DE2524576A1 - HEAT TRANSFERABLE LABEL AND METHOD FOR MANUFACTURING IT - Google Patents

Description

Dipl .-! Ng. Heinz Bardahle

ar45n * hr-. ', 5.TiI. 292353

: cL ..: .int!: - 2y, PO Box 4

Munich, ^Γ 3,

My reference: P 2166

Applicant: Dennison Manufacturing Company 300 Howard Street
Framingham, Mass. 01701 USA

Heat transferable label and process for its manufacture

The invention relates to the labeling (writing or marking) of objects using heat for transferring stickers (lettering) from a carrier to the one to be labeled (to be labeled or objects to be marked.

In the case of labeling by heat transfer, an inscription attached to a carrier by means of a separating layer is used brought into contact with the object to be marked. When heat is applied to the carrier, the release layer melts and thereby it is possible for the writing (label) to adhere to the object.

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With the typical heat transferable label such as this in US Pat. No. 3,616,015, the release layer is a wax coating on the support and at the inscription (the imprint) around a transfer layer, which is printed on the wax coating will. In such a label, the application of heat during the transfer process causes a wax film is deposited over the entire area in which the carrier is to be marked or labeled Object is in contact. The applied film has any configuration and is often much larger than the imprint or the lettering.

Although the wax film is transparent and generally invisible to cursory inspection, the film is visible under certain lighting conditions and can have an unfavorable appearance. The resulting film can be viewed as an enlarged, irregular "halo ¹¹ surrounding the print (the lettering). The irregular halo can not only have an unfavorable appearance but also represents a waste of material Amount of wax material required because the wax has a tendency to penetrate the substrate used in conventional heat transfer labeling (lettering).

The aim of the present invention is therefore the labeling or writing or marking of objects to accelerate and facilitate through heat transfer.

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2574576

Another object of the invention is to improve the appearance of the heat transferred labels. The aim of the invention is there is also the enlarged, irregular ones that often occur during labeling or inscription by heat transfer Avoid halo. The aim of the invention is, finally, that for the separation seal in the labeling or labeling of objects by heat transfer to make the required amount of material economical.

These and similar goals are achieved according to the invention by that a thermoplastic separating layer is used which is contoured according to a prescribed pattern and matches a transmission layer (with this is congruent).

Since the separating layer is contoured, there is no irregular appearance. Also, the contoured pattern can be designed that it is very close to the perimeter of the transfer layer, and thereby the extent of the halo can be reduced considerably.

According to one aspect of the invention, the atrium can thereby it can be completely avoided that the circumference of the transfer layer exceeds that of the release layer.

According to a further aspect of the invention, the release layer is formed by printing instead of coating the carrier upset. This significantly reduces the amount of material required. It also occurs when the release material is a resin rather than a wax, a lesser one

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Absorption by the wearer and less material is required.

By printing the separating layer, it is no longer necessary in connection with the printing process which the transfer layer is applied to the carrier is to perform a coating process.

Further features of the invention emerge from the following description some preferred embodiments of the invention in conjunction with the accompanying drawings. Show:

1A is a top plan view of a heat transferable Label carrier (label carrier) according to the state of the art;

FIG. IB shows a cross-sectional view of the carrier according to FIG. 1A; FIG.

Fig. IC is a perspective view of an article that labeled using the carrier shown in FIG. 1A or has been marked;

2A is a top plan view of a heat transferable label carrier in accordance with the invention;

FIG. 2B shows a cross-sectional view of the carrier according to FIG. 2A; FIG.

FIG. 2C shows a perspective view of an object which is labeled using the carrier according to FIG. 2A 509885/0322

or has been marked (labeled), and

Figure 3 is a top plan view of another heat transferable label according to the invention.

In Figs. 1A to 1C of the accompanying drawings, a Carrier 11 (Fig.IA and IB) according to the prior art with a coating 12 on which a transfer layer 13 is applied, which has an imprint (a lettering).

If the transfer layer 13 of the carrier 11 with the to object to be labeled or written on, for example the container 14 shown in FIG. IC, in contact is brought and heat is applied, the wax coating 12 melts and thereby it is possible that the with of the transfer layer 13 in contact with the part Container 14 adheres. At the same time, a wax film 15 is deposited on the container 14. This film exhibits an irregular Shape and is considerably larger than the transferred print (image pattern) 16. Under certain viewing conditions, the film 15 has an unfavorable appearance.

These disadvantages are eliminated by the heat transfer labeling arrangement of the present invention as shown in FIG. 2A and Figure 2B showing a contoured release liner 22 on the support 21 applied and a transfer layer 23 on the release layer is applied. If now the transfer layer with the object to be labeled or marked, for example the container 24 shown in Fig. 2C, in

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Is brought into contact, the transferred print (image pattern) 25 has an overlying release layer which results in a contoured halo 26 with a narrow edge.

If the narrow atrium 26 is also to be eliminated, this can be achieved by, as shown in FIG. 3, provides the heat transferable label with a contoured release liner 32 that is within the perimeter lines a transfer layer 33. If this label (this Sticker) is applied to an object, the print (the image pattern) of the transfer layer 33 has the the same extent as the boundary lines of the separating layer 32.

