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Multilayered insole for footwear

a multi-layer, insole technology, applied in the direction of insoles, uppers, bootlegs, etc., can solve the problems of bad air permeability and air permeability of insoles

Inactive Publication Date: 2008-06-05
CHEN TING CHUN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention is a multilayered insole for footwear that has three layers: a base layer, an intermediate layer, and an upper layer. The base layer is made of a foamable polymeric resin composition, while the intermediate layer is made of a mixture of foamable polymeric resin compositions and recycled foamable polymeric materials. The sum of the first thickness of the base layer and the second thickness of the intermediate layer is larger than 0.5 mm. The upper layer is made of a foamable polymeric resin composition, and its thickness can be from 2 mm to 5 mm. This design provides improved comfort, durability, and stability for the foot.

Problems solved by technology

But the drawback of the three-layer insole is that the air permeability thereof turns bad as comparing with prior art.
In other words, the patented insoles may have good retention of cushioning properties after wear but the air permeability thereof is bad.

Method used

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Embodiment Construction

[0011]Referring to FIGS. 1 and 2, the insole 10 of the present invention generally comprises a base layer 12, an intermediate layer 14, an upper layer 16 and a top layer 20.

[0012]The base layer 12, which is made of a first foamable material formed by a foamable polyurethane resin, is preferably of generally flat construction with a thickness of 0.5 mm. The base layer 12, for having a thickness specially designed and being made of a foamable material not mixed with any other materials, has a better resistance to compression than any other foamable materials so as to provide a high retention rate of cushioning properties after wear.

[0013]The intermediate layer 14 is adhered to an upper surface of the base layer 12 and preferably is of generally flat construction. The intermediate layer 14 is made of a second foamable material formed by a foam polyurethane resin mixing with recycled polymeric foam materials. Such a foamable material, for being mixed with recycled polymeric foam materia...

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Abstract

A multilayered insole for footwear comprises a base layer having a first thickness, an intermediate layer having a second thickness and adhered to an upper surface of the base layer, and an upper layer having a third thickness and adhered to a free surface of the intermediate layer. The base and upper layers are both made of a first material formed by foamable polymeric resin compositions. The intermediate layer is made of a second material formed by foamable polymeric resin compositions mixed with recycled foamable polymeric materials. A sum of the first thickness of the base layer and the second thickness of said intermediate layer is larger than 0.5 mm. The third thickness of the upper layer can be from 2 mm to 5 mm.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates generally to insoles for footwear, and more particularly to a multilayered insole having good resistance to compression and excellent air permeability.[0003]2. Description of the Related Art[0004]U.S. Pat. No. 4,642,912 issued to Gray discloses an improved insole. The insole is characterized in that it consists of three layers. Each of the layers is constructed of flexible foam with a specific compressive strength. As a result, the retention rate of cushioning properties after wear of the insole is higher than that of prior art. But the drawback of the three-layer insole is that the air permeability thereof turns bad as comparing with prior art. In other words, the patented insoles may have good retention of cushioning properties after wear but the air permeability thereof is bad.[0005]Thus, there exists a need for an insole having good retention of cushioning properties after wear as well ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A43B7/06A43B13/38
CPCA43B13/12A43B13/386A43B17/14A43B17/006A43B17/10A43B17/003
Inventor CHEN, TING-CHUN
Owner CHEN TING CHUN
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