INTERMEDIATE TRANSFER MEMBERS FOR USE WITH INDIRECT PRINTING SYSTEMS
Disclosed are curable polymer compositions, elastomers thereof and release layers useful in the art of printing made of the disclosed elastomers. Disclosed are also intermediate transfer members having a release layer useful in the art of printing. Disclosed are anisotropic intermediate transfer members. Disclosed are curable adhesive compositions, that in some embodiments are useful in preparing intermediate transfer members useful in printing.
1 . An intermediate transfer member for use with a printing system, comprising:
a longitudinal direction and a lateral direction;
a release layer having an image transfer surface; and
said release layer attached to a body supporting said release layer,
wherein said body is configured so that the intermediate transfer member has a substantially greater elasticity in said lateral direction than in said longitudinal direction.
2 . The intermediate transfer member of claim 1 , being at least one of the following: (a) substantially inelastic in said longitudinal direction; (b) substantially elastic in said lateral direction.
3 . The intermediate transfer member of any one of claims 1 to 2 , wherein at least one of the following is true: (a) said intermediate transfer member, when maintained at a temperature of about 150° C., is configured to stretch in said longitudinal direction by not more than about 1.5% under normal operating conditions; (b) said intermediate transfer member, when maintained at a temperature of about 150° C., is configured to elastically stretch in said lateral direction by not less than about 5%; (c) said body includes a plurality of primary fibers oriented substantially parallel to said longitudinal direction.
4 - 6 . (canceled)
7 . The intermediate transfer member of claim 3 , wherein at least one of the following is true: (a) said primary fibers are substantially inelastic; (b) said primary fibers comprise a material selected from the group consisting of organic polymer fibers, meta-aramid, para-aramid, polyamide, nylon fibers, polyester fibers, natural fibers, cotton fibers, inorganic fibers, glass fibers, carbon-fiber fibers, ceramic fibers metal fibers and combinations thereof.
8 - 9 . (canceled)
10 . The intermediate transfer member of claim 3 , said body further comprising at least one supporting component.
11 . The intermediate transfer member of claim 10 , wherein a said supporting component comprises a non-fibrous elastomer.
12 . The intermediate transfer member of claim 11 , said elastomer comprising a material selected from the group consisting of silicone rubber, neoprene rubber, hydrogenated nitrile butadiene rubber (HNBR), nitrile butadiene rubber (NBR), alkyl acrylate copolymer (ACM), ethylene propylene diene monomer (EPDM) and combinations thereof.
13 . The intermediate transfer member of claim 11 , wherein at least one of the following is true: (a) said primary fibers are impregnated with said elastomer: said primary fibers are embedded within said elastomer.
14 . (canceled)
15 . The intermediate transfer member of claim 11 , wherein a said supporting component is substantially a distinct sheet of said elastomer.
16 . The intermediate transfer member of claim 15 , wherein said primary fibers are in direct physical contact with said sheet of said elastomer.
17 . The intermediate transfer member of claim 10 , wherein a said supporting component comprises secondary fibers, distinct from said primary fibers.
18 . The intermediate transfer member of claim 17 , wherein at least one of the following is true: (a) said secondary fibers are oriented substantially not-parallel to said primary fibers; (b) said secondary fibers are oriented to diverge by at least about 30° from parallel to said primary fibers; (c) said secondary fibers are oriented substantially parallel to said lateral direction.
19 - 20 . (canceled)
21 . The intermediate transfer member of claim 18 , wherein said secondary fibers are substantially elastic.
22 . The intermediate transfer member of any claim 10 , a said supporting component comprising primary and secondary fibers aggregated together to constitute a single ply of fabric.
23 . The intermediate transfer member of claim 22 , wherein said primary fibers and said secondary fibers are aggregated together by weaving, thereby together constituting a woven fabric.
24 . The intermediate transfer member of claim 17 , wherein at least one of the following is true: (a) at least some of said primary fibers are located in a distinct ply of primary fibers substantially devoid of said secondary fibers; (b) at least some of said secondary fibers are located in a distinct ply of secondary fibers substantially devoid of said primary fibers.
25 . (canceled)
26 . An intermediate transfer member for use with a printing system, comprising:
a body having a first surface; and
a release layer, having an image transfer surface, attached to said body through said first surface;
wherein said release layer is of a condensation-cured elastomer comprising crosslinked silanol-terminated and/or silane-terminated polymers;
wherein said elastomer includes at least 80% by weight of
a silanol-terminated polymer and/or silane-terminated polymer selected from the group consisting of
a silanol and/or silane terminated polydialkylsiloxane,
a silanol and/or silane terminated polyalkylarylsiloxane,
a silanol and/or silane terminated polydiarylsiloxane and combinations thereof; and wherein said elastomer is substantially devoid of at least one of carbon black and paraffin.
27 . A method of preparing a release layer of an intermediate transfer member for use with a printing system, comprising:
a) forming a layer of a curable polymer composition at a thickness of not more than about 200 micrometers as an incipient release layer; and
b) curing the layer of curable polymer composition, thereby preparing a release layer wherein the curable polymer composition includes:
at least 80% by weight of a silanol-terminated polymer and/or silane-terminated polymer selected from the group consisting of:
a silanol and/or silane terminated polydialkylsiloxane,
a silanol and/or silane terminated polyalkylarylsiloxane,
a silanol and/or silane terminated polydiarylsiloxane and combinations thereof a cross-linker;
a fast-curing heat activated condensation-cure catalyst; and
substantially devoid of at least one of carbon black and paraffin.
28 - 31 . (canceled)