WO2008026090A1 - Soudure par impulsions thermiques de materiaux barrieres stratifies thermosensibles - Google Patents

Soudure par impulsions thermiques de materiaux barrieres stratifies thermosensibles Download PDF

Info

Publication number
WO2008026090A1
WO2008026090A1 PCT/IB2007/052602 IB2007052602W WO2008026090A1 WO 2008026090 A1 WO2008026090 A1 WO 2008026090A1 IB 2007052602 W IB2007052602 W IB 2007052602W WO 2008026090 A1 WO2008026090 A1 WO 2008026090A1
Authority
WO
WIPO (PCT)
Prior art keywords
bond
film
gown
layer
film layer
Prior art date
Application number
PCT/IB2007/052602
Other languages
English (en)
Inventor
Mary Katherine Lawson
Michael P. Mathis
John Anthony Rotella
Original Assignee
Kimberly-Clark Worldwide, Inc.
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 Kimberly-Clark Worldwide, Inc. filed Critical Kimberly-Clark Worldwide, Inc.
Priority to MX2009001211A priority Critical patent/MX2009001211A/es
Priority to AU2007290926A priority patent/AU2007290926A1/en
Priority to EP07805048A priority patent/EP2053933A1/fr
Priority to CA002661816A priority patent/CA2661816A1/fr
Publication of WO2008026090A1 publication Critical patent/WO2008026090A1/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D13/00—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches
    • A41D13/12—Surgeons' or patients' gowns or dresses
    • A41D13/1209—Surgeons' gowns or dresses
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D27/00—Details of garments or of their making
    • A41D27/24—Hems; Seams
    • A41D27/245—Hems; Seams made by welding or gluing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/07—Flat, e.g. panels
    • B29C48/08—Flat, e.g. panels flexible, e.g. films
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/38—Impulse heating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
    • B29C66/7234—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a barrier layer
    • B29C66/72343—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a barrier layer for liquids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/729—Textile or other fibrous material made from plastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/818—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps
    • B29C66/8181—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the cooling constructional aspects
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9141—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature
    • B29C66/91411—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature of the parts to be joined, e.g. the joining process taking the temperature of the parts to be joined into account
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/919—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/919—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges
    • B29C66/9192—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges in explicit relation to another variable, e.g. temperature diagrams
    • B29C66/91921—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges in explicit relation to another variable, e.g. temperature diagrams in explicit relation to another temperature, e.g. to the softening temperature or softening point, to the thermal degradation temperature or to the ambient temperature
    • B29C66/91931—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges in explicit relation to another variable, e.g. temperature diagrams in explicit relation to another temperature, e.g. to the softening temperature or softening point, to the thermal degradation temperature or to the ambient temperature in explicit relation to the fusion temperature or melting point of the material of one of the parts to be joined
    • B29C66/91935—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges in explicit relation to another variable, e.g. temperature diagrams in explicit relation to another temperature, e.g. to the softening temperature or softening point, to the thermal degradation temperature or to the ambient temperature in explicit relation to the fusion temperature or melting point of the material of one of the parts to be joined lower than said fusion temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/92—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools
    • B29C66/924—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools
    • B29C66/9241—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force or the mechanical power
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/92—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools
    • B29C66/929—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools characterized by specific pressure, force, mechanical power or displacement values or ranges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/92—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools
    • B29C66/929—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools characterized by specific pressure, force, mechanical power or displacement values or ranges
    • B29C66/9292—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools characterized by specific pressure, force, mechanical power or displacement values or ranges in explicit relation to another variable, e.g. pressure diagrams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/92—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools
    • B29C66/929—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools characterized by specific pressure, force, mechanical power or displacement values or ranges
    • B29C66/9292—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools characterized by specific pressure, force, mechanical power or displacement values or ranges in explicit relation to another variable, e.g. pressure diagrams
    • B29C66/92921—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools characterized by specific pressure, force, mechanical power or displacement values or ranges in explicit relation to another variable, e.g. pressure diagrams in specific relation to time, e.g. pressure-time diagrams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/94—Measuring or controlling the joining process by measuring or controlling the time
    • B29C66/949—Measuring or controlling the joining process by measuring or controlling the time characterised by specific time values or ranges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/82—Testing the joint
    • B29C65/8253—Testing the joint by the use of waves or particle radiation, e.g. visual examination, scanning electron microscopy, or X-rays
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/735—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the extensive physical properties of the parts to be joined
    • B29C66/7352—Thickness, e.g. very thin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9141—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature
    • B29C66/91421—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature of the joining tools
    • B29C66/91423—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature of the joining tools using joining tools having different temperature zones or using several joining tools with different temperatures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/04—Polymers of ethylene
    • B29K2023/06—PE, i.e. polyethylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/10—Polymers of propylene
    • B29K2023/12—PP, i.e. polypropylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2101/00—Use of unspecified macromolecular compounds as moulding material
    • B29K2101/12—Thermoplastic materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/0085—Copolymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
    • B29K2105/08—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of continuous length, e.g. cords, rovings, mats, fabrics, strands or yarns
    • B29K2105/0854—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of continuous length, e.g. cords, rovings, mats, fabrics, strands or yarns in the form of a non-woven mat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
    • B29K2105/16—Fillers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0037—Other properties
    • B29K2995/0065—Permeability to gases
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0037—Other properties
    • B29K2995/0068—Permeability to liquids; Adsorption
    • B29K2995/0069—Permeability to liquids; Adsorption non-permeable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2009/00—Layered products
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/48—Wearing apparel
    • B29L2031/4842—Outerwear
    • B29L2031/485—Jackets

