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GB/T 30791-2014 English PDF

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GB/T 30791-2014: Paints and varnishes -- T-bend test
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PDF similar to GB/T 30791-2014


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Basic data

Standard ID GB/T 30791-2014 (GB/T30791-2014)
Description (Translated English) Paints and varnishes -- T-bend test
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard G50
Classification of International Standard 87.040
Word Count Estimation 11,161
Date of Issue 7/8/2014
Date of Implementation 12/1/2014
Quoted Standard ISO 1513; ISO 1514; ISO 2808; ISO 15528; IEC 60454-2
Adopted Standard ISO 17132-2007, IDT
Regulation (derived from) 2014 National Standards Bulletin No. 18
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 a case by observing their cracking or flaking paint during the test panel is bent to evaluate organic coating on a metal substrate flexibility and adhesion method. This method can be used to pass/fail test assessed by paint, varnis

GB/T 30791-2014: Paints and varnishes -- T-bend test

---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.
Paints and varnishes. T-bend test ICS 87.040 G50 National Standards of People's Republic of China Paints and varnishes T bend test (ISO 17132.2007, IDT) Issued on. 2014-07-08 2014-12-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This standard was drafted in accordance with GB/T 1.1-2009 given rules. This standard uses the translation method identical with the international standard ISO 17132.2007 "Paints and varnishes T bend test." Correspondence between the consistency of the standards of international documents and normative references of the following documents. --- GB/T 3186-2006 Paints, varnishes and raw materials for paints and varnishes - Sampling (ISO 15528.2000, IDT); --- GB/T 9271-2008 Paints and varnishes standard test panels (ISO 1514.2004, MOD); --- GB/T 13452.2-2008 Paints and varnishes - Determination of film thickness (ISO 2808.2007, IDT); --- GB/T 20777-2006 Paints and varnishes examination and preparation of samples (ISO 1513.1992, IDT). The standard proposed by China Petroleum and Chemical Industry Association. This standard by the National Standardization Technical Committee paint pigment (SAC/TC5) centralized. This standard was drafted. CNOOC Changzhou coating Chemical Research Institute, Taicang Polymer Materials R & D Center Co., Ltd., Shenzhen Hirota loaded Decorative Group Co., Ltd., Nanjing Product Quality Supervision and Inspection Institute, Guangzhou Supe Chemical Co., Ltd., Guangzhou standard laboratory instrument Geda Device supplies Limited. The main drafters of this standard. Chen Feng, Lu Yong, Li Shaojiang Liang Zhi, Li Guorong, Wang Chongwu. Paints and varnishes T bend test

1 Scope

This standard specifies a case by observing their cracking or flaking paint during the test panel is bent to evaluate organic coating on the metal substrate Methods flexibility and adhesion. This method can be used to pass/not assessed by testing paint, varnish or related product meets the test requirements prescribed, or For measuring the crack does not occur in the case of the minimum bend diameter.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein Member. For undated references, the latest edition (including any amendments) applies to this document. ISO 1513 inspection and preparation of samples for paints and varnishes (Paintsandvarnishes-Examinationandpreparation ofsamplesfortesting) Paints and varnishes ISO 1514 standard test panels (Paintsandvarnishes-Standardpanelsfortesting) ISO 2808 Paints and varnishes - Determination of film thickness (Paintsandvarnishes-Determinationoffilmthick- ness) ISO 15528 Paints, varnishes and raw materials for paints and varnishes - Sampling (Paints, varnishesandrawmaterialsfor paintsandvarnishes-Sampling) IEC 60454-2 electrical pressure sensitive tapes - Part 2. Test methods (Specificationforpressure-sensitivead- hesivetapesforelectricalpurposes-Part 2. Methodsoftest)

3 Terms and Definitions

The following terms and definitions apply to this document. 3.1 T bend test T-bendtest The test panels painted by 180 ° bending test to determine the flexibility of the coating properties. 3.2 T bend grade T-bendrating Painted test plate around a predetermined thickness of the spacer are bent, in the case of crack the coating does not occur or loss of adhesion (peeling), and used The minimum number of spacers (or, if it is bent around the shaft rods, the use of the number of spacers corresponds to the shaft diameter of the rod). Principle 4 The painted surfaces curved toward the outside, in order to gradually reduce the radius of curvature of the painted test panels bent 180 °, where the size of the radius of curvature by Spacers or mandrel decision. After the test plate bending, checking each test case coating cracking through a magnifying glass plate and observed by tape tear-off test Coating flaking. In T bend level to represent the case where the coating is not peeling or cracking, that damage can not occur in the test panel is bent The minimum diameter of the song.

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