GB2153100A - Photosensitive materials for making signs and labels - Google Patents
Photosensitive materials for making signs and labels Download PDFInfo
- Publication number
- GB2153100A GB2153100A GB08401112A GB8401112A GB2153100A GB 2153100 A GB2153100 A GB 2153100A GB 08401112 A GB08401112 A GB 08401112A GB 8401112 A GB8401112 A GB 8401112A GB 2153100 A GB2153100 A GB 2153100A
- Authority
- GB
- United Kingdom
- Prior art keywords
- layer
- image
- pressure sensitive
- sensitive adhesive
- transparent
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/26—Processing photosensitive materials; Apparatus therefor
- G03F7/34—Imagewise removal by selective transfer, e.g. peeling away
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Laminated Bodies (AREA)
Abstract
Sign making materials are described consisting of two sheets which can be peeled apart and which are separated by at least two intermediate layers. One of the intermediate layers is a transparent or translucent layer of permanently tacky pressure sensitive adhesive. The other is an adhesive image- forming layer. The adhesive image-forming layer may be made up of several sublayers. After imagewise exposure of such material, the two outer sheets are peeled apart and the image-forming layer shears imagewise so that the peeled apart transparent or translucent sheet bears a pressure sensitive layer overall having thereon in image areas indicia formed of non-transparent or-translucent material from the image-forming layer and which has an outer adhesive surface.
Description
SPECIFICATION
Photosensitive materials for making signs and labels
This invention relates to photosensitive materials for making signs and labels.
Patent Specification 2053497 describes and claims sign making materials which consist of a pair of sheets which can be peeled apart, at least one of the sheets being transparent or translucent, wherein the sheets are held together by at least one transparent or translucent layer of permanently tacky pressure sensitive adhesive adjacent the or a transparent or translucent sheet and an image-forming layer. The image-forming layer may either by a photosensitive nontransparent or translucent layer or it may be comprised of two layers, a first photosensitive but otherwise non-light absorptive layer adjacent the layer of permanently tacky pressure sensitive adhesive and a second layer which is non-photosensitive, and non-transparent or translucent.
After image-wise exposure to actinic radiation and peeling apart of the sheets, the imageforming layer shears along the edges of the image areas so that the peeled apart transparent or translucent sheet bears a pressure sensitive adhesive layer which in turn bears, in the image areas, indicia formed of non-transparent or translucent material from the image-forming layer.
Such photosensitive materials are negative working and act effectively to produce adherent labels when exposed and peeled apart. The effectiveness of the label is, however, substantially diminished if the image area constitutes a substantial proportion of the overall area. Thus for labelling tapes imaged with a succession of letters, the product works well with small letters but not so well with large letters, e.g. in heavy typeface which occupies a substantial area of the tape.
According to the present invention there is provided a sign making material which consists of the following components:
1. a first transparent or translucent sheet;
2. a transparent or translucent layer of permanently tacky pressure sensitive adhesive;
3. an adhesive image-forming layer, which image-forming layer comprises
i) a layer which is both photosensitive and non-transparent or translucent, or
ii) a first layer which is photosensitive but otherwise non-light absorptive adjacent the layer of permanently tacky pressure sensitive adhesive and, adjacent this first layer, a second nonphotosensitive layer which second layer is non-transparent or translucent,
wherein the image-forming layer also comprises a permanently tacky pressure sensitive adhesive component, either as a separate layer on top of layer (i) or the second layer of (ii), or incorporated into layer (i) or the second layer of (ii), and
4. a second sheet adherent to the image-forming layer,
wherein after image-wise exposure to actinic radiation and peeling apart of the sheets the image-forming layer shears along the edges of the image areas so that the peeled apart transparent or translucent sheet bears the pressure sensitive adhesive layer overall having thereon in image areas indicia formed of non-transparent or translucent material from the imageforming layer and' having an outer adhesive surface.
By working in this way, the whole of the outer surface of the imaged and peeled apart transparent or translucent sheet is adhesive and can accordingly be adhered where desired.
Labels produced in this way adhere well irrespective of the proportion of their surface area occupied by the images.
It can be seen that the sign making material according to the present invention may take one of four forms depending upon whether the permanently tacky pressure sensitive adhesive is separate from the image forming layer or is incorporated into the image forming layer and depending on whether the image forming layer itself consists of a single layer as in 3(i) or a dual layer as in 3(ii). Of these, the least preferred is the case where the pressure sensitive adhesive component is present as a separate layer on top of a unitary photosensitive non-transparent or translucent layer. In such types, the photographic response time may be substantial due to the presence of e.g. light-absorbent material throughout the photosensitive layer.
