Abstract:
A steel pipe is coated with resin at high temperature. After the temperature is lowered slightly below the softening point of the resin, the coated pipe is cut to length and then allowed to be cooled down to an ordinary temperature, meanwhile the resin is freely shrunk, leaving little residual strain in the cooled product coating.A cooling means for cooling the coating from the middle toward the ends in its longitudinal direction and a means for cooling the coating forcibly are provided.
Abstract:
Coating tubular plastics film by depositing on each surface of the lay-flat web a plurality of evenly spaced lines of coating material parallel with the length of the web, and using contra-rotating rollers to spread the deposited lines, causing them to merge into a uniform coating.
Abstract:
In a process for extrusion coating of both sides of a foamed polystyrene sheet with a rubber modified polystyrene the specific improvement of crushing the coated foam sheet such that it will rebound to only 30 to 70 percent of its original thickness results in a product of improved processing characteristics. This crushed sheet can be thermally formed into a wrinkle free china-like surface useful in making insulated dishes, trays, food containers and the like.
Abstract:
An apparatus and process for extruding a backing plastic layer upon channel cloth in a manner which aligns and maintains a plurality of rows of pile in precise parallel relation and which avoids crushing of the pile.
Abstract:
A process for continuously coating two sides of a heat fusible foam sheet with a resinous polymeric material, having the steps of: (1) melting the resinous polymeric material; (2) extruding the resinous polymeric material through a flat film die; (3) continuously passing the heat fusible foam sheet past the flat film die; (4) contacting the heat fusible foam sheet and the resinous polymeric material; (5) compressing the contacted heat fusible foam sheet and resinous polymeric material; (6) limiting the amount of reverse wrap of the heat fusible foam sheet and; (7) controlling the linear tension on the heat fusible foam sheet.