DE102017001102A1 - Bi-elastic down density nonwoven insert - Google Patents

Abstract

A bi-elastic insert comprising a meltblown nonwoven fabric comprising melt-spun meltblown polyurethane fibers, the nonwoven fabric having on at least one side a foam coating containing vinyl acetate copolymer and / or polyacrylate and / or polyurethane. The insert can be made with a light weight per unit area and yet at the same time have feather density as well as good air permeability and tear resistance for good wearing and usage properties.

Description

The present invention relates to a bi-elastic insert, which can be made with a light weight per unit area and yet at the same time has feather impermeability and an air permeability and tear resistance required for good wearing and service properties. The invention further relates to a method of making the insert and its use for preventing the leakage of down from a down filled textile product.

Inserts are usually processed in the manufacture of clothing with outer fabrics to achieve a shaping of the garment. They form the "framework" of clothing. As insert usually nonwovens, fabrics or mesh formed from textile surfaces, mostly knitted fabrics used. During processing, the insert is sewn and / or glued to the outer fabric, which has mostly been woven or formed from stitches.

According to their deformation behavior, a distinction is made between stable, mono-elastic and bi-elastic inserts. While stable inserts undergo irreversible deformation during stretching, mono-elastic inserts are characterized by a reversible deformation behavior in one direction (longitudinal or transverse direction). Bi-elastic inserts are characterized by a reversible deformation behavior in both directions (longitudinal and transverse directions).

Inserts are usually selected in their application so that their formability is adapted to the outer fabric. A bi-elastic outer fabric is ideally processed together with a bi-elastic insert. The bi-elasticity of an insert can be measured with DIN 53835-2: 1981-08. The insert is usually well adapted to most bi-elastic outer fabrics in their formability, if they are non-destructive in a longitudinal direction and transverse direction in a test of zugelastischen behavior according to DIN 53835-2: 1981-08 up to an upper reversal point of at least 25% elongation and additionally has a residual elongation of at most 10% and / or, preferably a residual elongation of at most 12%.

In combination with the outer fabric, the insert should give a low shrinkage, a good care behavior, ie a good wash resistance and chemical cleaning resistance and a soft, textile feel with good Drapierfähigkeit. If the composite with the outer material is subjected to a thermal process, such as ironing or washing, then the insert should not or only weakly bond, so that a nondestructive separation is possible. In terms of weight, the insert is also suitably matched to the outer fabric. For light outer fabrics, ideally very light inserts are used.

Usually, the insert should not or only slightly visible after processing on the outside of the outer fabric. Furthermore, it should match the appearance of the outer fabric as well as possible and also not be visible on the outer fabric, for example, due to their thickness, or be visible on the outside of the outer fabric due to their color, structure or gloss.

According to the invention, the insert is intended as an additional function to prevent down migration in textiles with down filling.

In addition, the air permeability of the insert itself and the composite of liner and outer fabric should be within certain limits. As a result, a very good thermal effect of the textile can be achieved. Such properties can be achieved with deposits whose air permeability is measured according to DIN EN ISO 9237: 1995-12 in the range of at least 20 [dm ³ / s ^* m ² ] to 450 [dm ³ / s ^* m ² ]. Another advantage of adjusting the air permeability to the above values is that entrapped air can escape sufficiently quickly when compressed so that no balloon effect occurs during compression. Thus, the compression of textiles, which are provided with the insert according to the invention, as for example when packaging in a suitcase or when washing in the washing machine, in a satisfactory manner possible. In addition, with an air permeability of at least 20 [dm ³ / s ^* m ² ], it is possible to inject down with air into the liner without a balloon effect occurring.

An air permeability of less than 20 [dm ³ / s ^* m ² ] may cause the down filling to dry only poorly after it has become moist. It can then come to biological processes, such as bacterial growth, fungus or mold. In addition, the air exchange is no longer sufficiently ensured, so that sweat accumulates between the skin and the fabric, which reduces the comfort and can cause cold to the wearer.

Higher air permeability values than 450 [dm ³ / s ^* m ² ] are also not advantageous. If air and wind penetrate too much through the composite of the liner and the outer fabric, there is no longer sufficient heat effect. At higher air permeability values, the tightness is generally insufficient to ensure sufficient down-density or down migration resistance.

Down, also known as a lower spring, are short-keeled feathers with soft feathered branches. Down is used in textile products, such as jackets, bedding or sleeping bags, as thermal insulation fillers. The downs are contained and enclosed in sheaths of flat textile structures. Down-filled textile products must be "down-proof" when used as intended. This means the downs will not pierce through the sheaths and / or get out (migrate). Since duvets of down are pointed and hard, the casings must have a high tear resistance. In the context of this invention, the term "down" refers to down feathers (bottom feathers) of birds which are suitable for textile fillings. A definition of down is used in the DIN 12934 given. Down are especially feathers with a very short keel and long, radially arranged spring branches. Down also regularly has fewer hooks than other feathers. Because of their high elasticity and dimensional stability in combination with heat-insulating properties down are used for a variety of textile applications.

Down migration refers to the penetration of down or feather particles through the outer fabric when manually stressed in textiles with fillings that contain wholly or partially down, in particular by surface friction, as it results when wearing, washing or chemically cleaning the garment. When they exit, the particles can damage the outer fabric and are undesirable because they are visible there. Massive migration worsens the thermal effect of the garment because the mass of the filling is reduced.

To prevent down migration, down-density fabrics are currently being used as insoles. The tightness of fabrics against down can be z. B. according to the standard test method GB / T 12705.2-2009 "Textile - Methods of testing the down-proof properties of fabrics - Part 2 tumble test" be determined, here a number of penetrated particles of less than 15 is considered to be good or acceptable.

Down-density fabric inserts usually achieve their down-density due to a high thread density and fineness due to the use of very fine yarns. However, they offer low elasticity and air permeability. They can not be processed satisfactorily with elastic outer fabrics because their formability does not adapt well to bi-elastic outer fabrics. In addition, such down-density fabric inserts may be visible on the outside of the garment when processed with very light, transparent outer fabrics due to the moiré effect resulting from the overlaying of the fabric structure of the liner with the fabric or mesh structure of the outer fabric.

For very light, transparent outer fabrics usually very light deposits with low basis weight and thickness must be used. This is problematic in woven and knitted fabrics, as they can be produced only with great effort at low production speeds, high costs and quality problems. In fact, very fine yarns / filaments must be used. However, these are difficult to process and usually have such a high fineness and lubricity that it hardly manages to lay them smoothly and wrinkle-free in the processing with the outer material and cut them thread straight and dimensionally accurate. Such inserts tend to wrinkle or slip, resulting in difficult handling and poor processability.

In addition, there are currently no commercially available fabrics on the market which are bi-elastic at the same time and suitable for use as a down migration resistant insert.

Deposits made of nonwovens can be well cut even in small basis weights and wrinkle-free and can be processed due to their structure without the named problems. Very light nonwovens are usually made from staple fibers or from very fine staple fibers with titers below 1 dtex. Such nonwoven fabrics have a soft feel and can be produced in particular with low surface weights with good tear strengths.

