WO2018145935A1 - Bi-elastic down-proof non-woven insert - Google Patents

Abstract

The invention relates to a bi-elastic insert comprising a melt-blown non-woven material containing melt-spun melt-blown polyurethane fibers, the non-woven material being coated on at least one face with foam that contains vinyl acetate copolymer and/or polyacrylate and/or polyurethane. The insert can be produced to have a low weight per unit area and to be yet down-proof, as well as to have the air permeability and tear resistance required for good wear and performance characteristics.

Description

 Bi-elastic down density nonwoven insert Description

The present invention relates to a bi-elastic insert that can be made with a light basis weight and yet simultaneously

Featherproof and has a good carrying and performance properties required air permeability and tear resistance. 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. Deposits are commonly used in the manufacture of clothing

Outer fabrics processed to achieve a shaping of the garment. They form the "framework" of the garment, and are usually made up of nonwovens, woven fabrics or textile surfaces, usually knitted fabrics

Outer fabric, which is mostly woven or formed from stitches, sewn and / or glued.

According to their deformation behavior, a distinction is made between stable, mono-elastic and bi-elastic inserts. While stable inserts deform irreversibly when stretched, mono-elastic inserts are characterized by a reversible deformation behavior in one direction (longitudinal or longitudinal) Transverse direction). Bi-elastic inserts are made by a reversible

Deformation behavior in both directions (longitudinal and transverse) characterized. 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 the DIN 53835-2: 1981 -08. The insert is usually well adapted to most bi-elastic outer fabrics in their formability when they in a test of elastic behavior according to DIN 53835-2: 1981 -08 in longitudinal and

Non-destructive up to an upper reversal point of

has 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 fabric one

thermal process, such as ironing or washing suspended, then the deposit should not at all or only so weakly stick together, so that a non-destructive 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 inserts whose air permeability measured in accordance with DIN EN ISO 9237: 1995-12 is in the range of at least 20

[dm ³ / sm ² ] is up to 450 [dm ³ / sm ² ]. Another advantage of adjusting the air permeability to the above values is that trapped air can escape sufficiently quickly in compression, so that at

Compression does not come to a balloon effect. 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 / sm ² ], it is possible to inject down with air into the insert without a balloon effect occurring.

An air permeability of less than 20 [dm ³ / sm ² ] can cause the down filling, after it has become moist, to dry only poorly. 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 / sm 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. In the case of higher air permeability values, the tightness is usually insufficient to ensure a sufficient down-density or

To ensure down migration resistance. Down, also known as lower springs, are feathers with short keel and 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 that the downs will not pierce through the covers and / or get out

(Migrate). Since duvets of down are pointed and hard, the casings must have a high tear resistance. The term "down" is used in the

For the purposes of this invention, refers to down feathers (bottom feathers) of birds which are suitable for textile fillings. A definition of down is given in DIN 12934. 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 connection with heat-insulating

Properties are used down for a variety of textile applications.

Down migration refers to the penetration of down or feather particles through the outer fabric during manual use in textiles with fillings that contain all or part of down, in particular surface friction, such as when wearing, washing or chemically

Cleaning the garment results. 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" 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 are not in with elastic outer fabrics

satisfactorily processable, since 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 are only high

Effort at low production speeds, high costs and quality problems can be produced. It must be very fine

Yarns / filaments are 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, which consist of nonwovens, can also be in small

Weigh area weights well and wrinkle free and may be due to their structure without the problems mentioned. Very light nonwovens are usually made of staple fibers or very fine

Staple fibers produced with titers less than 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, JP2008 / 303480A proposes to use a composite material of a fabric with a nonwoven fabric. Also, JP2006 / 291421 A discloses down-density laminates containing thermally bonded nonwoven fabrics. 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. Object of the present invention is a bi-elastic insert

to provide, which can be prepared in a simple manner and which is well adapted to most bi-elastic outer fabrics in their formability and has a good or at least acceptable down leak 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 be well adapted for processing

Have 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 on at least one side

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 a 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 even at low basis weights

Downtime on. 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 be used for good wearing and usage properties

have required air permeability. Finally, the

Use of polyurethane in combination with those for

 Foam coating polymers used a soft handle and in conjunction with the outer fabric 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 because 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, each containing polymers with low softening and / or glass transition temperature, rather an increased shrinkage behavior would have been expected. It is believed that the low shrinkage tendency on the

stabilizing effect of the foam coating is due to stabilizing the fibers at least superficially by gluing. These

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 produced as a close-pad and not using a conventional hot melt adhesive as a fuser insert, despite the use of fibers and foam coatings, each containing polymers with low softening and / or glass transition temperature, in thermal processes such as ironing to 1 10 ° C or when washing at 40 ° C or only weakly stick together, that they can be separated again non-destructive.

Next, it was surprisingly 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 fabric and assume its structure. The structure of the outer material is transferred to the Deposits and stands out on her. 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, there are the

Polyurethane fibers of polyurethane, which may contain conventional additives. 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 above 1 20 ° C, preferably from 1 60 ° C to 1 75 ° 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, nonwovens of fibers spun directly from polymer melts passing through nozzles and drawn through hot air streams until they are broken are formed by immediate deposition. 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 mean fiber diameter of the fibers is

preferably at less than 1 μηπ (microns), in particular less than 0.5 [im, for example, between 0.1 μηπ to 1 μηπ. For the purposes of the present invention, the determination of the mean fiber diameter of optical measuring methods, in particular a picture-analytical evaluation of images with a scanning electron microscope (SEM images), went out. This includes a statistically valid analysis method for reproducible, objective and therefore representative statements about

Fiber diameter and its 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 leak 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 force strain from 100% to 400%. This refers to the

Tear strength on the foam-coated nonwoven fabric without an optionally used for the production of the nonwoven fabric carrier material. The mechanical properties of the nonwoven fabric can through

downstream hardening, in particular thermal hardening be further improved.

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 applying the foam coating

be separated, for example, directly before bonding with the outer fabric in a simple manner. 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

penetrated particles of not more than 15 not exceeded, more preferably of at most 10 and in particular of at most 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 a 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. Hotmelt adhesives have been around for a long time known. 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. In this embodiment is advantageous that, in contrast to

Hot melt bonded deposits the handle of the composite is not hardened.

It was found that the special foam coating it

According to the invention allows to adjust the lubricity of the insert to the effect 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 insoles with a particularly good combination of softness and bi Elasticity can be obtained if 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 wt.%, Each based on the total weight of the liner without, where appropriate available

Carrier material is located.

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 beneficial for the

Foam coating an average layer thickness in the range of 5 to 400 μηπ, preferably from 5 to 100 μηπ and in particular from 10 to 50 μηπ

adjust. 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. Here, however, must

Losses in terms of tear strength, textile character and softness of the nonwoven fabric are accepted. The share of

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, 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, if desired, in a simple manner, for example, by the use of additives known in the art, which give these effects can be adjusted. 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 of polymer dispersions or polymer emulsions, for example by mechanical impact and by conventional

Application methods, such as brushing are applied. 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 pick-up, 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. 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, in each case based 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 1 C 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

Maleic anhydride, ethylenically unsaturated sulfonic acids or salts thereof, 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, methacrylic acid and acrylic acid hydroxyalkyl esters, such as hydroxyethyl,

Hydroxypropyl or hydroxybutyl acrylate or methacrylate and 1,3-dicarbonyl compounds such as acetoacetoxy-ethyl acrylate,

Acetoacetoxypropyl methacrylate, acetoacetoxyethyl methacrylate,

Acetoacetoxybutyl methacrylate, 2, 3-di (acetoacetoxy) propylmeth-polyacrylate and allyl acetoacetate.

The monomer is preferably selected so that the vinyl acetate copolymer in particular the vinyl acetate-ethylene copolymer a

Glass transition temperature Tg of -20 ° C to + 20 ° C, preferably from - 20 ° C to + 0 ° C more preferably from

-20 ° C to -10 ° C.

The glass transition temperature Tg of the polymers can be determined in a known manner by means of DSC (Dynamic Differential Thermal Analysis, DIN EN ISO 1 1357-1 / 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 particularly preferred is a vinyl acetate copolymer with 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 by means of

Emulsion polymerization are prepared. Preference is given to the polyacrylate 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 .-%, particularly preferably at least 60% by weight of n-butyl acrylate or n-butyl methacrylate (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 acrylamido glycolic 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 oleol acrylamide, N-methylol methacrylamide 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 a polyacrylate having the trade name

Appretan® N 92100 from the company Archroma used.

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

I. Reaction of a) at least one aliphatic or aromatic polyfunctional isocyanate, b) diols, of which b1) 10 to 100 mol%, based on the total amount of the diols (b), have a molecular weight of 500 to 5000, and

b2) 0 to 90 mol%, based on the total amount of the diols (b), a

Have 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

Lysindiisocyanates, tetramethylxylylene diisocyanate, trimethylhexane diisocyanate or tetramethylhexanediisocyanate, 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 5,000,

preferably from about 700 to 3000 g / mol, more 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 above all the synthesis components of the short-chain alkanediols mentioned for the preparation of polyester polyols

used, 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, decalinediol, 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 are preferred.

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 - usually in the

 Rotary screen printing method or by means of doctor blade method is applied - generally different advantages.

So the foam coating is much more cost-efficient than the pure

Paste printing, since the share of raw materials is much lower for 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 on 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 μηπ, preferably from 5 to 30 μηπ. 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

Foam coating with crosslinkers can be the viscoelastic

Properties of the foam coating can be modulated specifically and

Deduction behavior can be adjusted. In addition, through the

Crosslinking both the handle and the cleaning resistance can be selectively varied. Thus, through the use of crosslinkers one

Performance improvement of the release force of a hot melt adhesive-containing foam can be achieved especially after washing or dry cleaning.

According to the invention it has proved to be advantageous if the

Foam coating foaming agent, in particular surfactants containing.

It has likewise proved to be advantageous if the foam coating comprises thickeners, in particular cellulose ethers, polyacrylates, polyacrylamides,

Contains polyether or polyurethane thickener.

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. Preferably, the foam coating is in the form of a

foamed water-based polymer dispersion or polymer emulsion applied to the nonwoven fabric. 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 as

Adhesive mass point are applied to the insert. 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 relates to a down filled textile product, in particular selected from jacket, bedding, upholstery, mattress or

Sleeping bag, comprising a textile cover and down included therein. The sheath comprises an insert as described above for preventing the

Leakage of down. 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 casing can be modified for other purposes, for example with decorative elements or

Locking devices, 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 in combination with an outer fabric but also as

Body pads or pads, such as comforters, 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

Mixtures with feathers used. 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 contacts the

Down filling immediately. 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 with a Shore A hardness of 86 and a melting range of 1 60 - 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 means of

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 a Ammonium stearate-based foaming agent (solids content 30%) and 1 03 g of an emulsion based on a Polyhydrogenmethylsiloxans (solids content 44%) and with 1 2 g of water mixed with stirring. The stated solids content is the proportion by weight which, after evaporation of the liquid components by

Weighing can be determined.

The mixture is thickened under stirring with 1 54 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.

auf einen Vliesstoff bestehend aus schmelzgesponnenen Fasern aus Polyurethan mit Flächengewicht 40 g/m² aufgebracht und in einem Umluftofen 1 5-90 s bei 1 30°C-1 50°C getrocknet. Es entsteht eine Schaumbeschichtung mit Flächengewicht von 25 g/qm. Als Trägermaterial für den Vliesstoff wird ein Spinnvliesstoff aus Polypropylen verwendet mit Flächengewicht 20g/qm. Auch andere Träger, von denen der Vliesstoff zerstörungsfrei ablösen lässt, sind geeignet. The foam comes with a

applied to a nonwoven consisting of melt-spun fibers of polyurethane with a weight of 40 g / m ² and dried in a convection oven 1 5-30 s at 1 30 ° C-1 50 ° 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 as

