EP0943731B1 - Matière filtrante avec mouillabilité réglable et son procédé de fabrication - Google Patents

Matière filtrante avec mouillabilité réglable et son procédé de fabrication Download PDF

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Publication number
EP0943731B1
EP0943731B1 EP98105114A EP98105114A EP0943731B1 EP 0943731 B1 EP0943731 B1 EP 0943731B1 EP 98105114 A EP98105114 A EP 98105114A EP 98105114 A EP98105114 A EP 98105114A EP 0943731 B1 EP0943731 B1 EP 0943731B1
Authority
EP
European Patent Office
Prior art keywords
filter material
material according
basis weight
substance
bags
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.)
Expired - Lifetime
Application number
EP98105114A
Other languages
German (de)
English (en)
Other versions
EP0943731A1 (fr
Inventor
Günter Grauer
Yves Le Brech
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.)
PAPCEL - PAPIER und CELLULOSE TECHNOLOGIE und HANDELS-GmbH
Schoeller und Hoesch GmbH
Original Assignee
PAPCEL - PAPIER und CELLULOSE TECHNOLOGIE und HANDELS-GmbH
Schoeller und Hoesch GmbH
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 PAPCEL - PAPIER und CELLULOSE TECHNOLOGIE und HANDELS-GmbH, Schoeller und Hoesch GmbH filed Critical PAPCEL - PAPIER und CELLULOSE TECHNOLOGIE und HANDELS-GmbH
Priority to DE59800843T priority Critical patent/DE59800843D1/de
Priority to EP98105114A priority patent/EP0943731B1/fr
Priority to AT98105114T priority patent/ATE202171T1/de
Priority to ES98105114T priority patent/ES2159903T3/es
Publication of EP0943731A1 publication Critical patent/EP0943731A1/fr
Application granted granted Critical
Publication of EP0943731B1 publication Critical patent/EP0943731B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D85/00—Containers, packaging elements or packages, specially adapted for particular articles or materials
    • B65D85/70—Containers, packaging elements or packages, specially adapted for particular articles or materials for materials not otherwise provided for
    • B65D85/804—Disposable containers or packages with contents which are mixed, infused or dissolved in situ, i.e. without having been previously removed from the package
    • 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
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/08—Filter paper

