CN1283977A - Methods of bonding materials, esp. materials used in absorbent articles - Google Patents

Methods of bonding materials, esp. materials used in absorbent articles Download PDF

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Publication number
CN1283977A
CN1283977A CN98813318A CN98813318A CN1283977A CN 1283977 A CN1283977 A CN 1283977A CN 98813318 A CN98813318 A CN 98813318A CN 98813318 A CN98813318 A CN 98813318A CN 1283977 A CN1283977 A CN 1283977A
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CN
China
Prior art keywords
joint
decorative pattern
roller
cloth
pattern element
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.)
Granted
Application number
CN98813318A
Other languages
Chinese (zh)
Other versions
CN1209083C (en
Inventor
罗纳德·R·麦克福尔
乔纳森·L·里夫
格雷格·L·伍兹
威尔弗里德·M·科尔纳
约翰·L·哈蒙斯
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.)
Procter and Gamble Ltd
Procter and Gamble Co
Original Assignee
Procter and Gamble Ltd
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
Priority claimed from US08/979,980 external-priority patent/US6045544A/en
Priority claimed from US08/979,979 external-priority patent/US5928452A/en
Priority claimed from US09/031,352 external-priority patent/US5916205A/en
Application filed by Procter and Gamble Ltd filed Critical Procter and Gamble Ltd
Publication of CN1283977A publication Critical patent/CN1283977A/en
Application granted granted Critical
Publication of CN1209083C publication Critical patent/CN1209083C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8351—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws
    • B29C66/83511—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws jaws mounted on rollers, cylinders or drums
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/28—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding involving assembly of non-flat intermediate products which are flattened at a later step, e.g. tubes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS 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
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/15577—Apparatus or processes for manufacturing
    • A61F13/15699—Forming webs by bringing together several webs, e.g. by laminating or folding several webs, with or without additional treatment of the webs
    • 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
    • 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
    • B29C65/74—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area
    • B29C65/743—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc
    • B29C65/7441—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc for making welds and cuts of other than simple rectilinear form
    • 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
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/21—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being formed by a single dot or dash or by several dots or dashes, i.e. spot joining or spot welding
    • 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
    • B29C66/432—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms
    • B29C66/4322—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms by joining a single sheet to itself
    • 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
    • B29C66/433—Casing-in, i.e. enclosing an element between two sheets by an outlined seam
    • B29C66/4332—Casing-in, i.e. enclosing an element between two sheets by an outlined seam by folding a sheet over
    • 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
    • B29C66/436—Joining sheets for making articles comprising cushioning or padding materials, the weld being performed through the cushioning material, e.g. car seats
    • 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
    • B29C66/727—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 porous, e.g. foam
    • 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
    • B29C66/7394—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 thermoset
    • 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
    • B29C66/814—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 design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—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 design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81427—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 design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single ridge, e.g. for making a weakening line; comprising a single tooth
    • B29C66/81429—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 design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single ridge, e.g. for making a weakening line; comprising a single tooth comprising a single tooth
    • 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
    • B29C66/814—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 design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—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 design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81433—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 design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined being toothed, i.e. comprising several teeth or pins, or being patterned
    • 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
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
    • B29C66/83411—Roller, cylinder or drum types
    • 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
    • B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
    • 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
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    • 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
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    • B29C66/80—General aspects of machine operations or constructions and parts thereof
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    • B29C66/812—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 composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/8126—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 composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/81264—Mechanical properties, e.g. hardness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C66/80—General aspects of machine operations or constructions and parts thereof
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    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
    • B29C66/83411—Roller, cylinder or drum types
    • B29C66/83413—Roller, cylinder or drum types cooperating rollers, cylinders or drums
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • 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
    • B29K2995/007—Hardness
    • 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
    • B29L2031/4871—Underwear
    • B29L2031/4878—Diapers, napkins

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Manufacturing & Machinery (AREA)
  • Animal Behavior & Ethology (AREA)
  • Epidemiology (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Laminated Bodies (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
  • Adhesives Or Adhesive Processes (AREA)

Abstract

Methods of bonding materials used in the manufacture of articles, including, but not limited to, absorbent articles such as sanitary napkins, pantiliners, tampons, absorbent interlabial devices, diapers, incontinence devices, wipes, and the like are disclosed. There are numerous aspects of the disclosed methods. In one aspect, the method involves bonding through incompatible materials during the process of making a composite structure comprising several materials. In another aspect, improvements are made that allow the method to be used to bond through relatively thick materials (e.g., materials having a thickness of greater than or equal to about 4 mm). In another aspect, the methods are provided with the ability to create a virtually unlimited number of bonding patterns in the materials to be bonded. In still another aspect, the methods of bonding utilize a compression step to improve bond formation. In still another aspect, methods of bonding that utilize a step of slitting a material through which the bonds are made are disclosed.

Description

The joint method of material is especially for the material in the absorbent device
Invention field
Though method described here can be used for being bonded on the material that other forms of articles for use use, in general, the present invention relates to be used for the joint method of the material of absorbent device.In a preferred embodiment, the present invention relates to be used for make such as sanitary towel absorbent device between panty-liners, tampon, lip, the method for class absorbent devices such as diaper, incontinence article.
Background technology
Such as absorbent device, disposable diaper, incontinence article and binder one class absorbent device between sanitary towel, panty-liners, tampon, lip, be to be designed for liquid and other Excretas that absorb and keep discharging from human body, and prevent to make dirty health and clothes.
When making absorbent device,, generally the ingredient that forms this absorbent device must be bonded together in order to form final finished product.The conventional method that engages this material comprises use bonding agent, heat and/or pressure, and ultrasound wave.
Yet some material is because the integrity of its structure or the relation of composition can not utilize these general joint methods to engage.For example, authorize people's such as Des Marais No. 5260345, United States Patent (USP) on November 9th, 1993, December in 1993 was authorized people's such as DesMarais No. 5268224, United States Patent (USP) on the 7th, authorize with February 7 nineteen ninety-five described in people's such as Dyer No. 5387207, the United States Patent (USP), by the hygroscopic foam material (or " HIPE " foamed materials) that high inner phase emulsion is made, be exactly a kind of material of this form.In general, the low and/or poor structural integrity of the tensile strength of this material.Because the structural intergrity of this material does not have the bonding agent joint so strong, therefore be difficult to utilize the bonding this material of bonding agent.As a result, have only a part of material that directly contacts, can bond together with other materials with bonding agent.The remainder of this material just is easy to separate with bonding material.Because this foamed materials is the polymer of heat setting, therefore can not engage with the method for thermal bonding.After in case this material is made, just can not refuse.On the contrary, when heat acted on this foamed materials, this material can burn, rather than resembled and melt required concerning thermal bonding and flow.Because the foamed materials of this heat setting can not flow and melt under pressure, therefore can not this foamed materials be engaged with pressure.
The United States Patent (USP) that JIUYUE in 1984 was authorized being entitled as of Haq " contain and strengthen and the porous polymeric material of heat seal mateiral " on the 25th has illustrated a kind of method that material is engaged with the porous polymer material of making through the polymerization of high inner phase emulsion before for No. 4473611.Material described in the Haq document can be by adding thermoplastic cellulosic, graininess or foraminate material and form heat seal.The articles for use of wiping cloth one class for example can be by being clipped in improved porous polymer material between two thermosealed substrates, heat seal reinforcing material heat seal in these first and second substrates and the intermediary porous polymeric material is got up and makes.Yet the method for the manufacturing porous polymer material described in the Haq patent needs to add thermoplastic.This makes the process of making this porous polymer material become complicated.
The other forms of material that is used to make absorbent device generally includes thermoplastic.Authorized United States Patent (USP) people such as Ball, that be entitled as " dynamic mechanical interface method and device " on August 8th, 1989 and announce for No. 4854984 and a kind of a plurality of thin slices are sent to by the skew of the pressurized between two rollers gap, and with multi-disc thin slice mechanical engagement method and apparatus together dynamically.At least one roller has ridge design in these two rollers.Method described in people's patents such as Ball has obtained great success in commerce is used.But, still continue to seek improving one's methods of material joint.
Therefore, still need to seek to improve grafting material, particularly be used in the method for the material in the absorbent device.For example, need seek a kind of joint can not improving one's methods with known joint method material that engage, that be used for absorbent device; Specifically, promptly a kind ofly need in the material of being discussed, not add thermoplastic, so that the method that engages with other materials.In addition, also need to seek in making the absorbent device process, to engage the method for thicker material.In addition, also need a kind of can be in the material that will engage, form the joint method of the bonding pattern that is actually unlimited more number.
The present invention's summary
Though method described here also can be used for engaging the material that is used in the other forms of articles for use, in general, the present invention aims to provide the method that multiple joint is used in the material in the absorbent device.This class operating position of all of method described here all can be thought within the scope of the invention.In a preferred embodiment, the present invention relates to be used for make such as sanitary towel panty-liners, tampon, absorbent device between lip, diaper, the method for a class absorbent device such as incontinence article.
The present invention has many aspects.One aspect of the present invention relates to and a kind ofly comprises in the composite construction process of different materials the method for the material of joining non-compatible in manufacturing.Terminology used here " inconsistent material " is meant the very difficult material that engages with other materials with common joint method.Another aspect of the present invention relate to the thicker material of joint (for example thickness more than or equal to about 2,3 or the material of 4mm) improve one's methods.Another aspect of the present invention relates to and can form the joint method of the bonding pattern that is actually unlimited more number in the material that will engage.Another aspect of the present invention relates to the joint method that adopts compression step to improve joint.Another aspect of the present invention relates to the method that the step of cutting by the material that adopts the joint that formation is passed engages.
Should be appreciated that to be to represent at the embodiment described in the description with the form of preferred embodiment in order not make description long.It is also understood that the present invention and not only be confined to these embodiment.The various aspects that it is also understood that method described here can be combined in the independent process; Or can use separately; Or make up in any desirable mode.It is also understood that the inventor thinks, the combination of all these uses of the present invention or these aspects of the present invention may constitute some independent inventions that may be awarded patent, and therefore, these scopes of invention will be the same with the scope of prior art wide.These scopes of invention only are subjected to the restriction of claims, and are not subjected to the restriction of preferred embodiment described here.
The method of joining non-compatible material preferably includes the following step:
(a) be provided at the material that has incompatibility to a certain degree at least when using usual way, incompatible material has first joint capacity, first surface and second surface;
(b) provide at least a joint capacity the other materials higher than first joint capacity;
(c) utilize the described at least a joint capacity material higher to cover at least a portion on first and second surfaces of incompatible material than first joint capacity; With
(d) adopt the joint penetrate described incompatible material, material at least a portion, that joint capacity is higher that makes the described first surface that covers described incompatible material is joined together with material at least a portion, that joint capacity is higher of the described second surface that covers described incompatible material.
According to this aspect of method described here, incompatible material preferably includes hygroscopic material.In a preferred embodiment, incompatible material is the polymer hygroscopic foam material of heat setting.The higher material of joint capacity can comprise many suitable materials, and these materials include, but are not limited to: one or more the web material width of cloth, glue layer or silicone coatings.In the preferred embodiment of the polymer hygroscopic foam material that an incompatible material is heat setting, the higher material of joint capacity is a kind of nonwoven web.
The present invention also provides a kind of manufacturing process of material, particularly compressible material, for example is used in such as the hygroscopic material in the one class absorbent devices such as absorbent device, diaper, incontinence article, wiping cloth between sanitary towel, panty-liners, tampon, lip.This aspect of the method according to this invention impresses out bonding pattern on compressible incompatible material, the part of incompatible material and its remainder are kept apart, and isolated part is made unique shape.The shaping of method described here can comprise one or more folding steps.Many other application of method described here also will understand that.