It is proposed in the prior art to use nonwovens for the storage of down as a component of laminates. For example, the JP2008 / 303480A to use a composite material of a fabric with a nonwoven fabric. Also the JP2006 / 291421A discloses down-density laminates, containing the thermally bonded nonwovens. However, laminates are usually relatively expensive to produce, also because the components must be glued or otherwise firmly bonded together.

Nonwovens with bi-elastic deformation behavior can usually be produced only consuming. In addition, they are usually down-proof only with dense structure and high grammage at the same time.

The object of the present invention is to provide a bi-elastic insert which can be produced in a simple manner and whose formability is well adapted to most bi-elastic outer fabrics and has good or at least acceptable down density even at low basis weights.

The insert should be able to have a good permeability to carry and use air permeability, a soft feel and in combination with the outer fabric a good heat effect.

Finally, the insert should have a suitable for processing lubricity.

If necessary, the insert should also be produced with a small thickness and have the necessary tear strength for good processing.

This object is achieved by a bi-elastic insert comprising a meltblown nonwoven fabric containing melt-spun meltblown polyurethane fibers, wherein the nonwoven fabric has on at least one side a foam coating containing vinyl acetate copolymer and / or polyacrylate and / or polyurethane.

According to the invention, it has been found that the insert according to the invention has a high bi-elasticity due to the use of elastic polyurethane fibers in combination with a foam coating of polymers of likewise high elasticity.

As a result, the insert in its formability is well adapted to most bi-elastic outer fabrics. In addition, the insert has a good or at least acceptable down leak even at low basis weights. This is presumably due to the fact that the foam coating very effectively closes the passageways for down in the nonwoven fabric and increases its puncture resistance and tear resistance.

Due to the inherently high air permeability of foam structures, the insert can also have a required for good wearing and use properties air permeability. Finally, the use of polyurethane in combination with the polymers used for the foam coating allows a soft feel and in combination with the outer material a good heat effect.

In addition, it has surprisingly been found that the insert according to the invention has a low shrinkage during washing and drying. This was not to be expected since, on the one hand, nonwovens based on polyurethane fibers generally have a high shrinkage and, on the other hand, in the use of fibers and foam coatings, which each contain polymers with a low softening and / or glass transition temperature, an increased shrinkage behavior would have been expected. It is believed that the low shrinkage tendency is due to the stabilizing effect of the foam coating, by stabilizing the fibers at least superficially by gluing. This bonding can be particularly intensive if the foam coating contains the vinyl acetate copolymer and / or polyacrylate and / or polyurethane in at least partially crosslinked form.

Thus, the shrinkage of the insert according to the invention is preferably below 5%, more preferably below 3%, most preferably below 2%.

Furthermore, it was surprisingly found that the insert according to the invention is also suitable for full-surface application, i. more than 95% of the surface is covered with the foam coating, has a soft touch.

Furthermore, it was surprisingly found that the insert according to the invention, if it is prepared as a nearseal and not using a conventional hotmelt adhesive as a fuser insert, despite the use of fibers and foam coatings, the respective polymers with low softening and / or Glass transition temperature, in thermal processes such as ironing up to 110 ° C or washing at 40 ° C not or only weakly stick together that they can be separated again non-destructive.

Furthermore, it has surprisingly been found according to the invention that the insert according to the invention in the thermal fixation with a structured outer material can be plastically adapted to the outer material and assume its structure. The structure of the outer fabric is transferred to the insert and stands out on it. The insert thus has an outstanding formability.

According to the invention, polyurethane fibers are understood as meaning fibers which contain polyurethane, preferably in a proportion of more than 90% by weight, more preferably of more than 95% by weight. In particular, the polyurethane fibers are made of polyurethane, whereby conventional additives may be included. Particularly suitable polyurethanes are elastic polyurethanes with aromatic and / or aliphatic chains, based on polyester, polyether and / or polycaprolactone chemistry. Aliphatic polyurethanes are advantageous because of their higher yellowing resistance. Preferably, the polyurethane fibers have a softening range of over 120 ° C, preferably from 160 ° C to 175 ° C.

The preparation of the meltblown nonwoven fabric, also called nonwoven fabric for short in the following, can be carried out in a known manner by means of the meltblown process.

In the meltblown process, webs of fibers spun directly from polymer melts passing through nozzles and drawn to rupture by hot air streams are formed by immediate laydown. The result is so-called meltblown webs. The solidified nonwovens based thereon are referred to as meltblown nonwovens. Meltblown fibers generally have a very low titer. According to the invention, this is preferably less than 1 dtex, for example between 0.1 and 1 dtex.

Accordingly, the average fiber diameter of the fibers is preferably less than 1 μm (microns), in particular less than 0.5 μm, for example between 0.1 μm to 1 μm. For the purposes of the present invention, the determination of the average fiber diameter of optical measuring methods, in particular a picture-analytical evaluation of images with a scanning electron microscope (SEM images), is assumed. This includes a statistically valid analysis method for reproducible, objective and thus representative statements about fiber diameter and their scattering at several measuring points.

According to the invention, the nonwoven fabric is a nonwoven fabric containing meltblown polyurethane fibers. The proportion of polyurethane fibers in the meltblown nonwoven fabric is preferably more than 90% by weight, more preferably more than 95% by weight. In particular, the meltblown nonwoven fabric consists of polyurethane fibers.

An advantage of the design of the nonwoven fabric as a meltblown nonwoven fabric is that forms a very homogeneous and dense structure, which also forms the predetermined elasticity, homogeneous in the entire layer. In addition, the dense structure leads to a high down density and tear resistance.

Due to the existing fiber structure, the air permeability can still be set to the desired values. Preferably, the insert has a tear strength, measured as a maximum tensile force in the longitudinal direction of 15 N to 60 N and in the transverse direction of 10 N to 60 N and / or a maximum tensile elongation at break of 100% to 400%. In this case, the tear resistance relates to the foam-coated nonwoven fabric without a carrier material optionally used for the production of the nonwoven fabric.

The mechanical properties of the nonwoven fabric can be further improved by downstream solidification, in particular thermal consolidation.

In a preferred embodiment of the invention, the meltblown nonwoven fabric is produced as a functional layer on a carrier material. This embodiment is not to be regarded as a laminate in the conventional sense, because it allows easy separability of meltblown nonwoven and substrate. The foam coating can then be applied in a particularly simple manner to the substrate stabilized by means of nonwoven material.

The support material preferably has a lower elasticity than the meltblown nonwoven fabric in at least one direction in order to be used in processes in which the material is processed with tensile stress, for. B. when applying the foam coating to allow easy handling. The carrier material can after application of the foam coating, for example, directly before connecting to the Outer material can be easily separated. The carrier material may be a nonwoven, woven, knitted, knitted or the like, preferably a spunbonded nonwoven, for example based on polyester, polyamide or polypropylene.

The proportion of melt-spun polyurethane fibers based on the total weight of the insert, without optional carrier material, is preferably between 30% by weight to 90% by weight, more preferably between 40% by weight and 80% by weight, most preferably between 50 % By weight and 70% by weight.