Definitions

  • the invention relates to a filter material, in particular tea bags, and a method for producing and using the same.
  • Filter bags for cold and hot filtration e.g. Tea bags, coffee bags (see also DE-C-39 02 298), filter bags for flavors, spices and cooking bags e.g. for rice and vegetables; Filter papers for tea and coffee, for those Beverage industry, for medical applications and as well Filtration of oils and emulsions from heat sealable and filter materials that are not heat-sealable.
  • hydrophilic filter papers immediately show a swelling behavior after contact with water that changes affects that the paper absorbs moisture heavily, swelling of the paper fibers begins and itself thereby the number of openings between the fibers and the Size of the openings changes.
  • a disadvantage of this hydrophobization is, however, that the water-repellent fiber property during leaching a teabag made from it a much larger one Takes time than an untreated one conventional pouch.
  • a tea or coffee filter made from such a is made hydrophobic filter material, the Increase the filtering time of the water in the filter so far that a machine infusion there is a risk that the filter overflows.
  • US-A-4 289 580 describes a heat sealable material for tea bags, the heat seal layer to improve the Structured tea diffusion and to improve wettability treated with a wetting agent based on polyoxyethylene is.
  • EP-0 011 968 (A1) describes one made of polypropylene fibers existing bags or bags containing polypropylene fibers Detergent made with a water-soluble material or a removable water-insoluble material is coated.
  • GB-1 307 637 describes an infusion bag for drinks, which opens under the influence of hot water.
  • the through hot water opening closure of the bag is made for example from gelatin, an alginic acid salt or ester, Methyl cellulose, carboxymethyl cellulose or a mixture of this.
  • US-A-4 713 285 describes a glass fiber filter material for Use under high temperature conditions, e.g. as a filter in the automotive industry for filtering hot air Paint drying ovens.
  • the fiber matrix contains one in cold Organic water insoluble, hot water soluble Binder.
  • the present invention is therefore based on the object by controlling water wettability and water absorption of the filter material, i.e. through appropriate treatment of the filter material, an interplay between hydrophobic and hydrophilic properties (amphiphilic) of the To achieve filter material, so that a filter material is obtained in which after processing into an infusion bag or avoided the disadvantages described above for a filter become.
  • Another object of the present invention is a Process for producing such a filter material specify.
  • One embodiment of the present invention is the subject thus the filter material according to claim 1.
  • Preferred Embodiments of this filter material are shown in FIGS Subclaims 2 to 11 and in claim 12.
  • Another object of the present invention is a Process for producing such a filter material according to claim 13, and use of the same.
  • the filter material according to the invention which is impregnated with a hydrophilic and a hydrophobic substance, expediently has a basis weight between 10-120 g / m 2 , preferably 12-40 g / m 2 , it being possible for the filter material not to be heat-sealable or heat-sealable.
  • the filter material according to the invention has a controlled one Water wettability and water absorption. Under the Term "controlled water wettability and water absorption capacity" it is understood here and below that the Filter material has water wettability and water absorption capacity owns one between those completely hydrophobic filter material (0%) and one hydrophilic filter material (100%). Conveniently the filter material according to the invention has water wettability and water absorption in the range of 10% to 90%, preferably in the range of 10% to 50%.
  • the Water wettability and water absorption capacity can be e.g. using a suction level test, i.e. ever the filter material is more hydrophilic (if the proportion of hydrophilizing agent is larger) the higher the suction height. According to the suction level test was carried out under the conditions according to DIN 53106 (synonymous with ISO 8787).
  • Hydrophobic substances are among others:
  • Styrene-maleic anhydride copolymers styrene-butadiene copolymers, Polystyrene (PS), polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polyvinyl acetate (PVAc), Polyacrylamide, polymethacrylates, polyacrylates, polytetrafluoroethylene (PTFE), polyvinylidene chloride (PVDC), polyvinylidene fluoride (PVDF), silicone resins, terpene resins, ketone resins, Coumarone resins, styrene-acrylic acid copolymers, such as n-butyl acrylate-styrene copolymer, Ethyl cellulose (EC), cellulose acetate and Dimethylpolysiloxanes, preferably styrene-maleic anhydride copolymers, Styrene-butadiene copolymers and styrene-acrylic acid
  • Hydrophilic substances are among others:
  • PEG Polyethylene glycols
  • MC methyl cellulose
  • HPMC hydroxypropyl methyl cellulose
  • HPPC hydroxypropyl cellulose
  • HPC Hydroxypropyl methyl cellulose phthalate
  • PVP polyvinyl pyrrolidone
  • PVA polyvinyl alcohol
  • PEG polyacrylic acids
  • Gelatin alginates and sulfosuccinates, preferably Sulfosuccinates, especially sodium dialkyl sulfosuccinate.
  • the amount added is for the hydrophobic substances expediently 0.5-20%, preferably 10%, and in the hydrophilic substances expediently 0.01-5%, preferably 0.05%, based on the paper weight.
  • the amount added preferably 0.05% hydrophilic and 10% hydrophobic substances.
  • a filter material with one hydrophobic and one treated hydrophilic substance In the process of producing a filter material with Controlled water wettability and water absorption according to the present invention, a filter material with one hydrophobic and one treated hydrophilic substance.
  • a filter material is generally produced in a manner known in the relevant art Application of an aqueous suspension of natural fibers and / or synthetic fibers on a paper machine wire.
  • the heat-sealable, synthetic Fibers deposited on the first layer and by a subsequent one Drying process melted the synthetic fibers, so that it deals with the natural fibers of the first layer connect.
  • the filter material produced according to the invention can be excellent for the production of filters for aqueous hot or cold filtration, filter bags for drinks or flavors, Cooking bags, filters for medical applications and of Use filters to filter emulsions or oils.
  • the filter material according to the invention can preferably be used for the production of tea bags.
  • Preferred subject Embodiment of the present invention is thus one of the tea bag produced according to the filter material according to the invention.
  • Figure 1 shows a tea bag on the right, whose paper only is equipped hydrophobically and with the infusion upwards floats, with part of the bag not wetted by the water becomes.
  • the left teabag whose paper also hydrophilizes is located in the lower part of the vessel and becomes complete wetted. Through the precise setting of an amphiphilic paper property the tea bag made from it can then e.g. are held in the middle of the vessel, where experience has shown that Temperature is very high and the infusion is the fastest.
  • Figure 2 shows the course of the color intensity development of the Extract when infusing a tea bag as a function of time.
  • Curve 1 shows the course of the color development of a Extract from a tea bag, which is only hydrophobic equipped filter material was manufactured.
  • Curve 2 shows the color development of an extract from a tea bag an additional hydrophilized filter material. It is clear the faster color development (curve 2) within about 2 min. observed with the additionally hydrophilized bag.
  • a tea bag is placed in a beaker of boiling water poured over and the liquid with a magnetic stirrer constant kept moving.
  • the tea is infused by a continuously operating pump through a cell into the spectrophotometer. At a fixed wavelength is then dependent on the Time (X-axis) the spectral absorption of light (Y-axis) of the tea infusion.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filtering Materials (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Laminated Bodies (AREA)

