CA1169717A - Method for making printable autoadhesive tapes and the autoadhesive tapes obtained thereby - Google Patents
Method for making printable autoadhesive tapes and the autoadhesive tapes obtained therebyInfo
- Publication number
- CA1169717A CA1169717A CA000394801A CA394801A CA1169717A CA 1169717 A CA1169717 A CA 1169717A CA 000394801 A CA000394801 A CA 000394801A CA 394801 A CA394801 A CA 394801A CA 1169717 A CA1169717 A CA 1169717A
- Authority
- CA
- Canada
- Prior art keywords
- antiadhesive
- tape
- layer
- film
- resins
- 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
Landscapes
- Adhesives Or Adhesive Processes (AREA)
- Adhesive Tapes (AREA)
Abstract
A method for making self-adhesive printable tapes, having a supporting member made of polypropylene, is described wherein the antiadhesive surface of the supporting film, provided for receiving the printing, is coated by a lacquer including resins having a good adhesion to the supporting film, good antiadhesive properties and a very good receptivity for printing inks. Examples of such resins are: copolymers of acrylic or methacrylic esters with alcohols, polyurethane resins, lacquer, including modified cellulose ethers and esters, polyamide copolymers and cellulose ester modified polyamide copolymers.
Description
The present invention relates to a method for ~mak~ng printahle sel-adhesive tapes, ha~ing a supporting film made of polypropylene.
It is known -that a film of polypropylene is not receptive to printing inks and cannot be printed.
It is also known that, in order to m~ke printing possible, it is necessary to process the surface of the film with electric charges, or by flame processing, in such a way as to modify the surface of the film, so as to provide the chemical-physical conditions suitable for receiving and holding inks.
This process is carried out to increase surface tension of the film up to 40 dynes/cm (on the surface of the unprocessed film it is 30 dynes/cm), to provide a more wettable film with respect to the printing inks.
By means of the aforesaid processing, the contact angle is increased between the film (which is solid) and the inks (which are liquid), so as to facilitate the adhesion of the inks, ~ccording to the first adhesion law. The measure-ment of the surface tension is carried out with conventionalsurface tension liquids, according to the methods of TAPPI
and ASTM.
Printing inks are known in the trade which are suitable for printing processed polypropylene. Such printing inks are conventionally used for printing materials for pack-aging applications and the like.
In the case of self-adhesive tapes having a polypropylene supporting film, as provided for printing applications, it is necessary to process the film on a surface, in such a way as to allow film to receive the a~hesive layerj either ~ith or without an i~termediate anchoring layer, and on the other s~rface thereof, to receive the printing.
.. ' ~
However, this two-step processing may cause the so-called blocking phenomena to occur, due ko the strong adhesion of the self-adhesi~e layer on the back, with conse-quent breakage during the unwinding of the rolls.
In order to eliminate the above mentioned disadvan-tage, the application on the adhesive free surface of an anti-adhesive layer, the so-called "release coat" may be considered.
This antiadhesive layer, however, has the disadvantage of re-pelling the printing inks.
In some cases it is possible to solve this problem by applying a lacqueron the back of the tape or by making said tape of, a mono- or bi--lacquered supporting fï~m.
These lacquered supporting films are commercially available and mainly used, to make the tape material thermo-sealable, in addition to being printahle. However, apart from the cost, the application of theselacquer6 which are general-ly based on acrylic and vinyl copolymers, in maklng self-adhesive tapes printable, require the use of a primer. Thus, the applicatio~ of the lacquer has to ~e carrie~ out in two steps.
This two step method, however, is different from the presently used method for making self-adhesive tapes having a polyethylene supporting film, in which all of the opera-tions are carried out by a single stepO
It is well known that, the presently used method for making self~adhesive tapes having a processed polypropylene supporting film consists of applying, on a face of the film, an anchoring layer and an adhesive layer and, on th~ other face of the film, and antiadhesive layer. More specifically, the anchoring layer, whIch, in some cases may be omitted, is ~enerall~ a solution o~ dispers~on of elastomeric and/or plas-tics materials. The adhesive layer, however is a solution of elastomeric materials, modified ~y tackifying resins, in
It is known -that a film of polypropylene is not receptive to printing inks and cannot be printed.
It is also known that, in order to m~ke printing possible, it is necessary to process the surface of the film with electric charges, or by flame processing, in such a way as to modify the surface of the film, so as to provide the chemical-physical conditions suitable for receiving and holding inks.
