US4460637A
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Ink jet recording sheet
Assignee: Mitsubishi Paper Mills Ltd
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Filing: 1982-09-30
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Granted: 1984-07-17
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Expires: 2002-09-30
Abstract
Abstract An ink jet recording sheet comprising a support and one or more ink receptive layers disposed thereon, which is characterized by being such that the pore radius distribution curve of the uppermost layer shows at least one peak at 0.2 to 10 mu m and that of ink receptive layers as a whole shows at least two peaks, one at 0.2 to 10 m mu and the other at 0.05 m mu or below. Such a sheet brings about many advantages such as a high density and a bright color of the recorded image or letters, a high rate of ink absorption with a minimum of fethering, and the like.
Inventors
- 👤 Shigehiko Miyamoto
- 👤 Yoshinobu Watanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:43
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/50; B41M5/52; B41M7/00; D; D21; D21H; D21H19/00; D21H19/36; D21H19/38; D21H19/385; B41M2205/00; B41M2205/38; B41M5/502; B41M5/506; B41M5/508; B41M5/5218; B41M5/5254; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24893; Y10T428/24901; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/24975; Y10T428/249921; Y10T428/249953; Y10T428/249981; Y10T428/249986; Y10T428/25; Y10T428/254; Y10T428/256; Y10T428/257; Y10T428/258; Y10T428/259; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265; Y10T428/31
Claims Analysis
Total Claims: 36
Claim 1
Independent Claim
66 words
An ink jet recording sheet comprising a support and one or more ink receptive layers disposed thereon, wherein the pore radius distribution curve of the uppermost ink receptive layer shows a peak at 0.2 to 10 μm and that of the ink receptive layer or layers as a whole shows two peaks, one at 0.2 to 10 μm and the other at 0.05 μm or below.
Claim 2
Dependent Claim
66 words
An ink jet recording sheet comprising a support and one or more ink receptive layers disposed thereon, wherein the pore radius distribution curve of the uppermost ink receptive layer shows a peak at 0.2 to 10 μm and that of the ink receptive layer or layers as a whole shows two peaks, one at 0.2 to 10 μm and the other at 0.05 μm or below.
Claim 3
Dependent Claim
43 words
An ink jet recording sheet according to claim 1, wherein the ink receptive layer is a single layer and contains agglomerates of 1 to 50 μm in average diameter produced by agglomerating primary particles of 0.20 μm or below in average particle diameter.
Claim 4
Dependent Claim
35 words
An ink jet recording sheet according to claim 2, wherein the primary particle is selected from the group consisting of synthetic silica, aluminum hydroxide, synthetic alumina, precipitated calcium carbonate, zinc oxide, and synthetic organic pigments.
Claim 5
Dependent Claim
35 words
An ink jet recording sheet according to claim 2, wherein the agglomerates are those which are produced by agglomerating colloidal particles of 0.10 μm or below in average particle diameter and wet-grinding the resulting agglomerates.
Claim 6
Dependent Claim
25 words
An ink jet recording sheet according to claim 4, wherein the colloidal particle is colloidal silica produced by the wet process or colloidal calcium carbonate.
Claim 7
Dependent Claim
40 words
An ink jet recording sheet according to claim 2, wherein the agglomerates are those which are produced by adding a binder to primary particles of 0.1 to 0.2 μm in average particle diameter, drying the mixture, then grinding and classifying.
Claim 8
Dependent Claim
35 words
An ink jet recording sheet according to claim 6, wherein the primary particle is selected from the group consisting of colloidal silica produced by the wet process, precipitated calcium carbonate, and superfine zinc oxide powder.
Claim 9
Dependent Claim
32 words
An ink jet recording sheet according to claim 2, wherein the agglomerates are those which are produced by drying a hydrogel to transform it into xerogel, then grinding the xerogel, and classifying.
Claim 10
Dependent Claim
26 words
An ink jet recording sheet according to claim 2, wherein the agglomerates are those which are produced by granulating a hydrogel as such and then drying.
Claim 11
Dependent Claim
31 words
An ink jet recording sheet according to claim 8 or 9, wherein the material forming the hydrogel is selected from the group consisting of aluminum hydroxide, alumina, silica, and magnesium oxide.
Claim 12
Dependent Claim
38 words
An ink jet recording sheet according to claim 2, wherein the agglomerates are those which are produced by transforming a hydrogel to xerogel by drying, baking the xerogel to calcined particles, then grinding the calcined particles, and classifying.
Claim 13
Dependent Claim
39 words
An ink jet recording sheet according to claim 2, wherein the agglomerates are those which are produced by granulating a hydrogel as such, drying the granulated bydrogel to form a xerogel, and burning the xerogel to form calcined particles.
Claim 14
Dependent Claim
46 words
An ink jet recording sheet according to claim 2, wherein the agglomerates are those which are produced by agglomerating an emulsified polymer having an average particle diameter of 0.5 μm or below and a glass transition temperature of 40° C. or above or a thermosetting polymer.
Claim 15
Dependent Claim
22 words
An ink jet recording sheet according to claim 13, wherein the emulsified polymer is an emulsified polystyrene or an emulsified polyacrylic acid.
Claim 16
Dependent Claim
17 words
An ink jet recording sheet according to claim 13, wherein the thermosetting polymer is a urea-formaldehyde resin.
Claim 17
Dependent Claim
31 words
An ink jet recording sheet according to claim 2, wherein the agglomerates are those which are produced by polymerizing a urea-formaldehyde resin in a suspension containing primary particles, urea and formaldehyde.
Claim 18
Dependent Claim
24 words
An ink jet recording sheet according to claim 16, wherein the agglomerates are further baked to yield particles consisting of a calcined inorganic substance.
Claim 19
Dependent Claim
21 words
An ink jet recording sheet according to claim 16 or 17, wherein the primary particle is colloidal silica or colloidal alumina.
Claim 20
Dependent Claim
22 words
An ink jet recording sheet according to claim 2, wherein the thickness of the ink receptive layer is 1 to 100 μm.
Claim 21
Dependent Claim
22 words
An ink jet recording sheet according to claim 19, wherein the thickness of the ink receptive layer is 5 to 40 μm.
Claim 22
Dependent Claim
24 words
An ink jet recording sheet according to claim 2, wherein the cumulative void volume of the ink receptive layer is 0.3 ml/g or above.
Claim 23
Dependent Claim
29 words
An ink jet recording sheet according to claim 21, wherein the void volume of pores having a pore radius of 0.05 μm or less is 0.2 ml/g or more.
Claim 24
Dependent Claim
69 words
An ink jet recording sheet according to claim 1, wherein the ink receptive layer is composed of two layers of which the lower layer disposed on a support has 0.2 ml/g or more of void volume of pores having a pore radius of 0.05 μm or less and the top layer disposed over said lower layer has a peak of pore radius distribution curve at 0.2 to 10 μm.
Claim 25
Dependent Claim
29 words
An ink jet recording sheet according to claim 23, wherein the top layer contains a pigment in particle form having an average particle diameter of 1 to 50 μm.
Claim 26
Dependent Claim
29 words
An ink jet recording sheet according to claim 23, wherein the lower layer disposed on the support contains a pigment having a particle diameter of 0.2 μm or less.
Claim 27
Dependent Claim
36 words
An ink jet recording sheet according to claim 23, wherein the pore radius distribution curve of the uppermost layer has two peaks, one at 0.2 to 10 μm and the other at 0.05 μm or below..
Claim 28
Dependent Claim
23 words
An ink jet recording sheet according to claim 26, wherein the uppermost layer contains agglomerated particles prepared by the agglomeration of primary particles.
Claim 29
Dependent Claim
42 words
An ink jet recording sheet according to claim 26, wherein the uppermost layer contains a pigment in particle form having an average particle diameter of 1 to 50 μm in addition to the agglomerated particles prepared by the agglomeration of primary particles.
Claim 30
Dependent Claim
21 words
An ink jet recording sheet according to claim 23, wherein the uppermost layer has a thickness of 5 to 20 μm.
Claim 31
Dependent Claim
25 words
An ink jet recording sheet according to claim 23, wherein the intermediate layer disposed on the support has a thickness of 10 μm or more.
Claim 32
Dependent Claim
40 words
An ink jet recording paper according to claim 1, wherein a single ink receptive layer is disposed on a support having 0.2 ml/g or more of void volume of pores having an average pore radius of 0.05 μ or below.
Claim 33
Dependent Claim
30 words
An ink jet recording sheet according to claim 31, wherein the support is selected from the group consisting of thermoplastic synthetic resin films, glass sheets, and paper incorporated with fillers.
Claim 34
Dependent Claim
25 words
An ink jet recording sheet according to claim 1, wherein the ink receptive layer is composed of a pigment in particle form and an adhesive.
Claim 35
Dependent Claim
24 words
An ink jet recording sheet according to claim 33, wherein the weight ratio of the adhesive to the pigment in particle form is 2-50:100.
Claim 36
Dependent Claim
34 words
An ink jet recording sheet according to claim 1, wherein the recording sheet is further treated by passing through a roll nip under application of heat and pressure to impart smoothness to the sheet.
References Cited (Backward Citations)
US4269891A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-17 | 1988-01-16 | 1988-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-17 | 1992-01-16 | 1992-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-17 | 1996-01-16 | 1996-07-17 | $7700.00 | Window Closed / Lapsed |