FR2844220A1 - PROCESS FOR ADDING A LABEL HAVING A NON-ADHERENT COMPONENT ON A SUBSTRATE AS WELL AS A SUBSTRATE OBTAINED BY IMPLEMENTING THIS PROCESS - Google Patents

Abstract

Method for affixing a decorative label comprising at least one independent non-adhering flap on a plastic substrate, during the manufacture of this substrate by injection, characterized by the following steps: - printing is carried out on at least one side d '' a support film; - the support film thus printed is cut so as to obtain a decorative label comprising a main part and at least one independent flap; - the independent flap is folded against a first face of the main part of the decorative label - the first side of the decorative label is applied alone to which the folded flap is applied against the internal wall of the substrate injection mold; - the substrate is injected; and unmolding the decorated substrate.

Description

The present invention relates to a method for affixing a

  decorative label comprising at least one independent non-adhering flap on a plastic substrate, during the

  manufacture of this substrate by injection.

  In many fields of the art, it is desirable to apply printed decorations to plastic substrates. Specialists currently have for this purpose the IML (In-Mold Labeling) decoration process or labeling in the mold by which a label is introduced, in a mold before carrying out the

substrate molding.

  This molding can be carried out by any conventional known process (injection, blow-molding injection, blow-molding extrusion,

continuous for thermoforming ...).

  In what follows, the term injection will be used arbitrarily to designate all these processes.

  The label is generally a decorative label carrying a monochrome or polychrome printing, in particular produced

  in screen printing and / or rotogravure and / or flexography and / or offset.

  During the implementation of the IML process, the label is preferably positioned in the mold using a robot and applied firmly against one of the walls of the latter before injection so as to

  avoid that the injected material can bypass it.

  During the injection, this material is in contact with the face 25 of the label opposite to the mold and adheres to it.

  Consequently, the IML method has the advantage of making it possible, in a single operation, to intimately join a label and a

  substrate by molecular bond, without possibility of separation.

  For this process to be satisfactory, it is of course essential that the materials constituting the label and the substrate are compatible: for example, the label can be made of paper if the material injected is made of polystyrene or can be polypropylene

  if the material injected is polypropylene or polyethylene.

  Substrates fitted with a decorative label affixed by the IML process frequently correspond to covers and / or

  receptacles for packaging products such as foodstuffs, discs, DVDs, or miscellaneous articles.

  However, it may be desirable to equip such packaging with detachable advertising coupons (reduction coupons, purchase orders, promotional offers, coupons for contests, etc.) or detachable or non-detachable marking elements such as anti-theft elements or information support elements.

  However, these various elements must currently be added to the decorative label during an additional step independent of the step of injecting the substrate which is particularly expensive.

  both in time and in labor.

  The object of the present invention is to remedy this drawback by proposing a method for affixing to a plastic substrate a decorative label comprising at least one independent non-adherent flap, this during the manufacture of this substrate by injection.

  According to the invention, this process is characterized by the following steps: printing is carried out in particular in screen printing and / or gravure printing and / or flexography and / or offset on at least one face of a support film made of a material compatible with the substrate ; - The support film thus printed is cut so as to obtain a decorative label comprising a main part and at least one independent component; - The independent shutter is folded against one of the faces or first face of the main part of the decorative label; - The first face of the decorative label is applied alone to which the folded flap is applied against the internal wall of the substrate injection mold; - Injecting the substrate in a conventional manner; and

- the decorated substrate is removed from the mold.

  It should be noted that according to the invention, the step of cutting the support film can be implemented before or after the printing step.

of it.

  During the injection step, the folded shutter is positioned between the main part of the decorative label and the mold so that it is not in direct contact with the injected material.

  Consequently, this flap remains free and does not adhere to the substrate.

  According to the invention, the printing of the support film can be carried out on only one of the faces or on the two faces of the latter.

  In the first case, the support film must be made of a transparent material if part of the decoration is to be read through this film.

  According to a first variant, printing can thus be carried out on the first face of the support film intended to be in contact

with the injection mold.

  According to this variant, after injection of the substrate, the decoration of the label is read directly on its main part but through the material constituting the support film on the independent shutter

folded over it.

  According to a second variant, printing can also be carried out on the second face of the support film intended to be in contact

1 5 with the injected material.

  It is therefore essential that the printing ink or an additional varnish is also compatible with the material constituting the substrate.

  According to this variant, after injection of the substrate 20 the decoration of the label is read through the material of which the film is made

  support and on its main part folded over it.

