Method of making polypropylene printing plate using paper matrix

Details Method of making polypropylene printing plate using paper matrix Method of making polypropylene printing plate using paper matrix

1976-03-24

1981-10-27

Michl, Paul R.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

101395, 1014011, 264225, C08K 520

Patent

active

042972639

ABSTRACT:
A method of making a polypropylene printing plate using a paper matrix in which a roll and an opposing member are prepared, a paper matrix is attached to one of the roll and opposing member, a crystalline ethylene-propylene copolymer having a MFI (melt flow index) of 3.about.10, containing ethylene less than 20% by weight and tensile yield strength of 220.about.330 kg/cm.sup.2 is continuously fed under molten state between the roll and the opposing member, and then the crystalline ethylene-propylene copolymer is pressed and cooled to be hardened.
Further, a reproducing printing plates consists of a crystalline ethylene-propylene copolymer whose melt flow index is selected in a range of 3.about.10, which contains ethylene less than 20 weight % and which has the tensile yield strength of 220.about.330 kg/cm.sup.2.

REFERENCES:
patent: 3328486 (1967-06-01), Crawford
patent: 3330796 (1967-07-01), Mock
patent: 3371130 (1968-02-01), Seifert
patent: 3929932 (1975-12-01), Castagna
patent: 3944530 (1976-03-01), Sugita

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