Thermoplastics

In contrast to crosslinking thermosets, whose cure reaction cannot be reversed, thermoplastics harden when cooled but retain their plasticity; that is, they will remelt and can be reshaped by reheating them above their processing temperature. Less-expensive thermoplastic matrices offer lower processing temperatures but also have limited use temperatures. They draw from the menu of both engineered and commodity plastics, such as polyethylene (PE), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polycarbonate (PC), acrylonitrile butadiene styrene (ABS), polyamide (PA or nylon) and polypropylene (PP). High-volume commercial products, such as athletic footwear, orthotics and medical prostheses, benefit from the toughness and moisture resistance of these resins, as do automotive air intake manifolds and other underhood parts.
Features

Preforming goes industrial, Part 1

ATL and AFP-based options now abound for processing dry and/or impregnated reinforcements as quickly as 1 minute or less with potential yearly part yields in the millions.

Features

Composites recycling: Gaining traction

Recycling of carbon fiber, glass fiber and — at last — resins, is growing as new players enter the space.

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SABIC launches new additive manufacturing resins

SABIC (Pittsfield, MA, US) has launched six new filaments for fused deposition modeling (FDM) and a new family of reinforced compounds for large format additive manufacturing.