Brief description of drawings
Though there are claims of specifically noting formation theme of the present invention and clearly proposing claim at the end of this description, by the explanation of carrying out below in conjunction with accompanying drawing, the present invention may be better understood.Wherein:
Fig. 1 is the perspective view that comprises the material composite web of inconsistent hygroscopic foam material, adopts method of the present invention, and inconsistent hygroscopic foam material is engaged and make sanitary towel's moisture absorption pipe;
Fig. 2 be utilize optional, but the preferred step of making the moisture absorption pipe makes the hygroscopic material of composite web form shown in Figure 1 the perspective view of the device of granular material;
Fig. 3 is the fragmentary, perspective view of composite web make granular material after sending device shown in Figure 2 to and with inconsistent hygroscopic foam material after, shown in Figure 1;
Fig. 4 is in the first selectivity folding step, the perspective view of the composite web shown in Figure 3 after the side surplus is folded;
Fig. 5 is the perspective schematic view of the composite web shown in Figure 3 after folding in the second selectivity folding step;
Fig. 6 is the perspective schematic view of the composite web shown in Figure 5 after each several part is bonded together;
Fig. 7 is the cutaway view of the simplification by the composite web shown in Figure 6 of getting along a junction of the 7-7 line of Fig. 6;
Fig. 8 is the perspective schematic view of an embodiment of step that is used to engage sanitary towel's hygroscopic material pipe of this method, and wherein, embossing roller is with the method representation of simplifying;
Fig. 9 is the partial schematic diagram of the simplification of the bigger material of the thickness in the gap that is illustrated between embossing roller and the anvil block roller, wherein, does not have compressible material around the projection piece of embossing roller;
Figure 10 is in the gap that is illustrated between embossing roller and the anvil block roller, and the partial schematic diagram of the simplification of the material that thickness is bigger wherein, has compressible material around the projection piece of embossing roller;
Figure 11 has the perspective view on surface of the existing dynamic joint roller of step load supporting member for expression;
Figure 12 is the perspective view that is used in the surface of embossing roller among the embodiment of method of the present invention, that have successive load supporting member;
Figure 13 is towards health one side, has the perspective view of the combined type sanitary towel of the hygroscopic material pipe that utilizes method of the present invention to engage and be shaped;
Figure 14 utilizes method of the present invention for expression, the sketch map of the another kind of method that two kinds of inconsistent materials are bonded together;
Figure 15 be utilize method of the present invention to engage and the lip that is shaped between the perspective view of absorbent device;
Figure 16 is the perspective view that is used to make the modification of the method for the present invention of absorbent device between lip;
Figure 17 is a partial plan layout of utilizing a kind of sanitary towel of method manufacturing of the present invention;
Figure 18 is the schematic cross sectional view of the part of sanitary towel shown in Figure 17.
Detailed description of the present invention
Although method described here can be used for engaging the material that is used in the other forms of articles for use, But the present invention relates to a kind of joint method of the material for absorbent device. The preferred embodiments of the present invention Relate to for the manufacture of such as absorbent device, diaper, incontinence between sanitary napkin, panty-liners, tampon, lip The method of the absorbent device of one class such as articles for use, wiping cloth.
The present invention has many aspects. One aspect of the present invention relates to and a kind ofly comprises several materials in manufacturing In the composite construction process of material, the method for the material of joining non-compatible. Terminology used here " phase not The material that holds " refer to be difficult to the material that engages with other materials with common joint method. Of the present invention Another aspect relates to the thicker material of joint, and (for example thickness is more than or equal to about 2,3 or 4mm Improving one's methods material). Another aspect of the present invention relates to and can in the material that will engage, form Be actually the joint method of the bonding pattern of unlimited more number. Another aspect of the present invention relates to employing Compression step improves the joint method of joint. Another aspect of the present invention relates to by adopting shape The method that the step that the material of the joint that becomes to pass cuts engages.
Should be appreciated that to be to represent at the embodiment described in the description with the form of preferred embodiment in order not make description long.It is also understood that the present invention and not only be confined to these embodiment.The various aspects that it is also understood that method described here can be combined in the independent process; Or can use separately; Or make up in any desirable mode.It is also understood that the inventor thinks, the combination of all these uses of the present invention or these aspects of the present invention may constitute some independent inventions that may be awarded patent, and therefore, these scopes of invention will be the same with the scope of prior art wide.These scopes of invention only are subjected to the restriction of claims, and are not subjected to the restriction of preferred embodiment described here.
In special preferred embodiment, can utilize material joint method described here, form absorbent device (or other forms of articles for use), or the part of absorbent device.By using joint method, external force is applied on the each several part of articles for use articles for use are shaped, and make articles for use have unique 3D shape.
1. be used to make the explanation of a non-limiting example of method of the present invention of the hygroscopic material pipe of combined type sanitary towel
Method of the present invention can be used for engaging the many different materials that are used in many multi-form articles for use (comprising absorbent device).Fig. 1-Fig. 8 represents a kind of advantageous applications of method of the present invention.Fig. 1-Fig. 8 represents to be used to make the method for the hygroscopic material pipe on health one side that is placed on the base mat that constitutes a kind of combined type sanitary towel.Combined type sanitary towel comprises main menopad (hygroscopic material pipe), and menopad is connected with briefs-protecting piece (base mat).The hygroscopic material pipe utilizes method of the present invention to engage and is shaped.Final assembled watch is shown among Figure 13.
Accompanying drawing is illustrated in and engages (with afterwards) before the material step include the hygroscopic material pipe, the many steps that carry out.Should be appreciated that these steps be optionally, here because they are useful in making absorbent product shown in Figure 13, so they are showed.Under all situations that uses method of the present invention, do not need to comprise these optionally steps.It is also understood that method of the present invention is not Fig. 1-method shown in Figure 8 that only limits to, Fig. 1-method shown in Figure 8 be one exemplary.
A. the assembling of assembly
Fig. 1 illustrates the composite web of utilizing method of the present invention to engage and be configured as the material 20 of the moisture absorption pipe that is used for sanitary towel shown in Figure 13.The composite web of material 20 shown in Figure 1 comprises first material with the joining non-compatible that uses usual way (for example bonding agent, heat and/or pressure and ultrasound wave) to carry out, for example first net width of cloth of material 22.Therefore, the first net width of cloth of material 22 can be described as " material of joining non-compatible " or " the net width of cloth of inconsistent material " again.The net width of cloth of incompatible material 22 has first surface 22A and second surface 22B.
Inconsistent first material 22 can be any suitable material.Though, utilize method of the present invention can engage nonhygroscopic basically incompatible material, best, the net width of cloth of incompatible material 22 is a hygroscopic material.The net width of cloth of incompatible material 22 can be, but not be must be compressible and/or resilient.Best, according to this aspect of the invention, first material 22 is compressible and resilient porous hygroscopic material.First material neither only limit to the material of net width of cloth form.First material 22 can have any suitable form.For example, the form of first material 22 can be cluster of grains or coma, lamination, one or more layers, ribbon, sheet material, block or net width of cloth form.In order to make hygroscopic material pipe shown in the drawings, first material 22 is net width of cloth form preferably.
The net width of cloth of incompatible material 22 has first joint capacity (engaging or easy difficulty or ease or the degree that engages with it of other materials with other materials).The net width of cloth of incompatible material 22 can but be not must be incompatible fully with traditional joint method.For example, the net width of cloth of incompatible material can be that other materials just utilizes these methods to be not easy a kind of material that engages with it.The joint capacity of material can make material and joint separate needed power by measurement, perhaps engages needed power with another kind of material and determines.According to this definition, in the power that can make two kinds of material strip ofves or the structural intergrity of incompatible material is destroyed under the effect of required power (no matter the two who occur earlier), material will separate.
The net width of cloth of incompatible material 22 can be because one or more former thereby other materials are not easy the material that engages with it.Usually, because the relation of the structural intergrity of this material or composition, this material and common joint method are incompatible.The porous polymer hygroscopic foam material of being made by high inner phase emulsion (or " HIPE " foamed materials) is a type of this incompatible material.Hygroscopic foam material with these characteristics has explanation in patent documentation, these documents comprise, but be not limited only to following patent: No. 5260345, United States Patent (USP) authorizing people such as DesMarais on November 9th, 1993, December in 1993 was authorized people's such as DesMarais No. 5268224, United States Patent (USP) on the 7th and is authorized people's such as Dyer No. 5387207, United States Patent (USP) February 7 nineteen ninety-five.The tensile strength of this material is low, and/or poor structural integrity, and/or prerupture elongation is little.
Because the structural intergrity of this material does not have the abutting edge strong, therefore be difficult to use bonding agent that other materials is engaged with this hygroscopic foam material.As a result, have only the part of the incompatible material that directly contacts to engage with other materials with bonding agent.The material that the remainder of incompatible material is easy to be engaged with it separates.In addition, because the foamed materials described in the above-mentioned patent is the polymer of heat setting, so these foamed materialss can not make with the method for thermal bonding with other materials and engage.In case these materials are made, they can not refuse.On the contrary, when heat was added on these foamed materialss, these materials can burn, rather than the needed fusing of thermal bonding and mobile.In addition, because the foamed materials of heat setting can not flow and melt under pressure, so these foamed materialss can not be used engage pressure.
Therefore, the net width of cloth of inconsistent material 22 is called the material that is not easy to engage again.In some cases, also can be described as can not be thermosealed, do not have thermoplastic material; And/or the material of poor structural integrity.The use that it is also understood that incompatible material just is only important at the joint method this respect that relates to incompatible material of the present invention.Here other aspects of described method are not to use incompatible material.Described these other aspect, can use any suitable material that comprises various hygroscopic materials.
In the embodiment shown in the figures, the net width of cloth of incompatible material 22 is the foamed materials net width of cloth of moisture absorption, for example a kind of in the foamed materials described in the above-mentioned patent.The net width of cloth of the incompatible material 22 in embodiment illustrated in fig. 1 is wrapped on the second net width of cloth of material 24 at least in part.The second net width of cloth of material 24 has the second high joint capacity of joint capacity than the net width of cloth of incompatible material 22.That is: utilize common joint method, material can more easily engage with other materials (or material itself).The second net width of cloth of material 24 can be described as " the carrier web width of cloth " or " the pieceable net width of cloth " again.In the embodiment shown in fig. 1, preferably the second net width of cloth of material 24 is wrapped in around the net width of cloth of incompatible material 22 fully, makes the cross section of the second net width of cloth of material 24 become " e " font collapsed shape.
The second net width of cloth of material 24 can be to engage with itself with heat or pressure, bonding agent or ultrasound wave, or be any material that employed some other materials engages in the various forms absorbent device described here at least.The second net width of cloth of material 24 can be made by various material, for example: textile material and non-woven material; Polymeric material such as the thermoplastic film of the plastic sheeting of porose shaping thermoplastic film, porose or atresia and hydroforming; Perforated foams, reticulated foam; Netted thermoplastic film; With the thermoplastic scrim.Suitable weaving and non-woven material can be by natural fiber (for example, the wood fiber or cotton fiber), synthetic fibers (for example, the polymer fiber of polyester, polypropylene or polyethylene fibre one class), bicomponent fibre (promptly, fuse is a kind of material, and the shell that wraps in the outside is the fiber of another kind of material), or the constituting of natural fiber and synthetic fibers.Best, in an illustrated embodiment, the second net width of cloth of material 24 comprises thermoplastic at least in part.Yet in other embodiments, if when particularly using bonding agent or other forms of joint method, the second net width of cloth of material 24 does not need to comprise thermoplastic.For example, the second net width of cloth of material 24 can be a kind of cellulosic material that can engage with itself by hydrogen bonding.
In yet another embodiment, the second net width of cloth of material 24 can replace with a kind of material that is different from web material width of cloth form.For example, the second net width of cloth of material 24 can be with pieceable layer; Or such as the glue layer that is squeezed into, or the coating that is coated in polymer coating one class on the net width of cloth of incompatible material 22 replaces.Glue, particularly hot-melt adhesive are to use this aspect of method of the present invention to engage with the thermoplastic similarity.The silicones that some silicones, particularly fusing point are very low also can engage as mentioned above like that.For this reason, the second net width of cloth of material 24 can be called " second material ", and like this, obviously, material comprises the material that is not the net width of cloth.
