GB/T 4893.7-2013 English PDF

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GB/T 4893.7-2013: Test of surface coatings of furniture -- Part 7: Determination of surface resistance to alternation of heat and cold
Status: Valid

GB/T 4893.7: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 4893.7-2013	169	Add to Cart	3 days	Test of surface coatings of furniture -- Part 7: Determination of surface resistance to alternation of heat and cold	Valid
GB/T 4893.7-1985	70	Add to Cart	Auto, < 3 mins	Furniture--Assessment of surface resistance to alternation of heat and cold	Obsolete

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GB/T 4893.1   GB/T 4893.2   GB/T 4893.3   GB/T 4893.10   GB/T 4893.8   GB/T 4893.4   

Basic data

Standard ID: GB/T 4893.7-2013 (GB/T4893.7-2013)
Description (Translated English): Test of surface coatings of furniture -- Part 7: Determination of surface resistance to alternation of heat and cold
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: Y80
Classification of International Standard: 97.140
Word Count Estimation: 7,710
Older Standard (superseded by this standard): GB/T 4893.7-1985
Regulation (derived from): National Standards Bulletin No. 21 of 2013
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary: This standard specifies: wooden pieces of furniture surface resistance to heat and cold performance test methods. This standard applies to: Determination of wooden furniture in the surface film resistance to hot and cold temperature performance.

GB/T 4893.7-2013: Test of surface coatings of furniture -- Part 7: Determination of surface resistance to alternation of heat and cold

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Test of surface coatings of furniture Part 7.. Determination of surface resistance to alternation of heat and cold ICS 97.140 Y80 National Standards of People's Republic of China Replacing GB/T 4893.7-1985 Furniture surface coating physical and chemical properties test Part 7. Determination of resistance to heat and cold Testofsurfacecoatingsoffurniture-Part 7. Determinationof Issued on. 2013-10-10 2014-05-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

GB/T 4893 "Test physical and chemical properties of surface coatings of furniture" is divided into nine sections. --- Part 1. Determination of resistance to cold liquids; --- Part 2. Determination of resistance to heat; --- Part 3. Determination of dry heat resistance; --- Part 4. cross-cut adhesion assay; --- Part 5. Determination of thickness; --- Part 6. Determination of luster; --- Part 7. Determination of resistance to heat and cold; --- Part 8. Determination of abrasion resistance; --- Part 9. Determination of impact. This section GB/T 4893 Part 7. This section drafted in accordance with GB/T 1.1-2009 given rules. This Part replaces GB/T 4893.7-1985 "furniture surface resistance to heat and cold assay", compared with the GB/T 4893.7-1985 The main technical changes are as follows. --- Increasing the range (see Chapter 1); --- Modify the materials and equipment, removed the refrigerator temperature, balance, increased aluminum foil tape, dry cotton cloth (see Chapter 2); --- Modify the sample requirements, sample before coating after the completion of the storage time of the sample and test requirements have been modified to delete the sample delivery Sample reporting requirements should be included (see Chapter 3); --- Modify the test conditions and steps to increase the sample pretreatment requirements, increasing the foil tape edge to determine the sample It puts way to reduce the relative humidity, high temperature test (see Chapter 4); --- Increase the test results and evaluation (see Chapter 5); --- Remove the test results evaluation and test report (see the 1985 edition of Chapter 5). Please note that some of the content of this document may involve patents. Release mechanism of the present document does not assume responsibility for the identification of these patents. This part is proposed by the China Light Industry Federation. This part of the furniture by the National Standardization Technical Committee (SAC/TC480) centralized. This part mainly drafted by. Zhejiang Furniture & Hardware Institute, Shanghai Institute of Quality Supervision, Inspection, Zhongshan City, Guangdong Province Quality Supervision, Inspection, Jiangsu Province Product Quality Supervision and Inspection Institute, Foshan Bondlye Paint Co., Bauhinia paints (on Sea) Limited, Guangdong Federal Furniture Holdings Limited. The main drafters of this section. Zhao Xingang, Jiang Jun, Gu Ming, Li Dehua, Mega Liang, Zhu Yuhong, Huang Haozhe, Lu Zhongqi, Suyue Xiao, Chen Jiwen, Yang Xiaoping, Zhoushan Lin. This part of the standard replaces the previous release case. --- GB/T 4893.7-1985. Furniture surface coating physical and chemical properties test Part 7. Determination of resistance to heat and cold

1 Scope

GB/T 4893 provisions of this part of the test method for wood pieces of furniture surface resistance to heat and cold performance. This section applies to the determination of wooden furniture in the surface film of heat and cold resistance performance. Materials and equipment 2.1 temperature and humidity chamber. Accuracy ± 1 ℃. 2.2 four times the magnifying glass. 2.3 edge materials. aluminum foil tape or flat brush temples, paraffin wax and rosin. 2.4 furnace. 2.5 dry cotton cloth.

3 Sample Requirements

3.1 Sample size 250mm × 200mm. After finishing the specimen shall not be less than 15 ℃ temperature environment placed ventilation after 7d experimenting. May also be in the rear has been completely dried finished furniture directly test specimen preparation. 3.2 Number of samples of four. 3 a test, a comparison. 3.3 specimen surface smooth, no bubble, scratches, faded, wrinkled skin and other defects.

4 Test conditions and procedures

4.1 Pretreatment Before the test specimen shall be at a temperature of 20 ℃ ± 2 ℃, relative humidity of 60% to 70% for pre-processing 24h. 4.2 Test cycle Should be based on the requirements of product standards or determine supply and demand side, the absence of special provisions, the recommended temperature is 40 ℃ ± 2 ℃, relative humidity 95% ± 3% and -20 ℃ ± 2 ℃; with 3 cycles. 4.3 Determination 4.3.1 Edge material with predetermined sides and back of the sample seal. The use of paraffin wax - rosin mixture Edge, the mixing ratio of 1.1. 4.3.2 specimens should be placed inside the constant temperature and humidity level. 4.3.3 a test cycle consists of two phases. The first stage. temperature 40 ℃ ± 2 ℃, relative humidity of 95% ± 3%, 1h; the second stage Section. Cold -20 ℃ ± 2 ℃, 1h. High and low temperature transfer time shall not exceed 2min. After the test at the end of 4.3.4, the sample at 20 ℃ ± 2 ℃, relative humidity of 60% to 70% of the conditions placed 18h, dry with a clean cotton cloth Cleaning the surface to be checked. ......

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