This standard specifies technical requirements, test methods, inspection rules, marking, packing, transport and storage of rubber weatherstrips for automobile.
This standard is applicable to weatherstrips for various automobiles manufactured with matrix material of ethylene propylene diene monomer (EPDM).
2 Normative References
The following standards contain provisions which, through reference in this text, constitute provisions of this standard. For dated reference, subsequent amendments to (excluding correction to), or revisions of, any of these publications do not apply. However, all parties coming to an agreement according to this standard are encouraged to study whether the latest edition of these documents is applicable. For undated references, the latest edition of the normative document is applicable to this standard.
GB/T 528-1998 "Rubber, Vulcamized or Thermoplastic-Determination of Tensile Stress-strain Properties" (eqv ISO 37:1994)
GB/T 531-1999 "Rubber-Determination of Indentation Hardness by Means of Pocket Hardness Meters" (idt ISO 7619:1986)
GB/T 1682-1994 "Rubber, Vulcanized-Determination of Low-temperature Brittleness(Single Test Piece Method)" (eqv ISO 812:1991)
GB/T 2828.1-2003 "Sampling Procedures for Inspection by Attributea-Part1: Sampling Schemes Indexed by Acceptance Quality Limit (AQL) for Lot-by-Lot Inspection" (idt ISO 2859-1:1999)
GB/T 2941-1991 "Rubber-Standard Temperatures, Humidities and Times for the Conditioning Environmental and Testing of Test Pieces" (eqv ISO 471:1983)
GB/T 3511-2001 "Rubber, Vulcanized and Thermoplastic-The Test Method of Resistance to Direct Natural Weathering" (neq ISO 4665:1998)
GB/T 3512-2001 "Rubber Vulcanized or Thermoplastic-Accelerated Ageing and Heat Resistance Tests-Air-oven Method" (eqv ISO 188:1998)
GB/T 3672.1-2002 "Rubber-Tolerances of Products-Part 1: Dimensional Tolerances" (idt ISO 3302-1:1996)
GB/T 5721-1993 "General Rules of Indentification, Packaging, Transportation and Storage for Rubber Sealing Products"
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" (eqv ISO 1431-1:1989)
GB/T 8170-1987 "Rules for Rounding off of Numberical Values"
GB/T 9868-1988 "Rubber-General Directions for Achieving Elevated or Subnormal Temperatures for Test Purposes" (idt ISO 3383:1985)
GB/T 12831-1991 "Rubber, Vulcanized-Test Method of Resistance to Artificial Weathering (Xenon Lamp)" (neq ISO 4665-3:1987)
GB/T 19243-2003 "Rubber, Vulcanized or Thermoplastic-Methods of Test for Staining in Contact with Organic Material" (idt ISO 3865:1997)
HG/T 2369-1992 "Specification of Tensile Testing Machine for Rubber and Plastics"
HG/T 3055-1988 (1997) "Latex Foam-Determination of Apparent Density" (eqv ISO 845:1977)
HG/T 3090-1987 (1997) "General Rules of Visual Quality for Moulded and Extruded Rubber Products"
QC/T 709-2004 "Test Method of Compression Set for Automobile Weatherstrips"
QC/T 710-2004 "Test Method of Compression Load for Automobile Weather-strips"
QC/T 711-2004 "Test Method of Abrasion of Flock for Automotive Weather-strip"
QC/T 716-2004 "Retention Strength and Insertion Resistance Test Method for Automobile Weatherstrips"
3 Requirements
3.1 General requirements
Weatherstrips shall be manufactured according to the technical documents approved through established procedure. Other specific requirements by the user shall be determined through the negotiation of the supplier and the purchaser.
3.2 Appearance
3.2.1 The appearance of compacting glue part of weatherstrips shall meet the relevant requirements of HG/T 3090-1987 (1997). The appearance of blown sponge shall be free from defects affecting product appearance and use performance, such as bubble, skin chapping, scarification and starved joint.
3.2.2 The flocking on flocking face shall be uniform; the surface shall be clean without spot; base material exposure is not allowed.
3.2.3 Special requirements shall meet the requirements for approved sealed specimen or template determinate through the negotiation of the supplier and the purchaser.
3.3 Specification and dimension
3.3.1 The product section form and dimension shall be within the tolerance range of control drawing with an amplification factor of 10. If there is no define requirements in the drawing, GB/T 3672.1-21302 may be complied with.
3.3.2 The product length dimension and tolerance shall meet the relevant requirements of the product drawing. If no tolerance indication, Table 1 may be complied with.
