DE1569197A1 - Embossable label tape - Google Patents

Description

The invention relates to embossable pressure sensitive adhesive label tape.

Over the past few years, label tape has gained notable acceptance in the marketplace. A popular tape is made from a plastic backing that splinters and becomes opaque when the same is subjected to fairly mild stresses, such as those exerted by the cooperation of cold stamping dies, with the embossed surfaces white against the surrounding uncontaminated background. Such tapes are typically made

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put by putting a desired color on the back of a translucent film or a Film of the type described applies, then a layer of pressure-sensitive adhesive over the dyed cover and protects the adhesive with a removable cover. When delivered to the consumer, the color shows through Foil through, giving it a more or less uniform appearance. When the tape is embossed the resulting stress makes the tape locally opaque and knows the plastic film backing, which prevents the background color from blocking through the embossing areas and the embossments appear white against the colored background in this way. When a pigmented opaque film is used, the embossed areas may appear to be either white or make a light pastel finish on the background color.

Although popular, the label tape just described suffers from certain disadvantages which limit its usefulness. The fact that it is possible

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was to get only white or very light pastel colors in the embossed surfaces, is the eye-catcher decreased and limited sales of the product. In addition, the front surface of the belt typically has an imperfect, flawed appearance, e.g. rough, dull, corroded or scratched. So far is known, no one has yet been able to overcome these disadvantages prior to the present invention.

The invention provides a product which has the desirable features of the prior art label tape has, but avoids its disadvantages. Products made according to the invention have one even, smooth outer surface, a pearlescent one Appearance and the embossed letters or other information can be any desired color, e.g. yellow, have blue, green, red, etc. The effects are surprising and these novel products are suitable for "a variety of uses and for previously inaccessible sales areas.

The invention includes a colored embossable tape structure in which over a surface a colored Backing of the genus that becomes opaque, white or pastel colored when a mild cold one

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Drawing operation is subjected to a first film or layer adhered and over the opposite one A second film or layer is attached to the surface of the base, the second film or layer is transparent and in the color of the tape structure in the presence of the transparent film or layer differs. In the drawing, which shows an embodiment, are:

Fig. 1 is a cross-sectional view of one according to the invention and FIG. 2 is a cross-sectional view of that shown in FIG Produce after it has been embossed. In the drawing there is a sheet of clear film or foil 11 (which is of the type which opacifies under mild stress) colored by its back surface is provided with a colored film or layer 12 and its front or front surface with a transparent colored film layer or coating 13. Above the colored film 12 is a ^ st Film or layer of conventional normally tacky and pressure sensitive adhesive 14 attached, the

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is protected by a removable cover 15. When viewed from the front, the color of the tape product is an additive mixture of the colored films 12 and 13; if 2.B. the film 12 is greenish (cyan) and the film 13 is yellow, the overall effect is green, ./if the tape is embossed »as shown in Fig. 2, the film 11 opacifies to a whitish or pale color in the areas 20, where it has been subjected to the embossing stress, thereby preventing the transfer of any greenish color to the front or face. In the embossed areas, the embossments are actually covered in yellow on white and therefore appear yellow. The embossed tape has such an appearance is marked by yellow detail "on a green background, the film 12 call yellow and the film 13 was greenish _t the embossed tape wärüe greenish information on a green background have. The following specific example is intended to indicate the way in which the invention can be carried out * but is of course only an illustration *

example

On one surface of an unplasticized 0.25 "Luvitherm" -? Oly7i;: ylehlorid.foiie became * tin uünnsr

Covered with a black vinyl paint containing carbon black pigment, dispersed in a methyl ethyl ketone solution of phthalate-plasticized polyvinyl chloride: polyvinyl acetate binder resin in methyl ethyl ketone. This color was obtained by diluting MRX-9243 Black Vinyl Ink (sold by Crescent Ink and Color Company) from its normal 39 % solids to 24 #, taking methyl ethyl ketone as the solvent. In use, the paint had a viscosity of 23 seconds as measured in a Zahn G-3 open cup viscometer of the type commonly used in the paint industry. The paint was applied to the surface of the "Luvitherm" sheet with a corrugated ruler of 120 lines (47 lines per centimeter) at room temperature, the coating containing on the order of 0.2 to 0.4 milligrams of solid material per square centimeter . The coated film was then dried for 10 seconds in a circulating air oven maintained at 100 ° C, this brief exposure to heat serving to drive off the methyl ethyl ketone solution after it had served to encourage the paint to adhere to the film ,

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aThe before it had a detrimental effect on the film itself.

