DD128220B1 - INNOOLS OF TEXTILE CASED POLYOLEFINE FOAM - Google Patents

Description

-ι- 195903

Application area; the invention;

The invention relates to insoles made of textile-laced polyolefin foam, which are used as cover insoles and insoles.

Characteristic of the known technical solutions:

There are shoe soles, such as running, intermediate, fire, wedge and insoles known, which consist at least partially of thermoplastic materials, wherein at least a portion of the consisting of plastic sole parts is at least partially formed by a cell body with closed, gas-filled cells.

These soles consist at least partially of a cell body

3 with a specific gravity of 0.1 to 0.3 g / cm (DT-PS 882 052).

These soles do not have optimal sole properties because the ratio of cell body to other sole components is unfavorable. This has negative effects on the foot hygiene properties and the running properties as well as the wear resistance.

Furthermore, insoles are known which consist of a synthetic resin, wherein the synthetic resin contains 2 to 17% of vinyl acetate or Copolyanisate of ethylene and vinyl acetate or a mixture of such a copolymer with polyethylene.

195903

The film is an extruded foam having a substantially uniform density of 0.1 to 0.5 g / cnr and having a substantially closed cell structure. At least 75 % of the cells have a diameter of 0.1 to 1 mm. The extruded foam sheet is preferably subjected to the action of an electrical discharge. The connection between the insole and the other sole parts is made with hot or cold adhesive, neoprene or polyurethane adhesive (DE-OS 1 904 892). These soles have the night that they contain no textlien components that absorb the transpiration moisture. Another disadvantage is that the connection between the insole and the other sole parts is made by adhesives. The bond strength between upper and lower material is loosened by the transpiration moisture and leads to rapid wear of the soles. Also known is an ax several layers welded together cushion insole. It contains a base layer consisting of a fabric and a fully synthetic material and a cover layer consisting of a laminated PVC foam film and a smooth film. Between the base layer and the cover layer there is a weldable nonwoven padding (DD-PS 75 709). The production of the individual layers for this padded insole is complex. In addition, only similar materials can be joined together by welding. The known soles do not meet the requirements placed on a good sole material in terms of moisture absorption, thermal insulation, foot embedability and stiffness.

2iel the invention

The object of the invention is to provide insoles which are useful as insoles and cover insoles, with improved durability and improved build properties.

-z- 195903

Explanation of the essence of the invention

The object of the invention is to produce insoles, which have good wear-resistant properties, without losing the fubeinbettenden properties and to a certain extent moisture-absorbing properties zen while having good thermal insulation.

This object is achieved by textile-laminated polyolefin foam insoles usable as insoles or cover insoles and consisting of a composite of a polyolefin foam as a sub-material and a textile upper, the composite of upper and lower material being manufactured by theirira cocoring without adhesives and the polyolefin foam being extruded Polyethylene foam, an extruded ethylene-vinyl acetate copolymer foam or a Mischpolymerisatschaum consisting of polyethylene and ethylene-vinyl acetate Copolyrnerisat is solved, according to the invention, the predominant size of the cross-sectional areas of the individual foam

Pore pores in the range of 0.025 to 0.1 mm and the thickness of the foam base material is 1.8 to 2.8 mm, the upper is a flat textile material, which has a static water absorption capacity of at least 140 % and the Vernältnis the mass from upper to lower material within the limits of 1: 0.8 to 1: 2.8. Advantageously, the foam base material of the insoles consists of a mixture of polyethylene and ethylene-vinyl acetate copolymer, wherein the proportion of the copolymer is up to 40 % . The density of the foam material is advantageously in the range of 0.18 g / cnr to 0.25 g / cnr and the thermal conductivity is not greater than 0.04 kcal / msgrad. The flat textile material of the insoles may be a Malimofrottee, which consists of cotton fibers or cotton-cellulose mixed fibers.

The bending stiffness of the insoles is advantageously greater than 150 pcm in the running direction

 Advantageously, the insoles are perforated.

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Embodiments;

example 1

It is a Mischpolymeriatschaurn extriidiert consisting of 80 wt -.% Polyethylene with a density of 0.915 ß / om and a Sohmelzindex of 8 g / 10 min and 20 wt .-? O ethylene-vinyl acetate copolymer having a Vinylaoetatanteil of 5 wt. %, a density of 0.925 g / cm and a melt index of 3 g / 10 min. The Mischpolyrnerisatschaum is 2.2 mm thick and has a density of 0.23 g / cm

 The vast size of the cross-sectional areas of the individual

Foam pore is 0.050 mm ".

The Malimofrottee fabric used has a basis weight of ЗЗО g / m and a fineness of JTähfadens of 50 tex * The Malimofrottee consists of ^л , 00% cotton.

The cover insole for a ski boot has been obtained by punching from this sheet-shaped semi-finished product.

The bond strength between upper and lower material is 3.2 kp under TGL 12972.

The composite is produced by thermo-laminating without the use of adhesives.

The ratio of the material masses from upper to lower material is 1; -1.55 · The cover insole is glued to the shoe underlay with Ohernisol 1103.

The flexural stiffness in the direction of travel is 165 pcm, measured according to TGL 29423.

Example 2

The polyethylene used for foaming has a density of 0.915 g / onr and has a melt index of 8 g / 10 min. The extruded polyethylene foam is 2.8 microns thick and has a density of 0.18 g / cm- ¹ .

The predominant size of the cross-sectional areas of the individual

ρ foam pores is 0.085 mm. The Maliwatt fabric has a plan

mass of 265 g / m and is made of cellulosic wool. The insole for a street shoe xst is punched out of this sheet-like composite material.

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195903

The Verbimdfestigkeit zwisohen upper and lower material is 6.0 kp, measured according to TGL 12972.

The composite is made by the thermal lamination process without the use of adhesives.

The ratio of the material masses of the upper sub-material is 1: 1.9 · The bending stiffness in the direction of travel is 254 pcm, measured according to TGL 29423 »

Claims (7)

- б - 195903 ErfindungsansprucLi 1. Inner soles of textile-laminated polyolefin foam, which are used as insoles and Deokbrandohlen and consist of a composite of a Polyolefinsohaumes as a sub-material and a textlien upper material, wherein the composite of upper and lower material is produced by thermal lamination without adhesives and the polyolefin foam is an extruded Polyathylenschaum extruded ethylene-vinyl acetate copolymer foam or a Mischpolymerisatschaum consisting of polyethylene and ethylene-vinyl acetate copolymer, characterized in that the predominant size of Quirschnittaflachen the individual foam pores in the range of 0.025 to 0.1 mm and the thickness of the foam sub-material 1, 8 to 2.8 mm, the upper is a sheet of textile material having a static water absorption capacity of at least 140 % and the ratio of the mass of upper to lower material within the limits of 1: 0.8 to 1 $ 2.8 , 2. The solenoids according to item 1, characterized in that the foam sub-material is a mixture of polyethylene and ethylene-vinyl acetate t-CopojLymeriaat and'der the proportion of the copolymer is up to 40 % . 3. insoles according to item 1 and 2, characterized in that the density of the foam sub-material in the range of 0.18 g / cm to 0.25 g / cm. 4. insoles according to item 1 to 3, characterized in that the Wärmsleitfähigkeit the foam sub-material is not greater than 0.04 kcal / m.s.grd. 5. Insoles according to item 1, characterized in that the flat textile material is a Malimofrottee, which consists of cotton fibers or cotton-cellulose wool mixed fibers is. τ- 195903 6. Insoles according to item 1 to 5, characterized in that the bending stiffness of the soles in the direction of travel is greater than 150 pcm. 7. Innonsohlen after item 1 to 6, characterized in that the soles are perforated. Considered documents: DE-OS 1 904 892 (71 a, 13/38)
DD-PS 75 709 (A 43 b 13/40)