JP2003511567A - Heel lining for the shoe industry - Google Patents

Abstract

  (57) [Summary] The invention relates to a method wherein the material is from 180 to 350 g / m ^TwoOf non-woven fabric having an areal weight of> 15 N in the longitudinal and transverse directions, the non-woven fabric being melt spun, aerodynamically stretched and directly processed into a non-woven fabric having a fineness of <2 dtex. A heel lining for the shoe industry, comprising a component endless filament, wherein the multicomponent endless filament is divided and fixed after pre-fixing to at least 90% of ultrafine endless filaments with a fineness of <0.2 dtex.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD OF THE INVENTION

The present invention relates to a heel lining for the shoe industry and a method for manufacturing the same.

[0002]

[Prior art]

In the shoe industry, particularly wear-resistant materials are used for the second half of the shoe, the so-called heel pad lining. This material receives, on the one hand, the forces exerted on the shoe by the foot, especially during a longitudinal kick-up motion, and on the other hand, the frictional forces caused by the foot at least partially moving up and down in the shoe during walking. Have to endure. Rough or suede leather-like materials have traditionally been used for heel lining to avoid unwanted shoe removal during kicking exercises. The heel lining frictionally joins the foot or the user's socks to prevent slipping off of the shoe.

Besides heel linings made from natural materials, synthetic materials have also been used. This synthetic material is a needle-punched non-woven fabric, which is produced by carding from polyester fibers, viscose fibers, polyamide fibers, polypropylene fibers or mixtures of these fibers in a dry process. Therefore, a fibrous material having an areal weight of up to 800 g / m ² is provided, which is mechanically fixed by means of a strong needle punch. This manufacturing process by itself is extremely time consuming and thereby relatively costly. Usually, the needle punched nonwoven fabric is contracted by hot air or steam. This treatment densifies the material and also fixes it in terms of adjusting it to the density desired for its intended use. In order to achieve the necessary strength parameters for needlepunched nonwovens, for example tear resistance, dispersions of heat-coagulable latex binders such as styrene butadiene rubber (SBR) or nitrile butadiene rubber (NBR).
BR) is used for impregnation and subsequently dried. The proportion of this latex is about 30 to 60% by weight of the impregnated nonwoven fabric. The material thus prepared is divided into 2 to 4 thin layers. This dividing method is performed by diverting the technique of the leather industry into a non-woven fabric in order to improve the productivity in the production of the non-woven fabric. The divided product is further polished to homogenize the surface and to improve the cosmetic finish. Subsequently, in order to simplify the next processing, a melt adhesive is applied to one surface. The drawbacks of the synthetic heel linings that have been used so far are that the strength values differ greatly in the longitudinal direction and the lateral direction in particular, and the fiber bundles arranged in the vertical direction are split by the needle punching, resulting in strength loss, and Non-uniformity of the layer occurs on the needle protruding side.

[0004]

[Problems to be Solved by the Invention]

The present invention has an areal weight of 180 to 350 g / m ² in the longitudinal and transverse directions>
The problem is to provide a heel lining for the shoe industry, which has a tear resistance of 15N.

The invention further has the object of providing a particularly suitable method for producing such heel linings.

[0006]

[Means for Solving the Problems]

  According to the invention, the above problem is impregnated with a polymer, 180 to 350 g / m 2. ² Non-woven fabric having an area weight of> 15 N and a tear resistance of> 15 N in the longitudinal and transverse directions
Is solved by a heel lining for the shoe industry. Nonwoven fabric is melt spun and empty
Multi-component end with fineness <2dtex, which is aerodynamically stretched and directly processed into non-woven fabric
Consists of a filamentless filament, this multi-component endless filament is pre-fixed
Ultrafine endless filaments with fineness <0.2 dtex up to at least 90%
It is divided into two parts and is fixed. This heel lining is high tensile with little area weight
Shows load bearing and high friction resistance.

[0007]

DETAILED DESCRIPTION OF THE INVENTION

The heel lining of the present invention is preferably a two-component endless filament in which the multi-component endless filament is composed of two incompatible polymers, especially polyester and polyamide. The multi-component endless filaments thereby have good splittability and a very good ratio of strength to areal weight.

Preferably, the heel lining of the present invention has more polyester component in the multi-component endless filament than the polyamide component, in particular a weight ratio of polyester component to polyamide component in the range 1.1: 1 to 3: 1. Preferably. This heel lining thereby has a markedly fibrous hand and has good aging resistance.