Definitions

  • the over garment is typically a gown that has a main body portion to which sleeves and a tie cord are attached.
  • the tie cord encircles the wearer at the waist to keep the gown in place.
  • the surgical gown prevents bodily fluids and other liquids present during surgical procedures from flowing through the gown.
  • Surgical gowns were originally made of cotton or linen, were reusable and were sterilized prior to each use in the operating room.
  • a disadvantage of the materials used in these types of gowns is that they tend to form lint, which is capable of becoming airborne or clinging to the clothes of the wearer, thereby providing another potential source of contamination. Additionally, costly laundering and sterilization procedures were required before reuse.
  • Disposable surgical gowns have largely replaced the reusable linen surgical gown and many are now made in part or entirely from fluid repellent or impervious fabrics to prevent liquid penetration or "strike through”.
  • Various materials and designs have been used in the manufacture of surgical gowns to prevent contamination in different operating room conditions. Surgical gowns are now available in a variety of different levels of imperviousness and comfort.
  • Gowns made from completely impervious material provide a high degree of protection, though a surgical gown constructed of this type of material is typically heavy, expensive, and uncomfortably hot to the wearer.
  • certain portions such as the shoulders and back panels may be of a lighter weight material in order to provide for better breathability and help reduce the overall weight of the gown.
  • the higher the breathability of the material the lower the repellency of the material.
  • AAMI level 4 used in "critical zones” where exposure to blood or other bodily fluids is most likely and voluminous.
  • the AAMI standards define "critical zones” as the front of the gown, including the tie cord attachment area, and the sleeves and sleeve seam area up to about 2 inches (5 cm) above the elbow.
  • the main body portion and the sleeves of a surgical gown are usually produced separately and joined together in some manner at seams in the shoulder area.
  • the sleeves are commonly made from a flat piece of fabric that is folded upon itself and joined together at a seam that runs the length of the sleeve from the shoulder to the wrist, prior to attachment to the main body portion.
  • a single tie cord or a pair of tie cords is also usually attached to the main body portion of the gown.
  • a single tie cord is used to encircle the wearer at the waist and tie to itself in order to keep the gown in position during use.
  • Two tie cords are also used to encircle the wearer at the waist and tie to each other.
  • the seams and the tie cord attachment point are areas where many gowns have been known to fail the AAMI test procedure.
  • Ultrasonic seam sealing bonds the layers of material together sufficiently for strength but the bonds do not pass ASTM-1671 -b; the bacteriophage penetration resistance test, a test that is now required to meet the new AAMI level 4 protection standards. This is particularly true for the sleeve seams and tie cord attachment point.
  • Figure 1 illustrates an exemplary gown 100 to be worn during a medical procedure as seen from the front.
  • Figure 2 illustrates an exemplary gown 100 to be worn during a medical procedure as seen from the back.
  • Figure 3 represents a exemplary tie cord for a surgical gown.
  • thermal impulse heat welding aka "bar sealing”
  • thermally sensitive laminate barrier materials made of thermoplastic polymers such that they will pass AAMI level 4 testing (ASTM 1670 and 1671-b).
  • AAMI level 4 testing ASTM 1670 and 1671-b.
  • bar sealing overlapping layers of thermally sensitive barrier materials composed of thermoplastic polymers are melted and fused together to create a substantially solid bond at the surface of the materials. No substantially un-melted areas remain within the fused seam area on the surface.
  • the present invention involves the use of bar sealing technology to meet AAMI level 4 barrier properties in surgical gowns and similar articles formed from thermally sensitive laminate barrier materials that are composed of thermoplastic polymers.
  • thermally sensitive laminate barrier materials that are composed of thermoplastic polymers.
  • overlapping layers of these thermally sensitive laminate barrier materials are melted and fused together to create a substantially solid bond at the surface of the materials while avoiding damage to regions below the surface of the laminate. No substantially un-melted areas remain within the fused bond area on the surface where heat was applied.
  • Figure 1 illustrates a typical gown 100 to be worn during a medical procedure as seen from the front.
  • the gown 100 includes a collar 110, the cuffs 120, the primary tie cord 130 and a primary tie cord attachment area 140.
  • the shoulder seams 150 linking the sleeves 160 to the main body 170 are also visible.
  • Figure 2 illustrates a typical gown 100 to be worn during a medical procedure as seen from the back.
  • the shoulder seams 150 linking the sleeves 160 the main body 170 are visible as are the sleeve seams 180 running from the shoulder seams 150 to the cuffs 120 which are used to produce the sleeves160.
  • Figure 2 also shows a secondary tie cord 180 and secondary tie attachment area 190 (not in the AAMI critical zone).
  • Figure 3 represents the tie cord 130 and shows the end to be bonded to the gown 100 as having, in this case, a "Y" shaped end 200 for attachment to the gown 100. Note that a simple flat shaped end may also be used for attachment to the gown, a "Y" shape is not required.
  • Many surgical gowns are made from thermally sensitive laminate barrier materials composed of thermoplastic polymers. While such barrier materials may be in the form of thermoplastic polymer spunbond fabrics, thermoplastic polymer meltblown fabrics, and various combinations of such spunbond and meltblown fabrics, a particularly desirable form of these barrier materials incorporate one or more thin, breathable films that provide desirable levels of resistance to penetration by liquids and pathogens while also providing satisfactory levels of breathability and/or moisture vapor transmission.
  • thermoplastic polyolefins like polyethylene and polypropylene and copolymers thereof because of their relatively low cost and ability to be processed.
  • Polyethylene is generally used in the film production and the film is commonly "filled” with calcium carbonate, various kinds of clay, silica, alumina, barium carbonate, soldium carbonate, magnesium carbonate, talc, barium sulfate, magnesium sulfate, aluminum sulfate, titanium dioxide, zeolites, cellulose-type powders, kaolin, mica, carbon, calcium oxide, magnesium oxide, aluminum hydroxide, pulp powder, wood powder, cellulose derivatives, chitin and chitin derivatives, to increase breathability.
  • the breathable films of barrier laminate are frequently compromised such that they so longer provide desired levels of barrier to liquid penetration and pathogens.
  • the thin and breathable film laminates described above may be thermally bonded using bar sealing, thus producing a thermal bond for a film layer-containing thermoplastic fabric where the bond joins a thermoplastic material to the fabric to form a fused bonded area, without bonding to the film layer. This bond has no un- melted areas remaining within the fused bond area on the surface.
