GB/T 26392-2011 English PDF

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GB/T 26392-2011: Slow recovery foam -- Determination of recovery time
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 26392-2011	139	Add to Cart	3 days	Slow recovery foam -- Determination of recovery time	Valid

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Basic data

Standard ID: GB/T 26392-2011 (GB/T26392-2011)
Description (Translated English): Slow recovery foam -- Determination of recovery time
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: G32
Classification of International Standard: 83.100
Word Count Estimation: 6,669
Date of Issue: 2011-05-12
Date of Implementation: 2011-09-15
Quoted Standard: GB/T 2918-1998; GB/T 6342-1996
Regulation (derived from): Announcement of Newly Approved National Standards No. 6 of 2011
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 the slow rebound foam recovery time after compression method. This standard applies to slow rebound foam recovery time measurement.

GB/T 26392-2011: Slow recovery foam -- Determination of recovery time

---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.
Slow recovery foam. Determination of recovery time ICS 83.100 G32 National Standards of People's Republic of China Slow rebound foam measured recovery time Issued on. 2011-05-12 2011-09-15 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

The standard reference American Society for Testing and Materials standard ASTMD3574-2008 "flexible porous material block, bonded and molded poly Standard Test Method for urethane foam "recovery time measured in TESTM partially developed, the technical content and ASTMD3574- 2008 TESTM same. The standard proposed by China National Light Industry Council. This standard by the National Standardization Technical Committee of plastic products. This standard was drafted. Jiangsu Institute of Chemical Co., Ltd., Beijing Technology and Business University, Jiangsu Province, polyurethane products quality supervision and inspection stations. The main drafters of this standard. Wu Hao, Chen Qian, Zhang Zhizhong Zhou Nan skullcap, Shen Wei Hua. Slow rebound foam measured recovery time

1 Scope

This standard specifies the method for determination of the recovery time after the slow rebound foam under pressure. This standard applies to the determination of the slow rebound foam recovery time.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard. GB/T 2918-1998 standard plastic sample conditioning and environmental tests (idt ISO 291.1997) GB/T 6342-1996 plastics and rubbers - Determination of linear dimensions (idt ISO 1923. 1981) Principle 3 Slow rebound foam is applied to the sample indentation force, to produce a predetermined deformation, after holding a predetermined time, the measurement sample required basic rehabilitation time.

4 Test Instruments

Instrument uses a 203mm diameter circular flat indenter, through flexible swivel joint is connected with the load measuring device, thereby The instrument can be (1000 ± 100) mm/min sample rate of indentation, thus producing deformation. The instrument has a horizontal supporting plate for supporting the Sample support plate opening has a diameter of about 6.5mm, hole spacing of 20mm, so that the air can be discharged from below the sample during the test.

5 Sample

5.1 Sample Requirements Specimens should be able to meet part of the requirements of the test sample. Arbitration test, at least the production of foam samples 7d or more. 5.2 Sample Size Unless otherwise specified, the sample size should not be less than 380mm × 380mm × 100mm, the thickness of the sample is not equal to 100mm, and should try Indicate the thickness of the sample inspection report. Sample size according to the provisions of GB/T 6342-1996 measure, parallelism tolerance parallel to the plane should not exceed 1%. 5.3 Number of specimens A test specimen, or by the supply and demand sides agreed to determine the number of samples.

6 for conditioning and testing environment

According to the provisions of GB/T 2918-1998, the specimen before the test should be at a temperature of (23 ± 2) ℃, relative humidity (50 ± 10)% into the environment Line conditioning, settling time less than 16h. In the same conditioning test environment.

7 Test procedure

The sample is placed on the support plate, so that the pressure head drop, contacts the sample, the sample is applied to pre-load 4.5N to the point of origin determination test The initial thickness of the sample. ......

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