The insert of the present invention inherent high bi-elasticity allows a high level of comfort and high flexibility in the selection of the outer fabrics. It can be produced, in particular, with very low weight per unit area and yet has a good down-tightness, tear resistance and a sufficiently low lubricity, so that it is easy to process.

Particularly preferably, the insert, without any optional carrier material, a basis weight of 30 g / m ² to 90 g / m ² , preferably 40 g / m ² to 80 g / m ² , in particular 50 g / m ² to 70 g / m ² on.

The insert according to the invention allows excellent impermeability to down. Preferably, in a test of the insert according to the standard test method GB / T 12705.2-2009 "Textile - Methods of testing the down-proof properties of fabrics - Part 2 tumble test" a number of penetrated particles of not more than 15 not exceeded, more preferably of at most 10 and in particular of not more than 5.

The air permeability of the insert according to the invention measured according to DIN EN ISO 9237: 1995-12 is preferably in the range of 10 [dm ³ / s ^* m ² ] to 450 [dm ³ / s ^* m ² ], more preferably 50 [dm ³ / s ^* m ² ] to 350 [dm ³ / s ^* m ² ], in particular from 100 [dm ³ / s ^* m ² ] to 300 [dm ³ / s ^* m ² ]. This allows it to compress well, ensures a quick drying of the down filling, when it has become damp and a high level of comfort because sweat can be removed, but at the same time a heat effect is given.

Due to the use of polyurethane as fiber material, the insert according to the invention is readily dyeable and exhibits a low tendency to yellow on exposure to heat, aging and / or the action of light. The use of meltblown fibers in combination with the foam coating already allows a good coherence of the insert, so that can be dispensed with a thermal fusion of the fibers, for example with a structured calender roll. Due to this, the insert according to the invention can be produced with a very homogeneous surface which, in particular, has no shiny welding points. The use of polyurethane fibers in combination with the foam coating also allows good heat resistance.

In one embodiment of the invention, the foam coating has a hot melt adhesive distributed in it. Alternatively, the hotmelt adhesive can also be present on the foam coating, for example as a sprinkled powder layer and / or adhesive mass point. Hot melt adhesives have been known for a long time. Preferred hot melt adhesives are thermoplastic polymers such as copolyamides, copolyesters, polyethylene (PE), polypropylene (PP) and / or mixtures and / or copolymers thereof.

The melting point range of the hot melt adhesives is preferably 70-190 ° C, more preferably 80-150 ° C, still more preferably 90-130 ° C.

According to the invention, the hotmelt adhesive is particularly preferably co-polyamide or co-polyester. With these hotmelt adhesives, the insert can be bonded to outer fabrics with good release force. However, the insert according to the invention can also be connected to the outer fabric by sewing. It is advantageous in this embodiment that, unlike deposits associated with hot melt adhesive, the handle of the composite is not hardened.

It has been found that the special foam coating makes it possible according to the invention to be able to adjust the lubricity of the insert in such a way that an ideal value for the sewability can be achieved. In fact, the lubricity should not be too low for this purpose in order to ensure that the insert slides over the sewing foot of sewing machines and on the sewing needle.

Another advantage of the insert according to the invention is that it can be manufactured with a flat, homogeneous surface with a uniform thickness and can thus be processed with very light, transparent outer materials in a homogeneous appearance.

The proportion of foam coating on the insert may vary depending on the desired properties of the insert, for example, with regard to the respective desired elasticity. Practical tests have shown that deposits with a particularly good combination of softness and bi-elasticity can be obtained when the weight fraction of the foam coating on the insert in the range of 20 wt.% To 80 wt.%, Particularly preferably in the range of 70 wt % to 40% by weight, based in each case on the total weight of the insert without any carrier material present.

The layer thickness of the foam coating can be adjusted depending on the desired properties of the sheet. For most applications, it has proven to be favorable for the foam coating to set a mean layer thickness in the range of 5 to 400 .mu.m, preferably from 5 to 100 .mu.m and in particular from 10 to 50 microns. The layer thickness can be determined by electron microscopy.

The insert according to the invention has a soft, textile feel and good drapability even with a comparatively high amount of foam coating. In principle, the proportion of the foam coating can also be set to values higher than 80% by weight. In this case, however, losses in terms of tear resistance, textile character and softness of the nonwoven fabric must be accepted. The proportion of the foam coating can also be set below 20% by weight. Here, however, the down density, the bi-elasticity of the insert and their binding capacity for hot melt adhesive are reduced.

The higher the proportion of the foam coating, the lower the air permeability of the nonwoven fabric, which increases the heat insulating properties of the insert. An additional contribution to the heat effect is provided by entropy effects when stretching the foam coating, which generates heat.

Other functional properties, such as hydrophilic, water- or oil-repellent, thermoregulatory or flame retardant properties can be adjusted if desired, in a simple manner, for example by the use of additives known from the prior art which give these effects. Thermoregulatory properties can be adjusted, for example, with microencapsulated phase change materials, for example based on paraffins.

For the foam coating, vinyl acetate copolymers and / or polyacrylates and / or polyurethanes can be used.

The foam coating can be prepared in a conventional manner by foaming polymer dispersions or polymer emulsions, for example by mechanical impact, and applied by conventional application methods, for example coating methods.

An advantage of the use of vinyl acetate copolymers is that the resulting foam coatings in thermal processes such as ironing itself up to 140 ° C or when washing up to 60 ° C not or only so weakly stick together that the deposits can be separated again without destroying. In addition, vinyl acetate copolymers are simple and inexpensive to produce. Deposits made with them also have a particularly low yellowing tendency and show very little color pickup, i. a slight soiling with colorants that escape from other textiles during washing. In addition, the deposits show a particularly low shrinkage.

Preferred vinyl acetate copolymers are vinyl acetate-ethylene copolymers. These can be prepared, for example, by means of emulsion polymerization. According to the invention, the vinyl acetate copolymer is therefore preferably prepared starting from an aqueous vinyl acetate emulsion and / or vinyl acetate dispersion, in particular a vinyl acetate-ethylene emulsion and / or vinyl acetate-ethylene dispersion containing from 65 to 98% by weight of vinyl acetate. A vinyl acetate-ethylene emulsion and / or vinyl acetate-ethylene dispersion preferably contains 65 to 98% by weight of vinyl acetate and 2 to 30% by weight of ethylene, preferably 75 to 95% by weight of vinyl acetate and 5 to 25% by weight. % Ethylene in aqueous medium, based in each case on the total weight of the monomers.

Optionally, the vinyl acetate emulsion and / or vinyl acetate dispersion may contain up to 10 wt .-%, preferably 0.1 to 10 wt .-%, each based on the total weight of the monomers, other comonomers.

Suitable further comonomers for the vinyl acetate emulsion and / or vinyl acetate dispersion are, for example, those from the group of vinyl esters having 3 to 12 carbon atoms in the carboxylic acid radical such as vinyl propionate, vinyl laurate, vinyl esters of alpha-branched carboxylic acids having 8 to 11 carbon atoms. Also suitable are methacrylic esters or acrylic esters of unbranched or branched alcohols having 1 to 15 C atoms, such as methyl acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate, propyl acrylate, propyl methacrylate, n-butyl acrylate, n-butyl methacrylate, 2-ethylhexyl acrylate, norbornyl acrylate. Also suitable are vinyl halides such as vinyl chloride.

