DE2365097A1 - LETTER TRANSFER SYSTEM - Google Patents

Description

The present invention relates to the formation of graphics Characters such as letters, numbers, symbols and images and, in one aspect, the formation of graphic characters, the can be transferred to a substrate.

Many systems are known through the graphic characters faster than by writing on the surface by hand a graphic work can be applied. One of these systems consists of a number of graphic characters, the releasably attached to a sheet and provided with a pressure-sensitive adhesive on the exposed surface. A chosen one of the characters on the sheet is transferred by generally applying its adhesive-coated surface to the under- ' position and rub the back side so that the character adheres to the base while at the same time its binding with the bow loosens. With this system everyone has to

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Aligning letters individually on the graphic work is usually a large supply of drawing sheets required, and some waste must be accepted, since the division of the characters on the arches is rare corresponds to the needs of the user.

In other systems that are intended to circumvent these difficulties, graphic characters are optionally displayed with a Coated strip material applied by exposing it through a stencil. In one of these Systems does the exposed area change color? in another system, character formation is latent and required a photographic development for visualization. Neither of the two systems allows the individual to be transmitted Characters, so that the entire strip must be applied to a base «·

The US-PS 3 * 490,362 proposes a system in which with Adhesive coated graphic characters sequentially through a transparent deformable carrier strip a colored material coated with an adhesive. The characters are spaced from each other carried by the carrier strip until you place them on a surface transmits. However, this can only be done proportionally Create simple characters and the breaklines of the die-cut characters can be used for many use cases too be a little smooth.

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The closest prior art to the present invention comes from your general unrelated area printing technology, and reference is made to US Patents 2,208,777, 2,954,311 and 2,955,531.

The present invention enables the production of graphical signs that are instantly visible and self-evident consequently can be precisely aligned on a strip and have such a high resolution that even half-tone photographs play back. The strip with the characters can be used as a graphic design element or the characters can be transferred from the strip to a graphic work.

The graphic signs are on a "composite" trim material formed, which (1) a receiving tape made of a layer of latent adhesive material and (2) a release web having a lightly adherent layer of microgranules in direct contact with the layer of adhesive Materials. At least one of the microgranular and adhesive layers carries a radiation absorbing pigment. For example, the pigment can be contained in one of the layers or, if the receiving tape consists of a receiving web, with an adhesive layer, sicn between the adhesive layer and the receiving path. The strip material should be substantially transparent to radiant energy between an outer surface and the pigment so that

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the pigment can be exposed to the heat-generating radiation can. With short-term exposure in a radiation pattern the pigment is selectively heated and briefly softens the adjacent rope of the adhesive layer, which after resolidification sticks to the microgranules. The graphic sign formed by the radiation pattern is immediately visible, making it easy to precisely set and align the radiation pattern for the next drawing. After this all graphic characters are formed, become the recording tape and the delivery path separated, whereby the microgranules only in the irradiated areas on the receiving belt pass over.

The composite strip material must have an intensive short-term Receiving radiation in a sharply defined pattern to form sharply defined graphic marks. The adhesive material, must soften and freeze again almost instantly, to ensure ^ that the lateral dissipation of heat in the adhesive layer immediately next to the absorbed Radiation pattern remains negligible. The preferred means used to generate such Radiation is a xenon flash lamp that emits a broad spectrum of bluish-white light in a flash lasting less than 5 ms gives away. The minimum radiant energy required to form a graphic character is approximately ρ watt per square inch of exposed strip material (0.8 W per square centimeter of exposed strip material)

0 9 8 2 870 8 5 0

the energy level preferably used being at least 50 v / s (ie at least 25 kW for 2 ms) per square inch of exposed strip material or 7 »7 Ws per square centimeter of exposed tire material. In a xenon exposure system, the efficiency of which is initially estimated at $ 70, an input power of 100 Ws per square inch of area to be exposed (15 »5 Ws per square centimeter of area to be exposed) has proven to be suitable for the formation of excellent graphic characters, with one being sufficient Excess power remains in order to absorb mains voltage fluctuations and loss of efficiency of the lamp as a result of its aging.

The radiation pattern can be, for example, through a sharply outlined window that is transparent to the radiation in one create impermeable stencil. Since the xenon flash lamp is not a point radiation source, it is desirable that the To keep the stencil in intimate contact with the transparent web so as to allow for the radiation pattern picked up by the pigment results in an optimal edge resolution. The template is preferably made highly reflective, so that it can be very thin and yet the shielded radiation does not heat up so much that the adhesive material softens in the non-irradiated areas. One The stencil, which is preferably used, consists of a radiation-permeable film with a highly reflective coating, which has at least one sharply defined opening,

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which forms a window corresponding to the graphic character to be formed in the template. For use with a xenon flash laaipe of up to 100 IcW per square inch of exposed area (15 »5 kW per square centimeter of exposed area) in 2 ms, a light copper layer has proven to be suitable, while a light aluminum layer with a degree of reflection of more than 88 ⁰ Jo is suitable for most of the wavelengths generated by the xenon flash lamp.

The pigment should absorb the radiation with high efficiency. "Preferably, carbon black is used, which has approximately the absorption efficiency of the black body. Apparently, the entire light spectrum generated by a xenon flash lamp is absorbed if carbon black is used as the pigment, because it has been shown experimentally that the efficiency of the transmission of radiation to the strip material is reduced, if you filter out a rope of the spectrum «

Preferably the pigment is incorporated into the layer of microgranules. This arrangement ensures an immediate transmission path to the surface of the adhesive layer to be softened. The pigment also serves as a coloring substance for the microgranules and gives dark characters. The pigment is in the layer of micrograins. becomes the strip material preferably irradiated through the receiving web to first cover the surface of the microgranules in contact with the adhesive material to warm up; in this case it should be the receiving lane

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and the adhesive layer is substantially radiolucent be.

