1、 WORLDWIDE ENGINEERING STANDARDS Material Specification GMW16865 Protective Tapes Copyright 2012 General Motors Company All Rights Reserved November 2012 Originating Department: North American Engineering Standards Page 1 of 4 1 Scope This specification describes flat-backed paper tapes, films, and
2、single coated foam tapes used to provide shipping protection for materials to prevent damage to their finish. The tapes must not have effect on the surface to which they are applied. They must not cause any surface etching, softening of the finish, finish discontinuities, latent staining or other ob
3、jectionable effects when they are removed. They must be easily removed without themselves tearing or removing the finish from the item being protected. 1.1 Material Description. This specification does not cover paint protection transit films applied to a vehicles horizontal surfaces. Refer to 99841
4、68 for paint protection transit films. 1.1.1 Tapes covered by this specification are coated with a removable pressure sensitive adhesive. The adhesive system must be pressure sensitive over the range of -20 C to 95 C. The tape must not show any mass transfer upon removal. 1.2 Symbols. Not applicable
5、. 1.3 Typical Applications. Non-painted parts. 1.4 Remarks. 1.4.1 Tapes specified here are of four basic types (Type I, Type II, Type III, and Type IV) with two grades (A and B) for each. 1.4.1.1 Type I. This is a flat-backed paper tape used for surface protection where transparency is not required.
6、 1.4.1.1.1 Grade A. This grade uses a latex based adhesive, and it should not be used to protect surfaces to be cut or drilled. In addition to metal surfaces, this grade should be used on plastic and paint finishes where greater surface compatibility may be required. Nevertheless, each application s
7、hould be proven on an individual basis. 1.4.1.1.2 Grade B. This grade uses a solvent based adhesive and is used on polished metal finishes where cutting, drilling, and processing is involved since it will not string out or ball up on cutting tools. 1.4.1.1.3 Type II. This is a transparent plastic fi
8、lm tape used where it is necessary to inspect the item being protected and where a non-aggressive adhesive compatible with plastic and paint finishes is required. The film must protect the part during shipping and handling. The film and adhesive must not be affected by heat or ultraviolet light such
9、 that the film tears or slivers during removal, adhesive mass transfer results, the finish being protected is removed, or otherwise effected, or staining results. Opaque plastic films and various film colors can also be used. The film color will be specified on the engineering drawing. 1.4.1.1.3.1 G
10、rade A. This grade is used for the protection of molded or extruded interior plastic parts and is to be removed by the dealer at the time of delivery. It is to be used for protecting parts during shipping from the molder to the assembly plant and, consequently, to the delivering dealer. Approval of
11、tapes for this grade must be done on each specific substrate on which the material intended is to used. 1.4.1.1.3.2 Grade B. This grade is used on the exterior to protect paint and plastic during shipping from the assembly plant to the dealer to be removed at time of delivery. It is intended to be u
12、sed in conjunction with the door protector assembly. This grade must be compatible with all of the present exterior body topcoat systems. 1.4.1.1.4 Type III. This type is similar to Type II Grade B except with the addition of abrasion test requirements. Films approved to this type provide additional
13、 abrasion resistance versus Type II. 1.4.1.1.4.1 Grade A material is for in-plant use only and is removed before the vehicle leaves the plant. 1.4.1.1.4.2 Grade B material remains with the vehicle during shipping and is removed by the dealer. 1.4.1.1.5 Type IV. This is a single coated foam tape used
14、 to protect door edges from scratches and dents. 1.4.1.1.5.1 Grade A material remains with the vehicle during shipping and is removed by the dealer. Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without
15、 license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16865 Copyright 2012 General Motors Company All Rights Reserved November 2012 Page 2 of 4 1.4.1.1.5.2 Grade B material is for in-plant use only and is removed before the vehicle leaves the plant. 2 References Note: Only the latest approved
16、standards are applicable unless otherwise specified. 2.1 External Standards/Specifications. ISO 8510-2 SAE J2527 2.2 GM Standards/Specifications. 9984168 GMW3208 GMW14162 GMW14873 GMW3059 GMW14124 2.3 Additional References. TMC003 Material Safety Data Sheet guidance documents (available at ). 3 Requ
17、irements 3.1 Requirements on Test Specimens. The proposed protective tape for each application must be tested on the production intent substrate. The material must conform to the performance requirements shown in Table 1 when evaluated at 23 C 3 C and 50% 5% relative humidity (RH) unless otherwise s
18、pecified. Florida results are not required for Production Part Approval Process (PPAP), but exposure testing shall be ongoing. Report results to the Design Release Engineer and Materials Engineer. Table 1: Performance Requirements Properties Type I Type II Type III Type IV Grade A and B Grade A Grad
19、e B Grade A Grade B Grade A Grade B Abrasion Test GMW3208, No added weight, CS-10 wheels. 50 cycles. - - - No film wear through No film wear through - - Adhesion Peel Strength, newton meters minimum (ISO 8510-2.) - - - - - - - As received. 85 85 85 85 85 85 85 After 336 h at 82 C. Not less than 85,
20、not greater than 275 Peels without tearing - Peels without tearing - After GMW14124 Cycle I (5 cycles). Not less than 85, not greater than 275 Peels without tearing - Not less than 85, peels without tearing - After 24 h at 38 C, 95% RH. Not less than 85, not greater than 275 - - - - - After 96 h at