Other suitable comonomers are also ethylenically unsaturated mono- and dicarboxylic acids, preferably acrylic acid, methacrylic acid, fumaric acid and maleic acid; ethylenically unsaturated carboxylic acid amides and nitriles, preferably acrylamide and acrylonitrile; Mono- and diesters of fumaric acid and maleic acid, such as diethyl and diisopropyl esters, and also maleic anhydride, ethylenically unsaturated sulfonic acids or their salts, preferably vinylsulfonic acid, 2-acrylamido-2-methylpropanesulfonic acid. Further examples are precrosslinking comonomers such as polyethylenically unsaturated comonomers, for example di-vinyl adipate, diallyl maleate, allyl methacrylate or triallyl cyanurate, or post-crosslinking comonomers, for example acrylamidoglycolic acid (AGA), methyl acrylamidoglycolic acid methyl ester (MAGME), N-methylol acrylamide (NMA), N-methylol methacrylamide ( NMMA), N-methylolallyl carbamate, alkyl ethers such as the I sobutoxyether or esters of N-methylolacrylamide, of N-methylolmethacrylamide and of N-methylolallyl carbamate. Also suitable are monomers having hydroxyl or carboxyl groups, such as, for example, hydroxyethyl, hydroxypropyl or hydroxybutyl acrylate or methacrylate, and also 1,3-dicarbonyl compounds, such as acetoacetoxyethyl acrylate, acetoacetoxypropyl methacrylate, acetoacetoxyethyl methacrylate, acetoacetoxybutyl methacrylate, 2, 3-di (acetoacetoxy) propylmeth-polyacrylate and allyl acetoacetate.

The monomer is preferably selected such that the vinyl acetate copolymer, in particular the vinyl acetate-ethylene copolymer has a glass transition temperature Tg of -20 ° C to + 20 ° C, preferably from - 20 ° C to + 0 ° C, more preferably -20 ° C to -10 ° C.

The glass transition temperature Tg of the polymers can be determined in a known manner by means of DSC (differential thermal analysis, DIN EN ISO 11357-1 / 2 ). The Tg can also be approximated by the Fox equation. Tg values for homopolymers are listed in Polymer Handbook 2nd Edition, J. Wiley & Sons, New York (1975).

Very particular preference is given to using a vinyl acetate copolymer having the trade name Vinamul® Elite 25 from Celanese Emulsions.

Preferred polyacrylates are polybutyl acrylates, also referred to below as butyl acrylates. Butyl acrylates can also be prepared by emulsion polymerization. Preferably, the polyacrylate is thus prepared starting from a polyacrylate emulsion and / or polyacrylate dispersion, in particular a butyl acrylate emulsion and / or butyl acrylate dispersion containing preferably at least 40 wt .-%, preferably at least 50 wt .-%, more preferably at least 60% by weight of n-butyl acrylate or n-butyl methacrylate (in short n-butyl (meth) acrylate); preferred is n-butyl acrylate.

In addition to the abovementioned butyl acrylates, the polyacrylate emulsion and / or polyacrylate dispersion may contain further comonomers, preferably selected from C1 to C20 alkyl (meth) acrylates, vinyl esters of carboxylic acids containing up to 20 carbon atoms, vinyl aromatics having up to 20 carbon atoms, ethylenically unsaturated nitriles, vinyl halides, vinyl ethers of alcohols containing 1 to 10 C atoms, aliphatic hydrocarbons having 2 to 8 C atoms and one or two double bonds or mixtures of these monomers. To name a few are z. B. (meth) acrylic acid alkyl ester having a C 1 -C 10 alkyl radical, such as methyl methacrylate, methyl acrylate, ethyl acrylate and 2-ethylhexyl acrylate.

Particularly preferred comonomers are post-crosslinking comonomers, for example acrylamidoglycolic acid (AGA), methyl acrylamidoglycolic acid methyl ester (MAGME), N-methylol acrylamide (NMA), N-methylol methacrylamide (NMMA), N-methylolallyl carbamate, alkyl ethers, such as isobutoxy ether or esters of N-methyl -Olacrylamide, N-methylolmethacrylamide and N-methylolallyl carbamate.

The monomer is preferably selected so that the polyacrylate in particular the butyl acrylate has a glass transition temperature Tg of <-25 C, for example from -50 ° C to -25 ° C, preferably from -45 ° C to -25 ° C more preferably from -. 40 ° C to -25 ° C.

Very particular preference is given to using a polyacrylate having the trade name Appretan® N 92100 from the company Archroma.

An advantage of the use of polyacrylates is that they are inexpensive and still allow a good down leak.

For the foam coating can also be used a variety of polyurethanes. According to the invention, preference is given to aliphatic polyurethanes, since these have only a low tendency to yellow. Particularly preferred are polyester polyurethanes. Also particularly preferred are polyurethanes prepared from aqueous polymer dispersions. According to the invention, the preparation of the polyurethanes is particularly preferred

Implementation of

• a) at least one aliphatic or aromatic polyfunctional isocyanate,
• b) diols, of which b1) have 10 to 100 mol%, based on the total amount of the diols (b), a molecular weight of 500 to 5000, and
• b2) 0 to 90 mol%, based on the total amount of diols (b), have a molecular weight of 60 to 500 g / mol,
• c) monomers other than monomers (a), (b) having at least one isocyanate group or at least one isocyanate group-reactive group which further has at least one hydrophilic group or a potentially hydrophilic group, thereby causing the water-dispersibility of the polyurethanes; to a polyurethane in the presence of a solvent and

II. Subsequent dispersion of the polyurethane in water.

Particularly preferred are aliphatic isocyanates in which all isocyanate groups are bonded to an aliphatic chain.

Aliphatic isocyanates preferred according to the invention comprise from 4 to 12 carbon atoms. Preferred aliphatic isocyanates are tetramethylene diisocyanate, hexamethylene diisocyanate (1,6-diisocyanatohexane), octamethylene diisocyanate, decamethylene diisocyanate, dodecamethylene diisocyanate, tetradecamethylene diisocyanate, esters of lysine diisocyanate, tetramethylxylylene diisocyanate, trimethylhexane diisocyanate or tetramethylhexane diisocyanate; particularly preferred is 1,6-hexamethylene diisocyanate.

Aromatic isocyanates preferred according to the invention are: isophorone diisocyanate, tolylene diisocyanate, dicyclohexylmethane diisocyanate, phenylene diisocyanate, tolylene 2,4- and 2,6-diisocyanate, phenyl isocyanate, isocyanates of the diphenylmethane series, 1,5-naphthalene diisocyanate, p-chlorophenyl isocyanate, carbodiimidized triisopropylphenylene diisocyanate.

Preferred diols (b) are relatively high molecular weight diols (b1) which have a number average molecular weight (Mn) of about 500 to 5000, preferably about 700 to 3000 g / mol, particularly preferably 800 to 2500 g / mol.

The diols (b1) are according to the invention polyester polyols.

As diols (b), in addition to the diols (b1), it is also possible to use low molecular weight diols (b2) having a molecular weight of about 50 to 500, preferably from 60 to 200, g / mol.

The monomers (b2) used are, in particular, the synthesis components of the short-chain alkanediols mentioned for the preparation of polyester polyols, for example ethylene glycol, 1,2-propanediol, 1,3-propanediol, 1,1-dimethylethane-1,2-diol, 2- Butyl-2-ethyl-1,3-propanediol, 2-ethyl-1,3-propanediol, 2-methyl-1,3-propanediol, neopentyl glycol, hydroxypivalic acid neopentyl glycol ester, 1, 2, 1, 3 or 1, 4 Butanediol, 1, 6-hexanediol, 1, 10-decanediol, bis (4-hydroxycyclohexane) isopropylidene, tetramethylcyclobutanediol, 1, 2-, 1, 3- or 1, 4-cyclohexanediol, cyclooctanediol, norbornanediol, pinanediol, Decalin- diol , 2-ethyl-1,3-hexanediol, 2,4- Diethyl-octane-1,3-diol, hydroquinone, bisphenol A, bisphenol F, bisphenol B, bisphenol S, 2,2-bis (4-hydroxycyclohexyl) propane, 1, 1, 1, 2, 1, 3 and 1, 4-cyclohexanedimethanol, 1, 2, 1, 3 or 1, 4-cyclohexanediol, wherein the unbranched diols having 2 to 12 carbon atoms and an even number of carbon atoms and pentanediol-1, 5 and neopentyl glycol to be favoured.

In order to achieve the water-dispersibility of the polyurethanes, the polyurethanes in addition to the components (a) and (b) are preferably of the components (a) and (b) different monomers (c), the at least one isocyanate group or at least one isocyanate-reactive group and, in addition, at least one hydrophilic group or a group which can be converted into hydrophilic groups carry constructed. In the following text, the term "hydrophilic groups or potentially hydrophilic groups" is abbreviated to "(potentially) hydrophilic groups". The (potentially) hydrophilic groups react much more slowly with isocyanates than the functional groups of the monomers which serve to build up the polymer main chain. The (potentially) hydrophilic groups may be nonionic or, preferably, ionic, i. cationic or anionic, hydrophilic groups, or potentially ionic hydrophilic groups, and more preferably anionic hydrophilic groups, or potentially anionic hydrophilic groups.

Suitable nonionic hydrophilic groups are, for example, mixed or pure polyethylene glycol ethers of preferably 5 to 100, preferably 10 to 80, repeating units of ethylene oxide. The polyethylene glycol ethers may also contain propylene oxide units. If this is the case, the content of propylene oxide units should not exceed 50% by weight, preferably 30% by weight, based on the mixed polyethylene glycol ether.

The monomer is preferably selected such that the polyurethane, in particular the aliphatic polyurethane has a glass transition temperature Tg of 0 ° C to -65 ° C, preferably from -60 ° C to -20 ° C, more preferably from -55 ° C to -30 ° C. having.

Very particular preference is given to using a polyurethane with the trade name Tubicoat PUS from CHT R. BEITLICH GMBH.

The advantage of using a foam coating is that it is breathable and moisture-permeable, which has a positive effect on the wearing comfort. The pore structure of the foam coating also allows a uniform air circulation and a uniform air permeability.

In addition, the application of a foam coating over a conventional paste coating - which is usually applied by rotary screen printing or doctoring - generally offers several advantages.

Thus, the foam coating is significantly more cost-effective than the pure paste printing, since the share of raw materials is much lower with the same number of copies.

It is also advantageous that less penetration takes place through the insert. By contrast, a pure binder printing mixture penetrates significantly more into / through the insert.

According to a preferred embodiment of the invention, the foam coating has a pore structure in which more than 50% of the pores have a diameter, measured according to DIN ASTM E 1294, which is in the range from 1 to 100 μm, preferably from 5 to 30 μm.

The polymers of the foam coating can be chemically crosslinked or uncrosslinked. According to the invention, the polymers are at least partially crosslinked. Thus, the foam coating may have at least one crosslinker. By modulating the polymers of the foam coating with crosslinkers, the viscoelastic properties of the foam coating can be modulated in a targeted manner and withdrawal properties can be set. In addition, both the handle and the cleaning resistance can be selectively varied by the crosslinkers. Thus, through the use of crosslinking agents, a performance increase in the release force of a foam containing hot melt adhesive can be achieved, especially after washing or dry cleaning.

According to the invention, it has proved to be advantageous if the foam coating contains foaming agents, in particular surfactants.

It has also proved to be advantageous if the foam coating contains thickeners, in particular cellulose ethers, polyacrylates, polyacrylamides, polyethers or polyurethane thickeners.

Furthermore, it has proven to be advantageous if the foam coating contains handling agents, in particular silicones.

A further subject of the present invention is a process for producing the insert according to the invention comprising the following steps:

Producing and / or providing a meltblown nonwoven fabric comprising melt spun polyurethane meltblown fibers and applying a foam coating containing ethylene-vinyl acetate copolymer and / or polyacrylate and / or polyurethane to the nonwoven fabric.

The application of the foam coating on the nonwoven fabric can be carried out by a variety of application techniques known in the art. The foam coating is preferably applied to the nonwoven fabric in the form of a foamed water-based polymer dispersion or polymer emulsion. This may optionally contain other additives, such as the additives mentioned above.

Due to the foam structure, the formation of a completely closed film of the polymer dispersion can be avoided after drying. Depending on the method, the film formation can take place as a tension sail between the fibers, punctiform or even as a sheetlike film having pores.

The application of the foam coating is carried out according to the invention preferably by means of coating method, printing method, such as by rotary film printing with a printing stencil, or by means of impregnation.

After application of the foam coating, it is preferably cured, particularly preferably by heat treatment, at a temperature which is below the melting range or the decomposition temperature of the fiber. Preferably, the curing takes place for 15 s to 120 s at temperatures in the range of 60 ° C to 200 ° C.

The insert according to the invention can be provided with a hotmelt adhesive for fixing with outer fabrics. This can be done, for example, by applying the hot-melt adhesive, preferably in powder form, to the polymer dispersion so that a melt-adhesive-coated insert can be obtained without further coating step or that it is sprinkled on the foam coating as a powder. He can also be applied as an adhesive mass on the deposit.

However, according to the invention, the insert is sewn. For this purpose, the foam coating preferably has no coating with hot melt adhesive.

The outer fabric with which the insert is processed preferably has a weight of 50 g / m2 to 400 g / m2, more preferably less than 300 g / m2, most preferably less than 200 g / m2.

The invention also provides a down filled textile product, in particular selected from jacket, bedding, upholstery, mattress or sleeping bag, comprising a textile cover and down contained therein. The sheath comprises an inlay for preventing the leakage of the down as described above.

The wrapper is a textile ply having a suitable shape for keeping down in it. The textile casing could essentially consist of the insert, preferably in combination with an outer material. This means that the insert, in combination with the outer fabric, forms at least the part of the textile covering which will store the down and separate it from the environment. In addition, the textile cover may be modified for other purposes, for example, with decorative elements or closure means, such as buttons or zippers, be equipped.

The textile product is preferably a bedding, jacket, a cushion, a mattress or a sleeping bag. Particularly preferably, the textile product is a jacket. Because of the down-tightness in connection with the good mechanical properties and in particular the high softness and elasticity, the insert is in combination with an outer fabric but also as body pads or pads, such as duvets, pillows or mattress pads.

Another object of the invention is the use of the liner for preventing the leakage of down from a down filled textile product, in particular as a down-density lining in clothing and home textiles such as down jackets, bedding, sleeping bags. In addition to down, the filling may also contain other customary fillers, such as feathers or synthetic fillers. Down is often used for textile applications as blends with feathers. The proportion of down on the filling is preferably at least 30% by weight or at least 50% by weight, in particular at least 70% by weight.

In a preferred embodiment, the insert directly contacts the down filling. This means that there is no additional layer between the insole and the down.

It is preferred that the side of the insert with the foam coating directly adjacent to the down and thereby forms a barrier.

In the following the invention will be explained in more detail with reference to several examples.

In the examples, a meltblown nonwoven fabric containing meltblown meltblown polyurethane fibers of the following type is used: polyether-based thermoplastic aliphatic polyurethane having a Shore A hardness of 86 and a melting range of 160-175 ° C, spun at a moisture content of <0.1 % on a standard meltblown system.

Example 1: Production of a Sewable Insert According to the Invention by Spreading Method

413 g of an aqueous vinyl acetate polymer dispersion based on acrylamide, ethylene and N-methylolacrylamide (solids content 55%) are mixed with 318 g of an ammonium stearate-based foaming agent (solids content 30%) and 103 g of an emulsion based on a polyhydrogenmethylsiloxane (solids content 44%). and mixed with 12 g of water with stirring. The stated solids content is the proportion by weight which can be determined by evaporation of the liquid components by weighing.

The mixture is thickened with stirring with 154 g of a stock solution of methyl hydroxyethyl cellulose. To prepare the stock solution, 29.1 g of methyl hydroxyethyl cellulose (solids content 100%) are stirred into 970.9 g of water and allowed to swell at room temperature for 48 h. The viscosity of the stock batch is 50000-75000cp.

After addition of the stock mixture, the mixture is stirred. Thereafter, the mixture is foamed with a foam mixer to a foam to 2 liters.

The foam is applied with a 200 .mu.m doctor blade to a nonwoven consisting of melt-spun fibers of polyurethane with a basis weight of 40 g / m ² and dried in a convection oven for 15-90 s at 130 ° C-150 ° C. The result is a foam coating with basis weight of 25 g / sqm. The carrier material used for the nonwoven fabric is a polypropylene spunbonded nonwoven fabric having a basis weight of 20 g / m 2. Other carriers from which the nonwoven fabric can be detached non-destructively are also suitable.

The insert has a lubricity, which is well adapted for their sewing. The insert also has a soft handle and can be processed as a near insert with a variety of elastic and inelastic outer fabrics. In combination with the outer material, it has a good thermal effect.

Example 2: Production of a Sewable Insert According to the Invention by Spreading Methods

361 g of an aqueous polyurethane polymer dispersion based on a Polyesterurethans (solids content 49%) with 278 g of an ammonium stearate-based foaming agent (solids content 30%) and 90 g of an emulsion based on a Polyhydrogenmethylsiloxans (solids content 44%) and with 91 g of water Stirring mixed. The stated solids content is the proportion by weight which can be determined by evaporation of the liquid components by weighing.

The mixture is thickened with stirring with 270 g of a stock solution of methyl hydroxyethyl cellulose. To prepare the stock solution, 29.1 g of methyl hydroxyethyl cellulose (solids content 100%) are stirred into 970.9 g of water and allowed to swell at room temperature for 48 h. The viscosity of the stock batch is 50000-75000cp.

After addition of the stock mixture, the mixture is stirred. Thereafter, the mixture is foamed with a foam mixer to a foam to 2 liters.

The foam is applied with a 200 .mu.m doctor blade to a nonwoven consisting of melt-spun fibers of polyurethane with a weight of 30 g / m ² and dried in a circulating air oven at 130 ° C-150 ° C for 15-90 s. The result is a foam coating with basis weight of 27 g / sqm. As a carrier material for the nonwoven fabric, a spunbonded nonwoven made of polypropylene can be used with basis weight 20g / qm. Other carriers from which the nonwoven fabric can be detached non-destructively are also suitable. The insert can be processed as a sewing inlay with outer fabrics.

Example 3 Production of a Sewable Insert According to the Invention by Brushing Methods

413 g of an aqueous vinyl acetate polymer dispersion based on acrylamide, ethylene and N-methylolacrylamide (solids content 55%) are mixed with 318 g of an ammonium stearate-based foaming agent (solids content 30%) and 103 g of an emulsion based on a polyhydrogenmethylsiloxane (solids content 44%). and mixed with g of water while stirring. The stated solids content is the proportion by weight which can be determined by evaporation of the liquid components by weighing. The mixture is thickened with stirring with 154 g of a stock solution of methyl hydroxyethyl cellulose. To prepare the stock solution, 29.1 g of methyl hydroxyethyl cellulose (solids content 100%) are stirred into 970.9 g of water and allowed to swell at room temperature for 48 h. The viscosity of the stock batch is 50000-75000cp.

After addition of the stock mixture, the mixture is stirred. Thereafter, the mixture is foamed with a foam mixer to a foam to 2 liters.

The foam is applied with a 200 .mu.m doctor blade to a nonwoven consisting of melt-spun fibers of polyurethane with a weight of 50 g / m ² and dried in a circulating air oven at 130 ° C-150 ° C for 15-90 s. The result is a foam coating with basis weight of 15 g / sqm. As a carrier material for the nonwoven fabric, a spunbonded nonwoven made of polypropylene can be used with basis weight 20g / qm. Other carriers from which the nonwoven fabric can be detached non-destructively are also suitable. The insert can be processed as a sewing inlay with outer fabrics.

Example 4: Production of a fixable insert according to the invention by means of a coating method

413 g of an aqueous vinyl acetate polymer dispersion based on acrylamide, ethylene and N-methylolacrylamide (solids content 55%) are mixed with 318 g of an ammonium stearate-based foaming agent (solids content 30%) and 103 g of an emulsion based on a polyhydrogenmethylsiloxane (solids content 44%). with 130 g of a Schmelzklebstoffpuders based on a polyurethane (solids content 100%) with melting point 110 ° C (+/- 10 ° C) and mixed with 12 g of water with stirring. The stated solids content is the proportion by weight which can be determined by evaporation of the liquid components by weighing.

The mixture is thickened with stirring with 154 g of a stock solution of methyl hydroxyethyl cellulose. To prepare the stock solution, 29.1 g of methyl hydroxyethyl cellulose (solids content 100%) are stirred into 970.9 g of water and allowed to swell at room temperature for 48 h. The viscosity of the stock batch is 50000-75000cp.

