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US20070175068A1 - PU sole for shoes - Google Patents

PU sole for shoes Download PDF

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Publication number
US20070175068A1
US20070175068A1 US11/341,426 US34142606A US2007175068A1 US 20070175068 A1 US20070175068 A1 US 20070175068A1 US 34142606 A US34142606 A US 34142606A US 2007175068 A1 US2007175068 A1 US 2007175068A1
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United States
Prior art keywords
base layer
air permeable
permeable portion
shaped hole
present
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US11/341,426
Inventor
Hung-Chi Lin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to US11/341,426 priority Critical patent/US20070175068A1/en
Publication of US20070175068A1 publication Critical patent/US20070175068A1/en
Abandoned legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B17/00—Insoles for insertion, e.g. footbeds or inlays, for attachment to the shoe after the upper has been joined
    • A43B17/08—Insoles for insertion, e.g. footbeds or inlays, for attachment to the shoe after the upper has been joined ventilated

Definitions

  • the present invention is related to the technique and products about manufacturing shoes, particularly to a sole partly made of PU.
  • a shoe sole includes an absorbent layer made of absorbent fibers, and a surface layer secured on top of said absorbent layer.
  • the surface layer is made of woven material with liquid permeability.
  • a layer ( 1 ) made of water-repellent fibers, these water-repellent fibers coiled around and threaded through the surface layer to the capillary vessels of an absorbent layer.
  • shoe soles can be made from plastics, like the sole of the sneaker, most of the soles are mainly made from EVA or PU. It is expected that tiny pores of the foam like plastics shoe sole to improve the air permeability of the shoe sole.
  • EVA is known popular like “finished India rubber” in Chinese language.
  • a scientific name for EVA is Ethylene-Vinyl Acetate.
  • the PU is the abbreviated name of a scientific name Polyurethane.
  • EVA material exhibits many unique foam-like pores with softness, oil resistant, low thermal conductivity and ideal flexibility so that most shoe soles are made of EVA in recent years.
  • EVA based shoe soles still has some shortcomings. First of all, the hardness of EVA is insufficient to resist the time-dependent creep so that the EVA will be easily deformed and out-of-shape or shorten its lifetime.
  • low air permeability of the EVA may cause beriberi, the user being suffered discomfort after a long time slip-on shoes with EVA sole inside.
  • a hardness of polyurethane foam and the like can be used instead of said EVA.
  • the compressibility, heat-resistant, dimension stability and air permeability are improved for the finished PU rather than said EVA.
  • the PU is more expensive than the EVA. In manufacturing, the material cost is raised due to the finished PU must be processed through hardened treatment. It results in the loss of competitive ability in the market.
  • the primary object of the present invention is to provide a cost-effective, durable and air permeable shoe sole.
  • a shoe sole includes a surface layer and a base layer, the surface layer is attached to the upper surface of the base layer; a shaped hole formed through the base layer, an air permeable portion filled in the shaped hole; the air permeable portion is integrally combined to the base layer as a whole.
  • a woven material based surface layer is combined to an EVA based base layer by gluing, the outer circle of a PU based air permeable portion is glued together with the inner circle of the shaped hole integrally as a whole.
  • an air permeable portion is secured and adapted to the base layer.
  • the air permeable portion enhances the air permeability of a shoe sole.
  • the foot of the user will keep dry and more comfortable via the air permeable portion.
  • a shoe sole with air permeable portion can be endured longer lifetime in use, PU processing through hardened treatment has stable structure and avoid itself from deformation.
  • the present invention only provides part of air permeable portion on the shoe sole. The material cost can be saved to increase the competitive ability of products in market promotion.
  • FIG. 1 is a schematic view of the structure of the present invention.
  • FIG. 2 is an exploded view of the first embodiment of the present invention.
  • FIG. 3 is a schematic view of the structure of the second embodiment of the present invention.
  • FIG. 4 is a schematic view of the structure of the third embodiment of the present invention.
  • the present invention includes a surface layer 1 and a base layer 2 .
  • the surface layer 1 is made of woven material. And the surface layer 1 is attached to the base layer 2 by gluing or adhering.
  • a shaped hole 21 is formed through the base layer 2 .
  • the hole 21 is located at the middle portion of the base layer 2 .
  • An air permeable portion 22 is filled in through the location of the shaped hole 21 .
  • the air permeable portion 22 is combined to the base layer 2 integrally as a whole with better air permeability.
  • the concrete structure of them is: PU based air permeable portion 22 has a rim or outer circle adhered to an inner circle of the shaped hole 21 integrally as a whole.
  • the base layer 2 is made of EVA material, while the air permeable portion 22 is made of PU, which is located at the middle portion of the base layer 2 .
  • Manufacturing method of the base layer 2 is described as following. First of all, processing an EVA based plastic, and then cutting a portion of the EVA based plastic into the shape of a shoe sole, trims a shaped hole in the middle of the cut open portion (i.e. EVA based base layer). Thus a shaped hole is formed through the cut open portion thereof. After the shaped hole is shaped, by means of injection molding injects PU material, which is processed with hardened treatment before injection, into the shaped hole 21 to form an air permeable portion 22 . Through the process of injection molding, the air permeable portion 22 is secured to the base layer 2 integrally as a whole. Finally, the surface layer 1 is attached to an upper surface of the base layer 2 .
  • the manufacturing process of the present invention is thus as described above.
  • the middle portion of the sole has an air permeable portion 22 with improved air permeability.
  • the foot of the user can keep dry and more comfortable for an air permeable portion 22 formed through the sole.
  • the air permeable portion 22 keeps a stable structure without deformation due to the PU is pre-processed through hardened treatment.
  • the present invention has a prolonged lifetime in practice.
  • the material cost is saved. Only partly adopts the PU based air permeable portion 22 incorporated into the middle portion of the base layer 2 . That is, the permeable portion 22 only formed through the middle portion of a sole, which is endurable for men's foot to slip-on, to exert his foot pressure strength and sweat.
  • the EVA based material is adapted to the sole portion around the rim of the permeable portion to guarantee the quality of the mass production of the present invention, the capital investment plan for the present invention is cost effective. The manufacturer can promote the products with competitive ability in market.
  • FIG. 3 a second embodiment of the present invention is illustrated, as shown, the present invention can be applied to kinds of all sizes and styles of shoes.
  • FIG. 4 based on the prior embodiments, a third embodiment of the present invention is illustrated as shown.
  • a number of improved air permeable shaped holes 21 are illustrated as shown.
  • holes 21 are formed through the base layer 2 .
  • Theses holes 21 are placed below the sole and heel of a man's foot.
  • these air permeable portions are formed through and filled in these shaped holes 21 .
  • Adoption of this kind of structure further saves more material cost for manufacturing shoe soles. And improves the products' competitive ability in market promotion.

