US6811837B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Porous resin film
Assignee: Yupo Corp
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Filing: 2002-06-10
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Granted: 2004-11-02
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Expires: 2022-06-10
Abstract
Abstract The invention provides a porous resin film having a good absorption of water content as a solvent for aqueous ink or aqueous paste and a recording medium comprising the porous resin film. The recording medium is characterized by the capability of absorbing an ink without density unevenness even during ink jet recording if the ejected amount of ink is great. The invention lies in a porous resin film comprising: a thermoplastic resin in an amount of 30 to 90% by weight; and an inorganic and/or organic finely divided powder in an amount of 10 to 70% by weight, wherein the inorganic and/or organic finely divided powder is surface-treated with a surface treating agent (A) made of a copolymer of diallylamine salt or alkyl diallylamine salt (a1) with a nonionic hydrophilic vinyl monomer (a2) and an anionic surface treating agent (B), and the porous resin film has a liquid absorption capacity of not smaller than 0.5 ml/m<2 >as measured by "Japan TAPPI No. 51-87".
Inventors
- 👤 Yasuo Iwasa
- 👤 Seiichiro Iida
- 👤 Nobuhiro Shibuya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 02:59
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/50; B41M5/52; B41M5/0041; B41M5/0064; B41M5/502; B41M5/508; B41M2205/00; B41M2205/12; B41M5/5218; B41M5/5245; B41M5/5254
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
121 words
A porous resin film comprising: a thermoplastic resin in an amount of 30 to 90% by weight; and at least one of an inorganic or organic finely divided powder having an average particle diameter of from 3 to 20 μm in an amount of 10 to 70% by weight, wherein the finely divided powder is surface-treated with (A) a surface treating agent comprising a copolymer comprising copolymerized units of at least one of (a1) a diallylamine salt or an alkyl diallylamine salt and (a2) a nonionic hydrophilic vinyl monomer, and (B) an anionic surface treating agent, and the porous resin film has a liquid absorption capacity of not smaller than 0.5 ml/m 2 as measured by Japan TAPPI No. 5 1-87.
Claim 2
Dependent Claim
121 words
A porous resin film comprising: a thermoplastic resin in an amount of 30 to 90% by weight; and at least one of an inorganic or organic finely divided powder having an average particle diameter of from 3 to 20 μm in an amount of 10 to 70% by weight, wherein the finely divided powder is surface-treated with (A) a surface treating agent comprising a copolymer comprising copolymerized units of at least one of (a1) a diallylamine salt or an alkyl diallylamine salt and (a2) a nonionic hydrophilic vinyl monomer, and (B) an anionic surface treating agent, and the porous resin film has a liquid absorption capacity of not smaller than 0.5 ml/m 2 as measured by Japan TAPPI No. 5 1-87.
Claim 3
Dependent Claim
22 words
The porous resin film as claimed in claim 1 , which has an average water contact angle of not greater than 110°.
Claim 4
Dependent Claim
19 words
The porous resin film as claimed in claim 1 , which has a porosity of not smaller than 10%.
Claim 5
Dependent Claim
18 words
The porous resin film as claimed in claim 1 , wherein the thermoplastic resin is a polyolefin resin.
Claim 6
Dependent Claim
75 words
The porous resin film as claimed in claim 1 , wherein the content of the thermoplastic resin is from 30 to 90% by weight, the content of the surface-treated finely divided powder is from 10 to 70% by weight, and the amount of the surface treating agent (A) and the anionic surface treating agent (B) are each from 0.01 to 10 parts by weight based on 100 parts by weight of the finely divided powder.
Claim 7
Dependent Claim
13 words
The porous resin film as claimed in claim 1 , which is stretched.
Claim 8
Dependent Claim
19 words
The porous resin film as claimed in claim 1 , which is subjected to oxidation on the surface thereof.
Claim 9
Dependent Claim
22 words
A laminate comprising a porous resin film as claimed in claim 1 provided on at least one surface of a substrate layer.
Claim 10
Dependent Claim
14 words
A recording medium comprising a porous resin film as claimed in claim 1 .
Claim 11
Dependent Claim
16 words
An ink jet recording medium comprising a porous resin film as claimed in claim 1 .
Claim 12
Dependent Claim
26 words
An ink jet recording medium comprising an ink-receptive layer provided on at least one surface of a porous resin film as claimed in claim 10 .
Claim 13
Dependent Claim
30 words
The ink jet recording medium as claimed in claim 11 , wherein the ink-receptive layer has a surface gloss of not smaller than 40% measured at 60° according to JIS-Z8741.
Claim 14
Dependent Claim
61 words
The ink jet recording medium as claimed in claim 11 , wherein the ink-receptive layer comprises an inorganic filler having an average particle diameter of not greater than 350 nm in an amount of from 70 to 95% by weight and a binder resin in an amount of from 70 to 95% by weight and from 5 to 30% by weight.
Claim 15
Dependent Claim
30 words
The inkjet recording medium as claimed in claim 13 , wherein the inorganic filler comprises at least one selected from the group consisting of amorphous silica, alumina and alumina hydrate.
Claim 16
Dependent Claim
32 words
The ink jet recording medium as claimed in claim 14 , wherein the amorphous silica is obtained by agglomerating primary particles having an average diameter of from 1 nm to 10 nm.
Claim 17
Dependent Claim
20 words
The ink jet recording medium as claimed in claim 14 , wherein the amorphous silica is a cationically treated silica.
Claim 18
Dependent Claim
16 words
The ink jet recording medium as claimed in claim 14 , wherein the alumina is δ-alumina.
Claim 19
Dependent Claim
17 words
The ink jet recording medium as claimed in claim 14 , wherein the alumina hydrate is pseudo-boehmite.
Claim 20
Dependent Claim
47 words
The ink jet recording medium as claimed in claim 11 , wherein the ink-receptive layer comprises a crosslinking agent in an amount of from 1 to 20% by weight and an ink fixing agent incorporated therein each in an amount of from 1 to 20% by weight.
Claim 21
Dependent Claim
38 words
The ink jet recording medium as claimed in claim 11 , further comprising a top coat layer provided on the ink-receptive layer and having a surface gloss of not smaller than 50% measured at 60° according to JIS-Z8741.
Claim 22
Dependent Claim
55 words
The ink jet recording medium as claimed in claim 20 , wherein the top coat layer comprises an inorganic filler having an average particle diameter of not greater than 350 nm in an amount of from 70 to 95% by weight and a binder resin in an amount of from 5 to 30% by weight.
Claim 23
Dependent Claim
33 words
The ink jet recording medium as claimed in claim 20 , wherein the top coat layer comprises an ink fixing agent incorporated therein in an amount of from 1 to 20% by weight.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2007-11-02 | 2008-05-03 | 2008-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2011-11-02 | 2012-05-03 | 2012-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2015-11-02 | 2016-05-03 | 2016-11-02 | $7700.00 | Window Closed / Lapsed |