It is particularly preferred for the heel lining of the present invention that the multicomponent endless filaments have a cross-section of orange-like multisegment structure, each segment alternating with one of the two incompatible polymers. Including.

The heel lining of the present invention is preferably pre-calendered to pre-fix a nonwoven formed from multi-component endless filaments. This material thereby has a significantly better thickness uniformity.

Furthermore, at least one of the incompatible polymers formed as multicomponent endless filaments is an additive, for example a color pigment, a long-acting antistatic agent and / or an additive which affects hydrophilicity or hydrophobicity. Heel backings containing agents in amounts up to 15% by weight are particularly preferred. This heel lining can thereby have a favorable effect on lightfastness, tendency to electrostatic charge, sweat transport or moisture retention. Furthermore, when a coloring pigment is added to the spinning material, it has friction resistance,
It is possible to apply a relatively deep coloring.

Furthermore, heel linings in which the multicomponent endless filaments are not crimped are particularly preferred. This is because the finely divided endless filaments can be favorably divided and the fibrous texture generated from the filaments is guaranteed.

According to the invention, the non-woven fabric comprises 20 to 5 polymer based on the weight of the original non-woven fabric.
A heel lining impregnated with 0% by weight is especially preferred. This heel backing has superior strength properties at comparable impregnation rates compared to known synthetic heel backing materials.

Heel backings having a hot melt adhesive coating on one side are preferred. Such materials are particularly suitable for continuous processing in automated equipment.

In the method for producing a heel lining according to the present invention, a multi-component endless filament is spun from a melt, stretched aerodynamically, directly processed into a non-woven fabric, pre-calendered or pre-fixed by needle punching. This is done by fixing the nonwoven with a high-pressure fluid jet while simultaneously splitting it into ultrafine endless filaments with a fineness of <0.2 dtex, followed by impregnation with polymer. The products thus obtained are remarkably uniform in strength and load bearing. This is because there is a very even distribution of filaments within the product. This product does not show a tendency to delaminate and has a high modulus and high tear resistance.

In another preferred embodiment of the method of the present invention, the pre-fixing and splitting treatment of the multicomponent endless filaments is carried out by subjecting both sides of the pre-fixed nonwoven fabric to alternating high pressure water jet a plurality of times. This type of pre-fixing and splitting treatment of multi-component endless filaments provides a highly dense nonwoven material with a smooth surface.

The pre-fixing and splitting treatment of the multi-component endless filament is preferably carried out in an apparatus equipped with a rolling mesh drum. The shape of this device makes it possible to build a very compact installation.

In a particularly preferred method, the impregnation of the predominantly non-woven fabric, which is predominantly divided into ultrafine endless filaments, is impregnated with an aqueous polyurethane latex dispersion or an aqueous NBR latex dispersion. Thereby, residual solvent can be avoided. Impregnation with the polymer is particularly environmentally friendly.

Particularly preferably, the polymer-impregnated material is further post-treated by polishing or buffing. The surface properties and feel of the material obtained by this treatment can be further improved. The microfilaments contained in the structure give rise to a particularly delicate and excellent nubuck-like surface, which is very similar to natural leather.

[0020]

【Example】

Example   65% by weight of poly (ethylene terephthalate) and poly (hexamethylene adipate)
Mido) From a multi-component endless filament consisting of 35% by weight, about 160 g / m ² A nonwoven fabric having an areal weight of Raw filament is about 1.8 dtex
It has a fineness of 16 and consists of 16 segments, in this case polyester and poly
Each of the mid segments has alternating central axes, like the orange segments.
It was winding around. This melt-spun multi-component endless filament is aerodynamic
The sheet was stretched and placed irregularly on the belt. The non-woven fabric obtained in this way
The temperature and the pressure of about 100 bar were fed to the preliminary calender. By needle punch
After mechanical pre-fixing, the water jet process is performed at a water pressure of about 100 bar.
It was. Subsequently, the multi-component endless filament is divided into about 0.1 dte.
x ultrafine endless filaments with a fineness of x
Prefixed using the Turjet process. This process is from 250 to 300 bar
On a mesh support with a water pressure of and a mesh width of 60 to 100 mesh
, Twice on each side. This non-woven fabric is subsequently dried and
It was impregnated with polymer using a dry-on-wet treatment with Tex. Non-woven
NBR is applied so that it is about 125% by weight with respect to the starting weight of the fabric material, and 180
Fixed by drying at ° C. After polishing 260g / m²Area weight of 0.75mm
A heel lining having a thickness was obtained. Comparative example   Polyester staple fiber and polypropylene staple fiber
From the above, a non-woven fabric was produced by strong needle punching and impregnated with NBR. Minute
320g / m by split treatment²Material having an area weight of 0.85 mm and a thickness of 0.85 mm
The fee was obtained.

A comparison of strength values and tear resistance is summarized in Table 1 below. In this case, the tear resistance is
The sample piece having a diameter of 90 mm was clamped to a rotary tearing head, and a friction pressure of 2.8 N / cm ² was applied to the sample to measure. The rotation angle of the tearing head was 50 degrees. Further, the test piece was tested by applying it to a friction member having a diamond pattern on the surface. In this case, the test pieces were soaked in water and subjected to periodic reciprocating motion. The friction cycle consisted of 300 reciprocating motions, and following this reciprocating motion, friction was visually evaluated using an evaluation sample.

[0022]

[Table 1]

─────────────────────────────────────────────────── ─── Continued front page    (81) Designated countries EP (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, I T, LU, MC, NL, PT, SE), AU, BA, B G, BR, BY, CA, CN, CZ, EE, HR, HU , ID, IL, IN, JP, KP, KR, LT, LV, MA, MD, MX, NO, PL, RO, RU, SG, S I, SK, TR, UA, US, VN, YU, ZA

Claims (16)

[Claims] 1. A non-woven fabric impregnated with a polymer, having an areal weight of 180 to 350 g / m ² and a tear resistance of> 15 N in the longitudinal and transverse directions, said non-woven fabric being melt-spun and aerodynamically Fineness drawn directly into a nonwoven fabric <
A heel lining for the shoe industry, consisting of 2 dtex multi-component endless filaments, said multi-component endless filaments being pre-fixed and divided and fixed by at least 90% into ultrafine endless filaments with a fineness <0.2 dtex. 2. The heel lining according to claim 1, wherein the multi-component endless filament is a two-component endless filament composed of two incompatible polymers, in particular polyester and polyamide. 3. The heel lining of claim 2, wherein the polyester component in the multi-component endless filament is higher than the polyamide component. 4. The heel lining of claim 3, wherein the weight ratio of polyester component to polyamide component in the multicomponent endless filament is 1.1: 1 to 3: 1. 5. A multi-component endless filament having a cross-section with an orange-like multi-segment structure, the segments alternatingly containing one of two incompatible polymers, respectively. The heel lining according to any one of 1. 6. The non-woven fabric formed from the multi-component endless filament has been pre-calendared for pre-fixation.
Heel lining as described in paragraph. 7. At least one of the incompatible polymers forming the multicomponent endless filaments affects additives such as color pigments, persistent acting antistatic agents and / or hydrophilic properties. Heel lining according to any one of claims 1 to 6, containing additives in an amount of up to 15% by weight. 8. The multi-component endless filament is not crimped,
Heel lining according to any one of claims 1 to 7. 9. Heel lining according to claim 1, wherein the nonwoven is impregnated with 20 to 50% by weight of polymer, based on the initial weight of the nonwoven. 10. Heel lining according to claim 1, wherein after polishing, the exposed microfilament ends provide a high quality nubuck-like surface. 11. The method of claim 1, wherein one surface is provided with a hot melt adhesive coating.
The heel lining according to any one of items 1 to 10. 12. A multi-component endless filament is spun from a melt, aerodynamically stretched, directly processed into a non-woven fabric, pre-calendered or pre-fixed by needle punching, and the non-woven fabric is fixed with a high pressure fluid jet. <0.2 at the same time
A method for producing a heel lining according to any one of claims 1 to 11, characterized in that it is divided into ultrafine endless filaments having a fineness of dtex and subsequently impregnated with a polymer. 13. The pre-fixing and splitting treatment of the multi-component endless filament is performed by alternately applying both sides of the pre-fixed nonwoven fabric to a high-pressure water jet a plurality of times. Method. 14. Method according to claim 13, characterized in that the pre-fixing and splitting treatment of the multicomponent endless filaments is carried out in a device with a rolling mesh drum. 15. The method according to claim 12, wherein the impregnation with the polymer is carried out with an aqueous polyurethane latex dispersion. 16. The post-treatment is carried out by polishing or buffing,
The method according to any one of claims 12 to 15.