Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond
Patent
1994-08-25
1996-03-12
Ryan, Patrick J.
Stock material or miscellaneous articles
Structurally defined web or sheet
Discontinuous or differential coating, impregnation or bond
428364, 428373, 4284117, 428480, 428483, 428913, 428914, 10112821, B32B 300
Patent
active
054984645
ABSTRACT:
A heat-sensitive stencil sheet consisting of a porous substrate and a thermoplastic film adhered to the substrate is provided without no use of an adhesive. The porous substrate comprises a screen cloth wholly or partially consisting of conjugate fibers (a sheath-core type or a side-by-side type) one exposed component of which has an affinity with the thermoplastic resin film and having a melting point lower than that of the other component of the conjugate fiber and lower than that of the thermoplastic resin, and the screen cloth is adhered to the thermoplastic resin film through the exposed component. The heat-sensitive stencil sheet can be produced by superposing the thermoplastic resin film on the substrate and heating under pressure the superposed film and substrate at the softening point or higher of the above exposed component of the conjugate fiber and at a temperature lower than the melting point of the other component of the conjugate fiber and lower than the melting point of the thermoplastic resin.
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patent: 3608024 (1971-09-01), Yazawa
patent: 4959260 (1990-09-01), Tomoyasu et al.
patent: 5160564 (1992-11-01), Hasegawa et al.
patent: 5243906 (1993-09-01), Okusawa
patent: 5245932 (1993-09-01), Ujiie
patent: 5252397 (1993-10-01), Hanzawa et al.
Chonan Satoshi
Ikejima Shoichi
Koishihara Takeshi
Shibuya Ken-ichi
Yamanaka Tetsu
Krynski William A.
Riso Kagaku Corporation
Ryan Patrick J.
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