E7542 is a highly delaminated, high-aspect-ratio mica that provides maximum stiffness and CLTE
in TPOs, suiting it to underhood components.
So, when cured CF/EP service is under changing temperature work conditions, both the mismatch of CLTE
between the fiber and matrix and the dependence-temperature of resin will cause a change in IFSS, hence affecting the CFRP performance.
As a result, amorphous polymers show much smaller shrinkage upon solidification and expansion/contraction due to temperature change (shown by CLTE
The LCPC samples were tested for important physical properties, such as SG, water absorption, thickness swelling, and coefficient of linear thermal expansion (CLTE
), and mechanical properties, such as flexural strength and modulus, compressive strength, hardness, and nail withdrawal force (NWF).
* Coefficient of linear thermal expansion (CLTE
) -- measures the change in one dimension against the original dimension per unit change in temperature (in./in./[degrees]F.10-5 or cm/cm/[degrees]C l0-5) (Table 1).
Dimensional stability should be less than 5.0 CLTE
. Water absorption should be less than 1.15 percent TML.
* EcoLon GFT3040-BK1 is a first-of-its-kind, impact-modified PCR nylon 6 with superior low-temperature impact, minimum CLTE
, and good HDT.
Note that the coefficient of linear thermal expansion (CLTE
) is lower in the cross-flow direction than in prime nylon, when both are 33% glass-filled.
The values of the coefficient of linear thermal expansion (CLTE
The next-generation Noryl GTX 98X series materials also reduce the coefficient of linear thermal expansion (CLTE
) by 10 per cent vs previous grades for increased dimensional stability and improved gap and flush management, giving automotive designers freedom to create larger, high-precision body panels.
KetaSpire PEEK's low coefficient of linear thermal expansion (CLTE
) helps to ensure strong dimensional stability and tight tolerances.
Previous generations of the company's glass microspheres have been used for more than 20 years in a number of manufacturing applications, such as sheet molded composites and plastisols, because of their unique ability to reduce density and improve mechanical properties such as modulus and dimensional stability (shrinkage and CLTE
), according to the company.