This process is carried out to increase surface tension of the film up to 40 dynes/cm (on the surface of the unprocessed film it is 30 dynes/cm), to provide a more wettable film with respect to the printing inks.
By means of the aforesaid processing, the contact angle is increased between the film (which is solid) and the inks (which are liquid), so as to facilitate the adhesion of the inks, ~ccording to the first adhesion law. The measure-ment of the surface tension is carried out with conventionalsurface tension liquids, according to the methods of TAPPI
and ASTM.
Printing inks are known in the trade which are suitable for printing processed polypropylene. Such printing inks are conventionally used for printing materials for pack-aging applications and the like.
In the case of self-adhesive tapes having a polypropylene supporting film, as provided for printing applications, it is necessary to process the film on a surface, in such a way as to allow film to receive the a~hesive layerj either ~ith or without an i~termediate anchoring layer, and on the other s~rface thereof, to receive the printing.
.. ' ~
However, this two-step processing may cause the so-called blocking phenomena to occur, due ko the strong adhesion of the self-adhesi~e layer on the back, with conse-quent breakage during the unwinding of the rolls.
In order to eliminate the above mentioned disadvan-tage, the application on the adhesive free surface of an anti-adhesive layer, the so-called "release coat" may be considered.
This antiadhesive layer, however, has the disadvantage of re-pelling the printing inks.
In some cases it is possible to solve this problem by applying a lacqueron the back of the tape or by making said tape of, a mono- or bi--lacquered supporting fï~m.
These lacquered supporting films are commercially available and mainly used, to make the tape material thermo-sealable, in addition to being printahle. However, apart from the cost, the application of theselacquer6 which are general-ly based on acrylic and vinyl copolymers, in maklng self-adhesive tapes printable, require the use of a primer. Thus, the applicatio~ of the lacquer has to ~e carrie~ out in two steps.
This two step method, however, is different from the presently used method for making self-adhesive tapes having a polyethylene supporting film, in which all of the opera-tions are carried out by a single stepO
It is well known that, the presently used method for making self~adhesive tapes having a processed polypropylene supporting film consists of applying, on a face of the film, an anchoring layer and an adhesive layer and, on th~ other face of the film, and antiadhesive layer. More specifically, the anchoring layer, whIch, in some cases may be omitted, is ~enerall~ a solution o~ dispers~on of elastomeric and/or plas-tics materials. The adhesive layer, however is a solution of elastomeric materials, modified ~y tackifying resins, in
- 2 -7~7 organiC solyents, or of aqueous dispersions of elastomeric and/or plastics mater~als ~l~ernatiYely, said layer may be adhesive materials based on block elastomeric copolymers, or plastics materials (e g. acrylic, and polyesters,), or of solvent free adhesives, based on acrylic prepolymers, poly-urethane prepolymers, and the like which may be cross-linked by chemical methods or by radiation, such as U.V and E.B
radiation.
The materials used to provide the antiadhesive layer are vinyl esters, long chain ~ligher alcohols, preferably including from 14 to 22 carbon atoms, or polyvinyl carbamates, also of the long chain type.
These compounds, however, as discussed above, repel printing inks, so that the self-adhesive tapes obtained can not be printed.
Accordingly, the present invention provides a self-adhesive printed tape which is a film of polypropylene, an ~- adhesive layer applied to one surface of said film and an antiadhesive lacquer applied on the other surface of said film, said antiadhesive layer being in the amount of 0.5-1.5 g/m of said tape and being one member selected from the group consisting of acrylic and methacrylic resins, poly-urethane resins, polyamide copolymers, and modified cellulose ethers and esters, and being printed on.
The present invention also provides a method of manu-facturing a printable self-adhesive tape which comprises:
processing a film of polypropylene to increase the surface tension thereo~ to a value of 4Q dynes/cm; applying to a sur-face of the processed fil~ an adhesive layer; applying to the oppos~te surface, an antiadhesive lac~uer receptive to print-~ng inks, $aid antiadhes~ye lac~uer being a solution of a member selected from the group consisting of acrylic resins, ~,~
~ - 3 -;{~
methacrylic resins, polyurethane. resins obtained by conden-sation o~ polyenes and ~socyanatesi, pol~amide copol~mers, and mod~ie.d cellulose ethe~s and esters in an oryanic solvent and eYaporatin~ the solvent to ~o~m an antiadhesive layer.
