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GB/T 41878-2022Plastics - Determination of scratch properties (English PDF)

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Issued by

State Administration for Market Regulation, China National Standardization Administration

Level / Type

National · Recommended

Issue date

October 12, 2022

Implementation date

October 12, 2022

Scope

GB/T 41878-2022 (Plastics - Determination of scratch properties) is available as an English-translated PDF.

GB/T 41878-2022 is the Chinese standard "Plastics - Determination of scratch properties". Its scope clause reads: This document specifies the test methods for the scratch performance of plastics under given conditions, including the formation of scratches and the evaluation of the results and test specimens.

Optimum size and optimal geometry of the shaving head. This document is suitable for characterizing the scratching behavior of a specific type of specimen under given scratching conditions.

This document applies to uncoated and unpainted thermoplastic molding materials and thermoset molding materials. Its clauses include terms and definitions.

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Document preview — GB/T 41878-2022

National Standard of the People's Republic of China

ICS: 83.080.01
Classification: G 31

Issued by: State Administration for Market Regulation, China National Standardization Administration

Preface
Introduction
1 Scope
2 Normative references
3 Terms and Definitions
4 Principle
5 Device
5.1 Scratch measuring equipment
5.1.1 General requirements
5.1.2 Test platform
5.1.3 Scraper
5.1.4 Test load
5.1.5 Test speed
5.1.6 Specimen holder
5.1.7 Force sensor
5.1.8 Scraper Displacement Extensometer
5.2 Specimen size measuring equipment
5.3 Video recording and inspection equipment (optional)
5.3.1 Video recording equipment
5.3.2 Checking equipment
6 Sample
6.1 Specimen shape and dimensions
6.2 Specimen Preparation
6.3 Specimen Inspection
6.4 Number of samples
6.5 Sample state adjustment
7 Test Step
7.1 Test Environment
7.2 Test preparation
7.2.1 Inspection of the scraper
7.2.2 Measurement of specimen dimensions
7.2.3 Selection of test load
7.2.4 Selection of test speed
7.2.5 Total scratch distance
7.2.6 Specimen fixation
7.3 Test
8 The result indicates
8.1 Scratch damage form
8.2 Scratch phase diagram
8.3 Critical normal loads
9 Test report
Appendix A (Informative) Structure Number Comparison List
Appendix B (Informative) Schematic Diagram of Scratch Damage Mode
Appendix C (Informative) Schematic Diagram of Scratch Measurement Equipment

1 Scope

This document specifies the test methods for the scratch performance of plastics under given conditions, including the formation of scratches and the evaluation of the results and test specimens.

Optimum size and optimal geometry of the shaving head.

This document is suitable for characterizing the scratching behavior of a specific type of specimen under given scratching conditions.

This document applies to uncoated and unpainted thermoplastic molding materials and thermoset molding materials.

2 Normative references

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, dated citations documents, only the version corresponding to that date applies to this document; for undated references, the latest edition (including all amendments) applies to this document.

GB/T 2918 Standard Environment for Conditioning and Testing of Plastic Specimens (GB/T 2918-2018, ISO 291.2008, MOD)

GB/T 17037.1 Preparation of injection-molded specimens for plastic thermoplastic materials - Part 1.General principles and multi-purpose specimens and lengths

Preparation of strip samples (GB/T 17037.1-2009, ISO 294-1.2017, MOD)

GB/T 17037.5 Preparation of injection-molded specimens for plastic thermoplastic materials - Part 5.Standard specimens for evaluation of anisotropy

Preparation (GB/T 17037.5-2020, ISO 294-5.2017, MOD)

GB/T 37426 Plastic samples (GB/T 37426-2019, ISO 20753.2018, MOD)

ISO 472.2013 Plastics terms and their definitions (Plastics-Vocabulary)

ISO 10724-1 Preparation of injection-molded test specimens for plastic thermosetting powder molding compounds (PMCs) - Part 1.General principles and details

3 Terms and Definitions

ISO 472.2013 and the following terms and definitions apply to this document.

3.1 scratches

Given the shape of the scraper, the test load, and the test speed, the scraper will cause damage to the sample surface when the scraper moves on the sample surface.

Note. "Surface" refers to the surface of the macroscopic scale rather than the surface of the microscopic scale.

3.2 test load

During the test, the force applied by the scraper perpendicularly to the surface of the sample.

Note. The unit is Newton (N).

3.3 test speed

During the test, the relative displacement speed of the scraper and the sample.

Note. in millimeters per second (mm/s).

GB/T 41682 | GB/T 41758.2 | GB/T 41879 | GB/T 41877.2 | […]

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 44 pages — is available in the English PDF.

Referenced standards

Normative references

ISO 291.2008 · ISO 294 · ISO 20753.2018 · ISO 472.2013 · ISO 10724

Cited by

GB/T 44303-2024Plastics - Quantitative evaluation of scratch-induced damage and scratch visibility

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