If graphic characters in a light color are desired, luicroi granules of this light color can be used in connection with a recording tape which consists of a recording web, a pigment coating arranged on this and a thin layer of adhesive adhering to the pigment coating. When heated by radiation, the pigment softens the thin adhesive layer from the side opposite the micrograin layer. With this arrangement of the pigment, a somewhat higher irradiance is required than if the pigment is located in the micrograin layer.

The microgranules should be ma discrete particles, that are homogeneous (e.g. consist entirely of a thermoplastic resin) or heterogeneous (e.g. with a thermoplastic resin coated glass beads). Mixtures of different Particles can be used, such as a Mixture of thermoplastic and iron oxide particles * The microgranules are formed by, for example, melting together the thermoplastic i'eilchen or combined with one another by adding an adhesive, but preferably in such a way that the layer is friable and separates between the granules «A class of thermoplastic resins? with which particulate Coatings light; Can be produced from aqueous dispersions, ionomeric resins such as the acid-modified ethylene-vinyl acetate copolymers (e.g. "Elvax" D-1288).

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The micrograins should be small enough to To allow parting line that is generally perpendicular to the surface der.Abgabebahn and exactly the circumference of an irradiated So that the outline of the generated character is clean and sharp »microgranules with a medium diameter from up to -4 to 5 / u are considered suitable, whereby preferably 0.1 to 5 / u are used.

The layer of microgranules should be sufficiently thick the characters to be generated in a particular application to be optically opaque. The required density can be achieved through opaque microgranules or by sealing the spaces between the granules with a pigment - such as the above-mentioned radiation absorbent Pigment - fills in. The layer structure that is preferably used contains microgranules of acid-modified Ethylene vinyl acetate ^ iischpolymerisat and a rope soot on 6 parts by weight of microgranules. At a 5 to 5 »5 micrometer thick, filled layer of microgranules is an optical one Density of about 3 »ο has been measured. The layer thickness required for a special application can be determined from this measurement estimate. Used in accordance with the present invention graphic characters generated directly as masks for UV light in the production of printing plates and screen printing stencils, an optical density of 2 is acceptable, ^ uid a thickness of 4 »5 / u (loo microinches) produces a sufficient optical density far above 2, in order to

BATH ORIGINAL

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hitting distance ζα. .Venn a layer of the above IvIi kr ο kör nc υ en titanium dioxide in a weight ratio of Contains 1 to 2 to u microgranules is a 6 / u (250 microinches) thick ivi microgranular layer required to produce white

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To produce an optical density of 0.3. When transferred to a black surface, these white characters have a sufficient contrast for the production of derriseh camera cards, from which white images can be electronically superimposed on the television images. There should never be a need for a micrograin layer greater than 25 / u ( o.ool inch) thick, and the webs should be separated after exposure of the strip material if the entire thickness of the micrograin layer in the irradiated parts of the strip material should adhere to the receiving tape . This ensures that the characters produced have the required thickness and opacity, furthermore the layer of micrograins remaining on the delivery web then has clean openings which correspond to the characters produced; this layer can be used as a negative design element - especially when the color of the release lane contrasts with that of the microgranules.

the microgranular layer is generally non-porous, permeates the softened glue does not cover the layer; in this case, "the micro-grain layer should have a larger cohesive force than have their adhesive strength to the delivery lane. Is the micro-grain layer porous and the adhesive strength of the micro-grains to the

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Release lane higher than its cohesive force, muli da.j adhesive material sufficiently flowable when the strip material is irradiated to penetrate into the gaps and at each to naft individual micro-grains »

if the microgranules are made of a thermoplastic resin, that acts as an adhesive when softened graphic characters carried by the recording tape on a base glue? by simply applying sufficient heat through the receiving tape to cause the thermoplastic Resin to soften, Furthermore, after separating the Aufnahraebandes from the delivery tape on the latter can be Microgranules by applying heat. Through the delivery path transferred through to a substrate, after which the release sheet is peeled off and a negative of the graphic characters is obtained.

ϊίο the micrograins consist solely of thermoplastic resin, the micrograin layer should contain a substantial amount of pigment in dispersed form in order to achieve well-defined characters. Preferably, one part of carbon black per 6 parts by weight of microgranules or about one part of other pigments such as titanium dioxide is used for 2 parts by weight of microgranules. If the amount of pigment is too high, the adhesion to substrates may be too poor the amount of carbon black was one part or less per 4 parts of the thermoplastic laicro granules

If the recording tape has a recording lane, the the latter as thin (preferably less than 25 / rev or ο, οοΐ

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Inch) be bescniciruet that there is just a sufficient Adhesion to the microgranules, so that the amount of radiant energy, which is required to soften the adhesive remains as low as possible. The glue should be inside soften a relatively narrow temperature range that is sufficiently high above room temperature (e.g. öO ° C) that shipping and storage are possible without refrigeration, Depending on the instant the adhesive has softened, it should get moist and adhere to the granules. Is it in the case of the strip material, one with which the graphic Transferring marks from the recording web to a base the adhesive that softens during transfer should be in the. softened state to be sufficiently sticky so that the Aufnamiebahn does not slip on the surface and the characters just transmitted are damaged. Regardless of whether the recording tape has a recording web, the softened adhesives preferably do not have the tendency to adhere to the substrate onto which the characters are transferred and continue to be relatively transparent, so that adhesive portions that still adhere to the base, the appearance the characters do not interfere.

j3in einzusetzender with a Aufnaiüüebahn adhesive contains a high proportion of a paraffin wax that softens at low radiation energy at a sharply defined softening temperature of 6O ⁰ C. Only a strip material suitable for the formation of transferable graphic characters are preferred

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wise approximately equal proportions of paraffin wax as / ie each of two other adhesives used, namely (1) an ethylene- ^{vinyl acetate mixed polyamide, preferably with about IS e} jo vinyl acetate (e.g. "Elvax" 46o) to prevent the receiving web from slipping on the to prevent backing when the adhesive softens during the transmission, and (2) a transparent polymerized • overbased hydrocarbon (eg. "Polyeth · ¹ 7oo53) to a transfer of the adhesive stop to the substrate during transfer of the characters to.

