ISO 17541:2014 PDF
Plastics — Quantitative evaluation of scratch-induced damage and scratch visibility
Plastics — Quantitative evaluation of scratch-induced damage and scratch visibility
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 17
- Дата публикации:
- 2 сентября 2014 г.
- Издание:
- ISO IS 17541 edition 1 version 1
- ICS:
- 83.080.01
ISO 17541:2014 deals with quantitative evaluation of scratch-induced damage and scratch visibility in polymers. ISO 17541:2014 specifies two methods to assess scratch damage and scratch visibility expressed by three colour coordinates of a 3-D colour model. Method A uses a scratch tip capable of area-contact or line-contact with material surfaces under a constant load condition. It is represented by scratch damage index (SDI). Method B uses a scratch tip capable of line-contact under a linearly increasing load condition. It is represented by scratch visibility index (SVI). The methods are suitable for use with coated and uncoated thermoplastic and thermosetting moulding materials. The methods specify the preferred dimensions of testing specimens and the preferred scratch-tip geometry.
Abstract
Overview - ISO 17541:2014 (Plastics, Scratch Evaluation)
ISO 17541:2014 specifies reproducible, quantitative methods for evaluating scratch‑induced damage and scratch visibility on polymer surfaces (coated or uncoated thermoplastic and thermosetting molding materials). The standard defines two complementary test methods and expresses results using colour‑coordinate metrics from a 3‑D colour model to produce the Scratch Damage Index (SDI) and Scratch Visibility Index (SVI) for objective assessment of scratch resistance and visibility.
Key topics and technical requirements
- Two methods
- Method A (constant load) - area‑ or line‑contact tip under constant normal load; results reported as SDI (degree of damage ΔD or percent luminance change and scratch strength/resistance).
- Method B (increasing load) - line‑contact tip with linearly increasing load; results reported as SVI (intensity, saturation and scratch resistance at onset of visibility).
- Colour metrics - Euclidean distance between colour coordinates (ΔD) and percent difference in luminance (Lnorm) from a 3‑D colour model (HSI components used for visibility determination).
- Scratch tips and materials - preferred tip geometries: Type 1 (area‑contact) and Type 2 (line‑contact). Tip materials: stainless steel or tungsten carbide, hardness > Rockwell HRC 64; surface roughness
Технические детали
- Технический комитет
- ISO/TC 61/SC 2 - Mechanical behavior
- SKU
- ISO 17541:2014
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