EP0019615B1 - Method of producing lining material or filling material for wadded articles - Google Patents

Abstract

Down-like inter-lining fibrous material for quilted articles is in the form of an element having a given length and a low thickness compared with its width and comprises a central thread-like web (1) relatively dense and rigid compared with the material as a whole. Fibers (2) are oriented in the plane of and bound to the web on both sides and entangled so as to form a homogeneous voile. In a method of making the material, a plurality of spaced heat-sealing threads (6) are superimposed and then fused to one side at least of a fibrous sheet (4) of known form, and the sheet is then cut on either side of a thread to form strips (10) which are then cut into the elements (12) of a given length. The partition of the sheet into strips is preferably carried out by running the threads through eyeletholes after they have been bound to the fibrous sheet. The partition may also be obtained by cutting.

Description

The present invention relates to a method of manufacturing filling or filling materials for wadded articles, based on fibrous material, in the form of elements of defined length, of small thickness compared to its length, comprising central wires relatively dense and rigid compared to all of the materials, said yarns being superimposed at equal distances on at least one of the faces of a fibrous sheet formed in a known manner and glued with the fibrous sheet, said fibrous sheet being divided into strips of on each side of each wire and finally, said strips being cut into elements of determined length, the fibers of which are oriented substantially transversely with respect to the wires and entangled with one another so as to form a homogeneous veil disposed on both sides 'other son substantially in the same plane.

Quilted or quilted articles have been known for a long time; they essentially consist of an external envelope, generally based on fabric or knitting which traps an internal layer constituted by feathers and / or various natural or chemical fibers in the form of sheets.

In general, it is requested that the filling materials allow obtaining a bulky structure, of a low weight, having a high insulating power, a satisfactory air permeability, as well as an excellent elasticity allowing the together to regain its bulk when the article is subjected to successive loads and discharges.

These requirements are difficult to fulfill simultaneously and, in general, the filling materials are chosen according to the articles produced. This is moreover well shown by the article published in the review "Textiles Chimiques" from July / August 1969, pages 373 to 379.

Traditionally, quilted products were made in the past from natural materials such as cotton, wool, kapok, and feathers. In recent years, it has been proposed to replace natural fibers with chemical materials such as in particular polyester fibers or the like. It has also been proposed to produce packing plies directly from cables of chemical son, by spreading the filaments constituting these cables and treatment in order to give them bulk and cohesion.

However, in the case of articles for which a large volume is required, a weight as low as possible, a great power of thermal insulation and air permeability, it must be recognized that to date, only the feathers natural give good results. It is obvious that this material is available in limited quantities, which, consequently, leads to expensive articles. It has certainly been proposed to mix natural feathers with a certain proportion of chemical fibers to reduce costs and increase the amount of material available, but it must be recognized that these solutions do not give good results because, on the one hand these mixtures are difficult to produce and, on the other hand, the characteristics of the products obtained are not comparable to those communicated using only natural feather.

In French patent No. 456,845 and its addition No. 19,049, a method of manufacturing artificial feathers is proposed in several stages, the first consisting in preparing beards by means of fabric or sheet of carded textile material bonded to parallel wires then cut between each of said wires, the second consisting in gluing the barbs thus prepared on flexible rods then in cutting to the desired shape. Besides that this process is a several steps therefore long, can practical to implement, the recommended rods consist of flat bands, in celluloid, can conform to the round rod or to ovoid section of natural feathers.

In US Patent No. 3,715,878, a fancy chenille type wire is proposed made by gluing or heat-bonding longitudinal wires and transverse wires, cutting transverse wires between the longitudinal wires, thus creating strips which are then wound. This product is relatively regular due to the cut, on the other hand, there may be irregularities in bonding, non-bonded fibrous elements being taken along with the finished chenille strip for winding may create disturbances during subsequent use. caterpillar-like yarn due to the presence of these parasitic fibrous elements.