The delivery web and the receiving tape should have sufficient strength and dimensional stability within the temperature range to which the strip material is exposed in order to avoid distortion of the characters. In addition, the delivery sheet should have poor adhesion to the microgranules. If the receiving tape has a receiving track, good adhesion to the solidified adhesive layer must be ensured. A suitable material for both the dispensing and receiving webs is biaxially oriented polyethylene terephthalate film 0.025 mm (ο, οοΐ inches) thick. The delivery web or the receiving tape can be equipped for direct application to a base after the formation of the markings ₉ by applying a pressure-sensitive adhesive to the side opposite the microgranules, which is protected by a detachable layer which is removed for use.

The invention will now be described in detail with reference to the accompanying

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attached drawings, in which like reference numerals denote the same parts.

Fig. 1 is a schematic partial section of a first embodiment the composite strip material according to the present invention Invention}

Fig. 2 is a schematic partial section of a second embodiment. of the composite strip material according to the present invention}

Fig. 3 is a schematic perspective of an arrangement for Creation of graphic characters on the composite strip material according to Fig. Ij

Fig. 4 is a schematic partial section through the composite ■ strip material according to FIG. 1 with graphic characters produced thereon, with partial separation, in order to facilitate the transfer of the Show microgranules from delivery to receiving lane; FIG. 5 is a schematic partial section of the severed recording web according to FIG. 4 and shows the transfer of the characters from the Aufnahuiebahn to a base in application of the present Invention;

Fig. 7 is a schematic partial section through a third embodiment of the composite strip material according to the present invention Invention;

8 is a schematic partial section through a fourth embodiment of the composite strip material according to the present invention, and FIG
9 is a schematic partial section through a fifth

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Embodiment of the composite meeting material according to the present invention.

Fig. 1 shows a 'first, preferably used embodiment of the composite strip material according to the present invention, which is indicated generally by the reference character Io and preferably used to create dark colored characters will. The strip material Io consists of a receiving belt 11 and a transfer belt 12. The belts 11 and 12 each have a coating and are arranged with the coatings one on top of the other.

The receiving tape 11 consists of a solid, heat-stable Receiving web 14 and a firmly adhering coating of adhesive material 15 with a narrow softening area above normal ambient or room temperature. Both the recording track 14 and the adhesive 15 are essentially radiolucent. The transfer belt 12 has a solid heat stable Delivery track 17 and a coating 18 of microgranules that releasably adhere to the delivery path. In shift 18 of microgranules is a radiation-absorbing pigment such as carbon black, which is attached to the adhesive 15 at the interface between the belts 11 and 12 is in contact.

3 shows schematically a suitable device (denoted by the reference numeral 2o) for the formation of graphics Marks on the strip material Io according to the present invention. The device 2o represents the US patent

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.236509?

message 406.548 is the arrangement described; in this US patent application it is a GIP registration for U.S. Patent Application 318,258 and is disclosed for illustration in the present application was included.

The device 2o contains, in short, a device for storing the spools 22 and 24 of the tapes 11 and 12, respectively, and for Guiding the tapes on a track in such a way that the adhesive layer 15 and the layer 18 of microgranules lie against one another and form the composite strip material.

The opaque template is in the form of a thin, strahlungsdürehlässigeii disk 26 in front of, on the underside a highly reflective metal coating is applied. Sharply defined openings in the metal coating form a series of Windows 28 in the shape of the graphic characters to be formed. The disk 26 is rotatably mounted around the window 28, respectively to bring over the receiving path 14 of the strip material Io. A glass plate 30 lies over the window and a movable piston 34 provides a clamping device which holds the strip material Io and the pane 26 presses against the glass pane. A xenon flash lamp 35 then irradiates the strip material through the glass plate 3o and the aligned window.

The device 2o also has a manually operable drive device which - not shown here - the strip material Io advances on the web between the exposures by the xenon lamp 35 so that the graphic characters 37 can be produced one after the other on the strip material 10.

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After exposure , the delivery and receiving webs 17 and 14 of the tire material Io can be separated, as FIG. 4 shows. The microgranules from the layer 18 adhere to that part of the adhesive 15 'which softened during the exposure by the xenolamp 35 and are transferred to the recording web 14 in accordance with the pattern of the recorded radiation. This transfer results in sharply outlined graphic characters 37 on the receiving web 14 and an equally sharply outlined negative of these characters which remains on the output web 17.

Lord, the layer 18 bestehtj the microgranules of a thermoplastic resin which becomes adhesive when softened, the film formed on the recording sheet 14 graphic characters 37 or the negative blank on the discharging path 17 by applying heat through the sheet 14 passes onto a substrate transferred . iV'ie in the Pig. 5, the microgranules forming the characters 37 are brought up to a base 39 and activated by the application of heat with a hand-held heater 41 which is pressed against the opposite surface of the receiving web 14 and peeled therefrom. The heat softens the adhesive 15 and enables the Aufnahniebahn to be pulled off. In a corresponding way, the negative of the characters can be transferred to the substrate 39 by applying heat to the separated release web 17; see Pig. 6 »

The heating device 41 can consist of an electrical 7th ^r ider-

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Stand heating element 43 exist in a metal housing 45, the controlled with a conventional, not shown thermostat is to the peripheral surface of the housing in the immediate To keep the vicinity of the heating element at a predetermined temperature.

