GB/T 8948-2008 PDF English
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 8948-2008 | English | 190 |
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Polyvinyl chloride artificial leather
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| GB/T 8948-1994 | English | 399 |
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Polyvinyl chloride artificial leather
| Obsolete |
| GB 8948-1988 | English | RFQ |
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Polyvinylchloride coated fabrics
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GB/T 8948-2008: Polyvinyl chloride artificial leather---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/GBT8948-2008
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 59.080.40
Y 47
Replacing GB/T 8948-1994
Polyvinyl chloride artificial leather
Issued on. AUGUST 19, 2008
Implemented on. MAY 01, 2009
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine of PRC;
Standardization Administration of PRC.
Table of Contents
Foreword... 3
1 Scope... 4
2 Normative references... 4
3 Classification... 5
4 Requirements... 5
5 Test method... 8
6 Inspection rules... 13
7 Marking, packaging, transportation, storage... 15
Foreword
This standard replaces GB/T 8948-1994 "Polyvinyl chloride artificial leather".
Compared with GB/T 8948-1994, the main changes of this standard are as follows.
- This standard adds classification according to whether the coating is foamed.
Foamed leather and non-foamed leather.
- This standard readjusts the index 4.1.2; determines different indexes, according to
different thicknesses.
- The indicators 4.1.4, 4.2, 4.3 in the requirements of this standard are not graded,
BUT the first-grade indicators of the original standard are uniformly adopted.
- This standard divides it into general physical and mechanical properties (4.3) and
negotiated physical and mechanical properties (4.4), according to the importance
of physical and mechanical properties to the product.
- The folding fastness, adhesion, low temperature folding fastness, rub resistance,
bursting strength, in the original standard, are included into the negotiated physical
and mechanical properties; add two indicators of light resistance and vulcanization.
- In this standard, the test methods for light resistance and vulcanization are added
to the test methods; meanwhile the test methods for low temperature folding
fastness, rub resistance, bursting strength are moved from the appendix to the main
text.
- The aging test temperature is not graded, uniformly adopting the first-grade index
of the original standard.
This standard was proposed by China National Light Industry Federation.
This standard shall be under the jurisdiction of the National Technical Committee for
Standardization of Plastic Products.
Responsible drafting organization of this standard. Foshan Plastics Group Co., Ltd.
Shuanglong Branch. Participated drafting organization of this standard. Wuxi
Shuangxiang Microfiber Material Co., Ltd.
The main drafters of this standard. Wu Jinghua, Gao Pian, Zeng Xiuming, Zhang
Qingrong, Zhao Mei.
This standard replaces the standard previously issued as follows.
- GB 8948-1988, GB/T 8948-1994.
Polyvinyl chloride artificial leather
1 Scope
This standard specifies the product classification, requirements, test methods,
inspection rules and marking, packaging, transportation, storage of polyvinyl chloride
artificial leather.
This standard applies to the polyvinyl chloride artificial leather, which is made of plain
weave or twill fabric as the base, by adding plasticizers and other additives to the
polyvinyl chloride resin, through calendering or coating.
This standard does not apply to knitted cloth-based polyvinyl chloride artificial leather.
2 Normative references
The provisions in following documents become the provisions of this Standard through
reference in this Standard. For the dated references, the subsequent amendments
(excluding corrections) or revisions do not apply to this Standard; however, parties who
reach an agreement based on this Standard are encouraged to study if the latest versions
of these documents are applicable. For undated references, the latest edition of the
referenced document applies.
GB/T 250-2008 Textiles - Tests for colour fastness - Grey scale for assessing change
in colour
GB/T 1040.3-2006 Plastics - Determination of tensile properties - Part 3.Test
conditions for films and sheets
GB/T 1539-2007 Paperboard - Determination of bursting strength
GB/T 2828.1-2003 Sampling procedures for inspection by attributes - Part 1.
Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot
inspection
GB/T 2918-1998 Plastics - Standard atmospheres for conditioning and testing
GB/T 3920-2008 Textiles - Tests for colour fastness - Colour fastness to rubbing
GB 7565-1987 Textiles - Tests for colour fastness - Specification for standard
adjacent fabric - Cotton and viscose
3 Classification
3.1 See Table 1 for the classification of products, according to the cloth-based textile
method.
