IT202100017132A1 - PRODUCTION METHOD AND FORMING UNIT OF A COMPOSITE TAPE - Google Patents

Description

DESCRIPTION

of the industrial invention entitled:

?PRODUCTION METHOD AND UNIT? OF FORMING A TAPE

COMPOSITE?

The present invention relates to a production method and a unit? forming apparatus for making a composite web for use in making sanitary absorbent articles and a sanitary napkin comprising such a composite web.

Absorbent sanitary articles generally comprise, schematically, a topsheet, a backsheet and an absorbent core disposed between the topsheet and the backsheet. The topsheet is generally the layer of the article in contact with the user while the backsheet is the layer of the article in contact with the user. the outer layer.

Absorbent articles are known, such as the one shown, for example, in document WO2016040091A1, which comprise a topsheet comprising a so-called three-dimensional bubble-shaped layer, obtained by deforming a web with embossing techniques; the bubble shape allows to improve the comfort for the user of the absorbent article.

To make sure that the tape subjected to embossing maintains the desired conformation, the topsheet generally also comprises a second layer or base layer joined to the embossed tape.

Disadvantageously, the production of tapes for hygienic articles which provide for the presence of a topsheet comprising a continuous three-dimensional layer applied to a base layer which is also continuous involves a high use of material and high production costs. ? having felt the need to make tapes for hygienic items that are more? economic guaranteeing comfort for the user.

Purpose of the present invention ? therefore satisfy the aforementioned need.

At least the specified purpose ? achieved by a method of production and a?unit? forming according to the independent claims.

The dependent claims correspond to possible different embodiments of the invention.

According to one aspect, the disclosure relates to a composite tape, in particular a composite tape to be used in the production of absorbent hygiene articles such as diapers and the like.

In one aspect, the composite web comprises a first continuous web, which serves as a backing or matrix.

In one aspect, the composite tape comprises at least one printed length. Preferably the printed piece? obtained from a second continuous strip. According to one aspect, the molded length has at least one protrusion or protuberance and a base portion which at least partially delimits the protrusion itself.

According to one aspect, the printed piece ? joined to the first continuous web via the base portion.

According to one aspect, the first continuous strip and the printed piece delimit at least one cavity at the ledge.

According to one aspect, the basic portion ? outside the ledge itself.

According to one aspect, the composite tape, in particular a length thereof when used in a sanitary article, provides that the protrusions are in contact with the user; and the first tape is in contact with the absorbent core.

In other words, the protrusion protrudes with respect to the base portion towards the user, this allows to increase the comfort of the absorbent article which can embed composite tape.

In one aspect, the printed portion comprises a multiplicity of of protrusions that are bounded by a multiplicity? of basic portions.

According to one aspect, the first continuous strip and the printed piece delimit a multiplicity of of cavities? at the protrusions.

According to one aspect, the multiplicity of protrusions defines a pattern in the printed area.

In other words, the multiplicity of protrusions defines a pattern in the printed piece. In one example, the protrusion can? have a bubble shape.

In another example, the protrusion can? have a wave shape.

Further examples of conformation that the ledge can? assume are: circular, diamond, oval, teardrop, elliptical, heart, triangle.

Advantageously, the protrusions improve the comfort for the user in contact with them.

In one aspect, the composite tape comprises a multiplicity of of printed pieces joined to the first continuous web.

Advantageously, joining the first continuous strip to the printed sections allows blocking the deformation imparted (ie the print) to the printed section at least in correspondence with the protrusion.

Advantageously, using printed sections joined to the first continuous tape, which keeps them shaped, allows to reduce the amount of material used to make a comfortable topsheet.

In particular, using printed pieces instead of a fully printed continuous ribbon allows to reduce the amount of material used.

Advantageously, reducing the quantity of material used allows to lower production costs.

According to one aspect, the printed piece ? printed with embossing techniques.

For example, can you cutting and spacing a continuous tape (with known slip and cut techniques) so as to obtain lengths of tape which can then be printed by passing the lengths between two rollers provided with male-female portions obtaining printed lengths.

