Questions about Thermoset Composites?

Zero Shrink Class A Sheet Molding Compound

These materials are intended for use in automotive or transportation body panels that require painting. These composite materials exhibit a zero or near zero shrink characteristic and in some cases can be designed to have modest expansion. They are not intended have superior color properties but will provide a suitable surface for adhesion and surface quality.

Please note: all of our materials are custom developed to meet your specific requirements, if you don't see a product performance metric that meets your needs, call us to discuss your specific project requirements at 317.773.1766 or email us at sales-usa@idicomposites.com.

Zero Shrink Class A Sheet Molding Compound

S31 Series – Class "A" Grade
Sheet Molding Compound (SMC)

S31-31T-29

S31-41T-36

S31-51T-40

Glass Content

29%

36%

40%

Flexural Strength
Test Method: ASTM D790

231 MPa

193 MPa

170 MPa

Flexural Modulus
Test Method: ASTM D790

11,031 MPa

8,400 MPa

8,000 MPa

Tensile Strength
Test Method: ASTM D638

105 MPa

105 MPa

82 MPa

Tensile Modulus
Test Method: ASTM D638

11,037 MPa

9,300 MPa

7,500 MPa

ALSA Value
Test Method: Ashland Method

46.1

59

65

Orange Peel
Test Method: Ashland Method

9.6

9.0

8.5

Distinction of Image
Test Method: Ashland Method

100

89

80

Shrinkage
Test Method: ASTM D955

Zero % Shrink (Cold-Cold)

Specific Gravity
Test Method: ASTM D792

1.9

1.5

1.2

Click to download a pdf of the S31 Series Data Sheet

S31 Specific Strength Chart
S31 Specific Strength Chart

The information on this sheet is a guide. The stated values reflect an average of several tests conducted on CI's goods. These values were obtained under ideal conditions and may not be replicated in any particular test, part, or application. Because the values achieved in actual parts depend considerably on part design, molding conditions, and testing methods, no guarantee is made or implied regarding values to be obtained in any specific test, part, or application. CI makes no warranty or representation as to the suitability of any of its goods for use in any application. CI relies on customer to conduct its own tests and judge for itself the suitability of CI's goods.