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GB/T 21282-2007 English PDF (GBT21282-2007)

GB/T 21282-2007 English PDF (GBT21282-2007)

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GB/T 21282-2007: Rubber/plastics weather strip for automobile
GB/T 21282-2007
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 83.140.99
G 47
Rubber/plastics weatherstrip for automobile
ISSUED ON: DECEMBER 13, 2007
IMPLEMENTED ON: JULY 1, 2008
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine of the People's Republic of China;
Standardization Administration of the People's Republic of
China.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Requirements ... 6
4 Test methods ... 11
5 Inspection rules ... 15
6 Marking, packaging, transportation and storage ... 18
Annex A (Normative) Method of test for the heat loss of PVC materials ... 19
Annex B (Normative) Method of test for the wear resistance of weatherstrips
... 20
Annex C (Normative) Method of test for the friction coefficient of
weatherstrips ... 23
Annex D (Normative) Method of test for the breaking tenacity of solid rubber
and cellular rubber of weatherstrips ... 26
Rubber/plastics weatherstrip for automobile
1 Scope
This Standard specifies the requirements, test methods, inspection rules and marking,
packaging, transportation and storage of rubber/plastics weatherstrips for automobile
(hereinafter referred to as weatherstrips).
This Standard applies to weatherstrips for passenger vehicles, which are made using
rubber, plastics or rubber-plastics compounds as main materials. It can be used for
reference for rubber/plastics weatherstrips for commercial vehicles.
2 Normative references
The provisions in following documents become the provisions of this Standard through
reference in this Standard. For dated references, the subsequent amendments
(excluding corrigenda) 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 528-1998, Rubber, vulcanized or thermoplastic – Determination of tensile
stress-strain properties (eqv ISO 37:1994)
GB/T 529-1999, Rubber, vulcanized or thermoplastic – Determination of tear
strength (Trouser, angle and crescent test pieces) (eqv ISO 34-1:1994)
GB/T 531-1999, Rubber - Determination of indentation hardness by means of
pocket hardness meters (idt ISO 7619:1986)
GB/T 1040-1992, Plastics – Determination of tensile properties
GB/T 1633-2000, Plastics--Thermoplastic materials--Determination of Vicat
softening temperature (VST) (idt ISO 306:1994)
GB/T 2411-1980 (1989), Plastics – Shore hardness test (eqv ISO 868:1978)
GB/T 2828.1, Sampling procedures for inspection by attributes – Part 1: Sampling
schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection (GB/T
2828.1-2003, ISO 2859-1:1999, IDT)
GB/T 2917.1-2002, Determination of compounds and products based on vinyl
chloride homopolymers and copolymers to evolve hydrogen chloride and any
other acidic products at elevated temperatures – Congo red method (eqv ISO 182-
1:1990)
GB/T 3512-2001, Rubber, vulcanized or thermoplastic – Accelerated ageing and
heat resistance tests - Air-oven method (eqv ISO 188:1998)
GB/T 3672.1, Rubber – Tolerances of products – Part 1: Dimensional tolerances
(GB/T 3672.1-2002, ISO 3302-1:1996, IDT)
GB/T 5470-1985, Test method for brittleness temperature of plastics by impact
GB/T 5721, General rules of marking, packaging, transportation and storage for
rubber sealing products
GB/T 7141-1992, Plastics – Methods of exposure to thermal air
GB/T 7759-1996, Rubber, Vulcanized or thermoplastic – Determination of
compression set at ambient elevated or low temperatures (eqv ISO 815:1991)
GB/T 7762-2003, Rubber, vulcanized or thermoplastic – Resistance to ozone
cracking – Static strain test (ISO 1431-1:1989, MOD)
GB 8410, Flammability of automotive interior materials
GB/T 9286-1998, Paints and varnishes – Cross cut test for films (eqv ISO
2409:1992)
GB/T 12831-1991, Rubber, vulcanized – Test method of resistance to artificial
weathering (xenon lamp) (neq ISO 4665-3:1987)
GB/T 15256-1994, Rubber, vulcanized – Determination of low-temperature
brittleness (multiple test piece method) (eqv ISO 812:1991)
GB 15763.2, Safety glazing materials in building – Part 2: Tempered glass
GB/T 19243-2003, Rubber, vulcanized or thermoplastic – Methods of test for
staining in contact with organic material
HG/T 2369, Technical specifications for rubber/plastics tension tester
HG/T 3055-1988 (1997), Latex foam – Determination of apparent density
QC/T 709-2004, Test method of compression set for automobile weatherstrips
QC/T 710-2004, Test method of compression load for automobile weatherstrips
QC/T 716-2004, Retention strength and insertion resistance test method for
automobile weatherstrips
3 Requirements
3.1 Dimensions and tolerances
The cross-section shapes, dimensions and tolerances of products, and the lengths and
tolerances of products shall be as required by design drawings; if it is not explicitly
specified in drawings, the supplier and the purchaser shall choose and use in
accordance with the classes specified in GB/T 3672.1.
3.2 Appearance quality
The appearance quality of weatherstrips shall be as specified:
-- no defect is permitted which affects the appearance and usability of products,
such as impurities, bubbles, cracks, scratches, tears, hungry joints, damages,
distortions or flattening deformations and so on;
-- surface treated parts (including surface coating treatment, fit treatment, flocking
treatment) shall be uniform, clean and free from contamination, and no defects
are permitted including falling-off, stains and irregularities etc.;
-- the offsets of joining parts of products shall be as required by drawings, which
shall be formed uniformly with a flat surface;
-- the colours and patterns of weatherstrips shall be designed as required by the
purchaser, which shall be free from the defects including stains and
contaminations;
-- for products which are equipped with reinforcing strips, reinforcing strips shall be
free from falling off, uniform caulking and defects which affect the quality and
installation of products;
-- other appearance defects of products shall comply with the approved sample
piece requirements as agreed by the supplier and the purchaser.
3.3 Performance requirements for materials
The matrix materials of weatherstrips can be based on EPDM, PVC and TPE, whose
performance requirements shall be as specified in Tables 1 ~ 4. The performance
requirements for other matrix materials shall be as agreed by the supplier and the
purchaser.
3.3.1 Performance requirements for EPDM solid rubber material
4.3.1 The determination of the hardness of rubber materials shall be carried out using
the method specified in GB/T 531-1999; the determination of the hardness of plastic
and TPE materials shall be carried out using the method specified in GB/T 2411-
1980(1989).
4.3.2 The determination of the tensile strength and elongation at break of rubber
materials shall be carried out using the method specified in GB/T 528-1998; the
determination of the tensile strength and elongation at break of plastic and TPE
materials shall be carried out using the method specified in GB/T 1040-1992.
4.3.3 The test of the tear strength shall be carried out using the method specified in
GB/T 529-1999. Use right angle type test pieces (without cut).
4.3.4 The te...
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