通用公司标准GMW 15988-2008 塑料材料规格-聚丙烯与 EPR（三元乙丙橡胶）共混、耐紫外线稳定材料规范

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WORLDWIDE

ENGINEERING

STANDARDS

Material Specification

Plastics GMW15988

Blend from Polypropylene and EPR, UV Stable

October 2008 Originating Department: GME Specification Center Page 1 of 5

1 Scope

1.1 Material Description. This specification covers

the properties of UV stabilized blends of

polypropylene and EPR and blends of

polypropylene and EPR filled with glassfibres. It

covers injection molding types for manufacturing of

technical parts requiring a specific surface feel,

e.g. soft touch applications.

Note: Additional characteristics will be indicated by

code letters according to the respective

specification number. Code letters that may apply

to this specification are defined in GMW3013.

1.1.1 Additional Characteristics. Materials

certified to this material specification may have

additional characteristics, e.g. paintable, elastomer

modified, etc. Possible additional characteristics

are defined in GMW3013.

1.2 Symbols. The material abbreviation according

to ISO 11469 is

> PP+EPR <

and

> PP+EPR-GF.. <

respectively. The symbol has to be completed by

the supplier according to the glass fiber content of

the material.

1.3 Typical Applications. Typical applications

include the following: interior trim.

1.4 Remarks. Not applicable.

2 References

Note: Only the latest approved standards are

applicable unless otherwise specified.

2.1 External Standards/Specifications.

ISO 75-1 ISO 527-2

ISO 75-2 ISO 1133

ISO 75-3 ISO 1183-1

ISO 105-G02 ISO 1873-2

ISO 179 ISO 3167

ISO 188 ISO 3451-1

ISO 294 ISO 6603-2

ISO 527-1 ISO 11469

2.2 GM Standards/Specifications.

GMW3001 GMW14162

GMW3013 GMW14444

GMW3059 GMW14651

GMW3221 GMW14650

GMW3232 GMW14688

GMW3235

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 and Table 2.

Note: For each product the requirements to

Table 1 and Table 2 shall be documented by

Certification Statement according to GMW3013.

The color shall be specified on drawings, in

material specifications and otherwise.

3.1.1 Requirements on Test Specimens. Unless

otherwise specified, injection molding of test

specimens shall be accomplished per ISO 294 with

the conditions for injection molding from

ISO 1873-2. Test methods and specimen

dimensions shall also be in accordance with

ISO 1873-2 with the following additions: Use

ISO 3167, Type A, thickness 4 mm, for tensile and

flexural properties.

All tests shall be performed on specimens

40 h minimum after molding and immediately

following a conditioning period of 24 h minimum in

a controlled atmosphere per GMW3221, Code A,

unless otherwise specified. All tests shall be

performed on unannealed specimens.

The values specified in Table 1 shall be met by test

specimens in natural or black, the values specified

in Table 2 shall be met by integrally colored test

specimens. For integrally colored grades where

other additive systems (e.g. stabilizer) are used,

the impact values shall not decrease more than

10 % from the specified minimum value.

GMW15988 GM ENGINEERING STANDARDS

Page 2 of 5 October 2008

3.1.2 Chemical Requirements. All parts

manufactured from molding compounds shall be

resistant to the media they contact at their place of

use.

3.2 Compound Properties. See Table 1 and

Table 2. The following are also required for full

specification approval. The minimum number of

lots per test required is one in natural: Tensile

Modulus, Poissons Ratio, Stress Strain Curve at

+23 °C, +85 °C, -30 °C; Multiaxial Impact Curve.

See the TPO certification template for the test

procedures.

3.3 Performance Requirements. Performance

requirements e.g., flammability, fogging or

resistance to odor, shall be specified on part

drawings or in component specifications.

All finished parts for Interior applications shall meet

the requirements according to GMW14444 and

GMW14651.

All finished parts for Exterior applications shall

meet the requirements according to GMW14650.