Thus according to the present invention, applying on the surface of the processed supporting polypropylene film, opposite to the surface provided with the adhesive layer, a layer of a lacquer ~ased on resins having a good adhesion to the -~ - 3a -~L~g;.~3~7~7 pr~cessed polypropylene film and good antiadhesive or releasing properties, in such a way as not to deleteriously affect the tapes unwindin~ characteristics, very good receptivity for printing inks is achieved.
There are several resins having the above mentioned properties and which, accordingly, may be used for forming the self-adhesive layer on the self-adhesive printable tapes.
These resins include acrylic or methacrylic ester copolymers obtained from acrylic and/or methacrylic acid and alcohols, polyurethane resins obtained by a condensation of polyenes and isocyana~es, lacquers based on modified cellulose ethers and esters, polyamide copolymers and cellulose ester modified polyamide copolymers.
Such resins thus include 1) arylic or methacrylie resins, obtained by polymerizing or copolymerizing the following eompounds: methyl methacrylate, ethyl methacrylate, butyl methacrylate methyl acrylate, ethyl acrylate butyl acrylates whieh are commercially available under the trademarks "ELVACITE"
(Du Pont de Nemours), "PARALOID" and "ACRYLOID" (Roehm & Haas), and "DEGAN LP" ~Degussa Geschaftsbereich Chemie), whieh may be modified by alkyd, cellulos~, epoxy and, phenoxy resins.
These modified resins are dissolved in organic solvents, such as methylethylketone, ethyl acetate, toluene, and butyl aleohol with a solids content of about 20%. 2) Polyurethane resins, obtained by condensation or polyenes and isocyanates, commerically available under the trademarks "LIOFOL UK" (Henkel), and "PENTACOLL" (Wikolin Polymer~. 3) Polyamide copolymers, commercially available under the trademarks "VERS~ID" (Shering) and "REAMM~DE" (Chem Plast), modified by plastifiers such as sulphonamides and cellulose resins, such as nitro-cellulose.
Typical formulations of the lacquers used, are pre-paring the antiadhesive printable layer are the following:
~3 . .~
7~L~
FORMULATION A
- Paraloid ~ a trademar]c of Roehm ~ Haas, 80 ppm's Philadelphia) - Vinylite VMCH, a chloroacetovinyl copolymer (U.C.C.C., New York) 20 "
- Epoxy resin 828 (a trademarki of Shell Chimica, 5 Milan) - Metnylethylketone 200 "
: - Ethyl acetate 200 - Toluene 150 "
- Isopropyl alcohol 50 - TS=15%
FORMULATION B
.
- Pentacol PR 19.24 (a trademark of Wikolin 100 ppm's Polymer Chemi.e, Bremen) - Hardener MK 40/32 (a trademark of Wikolin Polymer Chemie, Bremen) 6 "
- Diluent, a mixture of methylethylketone and toluene 70 "
TS= 15~
FORMULATION C
- Versamid 961 (a trademark of Shering, Milan) 100 ppm's - - Nitrocellulose l/2 sec (Hercules, Milan) 10 "
- Isopropyl alcohol 300 - Ethyl acetate 300 TS= 15.5%
For preparing self-adhesive tapes provided with a printable polypropylene supporting film, the expanded mono-or bi-oriented film, processed on a portion of the film in such a way as to present a surface tension of about 40 dynes/
cm, is passed to a three headed coating machine, for applying the so-called "release coat" (thereinafter called RC), an anchoring layer and a self-adhesive layer, according to con-ventional methods.
The film side prayided for receiving the RC, in particulax, is processed by means of the corona effect, in such a way as to present a surface tension between 36 and 40 dynes/cm.
According to the method of the invention, instead of the RC there is applied a layer of a lacquer having one of the shown hereinabove formulations A, B or C, by the Gravure or Mayer Bar system or any other suitable systems.
The dry end lacquer on the film is present in an amount of 0.5 to 1.5 g/m Then thelacquer layer is dried in an oven, in such a way as to cause the solvents to evaporate.
On the film opposite side or surface there is applied the anchoring layer, if necessary, and the adhesive layer, of conventional composition and by conventional methods.
Upon drying the primer and adhesive layer, the adhesive film is wound in rolls to be converted into tapes having the desired width and length.
For the thus obtained lacquered tapes there are determined the tacXifying characteristics on steel and on sup-porting members, the unwinding force, the so-called "tack" and lacquer transfer, according to AFERA and PSTC.
