US4444839A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-soluble label, a process for its preparation and its use
Assignee: Hoechst AG
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Filing: 1981-10-02
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Granted: 1984-04-24
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Expires: 2001-10-02
Abstract
Abstract A label essentially comprises a top layer which can be printed and/or inscribed and a water-soluble adhesive layer. The adhesive layer can also be protected by a covering layer. The top layer is formed from polyvinyl alcohol which is preferably insoluble in cold water but soluble in hot water. The adhesive layer comprises a synthetic adhesive which is soluble in water and represents, in particular, a contact adhesive or permanent adhesive. The label is resistant to the action of cold water but is soluble in hot water, and is suitable for labeling containers with a smooth surface.
Inventors
- 👤 Joachim Dudzik
- 👤 Winfried Dudzik
- 👤 Wolfgang Zimmermann
- 👤 Gunther Pospich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:49
CPC Classifications
G; G09; G09F; G09F3/00; G09F3/08; G09F3/10; G09F3/02; G09F2003/023; G09F2003/0233; G09F2003/0242; G09F2003/0255; G09F2003/0272; G09F2003/0273; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265; Y10T428/27; Y10T428/28; Y10T428/2813; Y10T428/2817; Y10T428/2826; Y10T428/283; Y10T428/2839; Y10T428/2848; Y10T428/2852; Y10T428/2878
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
78 words
A water-soluble label comprising a top layer comprised of polyvinyl alcohol having a viscosity of from 4 to 70 mPa.s, an ester number of 10 to 250 mg KOH/g and a thickness of from 10 to 150 μm, said top layer adapted to be printed or inscribed thereon; and a water-soluble adhesive layer which is adjacent said top layer is a vinyl polymer and has a weight per unit area of from 5 to 25 g/m 2 .
Claim 2
Dependent Claim
78 words
A water-soluble label comprising a top layer comprised of polyvinyl alcohol having a viscosity of from 4 to 70 mPa.s, an ester number of 10 to 250 mg KOH/g and a thickness of from 10 to 150 μm, said top layer adapted to be printed or inscribed thereon; and a water-soluble adhesive layer which is adjacent said top layer is a vinyl polymer and has a weight per unit area of from 5 to 25 g/m 2 .
Claim 3
Dependent Claim
25 words
A label as claimed in claim 1, wherein the polyvinyl alcohol forming the top layer is insoluble in cold water and soluble in hot water.
Claim 4
Dependent Claim
25 words
A label as claimed in claim 1, wherein the top layer retains its shape in cold water and is capable of shrinking in hot water.
Claim 5
Dependent Claim
16 words
The label, as claimed in claim 1, further including a protective layer covering the adhesive layer.
Claim 6
Dependent Claim
18 words
A label as claimed in claim 1, wherein the adhesive is a contact adhesive or a permanent adhesive.
Claim 7
Dependent Claim
20 words
A label as claimed in claim 5, wherein the permanent adhesive is capable of being activated by water or heat.
Claim 8
Dependent Claim
20 words
A label as claimed in claim 1, wherein the polyvinyl alcohol forming the top layer is soluble in cold water.
Claim 9
Dependent Claim
22 words
A label as claimed in claim 7, wherein the polyvinyl alcohol forming the top layer has a retarded solubility in cold water.
Claim 10
Dependent Claim
95 words
A process for the preparation of a water-soluble label which is adapted to be printed or inscribed thereon comprising coating a film composed of polyvinyl alcohol having a viscosity of from 4 to 70 mPa.s and an ester number of from 10 to 250 mg KOH/g, said film having a thickness of from 10 to 150 μm, with an adhesive layer containing a vinyl polymer, said adhesive layer having a weight per unit area of from 5 to 25 g/m 2 to obtain a laminated sheet; and stamping out a label from the laminated sheet.
Claim 11
Dependent Claim
95 words
A process for the preparation of a water-soluble label which is adapted to be printed or inscribed thereon comprising coating a film composed of polyvinyl alcohol having a viscosity of from 4 to 70 mPa.s and an ester number of from 10 to 250 mg KOH/g, said film having a thickness of from 10 to 150 μm, with an adhesive layer containing a vinyl polymer, said adhesive layer having a weight per unit area of from 5 to 25 g/m 2 to obtain a laminated sheet; and stamping out a label from the laminated sheet.
Claim 12
Dependent Claim
18 words
The process, as claimed in claim 9, further comprising applying a protective covering layer to the adhesive layer.
Claim 13
Dependent Claim
35 words
A process for labeling a container which has a substantially smooth surface and is periodically subjected to the action of water which comprises applying the water soluble label according to claim 1 to said container.
References Cited (Backward Citations)
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US2654170A
Cited
US2793966A
Cited
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Cited
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Cited
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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) | 1987-04-24 | 1987-10-24 | 1988-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-24 | 1991-10-24 | 1992-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-24 | 1995-10-24 | 1996-04-24 | $7700.00 | Window Closed / Lapsed |