For example, can you print a continuous tape obtaining an embossed tape, then the continuous tape can? be cut and spaced (for example with known slip and cut techniques) in order to obtain pieces of the first printed tape.

In one aspect, the printed length comprises non-woven fabric material.

In one aspect, the first continuous web comprises nonwoven fabric material. By non-woven fabric we mean a material whose fibers are randomly oriented. The first web and/or the printed piece can comprise various materials such as, for example: carded fibers, synthetic non-woven fabrics, cellulose fibers, viscose, polyester, cotton, polyamide and microfiber.

In one aspect, the composite tape comprises at least one weld. Advantageously, the welding allows to join the base portion of the molded piece and the first continuous strip.

For example, welding can take place by thermal welding or thermomechanical welding or ultrasonic welding.

In one aspect, the composite tape comprises at least one adhesive layer disposed between the base portion of the printed length and the first continuous tape.

Advantageously, the adhesive layer allows the base portion of the printed piece to be joined to the first continuous tape.

According to one aspect, the disclosure relates to an absorbent article schematically comprising: a topsheet, an impermeable backsheet and an absorbent core disposed between the topsheet and the backsheet.

In one aspect, the topsheet comprises a length of a composite web in accordance with one or more? of the aforementioned aspects.

In one aspect, the first continuous tape ? disposed between the molded length and the absorbent core.

According to one aspect, pu? there is an ADL (Acquisition and Distribution Layer) arranged between the first continuous belt and the absorbent core.

Advantageously, the presence of an ADL makes it possible to improve the movement of the liquids which pass through the topsheet to be collected in the absorbent core.

For example, ? possible to conform the printed piece to obtain a so-called ?Bubble Topsheet?, cio? a bubble-shaped topsheet to increase user comfort. Advantageously, making an absorbent article whose topsheet is ? in accordance with one or more of the aforementioned aspects, allows to reduce the material used in the production of the absorbent article.

Advantageously, reducing the material required to produce the article makes it possible to reduce production costs.

According to one aspect, the first continuous tape used for the topsheet joined to the base portion of the printed segment ensures that the segment itself is kept shaped as desired.

Advantageously, ensuring that the molded piece maintains the shaped protrusions increases the comfort of the user who, in using the hygienic article, will be in contact with the protrusions.

The subject of the description is a production method of composite tapes (in particular for making sanitary absorbent articles) in accordance with one or more? of the aforementioned aspects.

According to one aspect, the method comprises a step of advancing a first continuous web. According to one aspect, the method comprises a step of advancing at least one printed portion of a second continuous web.

According to one aspect, the molded length has at least one protrusion delimited at least in part by a base portion.

According to one aspect, the method comprises a step of joining the printed piece to the first continuous web at the base portion to delimit at least one cavity; between the first continuous web and the piece printed at the protrusion.

Advantageously, joining the first continuous strip to the base portion of the molded length allows to ensure that the protrusion itself is maintained.

According to one aspect, the method comprises a step of printing a length of a second continuous web to obtain the printed length.

Advantageously, printing the portion makes it possible to create protrusions which improve comfort for the user who uses the final product comprising the portion of printed tape.

According to one aspect, the printing step takes place with embossing techniques.

For example, the press can schematically envisage the use of a first roller peripherally equipped with a plurality? of suction seats and a second roller peripherally equipped with a plurality? of teeth with a shape complementary to that of the suction seats.

According to one aspect, the method comprises a step of advancing the second continuous web, to cut and space it so as to obtain a length of second continuous web.

According to one aspect, the cutting step and the spacing step to obtain portions of the second strip take place, for example, with the slip and cut technique.

According to one aspect, the step of joining the printed length to the first continuous web comprises a step of welding the printed length to the first continuous web at least at said base portion.

The welding can be, for example, a thermal, thermomechanical or ultrasonic welding. According to one aspect, the step of joining said printed length to the first continuous web comprises a step of disposing at least one layer of adhesive between said printed length and the first continuous web.

According to one aspect, the step of joining the printed length to the first continuous web comprises a step of joining a discrete succession of printed lengths to the first continuous web.

