Duplicate thermoplastic plates, matrices useful therefor and met

Details Duplicate thermoplastic plates, matrices useful therefor and met Duplicate thermoplastic plates, matrices useful therefor and met

1976-06-24

1978-07-25

Robinson, Ellis

Stock material or miscellaneous articles

Structurally defined web or sheet

Including variation in thickness

1014011, 1014012, 427144, 428172, 428220, 428323, 428325, 428330, 428512, 428521, 428537, 2041592, 20415918, B41D 702

Patent

active

041030575

ABSTRACT:
Duplicate thermoplastic plates are composed of a composition comprising a 1,2-polybutadiene having a crystallinity of about 10-30% and an intrinsic viscosity of greater than about 0.7. Matrices against which the duplicate thermoplastic plates are molded are formed of material containing said 1,2-PBD and a photoinitiator or a thermo-curable catalyst. The duplicate thermoplastic plates and matrices can give a high duration and reproducibility from an original pattern bearing design or image in relief, and they are molded with ease and in a great amount without difficulty. The use of the thermoplastic plates or matrices can provide a good releasability from the matrix against which the said plates are molded and from the original pattern against which the matrices are formed.

REFERENCES:
patent: 2638845 (1953-05-01), Perkins
patent: 2669535 (1954-02-01), Orr
patent: 3004871 (1961-10-01), Leavitt
patent: 3145654 (1964-08-01), Johnson
patent: 3147706 (1964-09-01), Antonio
patent: 3347162 (1967-10-01), Braznell
patent: 3377950 (1968-04-01), Squitieri
patent: 3408437 (1968-10-01), Wheeler
patent: 3575109 (1971-04-01), Wall
patent: 3615469 (1971-10-01), Ramp
patent: 3812078 (1974-05-01), Takimoto

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