EP2312963A2 - Méthode de fabrication d'une chaussure et d'une semelle intermédiaire utilisant une structure d'inserts à deux états - Google Patents

Méthode de fabrication d'une chaussure et d'une semelle intermédiaire utilisant une structure d'inserts à deux états

Info

Publication number
EP2312963A2
EP2312963A2 EP08841995A EP08841995A EP2312963A2 EP 2312963 A2 EP2312963 A2 EP 2312963A2 EP 08841995 A EP08841995 A EP 08841995A EP 08841995 A EP08841995 A EP 08841995A EP 2312963 A2 EP2312963 A2 EP 2312963A2
Authority
EP
European Patent Office
Prior art keywords
hardness
midsole
shoe
low
polyurethane
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.)
Withdrawn
Application number
EP08841995A
Other languages
German (de)
English (en)
Other versions
EP2312963A4 (fr
Inventor
Myung Kye Jang
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
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP2312963A2 publication Critical patent/EP2312963A2/fr
Publication of EP2312963A4 publication Critical patent/EP2312963A4/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B13/00—Soles; Sole-and-heel integral units
    • A43B13/02—Soles; Sole-and-heel integral units characterised by the material
    • A43B13/026—Composites, e.g. carbon fibre or aramid fibre; the sole, one or more sole layers or sole part being made of a composite
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B13/00—Soles; Sole-and-heel integral units
    • A43B13/38—Built-in insoles joined to uppers during the manufacturing process, e.g. structural insoles; Insoles glued to shoes during the manufacturing process
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B13/00—Soles; Sole-and-heel integral units
    • A43B13/02—Soles; Sole-and-heel integral units characterised by the material
    • A43B13/12—Soles with several layers of different materials
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B13/00—Soles; Sole-and-heel integral units
    • A43B13/02—Soles; Sole-and-heel integral units characterised by the material
    • A43B13/12—Soles with several layers of different materials
    • A43B13/125—Soles with several layers of different materials characterised by the midsole or middle layer
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B13/00—Soles; Sole-and-heel integral units
    • A43B13/02—Soles; Sole-and-heel integral units characterised by the material
    • A43B13/12—Soles with several layers of different materials
    • A43B13/125—Soles with several layers of different materials characterised by the midsole or middle layer
    • A43B13/127—Soles with several layers of different materials characterised by the midsole or middle layer the midsole being multilayer
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B13/00—Soles; Sole-and-heel integral units
    • A43B13/14—Soles; Sole-and-heel integral units characterised by the constructive form
    • A43B13/143—Soles; Sole-and-heel integral units characterised by the constructive form provided with wedged, concave or convex end portions, e.g. for improving roll-off of the foot
    • A43B13/145—Convex portions, e.g. with a bump or projection, e.g. 'Masai' type shoes
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B13/00—Soles; Sole-and-heel integral units
    • A43B13/38—Built-in insoles joined to uppers during the manufacturing process, e.g. structural insoles; Insoles glued to shoes during the manufacturing process
    • A43B13/40—Built-in insoles joined to uppers during the manufacturing process, e.g. structural insoles; Insoles glued to shoes during the manufacturing process with cushions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D35/00—Producing footwear
    • B29D35/12—Producing parts thereof, e.g. soles, heels, uppers, by a moulding technique
    • B29D35/14—Multilayered parts
    • B29D35/142—Soles

