Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Composite having voids in a component
Reexamination Certificate
1997-10-09
2001-06-19
Hess, Bruce H. (Department: 1774)
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Composite having voids in a component
C428S195100, C428S327000
Reexamination Certificate
active
06248432
ABSTRACT:
BACKGROUND OF THE INVENTION
Field of the Invention
The present invention relates to a recording sheet for an ink jet-recording system. More particularly, the present invention relates to an ink jet recording sheet having an enhanced jet ink-fixing property and capable of recording thereon stable ink images which have excellent water resistance and light fastness. Therefore, the ink in the recorded images does not blot from the images even in a high humidity atmosphere and the recorded images are not deteriorated even when exposed to light irradiation over a long time.
In an embodiment of the present invention, the ink jet recording sheet has an ink receiving layer capable of being heat-sealed with a heat-sealant tape or stamp, and this is usable as a packing sheet for an article and the packed article can be sealed by the heat sealant tape or stamp.
In another embodiment of the present invention, the ink jet receiving sheet has an ink receiving layer formed on a surface of a support sheet and a heat-bonding layer formed on the opposite surface of the support sheet, and is usable as a packing sheet, sealing portions of the packing sheet being capable of being heat-sealed between the ink-receiving layer surface and the opposite heat-bonding layer surface.
Description of the Related Art
It is known that a conventional ink jet recording sheet is prepared by impregnating a support sheet with a mixture of inorganic particles, which can absorb a recording ink, with a binder or by coating a surface of a support sheet with a coating liquid containing inorganic particles, which can absorb a recording ink, and a binder, by using a blade coater, a bar coater, or a roll coater, to form an ink receiving layer on the surface of the support sheet. Accompanying the recent expansion in use of the ink jet recording sheet, the resultant ink images formed on an ink receiving layer of the ink jet recording sheet are required to exhibit enhanced water resistance and light fastness.
However, the conventional ink receiving layer of the ink jet recording sheet, comprising inorganic pigment particles and a binder is disadvantageous in that the ink images recorded on the ink receiving layer exhibit not only an unsatisfactory light fastness but also an insufficient water resistance and a poor resistance to bloting of the ink when left to stand in a high humidity atmosphere.
Also, since the conventional ink receiving layer formed on a surface of a support sheet and comprising the inorganic pigment particles has an insufficient heat-sealing property, when the ink jet recording sheet is used as a packing sheet and sealing end portions of the packing sheet are sealed by a heat-sealant, the ink receiving layer surface cannot be heat-bonded to an opposite surface of the support sheet, unless the opposite surface of the support sheet has a heat-bonding property. Namely, when the opposite surface of the support sheet has no heat-bonding property, the ink jet recording sheet used as a packing sheet cannot be sealed at the sealing end portions thereof by a heat-sealing method.
SUMMARY OF THE INVENTION
An object of the present invention is to provide an ink jet recording sheet having a good ink-fixing property, capable of recording thereon stable ink images having excellent water resistance and light fastness, and thus exhibiting a superior resistance to blotting of ink even in a high humidity atmosphere and a high resistance to deterioration in color even when exposed to light irradiation over a long time.
Another object of the present invention is to provide an ink jet recording sheet having an ink receiving layer formed on a support sheet and capable of being heat-sealed.
Still another object of the present invention is to provide an ink jet recording sheet having an ink receiving layer formed on a surface of a support sheet and capable of being heat-sealed with the opposite surface of the support sheet.
The above-mentioned objects can be attained by the ink jet recording sheet of the present invention which comprises a support sheet, and an ink receiving layer formed on a surface of the support sheet and comprising fine particles of water-insoluble, amino group-containing resin having a total amine value of 5 to 500 and mixed with a binder.
The water-insoluble, amino group-containing resin usable for the present invention preferably has a glass transition temperature of 15 to 250° C.
In the ink jet recording sheet of the present invention, the water-insoluble, amine group-containing resin is preferably a reaction product of a compound having at least one epoxy group per molecule thereof with a compound having at least one amino group per molecule thereof.
Also, the epoxy group-containing compound is preferably selected from those of the formulae (1) and (2):
wherein —O—R
1
—O— and —O—R
2
—O— respectively and independently from each other represent a member selected from the group consisting of divalent residues of aromatic dihydoxyaryl compounds and divalent residues of aliphatic dihydric alcohols which may contain at least one aryl moiety; k and l respectively and independently from each other represent an integer of 0 or 1 or more; —O—R
3
represents a residue of a monohydroxyaryl compound; Y
1
and Y
2
respectively and independently from each other represent a member selected from the group consisting of a hydrogen atom and halogen atoms, glycidyl ether groups, alkyl groups preferably having 1 to 20 carbon atoms, aryl groups preferably having 6 to 26 carbon atoms; and aralkyl groups preferably having 7 to 27 carbon atoms, the alkyl, aryl and aralkyl groups respectively may be substituted with at least one glycidyl moiety; and n and m respectively and independently from each other represent an integer of 0 or 1 or more.
In the ink jet recording sheet of the present invention, the ink receiving layer formed on a surface of a support sheet and comprising fine particles of a water-insoluble, amino group-containing resin having a total amine value of 5 to 500 and mixed with a binder, can be heat-bonded with the opposite surface of the support sheet.
In the heat bondable ink receiving layer of the heat-bonding ink jet recording sheet of the present invention, the water-insoluble, amino group-containing resin is preferably a reaction product of a compound having at least one epoxy group per molecule thereof with a compound having at least one amino group per molecule thereof.
The epoxy group-containing compound is preferably selected from those of the formulae (1) and (2):
wherein —O—R
1
—O— and —O—R
2
—O— respectively and independently from each other represent a member selected from the group consisting of divalent residues of aromatic dihydoxyl compounds and divalent residues of aliphatic dihydric alcohols; k and l respectively and independently from each other represent an integer of 0 or 1 or more; —O—R
3
— represents a residue of monohydroxyaryl compound; Y
1
and Y
2
respectively and independently from each other represent a member selected from the group consisting of a hydrogen atom, halogen atoms, glycidyl ether groups, alkyl groups preferably having 1 to 20 carbon atoms, aryl groups preferably having 6 to 26 carbon atoms; and aralkyl groups preferably having 7 to 27 carbon atoms, the alkyl, aryl and aralkyl groups respectively may be substituted with at least one glycidyl moiety; and n and m respectively and independently from each other represent an integer of 0 or 1 or more.
DESCRIPTION OF THE PREFERRED EMBODIMENT
In the ink jet recording sheet of the present invention, as a support sheet on which an ink receiving layer is formed, plastic films, for example, polyethylene, polypropylene, polyethylene terephthalate, polycarbonate, polyphenylene sulfide, polyetherimide, polysulfone, polystyrene, nylon, cellulose diacetate and cellulose triacetate films, paper sheets, nonwoven fabrics and laminates of the above mentioned sheet materials.
By using a support sheet having a hot melt bonding property or by forming a coating layer having a hot melt bonding property on the opposite surface of the support she
Asakage Hideyasu
Hiraki Motoko
Moronuki Katsumi
Nakamura Yoshiaki
Arent Fox Kintner Plotkin & Kahn
Grendzynski Michael
Hess Bruce H.
Oji Paper Co. Ltd.
LandOfFree
Ink jet recording sheet does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Ink jet recording sheet, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ink jet recording sheet will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2463524