With the above formulations A, B and C, were obtained the following values:
SAMPLES A B C
- Adhesion on steel, in g/cm220 236 200 - Adhesion on supports, in g/cm 160 200 155 - Unwinding force, in g/cm 290 320 220 ` - Rolling ball, in tack cm 2 2 1.5 - Lacquer txansfer (upon accelexated ageing at QC for 72 hl slight none none The thus obtained lacquered rolls are printed using suitable conventional printing inks.
There a~e generally used printin~ inks based on polyamide resins, com,~ercially available, to adhere to the lacquered surface.
The printing machine can be of the flexographic, Roto gravure or screening type, suitably modified in order to assure a complete and perfect drying of the ink and to permit the application, either simultaneous or successive, of an addition-al antiadhesive layer.
The antiadhesive layer is such as to permit an easy unwinding of the tape and prevent backprinting, without dele-teriously affecting the adhesive characteristics due to migra-tion and/or transfer phenomena.
The application of the above mentioned antiadhesive layer is carried out using solutions in organic solvents of adhesive compounds, by means of the Mayer Bar, Rotogravure, Kiss-Roll systems, or combinations thereof.
The most suitable antiadhesive compounds are long chain fat alcohol vinyl esters, containing from 16 to 24 carbon atoms; polyvinyl carbamates; or hemiesters or hemiamides of long chain aliphatic compounds, having from 16 to 30 carbon atoms, effective to provide a good anchoring to the lacquered and inked surface.
The antiadhesive compounds are either dissolved or dispersed in volatile organic solvents, such as aromatic and aliphatic hydrocarbons, esters, ketones, and alcohols or in aqueous dispersions with a solids content from 0.2 to 5~, the dispersing phase being completely removed by evaporation.
Upon evaporating the solvents or dispersing phase, the antiadhesi~e layer remaining on the lacquered and inked surface'facil~t~tes the unwi,ndi,ng of the tape, without causing backprintin~ a,nd without altering the characteristics of the 7~7 applied adhesiYe.
The sequence of the carried out printing operations carried out on the self-adhesive tape provided with the lacquered supporting film was the following:
- unwinding of the tape - flexographic printing in one or rnore colours with suitable ink~
- drying of the inks - application of an antiadhesive layer - drying - cooling of the tape - winding of the finished,printed tape.
The characteristics of the printed tapes, obtained by using the above formulations A, B and C are as follows:
SAMPLES A B C
- Adhesion on steel, in g/cm 225 250 200 - Adhesion on supports in g/cm160 180 155 - Unwinding force, in g/cm 260 280 210 - Rolling ball, in tack cm 2.5 3 2 - Initial backprinting slight slight none - Backprinting upon accelerated " " slight ageing at 60C, 72 h.
The measurements have been carried out according to the AFERA and PSTC Standards.
For "backprinting" it is meant the removing of the printing or the lacquer by the adhesive.
From the above description and the examination of the aforesaid characteristics of the printed tapes, the advantages and technical progress characterizing the method for making and printing self-adhesive tapes provided with a polypropylene support~n~ film accordi,ng to the present invention are evident.
; ~ ~ 8 -I~L
radiation.
The materials used to provide the antiadhesive layer are vinyl esters, long chain ~ligher alcohols, preferably including from 14 to 22 carbon atoms, or polyvinyl carbamates, also of the long chain type.
These compounds, however, as discussed above, repel printing inks, so that the self-adhesive tapes obtained can not be printed.
Accordingly, the present invention provides a self-adhesive printed tape which is a film of polypropylene, an ~- adhesive layer applied to one surface of said film and an antiadhesive lacquer applied on the other surface of said film, said antiadhesive layer being in the amount of 0.5-1.5 g/m of said tape and being one member selected from the group consisting of acrylic and methacrylic resins, poly-urethane resins, polyamide copolymers, and modified cellulose ethers and esters, and being printed on.
The present invention also provides a method of manu-facturing a printable self-adhesive tape which comprises:
processing a film of polypropylene to increase the surface tension thereo~ to a value of 4Q dynes/cm; applying to a sur-face of the processed fil~ an adhesive layer; applying to the oppos~te surface, an antiadhesive lac~uer receptive to print-~ng inks, $aid antiadhes~ye lac~uer being a solution of a member selected from the group consisting of acrylic resins, ~,~
~ - 3 -;{~
methacrylic resins, polyurethane. resins obtained by conden-sation o~ polyenes and ~socyanatesi, pol~amide copol~mers, and mod~ie.d cellulose ethe~s and esters in an oryanic solvent and eYaporatin~ the solvent to ~o~m an antiadhesive layer.
