EP0287643A1 - Protective garment material and construction - Google Patents

Protective garment material and construction

Info

Publication number
EP0287643A1
EP0287643A1 EP87907272A EP87907272A EP0287643A1 EP 0287643 A1 EP0287643 A1 EP 0287643A1 EP 87907272 A EP87907272 A EP 87907272A EP 87907272 A EP87907272 A EP 87907272A EP 0287643 A1 EP0287643 A1 EP 0287643A1
Authority
EP
European Patent Office
Prior art keywords
film
layer
substrate
evoh
protective garment
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Withdrawn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
EP87907272A
Other languages
German (de)
French (fr)
Other versions
EP0287643A4 (en
Inventor
James E. Bartasis
Richard L. Mcintire
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.)
BARTASIS James E
McINTIRE Richard L
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 EP0287643A1 publication Critical patent/EP0287643A1/en
Publication of EP0287643A4 publication Critical patent/EP0287643A4/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/50—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like
    • B29C65/5007—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like characterised by the structure of said adhesive tape, threads or the like
    • B29C65/5021—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like characterised by the structure of said adhesive tape, threads or the like being multi-layered
    • 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
    • A41D13/02—Overalls, e.g. bodysuits or bib overalls
    • 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
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D31/00—Materials specially adapted for outerwear
    • A41D31/02—Layered materials
    • 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
    • B29C65/10—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using hot gases (e.g. combustion gases) or flames coming in contact with at least one 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/4805—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the type of adhesives
    • B29C65/481—Non-reactive adhesives, e.g. physically hardening adhesives
    • B29C65/4815—Hot melt adhesives, e.g. thermoplastic adhesives
    • 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
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/50—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like
    • B29C65/5042—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like covering both elements 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
    • B29C66/01—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
    • B29C66/114—Single butt joints
    • B29C66/1142—Single butt to butt 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
    • B29C66/01—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
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/137—Beaded-edge joints or bead seals
    • 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
    • B29C66/71—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
    • B29C66/72—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
    • 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
    • B29C66/01—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
    • B29C66/01—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
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/133—Fin-type joints, the parts to be joined being flexible
    • 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
    • B29K2023/08—Copolymers of ethylene
    • B29K2023/083—EVA, i.e. ethylene vinyl acetate copolymer
    • 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
    • B29K2023/08—Copolymers of ethylene
    • B29K2023/086—EVOH, i.e. ethylene vinyl alcohol copolymer
    • 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
    • B29L2031/768—Protective equipment