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  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)

Abstract

The present invention is aimed to provide a shoe sole partly made of PU. The object is realized by a shoe sole having a woven surface layer attached to the surface of an EVA based base layer; a shaped hole formed through the base layer, a PU based air permeable portion filled in the shaped hole; the surface layer and PU based air permeable portion are glued together with the EVA based base layer integrally as a whole. An air permeable portion is mainly located at the middle portion to improve the air permeability thereof. The foot of the user can keep dry and more comfortable by improved air permeable portions. The present invention also has stable structure, prolonged lifetime without deformation by partly adopted PU material. It is beneficiary and advantageous for manufacturers adopting the present invention to guarantee the quality of shoe products.

Description

    FIELD OF THE INVENTION
  • The present invention is related to the technique and products about manufacturing shoes, particularly to a sole partly made of PU.
    • BACKGROUND OF THE INVENTION
  • Most people are devoted to design a sole with permeability, durability and cost-effective. From conventional sole such as stitching across a canvas strap sole to kinds of modern soles; various modifications about sole materials, sole styles are on sale in the market. R&D focuses on shoe sole seems never stop. For example, Chinese pending patent application no. 86100267 “shoe sole” assigned to Carl Freudenberg & Co. in Germany published on Dec. 3, 1986. It disclosed a shoe sole includes an absorbent layer made of absorbent fibers, and a surface layer secured on top of said absorbent layer. The surface layer is made of woven material with liquid permeability. In which, a layer (1) made of water-repellent fibers, these water-repellent fibers coiled around and threaded through the surface layer to the capillary vessels of an absorbent layer.
  • Accompanied by the progress of the Chemistry Engineering Industry, shoe soles can be made from plastics, like the sole of the sneaker, most of the soles are mainly made from EVA or PU. It is expected that tiny pores of the foam like plastics shoe sole to improve the air permeability of the shoe sole.
  • EVA is known popular like “finished India rubber” in Chinese language. A scientific name for EVA is Ethylene-Vinyl Acetate. And the PU is the abbreviated name of a scientific name Polyurethane. As the EVA material exhibits many unique foam-like pores with softness, oil resistant, low thermal conductivity and ideal flexibility so that most shoe soles are made of EVA in recent years. But EVA based shoe soles still has some shortcomings. First of all, the hardness of EVA is insufficient to resist the time-dependent creep so that the EVA will be easily deformed and out-of-shape or shorten its lifetime. Secondly, low air permeability of the EVA may cause beriberi, the user being suffered discomfort after a long time slip-on shoes with EVA sole inside. But, after processing PU through hardened treatment, a hardness of polyurethane foam and the like can be used instead of said EVA. Besides, after processing PU through hardness treatment, it is expected that the compressibility, heat-resistant, dimension stability and air permeability are improved for the finished PU rather than said EVA. More manufacturers adopted the finished PU for manufacturing shoe soles. But the PU is more expensive than the EVA. In manufacturing, the material cost is raised due to the finished PU must be processed through hardened treatment. It results in the loss of competitive ability in the market.
    • SUMMARY OF THE INVENTION
  • Accordingly, the primary object of the present invention is to provide a cost-effective, durable and air permeable shoe sole.
  • The object is realized by a shoe sole includes a surface layer and a base layer, the surface layer is attached to the upper surface of the base layer; a shaped hole formed through the base layer, an air permeable portion filled in the shaped hole; the air permeable portion is integrally combined to the base layer as a whole.
  • A woven material based surface layer is combined to an EVA based base layer by gluing, the outer circle of a PU based air permeable portion is glued together with the inner circle of the shaped hole integrally as a whole.
