GB/T 4893.4-2023Test of surface coating of furniture—Part 4:Determination of adhesion by cross-cut (English PDF)

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents" Drafting.

This document is Part 4 of GB/T 4893 "Physical and Chemical Properties Testing of Furniture Surface Paint Films". GB/T 4893 has released the following part.

---Part 1. Determination of resistance to cold liquids;

---Part 2. Determination of heat and moisture resistance;

---Part 3. Determination of dry heat resistance;

---Part 4. Adhesion cross-cutting determination method;

---Part 5. Thickness determination method;

---Part 6. Gloss determination method;

---Part 7. Determination of resistance to hot and cold temperature difference;

---Part 8. Determination of wear resistance;

---Part 9. Impact resistance determination method.

This document replaces GB/T 4893.4-2013 "Physical and chemical properties testing of furniture surface paint films - Part 4: Adhesion cross-cutting determination "Law", compared with GB/T 4893.4-2013, in addition to structural adjustments and editorial changes, the main technical changes are as follows:

a) Changed the scope (see Chapter 1, Chapter 1 of the 2013 edition);

b) The normative reference documents have been changed (see Chapter 2, Chapter 2 of the 2013 edition);

c) Added principles (see Chapter 4);

d) Changed the general requirements (see 5.1.1, 3.2.1 of the 2013 version);

e) Changed the single-edged cutting tool (see 5.1.2, 3.2.2 of the 2013 version);

f) Changed the multi-blade cutting tool (see 5.1.3, 3.2.3 of the 2013 version);

g) The spacing guide device has been changed (see 5.2, 3.3 of the 2013 edition);

h) Sampling has been changed (see 6.1, Chapter 4 of the 2013 edition);

i) The base material has been changed (see 6.2, 5.1 of the 2013 version);

j) Changed the paint film thickness (see 6.3, 5.3 of the 2013 edition);

k) The sample requirements are deleted (see 5.2 of the 2013 edition);

l) Changed the preprocessing conditions (see 7.1.1, 6.1.2 of the 2013 version);

m) The test conditions have been changed (see 7.1.2, 6.1.1 of the 2013 edition);

n) Changed the cutting number (see 7.1.3, 6.1.3 of the 2013 version);

o) Changed the cutting spacing (see 7.1.4, 6.1.4 of the 2013 version);

p) The number of measurements has been changed (see 7.1.5, 6.1.5 of the 2013 version);

q) The use of electric-driven tools to cut paint films has been deleted (see 6.3 of the 2013 edition);

r) Changed the result assessment (see Chapter 8, Chapter 7 of the 2013 edition);

s) Added test report (see Chapter 9);

t) Added steps to remove coating debris (see Appendix A).

Introduction

The physical and chemical properties of the paint film on the furniture surface include resistance to cold liquids, resistance to moisture and heat, resistance to dry heat, adhesion, thickness, gloss, resistance to hot and cold temperature differences, abrasion resistance and Impact, etc., due to the large content, GB/T 4893 consists of nine parts.

---Part 1. Determination of resistance to cold liquids. The purpose is to specify the method for determining the resistance of paint films on furniture surfaces to cold liquids.

---Part 2. Determination of heat and moisture resistance. The purpose is to specify the method for determining the moisture and heat resistance of paint films on furniture surfaces.

---Part 3. Determination of dry heat resistance. The purpose is to specify the method for determining the dry heat resistance of paint films on furniture surfaces.

---Part 4. Adhesion cross-cut determination method. The purpose is to specify the method for cross-cut determination of paint film adhesion on furniture surfaces.

---Part 5. Thickness determination method. The purpose is to specify the method for measuring the thickness of paint film on furniture surfaces.

---Part 6. Gloss determination method. The purpose is to specify the method for measuring the gloss of paint films on furniture surfaces.

---Part 7. Determination of resistance to hot and cold temperature difference. The purpose is to specify the method for determining the resistance of paint films on furniture surfaces to hot and cold temperature differences.

---Part 8. Determination of wear resistance. The purpose is to specify the method for determining the abrasion resistance of paint films on furniture surfaces.

---Part 9. Impact resistance determination method. The purpose is to specify the method for determining the impact resistance of paint films on furniture surfaces.

This document is Part 4 of GB/T 4893. It specifies the measurement method for adhesion cross-cutting. It is mainly used to simulate real life and evaluate The anti-separation ability of the paint film and the substrate provides technical support for improving the surface quality of furniture, standardizing the order of the furniture market, and protecting consumers. Provide technical protection for legitimate rights and interests.

1 Scope

This document describes a test method for determining the adhesion of paint films to furniture surfaces.

This document is applicable to the cured surface of painted furniture and tests conducted on unused furniture or test sample surfaces.

This document does not apply to paint films with a total thickness greater than 250 µm, nor to uneven paint films.

2 Normative reference documents

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

GB/T 2792-2014 Test method for peel strength of adhesive tapes

GB/T 4893.5 Physical and chemical properties testing of household surface paint films - Part 5: Thickness determination method

GB/T 37356 Lighting conditions and methods for visual evaluation of paint and varnish coatings

GB/T 37361 Determination of paint film thickness ultrasonic thickness gauge method

3 Terms and definitions

There are no terms or definitions to be defined in this document.

4 Principles

Cut at least 6 parallel cuts on the paint film on the furniture surface, and cut another equal number of cuts perpendicular to the first cut. incision. Remove any loose and flaking coating debris, then visually inspect the cut area and compare to an example of a Grade 6 grading result. Determine the adhesion rating.

5 Instruments and Equipment