CA1170118A - Lift-off element - Google Patents
Lift-off elementInfo
- Publication number
- CA1170118A CA1170118A CA000379362A CA379362A CA1170118A CA 1170118 A CA1170118 A CA 1170118A CA 000379362 A CA000379362 A CA 000379362A CA 379362 A CA379362 A CA 379362A CA 1170118 A CA1170118 A CA 1170118A
- Authority
- CA
- Canada
- Prior art keywords
- lift
- layer
- resin
- oleic acid
- range
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J177/00—Adhesives based on polyamides obtained by reactions forming a carboxylic amide link in the main chain; Adhesives based on derivatives of such polymers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J29/00—Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
- B41J29/26—Devices, non-fluid media or methods for cancelling, correcting errors, underscoring or ruling
- B41J29/36—Devices, non-fluid media or methods for cancelling, correcting errors, underscoring or ruling for cancelling or correcting errors by overprinting
- B41J29/367—Devices, non-fluid media or methods for cancelling, correcting errors, underscoring or ruling for cancelling or correcting errors by overprinting sheet media carrying a pigmented transferable correction layer
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D9/00—Chemical paint or ink removers
Abstract
Abstract of the Disclosure A pressure-activated lift-off element in which a lift-off layer comprises a combination of at least one solid polyamide adhesive resin and oleic acid.
Description
v~
Field of the Invention This invention relates to lift-off elements, particularly tapes, for use in the correction of typed erxors.
Background of the Invention Several methods are known for the correction of typed errors. One such method is disclosed in Taylor et al. U.S. Patent No. 4,093,772, the principal object o~
which was to provide a tack-free lift-off tape which, be-cause of the inherent nature of the coating, eliminatedthe tape's sticking to a ribbon, cardholder, paper or to itself when folded over. To accomplish this Taylor provided the tape base layer with a non-tacky coating composed of an amide type wax, resins, and plastici~ers in a suitable sol-vent combination.
Summary of the Invention I have discovered that providing on a base layer a coating comprising a solid polyamide adhesive resin and oleic acid provides a highly useful lift-off element of the type free from problems of stic]cing to itself and other things.
In preferred embodiments both a binder polyamide adhesive resin and a wetting-softening polyamide adhesive resin are used; the oleic acid is Oleic Acid No. 38 (Mil-waukee Solvents & Chemicals Corp.); and there is included a small amount of a rosin-derived tackifying resin.
~ ~ 7~
Preferred Embodiment I turn now to a description of the drawings and the structure and opera-tion of a preferred embodiment.
rawings Fig. 1 is a view of a self-wound~ partially un-wound roll of lift-off tape.
Fig. 2 is a cross-sectiona] view taken at 2-2 of Fig. 1.
Structure There i9 shown in the drawings a self-wound roll of lift-off tape 10 comprising polyester backing layer 12 and lift-off layer 14.
The lift-off layer 14 has the following composition:
~ By Weiqht Component (Solid~ Parts Emerez 1566 44 4 40 Emerez~1557A 22.2 20 -Oleic Acid #38 22.2 20 ~,~
Foral 85 _11.2 10 To-tal100.0 90 It was deposited using ordinary solvent application tech-niques from the following coating solution:
~ t~ d~ k ~7Vl~
% By Weight Component(Coatlng Solution~
Emerez 1566 17.8 Emerez 1577A 8.9 Oleic Acid No. 38 8.9 Foral 85 4 5 n-Butyl Alcohol 3~.1 Toluene 10.8 1,1,1, Trichloroethane 10.8 Water 6.2 Total 100.0 Emerez 1566 (Emery Industries, Inc.) is the binder solid polyamide adhesive resin in the combination. It is characterized by a softening point of about 165-170C, viscosity of 60-90, poise at 190~, a 300% elongation at break, an amine value max of 1.0, and an acid value max of 12Ø The binder polyamide adhesive resin serves to bind together all the components, helps to provide resistance to creep under roll pressure, and causes the layer to remain non-tacky without exuding oleic acid at levels of the latter giving desirable lift-off results.
Oleic acid No. 38 is a commercial distillate of saturated and unsaturated fatty acids, approximately as follows:
Myristic C-14 3.0 Palmitic C-16 5.0 Stearic C-18 Trace Myristoleic C-14 3.0 Palmitoleic C-16 6.0 Oleic C-18 73.0 Linoleic C-18 9.0 100 . O
This material has the following properties: Iodine Value, 89-93; Acid Value, 199-205; and Sap Va]ue, 199-204. The oleic acid greatly enhances lift-off properties of the in-vention.
The wetting-softening polyamide adhesive resin Emerez 1557~ (Emery Industries, Inc.) is a high-amine value material with a softening point of 145C, viscosit~ of 5, poise at 90C, and a 250% elongation at break, an Amine value max between 55 and 70, and an Acid value max of 2Ø
Not only does it contribute to desirable wetting and soften-ing characteristics of the combination, but it enhances adhesion of the lift-off layer to the polyester tape back-ing and improves lift-off properties.