  • After adopting the structure as mentioned above, an air permeable portion is secured and adapted to the base layer. Thus the air permeable portion enhances the air permeability of a shoe sole. Moreover, the foot of the user will keep dry and more comfortable via the air permeable portion. At the same time, a shoe sole with air permeable portion can be endured longer lifetime in use, PU processing through hardened treatment has stable structure and avoid itself from deformation. Furthermore, the present invention only provides part of air permeable portion on the shoe sole. The material cost can be saved to increase the competitive ability of products in market promotion.
    • BRIEF DESCRIPTION OF DRAWING
  • FIG. 1: is a schematic view of the structure of the present invention.
  • FIG. 2: is an exploded view of the first embodiment of the present invention.
  • FIG. 3: is a schematic view of the structure of the second embodiment of the present invention.
  • FIG. 4: is a schematic view of the structure of the third embodiment of the present invention.
    • EMBODIMENTS OF THE PRESENT INVENTION
  • The description is described according to the appended drawings hereinafter.
  • Referring to FIG. 1 and FIG. 2, the present invention includes a surface layer 1 and a base layer 2. The surface layer 1 is made of woven material. And the surface layer 1 is attached to the base layer 2 by gluing or adhering. A shaped hole 21 is formed through the base layer 2. The hole 21 is located at the middle portion of the base layer 2. An air permeable portion 22 is filled in through the location of the shaped hole 21. And the air permeable portion 22 is combined to the base layer 2 integrally as a whole with better air permeability. The concrete structure of them is: PU based air permeable portion 22 has a rim or outer circle adhered to an inner circle of the shaped hole 21 integrally as a whole.
  • The base layer 2 is made of EVA material, while the air permeable portion 22 is made of PU, which is located at the middle portion of the base layer 2. Manufacturing method of the base layer 2 is described as following. First of all, processing an EVA based plastic, and then cutting a portion of the EVA based plastic into the shape of a shoe sole, trims a shaped hole in the middle of the cut open portion (i.e. EVA based base layer). Thus a shaped hole is formed through the cut open portion thereof. After the shaped hole is shaped, by means of injection molding injects PU material, which is processed with hardened treatment before injection, into the shaped hole 21 to form an air permeable portion 22. Through the process of injection molding, the air permeable portion 22 is secured to the base layer 2 integrally as a whole. Finally, the surface layer 1 is attached to an upper surface of the base layer 2. The manufacturing process of the present invention is thus as described above.
  • After incorporated with such PU material, the middle portion of the sole has an air permeable portion 22 with improved air permeability. The foot of the user can keep dry and more comfortable for an air permeable portion 22 formed through the sole. The air permeable portion 22 keeps a stable structure without deformation due to the PU is pre-processed through hardened treatment. Thus the present invention has a prolonged lifetime in practice. And, in the present invention, the material cost is saved. Only partly adopts the PU based air permeable portion 22 incorporated into the middle portion of the base layer 2. That is, the permeable portion 22 only formed through the middle portion of a sole, which is endurable for men's foot to slip-on, to exert his foot pressure strength and sweat. But the EVA based material is adapted to the sole portion around the rim of the permeable portion to guarantee the quality of the mass production of the present invention, the capital investment plan for the present invention is cost effective. The manufacturer can promote the products with competitive ability in market.
  • Referring to FIG. 3, a second embodiment of the present invention is illustrated, as shown, the present invention can be applied to kinds of all sizes and styles of shoes.
  • Referring to FIG. 4, based on the prior embodiments, a third embodiment of the present invention is illustrated as shown. A number of improved air permeable shaped holes 21 are illustrated as shown. In that, holes 21 are formed through the base layer 2. Theses holes 21 are placed below the sole and heel of a man's foot. And these air permeable portions are formed through and filled in these shaped holes 21. Adoption of this kind of structure further saves more material cost for manufacturing shoe soles. And improves the products' competitive ability in market promotion.

Claims (4)

1. A shoe sole comprising:
A surface layer (1) and a base layer (2), the surface layer (1) is attached to the upper surface of the base layer (2); characteristic in that:
A shaped hole (21) formed through the base layer (2), an air permeable portion (22) filled in the shaped hole (21), the air permeable portion (22) combined to the base layer (2) integrally as a whole.
2. A shoe sole according to claim 1 claimed, in that, a woven material based surface layer (1) is combined to an EVA based base layer (2) by gluing, PU based air permeable portion (22) is glued together with the inner circle of the shaped hole (21) integrally as a whole.
3. A shoe sole according to the claim 1 claimed, in that, a shaped hole (21) is formed through the base layer (2), the hole is located at the middle portion of the base layer (2).
4. A shoe sole according to the claim 1 claimed, in that, a plurality of shaped holes (21) are formed through the base layer (2), the holes (21) are placed below the sole and heel portion of man's foot respectively.
US11/341,426 2006-01-30 2006-01-30 PU sole for shoes Abandoned US20070175068A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US11/341,426 US20070175068A1 (en) 2006-01-30 2006-01-30 PU sole for shoes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US11/341,426 US20070175068A1 (en) 2006-01-30 2006-01-30 PU sole for shoes

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US20070175068A1 true US20070175068A1 (en) 2007-08-02

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070296115A1 (en) * 2004-11-08 2007-12-27 Ejner Truelsen Shoe and a Method of Making Shoes
US20100186264A1 (en) * 2009-01-26 2010-07-29 Cook Christopher S Article of Footwear with Two Part Midsole Assembly
US20110138655A1 (en) * 2006-12-01 2011-06-16 Ariat International, Inc. Advanced torque stability footbed
US20120324758A1 (en) * 2011-06-21 2012-12-27 Tang Hung V Footwear Pressure Elimination & Dipersibility Systematic
US20130167405A1 (en) * 2011-12-30 2013-07-04 4C Golf, Inc. Replaceable heel cushion cavity
US20140259801A1 (en) * 2013-03-15 2014-09-18 New Balance Athletic Shoe, Inc. Multi-Density Sole Elements, and Systems and Methods for Manufacturing Same
CN105212427A (en) * 2015-11-14 2016-01-06 际华三五一五皮革皮鞋有限公司 A kind of sole adsorbing PM2.5
US11559106B2 (en) * 2019-10-24 2023-01-24 Nike, Inc. Article of footwear and method of manufacturing an article of footwear