Thus according to the present invention, applying on the surface of the processed supporting polypropylene film, opposite to the surface provided with the adhesive layer, a layer of a lacquer ~ased on resins having a good adhesion to the -~ - 3a -~L~g;.~3~7~7 pr~cessed polypropylene film and good antiadhesive or releasing properties, in such a way as not to deleteriously affect the tapes unwindin~ characteristics, very good receptivity for printing inks is achieved.
There are several resins having the above mentioned properties and which, accordingly, may be used for forming the self-adhesive layer on the self-adhesive printable tapes.
These resins include acrylic or methacrylic ester copolymers obtained from acrylic and/or methacrylic acid and alcohols, polyurethane resins obtained by a condensation of polyenes and isocyana~es, lacquers based on modified cellulose ethers and esters, polyamide copolymers and cellulose ester modified polyamide copolymers.
Such resins thus include 1) arylic or methacrylie resins, obtained by polymerizing or copolymerizing the following eompounds: methyl methacrylate, ethyl methacrylate, butyl methacrylate methyl acrylate, ethyl acrylate butyl acrylates whieh are commercially available under the trademarks "ELVACITE"
(Du Pont de Nemours), "PARALOID" and "ACRYLOID" (Roehm & Haas), and "DEGAN LP" ~Degussa Geschaftsbereich Chemie), whieh may be modified by alkyd, cellulos~, epoxy and, phenoxy resins.
These modified resins are dissolved in organic solvents, such as methylethylketone, ethyl acetate, toluene, and butyl aleohol with a solids content of about 20%. 2) Polyurethane resins, obtained by condensation or polyenes and isocyanates, commerically available under the trademarks "LIOFOL UK" (Henkel), and "PENTACOLL" (Wikolin Polymer~. 3) Polyamide copolymers, commercially available under the trademarks "VERS~ID" (Shering) and "REAMM~DE" (Chem Plast), modified by plastifiers such as sulphonamides and cellulose resins, such as nitro-cellulose.
Typical formulations of the lacquers used, are pre-paring the antiadhesive printable layer are the following:
~3 . .~
7~L~
FORMULATION A
- Paraloid ~ a trademar]c of Roehm ~ Haas, 80 ppm's Philadelphia) - Vinylite VMCH, a chloroacetovinyl copolymer (U.C.C.C., New York) 20 "
- Epoxy resin 828 (a trademarki of Shell Chimica, 5 Milan) - Metnylethylketone 200 "
: - Ethyl acetate 200 - Toluene 150 "
- Isopropyl alcohol 50 - TS=15%
FORMULATION B
.
- Pentacol PR 19.24 (a trademark of Wikolin 100 ppm's Polymer Chemi.e, Bremen) - Hardener MK 40/32 (a trademark of Wikolin Polymer Chemie, Bremen) 6 "
- Diluent, a mixture of methylethylketone and toluene 70 "
TS= 15~
FORMULATION C
- Versamid 961 (a trademark of Shering, Milan) 100 ppm's - - Nitrocellulose l/2 sec (Hercules, Milan) 10 "
- Isopropyl alcohol 300 - Ethyl acetate 300 TS= 15.5%
For preparing self-adhesive tapes provided with a printable polypropylene supporting film, the expanded mono-or bi-oriented film, processed on a portion of the film in such a way as to present a surface tension of about 40 dynes/
cm, is passed to a three headed coating machine, for applying the so-called "release coat" (thereinafter called RC), an anchoring layer and a self-adhesive layer, according to con-ventional methods.
The film side prayided for receiving the RC, in particulax, is processed by means of the corona effect, in such a way as to present a surface tension between 36 and 40 dynes/cm.
According to the method of the invention, instead of the RC there is applied a layer of a lacquer having one of the shown hereinabove formulations A, B or C, by the Gravure or Mayer Bar system or any other suitable systems.
The dry end lacquer on the film is present in an amount of 0.5 to 1.5 g/m Then thelacquer layer is dried in an oven, in such a way as to cause the solvents to evaporate.
On the film opposite side or surface there is applied the anchoring layer, if necessary, and the adhesive layer, of conventional composition and by conventional methods.
Upon drying the primer and adhesive layer, the adhesive film is wound in rolls to be converted into tapes having the desired width and length.
