Conwed Corporation

Ronald L Larsen

William Bela Haffner

Clifford W Berry

The present invention is directed to the manufacture of plastic net formed by extruding a plurality of spaced strands of plastic into a net structure. In accordance with the invention, adjacent strands in the net are joined in physical contact throughout all or a substantial portion of the length of the strand between the joints in the net structure. The strands are merged and integrally consolidated in the joints so that in effect the extruded structure is a solid sheet with or without perforations between the strands. Thereafter the strands are stretched preferably in two different directions to draw the strands apart and separate them throughout the length of the strands between the joints to form a high strand count oriented net produced for the first time by extrusion.

High strand count plastic net

An extruded thermoplastic netting having two sets of strands, which sets cross each other at substantially a right angle, is molecularly oriented first along one set of strands and then along the other set to achieve improved heat stability as compared to previous simultaneous orientation of the sets of strands and under conditions to minimize webbing at the joints.

Method of orienting sheet plastic net and article produced therefrom

Process for manufacturing high strand count plastic net

A plastic packaging product is disclosed. In its final form it can be used in packaging to locate, separate and suspend items to be packaged. The packaging product comprises a plurality of extruded members in one direction linked with a plurality of extruded members in a transverse direction.

Plastic packaging product for separation of components

An apparatus for the production of perforated tubular film i.e., net is disclosed. A tube of a thermosetting polymer is continuously extruded and the extrusion opening is alternately interrupted first from one side of the tube and then from the other thereby doubling the capacity of the machine.

Production of net or net-like products

A seedling transplant container is disclosed. The container is a net-like tube preferably with an open bottom and having one set of strands which is of substantially greater strength (at least 25% and preferably 50%) than the other set of strands so that the container can be machine planted but yet easily ruptured by the growing plant.

Seedling transplant containers

Lubricants for the production of net-like products from nylon and polytetramethylene terephthalate are disclosed. The lubricants comprise polyolefin with a specific melt index, said polyolefins being homopolymers of olefins or copolymers of two or more olefins.

Growing community of inventors

Minneapolis, MN, United States of America

Ronald L Larsen