Definitions

  • This invention is in the field of protective garments. It relates particularly to disposable gar- ments fabricated of synthetic, thermoplastic materials.
  • laminated materials comprising a film and a substrate are also known in protective garments.
  • materials such as "Tyvek” are conventionally laminated to a film of polyethylene, for example, and made into protective garments.
  • Another object is to provide an improved laminated material for disposable protective garments.
  • Still another object is to provide an improved protective garment material which is stronger, more durable, and affords greater hazardous environment protection than materials presently available.
  • Yet another object is to provide a new and im ⁇ proved protective garment construction.
  • FIG. 1 is a front elevational view of a protective garment embodying features of the present invention
  • FIG. 2 is an enlarged, sectional view through a portion of the garment shown in FIG. 1, illustrating the material composition and the garment construction at a seam;
  • FIG. 3 is a further enlarged sectional view of the circled portion of the material illustrated in FIG. 2;
  • FIG. 4 is a view similar to Fig. 2 showing another form of seam in a garment construction embodying features of the invention. DESCRIPTION OF THE PREFERRED EMBODIMENTS
  • the garment 10 is of the type which might be worn by a worker in a hazardous chemical environment, for example.
  • the garment 10 is fabricated of a synthetic, cloth-like material 11 also embodying features of the present invention.
  • the material 11 is made up of pattern segments preferably bonded along seams 12 by a thermal-bonding process described in French U.S. Patent No. 4,555,293. For reasons which will hereinafter be discussed, the material 11 is particularly well suited for this bonding process.
  • the garment includes a conventional zipper strip 15.
  • the strip 15 may also be bonded to the material 11.
  • the zipper strip 15 opens and closes in a conventional man ⁇ ner to permit the wearer to get in and out of the garment 10.
  • the garment material 11 comprises an outer film 20 of a syn ⁇ thetic material manufactured and sold by the British Petroleu Corporation .
  • the film 20 is laminated to an inner substrate 21 of spun-bonded polyester material.
  • a layer 22 of adhesive is provided between the film 20 and the substrate 21 to enhance the bond between them.
  • Fig. 2 also shows two adjoining edges 30 and 31 of the material 11 bonded together at a seam 12.
  • the seam bond which is here identified gener- ally at 35, is a thermal bond created by the application of pressure and heat in the manner described in the French paten
  • the film 20 is a five-layered product. As seen in Fig. 3, which is a greatly enlarged cross-section of a segment of the garment material 11 encircled in Fig. 2, the film comprises five discrete layers 41, 42, 43, 44, and
  • the first or inner layer 41 of the film 20 is a poly- ethylene layer.
  • the second layer 42 is a "tie layer” of water resistant adhesive resin.
  • the third or center layer is ethylene vinyl alcohol, (EVOH), chemically written as:
  • the fourth layer 44 is another layer of water resistant ad ⁇ hesive resin.
  • the fifth, or outer, layer 45 is another layer of polyethylene.
  • the film 20 has been described in terms of its inner layer 41 and its outer layer 45 being polyethylene. Either or both may also be a polyester according to the present invention, however. In either case the film 20 is a five layer (at least) high barrier film which contains a center layer of EVOH.
  • the film 20 is "Corona” treated before being combined with the substrate
  • the substrate 21 is a spun-bonded polyester material incorporating low temperature binders.
  • the binders may be ethyl vinyl acetate (EVA) , or polyvinyl acetate (PVA) , for example.
  • the substrate 21 is formed, by HDK Indus- tries, Inc., Rogersville, Tenn., using conventional methods, it is calendered on both sides 55 and 56.
  • the side 56 which will be exposed in the garment material 11 is extensively calendered by rolling to press all loose fiber ends into the surface 56 and avoid subsequent "linting".
  • the side 55 which is to adhere to the film 20, is calendered only approximately 70% of the amount of calendering used on side 56, an amount sufficient to provide cross-machine strength to the substrate.
  • the film 20 and the substrate 21 are laminated with the adhesive layer 22 between them.
  • EVA ethyl vinyl acetate
  • a film 20 of two and one-half mils thickness is employed with a two ounce spun bound polyester material substrate 21.
  • the lamination process completes the fabrication of a material 11 having very high barrier characteristics, excellent strength, and structure extremely well suited for thermal bonding to form the seams 12.
  • the thermal bond 35 is formed at edges 31 and 32 of material 11 pattern segments.
  • the thermal pressure bonding process described in the French patent is made particularly effective by the low temperature binder resins in the substrate 21.
  • FIG. 4 a portion of a garment embodying another feature of the invention is illustrated at 110.
  • the garment 110 is made up of material 111 identical to the material 11 hereinbefore discussed. However, the seam 112 is created in a different manner.
  • the seam 112 is made by placing the two edges 131 and 132 into abutting relationship.
  • the film 120 which is identical to the film 20 hereinbefore discussed, is on the outside of the garment material 111.
  • a narrow strip 135 of the same material as the garment material 111 is placed over the abutting material edges 131 and 132 with its film side down.
  • the film strip 135 is then thermal bonded to the film 120 over the abutting edges 131 and 132.
  • the thermal bonding of the strip 135 is carried out in the following manner.
  • the strip 135 is heated by passing it over a Teflon roller heated to approximately 200°F. It is pressed against the Teflon roller by a urethane roller under a pressure of four psi. Air is heated to ⁇ approximately 440°F and blown in a fine jet 'point where the strip 135 and the abutting edges 131 and 132 come together, between the strip and the material 111, before it passes between the rollers.
  • a bond is formed between the strip 135 and the abutting film 120 segments.
  • the seam bond at the strip 135 is of high strength and durability. It is impervious to the hazardous environment. It requires no other thermal bonding (or sewing) of the edges 131 and 132 directly to each other.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Laminated Bodies (AREA)
  • Professional, Industrial, Or Sporting Protective Garments (AREA)
  • Manufacturing Of Multi-Layer Textile Fabrics (AREA)