It is particularly advantageous to incorporate a further layer of pressure sensitive adhesive between the adhesive image forming layer item 3 and the second sheet item 4. This further layer of pressure sensitive adhesive is preferably applied to the second sheet and has the effect of a subbing layer enabling the adhesion of the adhesive image forming layer 3 to the second sheet to be defined or controlled. Variations in the properties of the second sheet in raw material terms may be compensated for by the use of an appropriate coating of pressure sensitive adhesive on that sheet.It is particularly advantageous to incorporate in any such additional layer of pressure sensitive adhesive a pigment since this acts to modify the adhesiveness of the pressure sensitive adhesive, simple variation of pigment content enabling variation in the adhesive properties of the extra layer to be easily achieved.
Preferably the image-forming layer comprises a first layer which is photosensitive but otherwise non-light absorptive adjacent the layer of pressure sensitive adhesive and a second layer adjacent the first layer which is non photosensitive, non-transparent or translucent, and which incorporates a pressure sensitive adhesive component.
Preferably the individual components of the various layers are so chosen that imagewise shearing takes place throughout the entire depth of the image-forming layer. However, this is not absolutely necessary insofar as it is possible for the image-forming layer to shear around the edges of the images and also to fail cohesively across the areas of those images.
The selection of suitable materials for the transparent or tanslucent sheet, the second sheet, the permanently tacky pressure sensitive adhesive and the components of the image-forming layer may be made in accordance with known principles and specifically may be as suggested in
Specification 2053497 the whole of the disclosures of which are incorporated herein by such reference.
For a clearer understanding of the various types of material encompassed within the scope of the present invention and the modifications which may be made thereto, reference may be had to the accompanying drawings. Each of these drawings is a diagrammatic representation of a section of sign making material in accordance~with the present invention both prior to exposure and following exposure and peeling apart, the exposure taking the form of irradiation by actinic light to a central portion of the section illustrated.
As is well known, the mechanism of failure in peel apart materials as described in the specification referred to above and also in the case of the materials according to the present invention, is cohesive or adhesive. The separation naturally occurs at the weakest link in the chain of materials across the laminate, and the weakest link may either be the adhesion between two adjacent layers or may be the internal cohesive strength of a layer. Both failure mechanisms are possible in the materials according to the present invention and each of the diagrammatic
Figures shows the mode of operation of such materials which are adjusted to fail adhesively or cohesively. Determination of which link in the chain is the weakest can be effected without difficulty by appropriate formulation of the materials used to make the various layers.
It is believed that the diagrams are largely self explanatory. In the accompanying seven
Figures, Figs. 1, 3, 5 and 7 show the four main types of product in accordance with the invention. Figs. 2, 4 and 6 show product types corresponding to Figs. 1, 3 and 5 respectively but with the addition of an extra layer of pressure sensitive adhesive applied on the second sheet.
The manufacture of the multilayer materials in accordance with the present invention may take place in any convenient fashion. Generally speaking, it it preferred to coat the transparent or translucent sheet and the second sheet with respective layers of pressure sensitive adhesive, to coat one of them with a photosensitive layer and then to laminate the two so-coated sheets together.
The following examples will serve to illustrate the invention.
EXAMPLE 1
This is an example of a material constructed in accordance with Fig. 4 of the accompanying drawings and which operates by adhesive failure as illustrated at 4(a).
A pigmented adhesive was made by ball milling for 48 hours a mixture of the following ingredients in the following proportions by weight:
Silicon adhesive (DC 282 ex Dow
Corning Ltd.) 10 parts
Xylene 90 parts
Carbon black (Elftex 150 ex Cabot
Carbon Limited) 2.5 parts
The adhesive composition was then coated using a No. 20 Meyer bar on to release paper (Quicklease 30/102 ex Jointine Limited) and the coated sheets were dried in an oven at 50 C.
for 5 minutes.
An image-forming layer was made by coating the pigmented adhesive layer using a No. 20
Meyer bar and drying the coating at 50 C. for 10 minutes using a coating composition consisting of the following ingredients in the following proportions by weight:
Polyvinyl alcohol (10% by weight
solution in water, Gelvatol 40-10
ex Monsanto) 90 parts
Carbon black (Elftex 150) 30 parts
Hydroxyethyl cellulose solution
(2% by weight solution in water,
Natrasol HHR ex Hercules Limited) 120 parts
Water 240 parts
Non-ionic surfactant (Anonaid TH ex
ABM Limited) 10 parts
Pressure sensitive acrylate adhesive
(emulsion form, Vantac 343 ex
Bevaloid) 118 parts
The polyvinyl alcohol and carbon black were ball milled together for 48 hours prior to the addition of the other ingredients.
