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GB/T 23999-2009Water based coatings for woodenware for indoor decorating and refurbishing (English PDF)

室内装饰装修用水性木器涂料

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

June 2, 2009

Implementation date

February 1, 2010

Scope

GB/T 23999-2009 is the English-translated version of 室内装饰装修用水性木器涂料.

GB/T 23999-2009 is the Chinese standard "Water Based Coatings for Woodenware for Indoor Decorating and Refurbishing".

Its scope clause reads: This Standard specifies the definition, classification, requirements, test methods, inspection rules and packaging mark of water-based coatings for surface decoration and protection of indoor wooden substrates.

This Standard is applicable to polyurethane, acrylic, acrylic-polyurethane and other types of room-temperature dry single-component or bi-component water-based coatings for woodenware.

Its clauses include terms and definitions; classification of products; requirements; test methods; inspection rules; marking, packaging and storage. It was issued by the General Administration of Quality Supervision, Inspection and Quarantine on JUNE 2, 2009 and took effect on FEBRUARY 1, 2010.

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Document preview — GB/T 23999-2009

National Standard of the People's Republic of China

ICS: 87.040
Classification: G 51

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Foreword3
1 Scope4
2 Normative References4
3 Terms and Definitions5
4 Classification of Products5
5 Requirements6
6 Test Methods8
7 Inspection Rules13
8 Marking, Packaging and Storage14
Bibliography15

1 Scope

This Standard specifies the definition, classification, requirements, test methods, inspection rules and packaging mark of water-based coatings for surface decoration and protection of indoor wooden substrates.

This Standard is applicable to polyurethane, acrylic, acrylic-polyurethane and other types of room-temperature dry single-component or bi-component water-based coatings for woodenware.

2 Normative References

Through the reference in this Standard, the clauses of the following documents become clauses of this Standard. In terms of references with a specified date, all the subsequent modification sheets (excluding the corrected content) or revised versions are not applicable to this Standard. However, the various parties that reach an agreement in accordance with this Standard are encouraged to explore the possibility of adopting the latest version of these documents. In terms of references without a specified date, the latest version is applicable to this Standard.

GB/T 1250 Rules for Expression and Judgement of Limiting Values

GB/T 1724 Methods of Test for Fineness of Grind of Paints

GB/T 1725 Paints, Varnishes and Plastics - Determination of Non-volatile-matter Content (GB/T 1725-2007, ISO 3251:2003, IDT)

GB/T 1728-1979 Methods of Test for Drying Time of Coatings of Paints and Putties

GB/T 1766 Paints and Varnishes - Rating Schemes of Degradation of Coats

GB/T 1768 Method of Test for Abrasion Resistance of Paint Films (GB/T 1768-2006, ISO 7784-2:1997, IDT)

GB/T 3186 Paints, Varnishes and Raw Materials for Paints and Varnishes - Sampling (GB/T 3186-2006, ISO 15528:2000, IDT)

GB/T 4893.1-2005 Furniture - Assessment of Surface Resistance to Cold Liquids

GB/T 4893.3-2005 Furniture - Assessment of Surface Resistance to Dry Heat

GB/T 6682-2008 Water for Analytical Laboratory Use - Specification and Test Methods (ISO 3696:1987, MOD)

3 Terms and Definitions

The following terms and definitions are applicable to this Standard.

4 Classification of Products

In accordance with the practical purposes and functions, water-based coatings for woodenware are divided into four types. A, B, C and D, which respectively represent.

5 Requirements

Products shall comply with the requirements of Table 1.

6 Test Methods

6.1 Sampling

Products shall be sampled in accordance with the stipulations of GB/T 3186, or, a method determined through negotiation. The sampling size shall be determined in accordance with the inspection demands.

6.3 Preparation of Test panel

Unless it is otherwise stipulated, all panel-making items panels with a single paint type.

In other words, the panels shall be respectively made with finishing coat or primer.

6.4.6 Freeze-thaw resistance

In accordance with the stipulations of 5.5 in GB/T 9755-2001, conduct the test. For bi-component coating, merely the main agent shall be inspected.

6.4.8 Luster (60°)

In accordance with the stipulations of GB/T 9754, conduct the test.

6.4.9 Polishability

Use 400# water sandpaper to manually polish for 20 times. If the coating film can be easily polished to a flat and smooth surface, then, it shall be evaluated as "easy to polish".

6.4.10 Hardness (scratch)

In accordance with the stipulations of GB/T 6739, conduct the test. The pencil is ZHONGHUA Brand 101 drawing pencil.

6.4.14 Abrasion resistance

In accordance with the stipulations of GB/T 1768, conduct the test. The used model is CS-10 rubber grinding wheel.

6.4.15 Scratch resistance

In accordance with the stipulations of GB/T 9279, conduct the test. On the scratching needle, perform a scratch test with a given load of 100 g. After the test, conduct visual observation of the test panel at an angle of 45° perpendicular to the scratched direction.

If no scratch is identified, then, it shall be evaluated as "unscratched".

6.4.17 Alkali resistance

The test and result evaluation method are the same as the room-temperature water resistance test. The test solution is 50 g/L NaHCO3.The test duration is 1 h. After the test, place it for 1 h, then, observe it.

6.4.20 Resistance to dry heat

In accordance with the stipulations of GB/T 4893.3-2005, conduct the test. The test temperature is (70 ± 2) °C; the test duration is 15 min.

6.4.21 Yellowing resistance

In accordance with the stipulations of GB/T 23987, conduct the test. Use UVA (340) lamp as the light source; place the test panel in a dry phase (non-condensing) fluorescent ultraviolet aging machine whose test conditions can meet.

7 Inspection Rules

7.1 Inspection Classification

7.1.1 Product inspection is divided into exit-factory inspection and type inspection.

7.2 Determination of Inspection Result

7.2.1 The determination of the inspection result shall be conducted in accordance with the rounding-off comparison method in GB/T 1250.

8 Marking, Packaging and Storage

8.1 Marking

Marking shall comply with the stipulations of GB/T 9750. For coatings composed of bi-component, the ratio of each component shall be clarified. If it is necessary to add water for dilution, the dilution ratio shall be clarified.

8.2 Packaging

Packaging shall comply with the stipulations of Level-2 packaging in GB/T 13491. […]

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

Referenced standards

Normative references

GB/T 1250

Cited by

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