HG/T 3055-2012 English PDF
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HG/T 3055: Historical versions
| Standard ID | USD | BUY PDF | Delivery | Standard Title (Description) | Status |
| HG/T 3055-2012 | 115 | Add to Cart | Auto, 9 seconds. | Latex foam. Determination of apparent density | Valid |
| HG/T 3055-1988 | 199 | Add to Cart | 3 days | Latex foam. Determination of apparent density | Obsolete |
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HG/T 3055-2012: Latex foam. Determination of apparent density
---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/HGT3055-2012HG CHEMICAL INDUSTRY STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 83.100 G 44 File No.: 38572-2013 Replacing HG/T 3055-1988 Latex foam - Determination of apparent density ISSUED ON: DECEMBER 28, 2012 IMPLEMENTED ON: JUNE 01, 2013 Issued by: Ministry of Industry and Information Technology of the People's Republic of China
Table of Contents
Foreword ... 3 1 Scope ... 4 2 Normative references ... 4 3 Term and definition ... 4 4 Test instruments and materials ... 4 5 Classification of samples ... 5 6 Preparation of test pieces ... 5 7 Test methods ... 6 8 Results presentation ... 6 9 Test report ... 7 Latex foam - Determination of apparent density1 Scope
This Standard specifies the methods for the determination of apparent density of latex foam. This Standard applies to the determination of apparent density of foam products made with natural rubber latex and synthetic rubber latex as the main raw material.2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. HG/T 3054 Latex foam - Determination of linear dimensions3 Term and definition
For the purpose of this document, the following term and definition apply. apparent density The mass of latex foam per unit volume under specified temperature and humidity.4 Test instruments and materials
4.1 Balance The accuracy of the balance is less than 0.1 % of the mass of the test piece. 4.2 Measuring tool It shall meet the requirements of HG/T 3054. 4.3 Linseeds7 Test methods
7.1 Measurement of the mass of test pieces Under the conditions of 6.3, use a balance (4.1) to weigh test pieces, in grams (g). 7.2 Measurement of the volume of test pieces Under the conditions of 6.3, use one of the following methods to measure the volume of test pieces. 7.2.1 Method A It is applicable to Category I test pieces. According to HG/T 3054, measure the dimensions of the test piece and calculate the volume of the test piece, in cubic millimeters (mm3). 7.2.2 Method B It is applicable to Category II test pieces. PLACE a glass jar on the level platform; PUT the test piece in the glass jar naturally; FILL the gap of the test piece with linseeds until it covers about 2 cm of the test piece; MAKE the surface of the linseeds flat; MEASURE the height of the surface of the linseeds at six points (or more than six points) that are evenly distributed along the circumference of the jar and TAKE the arithmetic average. After taking out the test piece, USE the same method to measure the height of the surface of the linseeds; CALCULATE the difference between the two measured volumes before and after, that is, the volume of the test piece, in cubic millimeters (mm3).8 Results presentation
The apparent density of test pieces is calculated by formula (1): where: ρa - the apparent density of the test piece, in kilograms per cubic meter (kg/m3); m - the mass of the test piece, in grams (g); V - the volume of the test piece, in cubic millimeters (mm3). ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