Definitions

  • the present invention relates to a health shoe including a midsole having a dual insert structure and a method of manufacturing the same, and, more particularly, to a health shoe including a midsole having a dual insert structure, in which the midsole is formed by joining low-hardness polyurethane and middle-hardness polyurethane together through a foaming process and thus the shoe is not hydrolyzed and has excellent cushioning properties, and to a method of manufacturing the same.
  • a shoe in order to minimize the impact occurring when a shoe comes into contact with the ground, a shoe is provided with a sole assembly including a midsole which has relatively low hardness and which is formed at a predetermined thickness, and an outsole which has higher hardness than the midsole and which is placed beneath the midsole.
  • the midsole is generally made of polyurethane foam or ethylene-vinyl acetate (EVA) foam in order to absorb impact, and the outsole is made of a rubber material in consideration of friction between the outsole and the ground and durability.
  • EVA ethylene-vinyl acetate
  • the former method is problematic in that the process is complicated, a process of preparing an air bag or air gel is additionally required, and additional costs are also required, and in that, when the midsole, air bag and air gel are used for a long period of time, they become deformed, and thus an inherent impact absorbing function is not suitably exhibited.
  • a method of preparing polyurethane foam for a midsole includes the steps of placing a polyurethane raw material into a mold and then closing the mold, foaming the polyurethane raw material by heating the upper and lower plates of the mold using the upper and lower hot plate of a polyurethane molding machine to form polyurethane foam, and opening the mold and then separating the polyurethane foam from the mold.
  • an object of the present invention is to provide a shoe having excellent cushioning properties, which can overcome the problem of hydrolysis by enabling an inner polyurethane layer having low hardness and an outer polyurethane layer having middle hardness to be easily joined to each other without using an additional adhesive.
  • an aspect of the present invention provides a shoe including a midsole having a dual insert structure, the midsole including: a hard nylon injection piece layer; a low-hardness (30C) polyurethane layer covering the nylon injection piece layer; and a middle-hardness (55-60C) polyurethane layer covering the low-hardness polyurethane layer.
  • another aspect of the present invention provides a method of manufacturing a midsole having a dual insert structure included in a shoe, including: fabricating a hard nylon injection piece (SlO); inserting the hard nylon injection piece into a mold and then introducing a low-hardness polyurethane material into the mold to form a low-hardness polyurethane foam (S20); and inserting the low-hardness polyurethane foam covering the hard nylon injection piece into the mold and then introducing a middle-hardness polyurethane material into the mold to form a middle-hardness polyurethane foam covering the low-hardness polyurethane foam (S30).
  • SlO hard nylon injection piece
  • S20 low-hardness polyurethane foam
  • S30 middle-hardness polyurethane foam covering the low-hardness polyurethane foam
  • FIG. 1 is a perspective view showing a shoe according to the present invention
  • FIG. 2 is a schematic view showing a midsole according the present invention
  • FIG. 3 is a sectional view of a nylon injection piece layer of the midsole of the present invention.
  • FIG. 4 is a sectional view of a low hardness polyure thane layer of the midsole of the present invention.
  • FIG. 5 is a sectional view of a middle hardness polyurethane layer of the midsole of the present invention.
  • FIG. 6 is a flowchart showing a process of manufacturing the midsole according to the present invention. Best Mode for Carrying out the Invention
  • a shoe of the present invention includes an upper 10 constituting a top part of the shoe, a midsole 20 constituting a cushion part of the shoe, and an outsole 30 covering the midsole and constituting a bottom part of the shoe.
  • the midsole 20 includes three layers, that is, a hard nylon injection piece layer 21, a low-hardness (30C) polyurethane layer 22 covering the hard nylon injection piece layer, and a middle-hardness (55-60C) polyurethane layer 23 covering the low- hardness polyurethane layer.
  • a method of manufacturing the midsole of the shoe includes the steps of: fabricating a hard nylon injection piece (SlO); inserting the hard nylon injection piece into a mold and then introducing a low-hardness polyurethane material into the mold to form a low -hardness polyurethane foam (S20); and inserting the low-hardness polyurethane foam covering the hard nylon injection piece into the mold and then introducing a middle-hardness polyurethane material into the mold to form a middle- hardness polyurethane foam covering the low-hardness polyurethane foam (S30).
  • the midsole of the shoe is manufactured by inserting the hard nylon injection piece into a mold and then introducing a low-hardness polyurethane material into the mold to form a low-hardness polyurethane foam, and then inserting the low-hardness polyurethane foam covering the hard nylon injection piece into the mold and then introducing a middle-hardness polyurethane material into the mold to form a middle-hardness polyurethane foam covering the low-hardness polyurethane foam, the human body is not influenced by discontinuous impact occurring when the shoe comes into contact with the ground.
  • a hard nylon injection piece layer 21 is inserted into a mold for low-hardness polyurethane, and then a low-hardness polyurethane layer 22 is inserted into the mold to form low-hardness (30C) polyurethane foam.
  • the hard nylon injection piece layer 21 is inserted into the mold, and then a non foamed low-hardness polyurethane material is introduced into the mold, and then a foam- forming process is performed at a predetermined temperature and pressure to form the low-hardness polyurethane foam.
  • the hardness of the material is adjusted by the control of foaming properties due to the change in the temperature and pressure of the mold.
  • the "low hardness” means a hardness of about 30C in a Shore C type hardness meter.
  • the low-hardness polyurethane foam is inserted into a mold for middle-hardness polyurethane, and then a middle-hardness polyurethane material is introduced into the mold, then a foaming process is performed to form middle- hardness polyurethane foam.
  • the middle-hardness polyurethane foam is inserted into the mold and then foam-formed at a predetermined temperature and pressure.
  • the "middle hardness” means a hardness of 55-60C in a Shore C type hardness meter.
  • the shoe including the midsole manufactured by the above method has excellent elasticity and stability, and is very light and cushioned. Further, in the shoe, since the low-hardness (30C) polyurethane layer 22 is not joined to the middle-hardness (55-60C) polyurethane layer 23 with an adhesive, the hydrolysis of the shoe can be prevented, and the low-hardness polyurethane layer or middle-hardness polyurethane layer is 2/3 lighter than other polyurethane.
  • the impact strength applied to the low-hardness polyurethane layer 22 is inversely proportional to the area of the bottom of a foot, and is proportional to the weight of the human body pressing the ground.
  • These polyfunctional groups are formed into compounds having a structure of [-NHCOO-] , which is a urethane bond, while n generating high-temperature heat.
  • compounds having a molecular weight of 1000 or more are referred to as polyurethane.
  • Allophanate & Biuret reaction The urea formed by the polyurea reaction and active hydrogen remaining in the urea are reacted with excess isocyanate under suitable conditions to form allophanate and biuret, which is a crosslinking reaction.
  • Uretidinedion & Isocyanurate reaction Isocyanates are reacted with each other in the presence of a basic catalyst to form uretidinedion as a dimer and isocyanurate as a trimer.
  • the dimer is produced from aromatic isocyanate.
  • 4,4-diphenylmethane diisocyanate which is monomeric MDI, is slowly dimerized at room temperature and thus formed into an insoluble polymer material at high temperature.
  • Isocyanurate is formed by heating aliphatic and aromatic isocyanates, and this heating reaction is accelerated by a basic catalyst.
  • MDI is a material obtained by treating diphenylmethane diamine (MDA) formed by condensing aniline and formaldehyde with phosgene (COCl ).
  • MDA diphenylmethane diamine
  • COCl phosgene
  • the reaction product includes various isomers and coenocytes, but pure MDI (crude MDI) is separated therefrom by refining the reaction product. Since monomeric MDI is a white solid at room temperature, it is modified into liquid MID, such as carbodiimide- modified MDI or uretonimine-modified MDI, and then used. Polymeric MDI is liquid at room temperature.
  • the product has an average functional group number of about 2.3 ⁇ 3.0, and is characterized by viscosity, reactivity and NCO content.
  • the viscosity of the product depends on its average molecular weight and NCO content.
  • Monomeric MDI is chiefly used in nonfoamy polyurethane products such as Spandex, synthetic leather, elastomer, coating, sealant, and the like.
  • Polymeric MDI is widely used to manufacture polyurethane foam used for insulation materials for refrigerators, containers, sprays and buildings, and interior materials for automobiles.
  • the shoe according to the present invention is advantageous in that since a midsole includes two different polyurethane layers, that is, a polyurethane layer having low hardness and a polyurethane layer having middle hardness, the midsole can completely absorb the impact transferred from the ground when it comes into contact with the ground, and thus the impact is not transferred to an ankle or knee joint.
  • the shoe according to the present invention is advantageous in that, since the midsole is formed by joining low-hardness polyurethane and middle-hardness polyurethane together without using an additional adhesive, the shoe is not hydrolyzed, thereby increasing the lifespan of the shoe.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)

Abstract

L'invention porte sur une chaussure présentant une semelle intermédiaire à double insert comprenant: une couche formée d'une pièce injectée en nylon dur; une couche de polyuréthane de faible dureté recouvrant la couche de nylon; et une couche de polyuréthane de dureté moyenne recouvrant la couche de polyuréthane de faible dureté. La chaussure est avantageuse en ce que, la semelle intermédiaire comportant deux couches de polyuréthane différentes, c'est-à-dire une couche de polyuréthane de faible dureté et une couche de polyuréthane de dureté moyenne, elle peut complètement absorber l'impact du contact avec le sol, qui ainsi n'est pas transféré à la cheville ou à l'articulation du genou. La chaussure de l'invention est en outre avantageuse en ce que la semelle intermédiaire étant formée par assemblage des deux couches de polyuréthane sans utiliser d'adhésif additionnel, la chaussure n'est pas hydrolysée, ce qui en accroît la durée de vie.
EP08841995.7A 2008-08-12 2008-10-09 Méthode de fabrication d'une chaussure et d'une semelle intermédiaire utilisant une structure d'inserts à deux états Withdrawn EP2312963A4 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020080078724A KR101116485B1 (ko) 2008-08-12 2008-08-12 2중 삽입 구조물의 미드솔을 갖는 건강신발 및 제조방법
PCT/KR2008/005923 WO2009054626A2 (fr) 2008-08-12 2008-10-09 Méthode de fabrication d'une chaussure et d'une semelle intermédiaire utilisant une structure d'inserts à deux états

Publications (2)

Publication Number Publication Date
EP2312963A2 true EP2312963A2 (fr) 2011-04-27
EP2312963A4 EP2312963A4 (fr) 2013-08-28

Family

ID=40580215

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08841995.7A Withdrawn EP2312963A4 (fr) 2008-08-12 2008-10-09 Méthode de fabrication d'une chaussure et d'une semelle intermédiaire utilisant une structure d'inserts à deux états

Country Status (3)

Country Link
EP (1) EP2312963A4 (fr)
KR (1) KR101116485B1 (fr)
WO (1) WO2009054626A2 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2342145B1 (es) * 2010-01-05 2011-05-30 Garridosa, S.L. Suela para calzado.
US8951816B2 (en) 2010-03-18 2015-02-10 Semiconductor Energy Laboratory Co., Ltd. Film forming method
WO2011114872A1 (fr) 2010-03-18 2011-09-22 株式会社半導体エネルギー研究所 Procédé de dépôt et procédé de fabrication d'un substrat de dépôt
KR101258603B1 (ko) * 2011-01-18 2013-04-26 (주)알와이엔코리아 3스텝 워킹 롤링 신발 구조
KR101467460B1 (ko) * 2013-10-22 2014-12-01 정상옥 미끄럼방지 기능을 갖는 신발 겉창
ITUB20151297A1 (it) * 2015-05-27 2016-11-27 Diadora Sport S R L Suola per calzature sportive
CN110477520A (zh) * 2019-09-10 2019-11-22 东莞市佳浩新材料有限公司 一种热熔胶膜复合鞋垫的生产工艺

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4561195A (en) * 1982-12-28 1985-12-31 Mizuno Corporation Midsole assembly for an athletic shoe
EP0795280A2 (fr) * 1996-03-15 1997-09-17 Shimano Inc. Noyau d'une chaussure de cyclisme, procédé et dispositif de moulage pour sa fabrication
EP0990397A1 (fr) * 1998-10-02 2000-04-05 Mizuno Corporation Design et conception d'une semelle intermédiaire de chaussure d'athlétisme
WO2005090062A1 (fr) * 2004-03-23 2005-09-29 Wooyun Co., Ltd Sole using multiple injection molding and its manufacturing method
WO2008044854A1 (fr) * 2006-10-12 2008-04-17 Tae Sung Lee Semelle pour article chaussant
KR100828908B1 (ko) * 2007-12-06 2008-05-09 장명계 3중 구조물의 미드솔 구조를 갖는 건강신발 및 미드솔제조방법

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4561140A (en) * 1983-09-23 1985-12-31 New Balance Athletic Shoe, Inc. Sole construction for footwear
KR890000902B1 (ko) * 1984-09-03 1989-04-13 스끼호시 가세이 가부시끼가이샤 미드소울
US5901468A (en) 1997-04-01 1999-05-11 Whyte; Robert S. Flexible foot support insert for athletic shoe, and the like

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4561195A (en) * 1982-12-28 1985-12-31 Mizuno Corporation Midsole assembly for an athletic shoe
EP0795280A2 (fr) * 1996-03-15 1997-09-17 Shimano Inc. Noyau d'une chaussure de cyclisme, procédé et dispositif de moulage pour sa fabrication
EP0990397A1 (fr) * 1998-10-02 2000-04-05 Mizuno Corporation Design et conception d'une semelle intermédiaire de chaussure d'athlétisme
WO2005090062A1 (fr) * 2004-03-23 2005-09-29 Wooyun Co., Ltd Sole using multiple injection molding and its manufacturing method
WO2008044854A1 (fr) * 2006-10-12 2008-04-17 Tae Sung Lee Semelle pour article chaussant
KR100828908B1 (ko) * 2007-12-06 2008-05-09 장명계 3중 구조물의 미드솔 구조를 갖는 건강신발 및 미드솔제조방법

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2009054626A2 *

Also Published As

Publication number Publication date
WO2009054626A3 (fr) 2009-06-25
WO2009054626A2 (fr) 2009-04-30
KR20100020078A (ko) 2010-02-22
KR101116485B1 (ko) 2012-02-29
EP2312963A4 (fr) 2013-08-28

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