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Group standard
TL 52704
Issue 2013-05
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Class. No.:55164
Descriptors:
EPDM, window guide, window weatherstrip, window al, door al, cover al, sunroof al, roof trim strip, flock coating, anti-friction coating, molding al, al
EPDM Body Seals Material Requirements
3 Types: A, B, C Preface
The Technical Supply Specification TL 52704 replaces TL 52345 and TL 52641 for new designs.Previous issues TL 52704: 2012-10Changes
The following changes have been made to TL 52704: 2012-10:–Requirements for tear propagation resistance expanded Scope
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This TL defines the material requirements for body als with and without surface coatings (anti-friction coating, flocking, coextruded material, and film), e.g., for aling of door systems, hoods,lids, tailgates, and sunroofs.Requirement General requirements
Approval of first supply and changes as per Volkswagen standard VW 01155.Resistance to open-air weathering as per VW 50185.
1
2 2.1
Always u the latest version of this standard.
This electronically generated standard is authentic and valid without signature.
The English translation is believed to be accurate. In ca of discrepancies, the German version is alone authoritative and controlling.Numerical notation acc. to ISO/IEC Directives, Part 2.
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All rights rerved. No part of this document may be provided to third parties or reproduced without the prior connt of one of the Volkswagen Group’s Standards departments.
© Volkswagen Aktiengellschaft
电影图片VWNORM-2012-05p
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TL 52704: 2013-05
Avoidance of hazardous substances as per VW 91101.
At least 6 complete parts are required for complete testing. Type according to drawing.Appearance
The parts must exhibit a uniform surface structure (smooth, no pimples, or other unevenness) and color and must be free of grea, dust, and mold relea agents.阿凡达剧情详解
Processing defects, e.g., cracks, holes, inclusions, dents, blisters, laminations, surface tackiness,other surface defects, or mechanical damage, are not permissible.
Adhesive joints or vulcanizing must exhibit no misalignment faults, burr formation, porosity, or other flaws.
The surface quality and color of vulcanized or bonded molded parts must be adapted to match the extruded areas. Transitions must be smooth and free of sink marks and bulges. Transitions from the extrudate to the molded part as well as the molded part itlf must not exhibit any sink marks,rubber residues, or bulges.
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The encapsulation thickness of metal inrts in als must be at least 0,7 mm to ensure reliable processing.
The paintwork must be applied evenly and must not exhibit any flaws in appearance.
Flock coatings must have an even surface density and color appearance and be free of recogniza‐ble excess adhesive and adhesive residues.
On products with straps/metal inrts that have elastomer jackets, the jackets must not rip open at a bending stress greater than r = 20 mm.
For products to be bonded, e.g., aling frames for window enclosures, the u of additives that can have a negative impact on the bonding process is impermissible.
There must be proper bonding between EPDM and other material components.
Excess adhesive application beyond the area of the bonding surface is not permissible for adhe‐sive joints. The full bonding or welding surface area must be ud for the joint.
If the width of the molded part joint or molded part closing area is larger than 4 mm, the area must be additionally coated with flock, coextruded sliding layer, or anti-friction coating. Alternatively, anti-friction TPE must be ud so that there is no profile surface in the visible or functional area that could give ri to complaints.
The material must be abrasion-resistant. Friction must not cau black traces on the surface of the opposing body.
The parts must not exhibit any unpleasant odor.Surface coatings Flock
If flock is ud, the following types may be ud:
100% polyester, 100% polyamide 6, 100% polyamide 66, all spin-dyed. Color, titer, and length as per drawing.
2.2
2.3 2.
3.1
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TL 52704: 2013-05
Paintwork
Anti-friction coating and layer thickness as per specification.Film
UHMPE film as per sample.Anti-friction coating
Material as per sample; layer thickness as per specification.Marking as per VDA 260
Elastomer > EPDM <
Flock
向日葵画法> PES < or > PA <Metal inrt > St < or > Al <
Molding al Material marking according to the material ud
Material, composite, and finished part properties
The material requirements are shown in table 1.
All material tests are performed on material specimens taken from the finished parts.The required numerical values apply to each individual measurement.
Table 1
2.3.2 2.3.3
2.3.4
2.4
3
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TL 52704: 2013-05
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