Abstract

Le vêtement de protection (10) est fabriqué en un matériau (11) qui comprend un film multicouche de barrière dense (20) dans lequel est incorporé EVOH (43) laminé sur un substrat de polyester (21) lié par tissage. Le film (20) est une construction en cinq couches avec une couche de EVOH (43) au milieu, prise en sandwich par des couches de liaison en résine imperméable (42, 44) et des couches externes de polyéthylène ou de polyester (41, 45). Le substrat est formé avec des liants de basse température (EVA), (PVA) et il est calendré des deux côtés, le côté extérieur étant calendré beaucoup plus que le côté intérieur. Le matériau (11) est assemblé au niveau des bords à motif (31, 32), (131, 132) par liaison thermique (12) sous pression ou au moyen d'une bande (135) du film (120) thermolié sur des segments de matériau (111).The protective garment (10) is made of a material (11) which comprises a dense barrier multilayer film (20) in which is incorporated EVOH (43) laminated on a polyester substrate (21) bonded by weaving. The film (20) is a five-layer construction with a layer of EVOH (43) in the middle, sandwiched by bonding layers of waterproof resin (42, 44) and outer layers of polyethylene or polyester (41, 45). The substrate is formed with low temperature binders (EVA), (PVA) and it is calendared on both sides, the outside side being calendared much more than the inside side. The material (11) is assembled at the level of the patterned edges (31, 32), (131, 132) by thermal bonding (12) under pressure or by means of a strip (135) of the film (120) thermally bonded on material segments (111).

Description

PROTECTIVE GARMENT MATERIAL AND CONSTRUCTION
FIELD OF THE INVENTION
This invention is in the field of protective garments. It relates particularly to disposable gar- ments fabricated of synthetic, thermoplastic materials.
BACKGROUND OF THE INVENTION
Many synthetic, cloth-like materials are used in protective garments of one type or another. These materials are conventionally thermoplastic and formed in woven and non-woven configurations. These synthetic cloth-like mater¬ ials include "Tyvek" which is a trademark of E. I. Du Pont de Nemours and Co., Wilmington, Delaware 19898; "Duraguard" and "Safeguard" which are trademarks of Kimberly Clark Corp., Roswell, Georgia 30076; "Celestra" which is a trademark of Crown Zellerback Corp., Washougal, Washington 98671; and "Duralace" which is a trademark of Chicopee Manufacturing Co., Chicopee, Georgia 30501. These materials are utilized as substitutes for cloth and pulp-paper in disposable clothes for medical, industrial and retail markets, as well as for other purposes.
In addition to the foregoing, laminated materials comprising a film and a substrate are also known in protective garments. As described in Goldstein U.S. Patent No. 4,272,851, materials such as "Tyvek" are conventionally laminated to a film of polyethylene, for example, and made into protective garments.
SUMMARY OF THE INVENTION
It is an object of the present invention to pro¬ vide an improved material for disposable protective gar¬ ments.
Another object is to provide an improved laminated material for disposable protective garments.
Still another object is to provide an improved protective garment material which is stronger, more durable, and affords greater hazardous environment protection than materials presently available. . Yet another object is to provide a new and im¬ proved protective garment construction.
BRIEE DESCRIPTION OF THE DRAWINGS
The invention, including its construction and method of fabrication, is illustrated more or less diagrammatically in the drawing, in which:
FIG. 1 is a front elevational view of a protective garment embodying features of the present invention;
FIG. 2 is an enlarged, sectional view through a portion of the garment shown in FIG. 1, illustrating the material composition and the garment construction at a seam; FIG. 3 is a further enlarged sectional view of the circled portion of the material illustrated in FIG. 2; and
FIG. 4 is a view similar to Fig. 2 showing another form of seam in a garment construction embodying features of the invention. DESCRIPTION OF THE PREFERRED EMBODIMENTS
Referring now to the drawing, and particularly to Fig. 1, a protective garment embodying features of the invention is illustrated generally at 10. The garment 10 is of the type which might be worn by a worker in a hazardous chemical environment, for example. The garment 10 is fabricated of a synthetic, cloth-like material 11 also embodying features of the present invention.
The material 11 is made up of pattern segments preferably bonded along seams 12 by a thermal-bonding process described in French U.S. Patent No. 4,555,293. For reasons which will hereinafter be discussed, the material 11 is particularly well suited for this bonding process.
The garment includes a conventional zipper strip 15. The strip 15 may also be bonded to the material 11. The zipper strip 15 opens and closes in a conventional man¬ ner to permit the wearer to get in and out of the garment 10.
Referring now to Fig. 2, an enlarged cross-section of a portion of the garment 10 is illustrated, at a seam 12. The garment material 11 comprises an outer film 20 of a syn¬ thetic material manufactured and sold by the British Petroleu Corporation . The film 20 is laminated to an inner substrate 21 of spun-bonded polyester material. A layer 22 of adhesive is provided between the film 20 and the substrate 21 to enhance the bond between them.
Fig. 2 also shows two adjoining edges 30 and 31 of the material 11 bonded together at a seam 12. As has been pointed out, the seam bond, which is here identified gener- ally at 35, is a thermal bond created by the application of pressure and heat in the manner described in the French paten
The film 20 is a five-layered product. As seen in Fig. 3, which is a greatly enlarged cross-section of a segment of the garment material 11 encircled in Fig. 2, the film comprises five discrete layers 41, 42, 43, 44, and
45.
The first or inner layer 41 of the film 20 is a poly- ethylene layer. The second layer 42 is a "tie layer" of water resistant adhesive resin. The third or center layer is ethylene vinyl alcohol, (EVOH), chemically written as:
-(CH2-CH2>m<CH2-CH>n-
OH
The fourth layer 44 is another layer of water resistant ad¬ hesive resin. The fifth, or outer, layer 45 is another layer of polyethylene.
The film 20 has been described in terms of its inner layer 41 and its outer layer 45 being polyethylene. Either or both may also be a polyester according to the present invention, however. In either case the film 20 is a five layer (at least) high barrier film which contains a center layer of EVOH.
According to the invention, the film 20 is "Corona" treated before being combined with the substrate
21. This involves electronically pitting one surface 51 of the film 20 by a "Corona" process well known in the art. This is done to make the film 20 adhere better to the substrate 21 when they are laminated. „ The substrate 21 is a spun-bonded polyester material incorporating low temperature binders. The binders may be ethyl vinyl acetate (EVA) , or polyvinyl acetate (PVA) , for example.
While the substrate 21 is formed, by HDK Indus- tries, Inc., Rogersville, Tenn., using conventional methods, it is calendered on both sides 55 and 56. The side 56 which will be exposed in the garment material 11 is extensively calendered by rolling to press all loose fiber ends into the surface 56 and avoid subsequent "linting".
The side 55, which is to adhere to the film 20, is calendered only approximately 70% of the amount of calendering used on side 56, an amount sufficient to provide cross-machine strength to the substrate.
The film 20 and the substrate 21 are laminated with the adhesive layer 22 between them. The adhesive layer 22, which is an ethyl vinyl acetate (EVA) resin, is a thin layer applied to the film 20 before lamination.
In practice, a film 20 of two and one-half mils thickness is employed with a two ounce spun bound polyester material substrate 21. The lamination process completes the fabrication of a material 11 having very high barrier characteristics, excellent strength, and structure extremely well suited for thermal bonding to form the seams 12.
As seen in Fig. 2, the thermal bond 35 is formed at edges 31 and 32 of material 11 pattern segments. The thermal pressure bonding process described in the French patent is made particularly effective by the low temperature binder resins in the substrate 21.
Referring now to FIG. 4, a portion of a garment embodying another feature of the invention is illustrated at 110. The garment 110 is made up of material 111 identical to the material 11 hereinbefore discussed. However, the seam 112 is created in a different manner.
The seam 112 is made by placing the two edges 131 and 132 into abutting relationship. The film 120, which is identical to the film 20 hereinbefore discussed, is on the outside of the garment material 111. According to the invention a narrow strip 135 of the same material as the garment material 111 is placed over the abutting material edges 131 and 132 with its film side down. The film strip 135 is then thermal bonded to the film 120 over the abutting edges 131 and 132.
The thermal bonding of the strip 135 is carried out in the following manner. The strip 135 is heated by passing it over a Teflon roller heated to approximately 200°F. It is pressed against the Teflon roller by a urethane roller under a pressure of four psi. Air is heated to ■ approximately 440°F and blown in a fine jet 'point where the strip 135 and the abutting edges 131 and 132 come together, between the strip and the material 111, before it passes between the rollers.
A bond is formed between the strip 135 and the abutting film 120 segments. The seam bond at the strip 135 is of high strength and durability. It is impervious to the hazardous environment. It requires no other thermal bonding (or sewing) of the edges 131 and 132 directly to each other.