Sewing insert with a variety of elastic and inelastic

Outer fabrics are processed. In combination with the outer material, it has a good thermal effect. Example 2 Production of a Sewable Insert According to the Invention by means of

coating process 361 g of an aqueous polyurethane polymer dispersion based on a

Polyesterurethane (solids content 49%) are mixed 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 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 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.

auf einen Vliesstoff bestehend aus schmelzgesponnenen Fasern aus Polyurethan mit Flächengewicht 30 g/m² aufgebracht und in einem Umluftofen 15-90 s bei 130°C-150°C getrocknet. Es entsteht eine Schaumbeschichtung mit Flächengewicht von 27 g/qm. Als Trägermaterial für den Vliesstoff kann ein Spinnvliesstoff aus Polypropylen verwendet werden mit Flächengewicht 20g/qm. Auch andere Träger, von denen der Vliesstoff zerstörungsfrei ablösen lässt, sind geeignet. Die Einlage kann als Näheinlage mit Oberstoffen verarbeitet werden. The foam comes with a

applied 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 means of

coating process 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, after evaporation of the liquid components by

Weighing can be determined. The mixture is thickened with stirring with 154 g of a stock solution of methyl hydroxyethyl cellulose. to

Preparation of the stock mixture, 29.1 g of methyl hydroxyethyl cellulose (solids content 100%) are stirred into 970.9 g of water and allowed to swell for 48 h at room temperature. 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.

auf einen Vliesstoff bestehend aus schmelzgesponnenen Fasern aus Polyurethan mit Flächengewicht 50 g/m² aufgebracht und in einem Umluftofen 15-90 s bei 130°C-150°C getrocknet. Es entsteht eine Schaumbeschichtung mit Flächengewicht von 15 g/qm. Als Trägermaterial für den Vliesstoff kann ein Spinnvliesstoff aus Polypropylen verwendet werden mit Flächengewicht 20g/qm. Auch andere Träger, von denen der Vliesstoff zerstörungsfrei ablösen lässt, sind geeignet. Die Einlage kann als Näheinlage mit Oberstoffen verarbeitet werden. Beispiel 4: Herstellung einer erfindungsgemäßen fixierbaren Einlage mittels The foam comes with a

applied to a nonwoven consisting of melt-spun fibers of polyurethane with a weight of 50 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 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

 coating process

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 hot melt adhesive powder based on a polyurethane (solids content 100%) with melting point 1 10 ° C (+/- 10 ° C) and with 1 2 g of water mixed with stirring. The stated solids content is the proportion by weight, which after

Evaporation of the liquid components can be determined 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.

auf einen Vliesstoff bestehend aus schmelzgesponnenen Fasern aus Polyurethan mit Flächengewicht 45 g/m² aufgebracht und in einem Umluftofen 15-90 s bei 130°C-150°C getrocknet. Es entsteht eine Schaumbeschichtung mit Flächengewicht von 20 g/qm. Als Trägermaterial für den Vliesstoff kann ein Spinnvliesstoff aus Polypropylen verwendet werden mit Flächengewicht 20g/qm. Auch andere Träger, von denen der Vliesstoff zerstörungsfrei ablösen lässt, sind geeignet. Die Einlage kann als Näheinlage mit Oberstoffen verarbeitet werden. Beispiel 5: Herstellung einer erfindungsgemäßen nähbaren Einlage mittels Schaumimprägnierung The foam comes with a

applied 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 consisting of melt spun fibers

Polyurethane with basis weight 50 g / m ² without carrier material is impregnated with a foam mixture. The foam mixture consists of 1 13 g

Water, 194 g / l of an aqueous polymer dispersion based on a Acrylic copolymers (solids content 45%), 4 g / l of a wetting agent based on a diisooctylsodium sulfosuccinate (solids content 71%), 2 g / l of a wetting agent based on an alkanesulfonate sodium salt (solids content 70%), 7 g / l of a

Lubricant based on a syllabic oil (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-shaped 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 I. Downtime

The examination of the feathers is done according to the Chinese

 Standard Test Method GB / T 12705.2-2009 "Textile - Methods of Testing - The Part of Tumble Test"

Table 6: Down-leak according to GB / T 12705.2-2009 (tumble) before washing

 Filling: 90% down, 10% feathers

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 is carried out according to 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 / TH1 S. Table 1: Maximum tensile strength (HZK) and maximum tensile strength (HZD)

The results listed in Table 1 show that the insert of the invention according to Example 1, a high maximum tensile elongation at good

 Has 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. The testing of the elastic behavior is based on DIN 53835-

2: 1981 -08 as a 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 / TH1 S.

 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

Die Einlage aus Vergleichsbeispiel 1 zeigt kein zugelastisches Verhalten. Sie kann damit als wenig elastisch bzw. stabil angesehen werden. Die

The insert of Comparative Example 1 shows no elastic behavior. It can therefore be considered as little elastic or stable. The

 Inventive insert according to Example 1 and 2, however, shows a

 too elastic behavior. It can be in the longitudinal and transverse direction

non-destructively up to the upper reversal point of 25% elongation, exhibiting a residual elongation below 10% and a residual elongation of less than 12%. III. Air permeability

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

Test pressure: 200 Pa

Test result: in dm ³ / sm 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

 Luftdurchlässigkei

 t

[dm ³ / s ^* m ² ]

 Outer fabric 1, without 915

inlay

 Deposit after 129

example 1

 Deposit after 136

Example 2

 Deposit after 15

 Comparative example

 1

 Outer fabric 1, with 252

Deposit after Sewn Example 1

 Outer fabric 1, with 103

 Deposit after

 Sewn Example 2

 Outer fabric 1, with

 Insert stable

 (Comparative Example

 1) sewn

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 according to DIN EN ISO 5077: 2008-04 with DIN EN ISO 3759: 201 1 -08 and DIN EN ISO 6330: 2012. It is washed once at 40 ° C.

Table 4: dimensional change / shrinkage

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 in the Use of thermoplastic fibers and a foam coating based on vinyl acetate copolymers and / or polyacrylates and / or

Polyurethanes that have a low softening and / or

Have 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 is expected to be low

Shrinking up. V. Separation 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.

The separation force is tested according to 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 / TH1 S.

 Pre-load: 0.1 N

 Test speed: 150 mm / min.

Test climate: 22 ° C / 50% rel. humidity

The higher the test value of the separation force, the stronger the insert in the Temperature effect thermally bonded. 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

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 on thermal treatment would have been expected.

VI. Glass transition temperature Tg Tester: DSC 1 (Mettler Toledo)

 Heating rate (K / min): 10

Claims

 claims Bi-elastic insert comprising a meltblown nonwoven fabric containing 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. Insert according to 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. Insert according to 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 is. 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. 8. 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. 9. insert according to one or more of the preceding claims, characterized by a shrinkage of less than 5%. 10. Insert according to one or more of the preceding claims, characterized in that the foam coating a  Having pore structure in which more than 50% of the pores one  Diameter measured in accordance with DIN ASTM E 1294, which is in the range of 1 to 100 μηπ. 1 1. 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 of 10 [dm3 / s ^* m2] to 450 [dm3 / s ^* m2]. 12. 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 μηπ. 13. Insert according to one or more of the preceding claims, characterized in that the insert is formed as a proximity insert. 14. A method for producing a pad 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. 15. Down-filled textile product, in particular selected from jacket, bedding, upholstery, mattress or sleeping bag, comprising a textile cover and down contained therein, characterized in that the cover comprises an insert according to one or more of claims 1-13 for preventing leakage Down includes.