Plastic extrusion involves forcing melted plastic through a die into a shape with a fixed cross section. It’s an efficient way to produce many shapes, and is essential in both industrial and domestic product applications. Since the plastic is melted from a solid form and then resolidified, only thermoplastics can undergo extrusion. The properties of this type of plastic make it good for recycling both scrap pieces and post consumer goods.
Hollow Pipe and Tubing
PVC water and sewer pipes are common forms of plastic extruded pipes. In industrial use, other plastics transport liquids and gasses that PVC may not be able to handle. Diameters of several feet are average for larger sewer pipes, which represent some of the largest plastic extrusions found. On the other end of the scale are micro-miniature medical tubes that can have an OD of less than .010”. Plastic tubing is essential for transporting oxygen in the ICU, fuel in small gasoline engines, and soda in a drinking straw.
These shapes—forms of plastic used as raw materials in machine shops—include round, square, and hexagonal bar stock, as well as rectangular pieces. All standard thermoplastics are available in these forms in sizes that match the need, and are available in any length.
Also included in this category are extruded decking, planks, and structural pieces that have become popular in recent years. Plastic decking and lumber are good venues for recycled plastics due to their large mass and non-critical nature. Outdoor furniture, fencing, and park benches are all made with extruded plastic pieces. These boards are weather proof, splinter proof, maintenance free, and generally outlast any exterior wooden member.
Read more: Products Created Using Plastic Extrusion