Classifications

• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
  • C09J167/00—Adhesives based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Adhesives based on derivatives of such polymers
  • C09J167/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
• • 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
  • A43B13/04—Plastics, rubber or vulcanised fibre
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K3/00—Use of inorganic substances as compounding ingredients
  • C08K3/34—Silicon-containing compounds
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
  • C09J167/00—Adhesives based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Adhesives based on derivatives of such polymers
  • C09J167/04—Polyesters derived from hydroxycarboxylic acids, e.g. lactones
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L2666/00—Composition of polymers characterized by a further compound in the blend, being organic macromolecular compounds, natural resins, waxes or and bituminous materials, non-macromolecular organic substances, inorganic substances or characterized by their function in the composition
  • C08L2666/54—Inorganic substances

Definitions

• the present invention relates to a shoe material and more particularly to a shoe material used for reinforcing heel or toe sections of footwear.
• the heel reinforcement is generally referred to as a counter and the toe reinforcement can be referred to as a boxed toe or a toe puff.
• the toe puff can be replaced by a very rigid steel toe cap to provide protection. It should be emphasised that neither counters nor toe puffs are designed to provide foot protection, but are generally utilised to ensure good footwear form during manufacture and sale.
• reinforcing materials within footwear have been made from extruded thermoplastics with a coating of adhesive to facilitate location within the footwear upper components. It will be understood that the reinforcing materials are thermoplastic to allow forming during the manufacturing stages of footwear production. The reinforcing materials are generally heated about a former to produce the desired heel shape and then cooled such that formed shape is retained by the reinforcing material and consequently the shoe upper components.
• Reinforcing materials as described above are generally produced in sheet form and the necessary shaped press cut from that sheet. Thus, there may be large areas of unused sheet after the toe puff or counter elements have been cut therefrom. This wastage may be up to 20% of the sheet area. Obviously, it would be more economical to use more of the sheet if possible or recycle the waste sheet. Unfortunately the adhesive applied to the reinforcing material during manufacture as a sheet can present significant problems if the waste sheet is shredded and the granules re-extruded.
• a reinforcing material for footwear the material
• the base adhesive component is a linear saturated polyester binder/adhesive such as HM5584AE or Esterpons 1112AF produced by Bostik Ltd. , Leicester, England. 50
• the mineral filler may be Mica 60 mesh.
• the copolyester adhesive may be Bostik "T” adhesive or Griltex 8 adhesive produced by EMS-Che i.
• the pigment may be titanium dioxide.
• the extruding material may have a thickness up to 1.5mm. ⁇ ⁇ dependent upon the necessary shoe reinforcement required.
• the reinforcing material should preferably be homogenous such that it is not necessary to provide an adhesive coating in order to bond the reinforcing material to any shoe component.
• the waste j ⁇ reinforcing material can merely be recycled by elevation above its fusion temperature to consolidate the recycled granules etc.
• a combination of a base J5adhesive component or linear saturated polyester binder/ adhesive with a copolyester adhesive is used to create a thermoformable mass as the core of the reinforcing material.
• a mineral filler is provided to a constituent level necessary to achieve desired 20stiffness for the reinforcing material.
• a pigment such as titanium dioxide may be added to provide consistent colour.
• the preferable linear saturated polyester in the present ⁇ in ention is Bostik HM5584AE produced by Bostik Ltd., Leicester, England.
• This polyester-based hot-melt_binder/ adhesive is supplied in a powder form and can be used at a relatively low temperature to form a rigid and tough material.
• This HM5584AE binder/adhesive has a softening point in the JO range 80-90°C and a viscosity of approximately 1000 poise at 230 ⁇ C.
• the initial particle size in the powder is in a distribution range 100-600 ⁇ m.
• copolyester j adhesive tends to have a higher melting temperature than the saturated linear polyester adhesive and thus tends to soften in accordance with conventional phenomena to a lesser degree under heat activation.
• this filler In order to provide stiffness within the reinforcing material it is necessary to provide a filler and generally, due to its low cost, this filler will be of a mineral nature.
• the preferred mineral filler in the present invention is Mica
• IO60 however talc or clay could also be used.
• linear saturated polyester 60-70% linear saturated polyester 60-70%
• copolyester adhesive 5-15% mineral filler 15-30%
• mineral filler 15-30% and an additional, possibly filler type, pigment up to 3%.
• the preferred constitution is linear saturated polyester component 65%, copolyester component 10%,
• the material is extruded to a thickness in the range up to 1.5mm.
• reinforcing material thickness obviously affects the achieved stiffness of the material and the necessary temperatures for moulding.
• both surfaces of the material have an adhesive/bonding nature to any shoe upper components presented thereto. Furthermore, these upper components are
• linear saturated polyester component may be replaced by polycaprolactone as the base adhesive component.
• the waste reinforcing material after component cutting is shredded, granulated or simply placed into an extruder hopper and re-melted.
• the recycled reinforcing material is then extruded as per the original virgin extruded sheet.
• a dome sample of a shoe material in accordance with the present invention comprising, by weight, Bostik HM5584AE 65%, Bostik "T" adhesive 10%, Mica 60 mesh 27.5% and T1O2 2.5% -"having a gauge of 1.3mm. and a weight of 1990g/m 2 was found to have an initial deformation strength, i.e... at first dome collapse, of 13.6kg. and after 10 dome collapses of 5.9kg.
• footwear reinforcing components from a sheet that a powder could be deposited to create the component.
• This powder comprising the constituents of the reinforcing material could be deposited directly on the footwear components or
• 35mechanism could include a sacrificial sheet or a non-stick plate upon which the powder is deposited.
• the powder will generally be deposited using a stencil; the gauge of the stencil determining powder thickness and so reinforcing material strength. Once deposited the powder is activated by heat to consolidate it and so form the reinforcing material. Once cooled, the reinforcing material may be re-activated by heat to be moulded inside the footwear. When a transfer mechanism is used the cooled or still hot reinforcing material shaped by the stencil may be transferred to the footwear.

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• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Organic Chemistry (AREA)
• Engineering & Computer Science (AREA)
• Materials Engineering (AREA)
• Health & Medical Sciences (AREA)
• Medicinal Chemistry (AREA)
• Polymers & Plastics (AREA)
• Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
• Compositions Of Macromolecular Compounds (AREA)

Applications Claiming Priority (3)

Publications (1)

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• 1996
  • 1996-04-09 GB GBGB9607302.8A patent/GB9607302D0/en active Pending
• 1997
  • 1997-04-07 WO PCT/GB1997/000964 patent/WO1997038060A1/en not_active Ceased
  • 1997-04-07 CN CN97193691A patent/CN1215424A/zh active Pending
  • 1997-04-07 EP EP97915611A patent/EP0892837A1/de not_active Withdrawn
  • 1997-04-07 KR KR1019980708002A patent/KR20000005293A/ko not_active Withdrawn
  • 1997-04-08 ID IDP971174A patent/ID16500A/id unknown

Non-Patent Citations (1)

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