The coated film was next treated by applying to the opposite surface a blue vinyl paint was applied which was essentially the same as the paint on the back surface was attached 'except that the pigment used was copper phthalocyanine and that the viscosity 15 seconds in the measurement as described in the previous paragraph * The color was made with a 200-line pyraiaider pattern fluted orphan attached (79 lines per Centimeter), after which the withdrawn leaf, as before, was dried.

When viewed from each side, the coated film had a smooth, pearlescent, black appearance. Was in sharp bending back on itself, the film opazifizierte along the bend line in the usual manner, whereby the transmission or the passage of ink through the sheet in the Hähe aer fold was prevented, so iienn the fold line of the black coated side viewed, she appeared indistinguishable from the rest of the tape,

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but when looking from the blue-coated side it appeared blue against a black background, Although this double-coated film is generally considered to be an intermediate product, it was used for the Embossing suitable to produce blue information on a black background, with the embossed film then attached to a surface which is inserted into a plastic name plate, etc.

A heptane solution was applied to the black coated surface of the coated film just described from a 95.5: 4.5 isooctyl acrylate: acrylic acid copolymer pressure-sensitive adhesive from the Type described in U.S. Patent 2,884,126. (There can be a great variety of normal tacky and pressure-sensitive adhesives can be used, but acrylate adhesives give this class high holding force, solvent resistance, // thermal resistance and aging resistance). The solvent was then evaporated, leaving 5 to 6 milligrams of adhesive solids per square centimeter left behind and the Adhesive was protected by applying a 0.1 mm thick polyethylene film covering. That finished-

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The bank product presented was for use in a Embossing machine for the production of labels split to the desired width, i; ie frciitfläoiie of the tape did not show any of the imperfect and irregular effects typical of the usual Embossable tape products even when viewed in oblique light. When embossed, showed the finished tape has blue indications against an evenly pearlescent black background,

The "Luvitherni" film used in the previous example is an oriented, rigid polyvinyl chloride ("Vinoflex 377" -Hars, sold by the Badische Anilin und Soda Fabrik, which contains certain processing aids and small particles of incompatible material). The film contains about 2 - 3 ° f a soap used in the Emulsionspclymerisierung of polyvinyl chloride, $ 0.15> diphenylthiourea and 0,2 - 0,3 # JJapCC ^ to increase the heat stability and about 5 # "E-sYachs" (a hard, crumbly, crystalline waxy ester from montanic acid, which has a melting point of 79 - 82 ° C, which serves as a lubricant during the calendering of the film).

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Manufacturing processes are described in De Bell ά Richardson, German Plastics Process Department of Commerce, 1946, oeite 399 ff. Equivalent rigid polyvinyl chloride films are sold under the brands: "Polytherm", "Genotherm", "Nicotherm" and "Craythena". The fact that translucent rigid polyvinyl chloride films become opaque when embossed has been known for over 20 years; see Krannich, Kunststoffe im technical corrosion protection , JF Lehmanns Verlag, Munich - Berlin 1943, pages 347-352.

Other compositions that contribute to the formation of translucent Slides that are usually clear, hazy, or iridescent but that are embossed are useful Opacifying or becoming opaque include blends of isostatic polypropylene and butyl rubber one, and polystyrene-polybutadiene mixtures. Rubber-resin compounds similar to those used in normally tacky and pressure sensitive adhesives also the light transmission feature before and the opacity after stretching; although not general self-supporting, such compositions can be coated on foils whose clarity by stretching or Elongation is not affected. Each of these and

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other alternative film structures can be used in the practice of the invention. Ls noticed that each of the compositions mentioned, finely dispersed Including incompatible substances and it will assumed that stretching or stretching the formation too small pores in the areas immediately uiii, border on the inclusions and that these Pores or voids the opacity or opacity by changing the overall diffraction of the film causes.