  This last variant according to which the so-called "cello-enamel" printing is sandwiched between the substrate and the support film at the main part of the label has the advantage of making it possible to protect the decoration against attack. possible.

  As already indicated, according to the invention, printing can also be carried out on each of the two faces of the support film, in which case the latter may be transparent or opaque (white or in color).

  The independent shutter can in particular be printed on each of its two faces.

  It is also possible to print the main part of the decorative label on one of the faces of the support film and

  the impression of the independent component on the other side of this film.

  In certain areas of use, in particular when it corresponds to an advertising coupon, the independent component must be detachable.

  It can thus be cut using a sharp object.

  However, according to a preferred characteristic of the invention, the independent flap is precut at the base of the fold before the step of applying the decorative label against the internal wall of the

substrate injection mold.

  This pre-cutting step can be carried out either during

  the printing step either during the cutting step of the decorative label.

  It is essential that the pre-cut line is located on the folded independent flap and not on the main part of the label so that it cannot be in contact with the material injected during the injection step of the substrate: indeed, otherwise, this line could not fulfill its function of allowing separation

  easy of the independent shutter and the main part of the label.

  This characteristic therefore makes it possible to provide the Korean substrate with a detachable coupon, constituting a promotional means and / or

  communication and / or fun that can be particularly advantageous.

  The invention also relates to a decorated substrate obtained by the implementation of the above-mentioned method.

  According to the invention, this substrate is characterized in that it is

  equipped with a decorative label comprising at least one independent non-adhering flap.

  Such an independent component may or may not be detachable or separable from the decorated substrate.

  This substrate, the decorative label and the independent component can of course have any shape and dimensions without departing from the scope of the invention.

  Likewise, the independent flap can be located on any part of the periphery of the label, or even inside in a window formed in the substrate.

  According to another characteristic of the invention, the independent shutter is provided with an anti-theft marking element such as, for example, a wire or an electrical network such as to trigger a

  alarm, in particular at checkout in a store.

  In view of this characteristic, after payment the independent component must be detached or the anti-theft marking element must be deactivated by the cashier by an appropriate means not accessible to

  consumers for not operating the alarm.

  According to another characteristic of the invention, the independent component can also be provided with an information support element such as a chip similar to those fitted to so-called "smart" cards (bank cards, telephone cards, etc. ) on which, for example 5, is stored information concerning the nature and characteristics

  (shelf life, ...) of food packaged in the substrate.

  According to another characteristic of the invention, the independent shutter is equipped with an adhesive coating.

  The presence of such an adhesive coating can in particular be advantageous when the decorated substrate corresponds to the cover.

  a box or case such as a disc or DVD case.

  If the adhesive coating is constituted by a sufficiently strong glue, the independent flap can be glued to the box body to demonstrate an attempted break-in and therefore act as a burglar-proof element.

  If the adhesive coating is made up of a not very tenacious glue, the independent flap can constitute a closing element of the

  box, reusable several times.

Claims (4)

CLAIMS) Method for affixing a decorative label comprising at least one independent non-adherent flap on a plastic substrate, during the manufacture of this substrate by injection, characterized by the following steps: - printing is carried out in particular in screen printing and / or rotogravure and / or flexography and / or offset on at least one face of a support film made of a material compatible with the substrate; - The support film thus printed is cut so as to obtain a decorative label comprising a main part and at least one independent flap; - The independent shutter is folded against one of the faces or first face of the main part of the decorative label; the first side of the decorative label is applied alone to which the folded flap is applied against the internal wall of the substrate injection mold; the injection of the substrate is carried out in a conventional manner so that the folded shutter positioned between the main part of the decorative label and the mold is not in direct contact with the injected material and does not adhere to the substrate; and - the decorated substrate is removed from the mold. ) Method according to claim 1, characterized in that the support film is made of a transparent material.   3) Method according to claim 2, characterized in that one carries out the printing on the first face of the support film. 4) Method according to claim 2, characterized in that   printing is carried out on the second face of the support film.   50) Method according to claim 1, characterized in that   printing is carried out on each of the two faces of the support film.   ) Method according to any one of claims 1 to 5, characterized in that   the independent flap is precut at the base of the fold.   70) Decorated substrate obtained by implementing the method according to one   any of claims 1 to 6,   characterized in that it is equipped with a decorative label comprising at least one independent non-adhering flap. 10) decorated substrate according to claim 7, characterized in that   the independent flap is fitted with an anti-theft marking element.   9) decorated substrate according to any one of claims 7 and 8, characterized in that   the independent component is provided with an information support element.   ) Decorated substrate according to claim 7, characterized in that   the independent shutter is fitted with an adhesive coating.