通用公司标准GMW 15825-2008 塑料材料规范-聚烯烃类全交联热塑性弹性体（外饰用、可粘结 EPDM）

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WORLDWIDE

ENGINEERING

STANDARDS

Material Specification

Plastics GMW15825

Thermoplastic Elastomers - Polyolefinic, Fully Crosslinked, Exterior,

EPDM Bondable

September 2008 Originating Department: North American Engineering Standards Page 1 of 4

1 Scope

1.1 Material Description. This specification covers

the properties of black, heat stabilized,

weatherable, thermoplastic vulcanizates containing

fully crosslinked ethylene propylene diene

monomer (EPDM) elastomer particles dispersed in

a continuous polypropylene (PP) matrix. These

materials are formulated to bond to vulcanized

EPDM rubber and can be processed by injection

molding. Type A materials are non-modified

grades; Type B materials are modified grades (i.e.,

siloxane modified).

Material types are delineated by hardness values.

The types and corresponding hardnesses available

are identified in Appendix A, Table A1.

1.2 Symbols. The material abbreviation according

to ISO 18064 is >TPV-(EPDM + PP)<.

1.3 Typical Applications. Typical applications

include the following: weatherstrip corner molds

and end caps.

2 References

Note: Only the latest approved standards are

applicable unless otherwise specified.

2.1 External Standards/Specifications.

ISO 34-1 ISO 1183

ISO 37 ISO 1431-1

ISO 188 ISO 18064

ISO 812 SAE J1976

ISO 815 SAE J2527

ISO 868

2.2 GM Standards/Specifications.

GMW3001 GMW3059

GMW3013 GMW3221

3 Requirements

Materials approved to this specification shall meet

the requirements of GMW3013, General

Requirements for Handling of Technical Terms of

Delivery for Plastics.

3.1 Requirements on Delivery. Important

physical, mechanical and thermal properties that

characterize the material are summarized in

Table 1.

Note: For each product, the requirements to

Table 1 shall be documented by Certification

Statement according to GMW3013. The color shall

be specified on drawings, in material specifications

and otherwise.

3.2 Requirements On Test Specimens. Tests

shall be conducted using the latest issue of the test

methods indicated. Suitable precautions should be

taken to ensure that applicable safe limits are not

exceeded when conducting test procedures,

processes, and/or handling the materials required

by this specification.

3.2.1 Tests specimens shall be die cut from fan

gated injection molded plaques having a nominal

thickness of 2.0 ± 0.2 mm. Die cut specimens are

to be tested with the long axis of the test specimen

perpendicular to the direction of flow. Plaque

dimensions must be sufficient to permit this.

3.2.2 Tests shall be conducted 40 h minimum after

molding, and immediately following a conditioning

period of 24 h minimum per GMW3221, Code A,

unless otherwise specified. All tests shall be

performed on unannealed specimens. In addition,

tests specified at temperatures below or above

22 ± 3°C shall be conducted at the specified

temperature using specimens conditioned at the

specified temperature for 4 h minimum.

3.2.3 The minimum values specified in the property

tables must be met by test specimens in natural,

black, or in a standard sampled color if natural or

black are not available. For colored grades where

other pigment and additive systems (e.g.,

stabilizer) are used, the impact values shall not

decrease more than 10% from the specified

minimum value.

3.3 Compound Properties. See Table 1. A

minimum of six (6) lots shall be tested to Table 1.

The following are also required for full specification

approval:

• Young’s Modulus

• Poisson’s Ratio

GMW15825 GM WORLDWIDE ENGINEERING STANDARDS

Page 2 of 4 September 2008

• Coefficient of Linear Thermal Expansion

(CLTE)

• Stress-Strain Curve at 23°C

• Differential Scanning Calorimetry (DSC) Curve

• Thermogravimetric Analysis (TGA) Curve

• Infrared Spectroscopy (IR) Curve

Table 1: Compound Properties (Black)

