SURFACE MODIFICATION | SCRATCH AND WEAR
Above: Avient’s new moisture resistant LFT provides a better surface finish
good surface finish in high gloss metal replace- ment applications. The company says that the high-performance polyamide gives visible compo- nents a decorative and stylish finish that is also resistant to scratching and chemicals. Grivory G7V also makes high-gloss surfaces possible for glass fibre-reinforced compounds. According to EMS-Grivory, glass fibre-reinforced Grivory G7V combines properties such as in- creased stiffness and strength, even after moisture
absorption, with the chemical resistance of a Grivory GV and the high-quality finish of a low or non-reinforced polyamide. In addition, the new Grivory G7V products exhibit better UV stability than other semi-aromatic polyamides. Grivory G7V was developed for metal replacement applications requiring an exceptional surface finish. The material is a new aliphatic high-performance polyamide with well-balanced properties, which enable cost-efficient production of lightweight compo- nents without any additional painting. The surface sheen of glass fibre-reinforced polyamides often disappoints when it comes to visible parts because the surface is too rough or uneven, the company says. Partially crystalline polyamides contract during cooling, leaving sink marks on the surface and rough areas due to exposed glass fibres. Complex injection moulded parts, therefore, often have to be painted in a separate production step to cover critical areas. Grivory G7V has a melting point of 215°C and
offers all the advantages of a semi-crystalline aliphatic polyamide such as PA 6 or PA 6/6, including easy processing, high stiffness and strength as well as resistance to chemicals. How-
Benefit from a true pilot-scale twin-screw extruder
The pilot-scale Thermo Scientific™ Process 16 Twin-screw Extruder is a modular extrusion system to exactly meet your processing requirements.
• Enables fast and reliable material development for advanced materials, polymers, or food
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• Realize process flexibility with a segmented screw design and broad portfolio of feeders, dies, and downstream equipment
Watch this video about the Process 16 Twin-screw Extruder
Process 16 Twin-screw Extruder »
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thermofisher.com/tse
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IMAGE: AVIENT
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