After addition of the stock mixture, the mixture is stirred. Thereafter, the mixture is foamed with a foam mixer to a foam to 2 liters.

The foam is applied with a 200 .mu.m doctor blade to a nonwoven consisting of melt-spun fibers of polyurethane with a basis weight of 45 g / m ² and dried in a circulating air oven at 130 ° C-150 ° C for 15-90 s. The result is a foam coating with basis weight of 20 g / sqm. As a carrier material for the nonwoven fabric, a spunbonded nonwoven made of polypropylene can be used with basis weight 20g / qm. Other carriers from which the nonwoven fabric can be detached non-destructively are also suitable. The insert can be processed as a sewing inlay with outer fabrics.

Example 5 Production of a Sewable Insert According to the Invention by means of Foam Impregnation

On a nonwoven fabric consisting of melt-spun fibers of polyurethane with a basis weight of 50 g / m ² without carrier material is impregnated with a foam mixture. The foam mixture consists of 113 g of water, 194 g / l of an aqueous polymer dispersion based on an acrylic copolymer (solids content 45%), 4 g / l of a wetting agent based on a Diisooctylnatriumsulfosuccinats (solids content 71%), 2 g / l of a wetting agent based on a alkanesulfonate sodium salt (solids content 70%), 7 g / l of a lubricant based on a Sillikonöls (solids content 40%) and 680 g / l of a phase change material based on paraffin (octadecane) (solids content 45%). Dry the wet web in a belt dryer at 20-60s at 150-180 ° C. The result is a film with basis weight of 55 g / sqm. The nonwoven fabric can be processed as a close-up padding with outer fabrics.

Example 6 Production of a Hotmelt-Adhesive Fixable Insert According to the Invention

The insert produced according to 2) are applied in rotary film printing with a 3.5 g (solids) of a printing paste consisting of 343 g of water, 608 g / l of an aqueous polymer dispersion based on a polyesterurethane (solids content 49%), 8 g / l of an antifoam Basis of an emulsion polydimethylsiloxane / excipient (solids content 33%), 10 g / l of an emulsifier based on nonionic surfactants (solids content 83%), 19 g / l of a running aid based on polyethylene glycol (solids content 100%), 2 g / l ammonia 25% -ig and 10 g / l of a thickener based on a preparation of polyacrylate (solids content 80%) by means of perforated mesh stencil dot-printed (CP 180) and then with 5 g of a co-polyamide melt adhesive powder with the melting range 75-135 ° C. sprinkled and dried for 30-60s at 180 ° C in the dryer.

Comparative Example 1: Down-density insert, fabric, stable according to the prior art Weight per unit area 57 g / m ²

Examination of relevant parameters of deposits according to the invention

down proof

The feather seal is tested according to the Chinese standard test method GB / T 12705.2-2009 "Textile - Methods of testing the down-proof properties of fabrics - Part 2 tumble test" Table 6: Down-leak according to GB / T 12705.2-2009 (tumble) before washing Filling: 90% down, 10% feathers Number of penetrating particles Insert according to Example 1 4 Insert according to example 2 3 Insert, stable from Comparative Example 1 4

A number of penetrated particles of less than 15 are considered acceptable. It has been found that the inserts according to the invention have a comparably good down-impermeability like the down-density fabric of Comparative Example 1. However, they are much less smooth, which facilitates their processability.

II. Tensile elastic behavior, maximum tensile strength, maximum elongation at break

The test of the maximum tensile strength and the maximum tensile elongation at break as a measure of the tensile strength takes place after DIN EN 29073-03: 1992 with the following variables: tensile direction: longitudinal direction, transverse direction of the textile Testing device: Zwick, type BZ 1.0 / TH1S. Table 1: Maximum tensile strength (HZK) and maximum tensile strength (HZD) HZK HZD [N] [%] inlay according to Example 1 along 25.94 305.15 crosswise 17,76 288.35 Insert according to example 2 along 20,06 282.48 crosswise 13.71 240.94 Insert, stable from Comparative Example 1 along 464.38 18.14 crosswise 145.21 10.47

The results listed in Table 1 show that the insert of Example 1 according to the invention has a high maximum tensile elongation at good maximum tensile strength values. The insert of Comparative Example 1 shows in longitudinal and transverse direction a much lower maximum tensile force and thus can be considered as less elastic or stable.

• Zugrichtung: Längsrichtung, Querrichtung des Textils
• Probenlänge: 150 mm
• Probenbreite: 50 mm
• Freie Einspannlänge: 100 mm
• Prüfgerät: Fa. Zwick, Typ BZ 1.0/TH1S.
• Vorkraft: 0,05 N
• Zyklen: 5
• Geschwindigkeit pro Zyklus: 50 mm/min.
  • 1) Oberer Umkehrpunkt: 25 % Dehnung
  • 2) Unterer Umkehrpunkt: 0,05 N Kraft
• Prüfklima: 22 °C/ 50 % rel. Feuchte

The examination of the zugelastischen behavior takes place on the basis of DIN 53835-2: 1981-08 as hysteresis measurement with the following variables:

• Pull direction: longitudinal direction, transverse direction of the textile
• Sample length: 150 mm
• Sample width: 50 mm
• Free clamping length: 100 mm
• Testing device: Zwick, type BZ 1.0 / TH1S.
• Pre-load: 0.05 N
• Cycles: 5
• Speed per cycle: 50 mm / min.
  • 1) Upper reversal point: 25% elongation
  • 2) Lower reversal point: 0.05 N force
• Test climate: 22 ° C / 50% rel. humidity

The measurement results are shown in Table 2. Table 2: Tensile behavior Permanent stretching Residual expansion 9 Module 5% Module 10% Module 15% Module 20% Module 25% [%] [%] [N] [N] [N] [N] [N] inlay according to Example 1 along 6.55 5.27 2.10 2.96 3.69 4.32 4.81 crosswise 6.88 5.67 1.16 1.90 2.46 2.90 3.34 Insert according to example 2 along 6.19 4.77 2.53 3.69 4.53 5.15 5.59 crosswise 7.15 5.56 2.03 2.89 3.49 3.91 4.13 Insert, stable (Comparative Example 1) along 0 0 0 0 0 0 0 crosswise 0 0 56.86 0 0 0 0

The insert of Comparative Example 1 shows no elastic behavior. It can therefore be considered as little elastic or stable. The insert according to the invention according to Example 1 and 2, however, shows a tolerable behavior. It can be stretched non-destructively in the longitudinal and transverse directions up to the upper reversal point of 25% elongation and has a residual elongation of less than 10% and a permanent elongation of less than 12%.

III. Air permeability

• Prüfdruck: 200 Pa
• Prüfergebnis: in dm³/s^*m²
• Prüfgerät: Textex FX 3300
• Probenbreite: 10 cm

The test of air permeability is based on DIN EN ISO 9237: 1995-12 with the following differences:

• Test pressure: 200 Pa
• Test result: in dm ³ / s ^* m ²
• Tester: Textex FX 3300
• Sample width: 10 cm

The standard climate is according to DIN 50014 / ISO 554 :
The air permeability is determined at a test pressure of 200 Pa. The insert is not sewn and tested after sewing with the outer fabric. The measurement takes place after removal of the carrier material from the nonwoven fabric. The lower the resulting reading of the air permeability, the higher the heat effect of the composite outer fabric / liner. Table 3: Air permeability Air permeability [dm ³ / s ^* m ² ] Outer fabric 1, without insert 915 Insert according to Example 1 129 Insert according to example 2 136 Insert according to Comparative Example 1 15 Outer fabric 1, with insert after 252 Sewn Example 1 Outer fabric 1, sewn with insert according to Example 2 103 Outer fabric 1, sewn with insert stable (Comparative Example 1)

Table 3 shows that with the insert according to the invention in combination with the outer fabric a reduced air permeability and thus an improved thermal effect of the composite outer fabric / insert results.

IV. Dimensional change / shrinkage

The shrinkage was measured after DIN EN ISO 5077: 2008-04 With DIN EN ISO 3759: 2011-08 and DIN EN ISO 6330: 2012 , It is washed once at 40 ° C. Table 4: dimensional change / shrinkage Dimensional change direction Longitudinal [%] Cross [%] Insert according to Example 1 0 -1.0 Insert according to example 2 0 -2.0 Insert according to Comparative Example 1 0 +2.0

Table 4 shows that the shrinkage of the inserts according to the invention according to Example 1 and 2 is very low. This is surprising insofar as the use of thermoplastic fibers and a Foam coating based on vinyl acetate copolymers and / or polyacrylates and / or polyurethanes, which have a low softening and / or glass transition temperature, an increased shrinkage behavior would have been expected in laundry. The insert of Comparative Example 1 without components with low softening and / or glass transition temperature has, as expected, a low shrinkage.

separating force

To test the bondability during heat treatment, two layers of the inserts are laid on top of one another and between a release paper with a fixing press type Multistar DX 1000 / C / T / TA of Kannegiesser 12s at a temperature of 120 ° C and a pressure of 0.5 bar and Fixed at a speed of 5.7 m / min.

Thereafter, the release force of the composite insert / insert is determined.

• Zugrichtung: Längsrichtung des Textils
• Probenlänge: 150 mm
• Probenbreite: 50 mm
• Einspannlänge: 150 mm
• Messweg: 100 mm
• Prüfgerät: Fa. Zwick, Typ BZ 1.0/TH1S.
• Vorkraft: 0,1 N
• Prüfgeschwindigkeit: 150 mm/min.
• Prüfklima: 22 °C/ 50 % rel. Feuchte

The check of the separation force takes place after DIN 54310: 1980-07 with the following variables:

• Drawing direction: longitudinal direction of the textile
• Sample length: 150 mm
• Sample width: 50 mm
• Clamping length: 150 mm
• Measuring path: 100 mm
• Testing device: Zwick, type BZ 1.0 / TH1S.
• Pre-load: 0.1 N
• Test speed: 150 mm / min.
• Test climate: 22 ° C / 50% rel. humidity

The higher the test value of the release force, the stronger the insert is thermally bonded in the action of temperature. A gap value with demolition of the sample means a complete bond that can not be separated without destroying it. With a mean value without demolition a nondestructive separability is given. Table 5: Release force separating force [N] Insert according to Example 1 0.2 (mean) Insert according to example 2 0.8 (mean)

The results of Table 5 show that the insert according to the invention according to Example 1 adheres only weakly at the indicated temperature influence, so that it can be separated again without destruction

This is surprising insofar as the use of thermoplastic polyurethane fibers and a foam coating based on vinyl acetate copolymers and / or polyacrylates and / or polyurethanes which have a low softening and / or glass transition temperature, an increased tendency to stick during thermal treatment would have been expected.

VI. Glass transition temperature Tg

Tester: DSC 1 (Mettler Toledo)

Heating rate (K / min): 10

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• JP 2008303480 A [0018]
• JP 2006291421 A [0018]

Cited non-patent literature

• DIN EN ISO 9237: 1995-12 [0008, 0047, 0139]
• DIN 12934 [0011]
• GB / T 12705.2-2009 "Textile - Methods of testing the down-proof properties of fabrics - Part 2 tumble test" [0013, 0046, 0132]
• DIN EN ISO 11357-1 / 2 [0067]
• DIN EN 29073-03: 1992 [0134]
• DIN 53835-2: 1981-08 [0136]
• DIN 50014 / ISO 554 [0140]
• DIN EN ISO 5077: 2008-04 [0142]
• DIN EN ISO 3759: 2011-08 [0142]
• DIN EN ISO 6330: 2012 [0142]
• DIN 54310: 1980-07 [0146]

Claims (15)

Bi-elastic insert comprising a meltblown nonwoven fabric comprising melt-spun meltblown polyurethane fibers, characterized in that the nonwoven fabric has on at least one side a foam coating containing vinyl acetate copolymer and / or polyacrylate and / or polyurethane. Deposit after Claim 1 , characterized in that the weight fraction of the melt-spun polyurethane fibers based on the total weight of the insert between 30 wt.% To 90 wt.% Is. Deposit after Claim 1 or 2 , characterized in that the weight fraction of the foam coating in the range of 20 wt.% To 80 wt.% Based on the total weight of the insert. Insert according to one or more of the preceding claims, characterized in that the insert has a basis weight of 30 g / m ² to 90 g / m ² . Insert according to one or more of the preceding claims, characterized in that the polyurethane meltblown fibers have a titer below 1 dtex. Insert according to one or more of the preceding claims, characterized in that the vinyl acetate copolymer is a vinyl acetate-ethylene copolymer. Insert according to one or more of the preceding claims, characterized in that the vinyl acetate copolymer has a glass transition temperature Tg of -20 ° C to + 20 ° C. Insert according to one or more of the preceding claims, characterized in that the vinyl acetate copolymer and / or polyacrylate and / or polyurethane is at least partially crosslinked. Insert according to one or more of the preceding claims, characterized by a shrinkage of less than 5%. Insert according to one or more of the preceding claims, characterized in that the foam coating has a pore structure in which more than 50% of the pores have a diameter, measured according to DIN ASTM E 1294, which is in the range of 1 to 100 microns. Insert according to one or more of the preceding claims, characterized by an air permeability, measured according to DIN EN ISO 9237: 1995-12, in the range from 10 [dm ³ / s ^* m ² ] to 450 [dm ³ / s ^* m ² ]. Insert according to one or more of the preceding claims, characterized in that the foam coating has an average layer thickness in the range of 5 to 400 microns. Insert according to one or more of the preceding claims, characterized in that the insert is designed as a proximity insert. Process for producing a liner according to one or more of the preceding claims, comprising the following steps: a. Producing and / or providing a meltblown nonwoven fabric comprising melt spun polyurethane meltblown fibers; b. Applying a foam coating containing ethylene-vinyl acetate copolymer and / or polyacrylate and / or polyurethane, on the nonwoven fabric. Down filled textile product, in particular selected from jacket, bedding, upholstery, mattress or sleeping bag, comprising a textile cover and down included therein, characterized in that the cover comprises an insert according to one or more of Claims 1 - 13 for preventing the leakage of the down.