Claims (15)

  1. Matériau filtrant, caracterisé en ce qu'il est traité avec une substance hydrophile et une substance hydrophobe pour réguler la mouillabilité par l'eau et la capacité d'absorption vis-à-vis de l'eau.
  2. Matériau filtrant selon la revendication 1, caractérisé en ce que le matériau filtrant présente une masse surfacique comprise entre 10 et 120 g/m2.
  3. Matériau filtrant selon la revendication 2, caractérisé en ce que le matériau filtrant présente une masse surfacique comprise entre 12 et 40 g/m2.
  4. Matériau filtrant selon l'une quelconque des revendications précédentes, caractérisé en ce que la substance hydrophobe est choisie parmi au moins une des substances suivantes : les copolymères anhydride maléique/styrène, les copolymères butadiène/styrène, les copolymères acide acrylique/styrène, le polystyrène (PS), le polyéthylène (PE), le polypropylène (PP), le poly(chlorure de vinyle) (PVC), le poly(acétate de vinyle) (PVAc), le polyacrylamide, les polyméthacrylates, le polytétrafluoréthylène (PTFE), le poly(chlorure de vinylidène) (PVDC), le poly(fluorure de vinylidène) (PVDF), les résines siliconées, les résines terpéniques, les résines cétoniques, les résines de coumarone, l'éthylcellulose (EC), l'acétate de cellulose et le diméthylpolysiloxane.
  5. Matériau filtrant selon l'une quelconque des revendications précédentes, caractérisé en ce que la substance hydrophile est choisie parmi au moins une des substances suivantes : les polyéthylèneglycols (PEG), la méthylcellulose (MC), l'hydroxypropylméthylcellulose (HPMC), l'hydroxypropylcellulose (HPC), le phtalate d'hydroxypropylméthylcellulose (HPMCP), la polyvinylpyrrolidone (PVP), le poly(alcool vinylique) (PVA), les poly(acides acryliques), les gélatines, les alginates et les sulfosuccinates.
  6. Matériau filtrant selon l'une quelconque des revendications précédentes, caractérisé en ce que la substance hydrophobe a été appliquée en une quantité de 0,5 à 20%, rapportée à la masse surfacique du papier.
  7. Matériau filtrant selon l'une quelconque des revendications précédentes, caractérisé en ce que la substance hydrophobe a été appliquée en une quantité de 10%, rapportée à la masse surfacique du papier.
  8. Matériau filtrant selon l'une quelconque des revendications précédentes, caractérisé en ce que la substance hydrophile a été appliquée en une quantité de 0,01 à 5%, rapportée à la masse surfacique du papier.
  9. Matériau filtrant selon l'une quelconque des revendications précédentes, caractérisé en ce que la substance hydrophile a été appliquée en une quantité de 0,05%, rapportée à la masse surfacique du papier.
  10. Matériau filtrant selon l'une quelconque des revendications précédentes, caractérisé en ce que le matériau filtrant dont il est question est un matériau filtrant thermosoudable.
  11. Matériau filtrant selon l'une quelconque des revendications 1 à 9, caractérisé en ce que le matériau filtrant dont il est question est un matériau filtrant non thermosoudable.
  12. Sachet de thé, fabriqué à partir d'un matériau filtrant selon l'une quelconque des revendications précédentes.
  13. Procédé pour fabriquer un matériau filtrant, caractérisé en ce que l'on traite le matériau filtrant avec une substance amphiphile ou avec une substance hydrophobe et une substance hydrophile pour réguler la mouillabilité par l'eau et la capacité d'absorption vis-à-vis de l'eau.
  14. Utilisation d'un matériau filtrant selon l'une quelconque des revendications 1 à 11 pour fabriquer les filtres pour la filtration aqueuse à froid ou à chaud, les sachets filtres pour boissons ou arômes, les sachets de cuisson, les filtres pour les applications médicales ainsi que les filtres pour la filtration d'émulsions ou d'huiles.
  15. Utilisation selon la revendication 14, caractérisée en ce que le matériau filtrant est utilisé pour la fabrication de sachets de thé, filtres à thé, sachets de café et filtres à café.
EP98105114A 1998-03-20 1998-03-20 Matière filtrante avec mouillabilité réglable et son procédé de fabrication Expired - Lifetime EP0943731B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE59800843T DE59800843D1 (de) 1998-03-20 1998-03-20 Filtermaterial mit einstellbarer Benetzbarkeit und Verfahren zu seiner Herstellung
EP98105114A EP0943731B1 (fr) 1998-03-20 1998-03-20 Matière filtrante avec mouillabilité réglable et son procédé de fabrication
AT98105114T ATE202171T1 (de) 1998-03-20 1998-03-20 Filtermaterial mit einstellbarer benetzbarkeit und verfahren zu seiner herstellung
ES98105114T ES2159903T3 (es) 1998-03-20 1998-03-20 Material filtrante humectable de forma regulable y procedimiento para su fabricacion

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP98105114A EP0943731B1 (fr) 1998-03-20 1998-03-20 Matière filtrante avec mouillabilité réglable et son procédé de fabrication

Publications (2)

Publication Number Publication Date
EP0943731A1 EP0943731A1 (fr) 1999-09-22
EP0943731B1 true EP0943731B1 (fr) 2001-06-13

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ID=8231631

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98105114A Expired - Lifetime EP0943731B1 (fr) 1998-03-20 1998-03-20 Matière filtrante avec mouillabilité réglable et son procédé de fabrication

Country Status (4)

Country Link
EP (1) EP0943731B1 (fr)
AT (1) ATE202171T1 (fr)
DE (1) DE59800843D1 (fr)
ES (1) ES2159903T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7517581B2 (en) 2003-09-26 2009-04-14 Parker-Hannifin Corporation Semipermeable hydrophilic membrane

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002031263A1 (fr) * 2000-10-09 2002-04-18 Dynamic Products Limited Sachet d'infusion a fraicheur amelioree et a perte de particules reduite
DE10062031C2 (de) * 2000-12-13 2003-03-27 Schoeller & Hoesch Papierfab Filtermaterial mit verbesserten Infusionseigenschaften
GB0302250D0 (en) * 2003-01-31 2003-03-05 Dynamic Products Ltd Treated fibres for making a beverage infusion package with improved freshness and a beverage infusion package made therefrom
CN104822870B (zh) 2013-01-31 2017-10-27 格拉特菲尔特盖恩斯巴赫股份有限公司 用于纸或非织造网的交联/功能化系统

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1053933A (fr) * 1900-01-01
GB1307637A (en) * 1970-07-28 1973-02-21 Paterson Sons Ltd R Packaging for beverages
AU5292479A (en) * 1978-11-17 1980-05-22 Unilever Ltd. Detergent bag
US4289580A (en) * 1979-11-13 1981-09-15 The Dexter Corporation Heat seal fibrous web and method of its manufacture
US4713285A (en) * 1986-05-02 1987-12-15 Frederick G. Crane, Jr. High temperature filter material
DE3713609A1 (de) * 1987-04-23 1988-11-10 Jacobs Suchard Gmbh Filter, insbesondere kaffeefilter, sowie verfahren zur herstellung eines solchen filters
US5431997A (en) * 1993-07-01 1995-07-11 The Dexter Corporation Process of producing porous web materials used for making infusion packages for brewing beverages and the web materials thus produced
US5595659A (en) * 1995-02-17 1997-01-21 Lydall, Inc. Filter material for removing chlorine from cold water in preparing a human-consumable beverage

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7517581B2 (en) 2003-09-26 2009-04-14 Parker-Hannifin Corporation Semipermeable hydrophilic membrane

Also Published As

Publication number Publication date
ES2159903T3 (es) 2001-10-16
DE59800843D1 (de) 2001-07-19
ATE202171T1 (de) 2001-06-15
EP0943731A1 (fr) 1999-09-22

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