In German patent application No. 1,111,140, it is also proposed to produce a thread of the above type by bonding threads on fibrous webs and tearing the fibers between two threads after bonding. This process, like the previous one, leaves parasitic fibers which are detrimental to subsequent use.

However, we have found, and this is what is the subject of the present invention, a new manufacturing process for filling material, economical, allowing the production in unlimited quantity and in a single step, which thus overcomes the drawbacks. and allows to produce a material whose properties are comparable to those made from natural feathers.

• a) les fils centraux collants sont remplacés par des.fils thermocollants associés aux fils ordinaires,
• b) la division de la nappe fibreuse en bandes est effectuée par arrachement des fibres par passage de chaque fil dans un oeillet, les fibres passant dans l'oeillet dans lequel passe le fil auquel elles adhèrent le plus solidement.

The subject of the present invention is a process for the continuous manufacture of filling or filling materials for wadded articles, based on fibrous material, being in the form of elements of defined length, of small thickness compared to its length, comprising sticky central threads relatively dense and rigid with respect to all of the materials, said threads being superimposed at equal distances on at least one of the faces of a fibrous sheet formed in a known manner and glued with the fibrous sheet, said fibrous web being divided into strips on either side of each thread and finally, said strips being cut into elements of determined length, the fibers of which are oriented substantially transversely relative to the threads and tangled together so as to form a homogeneous web placed on either side of the wires substantially in the same plane, characterized in that:

• a) the sticky central wires are replaced by fusible wires associated with ordinary wires,
• b) the division of the fibrous web into strips is effected by tearing off the fibers by passing each thread through an eyelet, the fibers passing through the eyelet through which the thread to which they adhere most firmly passes.

The filling material thus obtained imitating the natural feather, can schematically be considered to consist of a flexible textile filiform rod, on either side of which are distributed and to which adhere textile fibers forming barbs.

Advantageously, the connection of the spaced wires with the sheet is obtained under the combined action of heat and pressure, for example by passing between two heating cylinders.

The use of a single ply of threads superimposed on the fibrous ply is generally well suited for weights of the latter of up to 50 grams per square meter; beyond, the number of bonded fibers decreases and it is then proposed to place the fibrous sheet between two layers of heat-bonded son, these two layers being offset relative to each other by a half-space; practically, all the fibers are then glued to one or the other layer of threads under the influence of the heat associated with the pressure, the separation into strips being carried out naturally by passing the threads through eyelets which also serve as purifiers thus avoiding the presence of parasitic fibers which, entrained, would later harm the quality of the article to be produced. These eyelets can have any shape, oval or round; however, it is important that their diameter is preferably smaller than the space separating two wires. These eyelets are generally mounted on heddles, themselves held by a frame as they appear to hold the warp threads on a loom.

The textiles used are artificial and / or synthetic. Preferably, the rod-forming wire consists of the assembly of two wires having different bonding points, for example one being based on an interpolyamide, the bonding point of which is close to 120 to 140 ° C, and the other based on polyamide 6-6. The wire of the rod can possibly be crimped or wavy.

The fibrous material linked to the central core constituted by the above-mentioned yarn is advantageously constituted by chemical fibers, such as polyester fibers, natural or artificial fibers, used alone or in the form of mixtures, of the same title or of title different, same section or different sections, same cut or different cut.

In order to avoid as much as possible the formation of lumps or bundles of fibers in the made-up textile articles containing the padding material which is the subject of the first request, fibers having at most 5 undulations at the most will be used for the formation of the veil. centimeter.

If fibers having undergone the silicone elastomer type treatment are used, there may be difficulties in bonding the fusible wires; in this case, some of them, prior to their deposition on the fibrous web, continuously or discontinuously with this operation, are coated with silicone material and preferably dried around 180 ° C. The application at the time of implementation of the heat and pressure process, either by plate or on a calender, will then allow the bonding of the wires and silicone fibers.