-The amount of paint applied to each face of the film can be varied, but if excessive length is applied to the top surface of the film, the transparency effect is reduced and the lower Color does not show through. If that is the case, the embossed information naturally does not have the desired information Contrast with the background. ', Venn the Kinter color is black, the upper color can be any other color; the general overall appearance turns black but embossed letters will be the color of the major color. Especially when colors other than black are used, the exact color effect can be changed by changing the amount of color that is on

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the rear surface, the front surface, or both is attached. For example, a tape has a Magenta front coat and a yellow back coat have a generally orange color appearance. When embossed, the letters appear in kage red against an orange background. In the same way, if the Front or top coat is yellow and the back coat is magenta, a slightly lighter natural look achieved. Embossed letters appear yellow in this case. jjie omission of the adhesive layer enables ^ To use foils that are yellow on one side and magenta on the other, to produce labels with either yellow or magenta embossed information against an orange background to have. In certain cases the back and front covers of the same color can be used. In in such cases, embossed information appears relatively pale against a deeply colored background.

Although the use of vinyl paints to give color is simple, effective, versatile and therefore is preferred, it will be appreciated that other coatings or coverings and coloring techniques are needed can be. A metal foil can be used as an explanation

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or patterned layer (e.g. wood fiber) on the back be glued to the plastic film, or the rear surface of the film can be evaporated with aluminum, uold or any other suitable metal plated If desired, the adhesive itself can be colored, thereby avoiding the need for a separate layer of color. It can also be seen that, if only the excess in the band structure is colored and all other layers are clear, the color of the The substrate to which the tape will be attached will mix with the color of the top coat, embossed Angaoen alone show the color of the Gberübersuges. In similar. '/ iron, although a little more expensive than simple ones Coverings or linings can be extremely thin, flexible, transparent, colored films made of vinyl chloride: Vinyllidene chloride copolymers or similar materials laminated or rolled to the top surface of the structure will. The invention also intends the use of white opacifying foils which are internally are colored or pigmented, thereby avoiding the need for a colored back or back cover is, / ie in the previous explanations of the invention, the product has an original appearance,

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which is an additive mixture of the foil color and the top coating color is. When embossed, the background remains the same color, while the embossed information Assume a color that is an additive mixture of the top coat and the now white or pastel-colored Slide is. In any event, the topcoat must be transparent or at least have a high degree of light transmission have to achieve the desired effect. It is also important that the top plating is sufficiently adhesive, pliable and expandable that it does not fall off, flake off during embossing or tear.

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Claims (8)

Claims 1. Colored embossable ligament structure with a colored one Foil underlay of the type which becomes opaque, white or pastel colored when exercising a mild cold drawing effect, characterized in that a first film or layer over one surface of the backing (11) (12) adhered and that on the opposite surface a second film or a second ochicht (13) is adhered, which is transparent and in color from the structure in the presence of this second Film or the layer differs. 2. Product according to claim 1, characterized in that the film support (11) is a solid or rigid Is polyvinyl chloride. 3. Product according to claim 1 or 2, characterized in that that the first film or layer is colored. 4. Product according to claim 1 or 2, characterized in that that each of the films or layers (12,13) is colored. 5. Product according to claim 4, characterized in that the films or layers (12,13) of different Colors are. - 16 009814/1853 BATH 6. Product according to one of the preceding claims, characterized in that the first film or layer (12) comprises a normally tacky and pressure sensitive adhesive which, if desired, penetrates removable clothing is protected. 7. Product according to claim 6, characterized in that a decorative layer between the base (11) and the pressure-sensitive adhesive is incorporated. 8. Product according to one of the preceding claims, characterized in that there is a transparent vinyl paint on one of the films. 00981 W1853