Advantageously, joining the printed sections to the first continuous ribbon allows the 3D pattern, defined by the protrusions, present on the sections themselves, to be blocked and maintained.

Advantageously, keeping the 3D motif printed on the printed sections guarantees greater comfort for the user who, while using the absorbent product as well as realized, will be in contact with the protrusions.

Advantageously, joining printed pieces instead of a continuous printed ribbon allows to reduce the quantity? of material used during the production of the hygiene article.

Advantageously, using a smaller quantity of material allows to reduce production costs.

Is the object of the description a? unit? forming to make composite tapes in accordance with one or more? of the aforementioned aspects.

According to one aspect, the unit? form comprises an applicator device configured to join a molded length to a first continuous web.

In one aspect, the molded blank has a pattern comprising at least one protrusion and a base portion.

According to one aspect, the unit? of forming comprises a device for producing the molded piece.

According to one aspect, the production device comprises a printing device for printing the pattern on the blank itself and a second continuous web cutting and spacing device for making at least one blank or a plurality of strips. of segments of second continuous tape.

For example, the printing device can? be arranged downstream of the cutting and spacing device according to an advance direction of the second continuous web so as to print the pattern on the portion or portions of the plurality? of clips.

In one example, the printing device can be arranged upstream of the cutting and spacing device according to a direction of advance of the second continuous web to print the pattern on the second continuous web.

The printing device? such as an embossing device.

According to one aspect, the printing device comprises a first drum and a second drum relatively positioned to define a passage slot for the length of second ribbon or for the second ribbon.

Advantageously, the printing device allows to create the three-dimensional motif, given by the protrusions, in the printed piece, increasing the comfort for the user who will be? in contact with the printed piece while using the hygiene article.

According to one aspect, the second web lengths or the second web are printed by conveying them through the drums of the printing device.

In one aspect, the drums of the printing device have parallel axes.

According to one aspect, the first drum ? rotating around a respective axis, for example counterclockwise, and the second drum ? rotating around a respective axis, for example clockwise (and vice versa).

In one aspect, the applicator device ? arranged downstream of the production device according to an advance direction of the molded piece.

In one aspect, the applicator device ? configured to join the printed piece to the first continuous web at the base portion.

In one aspect, the cutting and spacing device comprises an anvil and a rotating knife cooperating with the anvil.

In one aspect, the cutting and spacing device, particularly the anvil, is configured to space out the second tape segments.

In one aspect, the pieces are cut and spaced, for example with a slip and cut technique on the anvil itself.

According to one aspect, the spaced sections continue in their forward direction and pass through the slot of the printing device so as to obtain printed sections of second ribbon.

According to one aspect, the applicator device comprises at least one applicator drum tangential to the first drum or to the second drum.

According to one aspect, the applicator device comprises a welder for welding said printed length to the first continuous web with thermal or thermo-mechanical welding.

For example, welding of the ultrasound type.

According to one aspect, the applicator device comprises an adhesive dispenser, said dispenser being arranged downstream of the production device in the direction of advancement of the molded piece.

Advantageously, the applicator device makes it possible to maintain the shape that the printing device has imprinted on the printed piece.

According to one aspect, the first drum and the second drum of the printing device respectively have male portions and female portions, complementary to each other, shaped to print the 3D pattern (defined by the protrusions) in the printed portion when the ribbon passes through the slit passing.

Depending on the conformation with which the protrusions are intended to be formed, the male portions and the respective female portions will have corresponding shapes.

The main characteristics of the invention will become more evident in the detailed description which follows, made with reference to the attached drawings, which represent a purely exemplifying and non-limiting embodiment thereof, in which: - figure 1 illustrates a detail of a composite tape in accord with the description in a schematic sectional view;

figure 2 illustrates a detail of a composite tape in accordance with the description in a schematic perspective view;

figure 3 illustrates a detail of a composite tape in accordance with the description in a schematic perspective view;

figure 4 illustrates an absorbent article according to the description in a schematic plan view;

- figure 5 illustrates a unit? of forming a composite tape according to the description in a schematic front view;

- figure 6 illustrates a detail of a unit? of forming a composite tape according to the description in a schematic view.