The padding materials obtained by the process which is the subject of the present application can be of the same dimension or of different dimensions. This is how they can be of different length. They can also be of different widths; this is obtained by not spacing the wires regularly or by spacing them regularly but at spaces of different sizes. This gives a varied padding material, the mixture of products of different sizes can only provide more comfort.

It is possible, before separating the product into strips, to practice its coloring, for example by printing / transfer.

After gluing and before separation, if it is a question of separation by passage through the eyelets, a light brushing can be carried out to ruffle the fibers and take away the unwanted superfluous fibers which are deposited on a cleaning roller of the known type in spinning.

• - Les figures 1 et 2 illustrent schématiquement en vue de côté et en vue de dessus, un dispositif permettant la réalisation du produit selon l'invention.
• - Les figures 3 et 4 montrent respectivement, en vue de dessus et en vue de côté, le nouveau matériau de garnissage conforme à l'invention.
• - La figure 5 illustre schématiquement en perspective un tel matériau.

The invention and the advantages which it brings will however be better understood thanks to the embodiment given below and illustrated by the appended diagrams in which:

• - Figures 1 and 2 schematically illustrate in side view and in top view, a device for the production of the product according to the invention.
• - Figures 3 and 4 show respectively, in top view and in side view, the new packing material according to the invention.
• - Figure 5 schematically illustrates in perspective such a material.

As can be seen in Figures 3, 4 and 5, the new packing material, obtained by implementing the method of the invention, is in the form of an element of defined length, of small thickness with respect to its length, consisting essentially of a central donkey 1 which is threadlike, relatively dense and rigid with respect to the whole of the material, to which are attached fibers 2 oriented substantially transversely to this core 1, said fibers being entangled with to each other and forming a homogeneous veil. These fibers 2 are arranged on either side of the core 1.

Optionally, in order to accentuate the resemblance to a natural feather, it is possible, as shown in FIG. 5, to later taper the end of the material.

Obtaining such a material is obtained in a simple manner as illustrated in FIGS. 1 and 2. A fibrous sheet 4 is produced in known manner, which is packaged in the form of a roll 3, for example by means a carding machine, a pneumatic device. A plurality of spaced heat-bonding wires 6, superimposed for example from individual coils 5, are superimposed on this sheet, coming from the roll 3. The wires 6 are regularly spaced on said sheet 4. By passing between heating rollers 7-8 , the connection is caused to the surface of the ply 4. This connection is obtained thanks to the heating rollers 7-8. Advantageously, these rollers exert a pressure which promotes the connection of the two constituents. Continuously, each wire is passed through eyelets 9 thus causing the tearing of the sheet and the formation of bands 10, the fibers pass into the eyelet through which the wire 6 passes to which they adhere most securely. Then said strips 10 are cut, for example by means of knives 11 so as to obtain elements 12 of determined length which are recovered in a storage member 13.

The filling material obtained by the process which is the subject of this application is used on the same materials as those used for natural feathers.

The padding material obtained is used for padding, wadding articles of bedding (pillows, bolsters, eiderdowns, bedspreads, bedspreads, etc.), clothing, furnishings, in the manufacture of clothing , for decoration, headgear and for thermal and sound insulation.

The following examples illustrate the present application without limiting it.

Example 1

From fibers of polyethylene terephthalate, 3.3 dtex, 45 mm in size, with 3 undulations per centimeter, a sheet of weight 50 g / square meter is produced. As indicated in FIGS. 1 and 2 appended, there is superimposed on said fibrous sheet 4 thus formed a sheet of threads made up 6 for each of a monofilament of polyethylene terephthalate with a diameter of 24/100 mm, twisted to 100 turns per meter, with a polyethylene monofilament; the wires are spaced 20 mm apart from each other.