The rosin-derived tackifying resin is Foral 85 (Hercules Incorporated), a glycerol ester of hydrogenated rosin having a softening point of 82C, an Acid No. of 9, and good solubility in Toluene. This material's contribu-tion to the formula-tion is to promote adhesion of the lift-off layer to the polyester tape backing.
The ingredients maintain a solution in the solvent system specified for a practical length of time, although ~ V ~ l ~
there is a tendency to be formed a reversible gel, undesir-able for use in coating, upon undue s-tanding.
l'he backing layer 12 has a thickness of .00150 inch The thickness of the lift-off layer 14 is .001 inch. There is on the side of base 12 opposed to layer 14 a release coat-ing (W. H. srady release coating #3608).
Operation The tape may be used in the way well-known for use of lift-off tapes in which the liEt-off layer is free from any bothersome tendency to stick to things. A roll ac-cording to the invention has high lift-off ability, good freedom from sticking, good adhesion to the support tape, and good roll integrity.
Other Embodiments The ingredients may be varied within the following ranges:
Binding resin 35-45 Oleic acid 18-25 Wetting-softening resin 15-25 Tackifying resin5-15 Too much binding resin detracts from adhesion to tape backing and lift-off; too little causes coating creeping with time and temperature. Too little oleic acid degrades lift-off properties; too much results in oleic acid exuding and coating creep under temperature and pressure. Too little - ~ 17~ ~ 8 rosin-derived tackifying resin results in poor adhesion to the backing layer; too much causes exudation of oleic acid and rosin-based tackifier.
The invention may also be used in hot-melt deposi-tions.
Field of the Invention This invention relates to lift-off elements, particularly tapes, for use in the correction of typed erxors.
Background of the Invention Several methods are known for the correction of typed errors. One such method is disclosed in Taylor et al. U.S. Patent No. 4,093,772, the principal object o~
which was to provide a tack-free lift-off tape which, be-cause of the inherent nature of the coating, eliminatedthe tape's sticking to a ribbon, cardholder, paper or to itself when folded over. To accomplish this Taylor provided the tape base layer with a non-tacky coating composed of an amide type wax, resins, and plastici~ers in a suitable sol-vent combination.
Summary of the Invention I have discovered that providing on a base layer a coating comprising a solid polyamide adhesive resin and oleic acid provides a highly useful lift-off element of the type free from problems of stic]cing to itself and other things.
In preferred embodiments both a binder polyamide adhesive resin and a wetting-softening polyamide adhesive resin are used; the oleic acid is Oleic Acid No. 38 (Mil-waukee Solvents & Chemicals Corp.); and there is included a small amount of a rosin-derived tackifying resin.
~ ~ 7~
Preferred Embodiment I turn now to a description of the drawings and the structure and opera-tion of a preferred embodiment.
rawings Fig. 1 is a view of a self-wound~ partially un-wound roll of lift-off tape.
Fig. 2 is a cross-sectiona] view taken at 2-2 of Fig. 1.
Structure There i9 shown in the drawings a self-wound roll of lift-off tape 10 comprising polyester backing layer 12 and lift-off layer 14.
The lift-off layer 14 has the following composition:
~ By Weiqht Component (Solid~ Parts Emerez 1566 44 4 40 Emerez~1557A 22.2 20 -Oleic Acid #38 22.2 20 ~,~
Foral 85 _11.2 10 To-tal100.0 90 It was deposited using ordinary solvent application tech-niques from the following coating solution:
~ t~ d~ k ~7Vl~
% By Weight Component(Coatlng Solution~
Emerez 1566 17.8 Emerez 1577A 8.9 Oleic Acid No. 38 8.9 Foral 85 4 5 n-Butyl Alcohol 3~.1 Toluene 10.8 1,1,1, Trichloroethane 10.8 Water 6.2 Total 100.0 Emerez 1566 (Emery Industries, Inc.) is the binder solid polyamide adhesive resin in the combination. It is characterized by a softening point of about 165-170C, viscosity of 60-90, poise at 190~, a 300% elongation at break, an amine value max of 1.0, and an acid value max of 12Ø The binder polyamide adhesive resin serves to bind together all the components, helps to provide resistance to creep under roll pressure, and causes the layer to remain non-tacky without exuding oleic acid at levels of the latter giving desirable lift-off results.
Oleic acid No. 38 is a commercial distillate of saturated and unsaturated fatty acids, approximately as follows:
Myristic C-14 3.0 Palmitic C-16 5.0 Stearic C-18 Trace Myristoleic C-14 3.0 Palmitoleic C-16 6.0 Oleic C-18 73.0 Linoleic C-18 9.0 100 . O
This material has the following properties: Iodine Value, 89-93; Acid Value, 199-205; and Sap Va]ue, 199-204. The oleic acid greatly enhances lift-off properties of the in-vention.