- figure 7 illustrates a detail of a unit? of forming a composite tape according to the description in a schematic view.

Fig. 8 illustrates an absorbent article according to the description in a schematic sectional view.

With reference to the accompanying drawings and with particular reference to figure 1, ? indicated by the numeral 1 a composite tape in accordance with the description.

Composite tape 1 ? preferably intended for the production of sanitary absorbent articles such as diapers, an example of which, indicated with reference number 200, is illustrated in figure 4. Composite tape 1, how will it be? better clarified below, it allows you to create so-called 3D or three-dimensional topsheets for diapers.

The composite tape 1 comprises a first continuous tape 11 and a printed piece 12S, i.e. a piece in which ? an M pattern has been embossed.

The 12S piece printed ? obtained starting from a length 12L of a second continuous strip 12. The length 12S has a first face 12A and a second face 12B.

Schematically, the molded length 12S has at least one protrusion 4 delimited, at least in part, by a base portion 5 external to the protrusion 4.

The protrusion 4 protrudes from the first face 12A with respect to the base portion 5.

With reference to the enclosed figures, the section of the composite tape 1 is been shown on a greatly enlarged scale to facilitate understanding of the present description.

The 12S printed piece defines the so-called 3D part of the topsheet, created to improve the comfort of the diaper thanks to the presence of protrusions 4.

The length 12S therefore defines a molded portion 3 for the composite tape 1.

The first continuous tape 11 has a first face 11A and a second face 11B.

The first face 11A ? joined to the second face 12B of the segment 12S through the base portions 5.

The second face 11B is preferably in contact with the absorbent core 203 of the absorbent hygiene product 200 or with a possible layer of ADL.

Does the composite tape 1 have at least one cavity? 7, which is delimited by the printed portion 12S and by the first ribbon 11 in correspondence with the protrusions 4.

In other words, the cavity 7 ? delimited by the second face 12B of the length 12S at the protrusion 4 and by the first face 11A of the first continuous band 11. In one embodiment, the length 12S has a multiplicity of of protrusions 4 on the first face 12A delimited respectively by a multiplicity? of base portions 5 surrounding the protrusions 4.

In this embodiment, the composite tape 1 has a multiplicity of of cavities? 7 delimited by the segment 12S and by the first continuous band 11 (in correspondence with the multiplicity of protrusions 4).

The multiplicity of protrusions 4 defines the reason M, or a pattern that will constitute? the three-dimensional portion of the topsheet.

The user, in using an absorbent hygienic product 200 which comprises the composite tape 1, is in contact with the protrusions present on the first face 12A of the segment 12S.

Advantageously, the protrusions 4 improve comfort for the user who uses the product and comes into contact with them.

In one embodiment, the printed slug 12S comprises nonwoven fabric material.

In one embodiment, the molded slug 12S comprises polymer fibers.

In one embodiment, the first continuous web 11 comprises non-woven fabric material.

In one embodiment, the first web 11 is continuous? a liquid acquisition and distribution layer (ADL).

The shape given to the length 12S by molding is maintained by gluing the length 12S to the first continuous strip 11.

In one embodiment, the composite tape 1 comprises a discrete succession of lengths 12S joined to the first tape 11.

The composite tape 1 has a succession of molded portions 3 (in correspondence with the segments 12S) maintained in the desired shape by the first continuous tape 11.

In an absorbent article 200 which uses a length of web 1 as a topsheet, this length will present? a molded portion 3, in favor of the comfort of the user, in correspondence with the molded portion 12S.

In one embodiment, the protrusions 4 of the section 12S have a bubble shape, illustrated for example in figure 3.

In one embodiment, the protrusions 4 of the segment 12S have a wave shape illustrated, for example, in figure 2.

In one embodiment, the waves printed on the segment 12S comprise waves with the crests 4A parallel to the prevailing development direction of the segment 12S itself.

In one embodiment, the waves printed on the segment 12S comprise waves with the crests 4A transverse to the prevailing direction of development of the segment 12S itself.

The protrusions 4 can assume different shapes, for example diamond, heart, oval, teardrop, elliptical, clover-shaped and others.

The lengths 12S and the first tape 11 are joined, for example, by means of a weld 9, indicated in figure 1, and/or at least one layer of adhesive 8 illustrated in figure 2.

In one embodiment, the lengths 12S and the tape 11 are joined by welding, in particular heat-sealing.

In one embodiment, the lengths 12S and the tape 11 are joined by ultrasonic welding.

The adhesive layer 8 ? arranged between the length 12S and the continuous band 11, preferably between the base portions 5 which delimit the protrusions 4 and the band 11.

The subject of the description is an absorbent article illustrated for example in figure 4 and indicated with the reference number 200.

The absorbent article 200, described limited to the parts necessary for the understanding of the present invention, schematically comprises: a topsheet 201, an impermeable backsheet 202 and an absorbent core 203 disposed between the topsheet 201 and the backsheet 202. The topsheet 201 is the part of article 200 which, in use, is in contact with the user. The topsheet 201 comprises a portion of a composite tape 1 according to one or more of the aforementioned characteristics.

The composite tape 1 is cut to make a piece of composite tape to be assembled in article 200.

The piece of composite tape comprises at least one printed piece 12S and one piece 11S of the first continuous tape 11.

In one embodiment, the molded slug 12S has a shorter length than the slug 11S.

In one embodiment, the molded slug 12S has a smaller width than the slug 11S.

As shown for example in figure 8, the segment 11S, included in the composite tape 1, is arranged between the molded piece 12S (also included in the composite tape 1) and the absorbent core 203.

In one embodiment, not shown, the absorbent article 200 comprises an ADL (i.e. a liquid acquisition and distribution layer) disposed between the segment 11S and the absorbent core 203. Preferably the ADL is ? discreet and arranged in correspondence with the printed 12S segment.

Advantageously, the presence of an ADL allows the liquids to be acquired and directed towards an absorbent core, increasing the efficiency of the absorbent hygienic product 200.

The subject of the description is a production method of a composite tape 1. The composite tape 1 ? preferably intended for the production of sanitary absorbent articles such as, for example, article 200.

The method schematically includes the following steps:

- advance a first continuous tape 11,

- advancing at least one printed portion 12S of a second continuous ribbon 12, in which portion 12S has at least one protrusion 4 delimited at least in part by a base portion 5

- join the length 12S to the first strip 11 in correspondence with the base portion 5 to delimit at least one cavity? 7 between the tape 11 and the length 12S at the protrusion 4.

In one embodiment, the method comprises a step of printing a length 12L of second continuous tape 12 to obtain the printed length 12S.

Preferably, the method, in particular the step of printing, comprises a step of embossing the length 2L, i.e. emboss or print a 3D pattern on it.

The technique with which the piece is printed? commonly known as embossing.

For example, the phase of printing pu? envisage, schematically, the use of a first roller peripherally equipped with a plurality? of suction seats and a second roller peripherally equipped with a plurality? of teeth with a shape complementary to that of the suction seats.

In one embodiment, the method comprises the step of advancing the second continuous tape 12.

In one embodiment, the method comprises the step of cutting and spacing the second tape 12 to obtain lengths 12L of second tape 12.

The lengths 12L are subsequently molded so as to obtain lengths 12S having protrusions 4 delimited by base portions 5.

For the phase of cut and space, for example, ? possible to use a technique of slip and cut, that is? a cutting and sliding technique in order to cut (discrete) lengths of tape and then space them.

In one embodiment, the step of joining at least one printed length 12S to the first continuous ribbon 11 comprises a step of welding the lengths 12S to the ribbon 11 at the base portion 5.

In one embodiment, the step of welding the lengths 12S to the tape 11 takes place by ultrasonic welding or thermomechanical welding.

In one embodiment, the step of joining the lengths 12S to the continuous tape 11 comprises a step of placing a layer of adhesive 8 between the lengths 12S and the tape 11.

The joining of the lengths 12S to the tape 11 allows the 3D pattern which is to be blocked and maintained. been imprinted, through the molding, in the piece 12S.

In one embodiment, a succession of suitably sized and spaced lengths 12S are applied to the strip 11.

In one embodiment, the step of joining the length 12S to the strip 11 comprises a step of joining a discrete succession of lengths 12S to the first continuous strip 11.

The first continuous 11 tape ? joined at the base portions 5 of the molded segment 12S, in particular ? joined on the opposite side with respect to the protrusions 4 defining the molded portion 3 for the composite tape 1.

In one embodiment, the method comprises the steps of printing the continuous web 12, cutting and spacing the continuous web 12 to obtain lengths 12S.

Is the object of the description a? unit? 100 for forming composite tapes, for example of the type of composite tape 1.

The unit 100 schematically includes a production device 101 and an applicator device 110.

The applicator device 110 ? configured to join a printed piece 12S, which has a pattern M comprising at least one protrusion 4 and a base portion 5, to a first continuous ribbon 11.

The device 101 for producing the blank 12S comprises a printing device 102 for printing the pattern M and a device 103 for cutting and spacing a second continuous web 12 for making at least one blank or a plurality of of lengths 12L of said second continuous strip 12.

Device 102 ? of a type known in the sector and ? also referred to as an embossing device. In one embodiment, the device 102 is arranged downstream of the device 103 according to an advancement direction V12 of the second ribbon 12 so as to print the motif M on the portion 12L.

In an embodiment not shown, the device 102 is arranged upstream of the device 103 according to the feed direction V12 to print the motif M on the tape 12. In this way, the segments 12S are cut and spaced down printed.

The device 102 comprises a first drum 104 and a second drum 105 relatively positioned to define a slot 106 for the passage of the piece 12L or for the tape 12.

In the example illustrated in figure 5, the first drum 104 is rotatable around an axis a4 in a clockwise direction, while the second drum 105 is rotatable about an axis a5, parallel to a4, counterclockwise. For simplicity, drums 104 and 105 are considered substantially tangent.

In one embodiment, the first drum 104 and the second drum 105 respectively have male portions and female portions, complementary to each other, shaped to print the motif M (given by the protrusions 4).

The male - female portions present on the drums 104 and 105 allow the protrusions 4 of the section 12S to be formed.

Depending on the conformation with which the protrusion 4 is intended to be formed, the male portions and the respective female portions will have different shapes.

In one embodiment, the slug 12S is then molded by conveying it between drums 104, 105.

Figure 6 shows, for example , the drums 104 and 105 shaped so as to impress wavy protrusions 4.

In one embodiment, drum 104 is molded and drum 105 serves as an anvil. The segment 12L advances and passes through the slot 106 so that the outer surfaces of the drums 104, 105 cooperate by engaging the segment 12L to impress the same with the 3D motif.

The 110 device? configured to join the length 12S to the tape 11 at the base portion 5.

In one embodiment, the device 110 is arranged downstream of the production device 101 according to an advance direction of the molded piece V12S.

In one embodiment, as illustrated in the example of figure 5, the device 103 comprises an anvil 107, preferably in the form of a drum rotating around an axis a7 in a clockwise direction, and a rotating knife 108, rotating around an axis a8 counterclockwise, and cooperating with the anvil 107.

The knife 108 cuts the continuous strip 12, forming the pieces which are suitably spaced, for example on the anvil 107 itself with a slip and cut technique known and not further described.

In one embodiment, the device 103, and in particular said anvil 107, is configured to space 12L slugs.

The device 110 comprises at least one applicator drum 111 tangent to said first drum 104 or to said second drum 105.

The 111 applicator drum ? rotating around an axis a11 in a clockwise direction in the example shown in figure 5 and ? arranged downstream of the drum 105 according to the forward direction V12S.

In one embodiment, the drum 111 is tangent to the drum 105 and allows to carry out the step of joining the sections 12S with the strip 11, i.e. joining the strip 11 to the base portions 5 of the sections 12S as schematized in figure 7.

In one embodiment, the device 110 comprises a welder 112 for welding said printed portion 12S to the first continuous tape 11.

In one embodiment, the drum 112 and the drum 105 are configured to weld the lengths 12S onto the first belt 11.

In one embodiment, the device 110 comprises an adhesive dispenser 113 arranged downstream of the production device 101 according to said advancement direction V12S of the molded piece. The dispenser 113 dispenses at least one layer of adhesive 8 so that the lengths 12S can be joined to the continuous tape 11 by means of the adhesive. For example, the dispenser 113 dispenses the adhesive onto the tape 11 and/or onto the lengths 12S.

Claims (13)

1. Method of producing a composite tape (1), in particular for making sanitary absorbent articles, comprising the steps of: - advance a first continuous tape (11), - advancing at least one printed piece (12S) of a second continuous ribbon (12), said piece (12S) printed having at least one protrusion (4) delimited at least in part by a base portion (5), - join said printed piece (12S) to the first continuous ribbon (11) in correspondence with the base portion (5) to delimit at least one cavity? (7) between said first continuous strip (11) and said piece (12S) printed in correspondence with said protrusion (4). 2. Production method according to claim 1, comprising a step of printing a length (12L) of said second continuous tape (12) to obtain said printed length (12S). 3. Production method according to claim 2, comprising the steps of: - advancing said second continuous belt (12), - cutting and spacing said second continuous strip (12) to obtain said portion (12L) of second continuous strip. 4. Production method according to any one of the preceding claims, wherein the step of joining said printed length (12S) to the first continuous ribbon (11) comprises a step of welding said printed length (12S) to the first continuous ribbon (11) at least at said base portion (5). 5. Production method according to the preceding claims, wherein the step of joining said printed length (12S) to the first continuous tape (11) comprises a step of placing a layer of adhesive (8) between said printed length (12S) and the first belt (11) continuous. 6. Production method according to the preceding claims, wherein said step of joining said printed length (12S) to the first continuous web (11) comprises a step of joining a discrete succession of printed lengths (12S) to said first web (11) continuous. 7.Unit? forming (100) to make a composite tape (1), said unit? forming (100) including: - an applicator device (110) configured to join a printed length (12S) having a pattern (M) comprising at least one protrusion (4) and a base portion (5) to a first continuous web (11); - a production device (101) of said printed piece (12S), said production device (101) comprising a printing device (102) for printing said pattern (M) and a cutting and spacing device (103) of a second continuous tape (12) to form at least one piece (12L) or a plurality of of lengths (12L) of said second continuous ribbon (12), in which said printing device (102) ? arranged downstream of said cutting and spacing device (103) according to an advancement direction (V12) of the second continuous ribbon (12) to print said motif (M) on said length (12L) or in which said printing device ? arranged upstream of said cutting and spacing device (103) according to an advance direction of the second continuous ribbon (12) to print said motif (M) on said second continuous ribbon (12), said printing device (103) comprising a first drum (104) and a second drum (105) relatively positioned to define a passage slot (106) for said second ribbon portion (12L) or for said second ribbon (12); said applicator device (110) being configured to join said printed piece (12S) to said first continuous web (11) at said base portion (5), said applicator device (110) being arranged downstream of the device (101) of production according to an advance direction (V12S) of the printed piece. 8.Unit? forming according to claim 7, wherein said cutting and spacing device (103) comprises an anvil (107) and a rotating knife (108) cooperating with said anvil (107). 9.Unit? forming device according to claim 7 or 8 wherein said cutting and spacing device (103), in particular said anvil (107), is configured to space out said segments (12L) of second tape (12). 10.Unit? molds according to any claim from 7 to 9, wherein said applicator device (110) comprises at least one applicator drum (111) tangent to said first drum (104) or to said second drum (105). 11.Unit? forming device according to any claim from 7 to 10, wherein said applicator device (110) comprises a welder (112) to weld said printed portion (12S) to the first continuous web (11). 12.Unit? according to any claim from 7 to 11, wherein said applicator device (110) comprises an adhesive dispenser (113), said adhesive dispenser (113) being arranged downstream of the production device (101) according to said direction of advancement (V12S) of the printed piece. 13.Unit? according to any one of claims 7 to 12, wherein the first drum (104) and the second drum (105) respectively have male portions and female portions, said male portions and said female portions being complementary to each other and being shaped to print the pattern (M) of the printed piece (12S).