The separating layers 22 and 32 are expediently applied to a carrier by printing. Suitable materials for this purpose are resins such as B. polyamides, polystyrenes, rosin derivatives (rosin derivatives), phenol formaldehydes, terpene resins and ketone resins. A suitable material for the transfer layers 23 and 33 is the resin isobutyl methacrylate, which suitably has a low melt viscosity within the range of 3.5 to 8.5 poise at 160.degree. They have expediently a softening point within the range from 95 to 106 ° C.

The invention is illustrated in more detail by the following examples, without, however, being restricted thereto.

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example 1

A polyamide resin sold under the trade name Emerez 1538 by Emery Industries was made into 70 parts Isopropyl alcohol and 30 parts of toluene dissolved to form a solution with a resin concentration of 30%. The resulting solution was then in a contoured pattern on a paper carrier made from a conventional starting material for thermal transfer labeling using printed on a rotogravure press. The printed pattern was dried to remove the solvent and then put on was a transfer layer, consisting of an isobutyl methacrylate color varnish, printed in a contoured pattern so that it was congruent with the separating pattern. That Double-printed carrier material was used to apply the inscription pattern (image pattern) from the colored lacquer to a The article was used and a good transfer was obtained with an insignificant release halo.

Other suitable Emerez-type polyamide resins are sold under the tradenames Emerez 1536 and 1537. Emerez polyamide resins have those in Table I below specified properties:

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Table I. properties Emerez 1536 Emerez 1538 Softening range (C) 95 to 105 98 to 106 Melt viscosity (poise at
160 ° C) 3.5 to 5.0 6.5 to 8.5 melted paint (1963 Gardner) 12th 10 Viscosity in 40% mixed
Solvent (cP at 25 ° C) 66 82 Viscosity in 40% n-propanol
CcP at 25 ° C) 62 95

Example 2

Example 1 was repeated using a

940 polyamide sold under the trade name Versamid / by the General Mills Company. It became a satisfactory separation with an insignificant release halo obtain.

Example 3

Example 1 was repeated using a polyamide resin, sold under the trade name Versamid 948. Here, too, was a satisfactory one Separation achieved.

Example 4

Example 1 was repeated using a polystyrene resin, sold under the trade name Lustrex 3 and using toluene as a solvent. It became a satisfactory breakup with one

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insignificant parting material halo obtained. Example 5

Example 4 was repeated using a rosin derivative (Rosin derivative), as it is sold under the trade name Pentalyn A, with a similar one Result was obtained.

Example 6

Example 4 was repeated using a modified one Phenol-formaldehyde, as sold under the tradename Amberol F-7, with a similar result was achieved.

Example 7

Example 4 was repeated using a terpene resin, sold under the trade name Piccolyte S-IOO, with a similar result.

Example 8

Example 4 was repeated using a ketone resin, sold under the trade name Advaresin CXF and a similar result was obtained.

The invention has been described above with reference to specific Examples explained in more detail, but it goes without saying for a person skilled in the art that they in no way relate to

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is limited, but also includes the equivalents thereof and that the above-described inventive Embodiments can be changed and modified in many ways without affecting the framework the present invention is departed from.

Patent claims:

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Claims (11)

2574576 - li - claims 1. Heat transferable label, identified by a thermoplastic release layer (22,32) which is contoured according to a prescribed pattern, and a contoured transfer layer (23,33) which is congruent with the separating layer (22,32) (lies on top). 2. Heat transferable label, characterized by a printed thermoplastic separating layer (22,32) and a transfer layer (23,33) in contact with the release layer (22,32). 3. Label according to claim 1, characterized in that the separating layer (22,32) opposite the circumference of the transfer layer (23,33) has an edge. 4. Label according to claim 1, characterized in that the transfer layer (23,33) opposite the periphery of the separating layer (22,32) has an edge. 5. Label according to claim 1, characterized in that the separating layer (22, 32) is applied to a carrier (21) and that the transfer layer (23,33) on the release layer (22,32) lies. 6. Label according to claim 1, characterized in that the Transfer layer (23,33) adheres to an object and that the separating layer (22,32) on the transfer layer (23, ^{33) lays} 509885/0322 2574576 7. Label according to claim 1, characterized in that the separating layer (22,32) consists of a resin. 8. Label according to claim 7, characterized in that the resin has a melt viscosity at 160 C within of the range from 3.5 to 8.5 poise. 9. Label according to claim 7, characterized in that the resin has a softening point which is within the range from 95 to 106 ° C. 10. Label according to claim 7, characterized in that the resin is one from the class of polyamide, polystyrene, Rosin derivative, phenol formaldehyde, terpene resin and ketone resin. 11. A method for producing the heat transferable label according to claims 1 to 10, characterized in that one a) the material from which the separating layer is made dissolves in a solvent to form a solution and b) the solution is printed on a carrier. 509885/0322 Blank page