Type A Type B Property Test Method Unit

4 5 4

Shore A

Hardness ISO 868, 15 s delay Shore A 65 ± 5 80 ± 5 70 ± 5

Specific Gravity ISO 1183 0.92 to 0.96 0.90 to 0.95 0.90 to 0.93

Tensile Stress

at Break ISO 37, Type 1 dumbbell,

500 mm/minute MPa 4.3 minimum 6.8 minimum 3.5 minimum

Elongation at

Break ISO 37, Type 1 dumbbell,

500 mm/minute % 460 minimum 500 minimum 350 minimum

Tensile Stress

at 100%

Elongation

ISO 37, Type 1 dumbbell,

500 mm/minute MPa 1.5 minimum 2.9 minimum 2.0 minimum

Compression

Set ISO 815, Type A, 22 h at

70°C % 60 maximum 60 maximum 55 maximum

Tear Strength ISO 34-1, Method B, angle

die, 500 mm/minute kN/m 20 minimum 25 minimum 19 minimum

Low

Temperature

Brittleness

ISO 812, Type B °C -56 maximum -54 maximum -54 maximum

Properties After

Long Term Heat

Aging

Tensile

Stress

Elongation at

Break

ISO 188, 1000 h at 100°C

in an air-circulating oven

followed by indicated

property testing at 23°C.

Test methods are the same

as for original mechanical

property testing.

Change in

Property

No objectionable color change or tackiness

70 retention minimum

Ozone

Resistance ISO 1431-1, Procedure A,

100 pphm, 40°C Zero Rating

Accelerated

Weathering

Change in

Color

Surface

Defects

SAE J2527 with Extended

UV Filters, 2500 kJ/m2

ΔE < 3.0

No objectionable defects allowed

Solar

WeatheringNote1

Color Change

Surface

Defects

2 years exposure to

Natural weathering in

Arizona and Florida per

SAE J1976, Procedure A

ΔE < 3.0

No objectionable defects allowed

Note 1: In case of conflict between accelerated weathering and natural weathering, natural weathering takes precedence.

3.4 Performance Requirements. Performance

requirements, e.g., flammability, resistance to odor,

etc., shall be specified on part drawings or in

component specifications.

4 Manufacturing Process

Not applicable.

GM WORLDWIDE ENGINEERING STANDARDS GMW15825

September 2008 Page 3 of 4

5 Rules and Regulations

5.1 All materials supplied to this standard must

comply with the requirements of GMW3001, Rules

and Regulations for Material Specifications.

5.2 All materials supplied to this standard must

comply with the requirements of GMW3059,

Restricted and Reportable Substances for

Parts.

6 Approved Sources

Engineering qualifications of an approved source

are required for this standard. Only sources listed

in the GM Materials File (i.e., GM MATSPC) under

this standard number have been qualified by

engineering as meeting the requirements of this

standard.

7 Notes

7.1 Glossary. Not applicable.

7.2 Acronyms, Abbreviations, and Symbols.

CLTE Coefficient of Linear Thermal

Expansion

DSC Differential Scanning Calorimetry

EPDM Ethylene Propylene Diene Monomer

IR Infrared

PP Polypropylene

TGA Thermogravimetric Analysis

TPV Thermoplastic Vulcanizate

8 Coding System

This standard shall be referenced in other

documents, drawings, etc., as follows:

Material per GMW15825P-TPV(EPDM+PP)

Type X.

Where:

GMW = GM Worldwide Specification

15825 = Sequential Number

P = Plastic

TPV = Thermoplastic Vulcanizate

(EPDM+PP) = (Ethylene Propylene Diene

Monomer plus

Polypropylene)

Type X = Type A1 to A5 or B1 to B5 as

defined in Table 1

9 Release and Revisions

9.1 Release. This standard originated in March

2008. It was first approved by the Global Plastics

Team in September 2008. It was first published in

September 2008.

Cross-Reference of Replaced Specifications

GMW15825P-TPV

(EPDM+PP) Type Specification

Replaced

A4 GMP.E/P.138

A5 GMP.E/P.126

B4 GMP.E/P.161

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标签： #塑料 #塑料材料 #弹性体

摘要：

本页面详细解读通用公司标准GMW 15825-2008，该标准规定了用于汽车外饰件的聚烯烃类全交联热塑性弹性体（TPV）材料规范，特别强调其与EPDM的可粘结性能。内容涵盖材料的物理机械性能、热老化特性、耐化学品性及粘结强度要求，适用于汽车外饰部件如密封条、挡水板及装饰件的设计、选材与质量验证。通过查阅本标准，工程师可准确掌握材料牌号对应的性能指标与测试方法，确保外饰件在长期户外环境下的耐久性与粘结可靠性，助力符合通用汽车全球材料认证体系的开发与采购决策。

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通用公司标准GMW 15825-2008 塑料材料规范-聚烯烃类全交联热塑性弹性体（外饰用、可粘结 EPDM）

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