The surface texture of a finished article.

Describes a very small void which has not blended completely with the surrounding material. Usually caused by a minute quantity of silicone, oil or other surface contaminate on the surface of the subs [..]

Resin that is forced out of the mold cavity area and onto the parting line or into the vents of the mold. A very thin film of cured resin attached to the molded part. Flash Pockets Flash pockets provi [..]

The ability of the molten resin to move or travel during injection. Flow can be influenced by temperature, part design, process conditions and tool design. Flow Balancing Modifying flow paths, particu [..]

Gate dimension parallel to the direction of melt flow. L/D Ratio Extrusion Barrel length divided by the diameter of the barrel

Any of a number of processes, such as drilling, turning, sanding, etc., which may be performed on a piece of plastic. Mar Resistance The resistance of glossy plastic surfaces to abrasive action.

A masterbatch is a concentrate of colorants or additives properly dispersed into a carrier polymer, which is then blended into the natural polymer to be coloured or modified.

The molten material which will fill the mold cavity to form the part. Melt Accumulator Also referred to as a plunger. A large capacity holding area for molten resin. The area of a structural foam mold [..]

A monomer is the molecular unit from which polymers are prepared. A polymer is a molecular chain formed by combining many smaller molecules. Polymers are the product of a reaction called polymerizatio [..]

Hollow metal hose screwed into the extrusion end of the heating cylinder of an injection machine designed to form a seal under pressure between the cylinder and the mold