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GB/T 34676-2017

Chinese Standard: 'GB/T 34676-2017'
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Detail Information of GB/T 34676-2017; GB/T34676-2017
Description (Translated English): Interior wall coatings for children's room decorating
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: G50
Classification of International Standard: 87.040
Word Count Estimation: 10,122
Date of Issue: 2017-11-01
Date of Implementation: 2018-05-01
Drafting Organization: Carpoly Chemicals Group Co., Ltd., CNOOC Changzhou Coating Chemical Research Institute Co., Ltd., Dow Chemical (China) Investment Co., Ltd., Nippon Paint (China) Co., Ltd., Akzo Nobel Swire Paints Ltd., BASF (China) Co., Ltd., China Building Materials Inspection and Certification Group Co., Ltd., Barclays Chemical Co., Ltd., Bauhinia Paints (Shanghai) Co., Ltd., China Lacquer (Shenzhen) Co., Ltd., Foshan City Shunde District Badi Fu Industrial Co., Ltd., Guangdong Huarun Coatings Co., Ltd., Shenzhen Guangtian Environmental Coatings Co., Ltd., Hezhong (Foshan) Chemical Co., Ltd., Hebei Chenyang Industry and Trade Group Co., Ltd., Zhejiang Nami New Materials Co., Ltd. Company, Zhejiang Zhiqiang Paint Co., Ltd., Wanhua Chemical Set
Administrative Organization: National Coatings and Pigments Standardization Technical Committee (SAC/TC 5)
Proposing organization: China Petroleum and Chemical Industry Federation
Issuing agency(ies): People's Republic of China General Administration of Quality Supervision, Inspection and Quarantine, China National Standardization Administration

GB/T 34676-2017
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 87.040
G 50
Interior wall coatings for children’s room decorating
儿童房装饰用内墙涂料
ISSUED ON. NOVEMBER 01, 2017
IMPLEMENTED ON. MAY 01, 2018
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative references ... 4 
3 Terms and definitions ... 5 
4 Product classification ... 6 
5 Requirements ... 6 
6 Test methods ... 7 
7 Inspection rules ... 12 
8 Marking, packaging and storage ... 13 
Interior wall coatings for children’s room decorating
1 Scope
This standard specifies the terms and definitions, product classification,
requirements, test methods, inspection rules and markings, packaging and
storage of interior wall coatings for children's room decoration.
This standard is applicable to interior wall coatings which are prepared by using
synthetic resin emulsion as base material, as well as pigments, extender
pigments and various additives, and which, after application, can form a thin
surface coating with smooth surface, including topcoat and primer. This product
is mainly used for interior wall decoration of children's rooms, kindergartens and
other children's activity places.
2 Normative references
The following documents are essential to the application of this document. For
the dated documents, only the versions with the dates indicated are applicable
to this document; for the undated documents, only the latest version (including
all the amendments) are applicable to this standard.
GB/T 1728-1979 Methods of test for drying time of coatings of paints and
putties
GB/T 1766-2008 Paints and varnishes - Rating schemes of degradation of
coats
GB/T 3186 Paints varnishes and raw materials for paints and varnishes -
Sampling
GB/T 6682-2008 Water for analytical laboratory use - Specification and test
methods
GB/T 6750-2007 Paints and varnishes - Determination of density -
Pyknometer method
GB/T 8170-2008 Rules of rounding off for numerical values & expression
and judgement of limiting values
GB/T 9265-2009 Determination for alkali resistance of film of - Architectural
paints and coatings
Unless otherwise agreed, the substrate shall be selected in accordance with
Tables 3 and 5. For the contrast ratio item, use polyester film or card paper that
meets the requirements of 4.4 of GB/T 23981-2009; the comprehensive
scrubbing resistance and stain resistance item uses PVC plastic material that
meets the requirements of C.3.2.6 of GB/T 9755-2014. The anti-alkaline item
uses non-asbestos fiber reinforced cement MDF that meets the requirements
of A.1.3 of GB/T 9756-2009; the rest of the items use non-asbestos cement slab
that meets the requirements of NAF H grade V in JC/T 412.1-2006. The
treatment of non-asbestos cement slabs shall be carried out in accordance with
the provisions of GB/T 9271.
6.4 Preparation of test panel
6.4.1 Specimen preparation
When the product to be inspected is not clearly indicated of the dilution ratio,
stir it evenly and then make a slab. When the product to be inspected indicates
the dilution ratio, except for the contrast ratio item, for all the items that need to
be tested by preparing slab, it shall prepare the slab after mixing it uniformly in
accordance with the specified dilution ratio. If the ratio is a certain range, it shall
take the middle value.
6.4.2 Preparation of primer test panel
6.4.2.1 The primer panel is made by brushing method. Each sample is first
measured for density D in accordance with the provisions of GB/T 6750-2007,
the brushing mass is calculated in accordance with formula (1).
m = D × S × 80 × 10-4 ... (1)
Where.
m - The mass of one course of brushing at a wet film thickness of 80 μm, in
grams (g);
D - The value of the sample density after dilution in accordance with the
specified dilution ratio, in grams per milliliter (g/mL);
S - The value of the test panel area, in square centimeters (cm2).
Mass of each course of brushing. Calculate brushing mass ± 0.1 g.
Due to the low viscosity of some primers, if it is not possible to calculate the
brushing amount for panel preparation, it can appropriately reduce the brushing
mass, but it shall be indicated in the report; due to the high viscosity of some
primers, if it is not possible to calculate the brushing amount for panel
preparation, it can appropriately add water for dilution, it shall indicate the
dilution ratio and the actual brushing mass in the report.
6.5.3.1 Primer workability
Use a brush to apply specimen to the smooth surface of the test panel, if the
brush moves without obstructions, it is rated as “brushing without obstruction”.
6.5.3.2 Finish workability
Use a brush to apply the specimen onto the smooth surface of the test panel,
the brushing amount is controlled such that the wet film thickness is about 100
μm. Place the test panel vertically such that the long side of the test panel is in
horizontal direction and the short side is 85° to the horizontal. After being placed
for 6 hours, use the same method to apply the second course of specimen.
During the second course application, if the brush moves without obstruction, it
is rated as “there is no obstruction in the second course application”.
6.5.4 Drying time
It is performed in accordance with the provisions of Table B of GB/T 1728-1979.
6.5.5 Appearance of paint film
The test panel after the test of 6.5.3 is placed for 24 hours, perform visual
inspection against the coating film, if there is no significant shrinkage cavity and
the coating film is uniform, it is rated as “normal”.
6.5.6 Freeze-thaw resistance
It is performed in accordance with the method A of GB/T 9268-2008.
6.5.7 Alkali resistance <......
Related standard:   GB/T 34675-2017  GB/T 34681-2017
   
 
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