The calendering at 180 ° C. of the fibrous web / web of yarns causes the polyethylene to melt and the fibers of the web to adhere to the yarns. The strips 10 are formed by passing each son through a round eyelet 9 with a diameter of 15 mm, the fibers passing through the eyelet through which the wire passes with which they adhere best. The running speed of the assembly is 6 meters / minute; the strips 10 thus produced have an average width of 15 to 20 mm. These strips are then cut transversely by means of knives 11 into elements 12 of length 10 centimeters, and collected in a container 13.

Example 2

On a pneumatic device, a fibrous sheet of fifty grams per square meter (50 g / m ² ), 1.50 meters wide, is produced from polyester fibers of 3.3 dtex, cut 40 mm 4 corrugations at centimeter. The sheet thus formed is wound in the form of a roll 3.

Wires produced on the basis of fusible material and constituted by the assembly of a wire based on an interpolyamide, for example based on polyamide 66/6, polyamide 66/10, are superimposed on the sheet 4 thus formed. the bonding point is between 120 and 140 ° C and a 6-6 polyamide wire. These two wires are assembled at 60 turns / meter and the total titer of the assembled wire is 600 dtex.

The wires 6 are spaced 15 mm from each other.

By passing between two heating cylinders 7-8 brought to a temperature of 140 ° C., the upper cylinder exerting a pressure of 10 kilos per square centimeter, the bonding of the wires 6 is caused on the web 4. The speed of movement of the set is 5 m / minute.

After securing the wires 6 on the sheet 4, the assembly thus formed is separated by passing the wires 6 through the eyelets 9. In this way, strips 10 having a width of 15 mm are produced and having in their central part a wire continuous 6. These strips are then cut by means of knives 11 into elements 12 of defined length.

The article obtained therefore comprises a relatively dense and rigid filiform central core 1 to which fibers 2 are linked which form a homogeneous veil and which are oriented substantially relative to this transverse core giving the appearance of a natural down.

Such an article is particularly suitable for filling materials to replace natural feathers. It makes it possible to communicate to the articles produced properties comparable to previous articles made from natural down and feathers, in particular with regard to the volume and the power of insulation. It is economical to make, easy to store. In addition, it has the advantage of being able to be used as it is on conventional equipment making it possible to produce filling articles using natural feathers.

It is obvious that this article can also be used in the form of a sheet after transformation on suitable equipment and in particular pneumatic equipment.

Claims (6)

1. Process for the manufacture of a padding or lining material for quilted articles, based on fibrous material, in the form of elements of defined length and a low thickness relative to the width, which comprises central bondable threads (1), relatively dense and rigid compared to the whole of the material, the said threads (1) being located on at means one side of a fibrous web (4) of known fibrous material, and bonded to the said fibrous web (4), the fibrous web (4) being divided into strips (10) on either side of each thread (1) and finally cutting the strips (10) into elements (12) of defined length, into which the fibres (2) are oriented substantially transversely relative to the threads (1) and being entangled with one another so as to form a homogeneous thin web located on either side of the threads (1) substantially in the same plane, in which:

a) the central bondable threads (1) are replaced by heat-weldable threads (6) associated with other threads,

b) the dividing of the fibrous web (4) into strips (10) is made by stripping of fibres (2) during the passing of each thread (6) through eyelet (9), the fibres (2) passing through the eyelet (9), through which passes the thread (6) to which they adhere most firmly.

2. Process for the manufacture of a padding material for quilted articles, according to claim 1, in which the fibrous web (4) is trapped between two webs of heat-weldable thread (6), these two webs being staggered relative to one another by half a space.

3. Process according to claim 1, in which the heat-weldable thread (6) is coated with a silicone material.

4. Process according to claim 1, in which the fibres (2) bonded to the heat-weldable threads (6) have fewer than 5 waves per centimetre.

5. Process according to claims 1 and 4, in which the fibres (2) bonded to the heat-weldable threads (6) are silicone-treated.

6. Padded textile articles, containing, at least in part, padding materials obtained by the process which forms the subject of claims 1 or 5.

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