GB/T 10799-2008 English PDF

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GB/T 10799-2008: Rigid cellular plastics -- Determination of the volume percentage of open cells and of closed cells
Status: Valid

GB/T 10799: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 10799-2008	329	Add to Cart	3 days	Rigid cellular plastics -- Determination of the volume percentage of open cells and of closed cells	Valid
GB/T 10799-1989	559	Add to Cart	4 days	Cellular plastics--Determination of volume percentage of open and closed cells of rigid materials	Obsolete

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Basic data

Standard ID: GB/T 10799-2008 (GB/T10799-2008)
Description (Translated English): Rigid cellular plastics -- Determination of the volume percentage of open cells and of closed cells
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: G30
Classification of International Standard: 83.100
Word Count Estimation: 14,169
Date of Issue: 2008-01-04
Date of Implementation: 2008-09-01
Older Standard (superseded by this standard): GB/T 10799-1989
Adopted Standard: ISO 4590-2002, MOD; ASTM D6226-2005, MOD
Regulation (derived from): National Standard Approval Announcement 2008 No.1 (Total No.114)
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 rigid closed cell foam openings and volume determination of the percentage. This standard applies to contain a polymer membrane or cell wall is divided into many small cell foam, the cell may be openings (interlinked) or (not connected), or a composite of these types of closed cell.

GB/T 10799-2008: Rigid cellular plastics -- Determination of the volume percentage of open cells and of closed cells

---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.
Rigid cellular plastics. Determination of the volume percentage of open cells and of closed cells ICS 83.100 G30 National Standards of People's Republic of China Replacing GB/T 10799-1989 Rigid Foam Determination of the volume percentage of open and closed cells Posted 2008-01-04 2008-09-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This standard is GB/T 10799-1989 "rigid foam volume percentage of open and closed test method" amendment, the original test Li made reference to the international standard ISO 4590.2002 "rigid foam volume percentage of open and closed cells measured" reference test method ASTMD6226-05 "rigid foam Test Method for opening percentage." This standard replaces GB/T 10799-1989. This standard compared with GB/T 10799-1989 main changes are as follows. --- Test instrument and method of operation change. GB/T 10799-1989, respectively, using pressure variation method and volume expansion measurement method The amount of impermeable volume, the use of instruments and methods of operation are not the same; only the measurement of the standard volumetric expansion method impermeable volume. --- Test sample size change. GB/T 10799-1989 volume expansion method in the detection of sample size. length × width × thickness (100mm × 30mm × 30mm); this standard, the standard sample is two cubes, dimensions. 2.5cm × 2.5cm × 2.5cm. Another alternative is the two cylindrical shape, whose cross-sectional size of 6.25cm2, height 2.5cm. --- Open, closed porosity change in calculation methodology. GB/T 10799-1989 detection data plotted by extrapolation; this standard directly To detect data calculated by relevant formulas. --- The method of cutting the surface of the cell formation change correction. GB/T 10799-1989 to surface area and volume of various geometric At least three sets of samples, each take three samples, the apparent opening measurement sample volume fraction, and then plotted extrapolated correction; this Standard, directly to a single test sample with a blade parallel to the surface of each of the two samples cut along three sides of each cube. Third Two cubes produced a total of 16 smaller cubes, the surface area exposed and the number of openings bubble generated by cutting Add as a double, then this measure is calculated to obtain a correction value. Appendix B of this standard is a normative appendix, Appendix A is an information appendix. 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 Province Product Quality Supervision and Inspection Institute, Beijing Technology and Business University. The main drafters of this standard. Wang Yan, Zhu Yuhong, Zhou Xiaoling, Gan Chao, Chen Qian. This standard replaces the standards previously issued as follows. --- GB/T 10799-1989. Rigid Foam Determination of the volume percentage of open and closed cells

1 Scope

This standard specifies the rigid foam volume of open and closed cell percentage determination. This standard applies to containing the polymer membrane or the cell wall is divided into many small cell foam, the cell may be perforated (phase Pass) or closed (non-communicating) or these types of compound.

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 6342-1996 foam rubber - Determination of linear dimensions (idt ISO 1923. 1981) Accuracy GB/T 6379.4-2006 Measurement methods and results (trueness and precision) - Part 4. Determine the standard measurement direction The basic method of method accuracy (ISO 5725-4.1994, IDT) GB/T 8810-2005 rigid foam water absorption (ISO 2896.2001, MOD) GB/T 12811-1991 rigid foam average cell size of the test method ISO 4590.2002 Rigid foams of open and closed volume percentage of test methods 3 Terms and definitions, symbols 3.1 Terms and Definitions The following terms and definitions apply to this standard. 3.1.1 Closed cell, and not other cell communication. 3.1.2 The cell wall is not completely closed, and the other cell, directly or indirectly connected. 3.1.3 The internal volume of the gas can not be adopted, including the solid polymer volume (cell walls, pillars), filling volume, the use of solid particles or fibers Victoria closed cell volume caused by the individual and aggregate due to the rupture of the cell walls are interconnected but a group of small cell size and external communication is not. 3.1.4 Including the internal volume of the cell material and water seepage caused by cutting the surface of various irregular openings volume. The following symbols apply to this standard. ......

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