Extrusion Process
Types Of Material
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Home > Plastic Extrusion
Sheet extrusion is a technique for making flat plastic sheets from a variety of resins. Extrusion is a manufacturing process where a billet of material is drawn through a die to create a flat sheet. The process usually creates long length of the final product and may be continuous or semi-continuous in nature.

Two types of extrusion processes are used in the ARITA PLASTICS;
1) Single Material Extrusion
2) Co-Extrusion

Monolayer Extrusion, in this process, a single plastic material is processed on a single extruder into the desired outcome.

Co-extrusion represents newer technology, in a process where two or more polymers are extruded by two or more extruders into a common die. This allows more freedom in designing performance into his final product. Material selection can be tailored specifically to the requirements for the outer and inner layers.

For successful CO-extrusion, it is necessary that the polymers be compatible in material properties (i.e. melt viscosity, co-efficient of expansion, and lubricity). 

The capstock (or top layer) contains the same basic resins and ingredients as the substrate (or inner layer);  and the two layers remain permanently bonded as function of die design,  heat and pressure. By custom designing the correct properties in the capstock and substrate layers, a product superior to monolayer extrusions is produced.

The Attraction of Extrusion is the low tooling cost, color matching and shorter lead times.

Advantages of Extrusion
• Low cost tooling and short lead times
• Use of multiple materials in a variety of durometers
• Color matching

Market Segment uses thick sheet for industrial and recreational applications like truck bed liners, pallets, automotive dunnage, playground equipment, boats and so on.