The wetting-softening polyamide adhesive resin Emerez 1557~ (Emery Industries, Inc.) is a high-amine value material with a softening point of 145C, viscosit~ of 5, poise at 90C, and a 250% elongation at break, an Amine value max between 55 and 70, and an Acid value max of 2Ø
Not only does it contribute to desirable wetting and soften-ing characteristics of the combination, but it enhances adhesion of the lift-off layer to the polyester tape back-ing and improves lift-off properties.
The rosin-derived tackifying resin is Foral 85 (Hercules Incorporated), a glycerol ester of hydrogenated rosin having a softening point of 82C, an Acid No. of 9, and good solubility in Toluene. This material's contribu-tion to the formula-tion is to promote adhesion of the lift-off layer to the polyester tape backing.
The ingredients maintain a solution in the solvent system specified for a practical length of time, although ~ V ~ l ~
there is a tendency to be formed a reversible gel, undesir-able for use in coating, upon undue s-tanding.
l'he backing layer 12 has a thickness of .00150 inch The thickness of the lift-off layer 14 is .001 inch. There is on the side of base 12 opposed to layer 14 a release coat-ing (W. H. srady release coating #3608).
Operation The tape may be used in the way well-known for use of lift-off tapes in which the liEt-off layer is free from any bothersome tendency to stick to things. A roll ac-cording to the invention has high lift-off ability, good freedom from sticking, good adhesion to the support tape, and good roll integrity.
Other Embodiments The ingredients may be varied within the following ranges:
Binding resin 35-45 Oleic acid 18-25 Wetting-softening resin 15-25 Tackifying resin5-15 Too much binding resin detracts from adhesion to tape backing and lift-off; too little causes coating creeping with time and temperature. Too little oleic acid degrades lift-off properties; too much results in oleic acid exuding and coating creep under temperature and pressure. Too little - ~ 17~ ~ 8 rosin-derived tackifying resin results in poor adhesion to the backing layer; too much causes exudation of oleic acid and rosin-based tackifier.
The invention may also be used in hot-melt deposi-tions.
Claims (6)
1. A lift-off element comprising a backing layer and a lift-off layer, said lift-off layer comprising a binder polyamide adhesive resin having a softening point at a first temperature and oleic acid.
2. The element of claim l which includes also a second, wetting-softening polyamide adhesive resin with a softening point at a second temperature, said second tem-perature being less than said first temperature.
3. The element of claim 2 in which said lift-off layer includes also a tackifying resin.
4. The element of claim 3 in which said tackifying resin is rosin-derived.
5. The element of claim 3 in which said binding resin is present in the amount of a range of 35-45, said oleic acid is present in the amount of a range of 18-25, said wetting-softening resin is present in the amount of a range of 15-25, and said tackifying resin is present in the amount of a range of 5-15.
6. The element of claim 5 in which said element is a roll and said support layer has on an opposed side thereof a layer of release coating.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US16698480A | 1980-07-08 | 1980-07-08 | |
| US166,984 | 1980-07-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1170118A true CA1170118A (en) | 1984-07-03 |
Family
ID=22605465
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000379362A Expired CA1170118A (en) | 1980-07-08 | 1981-06-09 | Lift-off element |
Country Status (3)
| Country | Link |
|---|---|
| CA (1) | CA1170118A (en) |
| DE (1) | DE3126793A1 (en) |
| FR (1) | FR2486453A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4434207A (en) * | 1982-09-16 | 1984-02-28 | International Business Machines Corporation | Radiation hardened lift-off correction medium and process of manufacture |
| FR2553095B1 (en) * | 1983-10-06 | 1987-06-19 | Salkin Andre | PROCESS FOR FORMULATING A REVERSIBLE TEMPORARY PROTECTIVE VARNISH |
| DE3336417A1 (en) * | 1983-10-06 | 1985-04-18 | Kufner Textilwerke GmbH, 8000 München | HOT SEAL ADHESIVE FOR COATING SURFACES, ESPECIALLY INSERTS, AND METHOD FOR THE PRODUCTION THEREOF |
| DK165628C (en) * | 1984-03-09 | 1993-05-24 | Fuji Kagaku Shikogyo | RURAL TAPE FOR MULTIPLE USE |
| US4605593A (en) * | 1984-09-04 | 1986-08-12 | Canon Kabushiki Kaisha | Pressure sensitive transferring member |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4093772A (en) * | 1977-01-31 | 1978-06-06 | Burroughs Corporation | Pressure-activated and non-tacky lift-off element and process therefor |
| NL7807984A (en) * | 1977-08-01 | 1979-02-05 | Johnson & Johnson | NORMAL NON STICKY ADHESIVE TAPE AND PROCEDURE FOR ITS APPLICATION. |
-
1981
- 1981-06-09 CA CA000379362A patent/CA1170118A/en not_active Expired
- 1981-07-06 FR FR8113276A patent/FR2486453A1/en active Pending
- 1981-07-07 DE DE19813126793 patent/DE3126793A1/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| DE3126793A1 (en) | 1982-04-22 |
| FR2486453A1 (en) | 1982-01-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |