EP0501842B1 - Textile interlining composite - Google Patents

Abstract

The invention relates to the sector of textile reinforcements or interlinings. <??>It relates more specifically to a textile interlining comprising a first nonwoven layer (1) composed of microfibres produced by melt-blowing. <??>According to the invention, it comprises a second nonwoven layer (2) composed of fibres or filaments. The first layer (1) and the second layer (2) are connected by the entanglement of some of their fibres which is obtained by the application of fluid jets. <IMAGE>

Description

The invention relates to a fabric covering according to the preamble of claim 1. Such a textile is known from document EP-A-0 333 211.

The interlining textiles are intended to be associated with other textiles or draperies to which they give a touch, flexibility and nervousness that they do not have by themselves and which allows them to be used effectively in the making of clothing.

Different techniques have been developed so as to allow the production of linings which themselves have a feel, flexibility and nervousness, functions of the application for which they are intended.

More particularly, for example, patent application FR-A-2 645 180 relates to a stabilizer textile, composite, formed of a knitted or woven textile support and at least one nonwoven web. The support and the sheet are combined by needling by fluid jets.

Furthermore, patent application FR-A-2 637 163 is also known, which relates to a heat-bonding interlining, the textile base of which is a nonwoven formed of synthetic filaments intermingled by jets of fluids.

The first of these techniques is particularly interesting because the manufacture of a composite interlining makes it possible to choose with precision and to control the properties of the interlining.

On the other hand, the presence in this composite interlining of a knitted or woven textile support which brings significant advantages (dimensional resistance, wrinkle resistance, etc.) has the disadvantage, for other applications, of having a relatively high cost. However, the presence of this knitted or woven textile support was, until now, considered necessary in this type of composites.

Document EP-A-0 333 212 relates to an elastomeric composite nonwoven obtained by entanglement by fluid jets of a laminate consisting of at least one layer of "melt-blown" fibers and at least one additional layer of fibers discontinuous, "melt-blown", of continuous filaments.

Finally, according to European patent EP-A-0 333 211, a composite nonwoven is also proposed, formed also by fluid jets of a laminate composed of at least one layer of "melt-blown" fibers and at least a layer of a nonwoven material. The latter can be based on continuous filaments and preferably obtained by the melt process ("spunbond"). This document also relates to the method of manufacturing such a composite nonwoven.

In addition to the drawbacks mentioned above, these two documents have the disadvantage of using a conventional melt-blowing process generating a high degree of cohesion in the web.

Such a process also simultaneously generates a dense layer having a feel similar to a plastic film, incompatible with the textile feel sought for a covering.

The object of the invention is therefore to produce a composite interlining whose properties can be widely varied and which makes it possible to complete the range of already existing products.

It is also an objective of the present invention to produce a thermo-adhesive interlining presenting little risk of crossing and returning.

It is also an objective of the present invention to provide a composite interlining having a good quality-price ratio.

To this end, the invention relates to a covering textile according to claim 1. According to the invention, the covering textile comprises at least a second non-woven layer, composed of fibers or filaments and a layer of adhesive distributed in points. The first layer and the second layer are linked, on the one hand, partially by the entanglement of part of their fibers obtained by the application of fluid jets and, on the other hand, completely by the base of the points of the layer of adhesive which keeps the fibers intertwined thus ensuring the cohesion of the whole.

According to a particularly advantageous embodiment, the interlining textile of the invention also comprises a third layer, nonwoven, which can either be made up of filaments, for example synthetic filaments obtained by the melt process, or of micro-fibers manufactured by fusion -blowing. In this case, this third layer is linked to one of the other two layers also by entanglement of some of their fibers obtained by the application of fluid jets.

According to the invention, the first nonwoven layer of micro-fibers is produced by meltblown and the second nonwoven layer is formed, then placed under the first layer. The first and second layers are intermingled and joined together by fluid jets, the two joined layers are then dried.

The second nonwoven layer is carded, it is advantageously folded and coated before being associated with the first layer.

The second layer is advantageously pre-needled. It can consist of a fleece of nonwoven formed of continuous filaments intermingled without orientation and made from synthetic material by the melt process also known under the name "spunlaid-spunbond".

• La figure 1 est une représentation schématique de l'entoilage de l'invention.
• La figure 2 est une représentation schématique d'un premier mode de fabrication, selon l'invention.
• La figure 3 est une représentation schématique d'un deuxième mode de réalisation de l'invention.
• La figure 4 est une représentation schématique d'un troisième mode de réalisation de l'invention.
• La figure 5 est une représentation schématique d'un quatrième mode de réalisation de l'invention.
• La figure 6 est une représentation schématique d'un cinquième mode de réalisation de l'invention.

The invention will be described in more detail in the description which follows and with reference to the figures in which:

• Figure 1 is a schematic representation of the interlining of the invention.
• Figure 2 is a schematic representation of a first manufacturing method according to the invention.
• Figure 3 is a schematic representation of a second embodiment of the invention.
• Figure 4 is a schematic representation of a third embodiment of the invention.
• Figure 5 is a schematic representation of a fourth embodiment of the invention.
• Figure 6 is a schematic representation of a fifth embodiment of the invention.

The interlining textile of the invention comprises a first nonwoven layer 1 composed of micro-fibers produced by meltblown. This manufacturing process known under the name of "melt-blown" allows the production of a synthetic nonwoven fabric made up of micro-fibers. It has good regularity and has a flat surface resulting, at the same time, from the fineness of the fibers which constitute it and from its manufacturing process. The large number of micro-fibers gives it excellent coverage.

On the other hand, in addition to these qualities, the layers of nonwoven "melt-blown" fabric have a certain number of drawbacks for their use in the field of interlining. Indeed, the interlining must resist cleaning and washing. To obtain this resistance, it is necessary to manufacture the non-woven "melt-blown" layers with a high air pressure which strongly projects the filaments onto the receiving mat, which gives a high degree of cohesion to the sheet. However, simultaneously, high air pressure produces a dense layer having a film-like feel. plastic, which is ill-suited for use in interfacing.

For this reason, the first nonwoven layer 1, composed of micro-fibers, used in the invention, is produced by blowing with a relatively low air pressure during spinning. The distance between the nozzles of the extruder 34 and the receiving belt 33 acts on the cooling of the fibers before their deposition and, thereby, on the feel of the sheet, at the same time as the air pressure. A distance of the order of or less than 350mm gives a plastic feel while a distance greater than 500mm is chosen, preferably for the implementation of the invention and provides a textile feel. Thus, this layer is flexible and has a textile feel.

It is for example formed of fibers having a titration of between 0.1 and 0.7 dtex.

The interlining textile has a second non-woven layer composed of fibers. This layer provides the interlining with its resilience (nervousness) which makes it wrinkle-resistant, its volume, its resilience, ...

The first layer 1 and the second layer 2 are linked by the entanglement of part of their fibers obtained by the application of fluid jets. According to this technique, fine needles of water, produced by high pressure injectors, are directed perpendicular to the two layers previously placed one on the other. These fluid jets cause the micro-fibers of the first layer 1 to become entangled in the surface fibers of the second 2.

The interlining fabric of the invention is thermo-adhesive. It comprises an adhesive layer 3 distributed in points on the first nonwoven layer 1, on the face opposite to that in contact with the second nonwoven layer 2. These thermo-adhesive points participate in the feasibility of the product. The cohesion of the first nonwoven layer 1 composed of micro-fibers produced by melt-blowing on another textile support is relatively weak but is improved by the thermo-adhesive dots which promote the strength of the fibers and allow binding.

Indeed, the first layer 1 and the second layer 2 are linked, on the one hand, partially by the entanglement of part of their fibers by the application of fluid jets and, on the other hand, completely by the base points of the adhesive layer 3 which maintains the intertwined fibers ensuring the cohesion of the assembly.

The second nonwoven layer 2 can be composed of carded, scrambled, random orientation staple fibers. Carding web 2 can also be made with parallel fibers.

It can also be composed of carded fibers linked by thermal bonding. This bonding contributes to giving cohesion to the sheet before it is assembled to the first layer 1.

Prior to its association with the first layer 1, the second layer 2, nonwoven, composed of carded fibers can be needled so as to increase its cohesion and its stiffness.

This second layer 2 advantageously consists of a fleece of nonwoven formed of continuous synthetic filaments intermingled without orientation obtained by the melt process ("spunbond").

The titration of the filaments forming the second nonwoven layer is in this case advantageously between 1 and 5 Dtex and, preferably, equal to 1.5 dtex.

A third non-woven textile layer may be associated with the first and second layers 1, 2. Depending on the application envisaged, the nervousness, the resistance to piercing which it is desired to give to the interlining, this third layer may be a layer of carded fibers or made up of synthetic filaments obtained by the melt and it is then a layer similar to the second. The third layer can, on the contrary, be of the same type as the first, that is to say composed of micro-fibers produced by meltblowing. It can be superimposed on the first layer or, on the contrary, placed on the other face of the second layer which is then sandwiched between the two layers of micro-fibers, "melt-blown".

A manufacturing process will now be described with reference to FIGS. 2 to 6.

The second layer 2 is brought, covered by the first layer 1, onto a conveyor belt 10 which drives them facing a first series of injectors 11. After turning over the composite composed by the first two layers using the rollers 12 of the conveyor belt 13 and rollers 14, 15 and 16, the composite is brought in front of a second set of injectors 17 which produces fluid jets first passing through the second layer 2. After deflection by the rollers 18, 19 and 20, the composite is expressed by the rollers 21 and then dried in the oven 22. After drying, the interlining thus produced is stored on the roller 23.

In the embodiment shown in FIG. 2, the second layer 2 is formed on a card 30 and then brought by the roller 31 and the belt 32 onto the belt 33 by a melting-blowing extruder generally represented by the reference 34. The micro-fibers 35 formed by extrusion, melt-blowing, by the extruder 34, form the layer 1 directly on the second layer 2.

Preferably, the layer 1 is formed by the "melt-blown" process from polyamide or polyester. Its weight is between 5 and 80g / m. The second layer of fibers 2 is a sheet of carded fibers of random orientation, the weight and composition of which vary according to the desired effect.

The second layer of fibers can be a sheet of parallel carded fibers.

FIG. 3 represents a process for manufacturing the interlining in which the second ply of fibers 2 is a ply of fibers in a cross orientation as a function of the desired properties. The sheet of carded fibers 2, at the outlet of the carding line 30, is presented to a lapping folder 36, 37 which gives it its crossover. The second layer 2 is then transmitted to the carpet 33 by the conveyor 32.

In Figure 4, a manufacturing process is shown in which the second layer 2 has been pre-needled and then temporarily stored on the roller 38 which supplies the conveyor 33.

In this case, the pre-needling can be carried out either by means of a mechanical needling machine or, also, by a system of fluid jets on a sheet of carded fibers at the outlet of the carding or carding-topping line, so as to give cohesion to the veil of fibers. This pre-needling operation allows the process of the invention to be carried out batchwise, separating the carding phase from the extrusion, melt-blowing and jet-fluid bonding operations.

Likewise, a non-woven veil of synthetic filaments ("spunbond") has sufficient cohesion to be stored in a roll.

FIG. 5 shows an embodiment of the process in which the first non-woven layer of micro-fibers produced by the "melt-blown" process is itself previously produced and then wound on the roller 39. Thus, the manufacturing the first "melt-blown" layer is dissociated from the implementation of the invention, which allows all intermediate storage deemed useful.

In FIG. 6 is shown a manufacturing method according to the invention in which the second nonwoven layer 2 is formed directly on the carpet 33 by the extruder 40 according to the melt process ("spunbond") then associated with a layer produced by melt-blown produced by the extruder 34 directly on the second nonwoven layer 2.

The third layer 41 is deposited on the first nonwoven layer of micro-fibers 1 and the three layers 1, 2, 41 are all three associated together by the fluid jets produced by the injectors 11 and 17.

The structure of the composite interlining of the invention makes it possible to freely choose the nature and the properties of each of these layers and, thereby, to cover a very wide range of needs encountered in the field of interlining.

Claims (7)

1. A thermoadhesive interlining textile including a nonwoven first layer (1) made up of microfibers manufactured by melt-blowing with a low air pressure during the spinning and of at least a nonwoven second layer (2)wherein the first layer (1) and the second layer (2) are bonded partially, on the one hand, by the overlapping of part of their fibers, by applying fluid jets, and completely, on the other hand, by an adhesive layer (3) which keeps the fibers interlaced, thus ensuring the cohesion of the whole, characterised in that the second layer is made up of carded discontinuous fibers and in that the adhesive layer (3) is distributed in points bonding said layers by the base of the points.
2. An interlining textile according to claim 1, characterised in that the nonwoven second layer (2) is made up of carded fibers bonded by thermal bonding. 3
3. An interlining textile according to claim 1, characterised in that the nonwoven second layer (2) is made up of needled carded fibers.
4. An interlining textile according to claim 1, characterised in that the second layer (2) consists of a nonwoven web made up of synthetic continuous filaments entwined without orientation and obtained by means of the "spunbond" process.
5. An interlining textile according to claim 4, characterised in that the yarn numbering of the filaments making up the nonwoven second layer (2) is greater than 1.5 decitex.
6. An interlining textile according to any of claims 1 to 5, characterised in that it includes a nonwoven third layer made up of synthetic continuous filaments obtained by means of a "spunbond" process and bonded to one of the other two layers by the overlapping of some of their fibers, obtained by applying fluid jets.
7. An interlining textile according to any of claims 1 to 5, characterised in that it includes a nonwoven third layer bonded to one of the other two layers by the overlapping of some of their fibers, obtained by applying fluid jets.

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