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GB/T 8811-2008: Test method for dimensional stability of rigid cellular plastics
Status: Valid GB/T 8811: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 8811-2008 | English | 114 |
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3 days [Need to translate]
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Test method for dimensional stability of rigid cellular plastics
| Valid |
GB/T 8811-2008
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| GB/T 8811-1988 | English | 199 |
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Test method for dimensional stability of rigid cellular plastics
| Obsolete |
GB/T 8811-1988
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PDF similar to GB/T 8811-2008
Basic data | Standard ID | GB/T 8811-2008 (GB/T8811-2008) | | Description (Translated English) | Test method for dimensional stability of rigid cellular plastics | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | G31 | | Classification of International Standard | 83.100 | | Word Count Estimation | 6,671 | | Date of Issue | 2008-01-04 | | Date of Implementation | 2008-09-01 | | Older Standard (superseded by this standard) | GB/T 8811-1988 | | Quoted Standard | GB/T 2918-1998; GB/T 6342-1996 | | Adopted Standard | ISO 2796-1986, IDT | | Regulation (derived from) | China National Standard Approval Announcement2008 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 method for determining rigid foam dimensional stability under specified temperature and relative humidity conditions. This standard applies to the determination of rigid foam dimensional stability. | GB/T 8811-2008: Test method for dimensional stability of rigid cellular plastics---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 method for dimensional stability of rigid cellular plastics
ICS 83.100
G31
National Standards of People's Republic of China
GB/T 8811-2008/ISO 2796. 1986
Replacing GB/T 8811-1988
Rigid foam dimensional stability test methods
(ISO 2796. 1986, IDT)
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 identical with ISO 2796. 1986 "rigid foam dimensional stability test methods."
The standard ISO 2796. 1986 only made the following editorial changes.
--- Sequentially 7.3 Test Procedure some provisions have been adjusted;
--- Remove the ISO 2796. 1986 in the statement of the precision and accuracy.
This standard is GB/T 8811-1988 "rigid foam dimensional stability test methods" amendments.
This standard and GB/T 8811-1988 The main differences are as follows.
--- Increasing the foreword;
--- Increasing the terms and definitions;
--- Provisions given the sample size is the smallest;
--- After the samples were removed from the selected test conditions, storage time is changed from 1h 1h ~ 3h;
--- Test report adds, "size change rate arithmetic mean" information.
Since the implementation of this standard, instead of the GB/T 8811-1988.
The standard proposed by China National Light Industry Council.
This standard by the National Standardization Technical Committee of plastic products.
This standard was drafted. Beijing Plastics Research Institute, Beijing Technology and Business University.
The main drafters of this standard. Zhuwu Lan, Chen Qian.
This standard replaces the standards previously issued as follows.
--- GB/T 8811-1988.
GB/T 8811-2008/ISO 2796. 1986
Rigid foam dimensional stability test methods
1 Scope
This standard specifies the method for determining the rigid foam dimensional stability under specified temperature and relative humidity conditions.
This standard applies to the determination of rigid foam dimensional stability.
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 foam rubber - Determination of linear dimensions (idt ISO 1923. 1981)
3 Terms and Definitions
The following terms and definitions apply to this standard.
3.1
Sample placed at a certain time at a particular temperature and relative humidity conditions, resulting in three-dimensional directions perpendicular to each other on an irreversible dimension
Variety.
Principle 4
The sample is placed in a certain period of time under specified test conditions, and state regulation in a standard environment, the linear dimensions measured hair
Health changes.
5 Instruments
5.1 thermostat or humidity chamber
Can satisfy any constant temperature and humidity chamber or 7.1 test conditions required.
Measuring 5.2
Measuring linear dimensions measuring sample shall comply with GB/T 6342-1996 of.
6 Sample and preparation
6.1 Preparation of the sample
By sawing or other machining methods specimen was cut from the sample, and the sample surface to ensure smooth without cracks, without special rules shall
Remove the foam skin.
6.2 Sample size
Rectangular parallelepiped sample, the sample size is the smallest (100 ± 1) mm × (100 ± 1) mm × (25 ± 0.5) mm.
6.3 Number of specimens
Any one of the selected test conditions, each sample was tested at least three specimens.
6.4 conditioning
Samples shall GB/T 2918-1998 requirements, at a temperature of (23 ± 2) ℃, the state relative humidity of 45% to 55% under the conditions
GB/T 8811-2008/ISO 2796. 1986
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