Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – Reshaping running or indefinite-length work
Patent
1979-07-30
1981-03-31
Lowe, James B.
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
Reshaping running or indefinite-length work
B29C 1700
Patent
active
042592852
ABSTRACT:
According to the improved process sheets of thermoplastic material are embossed especially on both faces by means of a pair of embossing rollers in such a manner that the embossing roller is maintained at a temperature within the plastic temperature range of the thermoplastic material, and the sheet forwarded to the roller has a temperature in the range of from the second order transition temperature of the thermoplastic material and a temperature superior to it by about up to 70.degree. C.; the sheet being forwarded at a speed of from 5 to 200 m/min and subjected to an embossing pressure of from 100 to 500 N/cm. This process prevents undesirable alteration of the pattern first embossed in the second embossing operation in the case of double-face embossment of the sheet. The embossed sheets may be applied for decoration purposes or the coating of furniture, as well as for writing.
REFERENCES:
patent: T927010 (1974-10-01), Whitfield et al.
patent: 2551966 (1951-05-01), Pierce
patent: 2976567 (1961-03-01), Jones et al.
patent: 3176058 (1965-03-01), Mittman
patent: 3246365 (1966-04-01), Kloender
patent: 3842152 (1974-10-01), Witfield, Jr. et al.
patent: 3882207 (1975-05-01), Hannan et al.
Chemische Industrie, vol. 7-12 Jul.-Dec. 1951, p. 698-699.
Baumgartl Wilhelm
Funke Hermann
Reiff Ulrich
Scheier Franz
Hoechst Aktiengesellschaft
Lowe James B.
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