Shown in preferred embodiment in, second material 24 preferably includes the material that is applicable to as the packing of the hygroscopic material of absorbent device.What for example, second material 24 can be used as the hygroscopic material that holds absorbent device holds the net width of cloth, the covering of absorbent device or top flat, or the egative film of absorbent device.For Fig. 1-Fig. 8 and embodiment shown in Figure 13, second material 24 comprises by what spunbond non-woven material was made and holds the net width of cloth.A kind of particularly preferred spunbond non-woven material is Fiberweb, North America ofWashougal, and WA company sells 19 gram/sign indicating numbers of NO.0.65MLPV60U (or " P-9 ") product of d 2(22.5g/m 2) spunbond polypropylene non-woven material.Another kind of particularly preferred non-woven material is Corovin GmbH, Peine, and the spunbond polyethylene non-woven material that is called COROLIND that Germany company sells, it has two kinds quantitatively: 23gsm and 30gsm.
Though, the second net width of cloth of material 24 is wrapped in around the net width of cloth of incompatible material 22 with the shape that is folded into the e font, but should understand, if use the net web materials, then the second net width of cloth of material 24 is not to only limit to be wrapped in around the net width of cloth of incompatible material 22 to be folded into the e glyph shape.Relation between the second net width of cloth of the net width of cloth of incompatible material 22 and material 24 preferably, joint capacity than the high web material width of cloth of the net width of cloth joint capacity of incompatible material 22 just at least near two facing surfaces of the net width of cloth of incompatible material 22 (for example, shown in Figure 1 22A and 22B).Like this, in other embodiments, the second net width of cloth of material 24 can be partly folding, or partly is wrapped in around the net width of cloth of incompatible material 22.Can the be any suitable shape of the second net width of cloth of material 24 folding or be wrapped in incompatible material 22 around.Other shapes that are fit to include, but are not limited to be folded into C glyph shape etc.
In addition, the second net width of cloth of material 24 might not be limited to a single net width of cloth of the net width of cloth that wraps up incompatible material 22.The net width of cloth of one or more materials can be placed near each surperficial 22A of the net width of cloth of incompatible material 22 and the place of 22B.For example, in other embodiments, the separate mesh width of cloth of two second materials 24 can be arranged, one of them net width of cloth is near each surperficial 22A and 22B of the net width of cloth of incompatible material 22.Two net width of cloth of second material 24 can be the materials of same form, and have identical characteristic.In other embodiments, two net width of cloth of the material of each surperficial 22A of the net width of cloth of close incompatible material 22 and 22B can be inequality.For example, two net width of cloth can be dissimilar materials, or the identical but characteristic difference (for example, thickness etc.) of the fundamental type of material.
In yet another embodiment, the net width of cloth of second material 24 need not the same wide or equally long net width of cloth with the net width of cloth of incompatible material 22.For example, second material 24 can be a ribbon, bar, fragment or be positioned at the form of the sheet on the ideal position at abutment.Therefore, the first film 22A of the net width of cloth of 24 need coverings of second material incompatible material 22 and the part of second surface 22B.
B. Ren Xuan intermediate steps
(1) be granular material with inconsistent material forming
In the preferred embodiment of the method for the manufacturing hygroscopic material pipe of Fig. 1～shown in Figure 8, before engaging and being shaped, when the net width of cloth of incompatible material 22 is positioned at the material 24 second net width of cloth when inner, the net width of cloth of incompatible material 22 is made granular material.This can submit to people's such as RonaldR.McFall name according on February 20th, 1998, be entitled as " manufacture method fluting or the graininess hygroscopic material " have the method described in No. 09/027379, the U.S. Patent application series of commonly-assigned us with the present invention and carry out.
In this case, preferably not only its joint capacity is than the joint capacity height of the net width of cloth of incompatible material 22 for the second net width of cloth of material 24, and the breaking yield point of the second net width of cloth of material 24 is higher than the breaking yield point of the net width of cloth of incompatible material 22.This step (inconsistent material is made granular material) is an optional step, carries out before the in demand engagement step when it is preferably in the hygroscopic material pipe of making sanitary towel shown in Figure 13.Also should understand, incompatible material is made the step of granular material, be not to only limit to carry out before engagement step.Another kind of scheme is, if desired, with incompatible material make granular material step can with engagement step simultaneously, or carry out later in engagement step.The reason of preferred this optional step is discussed in more detail below.
The optional procedure of incompatible material 22 being made granular material comprises several steps.Though this optional process (and used device) has several embodiment, Fig. 2 that a preferred embodiment of process and device is shown.Process shown in Figure 2 and device be to be used for by making incompatible material 22 distortion with mechanical means, and incompatible material 22 is made granular material.
First step is to form one " the carrier web width of cloth " (in described embodiment, the second net width of cloth of material 24 plays the carrier web width of cloth) that has at the first breaking yield point under the pulling force effect.Then, the web material width of cloth (in this case, being the net width of cloth of inconsistent foam absorbent material 22) and the carrier web width of cloth of making granular material are made a composite construction, for example composite web 20.The breaking yield point of the carrier web that the second breaking yield point of foam absorbent material 22 under the pulling force effect made than adhesive-bonded fabric 24 is low.Therefore, when preparing joint method described here, initial two steps that incompatible material 22 made granular material have just been finished.
Adopt a kind of device that makes above-mentioned composite web 20 distortion with mechanical means.Device preferably at least an one element have the structure of embossed surface.Best, utilize this device, embossed surface is pressed on the composite web 20, make composite web 20 produce mechanically deform, thereby make foam absorbent material 22 form granular material at least in part, and the carrier web width of cloth (the second net width of cloth of material 24) does not form granular material.
The device 30 that makes composite web 20 produce mechanically deform shown in Figure 2 comprises two pairs of cylindrical roller, i.e. first pair of rollers 32 and second pair of rollers 62.Each roller all has embossed surface.These decorative patterns are preferably formed by many bumps and negative area on the roller, thereby form many leg-of-mutton teeth.Authorize on May 21st, 1996 in the United States Patent (USP) 5518801 people, that be entitled as " net web materials " such as Chappell, understand as first pair of rollers 32 in the device shown in Figure 2 and the suitable embossing roller (though not being) of second pair of rollers 62 in detail for incompatible material is become granular material with elastic property.
Shown in preferred embodiment in, the lance tooth on two rollers of first pair of rollers 32 is preferably by forming around the bump and the negative area of roller circumference.The cross section of tooth is preferably isosceles triangle.If desired, the top of tooth rounding a little.Top roller 34 in first pair of rollers 32 and bottom roller 36 alignment make the bump 38 of top roller 34 align with the negative area 40 of bottom roller 36.The lance tooth that forms bump on the top roller 34 and the negative area on the bottom roller 36 is spaced from each other, these teeth can not be contacted with each other or " engagement " fully.
These teeth have suitable size and pitch.Terminology used here " pitch " is meant the distance between the adjacent tooth end.In illustrated compression, the degree of depth of tooth (or height) preferably is approximately 0.1～0.17 inch (about 2.5～4.3mm).Pitch is preferably about 1～5mm, and better is about 1.5～2.5mm.The pitch of these teeth has determined the width of sheet that hygroscopic material is cut into or isolates.
On the surface parallel of bottom roller 36, can also comprise several thin planar shaped grooves 44 that separate equably each other with its axis X.The width of the groove 44 that evenly separates each other on bottom roller 36 in this embodiment, is preferably 2mm." length " of tooth that measure round the bottom roller circumference between two grooves that separate, on the bottom roller 36 is 8mm.Best, roller 34 and 36 is driven rotation in opposite direction.
Leg-of-mutton tooth on the top roller 34 and the 40 best spaced-apart segment distances of the negative area on the bottom roller 36 make them partly engaged.The degree of the tooth interlock on two relative rollers is called " the engagement degree " of tooth here.The engagement degree of tooth is meant that two tooth tops on respective rollers position (0% engagement degree) at grade to the tooth top of a roller extends internally and crosses described plane towards the distance between the position shown in the plane that the negative area of relative roller stretches into.The engagement degree of tooth can be by the percent of pitch (distance between the tooth top on the roller), or measured above-mentioned distance illustrates.Because the height of tooth can be greater than pitch, therefore degree of engagement can be greater than 100% (that is: the engagement degree be greater than pitch length).Best, the engagement degree is to be approximately 15%～120% of pitch length.With the engagement degree shown in the measured above-mentioned distance, (about 0.25mm～1.8mm) is preferably about 0.04～0.06 inch (about 1mm～1.5mm) to be approximately 0.01～0.07 inch.
As shown in Figure 2, on the part shown in the A, composite web 20 is sent to the gap between two rollers 34 and 36 along machine direction (MD).In this stage of process, the second net width of cloth of material 24 plays the carrier web width of cloth.As the carrier web width of cloth, the second net width of cloth support of material 24 and holding the net width of cloth of the incompatible material 22 that will be cut open and make granular material.The second net width of cloth of material 24 is wrapped in the net width of cloth outside of incompatible material 22, and the second net breadth that makes material 24 is facing to the embossed surface on the roller 34 and 36.
Roller 34 and 36 embossed surface are pressed in the composite web 20, make composite web 20 produce mechanically deforms.The power that the mechanically deform process produces, greater than the breaking yield point of the net width of cloth of inconsistent foam absorbent material 22, but the breaking yield point of the carrier web width of cloth of making less than adhesive-bonded fabric (the second net width of cloth of the material 24 that joint capacity is higher); Therefore, the net width of cloth of inconsistent foam absorbent material 22 is cut open at least in part, and carrier web 24 can not be cut open.
Fig. 2 is illustrated in by after the gap between first pair of rollers 32, the state of the composite web when stage B.As shown in Figure 2, form on the carrier web 24 with adjacent roller 34 and 36 on decorative pattern make up corresponding corrugated decorative pattern.Yet carrier web 24 is not cut open or cuts off.On the mid-level net width of cloth of foam absorbent material 22, form many slits 50.Slit 50 is arranged along machine direction (MD).Shown in specific embodiment in, slit 50 is that the band laterally (" CD ") of machine direction of alternate, as not had slit material 52 separates.This is owing to existing groove 44 to cause on above-mentioned bottom roller 36.Because the breaking yield point of the net width of cloth of foam absorbent material 22 is lower than the breaking yield point of carrier web 24, therefore, the net width of cloth of foam absorbent material 22 is cut open, and carrier web 24 is not cut open; Simultaneously, in pulling force (deformation process) effect down, the foam absorbent web material width of cloth ruptures, and carrier web 24 does not rupture.
In this stage of process (stage B between first pair of rollers 32 and second pair of rollers 62), also can on composite web 20, carry out the other step.For example, can between first pair of rollers 32 and second pair of rollers 62, composite web 20 be cut into several independent sections.In other embodiment, can utilize the cutting blade on the roller that is placed in first pair of rollers 32, composite web 20 is cut into several independent sections.The length of the hygroscopic material pipe that the Duan Yingyu that composite web 20 is cut into sanitary towel shown in Figure 13 is required adapts.
In addition, between first pair of rollers 32 and second pair of rollers 62, can be with the net width of cloth (or a plurality of net width of cloth) of another kind of material, the continuous net width of cloth of for example foraminous film topsheet material 56 is connected with composite web 20.Another kind of scheme is this other material to be cut into independent sheet, and to be connected with composite web 20 between first and second pair of rollers.Foraminous film topsheet material 56 was illustrated among Fig. 3 with being connected of composite web 20.In Fig. 2, simple in order to illustrate, saved connection.Best, foraminous film topsheet material 56 is connected with composite web 20 usefulness bonding agents.The structure of Xing Chenging is called " pipe formed composite body " (or " pipe formed composite net width of cloth ") 88 here like this.
Second pair of rollers 62 that makes composite web produce the said apparatus 30 of mechanically deform comprises top roller 64 and bottom roller 66.Decorative pattern is all arranged on the surface of each this roller.As shown in Figure 2, top roller 64 has the bump parallel with its axis X.These bumps form many leg-of-mutton teeth 68.Circumference around top roller 64 can have several isolated grooves 70.
Fig. 2 illustrates when composite web 20 is left gap between second pair of rollers 62, and the part of foam absorbent material 22 has many along the horizontal slit 80 of machine direction at least.This beginning is cut on machine direction, and hygroscopic material 22 can be made or cuts into many granules 82 in the lateral dissection of machine direction.Owing on second pair of rollers 62 groove 70 is arranged, therefore, what can have optionally on the foam absorbent material 22 that some do not have a slit is with 84; In addition, owing on the bottom roller 36 of first pair of rollers 32, groove 44 is arranged, therefore, in the part whether slit is laterally also arranged of machine direction.
In addition, the carrier web that adhesive-bonded fabric is made 24 a not incision, but make another kind of decorative pattern on it.Formed whole decorative pattern is similar to the grid that has the impression combination that is produced by first and second pair of rollers 32 and 62.The decorative pattern that forms on the apertured film top flat 56 is similar to the decorative pattern on second pair of rollers 62.
Fig. 3 illustrates by the later composite web 20 of device shown in Figure 2.As mentioned above, be preferably between first and second pair of rollers apertured film top sheet materials 56 is connected with the independently section of composite web 20.The width that Fig. 3 illustrates apertured film top sheet materials 56 preferably with composite web 20 be cut into the independent segment width identical, and length is more a little than independent segment length.Apertured film material 56 has extended beyond the two ends of the independent segment of composite web material, therefore, only needs the two ends of material 56 are connected with sanitary towel, can more easily the hygroscopic material pipe that forms be connected with sanitary towel.
Should understand, in Fig. 3, for simplicity, omit by first and second pair of rollers and be pressed into the decorative pattern that forms in the non-woven material 24.In addition, for simplicity, inconsistent foam absorbent material 22 is expressed as including only granule 82 (that is, the band that does not have slit on incompatible material 22 does not illustrate).This embodiment as long as make each roller in above-mentioned first pair of rollers 32 and second pair of rollers 62 have successive tooth, and saves the groove 70 between negative area 40 and the tooth, promptly can form.
(2) optional step of the folded tube formed composite net width of cloth
Making the next procedure of the hygroscopic material pipe of sanitary towel shown in Figure 13, is folding composite web 20, the compages of foraminous film topsheet material piece 56 and pipe formed composite net 88.These are chosen wantonly.But comparatively ideal folding step is illustrated in following several accompanying drawing.
Fig. 3 illustrates longitudinal folding line F, and vertical side surplus of aforementioned tube formed composite net 88 begins to fold round it.Fig. 4 is illustrated in first folding step, after 90s along the folding above-mentioned side surplus of fold line F, and pipe formed composite net 88 formed " C " font foldable structure.
Fig. 5 is illustrated in second folding step, the pipe formed composite net after folding 88.As shown in Figure 5, pipe formed composite net 88, folding along its longitudinal centre line L.As a result, previous folding vertical side surplus 90 was adjacent to each other, and vertical side surplus 90 of pipe formed composite net 88 is towards the inboard volume pleat of composite web 88.As shown in Figure 5, folding vertical side surplus 90 is near the longitudinal centre line L of pipe formed composite nets 88.Now, utilize method of the present invention, be easy to make folding pipe formed composite net shown in Figure 5 88 joint.(Fig. 2～step shown in Figure 5 all be choose wantonly but for the hygroscopic material pipe of making sanitary towel shown in Figure 13, be some ideal steps).
C. the joint of incompatible material (and be shaped)
(1) preamble
In order to engage (and shaping) inconsistent hygroscopic foam material 22, usually, have the net width of cloth of the material 24 (adhesive-bonded fabric) of the second higher joint capacity, be placed on the outside of incompatible material 22 (foamed materials of moisture absorption).The cross section of the practical structures that engages (as shown in Figure 7) is complicated, but in order to illustrate, above-mentioned universal relation (the net width of cloth with material of the second higher joint capacity is placed on the outside of the net width of cloth of incompatible material) had better be shown out.
The inconsistent hygroscopic foam material 22 and the net width of cloth outside it, that have the non-woven material 24 of the second higher joint capacity, the most handy many spontaneous joints 94 engage.Term used herein " spontaneous " is meant without bonding agent or other other materials (that is, being added in the material on the element that will engage in addition), sewing thread for example, the joint that carries out.Yet method described here is not to only limit to without the enhanced this spontaneous joint of bonding agent, or bonding agent joint itself.
Best, above-mentioned joint 94 penetrates inconsistent hygroscopic foam material 22.Best, joint 94 couples together the part of the net width of cloth of adhesive-bonded fabric 24 with another part of the net width of cloth of the adhesive-bonded fabric 24 of an opposite side of inconsistent foamed materials 22.In illustrated embodiment, engage a step as the method for the present invention of joining non-compatible material, also can have the hygroscopic material pipe of unique 3D shape in order to formation.
When using method of the present invention, can use the joint 94 of any proper number.Joint 94 can be positioned on any suitable position.In order to make the hygroscopic material pipe of sanitary towel shown in Figure 13, preferably use 2～5 joints 94.In illustrated embodiment, three joints 94 have been used.Preferably spaced-apart about 1.75 inches of joints 94 (approximately 4.4cm), and distance is along the about 17mm of fold line of the L shaped one-tenth of longitudinal centre line of aforementioned tube formed composite net 88.
Above-mentioned spontaneous engaging process can use heat and/or pressure, or ultrasound wave carries out.To more specifically Ming Re and/or engage pressure, the particularly appropriate method that dynamically engages below.Corresponding ultrasonic connection method is authorized No. 4430148, the United States Patent (USP) of Schaefer, that be entitled as " ultrasonic connection method ", Procter Gamble company on February 7th, 1984; Authorize with on April 25th, 1989 No. 4823783, United States Patent (USP) people such as willhite Jr., that be entitled as " the net width of cloth without bonding agent with serial movement engages the product that forms the stacked net width of cloth and downcut from the net width of cloth " and be described.Suitable ultrasound wave junction apparatus can be from Branson Ultrasonics of Danbury, and CT company buys.Ultrasonic bonding equipment preferably is equipped with its decorative pattern element flat board identical with the decorative pattern element of following dynamic joint method.Yet, should understand, when being used to engage the bigger structure of some thickness described here, ultrasound wave engage may not be most preferred (with dynamic joint method relatively).
Dynamically joint method is compared with ultrasonic connection method and is had several advantages.The first, dynamically joint method is the continuation method that can carry out at a high speed.On the contrary, general ultrasound wave engages needs to use the device with at least one static head, in order to form joint, needs a fixed dead time.Therefore, when using ultrasonic connection method, the net width of cloth that engage must stop a period of time to finish joint.The second, ultrasonic connection method be unsuitable for bond thickness surpass a certain amount of (for example, reach, or greater than, or equal about 4mm) material.On the other hand, dynamic joint method described here can easily engage and have such thickness of material.
In engaging process, it is favourable in previous step hygroscopic material 22 being cut or makes granular material.This is because be used to form the method for slit or granular material, can form a successive path clearly for joint contact hygroscopic material.If joint and slit or gap between particles on time, more can be accomplished this point.When slit or granular material were bonded on the above-mentioned carrier web width of cloth, this situation appearred in most probable.The method of existing cutting hygroscopic material is just cut hygroscopic material, and with compressed air hygroscopic material is blown in the pipe of sealing, causes the granule that cuts out arbitrarily to distribute.This method can not form the above-mentioned path of joint clearly.
Above-mentioned dynamic joint method comprises that the part that will be positioned at the second net width of cloth of hygroscopic foam material 22 material at opposite sides 24 (non woven coverstock) is bonded together.Foraminous film topsheet material 56 also can have the part that can dynamically be bonded together.As additional, or another kind of scheme is that the bonding part of foraminous film topsheet material 56 with adhesive-bonded fabric 24 is bonded together.When using dynamic joint method, it is thermoplastic that a kind of material (non woven coverstock 24 or foraminous film topsheet material 56) is preferably arranged in the material that will engage at least.(should be appreciated that for simplicity being bonded together with the bonding part of adhesive-bonded fabric 24 below being bonded on illustrates; Certainly, the apertured film top sheet materials can engage too in this way, but does not illustrate).
Fig. 8 illustrates the 24A of first of cladding material 24 preferably by aforementioned tube formed composite net 88 process that engage with the second portion 24B of cladding material.The device that is used for conjugation tube formed composite net 88 preferably includes a pair of cylindrical roller 110 and 112.Best, have a roller at least, for example on the surface of embossing roller 110 ridge design is arranged.Fig. 8 shows embossing roller 110 simply, (but the roller that has ridge design shown in Figure 12 is slightly different with decorative pattern shown in Figure 8) then shown in Figure 12 in more detail.
As shown in figure 12, embossing roller 110 has a cylindrical surface 115 and from surface 115 outwardly directed many juts or decorative pattern element (or " decorative pattern member block ", " lobe " or " fritter ") 116.The ridge design that is formed by decorative pattern element 116 can be an Any shape.Ridge design can be rectilinear, curved, perhaps can be made up of straight line portion and curved portion.Ridge design can be successive or alternate.Ridge design can form decorative pattern and other styles of unlimited more number.For example, ridge design can constitute some geometries, arrow, word etc.Contact surface 118 on the decorative pattern element also can make various shape.The suitable shape of contact surface 118 includes, but are not limited to ellipse and circle.
In the embodiment of shown device, ridge design comprises the decorative pattern element 116 many spaced from each other with circular contact surface 118, and in method embodiment shown in Figure 8,116 one-tenth interrupted orthoscopic of decorative pattern element are arranged.
Though the present invention goes for the joint of Any shape and size, see on plane graph that preferably joint is circular, diameter of a circle is about 0.25～5mm or bigger.In a preferred embodiment, the diameter of joint circle is about 3mm, and the area of circle is approximately 8mm 2
Decorative pattern element 116 has preferably not the sidewall 119 with the cylindrical roller Surface Vertical.Generally, the angle on the sidewall of decorative pattern element 116 119 and the surface 115 of cylindrical roller is greater than 45 °, and less than 90 °; Preferably about 70 °～90 °.Because the influence and the hope of the thickness of the material that will engage avoid tearing above-mentioned nonwoven cladding material 24, preferably change the orientation of the sidewall 119 of decorative pattern element 116.
Therefore another roller 112 can be called anvil block roller 112 as anvil element.Between embossing roller 110 and anvil block roller 112, form the gap 114 of a pressurized skew.Best, the surface of anvil block roller 112 is slick.Yet in other embodiments, roller 110 and 112 can have ridge design and/or decorative pattern element.Best, embossing roller 110 and anvil block roller 112 are promoted by the predetermined decorative pattern element load that is approximately 20000 pounds of/square inch (approximately 140MPa)～200,000 pound/square inch (being about 1400MPa), are offset toward each other.In the embodiment shown in fig. 8, two rollers 110 and 112 are offset toward each other, make the pressure in the gap 114 remain about 93700 pounds/square inch (approximately 656MPa).In this embodiment, the material that engage passes through gap 114 with higher speed.Material is preferably about 383 feet per minutes (approximately 117m/min) by the linear velocity in gap.
Embossing roller 110 and anvil block roller 112 are preferably in same direction, rotate with different speed drive; Like this, there is a superficial velocity poor between them.The superficial velocity difference is preferably about 2%-40% of the speed of the lower roller of superficial velocity, and better is about 2%-20%.The superficial velocity of the anvil block roller 112 preferably superficial velocity than embossing roller 110 is big.Yet, when linear velocity is high, also may under speed difference is zero situation, engage (that is: the superficial velocity that forms the roller in above-mentioned gap equates).
