METHOD AND DEVICE FOR MANUFACTURING PLASTIC BOARD, SHEET, BELTLIKE ARTICLE, BAND, BAR, SHAPE, PRODUCT OR SPECIAL-FORM ARTICLE HAVING LARGE MECHANICAL STRENGTH CONSISTING OF THERMOPLASTIC PLASTIC

Japanese Patent JPS5845017

A

The application discloses a process for the preparation of plates, films, sheets, strips, rods, molded parts, objects or profiles of high mechanical strength, from thermoplastic synthetic resinous materials, whereby the thermoplastic material is initially heated in an extruder or a similar installation equipped with a mixing and heating device to at least its melting or softening point, the emerging extruded mass subjected during or after a cooling process in a forming device, pressure drawing device or other accessory installation to at least one pressure stretching at a pressure from about 90 N/mm2 to 1500 N/mm2, preferably from about 155 N/mm2 to 1000 N/mm2, and/or to at least one pulsating pressure or shearing pressure treatment. Preferably, the pressure stretched or shearing pressure treated synthetic plastic material is subjected subsequently to at least one further tempering, preferably cooling and/or processing step. To carry out the process, an apparatus is used having at least one accessory device including one or more pressure rams and at least one nozzle, slot or a similar cross-section restriction in the form of an outlet orifice.

HERUMUUTO KOIFUAA
RUTSUTSU RAUTENBERUKU
YOAHIMU PAARU

JP14630582A

March 16, 1983

August 25, 1982

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ZORUFUAI UERUKE GMBH DEUTSCHE

B29C43/00; B29C45/00; B29C67/00; B29C69/00; B29C69/02; B29C71/00; B29C71/02; B29D1/00; B29C43/24; B29C48/07; B29C48/08; B29C55/30; (IPC1-7): B29C17/00; B29C24/00; B29F3/00

JPS5421460A	1979-02-17
JP56500606Y
JPS5034353A	1975-04-02
JPS5630809A	1981-03-28

Toshio Yano

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