ISO/TS 19278:2019 PDF

Plastics — Instrumented micro-indentation test for hardness measurement

Название (английский):

ISO/TS 19278:2019

Plastics — Instrumented micro-indentation test for hardness measurement

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 9
Дата публикации:: 1 апреля 2019 г.
Издание:: ISO TS 19278 edition 1 version 1
ICS:: 83.080.01

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Описание (английский):

This document specifies a hardness test method for plastics using instrumented indentation in the micro scale with one clearly defined test condition to ensure reproducibility and comparability of test results. The test method is selectively suitable for use with the following materials: — moulding, extrusion and cast thermoplastic materials; rigid and semi-rigid thermoplastics sheets; — rigid and semi-rigid thermosetting moulding materials; thermosetting sheets. This test method could also be utilized for nanometric filled system, considering the fillers are distributed uniformly in the polymer matrix. This test method allows dumbbell type specimen, strip type specimen, platens and specimen cut from any finished parts or products. This test method is useful for quality control, material selection, and screening of new formulations. NOTE This document does not aim to describe all scientific or technical aspects of microhardness testing on plastics in general.

Технические детали

Технический комитет: ISO/TC 61/SC 2 - Mechanical behavior
SKU: ISO/TS 19278:2019

Abstract

Overview

ISO/TS 19278:2019 - Plastics: Instrumented micro‑indentation test for hardness measurement defines a single, reproducible instrumented micro‑indentation method for measuring the hardness of selected plastics. The specification standardizes test conditions (indenter, force, timing, specimen preparation and environment) so results are comparable across laboratories. It is aimed at moulding, extrusion and cast thermoplastics, rigid/semi‑rigid thermosetting materials and sheets, and can be applied to uniformly nanofilled polymer systems.

Key topics and technical requirements

Test principle: A calibrated Berkovich indenter is forced into the plastic; indentation depth is measured under load and hardness is calculated from the applied force and the contact area derived from indentation depth (see clause 10.1).
Apparatus:
- Original Berkovich indenter per ISO 14577‑1 (calibration per ISO 14577‑2).
- Instrument must record force, displacement and time, compensate for machine compliance and apply the correct indenter area function.
Loading and timing:
- Maximum test force: 500 mN.
- Force application and removal times: 30 s each.
- Hold at maximum force: 40 s.
- Force repeatability: ±1.5%; force application time tolerance ±10%.
Displacement accuracy: Maximum permissible error ±1% of indentation depth when depth > 6 μm.
Specimen requirements:
- Thickness: at least 40 × h_max (to avoid substrate effects).
- Surface roughness Ra ≤ h_max / 20.
- Parallel, untwisted surfaces; minimum spacing between indentations and from free edges ≥ 4 × indentation diameter (cut edges ≥ 10 mm away).
Environment & conditioning: Preferred atmospheric conditions 23 ± 2 °C, 50 ± 10% RH (ISO 291).
Quality assurance: Periodic apparatus checks using control charts and suitable reference materials.

Applications and who uses it

Quality control in manufacturing of plastic parts and sheets.
Material selection and specification for product design (comparing formulations and grades).
R&D and formulation screening, including evaluation of uniformly nanofilled polymers.
Typical users: materials laboratories, plastics manufacturers, testing labs, R&D teams, and third‑party certification bodies.

Related standards

ISO 14577‑1 / ISO 14577‑2 (instrumented indentation for materials)
ISO 291 (conditioning and testing atmospheres)
ISO 4287 (surface texture)
ISO 2602, ISO 294 series, ISO 6507 and ISO 2039 (context and complementary hardness methods)

ISO/TS 19278:2019 helps ensure reproducible, comparable microhardness data for plastics - useful for reliable quality assessment, benchmarking and material development.

Overview

Key topics and technical requirements

Test principle: A calibrated Berkovich indenter is forced into the plastic; indentation depth is measured under load and hardness is calculated from the applied force and the contact area derived from indentation depth (see clause 10.1).
Apparatus:
- Original Berkovich indenter per ISO 14577‑1 (calibration per ISO 14577‑2).
- Instrument must record force, displacement and time, compensate for machine compliance and apply the correct indenter area function.
Loading and timing:
- Maximum test force: 500 mN.
- Force application and removal times: 30 s each.
- Hold at maximum force: 40 s.
- Force repeatability: ±1.5%; force application time tolerance ±10%.
Displacement accuracy: Maximum permissible error ±1% of indentation depth when depth > 6 μm.
Specimen requirements:
- Thickness: at least 40 × h_max (to avoid substrate effects).
- Surface roughness Ra ≤ h_max / 20.
- Parallel, untwisted surfaces; minimum spacing between indentations and from free edges ≥ 4 × indentation diameter (cut edges ≥ 10 mm away).
Environment & conditioning: Preferred atmospheric conditions 23 ± 2 °C, 50 ± 10% RH (ISO 291).
Quality assurance: Periodic apparatus checks using control charts and suitable reference materials.

Applications and who uses it

Quality control in manufacturing of plastic parts and sheets.
Material selection and specification for product design (comparing formulations and grades).
R&D and formulation screening, including evaluation of uniformly nanofilled polymers.
Typical users: materials laboratories, plastics manufacturers, testing labs, R&D teams, and third‑party certification bodies.

Related standards

ISO 14577‑1 / ISO 14577‑2 (instrumented indentation for materials)
ISO 291 (conditioning and testing atmospheres)
ISO 4287 (surface texture)
ISO 2602, ISO 294 series, ISO 6507 and ISO 2039 (context and complementary hardness methods)

ISO/TS 19278:2019 helps ensure reproducible, comparable microhardness data for plastics - useful for reliable quality assessment, benchmarking and material development.

ISO/TS 19278:2019 PDF

Технические детали

Abstract

Overview

Key topics and technical requirements

Applications and who uses it

Related standards

Похожие стандарты

Abstract

Overview

Key topics and technical requirements

Applications and who uses it

Related standards

Похожие стандарты

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