For the thus obtained lacquered tapes there are determined the tacXifying characteristics on steel and on sup-porting members, the unwinding force, the so-called "tack" and lacquer transfer, according to AFERA and PSTC.
With the above formulations A, B and C, were obtained the following values:
SAMPLES A B C
- Adhesion on steel, in g/cm220 236 200 - Adhesion on supports, in g/cm 160 200 155 - Unwinding force, in g/cm 290 320 220 ` - Rolling ball, in tack cm 2 2 1.5 - Lacquer txansfer (upon accelexated ageing at QC for 72 hl slight none none The thus obtained lacquered rolls are printed using suitable conventional printing inks.
There a~e generally used printin~ inks based on polyamide resins, com,~ercially available, to adhere to the lacquered surface.
The printing machine can be of the flexographic, Roto gravure or screening type, suitably modified in order to assure a complete and perfect drying of the ink and to permit the application, either simultaneous or successive, of an addition-al antiadhesive layer.
The antiadhesive layer is such as to permit an easy unwinding of the tape and prevent backprinting, without dele-teriously affecting the adhesive characteristics due to migra-tion and/or transfer phenomena.
The application of the above mentioned antiadhesive layer is carried out using solutions in organic solvents of adhesive compounds, by means of the Mayer Bar, Rotogravure, Kiss-Roll systems, or combinations thereof.
The most suitable antiadhesive compounds are long chain fat alcohol vinyl esters, containing from 16 to 24 carbon atoms; polyvinyl carbamates; or hemiesters or hemiamides of long chain aliphatic compounds, having from 16 to 30 carbon atoms, effective to provide a good anchoring to the lacquered and inked surface.
The antiadhesive compounds are either dissolved or dispersed in volatile organic solvents, such as aromatic and aliphatic hydrocarbons, esters, ketones, and alcohols or in aqueous dispersions with a solids content from 0.2 to 5~, the dispersing phase being completely removed by evaporation.
Upon evaporating the solvents or dispersing phase, the antiadhesi~e layer remaining on the lacquered and inked surface'facil~t~tes the unwi,ndi,ng of the tape, without causing backprintin~ a,nd without altering the characteristics of the 7~7 applied adhesiYe.
The sequence of the carried out printing operations carried out on the self-adhesive tape provided with the lacquered supporting film was the following:
- unwinding of the tape - flexographic printing in one or rnore colours with suitable ink~
- drying of the inks - application of an antiadhesive layer - drying - cooling of the tape - winding of the finished,printed tape.
The characteristics of the printed tapes, obtained by using the above formulations A, B and C are as follows:
SAMPLES A B C
- Adhesion on steel, in g/cm 225 250 200 - Adhesion on supports in g/cm160 180 155 - Unwinding force, in g/cm 260 280 210 - Rolling ball, in tack cm 2.5 3 2 - Initial backprinting slight slight none - Backprinting upon accelerated " " slight ageing at 60C, 72 h.
The measurements have been carried out according to the AFERA and PSTC Standards.
For "backprinting" it is meant the removing of the printing or the lacquer by the adhesive.
From the above description and the examination of the aforesaid characteristics of the printed tapes, the advantages and technical progress characterizing the method for making and printing self-adhesive tapes provided with a polypropylene support~n~ film accordi,ng to the present invention are evident.
; ~ ~ 8 -I~L
Claims (14)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A self-adhesive printed tape which is a film of polypropylene, an adhesive layer applied to one surface of said film and an antiadhesive lacquer applied on the other surface of said film, said antiadhesive layer being in the amount of 0.5 to 1.5 g/m2 of said tape and being one member selected from the group consisting of acrylic and methacrylic resins, poly-urethane resins, polyamide copolymers, and modified cellulose ethers and esters, and being printed on.
2. A tape as claimed in claim 1, in which the anti-adhesive layer is a member selected from acrylic and methacrylic resins.
3. A tape as claimed in claim 1, in which the antiadhesive layer is a member selected from polymers or copolymer or esters of acrylic and methacrylic with alcohols.
4. A tape as claimed in claim 1, in which the anti-adhesive layer is a polyurethane layer.
5. A tape as claimed in claim 1, in which the antiadhesive layer is polyurethene resin obtained by con-densation of polyenes and isocyanates.