Claims

I CLAIM:
1. A material for a protective garment comprising: a) a film including a layer of EVOH; and b) a substrate laminated to the film.
2. The material of Claim 1 further, characterized in that: a) said substrate is a non-woven material.
3. The material of Claim 1 further characterized in that: ! a) said film is a five layer, high barrier film; and b) the outer layer, on each side of the film is polyethylene.
' 4. The material of Claim 2 further characterized in that: j a) said substrate is a spun bonded polyester including a low temperature binder, relative to the melting temperature of the polyester.
5. The material of Claim 4 further characterized in that: a) said -substrate is calendered on both sides, with one side being calendered substantially more than the other side.
6. A protective garment, comprising: a) a material including a high barrier film laminated to a spun bonded polyester substrate; and b) said material having segment edges which are thermal bonded together under pressure.
7. The protective garment of Claim 6 further characterized in that: a) said material film is a five layer structure having a layer of EVOH at the center, bracketing layers of an EVA adhesive, and outer layers of polyethylene.
* 8. A protective garment, comprising: a) a material segment including an outer film including at least five layers with a layer of EVOH and an outer • layer selected from a class comprising polyethylene and polyester; b) another material segment of the same composition: c) said material segments having edges positioned adjacent each other to form a seam; and d) a strip of film including at least five layers with a layer of EVOH and an outer layer selected from a class comprising polyethylenes and polyesters; e) said strip being thermal bonded to said two material segments over said seam.
EP19870907272 1986-10-20 1987-10-20 Protective garment material and construction. Withdrawn EP0287643A4 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US92036186A 1986-10-20 1986-10-20
US920361 1986-10-20

Publications (2)

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EP0287643A1 true EP0287643A1 (en) 1988-10-26
EP0287643A4 EP0287643A4 (en) 1990-05-14

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EP (1) EP0287643A4 (en)
JP (1) JPH01501160A (en)
KR (1) KR890700005A (en)
WO (1) WO1988002604A1 (en)

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US4831664A (en) * 1987-05-14 1989-05-23 Redi-Corp Protective Materials, Inc. Garment for protecting against environmental contamination
WO1991007278A1 (en) * 1989-11-17 1991-05-30 W.L. Gore & Associates, Inc. Thin seam sealing tape
BR0007687A (en) 1999-01-25 2002-01-29 3M Innovative Properties Co Process of adhesion of an adhesive-coated film to a substrate having a surface, article to soften a film and adhere the film to a surface of a substrate, process to save labor of adhesion of an adhesive-coated film to a substrate having a surface , e, kit for applying films to a substrate
US9855732B2 (en) 1999-01-25 2018-01-02 3M Innovative Properties Company Method of applying adhesive coated film
WO2003068010A1 (en) * 2002-02-15 2003-08-21 Kuraray Co., Ltd. Chemical-resistant protective clothes
US8778122B2 (en) * 2006-06-29 2014-07-15 3M Innovative Properties Company Adhering graphic films on irregular substrates
US8347438B2 (en) * 2008-09-29 2013-01-08 Nike, Inc. Footwear uppers and other textile components including reinforced and abutting edge joint seams
JP5959004B2 (en) * 2012-09-14 2016-08-02 株式会社重松製作所 Bonding method for chemical protective clothing

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FR968895A (en) * 1948-02-25 1950-12-08 Wingfoot Corp Fabric assembly process
FR1160512A (en) * 1956-11-12 1958-07-17 Improvements made to the <<seam>> lines of an assembly of coated or similar pieces of fabric, in particular for making protective clothing
FR90562E (en) * 1965-07-23 1968-01-05 Waterproof complex sheet
US3547765A (en) * 1966-08-10 1970-12-15 Harold I Snyder Multiple-layer fabric for protective garments and the like
GB2046171A (en) * 1979-04-06 1980-11-12 Woodroof Lab Inc Fabric Elastomer Composite
WO1983003205A1 (en) * 1982-03-12 1983-09-29 Henning Risvig Henriksen Protective garment
DE3312464A1 (en) * 1983-04-07 1984-10-11 Aquata Gesellschaft für Wassersport und Meerestechnik mbH &Co, 1000 Berlin Process for the connection of joints
EP0180671A1 (en) * 1981-07-07 1986-05-14 E.I. Du Pont De Nemours And Company Protective clothing
US4608114A (en) * 1984-04-10 1986-08-26 Queen Light Of Electronic Industries Ltd. Seal tape sticking device

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US4555293A (en) * 1983-07-26 1985-11-26 French Robert C Method and apparatus for thermo-bonding seams in thermoplastic material

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FR968895A (en) * 1948-02-25 1950-12-08 Wingfoot Corp Fabric assembly process
FR1160512A (en) * 1956-11-12 1958-07-17 Improvements made to the <<seam>> lines of an assembly of coated or similar pieces of fabric, in particular for making protective clothing
FR90562E (en) * 1965-07-23 1968-01-05 Waterproof complex sheet
US3547765A (en) * 1966-08-10 1970-12-15 Harold I Snyder Multiple-layer fabric for protective garments and the like
GB2046171A (en) * 1979-04-06 1980-11-12 Woodroof Lab Inc Fabric Elastomer Composite
EP0180671A1 (en) * 1981-07-07 1986-05-14 E.I. Du Pont De Nemours And Company Protective clothing
WO1983003205A1 (en) * 1982-03-12 1983-09-29 Henning Risvig Henriksen Protective garment
DE3312464A1 (en) * 1983-04-07 1984-10-11 Aquata Gesellschaft für Wassersport und Meerestechnik mbH &Co, 1000 Berlin Process for the connection of joints
US4608114A (en) * 1984-04-10 1986-08-26 Queen Light Of Electronic Industries Ltd. Seal tape sticking device

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See also references of WO8802604A1 *

Also Published As

Publication number Publication date
JPH01501160A (en) 1989-04-20
EP0287643A4 (en) 1990-05-14
KR890700005A (en) 1989-03-02
WO1988002604A1 (en) 1988-04-21

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