  • Spunbond fibers refers to fabric made from small diameter fibers which are formed by extruding molten thermoplastic material as filaments from a plurality of fine, usually circular capillaries of a spinneret with the diameter of the extruded filaments then being rapidly reduced as by, for example, in US Patent 4,340,563 to Appel et al., and US Patent 3,692,618 to Dorschner et al., US Patent 3,802,817 to Matsuki et al., US Patents 3,338,992 and 3,341 ,394 to Kinney, US Patent 3,502,763 to Hartman, and US Patent 3,542,615 to Dobo et al.
  • Spunbond fibers are generally not tacky when they are deposited onto a collecting surface. Spunbond fibers are generally continuous and have average diameters (from a sample of at least 10) larger than 7 microns, more particularly, between about 10 and 20 microns.
  • meltblown fabric is formed by extruding a molten thermoplastic material through a plurality of fine, usually circular, die capillaries as molten threads or filaments into converging high velocity, usually hot, gas (e.g. air) streams which attenuate the filaments of molten thermoplastic material to reduce their diameter, which may be to microfiber diameter.
  • the meltblown fibers are then carried by the high velocity gas stream and are deposited on a collecting surface to form a web of randomly dispersed meltblown fibers.
  • Meltblown fibers are microfibers which may be continuous or discontinuous, are generally smaller than 10 microns in average diameter, and are generally tacky when deposited onto a collecting surface.
  • Laminates of spunbond and meltblown fabrics e.g., spunbond/meltblown/spunbond (SMS) laminates and others are disclosed in U.S. Patent 4,041 ,203 to Brock et al., U.S. Patent 5,169,706 to Collier, et al, US Patent 5,145,727 to Potts et al., US Patent 5,178,931 to Perkins et al. and U.S. Patent 5,188,885 to Timmons et al.
  • SMS spunbond/meltblown/spunbond
  • Such a laminate may be made by sequentially depositing onto a moving forming belt first a spunbond fabric layer, then a meltblown fabric layer and last another spunbond layer and then bonding the laminate in a manner described below.
  • the fabric layers may be made individually, collected in rolls, and combined in a separate bonding step.
  • Such fabrics usually have a basis weight of from about 0.1 to 12 osy (6 to 400 gsm), or more particularly from about 0.75 to about 3 osy.
  • Multilayer laminates may also have various numbers of meltblown layers or multiple spunbond layers in many different configurations and may include other materials like films (F) or coform materials, e.g. SMMS, SM, SFS, etc.
  • An exemplary method of forming a film includes a co-extrusion film apparatus that forms the film with multiple layers consisting of skin and core layers.
  • the apparatus will include two or more polymer extruders.
  • the film is extruded into a pair of nip or chill rollers.
  • the film is extruded onto a chilled roll which can have a smooth or matte finish.
  • the film as initially formed will have an overall thickness of approximately 25 to 60 micrometers with, in the case of multilayer films, the total skin or bonding layer having an initial thickness that may be about 3% to 30% of the total thickness.
  • Other film making processes known to those skilled in the art may be used as well, including cast embossing, chill and flat casting and blown film processes.
  • the film is directed to a film stretching unit such as a machine direction orienter (MDO), which is a commercially available device from vendors such as the Marshall and Williams Company of Buffalo, R.I.
  • MDO machine direction orienter
  • Such an apparatus has a plurality of paired stretch rolls that move at predetermined speeds that may rotate faster, slower or at the same speed relative to each other.
  • the stretch rolls move at a progressively faster speeds to progressively stretch and thin the film in the machine direction of the film, which is the direction of travel of the film through the process.
  • the stretch rolls are generally heated for processing advantages.
  • the temperatures to which the film is heated while stretching will depend on the composition of the film as well as the breathability and other desired end properties of the laminate. In most cases the film will be heated to a temperature no higher than 5 degrees 0 C. below the melting point of the core or "B" layer in the film.
  • the purpose for heating the film is to allow it to be stretched quickly without causing film defects.
  • the amount of stretching will depend on the polymeric composition, but, in general, the film may be stretched to about 300% or more of its original length (that is, a one cm length, for example, will be stretched to 3 cm) but less than the amount that tends to result in film defects. For most applications, for example, the stretch will be to at least 200% of the original film length and, frequently, in the range of about 250% to 500%.
  • the multilayer stretch-thinned film may be attached to one or more support layers to form a multilayer film/nonwoven laminate as described above.
  • a conventional fibrous nonwoven web forming apparatus such as a pair of spunbond machines, may be used to form the support layer.
  • the long, essentially continuous fibers are deposited onto a forming wire as an unbonded web and the unbonded web is then sent through a pair of bonding rolls to bond the fibers together and increase the tear strength of the resultant web support layer.
  • One or both of the rolls are often heated to aid in bonding.
  • one of the rolls is also patterned so as to impart a discrete bond pattern with a prescribed bond surface area to the web.
  • the other roll is usually a smooth anvil roll but this roll also may be patterned if so desired.
  • the two layers are brought together and laminated to one another using a pair laminating rolls or other means.
  • the laminating rolls may be heated.
  • at least one of the rolls may be patterned to create a discrete bond pattern with a prescribed bond surface area for the resultant laminate.
  • the maximum bond point surface area for a given area of surface on one side of the laminate will not exceed about 50 percent of the total surface area.
  • the process described above may be used to create a three layer laminate.
  • Multilayer film laminates may have various numbers of meltblown layers or multiple spunbond layers in many different configurations and may include other materials like coform materials. These include, for example, spunbond/film/spunbond (SFS) laminates, spunbond/film/meltblown (SFM) laminates, spunbond/meltblown/film (SMF) laminates and laminates having a greater number of layers like spunbond/film/spunbond/meltblown/spunbond (SFSMS) and spunbond/meltblown/film/meltblown/spunbond SMFMS, coform/meltblown/film (CMF) etc.
  • FSS spunbond/film/spunbond
  • SFM spunbond/film/meltblown
  • SMF spunbond/meltblown/film
  • CMF coform/meltblown/film
  • thermally sensitive materials means fabrics and webs which have a tendency to become compromised by heat and/or or pressure. These materials have a relatively narrow range of temperature (the bonding window) at which they can be bonded and can be damaged to a great degree when conditions fall outside of these ranges.
  • a “substantially solid bond” is one in which there are no substantially un- melted areas within the bond footprint. This means that the thermoplastic fibers on the surface have been melted to a degree sufficient to produce a film.
  • the surface film thus produced is the material which results in a bonding together of the two layers that are desired to be bonded.
  • bar sealing can bond a thermoplastic material to a second thermoplastic material that has a film layer within it, without damaging the barrier properties of the film layer. Bar sealing is also substantially less expensive and less challenging in a manufacturing environment than is adhesive bonding.
  • Bar sealing uses heat, pressure and dwell time to thermally bond thermoplastic materials together. According to the present invention, these variables are adjusted 5 so that the thermal bonding takes place substantially at or adjacent the surface of the thermally sensitive barrier laminate materials while avoiding degradation of the thermally sensitive film component in an interior region of the barrier laminate.
  • Bar sealing devices generally have a press with a set of jaws that open (vertically), into which the materials to be bonded are placed. The jaws are heated 0 by, for example, electric resistance heating and the temperature of each may be controlled separately. The pressure at which the jaws come together may also be adjusted for optimal bonding. Lastly, the time for which the jaws are together (the "dwell” or "hover” time) may also be adjusted. A dwell time of zero indicates that the jaws were brought together for an instant and immediately moved apart, i.e., they5 were not held together.
  • the size of jaw is generally about a 1.75 cm (a half inch) wide , producing a bond width of about 0.635 cm (% inch), by about 3.8 cm long (1.5 inches) to about 6.35 cm (2.5 inches) long.
  • the jaw size may be as small as a half centimeter by a centimeter, depending on the o materials to be joined.
  • An exemplary bar sealing device is available from Therm-O-Seal® Corporation of Mansfield, Texas.
  • One such device is a Vertrod® Style Steel frame sealer that has jaws about 1.75 cm wide and 2.54 cm in length and uses electrical resistance heating and water cooling.
  • Another is a Vertrod® style hand-held heat 5 sealer that can produce a bond of 2, 4, 8 or 12 inches (5.1 , 10.16, 20.3 and 30.5 cm) in length and 1/8, 3/16, % and 3/8 inch (0.32, 0.48, 0.64 and 0.95 cm) in width.
  • a bar sealing device is a Vertrod® style table-top vacuum heat sealer producing seals 9, 14, 20, 24 and 30 inches (22.9, 35.6, 50.8, 61 and 76.2 cm) in length and 1/8, 3/16, % and 3/8 inch in width.
  • the process conditions will vary depending on the materials of construction.
  • the current thermoplastic polymeric materials commonly used in disposable gowns and for components such as, for example, tie cords that are presently attached to such disposable gowns are typically nonwoven fabrics formed from polypropylene and/or polyethylene and have a basis weight typically ranging from about 0.5 (17 gsm) to about 1.5 osy (51 gsm).
  • the tie cord material may be a folded 1.0 osy (34 gsm) SMS material made as described above.
  • Fabric for the fabrication of gowns may be, for example, made of random copolymer spunbond, a three layer (Catalloy®/polyethylene/Catalloy®) or "ABA" calcium carbonate filled film, and a spunbond/meltblown/spunbond (SMS) layer.
  • This "SFSMS” may bonded together to form the gown with the SMS against the skin.
  • the spunbond layer and film may have a basis weight of between 0.2 and 1.0 osy (7 and 34 gsm) or more particularly about 0.6 osy (20.3 gsm).
  • the SMS layer may have a basis weight of between 0.5 and 1.5 osy (17 and 51 gsm) or more particularly about 0.75 osy (25.4 gsm).
  • the temperature of the bar sealer should be between 240 and 320 0 F (116 and 160 0 C), the pressure should be between 40 and 80 psi (276 and 552 kPa) and the dwell time should be between 0 and 5 seconds. More particularly, the temperature should be between 260 and 290 0 F (127 and 143 0 C), the pressure should be between 50 and 60 psi (345 and 414 kPa) and the dwell time should be between 1 and 3 seconds.
  • the test uses a penetration test cell available from Wilson Road Machine Shop, Rising Sun, MD.
  • the cell has a capacity of about 60 ml.
  • the specimen acts as a partition separating the challenge fluid from the viewing side of the penetration cell.
  • An annular flange cover with an open area to allow visual observations of the specimen, and a transparent cover are included.
  • the cell body has top port for filling and a drain valve for draining the penetration test cell.
  • Test Method F903 The penetration cell is further specified in Test Method F903.
  • the fabric specimen is placed in the penetration cell with the layer that is normally outermost facing the back (solid flange) part of the cell where the challenge fluid is placed.
  • the cell is filled through the top port with the challenge fluid and observed for 5 minutes. Air is then supplied to the top port and the sample held at 13.8 kPa (2 psig) for 1 minute and the pressure released. If liquid penetration is not yet seen, the sample is allowed to stand for 54 minutes and observed. If 5 bacteriophage is the test fluid, the sample is subsequently assayed using a 0.5 ml sample size onto agar for 6 to 18 hours at 35 to 37 0 C to test for passage of fluid that is not observable to the unaided eye.
  • EXAMPLES 0 Kimberly-Clark MicroCool® surgical gowns are made of random copolymer spunbond, a three layer (Catalloy®/polyethylene/Catalloy®) calcium carbonate filled film, and a spunbond/meltblown/spunbond (SMS) layer.
  • This "SFSMS" is bonded together to form the gown with the SMS against the skin.
  • the random copolymer of which the outermost layer of spunbond material is made is a 2.55 weight percent ethylene-propylene copolymer known as R532 — 35R, from the Dow Chemical Company of Midland, Ml. No treatments are applied to the fabric.
  • the spunbond layer and film each had a basis weight of 0.6 osy (20.3 gsm).
  • the SMS layer had a basis weight of 0.75 osy (25.4 gsm).
  • the tie cord to be bonded to the gown was a folded 1.0 osy (34 gsm) SMS o material.
  • the material was folded either once for a double layer of fabric, or twice for a triple layer of fabric.
  • the outer layer (spunbond) was made from a 2.5 weight percent ethylene-propylene copolymer known as R532 — 35R, from the Dow Chemical Company and the outer layer is treated with an antistat and a fluorochemical to reduce surface tension.
  • R532 — 35R 2.5 weight percent ethylene-propylene copolymer
  • a 5 additional piece of tie cord material was bonded to the tie cord near an end to produce a "Y" shaped end for bonding to the gown on both upper end of the Y.
  • the Y was flattened out onto the gown for bonding at two points on the branches of the Y but near the stem of the Y.
  • a bar sealing device from Therm-O-Seal® of Mansfield, Texas was used. It 0 was a Vertrod® model number 2PF-ST-12004-55HT-WC-CRF-TC-KY-SP. This device had jaws about 1.75 cm wide and 2.54 cm in length and used electrical resistance heating and water cooling. Only the jaw in contact with the tie cord was heated.
  • a double folded SMS tie cord was bonded to a MicroCool® surgical gown at a temperature of 275 to 282 0 F (135 to 139 0 C) at a zero dwell time and 56 psi pressure (386 kPa). The bonded area was tested according to ASTM 1670. Nine out of 11 samples passed and two failed.
  • Example 2
  • a double folded SMS tie cord was bonded to a MicroCool® surgical gown at a temperature of 280 to 286 0 F (138 to 141 0 C) at a zero dwell time and 56 psi pressure (386 kPa). The bonded area was tested according to ASTM 1670. All 11 samples passed Example 3:
  • a double folded SMS tie cord was bonded to a MicroCool® surgical gown at a temperature of 290 to 296 0 F (143 to 147 0 C) at a zero dwell time and 56 psi pressure (386 kPa). The bonded area was tested according to ASTM 1670. Nine out of 11 samples passed and two failed.
  • Example 4
  • Example 2 The samples from Example 2 were tested according to ASTM 1671-b using bacteriophage. Eleven of 11 samples passed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Textile Engineering (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Plasma & Fusion (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Professional, Industrial, Or Sporting Protective Garments (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

Selon l'invention, le soudage par impulsions thermiques ou 'soudage avec barrette chauffée' permet de souder des matériaux barrières stratifiés thermosensibles de sorte qu'ils obtiennent des résultats positifs à l'essai AAMI de niveau 4 (ASTM 1670 et 1671 -b). Dans le soudage avec barrette chauffée, des couches se chevauchant de matériaux barrières stratifiés thermosensibles sont fondues et fusionnées pour former une soudure sensiblement solide au niveau de la surface et/ou adjacente à celle-ci. Il ne reste aucune partie sensiblement non fondue dans la zone de soudure fusionnée de la surface.
PCT/IB2007/052602 2006-08-30 2007-07-03 Soudure par impulsions thermiques de materiaux barrieres stratifies thermosensibles WO2008026090A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
MX2009001211A MX2009001211A (es) 2006-08-30 2007-07-03 Union de impulso termico de materiales de barrera laminados termicamente sensibles.
AU2007290926A AU2007290926A1 (en) 2006-08-30 2007-07-03 Thermal impulse bonding of thermally sensitive laminate barrier materials
EP07805048A EP2053933A1 (fr) 2006-08-30 2007-07-03 Soudure par impulsions thermiques de materiaux barrieres stratifies thermosensibles
CA002661816A CA2661816A1 (fr) 2006-08-30 2007-07-03 Soudure par impulsions thermiques de materiaux barrieres stratifies thermosensibles