Fig. 2 shows a second embodiment of the composite strip enoiaterials according to the present invention; it is generally designated by the reference numeral 5o and has webs or layers similar to those of the strip material Io correspond to FIG. 1 with the same reference numerals. The embodiment shown in the form of the strip material 5o is particularly suitable for the production of light colored graphic characters. The strip material 5o consists of one Receiving belt 11a and a transfer belt 12a. The transfer belt l-2a consists of a release sheet 17a and a releasably adhering layer 52 of microgranules which may contain a light colored material such as titanium dioxide. The receiving tape 11a has a radiation-permeable receiving web 14a, which has an adherent coating 54 made of a radiation-absorbing Carries pigment like sweet in a polymer binder. An adhesive layer 15a covers the pigmented coating 54 · Graphic characters can be generated using the device 2o shown in FIG through the receiving web 14a, selectively irradiated to the pigmented aberzug 54 to heat and the adjacent To soften adhesive material and so transfer microgranules from layer 52 to receiving sheet 14a, if

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the latter is separated from the delivery path 17a. After the Vfärmeübex "transfer On a base as in FIG. 5, the pigmented coating 54 is combined with the receiving sheet 14a peeled off, leaving behind light colored graphic characters.

γ / ie shown in Fig. 7, light-colored characters also represent with the composite strip material 6o. The recording tape lib consists of a radiation-permeable recording sheet 14b and an adhesive layer 15b. The delivery path 17b of the transfer belt 12b has a firmly adhering one Coating 54b made of carbon black in a polymer binder. A layer 52b of microgranules is slightly adhered to the coating 54b and titanium dioxide pigment applied »- the strip material 6o irradiated in graphic patterns through the receiving web 14b? melts that in the soot layer 54b and / or the heat released from the titanium dioxide pigment of the layer 52b and forms the adjoining parts of the adhesive layer 15b graphical characters? which pass over to the receiving lane 15b. Since practically no huss is transferred, the resulting Characters light colored.

The ffig. 8 shows a composite strip material similar to the strip material Io corresponds, again with the same parts having corresponding reference numerals. Here, however, the delivery path must 17c be radiolucent and the receiving path 14c has a coating of pressure sensitive adhesive 72 on the opposite side of the layer of waxy material 15 Page. The adhesive layer 72 is with a peelable

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Verse-hable protective overlay 74. After you see the characters has produced through irradiation through the delivery path 17c, the support 74 is pulled from the severed one . Receiving lane 14c from to reveal the adhesive coating, with which the graphic characters can be firmly attached to a base.

The Pig. Fig. 9 shows a composite strip material So which corresponds to the Strip material corresponds to Io except that the receiving tape lld consists of only one layer of an adhesive which is placed directly on the layer 18d of Liikrokö'rnehen · on the delivery track 17d of the transfer belt 12d rests. Self-supporting layers of plywood, which have been found to be useful for the purposes of the present invention are, for example, films from ethylene-yinylacetate and low molecular weight serephthalate esters. For best results, such films should have a thickness of 10 to .80 / rev and a softening point in the range from 50 to 95 ° G "(ASüM method E-28, Part 50).

The present invention will now be explained with reference to the following examples, in which in the absence of other information all parts are v / i cht parts and the scope of the invention should not be bound.

example 1

To prepare a dispersion of pigment and microgranules 18 to produce a transfer belt 12 according to FIG. 1,

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an open mixing vessel containing 180 parts was deionizedexa Water, 6 parts of 12M amniotic fluid and 10 parts of one Sodium salt of a condensed naphthalene sulfonic acid (e.g. Tainol 5.N.) charged. The batch was about 5 min. mixed, after which 50 parts of carbon black pigment with further mixing were added slowly to prevent clumping. The resulting mixture was pumped through a sand mill with 0.8 mm glass beads for about four hours until the Mixture appeared mirror-smooth under the microscope under 6o magnification when illuminated at an angle.

4y parts of a 50yoigen aqueous solution of an acid-modified ethylene-vinyl acetate copolymer (Elvax D 1288) were charged in an open vessel with a propeller mixer and 20 parts of sand milled carbon black mixture is added (about 20 io solid content) slowly was being taken to ensure no To mix air into the dispersion. This dispersion was passed once through a homogenizer available under the trade name "G-aulin". 25 parts of the homogenized material, diluted with 75 parts of deionized water, were returned to the open vessel and 1-1 / 2 parts of a thickener, namely a high molecular weight polymer, with a large amount of carboxylic acid groups (e.g. Rohm & Haas "Arcrysol ASE-95) j slowly added - Part of a nonionic wetting agent was added to the thickened mixture (e.g. Igepol CA-63o ^:) .

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The resulting dispersion was then cut up with a blade a biaxially oriented polyethylene terephthalate release sheet 17 is coated and dried at less than 6o G, after which they apply a 4.5 / u (18o microinches) thick dry layer formed. The dry layer was found to be substantial

iicr ο granular and almost void-free. The microgranules had an average diameter of about 0.3 to 1 micrometer.

To produce a Aufnahiuebandes 11 was a waxy Adhesive material made by placing 8o 'of toluene in an open Jar and each 6.5 parts of a paraffin wax, of a polymerizing hydrocarbon (e.g. polyeth 7oo5'3) and an ethylene-vinyl acetate mixture polynesized (e.g. Elvax 46o).

- This mixture was heated to 95 g and easy to dissolve curled.