4 Requirements
4.1 Specifications
4.1.1 The width and limit deviation shall meet the requirements in Table 2.
4.1.2 Thickness and limit deviation shall comply with the requirements in Table 3.
4.1.3 The limit negative deviation of the length of each roll is 0.1 m.
4.1.4 The number of segments and the minimum segment length of each roll shall
comply with the provisions of Table 4.
4.3 Physical-mechanical properties
5 Test method
5.1 Specimen preparation
Cut more than 1 m, along the warp direction of the product, as a sample. After removing
the width of 50 mm, from both ends of the specimen, in the weft direction, carry out
specimen preparation. The cut number and size of the specimen are in accordance with
the provisions of Table 8 and Figure 1.
5.3 Width
Use a steel tape measure or instrument, which has an accuracy of 1 mm, to measure 3
places, along the length direction at random. Take the minimum value as the result,
accurate to 1 mm.
5.4 Thickness
5.6 Appearance
Carry out visual inspection under natural light; make measurement with a
corresponding gauge.
5.7 Tensile load and elongation at break
Carry out in accordance with the provisions of GB/T 1040.3-2006.Use the type 2
specimens; the distance between the marking lines of the specimens is 100 mm; the
tensile speed is 200 mm/min.
5.11 Cold resistance
It is carried out, according to the provisions of HG/T 2-162-1965; the test temperature
is (-10 ± 1) °C. Take the worst test data as the test result.
5.12 Aging
5.12.1 Instruments
Heat aging test chamber. It is equipped with rotating specimen holder and blower
device.
5.14 Folding fastness
It is carried out, in accordance with the provisions of QB/T 2714-2005.
5.15 Folding fastness at low temperature
5.15.1 Test instrument
The low-temperature folding fastness testing machine shall meet the requirements of
QB/T 2714-2005.
5.15.2 Test procedure
Taking the center line of the length of the specimen as a reference, fold the coating
inwards. Put one end of the folded specimen into the upper clamp of the instrument, so
that the top end is in contact with the screw, AND the fold line is flush with the bottom
edge of the clamp. Then fold the other end of the specimen inward; insert it into the
lower clamp. Then adjust the temperature in the chamber to (-10 ± 2) °C. When the
counter reaches 30000, stop the test. Observe the change of the folded part. Take the
worst test data as the test result.
5.16 Rub resistance
5.16.1 Test instruments
Scott-type rubbing tester.
6 Inspection rules
6.1 Inspection classification and items
6.1.1 Exit-factory inspection
The exit-factory inspection items are the items in 4.1, 4.2, 4.3.1 in the requirements.
6.1.2 Type inspection
Type inspection shall be carried out, in one of the following situations.
6.2 Exit-factory inspection
6.2.1 Group-batching and sampling
6.2.2 Judgment rules
6.2.2.1 Determination of qualified items
The determination of specifications and appearance sample units shall be carried out,
in accordance with the provisions of 4.1 and 4.2, respectively. If the inspection result
of the sample unit conforms to the provisions in Table 9, it is judged that the
specification and appearance are qualified.
6.3 Type inspection
6.3.1 Sampling
A roll is randomly selected from the products, that have passed the exit-factory
inspection, for the inspection of appearance and specifications. The 1 m is taken, for
the inspection of physical-mechanical properties.
6.3.2 Judgment rules
Specifications and appearance shall be carried out, in accordance with the provisions of
4.1 and 4.2.If it is not qualified, 3 rolls shall be re-selected randomly from the original
product, for re-inspection. If the re-inspection results are all qualified, the specification
and appearance are judged to be qualified.
7 Marking, packaging, transportation, storage
7.1 Marking
Each roll of product shall be accompanied by a certificate of conformity AND have the
following marks.
7.2 Packaging
The product shall be coated inward; rolled into a neat round roll with a roll core;
packaged with plastic film or paper. It can also be as negotiated by both the supplier
and the buyer.
7.3 Transportation
When the product is transported, it shall prevent collision or contact with sharp objects.
It shall be lightly loaded and unloaded. It shall not be under heavy pressure. Do not
expose to the sun and rain. Keep the packaging intact.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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