The polylith thin slice that comprises aforementioned tube formed composite net 88 can be joined together by the gap of passing between roller 110 and 112 114.Illustrated preferred engaging process can pass pipe formed composite net 88, and from body ground the 24A of first of nonwoven cladding material 24 and the second portion 24B of cladding material 24 is joined together.Forming joint 94 relatively between the part two of the net width of cloth of non-woven material 24 foamed materials 22 outsides, that have the second higher joint capacity.
Without any need for special theory, it is believed that the mechanism of incompatible material joint is as follows.The inconsistent hygroscopic foam material 22 of decorative pattern element 116 compressions on the roller of engagement device.This partial compression makes 22 fractures of inconsistent hygroscopic foam material and separates (leaving the pressure application point) with the zone of decorative pattern element 116.Engagement device cuts incompatible material 22, or the granule of incompatible material 22 is removed, and therefore forms a path clearly, and the material that engage is bonded together.Best, stay (if any) foamed materials 22 very in a small amount at joint.
Except engage penetrable to the incompatible material, described method also has several other important characteristic.These characteristics can allow the big material of bond thickness, and can form the bonding pattern that is actually unlimited more number on the material that will engage.Submissive (or compressible) material 120 is preferably arranged on the surface 115 of above-mentioned embossing roller 110.Preferably also have two composite support spares 122 on the surface 115 of embossing roller 110.The effect of these parts will illustrate below.
The effect of submissive material 120 is materials that compression will engage, and decorative pattern element 116 can not pricked wear cladding material 24.If cladding material 24 pricks worn, then can not form joint, or the joint that forms is very fragile, do not engage because the non-woven material that covers can not melt to form.The step of compression can be before engaging, or carry out with engaging simultaneously.When the material that will engage was thicker, it was particularly suitable using submissive material on decorative pattern roller 110.When the material that will engage is thin, can save submissive material.Figure 12 illustrates, and submissive material 120 surrounds above-mentioned decorative pattern element 116.
Comparison diagram 9 and Figure 10 can find out submissive material 120 roles.Fig. 9 illustrates the situation of thicker material by the gap 114 between, embossing roller 110 and the anvil block roller 112, does not wherein have submissive material to surround decorative pattern element 116.As shown in Figure 9, owing to wanting on the grafting material, the particularly very big local stress effect on the material 24 of Fu Gaiing, the material that decorative pattern element 116 will engage is pricked and is worn.
Figure 10 illustrates thicker equally material and surrounds the embossing roller 110 of decorative pattern element 116 and the situation in the gap 114 between the anvil block roller 112 by submissive material 120.As shown in figure 10, submissive material 120 occupies the space between embossing roller 110 and the anvil block roller 112.Submissive material 120 makes material little by little compression on decorative pattern element 116 zones that will engage.This makes that two layers of cladding material 24 are more close in engaging process, but can not make cladding material 24 produce additional distortion.This just can tear cladding material 24, or makes the foamed materials 22 between 24 two layers of cladding material prick out a hole, and forms joint 94.
Just can find out the working condition of this method by imagining following analog case.The principle of this method is similar with the principle that ail gun is fixed on the another kind of material to glassfiber insulation spare that will 6 inches (15cm) is thick.If glass fibre does not compress, then when iron nail penetrates, iron nail is with insulation-piercing spare and pass through insulating part fully.Yet, if before using ail gun fixing glass fiber, make the compression of glassfiber insulation spare, can not produce above-mentioned situation, and nail also can be fixed insulating part.
Submissive material 120 preferably has certain characteristic.The compressibility of submissive material 120 is littler than the compressibility of the material that will engage, but bigger than the compressibility on the surface 115 of embossing roller 110.Therefore, the hardness of submissive material 120 should be littler than the hardness on the surface 115 of embossing roller 110.Generally, the hardness of submissive material (measuring with durometer) arrives between the HRC scale about 62 for Durometer A hardness scale about 50; Be preferably Durometer A hardness scale about 50～100; Be desirably most about Durometer A hardness scale 90.(HRC scale 62 is the D on the surface 115 of formation embossing roller 110 2The hardness of steel).(though the hardness of anvil block roller surfaces can be any suitable value, and preferably its hardness equates with the hardness on the surface 115 of embossing roller 110 or is bigger than the latter).
Submissive material 120 can be any type of material.Suitable material comprises pyrite, rubber and polymeric material, for example polyurethane.In a preferred embodiment, submissive material 120 is a polyurethane.
The width of submissive material 120 should be wideer than the material width that will engage.This can make pressure equate on the whole material that will engage.The thickness of submissive material 120 can be any suitable size.Best, it is enough big that the thickness of submissive material 120 is wanted, so that the problem of avoiding perforation on above-mentioned cladding material 24 can be played corresponding effect.The thickness of submissive material 120 preferably is not more than the height of above-mentioned decorative pattern element 116.For example, the height of decorative pattern element is approximately 2mm.In a non-limitative example, find that it is suitable that thickness that hardness is approximately the submissive material of polyurethane of Durometer A hardness scale 90 is approximately 1.5mm.
Submissive material 120 preferably is bonded on the surface 115 of embossing roller 110.Can be with any suitable method, for example welding or bonding agent, with submissive material adhesive on embossing roller 110.
The effect of above-mentioned load supporting member 122 be balance embossing roller 110 (that is, and when the material that will engage between embossing roller 100 and anvil block roller 112 by the time, make the power that acts on the embossing roller 110 even).When the decorative pattern on the embossing roller 110 was " unbalanced " or " unsettled ", applied load supporting member 122 was particularly advantageous.What so-called " unbalanced " or " unsettled " was meant decorative pattern element 116 on the above-mentioned embossing roller 110 is scattered in pressure in the gap 114 between embossing roller 110 and anvil block roller 112 around the circumferential variation of embossing roller 110, this is because the surface area difference of the contact surface 118 of decorative pattern element 116, and/or the distribution of decorative pattern element 116 causes.
When the bonding pattern balance, load supporting member 122 can save.Yet, as following will the detailed description in detail,,, still wish applied load supporting member 122 in order greater flexibility to be arranged aspect the highly bigger decorative pattern element 116 using even when bonding pattern is equilibrated decorative pattern.
The shape of load supporting member 122 can be to be fit to shape arbitrarily.Load supporting member 122 can be the successive form of annular rings around embossing roller 110.Load supporting member 122 also can be the form of interrupted part.If load supporting member 122 is interrupted part form, they are staggered, round the circumference of embossing roller 110 so that form successive annulus effectively around embossing roller 110 circumference.As shown in figure 12, load supporting member 122 preferably centers on the successive toroidal of embossing roller 110.
In illustrated embodiment, each lateral edges of the preferably close embossing roller 110 in position of two load supporting members 122.Two load supporting members 122 preferably are positioned at the lateral outer side (that is, loading supporting member preferably between the lateral edges of the core of embossing roller 110 and embossing roller 110) on the surface 115 of the embossing roller 110 that contacts with the material that will engage.This can guarantee that anvil block roller 112 directly contacts with load supporting member 122.When the material that will engage was sent in the gap 114 between above-mentioned two rollers 110 and 112, the anvil block roller contacted with the load supporting member.This contact be because the material that will engage is compressed in above-mentioned gap 114, and because two roller distortion cause under the bigger power effect of skew opposite to each other mutually making two rollers.
Relatively Figure 11 and Figure 12 can more carefully find out load supporting member 122 roles.Figure 11 illustrates the example that embossing roller 1110 does not have described load supporting member.The distribution of decorative pattern element 1116 on embossing roller 1110 is " intussusception " and equilibrated.Terminology used here " intussusception " is meant when when the circumference of embossing roller 1110 is watched decorative pattern, decorative pattern element 1116 be distributed with to a certain degree overlapping.This can guarantee, 1114 zones in the gap, and anvil block roller 1112 is continuously on the top of embossing element 1116 and can not fall into or sink between each decorative pattern element 1116.If above-mentioned decorative pattern element 1116 denestings, then anvil block roller 1112 can sink between decorative pattern element 1116 really, under very big pressure, be close together and with two rollers of high speed rotary as the automobile flat tire, the ripple shakiness of running very much works together.
In roller shown in Figure 11 1110, there are several groups of decorative pattern elements on other parts of several groups of decorative pattern elements and roller identical.In addition, between each group decorative pattern element, also have a plurality of supporting masses or a supporting mass band 1124.Owing to only show the part of roller surfaces among Figure 11, therefore, cannot see several groups of identical decorative pattern elements on other parts among Figure 11.Yet, the notion that illustrated one group of decorative pattern element and supporting mass 1124 are enough to say something.As shown in figure 11, when decorative pattern is equilibrated decorative pattern,, only need discontinuous supporting mass or the supporting mass band 1124 of being provided with then round the circumference of embossing roller 1110 (or interrupted).Supporting mass 1124 should be arranged on the position that does not have decorative pattern element 116.This is because when embossing roller 1110 rotated, the total power that is produced by load maintainer was transferred on the supporting member 1124 from the decorative pattern element.Need equilibrated decorative pattern to mean, on any point of roller, the bonding area in the gap (that is, being in the surface area of a part of two rollers of contact condition in the gap) is essential to keep invariable.If bonding area changes, then activating pressure also changes, and can make each joint inconsistent.
Figure 12 illustrate can be used for described method embodiment, decorative pattern element 116 has an example of the embossing roller 110 of denesting and unsettled decorative pattern.Though, only showing the part of the roller 110 that has one group of decorative pattern element 116 among Figure 12, roller preferably includes several decorative patterns round roller 110 circumference identical point spaced apart.(so-called " point " is meant that the decorative pattern element has circular contact area).Each group point distributes in desirable mode, forms joint on product.For example, in order to engage the pipe formed composite net width of cloth shown in Figure 8, each group point can be made up of three points that are arranged in a straight line.In order to engage absorbent device 1020 between lip shown in Figure 15, each group point can be made up of 4 or 5 points, lines up semicircle, as the situation at one group of decorative pattern element shown in Figure 16.
In order to discuss, supposing has 6 groups of points round the circumference of roller 110.All decorative pattern elements 116 in this example are highly identical.Wherein decorative pattern element 116 has the contact surface that diameter is the circular engagement surface of 2mm in three some decorative patterns.Decorative pattern element 116 has the contact surface that diameter is the circular engagement surface of 3mm in other three some decorative patterns.Having the decorative pattern element 116 of 3mm diameter contact surface and have the decorative pattern element 116 of 2mm diameter contact surface, is alternately to arrange round the circumference of embossing roller 110.
Before invention load supporting member 122 described here, the inventor does not know to have method easily, can utilize decorative pattern element that has 2mm diameter contact surface and the decorative pattern element that has 3mm diameter contact surface to form joint.For example, utilize common roller structure, can only form joint, but can not form joint with the decorative pattern element that has 3mm diameter contact surface with the decorative pattern element that has 2mm diameter contact surface.If select suitable pressure to come to form joint with the decorative pattern roller of band 2mm diameter contact surface, then pressure is just not enough when forming joint with the decorative pattern roller that has 3mm diameter contact surface.Vice versa (that is, can form joint with the decorative pattern element that has 3mm diameter contact surface, but can not form joint with the decorative pattern element that has 2mm diameter contact surface).If select suitable pressure to come to form joint with the decorative pattern element that has 3mm diameter contact surface, then pressure is just too high when forming joint with the decorative pattern element that has 2mm diameter contact surface, and can pass some through holes by thorn on the material that will engage.
Therefore, developed load supporting member 122 described here.As mentioned above, preferably these load supporting members 122 are continuous form of annular rings round embossing roller 110 circumference.In order to guarantee the dynamic equilibrium of embossing roller 110, get on except amassing the material that equates with the decorative pattern element surface from the load supporting member.As shown in figure 12, each side of load supporting member 122 all has the little zone that cuts 126.The same longitudinal axis setting of the optimum seeking site ground in these zones that cut 126 on the roller surfaces at decorative pattern element 116 places.For each style element 116 two cutout region 126 are arranged.Each cutout region 126 shown in Figure 12 is a semicircular in shape.The size of each cutout region is preferably half that is positioned at public surface size with the decorative pattern element 116 on the longitudinal axis.
The hardness of load supporting member 122 is more than or equal to the surface of embossing roller 110 and the hardness of decorative pattern element 116.Load supporting member 122 can be made by any suitable material.As the surface and the decorative pattern element 116 of embossing roller 110, load supporting member 122 is preferably by D 2Steel is made.
The load supporting member 122 thickness can less than, more than or equal to the height of decorative pattern element 116.In order to make engaging process simple, the thickness of load supporting member 122 is preferably identical with the height of decorative pattern element 116.For example, the height of decorative pattern element 116 is approximately 2mm.In a non-limitative example, approximately the thick load supporting member 122 of 2mm also is suitable.The width of load supporting member 122 can be any suitable value.Best, the width of load supporting member 122 makes the surface area of the each several part in the vertical district (promptly parallel with roller axis direction) along the surface of embossing roller 110 be equal to or greater than the total surface area of the contact surface 118 of the decorative pattern element 116 that is positioned at the same area.In the embodiment shown in fig. 12, the width of load supporting member 122 is approximately 6mm (part of the load supporting member 122 by not comprising cutout region 126 is measured).
Load supporting member 122 can make an integral body with embossing roller 110; Or make independent part, be bonded in then on the surface 115 of embossing roller 110.Best, load supporting member 122 makes an integral body with the surface 115 of embossing roller 110.If the load supporting member 122 be bonded on the embossing roller 110, then can carry out with any proper method bonding, for example welding.
Without any need for special theory, just know that load supporting member 122 can be used for using unbalanced decorative pattern to engage, change or change because of the variation of the surface area that the pressure of bonding land not only allows along with decorative pattern along with having or not the decorative pattern element.When adopting load supporting member 122, the pressure in the bonding land is subjected to the control of following factor: the material behavior of roller, the particularly material behavior of embossing roller 110; The material behavior that engages; And the geometry of decorative pattern element 116 and load supporting member 122 (that is, height and surface area).Owing to engage is to carry out under higher pressure, and therefore, roller can be out of shape, and particularly the decorative pattern element 116.The pressure of bonding land can make decorative pattern element 116 be compressed and be offset.The pressure of bonding land also can make the surface generation skew to a certain degree of the embossing roller 110 around the decorative pattern element root.With the position of the contact point of decorative pattern element 116 on, anvil block roller 112 also may produce local deformation.
The thickness of the joint that the deflection of decorative pattern element 116 and peripheral region thereof is equivalent to form in this way.In the described here preferred embodiment, the thickness of joint (is approximately in 0.038～0.05mm) scope about 0.0015～0.002 inch greatly.Even having the zone of decorative pattern element 116 and the material that will engage to send under the situation in the gap 114 between embossing roller 110 and the anvil block roller 112, this distortion also can make anvil block roller 112 and constant contact of load supporting member 122 maintenances.For this reason, loading force is essential enough big, contacts with the anvil block roller is changeless to guarantee load supporting member 122.Like this, load supporting member 122 plays the effect of " block " of anvil block roller 122, to prevent decorative pattern element 116 further compression deviations.
The intensity of load supporting member 122 should design enough greatly, in case so that anvil block roller 112 contacts with load supporting member 122, the activating pressure that acts on the decorative pattern element 116 can further not increase.If load supporting member 122 is stone, then when loading force increased, the load that just acts on the load supporting member 122 increased.
The balance of embossing roller 110 has the meaning of particular importance.Can utilize the characteristics of this aspect of joint method, the decorative pattern element of the contact surface by having different size round the embossing roller circumference forms bonding pattern.The characteristics of this of joint method aspect also are not subjected to previous mechanical constraint.Bonding pattern be not must intussusception and bonding pattern also need not to be isostatic decorative pattern.For example, utilize previous joint method, producing the isostatic intricate detail of the such cover superimposition of decorative pattern for example shown in Figure 17 needs very complicated design process.The balance of embossing roller guarantees bonding pattern intussusception and balance with regard to not needing to carry out complicated design work.
In addition, can produce some and be fit to some special joint needs or consumer taste, rather than the bonding pattern of method restriction.In addition, method described here can be used to produce the bonding pattern for the unrestricted number of aesthetic purpose or other purpose needs.For example, utilize method described here, can on the material that will engage, write personal letter or impress out a width of cloth picture.
In addition, applied load supporting member 122 makes and can use much higher decorative pattern element 116 in the method.Generally, the height of existing decorative pattern element is approximately 0.015 inch (approximately 0.38mm).As described here, the height of decorative pattern element 116 can reach 2mm or bigger.Like this, can engage thicker material.Yet the embossing roller that has highly bigger decorative pattern element is not limited in and is used for engaging thicker material.It also can be used for engaging thin material, because load supporting member 122 can make decorative pattern element 116 not pierce through the material that will engage.
The characteristics of this aspect of this method also can make the life-span of embossing roller 116 increase.Generally, the roll wear of ridge design being arranged is because the stress on the decorative pattern element causes.The applied load supporting member can bear a part of this stress and alleviate the pressure that acts on the decorative pattern element, therefore can reduce stress.And for example the above, the load supporting member also can play one " block " effect, to prevent the further compression deviation of decorative pattern element.Because the load supporting member can play " block " effect, prevents the further compression deviation of decorative pattern element, therefore, the decorative pattern element can not be out of shape above its plastic deformation point.
(2) the non-limiting variation of joint method
Described joint method can have many variations.Some this nonrestrictive variations are described below.
For example, method described here is not limited only to be used in the used material of joint absorbent device.For example, method described here can be used for engaging and be used to make the used material of package packing supplies, or the used material of the articles for use of any other form, particularly the material in the articles for use of those use incompatible materials, polymeric material etc.In addition, the central sheet of the material that engage not necessarily will comprise incompatible material.It can contain any type of suitable material, includes but not limited to thermoplastic.
In addition, the roller structure of joint method described here also is not limited only to illustrated structure.For example, in other embodiments, two rollers can have the decorative pattern element.All have among the embodiment of decorative pattern element at two rollers, the decorative pattern element can contact with each other.Another kind of scheme is, the decorative pattern element on roller can be on the position between the decorative pattern element of another roller surfaces, with the surface contact of relative roller.In addition, the load supporting member also is not limited only to only be located on the embossing roller.The load supporting member can be arranged on the anvil block roller, or on embossing roller and two rollers of anvil block roller.
Load supporting member shown in Figure 12 also can be done many variations.For example, the load supporting member can have at least some discontinuous parts, and embossing roller 110 still has described some or all advantage.In addition, the shape of the cutout region of load on the supporting member does not need identical with half of decorative pattern component shape.
The method for optimizing that dynamically engages these materials also can comprise the step of one or two roller 110 of heating and 112.If heated rollers then preferably is heated to roller the degree of its surface temperature than the low predetermined value of fusion temperature of the thermoplastic material in the above-mentioned cladding material 24.
In other embodiments, the material that will engage send into engage in the above-mentioned gap 114 before, can make material compression (or " precommpression ").For example, can make the material that will engage, material is carried out precommpression by the press nip between another pair of rollers before roller 110 and 112.Precommpression can comprise the whole material that will engage of compression, or some zones in the partial compression aforementioned tube formed composite net 88, that will form joint 94.
In other joint methods, the precommpression step also can be carried out with engaging.For example, if use ultrasound wave, then ultrasonic fusing device or " staking out " can engage in the dead time of need of living in forming ultrasound wave usually, make the material that will engage that to a certain degree compression be arranged.Therefore, under the situation of traditional ultrasonic fusing, can not need the precommpression step of separating with the general engaging process that uses.
In addition, for make explanation simple and clear for the purpose of, yet in the joint method of the present invention employed device as comprising that two columniform rollers 110 and 112 illustrate that cylinder is the part in an exemplary formation gap.Therefore, the present invention is only limited to the device that comprises cylindrical roller.Equally, using term " decorative pattern element " is not described method to be confined to engage the decorative pattern of only being made up of pattern element independent, that separate each other, the decorative pattern that does not also repel other, for example netted decorative pattern or comprise the decorative pattern of successive or elongated closing line.
Method described here also can be included in any method restriction or the step described in No. 4854984, the United States Patent (USP) authorizing people such as Ball on August 8th, 1989.
When using dynamic joint method to engage, another factor that should consider is the uniform distribution of load on the decorative pattern element.When using one to engage roller or surface and engage the material with different-thickness part, this point is very important.Different thickness may appear on material under several different situations.For example, the material that can engage makes section bar or carries out press polish, makes its some zones have different-thickness.Perhaps, the material that engage can be the length and/or a width laminate all inequality of all layers.In this case, the layer that some joint passes when engaging is more than the layer that the other joint passes.
In this case, make load equally distributed a kind of method on the style element be, change the angle of the sidewall 119 of decorative pattern element 116.Penetration thickness is bigger wants the angle of sidewall 119 of the decorative pattern element 116 of grafting material part, should be than the angle of the sidewall 119 of the decorative pattern element 116 that passes the less material that will the engage part of thickness more greatly.For example, penetrate and want the angle of the sidewall 119 of the decorative pattern element 116 of thin part of grafting material to be approximately 50 °; And the angle than the sidewall 119 of the decorative pattern element 116 of thickness portion that penetrates the material that will engage is approximately 70 °.If desired, penetrate want grafting material also can be big than the height of the decorative pattern element 116 of thickness portion (or will other decorative pattern element do to such an extent that lack).
As mentioned above, method of the present invention can use bonding agent, coadhesive, hydrogen bond to engage (for example, if a kind of material that engages comprises cellulose), heat and/or pressure, or hyperacoustic means realize.Yet, preferably use dynamic joint method or ultrasound wave.If the material (for example second net width of cloth of material 24) that engages is used when with traditional joint method (particularly bonding agent) chemical reagent that conflicts or compositions-treated being arranged this method advantageous particularly.If when second material maybe can change the hydrophilic material processed of second material with skin care compositions, then this joint method was favourable.
The surface-treated example of a kind of form in back was authorized at December in 1997 in No. 5693037, the United States Patent (USP) of P﹠ G company people such as Yan-Per Lee, that be entitled as " absorbent device with improved hydrophilic topsheet of handling with surfactant " and is described on the 2nd.Described dynamic joint method and ultrasound wave engage can be engaging the material through this processing, or will be enough heat passage by this coating or treated surface so that engage with subsurface material formation.Another kind of scheme is if just carry out this surface treatment unceasingly, then can make the joint penetrable material not have the part of handling the one-tenth of the Pattern Design on the engagement device.
Fig. 7 illustrates, and joint can compress the compressible foam absorbent material 22 on the regional area that forms joint 94 or more preferably make its displacement.Like this, the remainder of the three-dimensional part 100 that can make pipe formed composite net 88 and pipe formed composite net 88 is kept apart, and isolated part 100 (and whole pipe formed composite net 88) is made different shapes.The both sides of pipe formed composite net 88 are shaped, preferably are shaped symmetrically.Pressure is acted in the pipe formed composite net 88 by decorative pattern element 116 be pressed on the part on the curvilinear surface of anvil block roller because engage, therefore, the symmetry of above-mentioned net 88 2 side can reach.Therefore, this embodiment of method of the present invention is with can to form the embossing method that has an embossing side and a flat lateral structure different.
D. the hygroscopic material pipe is fixed on the base mat and forms composite sanitary napkin
After engaging process, a pipe formed composite net that preferably will engage 88 is cut into a plurality of independent hygroscopic material pipes, each root hygroscopic material pipe is placed on forms a composite sanitary napkin on the base mat.
As shown in Figure 8, the device that is used to cut off the pipe formed composite net 88 of joint comprises a pair of roller 130 and 132.Has at least one preferably a plurality of scraper spare 134 on the surface of one of them roller-roller 130.Best, the shape of scraper spare 134 can form successive, substantial transverse cut channel on the pipe formed composite net that engages continuously 88.Another roller 132 plays anvil element, therefore can be described as anvil block roller 132.Also form a gap 136 between scraper roller 130 and the anvil block roller 132.After cutting off step, one hygroscopic material pipe 88 is delivered on the conveyer belt 140, so that fix, form composite sanitary napkin with above-mentioned base mat.
Under the situation of one hygroscopic material pipe shown in Figure 7, the remainder 102 that utilize to engage the pipe formed composite net that is fixed together 88 launches, and it is scatter before being fixed on the base mat will managing formed composite net 88.The joint of the remainder 102 of pipe formed composite net 88 and expansion make pipe formed composite net 88 make the shaped profile shape, and the partial width of composite web attached 88 that wherein constitutes the hygroscopic material pipe top on the finished product is narrower.Preferably as shown in figure 13, constitute the part of the composite web 88 at the hygroscopic material pipe top on the finished product, form vertical outstanding bump 106 from the top of composite web remainder 102 (with the remainder of sanitary towel).And for example shown in Figure 13, engage and also can make pipe formed composite net 88 have top gem of a girdle-pendant applique stricture of vagina, pursing up around joint 94 at this top gem of a girdle-pendant applique stricture of vagina place pipe formed composite net 88.
Figure 13 is illustrated in a kind of combined type sanitary towel that has the hygroscopic material pipe 88 that engages with method of the present invention towards a side of health.
In order to form combined type sanitary towel 800; can utilize a sanitary towel as briefs-protecting device (or " base mat ") 820; and will be placed on the top of base mat 820, and make at least and be connected with base mat at the two ends of hygroscopic material pipe as the hygroscopic material pipe 88 of " main menopad ".The sanitary towel that is suitable as base mat 820 comprises The Procter ﹠ Gamble Company of Cincinnati, the ALWAYS ULTRA sanitary towel that Ohil sells.
In a concrete preferred embodiment, base mat 820 comprises a kind of modification such as ALWAYS UTRA sanitary towel, have absorbent article core, cover thin paper and DRI-WEAVE apertured film above the absorbent article core, absorbent article core comprises the tissue layers lamination of the material granule of the formation hydrogel that has superabsorbent therebetween.The thin paper that is suitable for is the thin paper that Merfin ftygienic Products company makes.Cover on the absorbent article core thin paper the helix of handy bonding agent be connected with absorbent article core.
Hygroscopic material pipe 88 can be connected with base mat 820 with any suitable method.By at hygroscopic material pipe two ends with prolongation 58 fusion bond of top sheet materials 56 on base mat 820, hygroscopic material pipe 88 is connected on the composite sanitary napkin 820.In some preferred embodiment of this combined type sanitary towel, also can between the end of hygroscopic material pipe 88 and base mat 820, the hygroscopic material pipe be connected with base mat.Bonding agent is for example used in available any suitable method of attachment, is connected with base mat between the hygroscopic material Guan Zaiqi two ends with combined type sanitary towel.
Sanitary towel 800 has first end (or front end) district's 828, the second ends (or rear end) district 830 and the center between first and second end region 832.As shown in figure 13, because the result who engages, hygroscopic material pipe 88 makes the shaped profile shape from the front end region 828 of sanitary towel 800 to petiolarea 830 thereafter.More particularly, hygroscopic material pipe 88 transversely centrage T in the center of combined type sanitary towel thickness maximum; And diminish gradually towards the two-end thickness of combined type sanitary towel.
Can change bonding pattern, the hygroscopic material pipe is increased along the total length of combined type sanitary towel 800 or the thickness of partial-length.For example, can engage like this, promptly make the thick center 832 that is limited to of increase of combined type sanitary towel 800.Perhaps, also can utilize bonding pattern, the thickness of the end region of sanitary towel is increased, or the thickness of the part of the part of center and end region is increased.
2. the alternative of method of the present invention
The present invention has many alternative embodiments.For example, in an alternative embodiment, the hygroscopic material in the hygroscopic material pipe needn't make granular material before joint, can use the hygroscopic material of monoblock that is:.Yet the joint that connects monoblock hygroscopic material (for example foam absorbent material) is relatively more difficult, if particularly material thickness is more difficult above about 4mm.
In addition, utilize method of the present invention, also can engage other forms of material, for example low-density hygroscopic material.For example, utilize method of the present invention can engage the air felt (airfelt) of not press polish.If desired, can press polish at the air felt, but after the material encapsulate air felt that Ying Zaiyong will engage and the method according to this invention engage, just can press polish air felt.
Yet method of the present invention relatively has several advantages with the method for just absorbent device (absorbent device that for example comprises embossing air felt absorbent article core) being carried out embossing.In this absorbent device, top flat can be bonding with the absorbent article core of air felt.Egative film also can be bonding with the air felt.Cellulose fibre in the air felt can be connected and fixed by hydrogen bond.The shortcoming of these hydrogen bonds is that they can be unclamped by liquid.Bonding agent also has the shortcoming of being unclamped by liquid, and also can unclamp bonding agent if the ingredient (for example top flat) of absorbent device is carried out certain surface treatment.
Figure 14 illustrates the another kind of method of the present invention and uses.Among the embodiment formerly, method of the present invention comprises that the material that can engage is placed on the outer surface of incompatible material, by penetrating incompatible material these materials is bonded together then.In Figure 14, method of the present invention be used for two blocks of inconsistent materials be placed on material incompatible material the inside, that can engage and be joined together.
Figure 14 illustrates two net width of cloth of incompatible material 22.The net width of cloth of incompatible material 22 can be any incompatible material described here.Best, the net width of cloth of incompatible material comprises a kind of hygroscopic foam material.Although use bonding agent to be difficult to this hygroscopic foam material and other materials are fixed, in this embodiment, the net width of cloth of the material 24 that use one deck bonding agent 98 is higher with each the net width of cloth of hygroscopic foam material 22 and joint capacity engages.Yet this being bonded with makes hygroscopic foam material isolating danger in the abutting edge, because the poor structural integrity of hygroscopic foam material.The net width of cloth of the material 24 that joint capacity is higher can be any second material described here.Best, the net width of cloth of the material 24 that joint capacity is higher comprises the non-woven material net width of cloth.
As shown in figure 14, the net width of cloth of the hygroscopic foam material 22 that bonds together with nonwoven web 24 and nonwoven web 24 are contiguous mutually Face to face places.Then, utilize method described here, the whole composite construction that forms like this is bonded together.Composite construction is engaged by the gap between a pair of roller in all devices as shown in Figure 8.This can make joint 94 form between two non-woven material nets 24.
Joint 94 can be an outside from hygroscopic foam material 22 invisible " a hiding " joint in this embodiment.Joint 94 can be that what to hide is generally only to make in a small amount foamed materials displacement because form the decorative pattern element of joint.In addition, after engaging, foamed materials 22 can be launched on the bonding land again, the place that the scumming material is shifted is not too seen and is drawn.
In addition, method described here also can be used for other purposes and makes other forms of absorbent device.For example, Figure 15 illustrates absorbent device 1020 between a kind of lip that utilizes method of the present invention to engage and make.Absorbent device 1020 can be made by the suitable hygroscopic material that comprises any incompatible material described here between lip.In the embodiment shown in fig. 15, absorbent device 1020 is made of one deck nonwoven web cladding material 1046 parcel artificial silk cores 1044 between lip.When using common joint method, artificial silk generally is inconsistent material.Yet, as shown in figure 16, form joint 94 by between the nonwoven cladding material 1046 of the relative both sides of absorbent device between lip, penetrating artificial silk, just can utilize method of the present invention that above-mentioned artificial silk core 1044 is engaged and shaping.
As shown in figure 16, best penetration moisture absorption rayon material 1044 makes the 1046A of first of cladding material 1046 engage with the second portion of cladding material 1046.The device that is used to engage the hygroscopic material 1044 that is capped preferably includes a pair of cylindrical roller-embossing roller 110 and anvil block roller 112. Cylindrical roller 110 and 112 and roller shown in Figure 8 similar.Embodiment as shown in Figure 8 is the same, and preferably at least one roller promptly has ridge design on the surface of roller 110.Embossing roller 110 has a cylindrical surface 115 and many from surface 115 outwardly directed ledges or decorative pattern element 116.Contact surface 118 on ridge design and the decorative pattern element 116 can be any suitable shape.The angle that the sidewall 119 of decorative pattern element 116 forms is preferably to similar at roller shown in Figure 8 110 described angles.
Same or similar (the comprising of working method of roller 110 and 112 working method and device shown in Figure 8, but be not limited to: the superficial velocity difference scope between the roller, the scope of the clearance pressure between the roller heats the probability of one or two roller and forms part replacement roller with other forms of gap).
In device embodiment shown in Figure 16, ridge design also can comprise many decorative pattern elements that have circular contact surface 118 that are spaced apart from each other (or " decorative pattern member block ") 116.Yet in method embodiment shown in Figure 16, decorative pattern element 116 is arranged in " first quarter moon " shape.Decorative pattern element 116 is alternately arranged, and makes the adjacent joint that applies for twice be located at the relative both sides of longitudinal axis A 1 of the covering " rope " of hygroscopic material.
Joint method shown in the drawings penetrates the thin slice of hygroscopic material 1044, and the 1046A of first and its second portion 1046B of above-mentioned cladding material 1046 is bonded together from body.
Illustrated absorbent device embodiment has illustrated other advantages of method of the present invention.Joint 94 can be arranged to be actually the decorative pattern of unlimited more number.In fact these joints 94 can be used for forming, and geometry is unlimited many products.By line the stiffness of product is increased, and increase stability of structure and form absorbent device through joint.This line can be a straight line, curve, or be straight line partly, part is a curve.Can make very dark quilting impression in order to prevent leak of liquid or good looking appearance.The present invention also can be used for the production line (for example 700～1000 feet per minutes) that runs up and is not limited to some specific decorative pattern, as in sewing processing.
Figure 17 and Figure 18 illustrate and utilize sanitary towel 1320 method manufacturing of the present invention, that have several different characteristics.Figure 17 shows a kind of absorbent device (tensile sanitary towel 1320), in the process of making absorbent device, utilizes method of the present invention can finish several different steps simultaneously.Sanitary towel 1320 comprises a main part 1322.Main part 1322 comprises liquid permeable topsheet 1324; Egative film 1326 that be connected with top flat, liquid non-permeate; And be placed on absorbent article core 1328 between top flat 1324 and the egative film 1326.These ingredients can connect with any method of sanitary towel's 1320 elongations that assemble that makes.Sanitary towel 1320 can comprise two by top flat and egative film are melted in the end seal portion 1329 that forms together.Sanitary towel 1320 also has flap or the bluff piece 1330 that stretches out from each vertical side of the edge of its main part 1322.
Sanitary towel 1320 shown in Figure 17 has one and has the absorbent article core 1328 of being made the zone 1334 of granular material 1336 by described method.As shown in figure 17, the zone 1334 that comprises granular material is separated by the unshaped band of arranging at vertical and horizontal 1338.In addition, also can utilize method of the present invention, on top flat 1324 and egative film 1326, form deformable network area.Term " deformable network area " is authorized on May 21st, 1996 in No. 5518801, the United States Patent (USP)s people, that be entitled as " the net web materials with elastic property " such as Chappell and has been done detailed explanation.On top flat 1324 and egative film 1326, make deformable network area, can make these ingredients of sanitary towel have extensibility.The unshaped band of the deformable network area in top flat 1324 and the egative film 1326 can make these tensile ingredients have elastic property.Absorbent article core 1328 is made granular material can make absorbent article core 1328 be in not the afoul form of extensibility with top flat 1324 and egative film 1326.
According to the difference of the pattern of formed deformable network area, top flat 1324 and egative film 1326 can be in directions of X-Y plane, more than having extensibility on a direction or all directions.Among the embodiment shown in Figure 17, sanitary towel 1320 can extend at vertical and horizontal.The elongation of sanitary towel shown in Figure 17 is preferably the size described in No. 5611790, the United States Patent (USP) that propose, that be entitled as " tensile absorbent device " such as the people that authorized Osborn on March 18th, 1997.
Figure 17 illustrates method described here and also can be used for making flap or bluff piece 1330 to have extensibility.Above-mentioned flap 1330 can extend at above-mentioned top flat and described any one direction of egative film.Can also be by sanitary towel 1320 being passed through the decorative pattern of its decorative pattern surface portion that contacts with the above-mentioned wing 1330, with the different device of decorative pattern of the decorative pattern surface portion that contacts with the main part of absorbent device, make the prolonging direction of the wing 1330 different with the prolonging direction and the elongation of top flat and egative film with elongation.If what use is two engagement rollers, the various piece that then is used to make the above-mentioned wing to have on the roller of extensibility can draw closer together; Perhaps, if the number of plies that flap 1330 is had does not have the number of plies of main part 1322 many, then two rollers can get darker by degree of engagement.
Method of the present invention also can be used for being bonded together to each ingredient embossing of sanitary towel and/or with each ingredient of sanitary towel.Figure 17 illustrates, the embossing that can have many fusion bond place 1340 forms on the surface of health of sanitary towel 1320.The joint 1340 of fusing can be made by form many fasteners on the embossed surface of the device that is used for absorbent article core 1328 is made granular material.If desired, can optionally add thermal bonding.Generally, for each ingredient is bonded together, be that those ingredients that will be bonded together should comprise certain thermoplastic at least at least.In other embodiments, may wish that above-mentioned embossed surface only has the embossed surface towards health to sanitary towel, and between each ingredient, not form the fastener of the joint of above-mentioned fusing.
Therefore, can utilize method of the present invention that absorbent article core 1328 is made granular material, top flat 1324 and egative film 1326 can be extended, flap or bluff piece 1330 can be extended, embossing and/or they are bonded together and make the end seal of sanitary towel 1320 on each ingredient.All these steps can once by with the process of identical device shown in the diagram in finish.In addition, as shown in figure 18, bonding pattern can penetrate into egative film from top flat, and by top flat and egative film are separated into many districts, and provides structural intergrity for hygroscopic material.Hygroscopic material can comprise, for example, and the material of the added thermal bonding made from the air lay method.In such an embodiment, do not need to utilize common adhesive fiber or powder adhesives to keep the integrity of material.
Be introduced in above-mentioned all patents of mentioning in the whole explanation herein, patent application (with any relevant therewith patent, reaching any corresponding disclosed foreign patent application) and publication are for reference.But, do not represent that any reference paper of these introducings discloses or instructed the present invention.
Although disclosure and description specific embodiments of the invention, those of ordinary skills know, under condit without departing from the spirit and scope of the present invention, can carry out various changes and improvements.

Claims (26)

1. the joint method of a material in making the absorbent device process, described method comprises the following steps:
(a) provide first material with first joint capacity, first surface and second surface; Described method is characterised in that, also comprises:
(b) provide at least a joint capacity the other materials higher than first joint capacity;
(c) utilize the described at least a joint capacity material higher, cover at least a portion on first and second surfaces of described first material than first joint capacity; With
(d) utilize the joint that penetrates described first material, make described material at least a portion, that joint capacity is higher of the described first surface that covers described first material, be joined together with described material at least a portion, that joint capacity is higher of the described second surface that covers described first material.
2. the method for claim 1 is characterized in that, described first material has and common joint method incompatibility at least to a certain degree.
3. method as claimed in claim 1 or 2 is characterized in that, the step of described grafting material (d) comprises from the described material of body ground joint.
4. as any one described method in the above-mentioned claim, it is characterized in that, the articulate step of described material (d) is comprised that working pressure engages described material.
5. as any one described method in the above-mentioned claim, it is characterized in that described first material comprises the foamed materials of moisture absorption.
6. any one described method as in the above-mentioned claim is characterized in that described at least a other material is the non-woven material net width of cloth.
7. as any one described method in the above-mentioned claim, it is characterized in that described at least a other materials is the single net width of cloth that is wrapped in two side periphery of first material.
8. as claim 1,2,3,4 or 5 described methods is characterized in that, described at least a other materials comprises glue layer or polymer coating.
9. composite construction, it is characterized by, this composite construction comprises the hygroscopic material that has with common joint method incompatibility at least to a certain degree, described incompatible material has first joint capacity, be engaged first and second surfaces that the high a kind of material of described first joint capacity of energy force rate covers at least in part, described composite construction comprises one or more from the body joint, the part of cladding material of the described first surface of described incompatible material will be covered at least in part, be joined together with the part of the cladding material of the described second surface that covers described incompatible material at least in part, described composite construction has the outward appearance of quilting in described joint areas.
One kind in making the absorbent device process, engage the method that has with the hygroscopic material of common joint method incompatibility at least to a certain degree, described method comprises the following steps:
(a) provide a kind of hygroscopic material that has with common joint method incompatibility at least to a certain degree, described hygroscopic material has first joint capacity, first surface and second surface on the other side; Described method is characterised in that it also comprises:
(b) provide at least a its joint capacity the other materials higher than first joint capacity;
(c) utilize the joint capacity at least a material higher, cover at least a portion on first and second surfaces of described hygroscopic material than first joint capacity;
(d) on the described hygroscopic material that is capped, apply partial power, make described hygroscopic material apply the place displacement of described power, described power makes joint capacity than described first joint capacity relative two lip-deep described materials high, that be positioned at described hygroscopic material, contacts with each other in the place of described hygroscopic material displacement; With
(e) in the place of described hygroscopic material displacement, the described material that joint capacity is higher is bonded together.
11. method as claimed in claim 10, it is characterized in that, the breakaway poing of the material that the breakaway poing of described hygroscopic material is more higher than joint capacity is low, wherein, the breakaway poing of the described hygroscopic material of described local force rate is big, but the breakaway poing of the described material more higher than joint capacity is little, therefore, described hygroscopic material is at least a local fracture, and the higher material of joint capacity can not rupture.
12. method as claimed in claim 11 is characterized in that, applies local power and makes step (d) that displacement of described hygroscopic material and the described material that joint capacity is higher be bonded together and (e), can realize in once-through operation.
13. one kind is incited somebody to action wherein, and at least one thin slice comprises the method that a plurality of thin slices of thermoplastic material are bonded together, described method comprises the following steps:
(a) provide anvil element and embossing gap to form part, described embossing part has the surface with outwardly directed decorative pattern element, described method is characterised in that, comprise a kind of submissive material on the surface of described embossing part, described submissive material surrounds at least some described decorative pattern elements at least in part;
(b) gap that described thin slice can be offset by the effect of being stressed between described anvil element and the described embossing part with the aspectant relation of each several part; With
(c) under a part that is enough to compress described at least thin slice and described thin slice is bonded together with at least some pressure effect, make described gap form part and be offset toward each other, the cambium layer overlapping piece is not worn described laminates but do not prick.
14. one kind is incited somebody to action wherein, and at least one thin slice comprises the method that a plurality of thin slices of thermoplastic are bonded together, described method comprises the following steps:
(a) provide the gap of anvil element and embossing to form part, the surface of described embossing part has outwardly directed from it decorative pattern element;
(b) provide its various piece to become a plurality of thin slices of relation face-to-face; Described method is characterised in that it also comprises:
(c) on the zone of the described thin slice that will form joint, compress at least a portion of described thin slice; With
(d) make under the pressure effect that described thin slice is bonded together with at least some of described decorative pattern element being enough to, make described gap form part and be offset toward each other, the cambium layer overlapping piece is not worn described laminates but do not prick.
15. method as claimed in claim 14 is characterized in that, carries out before the joint of compression step (c) in step (d).
16. method as claimed in claim 14 is characterized in that, engaging simultaneously in compression step (c) and the step (d) carried out.
17., it is characterized in that at least one described thin slice comprises hygroscopic material as claim 13 or 14 described methods.
18., it is characterized in that the integrated thickness of described thin slice is more than or equal to about 2mm as claim 13,14 or 17 described methods.
19. one kind is incited somebody to action wherein, and at least one thin slice comprises the method that a plurality of thin slices of thermoplastic are bonded together, described method comprises the following steps:
(a) provide anvil element and embossing gap to form part, described embossing part has the surface with outwardly directed decorative pattern element, described method is characterised in that, have at least one to comprise at least one load supporting member in described anvil element and the described embossing part, when described embossing part and described anvil element form described gap, the height of described at least one load supporting member is enough to keep in touch with surperficial at least a portion of described anvil element;
(b) gap that described thin slice can be offset by the described pressurized between described anvil element and the described embossing part with the aspectant relation of each several part; With
(c) be enough to make under the pressure that at least some described thin slices are bonded together at least some described decorative pattern elements, make described gap form part and be offset toward each other, and the cambium layer overlapping piece.
20. method as claimed in claim 19 is characterized in that, anvil element and embossing part are the revolution roller.
21. method as claimed in claim 20 is characterized in that, described at least one load supporting member comprises at least one the continuous annulus of circumference in described anvil element and the embossing part.
22. as claim 20 or 21 described methods, it is characterized in that, surface area around the described decorative pattern element of described embossing roller circumference is inequality, can select the surface area of described at least one load supporting member, make the difference of the surface area of the described decorative pattern element that centers on described embossing part circumference be able to balance.
23. method as claimed in claim 21 is characterized in that, described at least one load supporting member has the zone that at least one cuts.
24. method as claimed in claim 23 is characterized in that, described decorative pattern element has the long-pending contact surface of belt surface, and, described at least one zone that cuts, the surface area of the contact surface on the size in plane graph and the decorative pattern element equates.
25., it is characterized in that even have between the described decorative pattern element at interval, described at least one load supporting member makes and keeps the minimum range of selection in advance between described anvil element axis and the described embossing part axis as claim 20 or 21 described methods.
26., it is characterized in that even gapped between the described decorative pattern element, described at least one load supporting member keeps in touch described anvil element and described embossing part as claim 20 or 21 described methods.
CNB988133180A 1997-11-26 1998-11-25 Methods of bonding materials, esp. materials used in absorbent articles Expired - Lifetime CN1209083C (en)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
US08/979,979 1997-11-26
US08/979,980 US6045544A (en) 1996-08-30 1997-11-26 Shaped absorbent interlabial device
US08/979,980 1997-11-26
US08/979,979 US5928452A (en) 1997-11-26 1997-11-26 Method of making a shaped absorbent interlabial device
US09/031,352 US5916205A (en) 1996-08-30 1998-02-26 Absorbent interlabial device
US09/031,352 1998-02-26

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CN1359281A (en) * 1999-06-30 2002-07-17 强生有限公司 Tampon having apertured film cover thermobonded to fibrous absorbent structure
US6537414B1 (en) 1999-06-30 2003-03-25 Hans-Werner Schoelling Sealing roller and sealing roller element particularly for producing a tampon for feminine hygiene and method therefor
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CN112414078B (en) * 2020-11-25 2022-02-15 浙江天博新材料有限公司 Drying device for wood-plastic floor

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CN110561864A (en) * 2019-08-23 2019-12-13 威海市鲁威塑业有限公司 Polyurethane fiber board bonding device of special wallboard for livestock breeding

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CN1548019A (en) 2004-11-24
CN1297243C (en) 2007-01-31
JP2001523537A (en) 2001-11-27
CA2311393C (en) 2004-10-19
CN1209083C (en) 2005-07-06
AU1607499A (en) 1999-06-15
CA2311393A1 (en) 1999-06-03
KR100439385B1 (en) 2004-07-09
WO1999026769A2 (en) 1999-06-03
WO1999026769A3 (en) 1999-09-02
KR20010032395A (en) 2001-04-16
EP1034067A2 (en) 2000-09-13
BR9815330A (en) 2002-02-26
AU749938B2 (en) 2002-07-04
KR20030033080A (en) 2003-04-26

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