulding temperature recommendations and processing ranges are provided (mould, melt, nozzle, heating-zone temperatures) together with ranges for injection pressure (10–100 MPa), holding pressure (10–100 MPa), back pressure (0.5–2 MPa) and injection velocity (100–300 mm/s).
- Specimen conditioning
- Mechanical, electrical and density tests: condition specimens at least 16 h at (23 ± 2) °C and (50 ± 10) % RH.
- Property selection and classification
- Properties drawn from ISO 10350‑1 plus other widely used methods; materials are classified by Shore D hardness into three classes (D ≤ 25; 25 < D ≤ 65; D > 65) with standard and special properties per class.
- Reproducibility
- Use specified specimen dimensions (ISO 20753 where relevant), preparation and testing procedures to obtain comparable single‑point data.
Practical applications and users
- Intended for materials engineers, R&D and QA laboratories, test houses, and manufacturers of TPE compounds and articles produced by moulding or extrusion.
- Useful for specification writing, supplier data sheets, material selection, quality control, and comparative material evaluation.
- Supports development of material standards and consolidated single‑point data for thermoplastic elastomers (informing future work such as ISO 10350‑3).
Related standards
- ISO 20029-1 - designation system and basis for specification
- ISO 10350-1 - general test-methods for single‑point data
- ISO 294-1 / ISO 3167 / ISO 20753 - specimen moulding and dimensions
- ISO 15512 - determination of moisture content
- ISO 868, ISO 527-2, ISO 1133-2 and other referenced ISO/IEC standards for hardness, tensile, melt flow and electrical properties
Keywords: ISO 20029-2:2017, thermoplastic polyester/ester elastomers, polyether/ester elastomers, test specimens, injection moulding, conditioning, Shore D hardness, ISO 10350-1, material testing.
Технические детали
- Технический комитет
- ISO/TC 61/SC 9 - Thermoplastic materials
- SKU
- ISO 20029-2:2017
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