A photosensitive coating composition was compounded from the following ingredients in the following proportions by weight:
Acrylic monomer (Setalin AM 548, ex
Synthese BV) 60 parts
Photoinitiator solution (33% by
weight solution of isopropyl
thioxanthone (Quantacure ex Ward
Blenkinsop) in an amine (Quantacure
BEM ex Ward Blenkinsop)) 5 parts
Non-ionic surfactant (Synperonic NP8
ex ICI Limited) 5 parts
Acrylic copolymer emulsion (National
EP4711 ex National Adhesives Limited) 40 parts
Water 30 parts
The photosensitive layer was formed by coating this composition on to the dried coating of the image-forming layer using a No. 25 Meyer bar. The coating was dried at 50 C. for 10 minutes.
Sheets of polyethylene terephthalate 36 microns thick (Melinex 542 ex ICI Limited) were then coated with an equal parts by weight mixture of xylene and the silicone adhesive used above (DC 282). Coating was effected using a No. 25 Meyer bar and the coating was dried at 60 C.
following which the coated polyethylene terephthalate sheets were laminated to the coated release paper sheets. Lamination temperature was 70 C., lamination speed 4 m/min. and the lamination was effected by passing the two sheets through a nip between two rollers of diameter 10 cm. having a surface of rubber of Shore hardness 70-80 and just touching in absence of any interposed material.
The laminate so obtained was imagewise exposed through a transparency to ultraviolet light from a 2kw mercury metal halide lamp at a distance of 1 m. Exposure time was 5 seconds and exposure took place through the polyethylene terephthalate layer. Following exposure the polyethylene terephthalate sheet and the release paper were promptly peeled apart to reveal negative black images on the polyethylene terephthalate sheet. The surface of the images remote from the sheet felt distinctly tacky and the whole sheet could be adhered to a desired receptor surface by hand, conveniently using a hand-held roller to exclude air bubbles.
EXAMPLE 2
This is an example of a material constructed in accordance with Fig. 1 of the accompanying drawings and which operates by adhesive failure as indicated at 1(a).
Polyethylene terephthalate sheet 75 microns thick (Melinex 542 ex l.C.l.) was coated with a photosensitive composition using a No. 20 Meyer bar. The coated sheets were dried at 60 C.
The coating composition consisted of (parts by weight):
Acrylic copolymer emulsion (XX10/10
experimental emulsion (Bevaloid
emulsion ex Bevaloid Ltd.) 70 parts
Oligo triacrylate (OTA 480 ex
UCB BV) 25 parts
Water 20 parts
Carbon black dispersion 4.5 parts
Surfactant (Synperonic NX ex l.C.l#) 1 part
Photoinitiator (Quantacure ITX
(33% by weight solution in
Quantacure BEA ex Ward Blenkinsop) 3.2 parts
Pressure sensitive acrylic adhesive
(Vantac 343 ex Bevaloid Ltd. 12.3 parts
The carbon black dispersion was made by ball milling 10 parts by weight carbon black (Elftex 150 ex Cabot Carbon) in 90 parts by weight of a 10% by weight polyvinylalcohol solution in water (Gelva 40-20 ex Monsanto).
Separately a coating composition was made of an equal weight mixture of silicone adhesive (DC 282 ex Dow Corning) and xylene and this mixture was coated on to polyethylene terephthalate sheets of the same type and dried at 60 C. Coating was with a No. Meyer bar.
The two polyethylene terephthalate sheets were then laminated together by passing through a heated nip (70 C) at a speed of travel of 4m/minute. The nip gap was 0.0 mm and the nip rollers were made of rubber of Shore hardness 70-80.
The photosensitive material thereby obtained was then exposed to actinic radiation via an image bearing transparency which was in contact with the polyethylene terephthalate sheet adjacent the silicone adhesive layer. After exposure from 2 Kw mercury metal halide arc at a distance of 1 m for 7.5 seconds, the substrates could be peeled apart to leave on the polyethylene terephthalate sheet bearing the silicone adhesive coating a black, permanently tacky image corresponding to the original.
EXAMPLE 3
This is an example of a material constructed in accordance with Fig. 3 of the accompanying drawings and which operates by adhesive failure as indicated at 3(a).