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2010856A (en) * 1934-05-10 1935-08-13 Goldberg Aaron Boot and shoe
US2405224A (en) * 1944-11-11 1946-08-06 Margolin Meyer Novel shoe construction
US4507880A (en) * 1982-09-09 1985-04-02 Kabushiki Kaisha Patine Shokai Boot containing ventilation means
US5718064A (en) * 1994-04-04 1998-02-17 Nine West Group Inc. Multi-layer sole construction for walking shoes
US5815949A (en) * 1997-06-10 1998-10-06 Sessa; Raymond V. Footwear insert providing air circulation
US20010003875A1 (en) * 1998-06-25 2001-06-21 Moretti Mario Polegato Vapor-permeable waterproof sole for shoes
US6389711B1 (en) * 1997-05-09 2002-05-21 Nottington Holding B. V. Vapor-permeable shoe
US6508015B1 (en) * 1996-02-08 2003-01-21 Max Rauch Breathing sole
US20070028483A1 (en) * 2005-05-20 2007-02-08 Yoshiaki Miyata Air-permeable shoe

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2010856A (en) * 1934-05-10 1935-08-13 Goldberg Aaron Boot and shoe
US2405224A (en) * 1944-11-11 1946-08-06 Margolin Meyer Novel shoe construction
US4507880A (en) * 1982-09-09 1985-04-02 Kabushiki Kaisha Patine Shokai Boot containing ventilation means
US5718064A (en) * 1994-04-04 1998-02-17 Nine West Group Inc. Multi-layer sole construction for walking shoes
US6508015B1 (en) * 1996-02-08 2003-01-21 Max Rauch Breathing sole
US6389711B1 (en) * 1997-05-09 2002-05-21 Nottington Holding B. V. Vapor-permeable shoe
US20020100187A1 (en) * 1997-05-09 2002-08-01 Nottington Holding B.V. Vapor-permeable shoe
US6839984B2 (en) * 1997-05-09 2005-01-11 Geox S.P.A. Vapor-permeable shoe
US5815949A (en) * 1997-06-10 1998-10-06 Sessa; Raymond V. Footwear insert providing air circulation
US20010003875A1 (en) * 1998-06-25 2001-06-21 Moretti Mario Polegato Vapor-permeable waterproof sole for shoes
US20070028483A1 (en) * 2005-05-20 2007-02-08 Yoshiaki Miyata Air-permeable shoe
US7337557B2 (en) * 2005-05-20 2008-03-04 Miyata Co., Ltd. Air-permeable shoe

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070296115A1 (en) * 2004-11-08 2007-12-27 Ejner Truelsen Shoe and a Method of Making Shoes
US7743530B2 (en) * 2004-11-08 2010-06-29 Ecco Sko A/S Shoe and a method of making shoes
US20110138655A1 (en) * 2006-12-01 2011-06-16 Ariat International, Inc. Advanced torque stability footbed
US8136266B2 (en) 2006-12-01 2012-03-20 Ariat International, Inc. Advanced torque stability footbed
US20100186264A1 (en) * 2009-01-26 2010-07-29 Cook Christopher S Article of Footwear with Two Part Midsole Assembly
US8196316B2 (en) 2009-01-26 2012-06-12 Nike, Inc. Article of footwear with two part midsole assembly
US20120324758A1 (en) * 2011-06-21 2012-12-27 Tang Hung V Footwear Pressure Elimination & Dipersibility Systematic
US20130167405A1 (en) * 2011-12-30 2013-07-04 4C Golf, Inc. Replaceable heel cushion cavity
US20140259801A1 (en) * 2013-03-15 2014-09-18 New Balance Athletic Shoe, Inc. Multi-Density Sole Elements, and Systems and Methods for Manufacturing Same
US9282785B2 (en) * 2013-03-15 2016-03-15 New Balance Athletic Shoe, Inc. Multi-density sole elements, and systems and methods for manufacturing same
US10238172B2 (en) 2013-03-15 2019-03-26 New Balance Athletics, Inc. Multi-density sole elements, and systems and methods for manufacturing same
US11224264B2 (en) 2013-03-15 2022-01-18 New Balance Athletics, Inc. Multi-density sole elements, and systems and methods for manufacturing same
CN105212427A (en) * 2015-11-14 2016-01-06 际华三五一五皮革皮鞋有限公司 A kind of sole adsorbing PM2.5
US11559106B2 (en) * 2019-10-24 2023-01-24 Nike, Inc. Article of footwear and method of manufacturing an article of footwear

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