1. Field of the Invention
The present invention relates to products made from recycled materials, in particular to a process for making stronger products from recycled materials in a municipal waste stream specifically using a venturi extrusion methodology,
2. Description of the Related Art
Municipal waste has become a serious problem in western society. Large fleets of trucks are used to transport the waste products of modern living to landfills on the edge of every modern city. The requirement for landfills is eating up increasingly large sections of land that could be used for other purposes. There is also the tremendous amount of recyclable material that is not being recycled. There is a very critical need to utilize this vast resource and at the same time save the “waste” land that is now being used as landfills.
There have been numerous attempts to create useful products from recycled materials. The main components in the majority of them have been waste wood and plastics. The methodologies utilized include injection molding and extrusion.
In current processes for making products from recycled materials the main problem has been the lack of strength of the final product. If the products are to be used for such applications as railroad ties, where immense pressures are applied, then the strength of the final product must be very high. However with the current methodologies most recycled building products lack sufficient tensile strength to be used for load bearing purposes.
Recycled products that have not been strengthened usually can only be used for decorative purposes due to lack of tensile strength. The exceptions are typically recycled wood based products. Without sufficient tensile strength the products will shear or bend easily. Therefore most current recycled products cannot be uses for construction beams, unsupported spans, railroad ties, etc, where greater strength is necessary.
What is needed is some method for improving the strength of recycled products that solves one or more of the problems described herein.