JPH1057103A - Footwear having improved moisture permeability - Google Patents

Abstract

PROBLEM TO BE SOLVED: To impart a good feel to put on to a user by arranging felt on liquid and water impermeable and moisture permeable layers in the delineated spaces of outsoles and midsoles. SOLUTION: The footwear is formed of the outsoles having grip soles 2, the midsoles 3 and uppers 1. The midsoles and the grip soles have plural holes 4 and 4' for passing the steam generated by the sweat of the feet to the outside. The shoes are internally provided with lining layers 5. The layers 6 of materials, such as stretched porous polytetrafluoroethylene, having the steam permeability and the liquid and water impermenability are adhered to the grip soles between the grip soles and the upward facing parts of the uppers 1 to remove the steam and simultaneously to prohibit the infilration of the fluid from the outside. Layers 7 of the microcapillary felt which is polyester of monofilament felt formed of, for example, needle mechanisms, are inserted into the delineated spaces of the outsoles and the midsoles.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention provides improved water vapor permeable footwear provided with a layer of water vapor permeable and water tight material.

[0002]

BACKGROUND OF THE INVENTION Footwear made of synthetic materials, especially those made of polyurethane foam, plastic and similar materials, has become very popular in recent years. This footwear, especially one with a plastic outsole and a fabric upper, has two major disadvantages. For one, the use of plastics completely prevents the transmission of water vapor through the outsole (ie, "breathable", hereinafter the same), giving the user a well-known adverse result. On the other hand, the use of fabric to create the upper makes such footwear liquid permeable,
Not recommended for use in adverse weather or wet environments.

[0003] Footwear that eliminates these disadvantages is known, and an inner layer of a water vapor permeable, liquid water impermeable material, such as what is known as expanded porous polytetrafluoroethylene, is provided on the sole and / or upper. Can be This material provides a free passage for water vapor from the interior of the footwear to the exterior, while providing an absolutely impervious barrier to water penetration.

[0004] In some cases, prior art footwear has a pouch-type inner lining that completely covers the inside of the footwear. In another case, a water vapor permeable and water tight material as described above is provided, covering the upper part or at least a part thereof. In one application, the water vapor permeable, water tight material is inserted between an outsole and a midsole, the outsole and the midsole having a plurality of holes for the flow of water vapor through the outsole.

[0005]

SUMMARY OF THE INVENTION Inserting a layer of microcapillary felt into the space defined between the outsole and the midsole,
Allows a soft sole zone and a very flexible outsole to be provided to the footwear, contributes to the drainage of water vapor generated by the evaporation of sweat from the feet, and improves the user's comfort at the same time It has been newly found that it still has the advantages obtained by the application of water vapor permeable and water tight materials.

[0006] More specifically, footwear according to the present invention has an outsole, a midsole, and an upper. There is a layer of liquid water impermeable and water vapor permeable material between the midsole and the outsole. The outsole and the midsole may have a plurality of holes for allowing water vapor from inside the footwear to escape to the outside. The felt is in the space defined between the outsole and the midsole,
It is disposed on a liquid water impermeable and water vapor permeable layer.

[0007] This construction allows the user to be provided with better comfort while at the same time providing all the advantages of water tightness and water vapor permeability inherent in this type of footwear.

[0008]

1 shows an outsole having a grip sole 2 and an upper of footwear mounted on a midsole 3; Each of the midsole and the grip sole has a plurality of holes 4 and 4 'for allowing water vapor generated by sweat of the foot to flow from the inside of the footwear to the outside.

[0009] A lining layer 5 is provided at the appropriate time inside the shoe. This lining is fixed internally to the instep,
It is preferably in the form of a pouch. Between the grip sole and the upwardly facing portion of the upper, a layer 6 of a water vapor permeable, liquid water impermeable material, such as expanded porous polytetrafluoroethylene, is adhered to the grip sole 2 and, simultaneously with the removal of water vapor, from the outside Contributes to the prevention of liquid intrusion.

[0010] The layer 6 of this material is preferably glued around the periphery, leaving the central part provided with the holes 4 free. The present invention relates to the use of a monofilament felt made, for example, on a needle loom, for example in a space defined between an outsole and a midsole, such as 110-200.
It is characterized by the insertion of a layer 7 of polyester microcapillary felt having a weight of g / m ² .

The use of this microcapillary felt significantly increases the surface for water vapor transmission by making available the internal microcavities, thereby removing water vapor from the surrounding zones by diffusion and providing a grip sole. It has the feature of discharging it through the holes. This felt layer may be, for example, 2-3 mm thick.

The insertion of such felt in the space defined between the outer sole and the midsole contributes to the formation of a layer of soft material in the contact area of the foot, making the grip sole as thin as possible. And can be made compact, thus ensuring good flexibility of the outsole. Preferably, the midsole 3 consists of three layers, two outer layers 8 surrounding a layer 9 of a so-called spacer material, this spacer material comprising:
For example, consisting of a polyamide in the form of a plurality of wavy filaments or broadly coarse filaments, keeping a space between the two outer layers and contributing to the movement of water vapor in the direction of the microcapillary felt layer 7 without absorbing water vapor A plurality of flow paths, thereby further improving moisture permeability.

As a result, footwear is provided that provides the user with improved comfort and convenience. It will also be apparent that the dimensions and materials used may vary depending on the particular application.

[Brief description of the drawings]

FIG. 1 schematically shows a cross section of footwear according to the invention.

2 shows a plane perpendicular to the cross section of the footwear of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Instep 2 ... Grip sole 3 ... Midsole 4 ... Hole 5 ... Lining layer 6 ... Moisture permeable material layer 7 ... Capillary felt layer 8 ... Outer layer 9 ... Spacer material layer

 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Antonio Ferrarese, Italy, 37063 Isola della Scala (Buerle), Via Remembranza, 23

Claims (5)

[Claims] 1. A type comprising a midsole, an outsole having a plurality of holes for the flow of steam, and a liquid-impermeable, water vapor-permeable material provided between the outsole and the midsole. Footwear, wherein the felt layer is between the outsole and the midsole. 2. Footwear according to claim 1, wherein the felt is a microcapillary felt. 3. The footwear according to claim 2, wherein the midsole has at least one layer defining a plurality of channels that contribute to the movement of water vapor toward the microcapillary felt. 4. The footwear according to claim 2, wherein the felt is a monofilament felt made by a needle loom. 5. The felt has a weight of 110 to 200 g / m ^2.
The footwear according to claim 4, wherein the footwear is a polyester having a weight of: