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1. WO1996009024 - APPLICATION OF THIN COATINGS ON APERTURED SUBSTRATES

Publication Number WO/1996/009024
Publication Date 28.03.1996
International Application No. PCT/US1995/009292
International Filing Date 24.07.1995
Chapter 2 Demand Filed 14.02.1996
IPC
A61F 13/00 2006.01
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
13Bandages or dressings; Absorbent pads
A61F 13/15 2006.01
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
13Bandages or dressings; Absorbent pads
15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
B29C 51/22 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
51Shaping by thermoforming, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
18Thermoforming apparatus
20having movable moulds or mould parts
22rotatable about an axis
B32B 3/10 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
32LAYERED PRODUCTS
BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
3Layered products essentially comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products essentially having particular features of form
10characterised by a discontinuous layer, i.e. apertured or formed of separate pieces of material
B32B 7/08 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
32LAYERED PRODUCTS
BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
7Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
04Interconnection of layers
08by mechanical means
D04H 13/00 2006.01
DTEXTILES; PAPER
04BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
HMAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING
13Other non-woven fabrics
CPC
A61F 13/00991
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
13Bandages or dressings
00987Apparatus or processes for manufacturing non-adhesive dressings or bandages
00991for treating webs, e.g. for moisturising, coating, impregnating or applying powder
A61F 13/5146
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
13Bandages or dressings
15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body
51characterised by the outer layers
514Backsheet, i.e. the impermeable cover or layer furthest from the skin
51456characterised by its properties
51458being air-pervious or breathable
5146having apertures of perforations
A61F 13/51476
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
13Bandages or dressings
15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body
51characterised by the outer layers
514Backsheet, i.e. the impermeable cover or layer furthest from the skin
51474characterised by its structure
51476being three-dimensional, e.g. embossed, textured, pleated, or with three-dimensional features, like gathers or loops
A61F 13/5148
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
13Bandages or dressings
15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body
51characterised by the outer layers
514Backsheet, i.e. the impermeable cover or layer furthest from the skin
51474characterised by its structure
51478being a laminate, e.g. multi-layered or with several layers
5148having an impervious inner layer and a cloth-like outer layer
B29C 2791/006
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
2791Shaping characteristics in general
004Shaping under special conditions
006Using vacuum
B29C 51/225
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
51Shaping by thermoforming ; , i.e. shaping sheets or sheet like preforms after heating; , e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
18Thermoforming apparatus
20having movable moulds or mould parts
22rotatable about an axis
225mounted on a vacuum drum
Applicants
  • TREDEGAR INDUSTRIES, INC. [US]/[US]
Inventors
  • MCBRIDE, Robert, K.
  • RAY, Carl, D.
  • THOMAS, Paul, E.
Agents
  • PORCELLO, James, F.
Priority Data
08/311,34723.09.1994US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) APPLICATION OF THIN COATINGS ON APERTURED SUBSTRATES
(FR) APPLICATION DE COUCHES MINCES SUR SUBSTRATS A TROUS
Abstract
(EN)
A process for the manufacture of apertured, three-dimensional substrates (32) having an extrusion coating material (30) thereon, the coated substrate (44) and an apparatus for making the coated substrate (44) are disclosed. Successive portions of a continuous sheet of the apertured substrate (32) which has a top surface (34) and a bottom surface (36) are passed into contact with a continuous moving perforated member (40). The coating material (30) is supplied onto the top surface (34) of the continuous moving substrate (32). The bottom surface (36) of the substrate (32) is subjected to a vacuum. The vacuum causes the coating material (30) to flow onto the top surface (34) of the substrate material (32) and in certain embodiments, at least partially into the apertures in the substrate (32). The vacuum is maintained for a period of time sufficient for the coating material (30) to bond to the substrate (32). The coated portions of the substrate (32) are continuously removed from the moving member (40).
(FR)
L'invention se rapporte: à un procédé de fabrication de substrats tridimensionnels à trous (32) comportant un matériau (30) appliqué selon un procédé de couchage par extrusion; au substrat recouvert (44) obtenu; et à un appareil conçu pour former le substrat recouvert (44). Des parties successives d'une feuille continue de substrat à trous (32) qui comporte une surface supérieure (34) et une surface inférieure (36) sont amenées en contact avec un élément perforé (40) à déplacement continu. Le matériau de revêtement (30) est appliqué sur la surface supérieure (34) du substrat (32) se déplaçant en continu. Un vide est appliqué sur la surface inférieure (36) du substrat (32). Le vide provoque l'écoulement du matériau de revêtement (30) sur la surface supérieure (34) du substrat (32) et, dans certains modes de réalisation, au moins partiellement dans les trous du substrat (32). Le vide est maintenu pendant un temps suffisant pour que le matériau de revêtement (30) se fixe au substrat (32). Les parties recouvertes du substrat (32) sont enlevées en continu de l'élément en mouvement (40).
Also published as
Latest bibliographic data on file with the International Bureau