6. A tape as claimed in claim 1, in which the anti-adhesive layer is a modified cellulose ether or ester resin.
7. A tape as claimed in claim 1, in which the antiadhesive layer is a polyamide copolymer.
8. The tape as claimed in claim 1, in which the antiadhesive layer is a cellulose ester modified polyamide copolymer.
9. A method of manufacturing a printable self-antiadhesive tape which comprises processing a film of polypropylene to increase the surface tension thereof to a value of 40 dynes/
cm; applying to a surface of the processed film an adhesive layer; applying to the opposite surface, an antiadhesive lacquer receptive to printing inks, said antiadhesive lacquers being a solution of a member selected from the group consisting of acrylic resins, methacrylic resins, polyurethane resins obtained by condensation of polyenes and isocyanates, polyamide copoly-mers, and modified cellulose ethers and esters in an organic solvent and evaporating the solvent to form an antiadhesive layer.
cm; applying to a surface of the processed film an adhesive layer; applying to the opposite surface, an antiadhesive lacquer receptive to printing inks, said antiadhesive lacquers being a solution of a member selected from the group consisting of acrylic resins, methacrylic resins, polyurethane resins obtained by condensation of polyenes and isocyanates, polyamide copoly-mers, and modified cellulose ethers and esters in an organic solvent and evaporating the solvent to form an antiadhesive layer.
10. The method according to claim 9, wherein said lacquer is applied in an amount between 0.5 and 1.5 g/m2 of said tape.
11. The method according to claim 9, wherein said organic solvent is methylethylketone, ethyl acetate, toluene, isopropyl alcohol or butyl alcohol.
12. The method according to claim 9, wherein said antiadhesive layer consists of 5 parts of epoxy resin, 20 parts of a chloroacetovinyl copolymer and 80 parts of an acrylic resin.
13. The method according to claim 9, wherein said antiadhesive layer consists of 100 parts of a polyurethane resin.
14. The method according to claim 9, wherein said antiadhesive layer consists of 100 parts of a polyamide copolymer modified by nitrocellulose.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000394801A CA1169717A (en) | 1982-01-25 | 1982-01-25 | Method for making printable autoadhesive tapes and the autoadhesive tapes obtained thereby |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000394801A CA1169717A (en) | 1982-01-25 | 1982-01-25 | Method for making printable autoadhesive tapes and the autoadhesive tapes obtained thereby |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1169717A true CA1169717A (en) | 1984-06-26 |
Family
ID=4121896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000394801A Expired CA1169717A (en) | 1982-01-25 | 1982-01-25 | Method for making printable autoadhesive tapes and the autoadhesive tapes obtained thereby |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1169717A (en) |
-
1982
- 1982-01-25 CA CA000394801A patent/CA1169717A/en not_active Expired
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4421817A (en) | Method for making printable self-adhesive tapes and the self-adhesive tapes obtaned thereby | |
| CA2245219C (en) | Film appropriate for printing | |
| US4725454A (en) | Process for the manufacturing of adhesive tapes | |
| US4599260A (en) | Directly printable tape with novel release coating | |
| JP3996800B2 (en) | Surface protective film and laminate using the same | |
| US4126594A (en) | Method of protecting plastic films against abrasion and lacquer for performing the method | |
| US4587156A (en) | Directly printable pressure-sensitive adhesive tape | |
| JPS5928196B2 (en) | transfer material | |
| US4070523A (en) | Printable pressure-sensitive adhesive tapes | |
| US4857372A (en) | Graphic composite with thermally detackifiable adhesive premask tape | |
| JP2004223974A (en) | Optical protecting tape | |
| JPS6037800B2 (en) | dry transfer system | |
| CA1169717A (en) | Method for making printable autoadhesive tapes and the autoadhesive tapes obtained thereby | |
| US4617199A (en) | Process for the manufacturing of adhesive tapes | |
| US4825763A (en) | Method of printing the backside of adhesive tape | |
| GB2328645A (en) | Decalcamania having solvent-activated adhesive layers | |
| JPS6050392B2 (en) | Peelable film forming agent | |
| DE2704328C2 (en) | ||
| JPS641114Y2 (en) | ||
| JPH0776673A (en) | Tacky tape | |
| JPS5833909B2 (en) | pressure sensitive adhesive composition | |
| JPH06328626A (en) | Release film | |
| JPH0284476A (en) | Pressure sensitive adhesive sheet for cutting machines | |
| JP2000178514A (en) | Adhesive sheet | |
| JPH03248882A (en) | Transfer sheet |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |