EP0019628A1 - Materiau micro-poreux et sachet scelle a la chaleur prepare avec ce materiau - Google Patents

Materiau micro-poreux et sachet scelle a la chaleur prepare avec ce materiau

Info

Publication number
EP0019628A1
EP0019628A1 EP79901580A EP79901580A EP0019628A1 EP 0019628 A1 EP0019628 A1 EP 0019628A1 EP 79901580 A EP79901580 A EP 79901580A EP 79901580 A EP79901580 A EP 79901580A EP 0019628 A1 EP0019628 A1 EP 0019628A1
Authority
EP
European Patent Office
Prior art keywords
heat
paper
water
micronized
bag
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.)
Ceased
Application number
EP79901580A
Other languages
German (de)
English (en)
Inventor
Douglas Lennaard
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.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0019628A1 publication Critical patent/EP0019628A1/fr
Ceased legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
    • D21H19/52—Cellulose; Derivatives thereof
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
    • A61L2/26—Accessories or devices or components used for biocidal treatment
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/38—Coatings with pigments characterised by the pigments
    • D21H19/40—Coatings with pigments characterised by the pigments siliceous, e.g. clays

Definitions

  • MICROPOROUS MATERIAL AND A HEAT-SEALABLE BAG PREPARED THEREOF MICROPOROUS MATERIAL AND A HEAT-SEALABLE BAG PREPARED THEREOF.
  • the present invention relates to a microporous material and a heat-sealable bag prepared thereof, which bag is especially suitable for heat sterilization and storage in a sterile condition of articles such as surgical instruments and similar.
  • bags for sterilization and storage in a sterile condition of e.g. surgical instruments and similar which bags consist of two usually rectangular plane sheets, one of which consists of a heat-sealable, gas impenetrable transparent material which makes it possible to see the object packed in the bag, the other one consisting of a microporous paper.
  • the both sheets have essentially the same shape and are located one above the other and heat-sealing is made along three edges to the formation of a bag.
  • the instrument or the object to be sterilized and stored in a sterile condition in the bag is introduced therein, whereupon the fourth edge is heat-sealed.
  • the finished package with its contents is sterilized with heat in a conventional manner. During the sterilization air enclosed in the package can escape through the pores in the paper side of the bag.
  • the pore size of the paper is such that air borne microorganisms cannot pass through the pores which would cause a loss of the sterility.
  • the paper used must have a pore size which is lesser than the size of prevalent microorganisms, viz. lesser than about 30 ⁇ m and suitably within the range 10 - 20 ⁇ m, preferably about 12 ⁇ m. It is obvious that the values of the pore size must be valid for all pores. It is thus not possible to tolerate an average pore size with the values given, viz. the occurrence of e.g. 10% pores with a size up to 100 ⁇ m.
  • a package of the type described above containing sterile articles is opened by tearing away material corners which located outsides of a heat-sealed edge.
  • the sealing is broken in the paper material and this will cause parts of the surface layer of the paper to follow the heat-sealed transparent material. This will unavoidably cause the liberation of a great number of paper fibres which is regarded to be very, unsuitable and unacceptable since the fibres can enter into the tissues and act disturbing in several contexts.
  • a third purpose with the invention is thus to achieve a coating on the paper which causes that no paper fibres are liberated when the sterile package or bag is opened.
  • a for the purpose conventional material in the sheet form which has an average pore size within the range 20 - 100 ⁇ m is coated on the one side with a viscous suspension of a micronized powderous material such as talcum in water admixed with a suitable amount of a thickening agent such as a cellulose derivative, e.g. carboxy methyl cellulose.
  • the thickening agent has two functions, viz. partly it keeps the powderous material in suspension during the application and partly it acts as a binder for the powder after drying. Good-results have been obtained-with a suspension consisting of 2000 g of talcum of commercial quality, 200 g of "MODO-COLL®” and 5000 g of water.
  • the prepared suspension is suitably applied on the one side of the paper web in a conventional manner in a rolling mill provided with a doctor blade to the formation of a thin layer on the paper which subsequently is dried in a heated tunnel. It has been found that paper which has been surface-treated in the said manner obtains a unitary pore size of about 12 ⁇ m.
  • the untreated paper had an average pore size of 26 ⁇ m with numerous pores with a larger size.
  • thickening agent or binding agent in the suspension it is possible to use numerous different materials, viz. gelling agents or commonly used types such as different cellulose derivatives, e.g. carboxy alkyl cellulose, but also other types such as gums can be used, e.g. gummmi arabicum, in combination with a suitable minor amount of a softening agent such as glycerol.
  • gelling agents or commonly used types such as different cellulose derivatives, e.g. carboxy alkyl cellulose, but also other types such as gums can be used, e.g. gummmi arabicum, in combination with a suitable minor amount of a softening agent such as glycerol.
  • a binding agent and a suspending agent of a certain material is easily determined by practical experiments.
  • the above-mentioned commercial product "M0D0-C0LL®" has been found to be well suitable.
  • the preferred micronized powderous material is talcum, but also other materials such as chalk, dolomite, barium sulphate and different types of clay, etc. can be used as well as mixtures thereof.
  • the material shall, of course, be micronized in the sufficient degree. It has been found that a suitable particle size distribution is about 80 - 90% of 40 - 100 ⁇ m and about 10% within the range 70 - 40 ⁇ m.
  • the transparent plastic material used for the preparation of a heat-sealable bag according to the invention consists suitably of a commercially available plastic foil laminate comprising two layers, viz. one layer of polypropylene and a second layer of polyester material.
  • the polypropylene has a lower melting temperature and is facing the paper side during the lamination.
  • the polyester layer has a better heat resistance and is required to give mechanical rigidity to the transparent layer during the heat-sealing.
  • the sterile packages prepared according to the invention do not cause fibre-formation when the sealing is opened. Further, the tearing force required for opening is easily controllable and more unitary over the whole sealed area.
  • micronized material consists of a mixture of about 75% of talcum and about 25% of chalk, calculated on the weight.
  • Bags according to the invention can, as mentioned above, be used for heat sterilization of all kinds of goods, especially surgical instruments and other articles.
  • the manufacture of the paper with a controlled pore size and the bags per se is made in a manner known per se with the use of commonly available apparatus.

Landscapes

  • Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Apparatus For Disinfection Or Sterilisation (AREA)
  • Materials For Medical Uses (AREA)
  • Laminated Bodies (AREA)
  • Wrappers (AREA)

Abstract

Sachet, dont un cote consiste en un materiau transparent impermeable aux gaz et l'autre cote consiste en du papier micro-poreux ou materiau en feuille similaire prepare a partir de fibres, le premier cote ayant ete revetu d'une couche d'une composition de revetement sous forme de boue visqueuse d'un materiau poudreux microscopique insoluble dans l'eau, de preference du talc, dans une suspension aqueuse d'un agent d'epaississement tel que de la methloycarboxycellulose pour controler la dimension des pores du papier et pour lier les fibres a la surface du papier lorsque le sachet est fabrique par scellement thermique des deux materiaux l'un contre l'autre. Le sachet fini contenant un instrument ou un produit est sterilise par la chaleur tandis que de l'air contenu dans le sachet peut s'echapper au travers des pores du papier, la dimension des pores etant telle que des micro organismes ne peuvent penetrer dans le sachet. Le sachet peut etre ouvert en dechirant la jointure thermique sans liberer les fibres du papier; l'invention comprendre materiau en feuille micro-poreux revetu de la composition de revetement.
EP79901580A 1978-11-16 1980-06-03 Materiau micro-poreux et sachet scelle a la chaleur prepare avec ce materiau Ceased EP0019628A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE7811816 1978-11-16
SE7811816A SE414621B (sv) 1978-11-16 1978-11-16 Forseglingsbar pase serskilt for steril forpackning av kirurgiska eller medicinska artiklar

Publications (1)

Publication Number Publication Date
EP0019628A1 true EP0019628A1 (fr) 1980-12-10

Family

ID=20336369

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79901580A Ceased EP0019628A1 (fr) 1978-11-16 1980-06-03 Materiau micro-poreux et sachet scelle a la chaleur prepare avec ce materiau

Country Status (6)

Country Link
EP (1) EP0019628A1 (fr)
JP (1) JPS55500938A (fr)
DK (1) DK297180A (fr)
FI (1) FI793575A (fr)
SE (1) SE414621B (fr)
WO (1) WO1980001062A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI873939A0 (fi) * 1987-09-11 1987-09-11 Ahlstroem Oy Steriliseringsfoerpackning foer engaongsbruk.

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE625893A (fr) * 1961-03-27
US3503497A (en) * 1968-07-25 1970-03-31 Pall Corp Breather container
SE385683B (sv) * 1973-01-16 1976-07-19 Landstingens Inkopscentral Sterilpase

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8001062A1 *

Also Published As

Publication number Publication date
DK297180A (da) 1980-07-10
SE7811816L (sv) 1980-05-17
WO1980001062A1 (fr) 1980-05-29
SE414621B (sv) 1980-08-11
JPS55500938A (fr) 1980-11-13
FI793575A (fi) 1980-05-17

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Legal Events

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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AK Designated contracting states

Designated state(s): AT CH DE FR GB LU NL

17P Request for examination filed

Effective date: 19801128

STAA Information on the status of an ep patent application or granted ep patent

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18R Application refused

Effective date: 19820728

ITF It: translation for a ep patent filed