The heated solution was applied to a gravure metering roller with a knurl of 28 lines per cm (70 lines per inch) a 0.025 mm thick transparent, biaxially oriented polyethylene terephthalate film is applied; the resulting Coating was done with a curved blade heated to 95 ° C smoothed and then dried to a thickness of 5 / U (2oo microinches).

The adhesive material 15 on the resulting receiving tape 11 was attached to the micrograin layer 18 of the transfer tape 12 applied and the resulting strip material Io one

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Subjected to pressure of 3.5 kg · / cm (50 p.s.i ".) And then through

to the receiving tape 11 through with a xenon exposure order according to the i'ig. 3 exposed, the efficiency of which was ^{estimated at 70 c} / ö. A copper-clad stencil 26 was used. When the xenon lamp 35 was set to a flash duration of about 2 ms and an input power of about 7 »7 V / s per square centimeter of exposed area (50 Ws per square inch), there were sharply outlined characters with a resolution of more than 200 Lines per inch (79 lines per centimeter). A similar exposure with an input power of 15.5 Ws per square centimeter of exposure area (100 Ws per square inch) gave higher reliability for the formation of the characters with slightly improved resolution.

Its exposure for 2 ms with a xenon lamp input power of more than 31 Ws per square centimeter of exposure area (2oo Ws per square inch) required use an aluminum-coated stencil 26, since the copper stencil uses the adhesive 15 in the next exposed legends Let parts of the surface soften slightly.

As the delivery and receiving paths 17 and 14, respectively, after exposure were separated under the above-mentioned conditions, the micrograin layer 18 adhered in the irradiated Surface parts of the strip material in their entirety Thickness to the adhesive layer 15 on the receiving sheet.

The graphic characters formed on the recording tape 11

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37 could easily be applied to a fibrous base such as paper by attaching the base to the characters 37 and with a heater 41 with a temperature of 80 to 115 ° C on the exposed side of the receiving web 14 warmed. The signs 37 showed only a slight tendency to slip and close during the transfer deform. Most of the adhesive remains the removal of the adhesive portion on the receiving web 14ϊ, the Lait transferred, impaired the appearance of the graphic Sign not.

The micrograins remaining on der.Abgabebahn 17, the now the cutouts corresponding to the characters 37 formed on the receiving tape 11 could be applied to the above described i / eise with avoidance of the heating device 41 leictit from the delivery track 17 onto a fibrous base transfer.

Example 2

Bin iJtreifenniaterial was prepared as in Example 1 except that the transfer belt 12 with a dispersion with 30 parts (20 parts non-) was prepared sandvermahle- NEN mixture containing the carbon black. " The resolution of the characters produced with this strip material was very similar to the resolution of the characters 37 »: which had been formed with the strip material of Example 1. When the signs were transferred to certain documents, the thermoplastics »

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do not see microgranules as firmly as they do for some use cases would be desirable because the soot content was very high.

example 3

Bin! Strip material was made as in the. Example 1 made, except that the transfer belt 12 was made with a dispersion which instead of 20 particles milled only 15 parts of the sand Mixture with huss content.

The performance of this strip material was that of the strip material very similar to example .1, except that the graphic characters generated are somewhat smaller, but always still had sufficient opacity.

Example 4

A strip material was produced as in Example 1, except that the recording tape with 20 'parts of a natural paraffin wax prepared and the polymerized hydrocarbon and the ethylene-yinylacetate mixed polymer from the adhesive layer have been omitted.

The resolution of the graphic produced with this strip material Character was good or better than what was presumably attainable under appropriate conditions with the material of the example!. because the adhesive according to your present example has a lower and more sharply defined melting point (6o.8 ° C = 141.5 ° #).

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However, the transfer of the characters produced to a substrate was more difficult because the receiving web had a tendency to slip on the melted adhesive layer which touched the substrate, thereby deforming the characters
furthermore the heating device 41 shown in FIG. 5 at
When transferring the characters was used, the molten adhesive material showed a strong tendency to form an undesirable, visible wax film around the substrate and around the transferred characters. This transfer of the
Adhesive material could be reduced considerably by means of a radiant heating device with, for example, a 2oo-W Larape, which was focused by means of a reflector. The pigment selectively absorbed the radiation and heated and activated the adhesive microgranules in the characters without any significant softening Adhesive material.

■ Example 5

A strip material was produced as in Example 1,
except that 14 parts of paraffin wax and 6 parts of the polymerized hydrocarbon without ethylene-vinyl acetate copolymer were used.

The resolution of the characters produced with this strip material was the same as that with the strip material
generated according to the example ^.

When the characters generated were transferred to a substrate, the inclination of the receiving path was somewhat greater

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the melted glue tends to slip when on strike Fe.nmaterial according to Example 1. However, this tendency was much less pronounced than with the strip material according to the Example 4. V / urde the forest heating device to transmit the characters 41 after 3? 5 used, the softened adhesive showed only a slight tendency to adhere to the substrate, and that part which nevertheless stuck, left no pronounced film around the transferred characters return.

Example 6

A strip material was produced in Example 1, except that 20 parts of the ethylene-vinyl acetate copolymer (Elvax 46o) and the paraffin wax and the polymerized hydrocarbons have been omitted.

The resolution of the graphic produced with this strip material Character was as good or better than the characters obtained with the strip material according to Example 1 - presumably because the adhesive strength of the present material was higher.

When the characters generated were transferred to a base, there was only a slight inclination of the delivery path 17 of the melted adhesive layer 15 to slip. However, it was a resistance heater 41 as used in FIG. 5 for transferring the characters remained a fairly high one Part of the pine layer adhere to the substrate.

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Example 7

Strip material was produced as in Example 1, except that the Auf nah.-ie path is a white glossy lithographic paper with Oriess coating (27.22 kg / ream = 6o Ib./Ries). the the web surface opposite the IC top layer was with a layer of a pressure sensitive adhesive which was in turn protected with a silicone-treated paper cover.