21、38 C, 95% RH. - Not less than 85, not greater than 275 Not less than 85, peels without tearing - Peels without tearing - After 263 kJ Xenon interior exposure per GMW14162 Cycle D. - 350 maximum - - - - - After 252.8 and 505.6 kJ Xenon exterior exposure per SAE J2527, extended UV filters. - - 350 max
22、imum - 350 maximum Peels without tearing - Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16865 Copyright 2012 General Motors Company Al
23、l Rights Reserved November 2012 Page 3 of 4 Properties Type I Type II Type III Type IV Grade A and B Grade A Grade B Grade A Grade B Grade A Grade B After 6 months Florida direct, open rack exposure per GMW14873. Expose Florida samples 5 degrees south. At the discretion of Engineering, monthly sampl
24、es may be required. Exposure must be during the summer months. - - Peels without tearing - Peels without tearing - 3.2 Shrinkage (Type II, III, and IV) 1 mm Maximum. The shrinkage shall be determined by placing 600 mm lengths of the tape on the production intent substrate (stainless steel if substra
25、te is not determined) rolling it down with one pass of a 2 kg roller. The panel is then exposed for 24 h at 85 C in an air-circulating oven. After exposure, the length of the tape is remeasured when the panel has cooled to room temperature. 3.3 Mass Transfer and Affect on Finish. There shall be no a
26、dhesive mass transfer or affect on the finish when the tape is removed as a result of any of the environments required for adhesion peel. 3.4 Latent Staining (GMW14162, SAE J2527). Samples of the substrate after removal of protective tape after exposure to xenon, will be re-exposed to xenon, 100 kJ
27、per GMW14162 (interior) or 250 kJ per SAE J2527 with extended ultraviolet (UV) filters (exterior). There must be no evidence of discoloration or staining of the substrate after exposure. 3.5 Shelf Life. The material must meet all requirements of this specification after 90 days storage in the origin
28、al container at 35 C. 4 Manufacturing Process Not applicable. 5 Rules and Regulations 5.1 Legal Regulations. All materials must satisfy applicable laws, rules, regulations and recommendations valid in the country of usage. 5.2 Language. In the event of conflict between the English and domestic langu
29、age, the English language shall take precedence. 5.3 Inspection and Rejection. Samples of components or materials released to a GM material specification shall be tested for conformity with the requirements of this material specification and approved by the responsible Engineering department prior t
30、o commencement of delivery of bulk supplies. A new approval must be received for any changes, e.g., properties, manufacturing process, location of manufacture, etc. If not otherwise agreed, all testing and documentation normally required for initial release must be completed. It is the responsibilit
31、y of the supplier to inform the customer in a timely manner, without solicitation, and to include documentation of all modifications of materials and/or processes and to apply for a new release. If not otherwise agreed, all release tests shall be repeated and documented by the supplier prior to comm
32、encement of delivery of non-conforming bulk supplies. In individual cases, a shorter test can be agreed to between the responsible Engineering department and the supplier. 5.4 Material Safety Data Sheets/Safety Data Sheets (MSDS/SDS). For new product submissions, or when a change in chemical composi
33、tion of an existing product has occurred, a complete copy of the Material Safety Data Sheet/Safety Data Sheet must be submitted in compliance with the Globally Harmonized System of Classification and Labeling of Chemicals (GHS) requirements or other country-specific MSDS/SDS requirements. In additio
34、n, product MSDS/SDS submissions must be in compliance with specific country General Motors TMC003 Material Safety Data Sheet/Safety Data Sheet guidance documents where available. 5.5 All materials supplied to this standard must comply with the requirements of GMW3059, Restricted and Reportable Subst
35、ances for Parts. Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16865 Copyright 2012 General Motors Company All Rights Reserved November
36、 2012 Page 4 of 4 6 Approved Sources Materials supplied to this specification must be approved by General Motors. A list of approved materials can be found in MATSPC. This GM Material File is provided to third parties to reduce redundant testing of materials. If approved material already listed is u
37、sed, the part supplier can use GM Material File reference for Production Part Approval Process (PPAP) material approval. If the decision is made to use a not yet approved material, contact Materials Engineering for detail on the approval process. The material approval process must be completed prior
38、 to PPAP start date of the part supplied to General Motors. 7 Notes 7.1 Glossary. MATSPC: Global repository of GM approved materials for corresponding GM Engineering Standards. 7.2 Acronyms, Abbreviations, and Symbols. GHS Globally Harmonized System of Classification and Labeling of Chemicals MSDS M
39、aterial Safety Data Sheet PPAP Production Part Approval Process RH Relative Humidity SAE SAE International SDS Safety Data Sheet UV Ultraviolet 8 Coding System This standard shall be referenced in other documents, drawings, etc., as follows: Material per GMW16865 9 Release and Revisions This standar
40、d was originated in September 2012. It was first approved by the Adhesives Global Subsystem Leadership Team in November 2012. It was first published in November 2012. Issue Publication Date Description (Organization) 1 NOV 2012 Initial publication. Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