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11/512,455 2006-08-30
US11/512,455 US20080120758A1 (en) 2006-08-30 2006-08-30 Thermal impulse bonding of thermally sensitive laminate barrier materials

Publications (1)

Publication Number Publication Date
WO2008026090A1 true WO2008026090A1 (fr) 2008-03-06

Family

ID=38739464

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2007/052602 WO2008026090A1 (fr) 2006-08-30 2007-07-03 Soudure par impulsions thermiques de materiaux barrieres stratifies thermosensibles

Country Status (6)

Country Link
US (1) US20080120758A1 (fr)
EP (1) EP2053933A1 (fr)
AU (1) AU2007290926A1 (fr)
CA (1) CA2661816A1 (fr)
MX (1) MX2009001211A (fr)
WO (1) WO2008026090A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008081350A1 (fr) * 2006-12-28 2008-07-10 Kimberly-Clark Worldwide, Inc. Accessoire d'attache de blouse chirurgicale
WO2018022164A1 (fr) * 2016-07-29 2018-02-01 Avent, Inc. Col pour blouse chirurgicale jetable
US11576449B2 (en) 2016-05-04 2023-02-14 O&M Halyard, Inc. Disposable surgical gown

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100313326A1 (en) * 2009-06-11 2010-12-16 Craig Turner Outer garment
US9833364B2 (en) * 2009-11-11 2017-12-05 Warren J. Null Cast and IV medical shower system

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4255818A (en) * 1979-08-06 1981-03-17 American Hospital Supply Corporation Back opening surgical gown
US5140708A (en) * 1990-03-10 1992-08-25 Repack Surgical Enterpises, Inc. Surgical gowns and pass cards therefor
US5271100A (en) * 1992-08-27 1993-12-21 Tennessee Disposable Medical Products, Inc. Disposable surgical gown
EP0602674A1 (fr) * 1992-12-18 1994-06-22 Kimberly-Clark Corporation Blouse de chirurgien
WO1995026649A1 (fr) * 1994-03-30 1995-10-12 Kimberly-Clark Corporation Blouse de chirurgien et procede de fabrication
JPH1136114A (ja) * 1997-07-15 1999-02-09 Daiei Kk 手術用ガウン
WO2001036188A1 (fr) * 1999-11-16 2001-05-25 Allegiance Corporation Stratifies chirurgicaux jetables, non-tisses et a liaison intermittente
US20070028344A1 (en) * 2005-07-12 2007-02-08 Czajka Francis A Surgical gowns and other protective apparel having color-coding for identifying barrier protection levels and methods of making same

Family Cites Families (38)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3338992A (en) * 1959-12-15 1967-08-29 Du Pont Process for forming non-woven filamentary structures from fiber-forming synthetic organic polymers
US3502763A (en) * 1962-02-03 1970-03-24 Freudenberg Carl Kg Process of producing non-woven fabric fleece
US3341394A (en) * 1966-12-21 1967-09-12 Du Pont Sheets of randomly distributed continuous filaments
US3542615A (en) * 1967-06-16 1970-11-24 Monsanto Co Process for producing a nylon non-woven fabric
US3849241A (en) * 1968-12-23 1974-11-19 Exxon Research Engineering Co Non-woven mats by melt blowing
US3594818A (en) * 1969-01-02 1971-07-27 Kimberly Clark Co Folded belt package for hospital gowns
DE2048006B2 (de) * 1969-10-01 1980-10-30 Asahi Kasei Kogyo K.K., Osaka (Japan) Verfahren und Vorrichtung zur Herstellung einer breiten Vliesbahn
DE1950669C3 (de) * 1969-10-08 1982-05-13 Metallgesellschaft Ag, 6000 Frankfurt Verfahren zur Vliesherstellung
US3648290A (en) * 1970-04-08 1972-03-14 Kendall & Co Operating room gown belting means
US3696443A (en) * 1970-11-16 1972-10-10 Kendall & Co Smock or gown with adjustable belt
US3729747A (en) * 1971-04-29 1973-05-01 N Belkin Hospital garment
GB1453447A (en) * 1972-09-06 1976-10-20 Kimberly Clark Co Nonwoven thermoplastic fabric
US3935596A (en) * 1974-11-06 1976-02-03 Johnson & Johnson Surgical gown with transfer device
US4106120A (en) * 1975-03-24 1978-08-15 Lac-Mac Limited Reversible surgical gown
US4017909A (en) * 1975-10-03 1977-04-19 Robert Brandriff Disposable operating room gown
US3988781A (en) * 1975-12-24 1976-11-02 Will Ross, Inc. Side belted surgical gown or the like
US4171542A (en) * 1978-06-05 1979-10-23 Buckeye Cellulose Corporation Disposable surgical gown with a bib forming a hand support
US4326300A (en) * 1979-06-04 1982-04-27 The Buckeye Cellulose Corporation Belt package with temporarily secured detachable belt end
US4340563A (en) * 1980-05-05 1982-07-20 Kimberly-Clark Corporation Method for forming nonwoven webs
US4395782A (en) * 1981-10-30 1983-08-02 The Buckeye Cellulose Corporation Belt system for surgical gown
US4769261A (en) * 1987-01-08 1988-09-06 Exxon Chemical Patents Inc. Retort pouch and coextruded film therefor
US5188885A (en) * 1989-09-08 1993-02-23 Kimberly-Clark Corporation Nonwoven fabric laminates
US5169706A (en) * 1990-01-10 1992-12-08 Kimberly-Clark Corporation Low stress relaxation composite elastic material
US5271883A (en) * 1990-06-18 1993-12-21 Kimberly-Clark Corporation Method of making nonwoven web with improved barrier properties
US5464688A (en) * 1990-06-18 1995-11-07 Kimberly-Clark Corporation Nonwoven web laminates with improved barrier properties
US5213881A (en) * 1990-06-18 1993-05-25 Kimberly-Clark Corporation Nonwoven web with improved barrier properties
US5050242A (en) * 1990-10-29 1991-09-24 Udell C Leland Hospital gown
US5149576A (en) * 1990-11-26 1992-09-22 Kimberly-Clark Corporation Multilayer nonwoven laminiferous structure
US5145727A (en) * 1990-11-26 1992-09-08 Kimberly-Clark Corporation Multilayer nonwoven composite structure
US5414867A (en) * 1993-08-18 1995-05-16 Tcb California Inc. Disposable garment for use in emergency situations
CA2116081C (fr) * 1993-12-17 2005-07-26 Ann Louise Mccormack Materiau permeable a l'air constitue d'une pellicule et d'un non-tisse colles
TW330217B (en) * 1994-12-20 1998-04-21 Kimberly Clark Co Low gauge films and film/nonwoven laminates
US6309736B1 (en) * 1994-12-20 2001-10-30 Kimberly-Clark Worldwide, Inc. Low gauge films and film/nonwoven laminates
US6037281A (en) * 1996-12-27 2000-03-14 Kimberly-Clark Worldwide, Inc. Cloth-like, liquid-impervious, breathable composite barrier fabric
JP2002220712A (ja) * 2001-01-19 2002-08-09 Uni Charm Corp 使い捨て手術用外衣
US6764566B1 (en) * 2001-12-12 2004-07-20 Kimberly-Clark Worldwide, Inc. Nonwoven filled film laminate with barrier properties
US7320948B2 (en) * 2002-12-20 2008-01-22 Kimberly-Clark Worldwide, Inc. Extensible laminate having improved stretch properties and method for making same
US20050132465A1 (en) * 2003-12-19 2005-06-23 Kimberly-Clark Worldwide, Inc. Surgical gown having an adhesive tab and methods of use

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4255818A (en) * 1979-08-06 1981-03-17 American Hospital Supply Corporation Back opening surgical gown
US5140708A (en) * 1990-03-10 1992-08-25 Repack Surgical Enterpises, Inc. Surgical gowns and pass cards therefor
US5271100A (en) * 1992-08-27 1993-12-21 Tennessee Disposable Medical Products, Inc. Disposable surgical gown
EP0602674A1 (fr) * 1992-12-18 1994-06-22 Kimberly-Clark Corporation Blouse de chirurgien
WO1995026649A1 (fr) * 1994-03-30 1995-10-12 Kimberly-Clark Corporation Blouse de chirurgien et procede de fabrication
JPH1136114A (ja) * 1997-07-15 1999-02-09 Daiei Kk 手術用ガウン
WO2001036188A1 (fr) * 1999-11-16 2001-05-25 Allegiance Corporation Stratifies chirurgicaux jetables, non-tisses et a liaison intermittente
US20070028344A1 (en) * 2005-07-12 2007-02-08 Czajka Francis A Surgical gowns and other protective apparel having color-coding for identifying barrier protection levels and methods of making same

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008081350A1 (fr) * 2006-12-28 2008-07-10 Kimberly-Clark Worldwide, Inc. Accessoire d'attache de blouse chirurgicale
US11576449B2 (en) 2016-05-04 2023-02-14 O&M Halyard, Inc. Disposable surgical gown
WO2018022164A1 (fr) * 2016-07-29 2018-02-01 Avent, Inc. Col pour blouse chirurgicale jetable
AU2017301367B2 (en) * 2016-07-29 2022-09-29 O&M Halyard International Unlimited Company Collar for a disposable surgical gown
US11583013B2 (en) 2016-07-29 2023-02-21 O&M Halyard, Inc. Collar for a disposable surgical gown

Also Published As

Publication number Publication date
AU2007290926A1 (en) 2008-03-06
EP2053933A1 (fr) 2009-05-06
US20080120758A1 (en) 2008-05-29
CA2661816A1 (fr) 2008-03-06
MX2009001211A (es) 2009-02-13

Similar Documents

Publication Publication Date Title
US20080155728A1 (en) Surgical gown tie attachment
US6934969B2 (en) Anti-wicking protective workwear and methods of making and using same
US7549178B2 (en) Patch for securing a surgical gown tie
KR100372067B1 (ko) 차단특성이개선된부직라미네이트
US20050132465A1 (en) Surgical gown having an adhesive tab and methods of use
JP6057044B1 (ja) 防水透湿布帛および感染防護衣
US20080120758A1 (en) Thermal impulse bonding of thermally sensitive laminate barrier materials
JP2005515912A (ja) バリア特性をもつフィラー入り不織ラミネート
WO2021211086A1 (fr) Tissu de protection et vêtements fabriqués à partir de celui-ci
US20240042724A1 (en) Barrier laminates and methods of making the same
US20050132463A1 (en) Surgical gown having adhesive tabs and methods of use
US11001041B2 (en) Heat-sealable, liquid impervious fabric
US11583014B1 (en) Ultra-light nanotechnology breathable gowns and method of making same
MXPA99006194A (en) Stretch-thinned breathable films resistant to blood and virus penetration

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 07805048

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 2007290926

Country of ref document: AU

WWE Wipo information: entry into national phase

Ref document number: MX/A/2009/001211

Country of ref document: MX

ENP Entry into the national phase

Ref document number: 2007290926

Country of ref document: AU

Date of ref document: 20070703

Kind code of ref document: A

WWE Wipo information: entry into national phase

Ref document number: 2009526208

Country of ref document: JP

ENP Entry into the national phase

Ref document number: 2661816

Country of ref document: CA

WWE Wipo information: entry into national phase

Ref document number: 2007805048

Country of ref document: EP

NENP Non-entry into the national phase

Ref country code: DE

NENP Non-entry into the national phase

Ref country code: RU