Table 1: Compound Properties (Black or Natural)

Properties Standard Unit Type A Type B Type C Type D Type E

Tensile Modulus ISO 527-1

ISO 527-2 MPa 30…120 400…800 1200…1900 1900…2700 3800…5200

Tensile Stress at

Yield ISO 527-1

ISO 527-2 MPa  3  10  22  24  40

Tensile Stress at

Yield after heat

aging (Note 1)

ISO 527-1

ISO 527-2 MPa (Note 2)

Ash ISO 3451-1

(at +600 °C) % by mass 24…8 18…25 22…28 24…30

Density ISO 1183-1,

Method A g/cm30.90…

0.94 0.97…1.03 1.02…1.08 1.05…1.11 1.07…1.13

Melt FlowVolume

Rate MVR 230/2.16 ISO 1133 cm3 /10 min 4…9 5…10 5…10 5…10 5…10

Multiaxial Impact

Strength at +23 °C ISO 6603-2 J Report value (Energy at Maximum Force)

Multiaxial Impact

Strength at -30 °C ISO 6603-2 J Report value (Energy at Maximum Force)

Notched Charpy

Impact Strength at

+23 °C ISO 179/1eA kJ/m2 45  35  30  20  10

Notched Charpy

Impact Strength,

+23 °C after heat

aging (Note 1)

ISO 179/1eA kJ/m² (Note 2)

Notched Charpy

Impact Strength at

-30 °C ISO 179/1eA kJ/m2 10  10  6  6  4

Shrink, longitudinal ISO 294 % Target

range:

0.8…1.3

Target

range:

0.25…0.5

Target

range:

0.1…0.25

Target

range:

0.1…0.25

Target

range:

0.1…0.25

Shrink, transverse ISO 294 % Target

range:

0.7…1.4

Target

range:

0.6…0.9

Target

range:

0.5…0.8

Target

range:

0.6…1.0

Target

range:

0.7…1.2

HDT B, 0.45 MPa,

flatwise

ISO 75-1

ISO 75-2

ISO 75-3 °C  35  60  95  115  135

Resistance to GMW14688- L 0.5  0.5  0.7  0.7  0.7

GM ENGINEERING STANDARDS GMW15988

Page 3 of 5 October 2008

Properties Standard Unit Type A Type B Type C Type D Type E

Scratching Grain:

N134, colour

jetblack

A-10 N

Resistance to

Scratching after

Heat Aging; Grain:

N134 jetblack

(black)(Note 3)

GMW14688-

A-10 N L(Note 4)

Fogging GMW3235-B-

Y1-T2 mg  2.0

Emissions GMW15634

VOC value

SVOC value

µg/g

≤ 100

≤ 250

Note 1: Only for heat stabilized material (code letter H): Heat aging for (1000 ± 5) h at (+102 ± 3) °C according to ISO 188 Method A (air

oven method). Impact specimens for Charpy testing shall be notched prior to aging.

Note 2: Only for heat stabilized material (code letter H): Aged specimens shall have retention  100 % relative to unaged specimens

tested concurrently.

Note 3: Heat aging for (168 ± 3) h at (+102 ± 3) °C according to ISO 188 Method A (air oven method) Test after 24 h recovery.

Note 4: Aged specimens shall have at least the same scratch results relative to unaged specimens tested concurrently.

3.3 Compound Properties. See Table 2.

Table 2: Compound Properties (Integrally Colored)

Properties Standard Unit Type A Type B Type C Type D Type E

Notched Charpy

Impact Strength,

-30°C

ISO 179/1eA kJ/m2 10  10  6  6  4

Multiaxial Impact

Strength at -30°C ISO 6603-2 J Report value (Energy at Maximum Force)

Colorfastness to

Light, Natural

Weathering

Color Change

Surface Defects

Weather

Resistance

per

GMW3417-

L1-F2-G1-

T4.

Test at the

following

intervals:

1250 MJ/m²

(≈ 30 000 ly),

2300 MJ/m²

(≈ 55 000 ly),

3350 MJ/m²

(≈ 80 000 ly),

4400 MJ/m²

(≈ 105 000

ly).

Test

specimen

required to

be returned

to customer

at each

interval.

DE  3.0

No objectionable defects allowed

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标签： #材料规格 #塑料 #塑料材料

摘要：

本文详细解读通用公司标准GMW 15988-2008，该规范专门针对塑料材料中聚丙烯（PP）与三元乙丙橡胶（EPR）共混物的性能要求，特别强调材料的耐紫外线（UV）稳定性。此标准适用于汽车内外饰件中对耐候性有较高要求的塑料制品，确保材料在长期暴露于阳光和气候环境下仍能保持良好的机械性能、颜色稳定性及抗老化能力。内容涵盖材料定义、共混比例、物理力学性能指标、紫外线老化测试方法及合格判定标准。对于需要采购或认证符合通用汽车全球材料规范（GMW）的供应商及工程师，本文件是理解材料规格、进行质量控制和合

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通用公司标准GMW 15988-2008 塑料材料规格-聚丙烯与 EPR（三元乙丙橡胶）共混、耐紫外线稳定材料规范

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