Silicon adhesive coated sheets of polyethylene terephthalate were prepared as in Example 2.
Sheets of silicone release paper (30/1 02 ex Jointine Limited) were then coated using a No.
15 Meyer bar with a pressure sensitive adhesive non photosensitive pigmented layer from a coating composition and then dried at 60"C. The coating composition was as follows (parts by weight):
Polyisobutylene (Hyvis 200 ex
B.P. Limited) 65 parts
Polyisobutylene (Oppanol B50
ex BASF) 43 parts
Tackifier (Stabalite ester 10
ex Hercules Powder Co. Ltd) 17.5 parts
Carbon black (Elftex 150 ex
Cabot Carbon) 53.6 parts
Finely divided silica (Aerosil
300 ex Degussa) 6.7 parts 2-ethoxy ethanol 20 parts
Silicone adhesive (DC282 ex
Dow Corning) 14.7 parts
Hydrocarbon solvent (Exsol ex
B.P. Limited) 1153 parts
After drying the sheets were overcoated using a No. 20 Meyer bar with a photosensitive coating composition as set out in Example 1 and this coating was then dried at 60 C.
The coated silicone release paper sheets thus obtained were then laminated to the silicone adhesive coated polyethylene terephthalate sheets by passing through a heated nip as set out in
Example 2 and the laminate then exposed as likewise set out in Example 2. On peeling apart the sheets after exposure, permanently tacky black images corresponding to the exposed portions were left on the polyethylene terephthalate sheets.
The words ELFTEX, QUIKLEASE, GELVA, GELVATOL, NATRASOL, ANONAID, VANTAC,
SETALIN, QUANTACURE, SYMPERONIC, OPPANOL, HYVIS, STABALITE, AEROSIL, EXSOL and MELINEX used herein are Registered Trade Marks.
Claims (7)
1. a first transparent or translucent sheet;
2. a transparent or translucent layer of permanently tacky pressure sensitive adhesive;
3. an adhesive image-forming layer, which image-forming layer comprises
i) a layer which is both photosensitive and non-transparent or translucent, or
ii) a first layer which is photosensitive but otherwise non-light absorptive adjacent the layer of permanently tacky pressure sensitive adhesive and, adjacent this first layer, a second nonphotosensitive layer which second layer is non-transparent or translucent,
wherein the image-forming layer also comprises a permanently tacky pressure sensitive adhesive component, either as a separate layer on top of layer (i) or the second layer of (ii), or incorporated into layer (i) or the second layer of (ii), and
4. a second sheet adherent to the image-forming layer, wherein after image-wise exposure to actinic radiation and peeling apart of the sheets the image-forming layer shears along the edges of the image areas so that the peeled apart transparent or translucent sheet bears the pressure sensitive adhesive layer overall having thereon in image areas indicia formed of non-transparent or translucent material from the image-forming layer and having an outer adhesive surface.
2. A sign making material accordng to claim 1 and incorporating a further layer of pressure sensitive adhesive between the adhesive image-forming layer (3) and the second sheet (4).
3. A sign making material according to claim 2 wherein the further layer of pressure sensitive adhesive has been formed by coating onto the second sheet (4).
4. A sign making material according to claim 2 or 3 wherein a pigment is incorporated in the additional layer of pressure sensitive adhesive.
5. A sign making material according to any one of claims 1 to 4 wherein the image-forming layer comprises a first layer which is photosensitive but otherwise non-light absorptive adjacent the layer of pressure sensitive adhesive (2) and a second layer adjacent the first layer which is non photosensitive, non-transparent or -translucent and which incorporates a pressure sensitive adhesive component.
6. A sign making material according to claim 1 and substantially as hereinbefore described with
reference to any one of the accompanying Figs. 1 to 7.