The resulting strip material, which had the construction shown in FIG. 8, was applied to that described in Example 1 Yreis exposed to radiation patterns, the radiation being directed through the delivery path. the The resolution of the characters produced was excellent and only slightly less than that of the characters produced with the Strip material according to Example 1 had received. The reception train with the characters could be applied perfectly to a base using the pressure-sensitive adhesive, after the protective cover has been peeled off.

Example 8

A dispersion was prepared by adding 400 parts of steel balls with a diameter of 5 mm. (1/8 inch), 16 parts of acicular V * -Pe ₂ O ₅ particles having a particle length of 0.5 / u and a length / width ratio of 4 s 1, 0.6 parts of a surfactant phosphorylated ethoxylated long chain alcohol and Put 18 parts of toluene in a container,

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this was closed and shaken vigorously for 19 minutes, after which 21 parts of a 35.6% solution of a vinyl chloride copolymer of the VYHH type in ethyl ethyl ketone added uri the container was shaken again for 3 minutes. The balls were then sieved out of the dispersion and the Dispersion with a blade on a biaxially oriented polyethylene terephthalate film with a thickness of o, o25 mu (ο, οοΐ Inches) and dried at about 93 ° 0 to provide a transfer barid with a 0.025 mm thick layer of micro-granules share heart. The iron oxide microgranules were so loosely attached to the dispensing belt that they could easily be touched with your finger wegvviscue'n or wash off under running tap water, let.

This transfer tape and the receiving tape of Example 4 • was put together and the resulting strip material subjected to a pressure of 3.5 kg / cm (about 50 p.s.i.) and through the take-up tape using a copper clad reflective mask for 2 ms with a Xenoh flash lamp with an input power of more than 7.7 Ws per square centimeter of exposed area (more than 50 Ws per square inch) exposed. There were sharply outlined graphic characters on the recording tape,

The negative of the signs on the transfer tape showed that the micro-grains in the exposed areas of the micro-grain layer completely transferred to the waxy material was. The characters on the recording lane also stayed

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stick under running tap water and were smudge-proof, which proved that the waxy material was the porous micrograin layer had penetrated completely.

-Example 9

Produce U ₁₁ I ο ir. E dispersion of a JJ'arbiiiaterials and MiArokörnchen aie for producing a transfer belt 12a in FIG. 2, an open mixing vessel was charged with 165 parts of deionized water. Water, 100 parts of titanium dioxide and 10 parts of a sodium salt of a condensed naphthalene sulfonic acid (e.g. Taiiiol Ö.N.) are charged and the batch is boiled for about 5 minutes, after which the mixture is poured through a 6 mm thick (1 / 32 inch) diameter filled sandmill was pumped until the mixture appeared mirror-smooth under the microscope at 6o magnification and oblique illumination.

4oo 'x'eile of a 50 ^ igen aqueous dispersion of an acid-modified' Ethylene-vinyl acetate copolymer ("e.g. Elvax D-12o8) were placed in an open jar with a propeller mixer and the sand-milled mixture slowly added, careful attention being paid to getting into the dispersion not to mix air.

This dispersion was applied to a delivery lane with a knife 17a from a biaxially oriented Polyäthylenterephthalat_ film painted and at less than 6o ° C to a 6 / u

(25o xiiikrozQll) thick layer 52 dried. The dry one yohicht was generally microgranular and almost voids free.

40 9828/0850

ijine dispersion. 2 to produce a pigmented coating 54 according to. J ¹ Ig. 2 was made with a binder, of which about 4 parts by weight consisted of a polyurethane elastomer (e.g. Bstane 57o3), which by reaction of a polyester with a hydroxyl end group of 1,4-butanediol and adipic acid with ρ, ρ'-diphenylmethane diisocyanate and 1,4- Butanediol was obtained without maintaining an isocyanate / hydroxyl ratio of slightly less than 0.99 ·; this resulted in a stable polymer with terminal hydroxyl groups. About one part by weight of the binder was a high molecular weight thermoplastic copolymer of equivalent amounts of bisphenol A (ie 2,2-bis (4-hydroxyphenylpropane) and the diglycidyl ether of bisphenol A (hereinafter referred to as phenoxy resin). Solutions of about a quarter The Kiss Binder and the surfactant phosphorylated ethoxylated long chain alcohol were placed in a water cooled ball mill. After grinding to a smooth dispersion, the remainder of the binder was added with continued grinding to make a smooth, coatable dispersion Crosslinking agent, namely e.in polymethylene polyphenyl isocyanate with an average of 3-2 isocyanate groups per molecule (for example PAPI of the Polychemical Division of Ja ₉ Upjohn Co.) was added. A coating was applied to a receiving web 14a of mechanically oriented polyethylene terephthalate with a gravure roller} the coating had been through after smoothing and drying h heat to a thickness of about 1 »25 / u (about 50 microinches). Of the

409828/08 6 0

The coating contained about 12 parts by weight of black per 100 parts of the crosslinked Binders. On top of this dried coating was a 5 / u (200 microinches) thick layer 15a of that used in Example 1 Glue applied to that in the pig. 2 shown Aafnahiueband 11a to create.

The recording tape 11a and the transfer tape 12a became laid one on top of the other, under a pressure of about 3 »5 kg / cm (about 5O'p..s.i.) And set through the receiving sheet 17a using a copper-clad reflective Template about 2 ms. long with a xenon flash lamp at one Singing power of 7 »7> 's per square centimeter of exposure area (5o '.Vs per square inch of exposure area) exposed. There were sharp graphic characters.

As the delivery and receiving lanes 17a and 14a, respectively, separated thereafter The micrograin layer 52 adhered in the punished J surface parts of the three-part material in whole Thickness on the adhesive layer 15a of the receiving web 14a.

The characters 37 formed on the receiving tape 11a could be applied perfectly to a fibrous substrate such as paper, by placing the characters on the base and the receiving web 14a with a heating device 41 according to FIG. 5 were heated at a temperature of 8o - 115 ° C. The signs hardly had the tendency during the application to slip and deform. Most of the Kleöier layer 15a remained on the receiving path 14aj

40982870850

Part that was not transferred discolored the base not essential.

The micrograins remaining on the delivery path 17a which sections corresponding to the characters 37 on the recording tape could be properly removed from the delivery path using a heating device 41 »as explained above 17a transferred to a fibrous base.

Example IQ

2 g of the phenoxy resin described above and 198 g of cyclohexane were mixed for 5 minutes in a shaker to dissolve the phenoxy resin. The solution was applied with a gravure metering roller with a knurl of 178 lines / cm (70 lines / inch) to a 0.025 mm thick, clear, biaxially oriented polyethylene terephthalate film. The coating was smoothed with a curved blade and dried ^{at 50 ° G.} The dry thickness was 0.75 / u (3o microinches). When this coated film was used as the receiving tape with the transfer tape of Example 1, excellent first and second transfers were obtained.

V / urde a 57% solution of the phenoxy resin for the production a coating thickness of less than 2.5 / u (loo microinches) is used, there was an excellent first transmission. The recording tape carrying the transferred characters tended to to stick to the paper documents.

The same was found when using low molecular weight

4 0 9828/08 5 0

. - 33 -

Terephthalate polyester instead of phenoxy resin.

Y / le they are used in this description, the The term "radiation transmissive" means permeability to radiant energy generating heat; and the term "radiation-absorbing Pigment "denotes a pigment which is produced by absorption of the heat-generating radiant energy warmed up.

Claims

409828/0850

Claims (1)

M 3368 Claims 1 # composite strip material for forming graphic Characters such as letters, numbers, symbols or images in accordance with the requirements of radiation patterns, characterized by that the strip material has: a recording tape (11, 11a, lib, lic, lld) from one layer a latent adhesive material (15, 15a, 15b, 15c) that is non-tacky at room temperature, but when heated in softens and is activated in a temperature range slightly above room temperature; a delivery lane (17 »17a, 17b, 17c, 17d) j and a breakable layer of microgranules (18, 18c, 18d, 52, 52b) with a mean diameter of up to '5 / U, which can be detached from the delivery path (17, 17a, 17b, 17c, 17d) adhere directly to the layer of adhesive material (15, 15-1, "15b, 15c) abut with at least one of the layers comprises a radiation absorbing pigment and wherein the composite strip material is sandwiched between an outer surface and the pigment is substantially permeable to radiant energy in order to expose the pigment for a short time To allow radiation, so that the pigment is selectively heated according to the radiation pattern and briefly the 409828/0850 adjacent parts of the layer of adhesive material (15 »15a, 15b, 15c) softens, which is then attached to the microgranules (18, 18c, 18d, 52, 52b) adheres, so that when the tape is separated (11, 11a, lib, lic, lld) and the delivery track (17, 17a, 17b, 17c, 17d) the micrograins only in the irradiated areas on the tape (11, lla, lib, lic, lld) be transmitted. 2. composite strip material according to claim 1, characterized in that the microgranules (18, 18c, 18d, 52, 52b) have an average diameter in the range 0.3 to 1 / rev. 3. ■ composite strip material according to claim 1, characterized characterized in that the radiation absorbing pigment is in the layer of microgranules (18, 18d) and that Aufnahiueband (11, lld) for radiant energy is essentially permeable to a transmission of the radiant energy to allow the radiation-absorbing pigment. 4. composite strip material according to claim 1, characterized characterized in that the uikrokranchen (18, 18c, 18d, 52, 52b) consist of a thermoplastic resin, which at one over the softening range of the adhesive material (15, 15a, 15b, 15c) lying temperature, so that when the Receiving belt (11, lla, lib, lic, lld) and the delivery track (17, 17a, 17b, 17c, 17d) the micro-grains (18, 18c, 18d, 52, 52b) that are transferred to the recording tape (11, lla, lib, lic, lld) and those on the delivery track (17, 17a, 17b, 17c, 409828/0850 17el) remain by applying sufficient heat to to soften the resin, can be applied to a base (39). 5. composite strip material according to claim 3 »characterized in that the radiation-absorbing pigment carbon black and the microgranules (18, 18d) are made of a thermoplastic resin which, when heated to a temperature above the Softening range of the adhesive (15 »lld) lying temperature softens, whereby the weight of the thermoplastic Resin is more than four times that of carbon black. 6ο composite strip material according to claim 5, characterized characterized in that the thermoplastic resin is an acid-modified one Ethylene-vinyl acetate copolymer is. 7. composite strip material according to claim 1, characterized in that the Aufnaiimeband (11, 11a, 11b, lic) has a receiving _{web (14-14a, 14b f} 14c) and the layer of adhesive material (15, 15a, 15b, 15c) firmly one surface of the receiving web (14, 14a, 14b, 14c) adheres » 8. composite strip material according to claim 7, characterized in that the adhesive material (15 »15a, 15b, 15c) is a paraffin wax. 9 «composite strip material according to claim 7, characterized in that the adhesive material (15, 15a _S 15b, 15c) ausetwa equal parts by weight paraffin wax, a polymerized hydrocarbon and an ethylene-vinyl acetate-mixing 409828/0850. ; _v ORIGINAL Polymer consists. 10. Verbuiidstreifenaiaterial according to claim 7 »thereby characterized in that the adhesive material (15, 15a, 15b, 15c) from a paraffin wax and a polymerized hydrocarbon consists. 11. composite strip material according to claim 7, characterized characterized in that the adhesive material (15., 15a, 15b, 15c) consists of a high molecular weight copolymer from equivalent amounts of bisphenol A and the diglycidyl ether of bisphenol A. 12. Verhundstrichmaterial according to claim 1, characterized characterized in that the Aufnahaieband (lld) only from the Adhesive material. 15. composite strip material according to claim 12, characterized characterized in that the adhesive material (lld) made of ethylene-vinyl acetate with a softening range of 50 to 100 o ordered. 14 · composite strip material according to claim 12, characterized daii that Kleberiaaterial (IId) a low molecular weight polyester having a Brweichungsbereich of 5o to ₀₀ ⁰ I G is. 15 · composite strip material according to claim 1, characterized GeKennüeichnet that the radiation absorbing pigment in. ^: ^ '^; ■ 409828 / U850- the layer of microgranules (18c) is present, the delivery web (12c) is substantially transparent to radiant energy to permit transmission of the radiant energy to the radiation absorbing pigment, and the receiving tape
(lic) on the surface opposite the micrograins (18c) with a pressure-sensitive. Adhesive (72) coated
is to apply the recording foandes (lic) to a
To enable the underlay after the graphic characters have been generated. 16. Composite strip material according to claim 7 »thereby characterized in that the radiation absorbing pigment in a coating (54) which is the layer of adhesive material (15a) on the Aufnahmetjahn (14a), and that the receiving web (14a) is essentially permeable to radiant energy is. 17. Composite strip material according to claim 16, characterized in that the radiation-absorbing pigment is carbon black
is, the microgranules (52) from an acid-modified
Ethylene-vinyl acetate copolymer and the layer of micrograins (52) contains titanium dioxide in a weight ratio of about 1 to 2 to the micrograins (52). 16. The composite strip material as claimed in claim 1, characterized in that the radiation-absorbing pigment is located in a layer (54b) which separates the rail of the micrograins (52) from the delivery bay. (17b). 4098 28/085 0 19. composite strip material according to spoke 18, thereby characterized in that the radiation-absorbing pigment is carbon black is, the microgranules (52b) are made of an acid-modified Ethylene-vinyl acetate copolymer are made and the layer of the micrograins (52b) SCitandioxyGl in a weight ratio from about 1 to 2 to the microgranules (52). 20. A method for producing graphic characters such as letters, numbers, symbols or images, characterized in that a Aufnalnaeiband (11, lla, lib, lic, lld) as a layer of a latent adhesive material (15, 15a, 15b, 15c) , which is "non-sticky at normal eating temperature, but is softened and activated when heated to a temperature above normal room temperature, and a transfer belt (12, 12a, 12b, 12c, 12d) from a delivery path (17, 17a, 17b, } 17c TJü. and a layer of MiKrokürncheii (18, 18c, 18d, 52 _S 52Tb) of an average diameter vöii up to 5 / u provides, said microgranules releasably abebahn (17, 17a on the Ab ^. yjh _1, 17c , 17d) adhere, at least one of the layers (15, 15a, 15b, 15cj 18, 18c, 18d, 52, 52b) contains a radiation-absorbing pigment and at least one of the tapes (11, lla, 11b, lic, lldj 12, 12a, 12b, 12c, 12d) essentially permitting the passage of radiation *, energy from an Au the outer surface is at least ■ zuiji pigment; that one continues to lay the layers (15, 15a, 15b, 15c; 18, 18c, 18d, 52, 52b) of the tapes (11, lla, 11b, lic, lldj 12, 12a, 12b, 12c, 12d) on top of one another in order to 4098287Ö8SÖ Composite strip material (10, 5o, βο, 8o) to form} that one continues to briefly irradiate the composite ■ strip material (lo, 5o, 6o, 8o) through the outer surface in a graphic pattern with radiation energy of sufficient strength so that the radiation-absorbing pigment is Heated beyond the softening area of the adhesive material (15 »15a, 15b, 15c), as a result of which the layer of adhesive material (15, 15a, 15b, 15c) is selectively softened and adhered to the layer of microgranules (18, 18c, 18d, 52 , 52b) is liable? and that the receiving tape (11, 11a, 11b, lic, lld) τοη of the delivery path (17, 17a, 17b, 17c, 17d) is then separated in order to place the micrograins (18, 18c, 18d, 52, 52b) on the receiving tape (11, lla, lib, lic, lld) in the iOrm of the characters (37) according to the radiation pattern. 21. "The method of claim 2o, wherein the microgranules (18, 18d, 52, 52b) consist of a thermoplastic resin that is at a temperature above the softening range of the adhesive material (15, 15a, 15b) lying temperature, characterized in that the detached receiving tape (11, lla, lib, lld) in contact with the micro granules (37) brings with a pad (39), through the recording tape (11, lla, lib, lld) applies sufficient heat to to allow the resin to adhere to the substrate, and that the receiving tape (11, lla, lib, lld) is peeled off. 22. The method according to claim 20, wherein the micro- 409828/0850 granules (18, 18c, l'8d, 52, 5,2b) made of a thermoplastic Resin exist at a temperature above the softening range of the adhesive material (15, 15a, 15b, 15c) softened, characterized in that the separated Delivery lane (17, 17a, 17b, 17c, 17d) with the microgranules. (18, 18c, 18d, 52, 52b) with a base (39) in contact, sufficient heat through the delivery path (17 »17a, 17b, 17c, 17d) applies through, ata the resin on the substrate (39) 'and that the delivery track (17 »17a, 17b, 17c, 17d) subtracts. 409828/0850