DK2565013T3 - Fremgangsmåde til strækning af en foliebane - Google Patents

Fremgangsmåde til strækning af en foliebane Download PDF

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Publication number
DK2565013T3
DK2565013T3 DK11179885T DK11179885T DK2565013T3 DK 2565013 T3 DK2565013 T3 DK 2565013T3 DK 11179885 T DK11179885 T DK 11179885T DK 11179885 T DK11179885 T DK 11179885T DK 2565013 T3 DK2565013 T3 DK 2565013T3
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DK
Denmark
Prior art keywords
polymer component
film
web
film web
roller
Prior art date
Application number
DK11179885T
Other languages
English (en)
Inventor
Ludwig Börmann
Günter Schreiner
Original Assignee
Rkw Se
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
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Publication of DK2565013T3 publication Critical patent/DK2565013T3/da

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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D417/00—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00
    • C07D417/02—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00 containing two hetero rings
    • C07D417/06—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00 containing two hetero rings linked by a carbon chain containing only aliphatic carbon atoms
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    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/02—Adhesive plasters or dressings
    • A61F13/0203—Adhesive plasters or dressings having a fluid handling member
    • A61F13/0226—Adhesive plasters or dressings having a fluid handling member characterised by the support layer
    • A—HUMAN NECESSITIES
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    • 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
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    • A61F13/15731—Treating webs, e.g. for giving them a fibrelike appearance, e.g. by embossing
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    • A61F13/00—Bandages or dressings; Absorbent pads
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    • C07D—HETEROCYCLIC COMPOUNDS
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    • Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
    • Y10T442/674—Nonwoven fabric with a preformed polymeric film or sheet
    • Y10T442/678—Olefin polymer or copolymer sheet or film [e.g., polypropylene, polyethylene, ethylene-butylene copolymer, etc.]

Claims (10)

  1. 24
    1. Fremgangsmåde til fremstilling af et vlies-folie-laminat, hvilken fremgangsmåde omfatter følgende trin: 5 opvarmning af en udgangsfoliebane af termoplastisk polymermateriale, som har mindst én ved lav temperatur smeltende polymerkomponent, og mindst én ved høj temperatur smeltende polymerkomponent - indtil en delvis smeltet tilstand, hvor den mindste ene, ved lav temperatur smelten-10 de polymerkomponent i smelteflydende tilstand, og den mindst ved høj temperatur smeltende polymerkomponent ikke befinder sig i smelteflydende tilstand - og dette ved hjælp af mindst én varm valse, og afkøling ved, at man fører den delvis smeltede foliebane gennem en kølet valsespalte, og 15 at folien strækkes mellem den mindst ene varme valse og den kølede valsespalte, og hvor der opstrøms i forhold til den kølede valsespalte i det mindste findes to varme valser, som drives med forskellig hastighed, så at foliebanen mellem den første og anden varme valse strækkes, og hvor desuden en vlies-20 bane føres med over den anden varme valse og føres sammen med foliebanen gennem den kølede valsespalte.
  2. 2. Fremgangsmåde ifølge krav 1, kendetegnet ved, at der anvendes en udgangsfoliebane med 15 til 85 vægt % af den ved lav temperatur smeltende po- 25 lymerkomponent, og 85 til 15 vægt % af den ved høj temperatur smeltende polymerkomponent, baseret på 100 vægt % af de ved lav temperatur og høj temperatur smeltende polymerkomponenter.
  3. 3. Fremgangsmåde ifølge krav 1 eller 2, kendetegnet ved, at der anvendes 30 en udgangsfoliebane med mindst én polyethylen som den ved lav temperatur smeltende polymerkomponent og med mindst én polypropylen som den ved høj temperatur smeltende polymerkomponent. 25
  4. 4. Fremgangsmåde ifølge et af de foregående krav 1 til 3, kendetegnet ved, at opvarmningen af udgangsfoliebanen foretages til 5 til 20°C under krystallit-smeltepunktet for den mindst ene, ved høj temperatur smeltende polymerkomponent. 5
  5. 5. Fremgangsmåde ifølge et af de foregående krav, kendetegnet ved, at foliebanen strækkes med et strækforhold på mindst 1:1,2, fortrinsvis 1:1,5, især mindst 1:2.
  6. 6. Fremgangsmåde ifølge et af de foregående krav, kendetegnet ved, at de valser, der danner den kølede valsespalte, drives ved en hastighed, som er højere end den hastighed, hvormed den mindst ene varme valse drives.
  7. 7. Fremgangsmåde ifølge et af de foregående krav, kendetegnet ved, at der 15 opstrøms i forhold til den kølede valsespalte findes to valser, som drives med en sådan hastighed, at foliebanen strækkes mellem den første og anden valse, og hvor mindst den første af de to valser er udformet som en varm valse.
  8. 8. Fremgangsmåde ifølge et af de foregående krav, kendetegnet ved, at fo-20 liebanen i den kølede valsespalte underkastes en afkøling på 10 til 30°C under krystallit-smeltepunktet for den mindst ene, ved lav temperatur smeltende polymerkomponent.
  9. 9. Vlies-folie-laminat, som er fremstillet ved en fremgangsmåde ifølge et af 25 kravene 1 til 8, hvor foliebanen har en tykkelse i området 2 til 13 pm.
  10. 10. Anvendelse af vlies-folie-laminatet ifølge krav 9 på det hygiejniske eller medicinske område, især til bagside-lag i bleer, til indlæg på senge eller i hygiejnebind.
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