7. A sign making material substantially as hereinbefore described with specific reference to any one of the foregoing specific Examples.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB08401112A GB2153100B (en) | 1984-01-17 | 1984-01-17 | Photosensitive materials for making signs and labels |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB08401112A GB2153100B (en) | 1984-01-17 | 1984-01-17 | Photosensitive materials for making signs and labels |
Publications (3)
Publication Number | Publication Date |
---|---|
GB8401112D0 GB8401112D0 (en) | 1984-02-22 |
GB2153100A true GB2153100A (en) | 1985-08-14 |
GB2153100B GB2153100B (en) | 1987-05-28 |
Family
ID=10555073
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB08401112A Expired GB2153100B (en) | 1984-01-17 | 1984-01-17 | Photosensitive materials for making signs and labels |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB2153100B (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0365358A2 (en) * | 1988-10-21 | 1990-04-25 | Hoechst Celanese Corporation | Preparation of receiver sheet materials for peel developable, single sheet color proofing system |
EP0365362A2 (en) * | 1988-10-21 | 1990-04-25 | Hoechst Celanese Corporation | Negative working, peel developable, single sheet color proofing method |
EP0568744A1 (en) * | 1992-05-04 | 1993-11-10 | Hoechst Celanese Corporation | A photosensitive printing plate developed by a peel-apart process |
US6849383B2 (en) * | 2000-07-26 | 2005-02-01 | Toyo Boseki Kabushiki Kaisha | Photosensitive resin laminate, and signboard plate and signboard made of the laminate |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2029039A (en) * | 1978-08-24 | 1980-03-12 | Letraset International Ltd | Photosensitive materials |
GB2053497A (en) * | 1979-07-09 | 1981-02-04 | Letraset International Ltd | Photosensitive Materials for Making Signs and Labels |
-
1984
- 1984-01-17 GB GB08401112A patent/GB2153100B/en not_active Expired
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2029039A (en) * | 1978-08-24 | 1980-03-12 | Letraset International Ltd | Photosensitive materials |
GB2053497A (en) * | 1979-07-09 | 1981-02-04 | Letraset International Ltd | Photosensitive Materials for Making Signs and Labels |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0365358A2 (en) * | 1988-10-21 | 1990-04-25 | Hoechst Celanese Corporation | Preparation of receiver sheet materials for peel developable, single sheet color proofing system |
EP0365362A2 (en) * | 1988-10-21 | 1990-04-25 | Hoechst Celanese Corporation | Negative working, peel developable, single sheet color proofing method |
EP0365358A3 (en) * | 1988-10-21 | 1992-03-04 | Hoechst Celanese Corporation | Preparation of receiver sheet materials for peel developable, single sheet color proofing system |
EP0365362A3 (en) * | 1988-10-21 | 1992-03-04 | Hoechst Celanese Corporation | Negative working, peel developable, single sheet color proofing method |
US5565303A (en) * | 1990-12-19 | 1996-10-15 | Shaw; Sonya Y. | Photosensitive printing plate developed by a peel-apart process |
EP0568744A1 (en) * | 1992-05-04 | 1993-11-10 | Hoechst Celanese Corporation | A photosensitive printing plate developed by a peel-apart process |
US6849383B2 (en) * | 2000-07-26 | 2005-02-01 | Toyo Boseki Kabushiki Kaisha | Photosensitive resin laminate, and signboard plate and signboard made of the laminate |
Also Published As
Publication number | Publication date |
---|---|
GB2153100B (en) | 1987-05-28 |
GB8401112D0 (en) | 1984-02-22 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4640727A (en) | Graphic design article | |
KR920000202B1 (en) | Dry transfer article | |
EP0241212A2 (en) | Transfer graphic article | |
JPH0648020A (en) | Color development sheet for image transfer | |
JPH0580503A (en) | Photosensitive transfer material and image forming method | |
GB2153100A (en) | Photosensitive materials for making signs and labels | |
JPH06171243A (en) | Composite thermal transfer sheet and pattern forming method | |
US5382641A (en) | Heat-sensitive imaging material | |
JP2908740B2 (en) | Photosensitive film having layer containing heat-sensitive material and method of using the same | |
GB2129952A (en) | 'Peel apart' coloured photosensitive materials | |
JP2007279760A (en) | Method of making improved relocatable blank signage sheet | |
JPH083520A (en) | Light-shielding tacky adhesive sheet | |
JPH05295696A (en) | Pressure-sensitive adhesive sheet | |
GB2029039A (en) | Photosensitive materials | |
JP3239595B2 (en) | Image forming material | |
JPH07172075A (en) | Composite thermal transfer sheet | |
JP2003011551A (en) | Delivery slip | |
JP3045528B2 (en) | Thermal sublimation transfer receiving paper protection sheet | |
JP2551656Y2 (en) | Removable pressure-sensitive adhesive postcard | |
JP3239594B2 (en) | Image forming material | |
JP3239571B2 (en) | Image forming material | |
JPH071634Y2 (en) | Transfer mask film | |
JPH079161Y2 (en) | Transfer film | |
JP2004323658A (en) | Pressure sensitive adhesive sheet having function of indicating peeled-off and manufacturing process of the pressure sensitive adhesive sheet | |
JPH0539974U (en) | Laminate transfer sheet |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |