Classifications

• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
  • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
  • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
  • D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
  • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
  • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
  • D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
  • D04H1/541—Composite fibres, e.g. sheath-core, sea-island or side-by-side; Mixed fibres
  • D04H1/5412—Composite fibres, e.g. sheath-core, sea-island or side-by-side; Mixed fibres sheath-core
• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
  • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
  • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
  • D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
  • D04H1/542—Adhesive fibres
  • D04H1/55—Polyesters
• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
  • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
  • D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
  • D04H3/14—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic yarns or filaments produced by welding
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
  • Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
  • Y10T442/637—Including strand or fiber material which is a monofilament composed of two or more polymeric materials in physically distinct relationship [e.g., sheath-core, side-by-side, islands-in-sea, fibrils-in-matrix, etc.] or composed of physical blend of chemically different polymeric materials or a physical blend of a polymeric material and a filler material
  • Y10T442/642—Strand or fiber material is a blend of polymeric material and a filler material

Definitions

• the invention relates to infusion bags, comprising a layer of a nonwoven fabric of bicomponent fibers and / or filaments of a refractory and a low-melting component, wherein the refractory component comprises a polyester.
• Infusion bags of the type mentioned are for example from JP 2004338750 A and JP 2004242944 A known.
• the known infusion bags consist of a spunbonded core / sheath fibers with a high-melting core component and a low-melting sheath component.
• the high-melting core component consists of a polyester, in particular polyethylene terephthalate, the low-melting jacket component of polypropylene or polyethylene.
• the low melting sheath component is responsible for the heat sealability of the material.
• the melting points of polyester and polypropylene are high enough to prevent dissolution of the material when immersed in the hot water to brew the ingredients.
• According to the JP 2004242944 A should he Melting point of the refractory component at least 50 ° C above the melting point of the low-melting component.
• a disadvantage of the known infusion bags is that it can come to confections at the interfaces of the material during assembly.
• the invention is based on the object to further develop a brewing bag of the type mentioned so that the problems described above in the packaging do not occur.
• This object is achieved by an infusion bag having all the features of patent claim 1.
• Advantageous embodiments of the invention are described in the subclaims.
• an infusion bag comprising a layer of a non-woven fabric of bicomponent fibers and / or filaments of a refractory and a low-melting component, wherein the refractory component comprises a polyester
• the low-melting component is a high-melting component
• Polymer having a melting point ⁇ 200 ° C includes.
• co-polyethylene terephthalate (CoPET) and / or polybutylene terephthalate (PBT) are suitable as the sheath component.
• the melting points of these materials are about 180 to 225 ° C.
• PET Polyethylene terephthalate
• Bicomponent fibers or filaments per se of CoPET / PET are known. They are commonly used as binder fibers / filaments for a variety of applications. They are characterized not only by an extraordinary temperature stability, but also by a very high rigidity, which was why it was expected that they were unsuitable for the application described. Polyethylene and polypropylene are more soft materials that provide some flexibility to the nonwoven fabric, greatly simplifying its processibility into a tea bag.
• nonwovens made of bicomponent fibers / filaments of CoPET / PET or PBT / PET are easy to process despite the high rigidity.
• the welding of the material to infusion bags can be done in a simple manner by applying thermal energy or by ultrasonic welding. During further assembly, the problem of smeared cut edges does not occur.
• the visual impression of an infusion bag is significantly improved by the high rigidity of the material.
• An inventive infusion bag is characterized by an improved pop-up function. This means that the infusion bag is dimensionally stable and also in mechanical deformations, e.g. in the packaging, after taking out its original shape again.
• the bicomponent fibers or filaments are preferably formed as core / sheath fibers / filaments.
• the present invention is by no means limited to this type of bicomponent fibers / filaments.
• the bicomponent fibers / filaments can be formed, for example, from side-by-side fibers.
• the infusion bag according to the invention is preferably made of a spunbonded nonwoven, in which the risk of detachment of individual fibers, as may be the case, for example, when using staple fibers, is only slight.
• the basis weight of the nonwoven fabric used for the infusion bag according to the invention is preferably between 10 and 30 g / m 2 , more preferably between 16 and 22 g / m 2 . At lower basis weights, the nonwoven layer becomes too uneven, at higher basis weights the transparency of the material is compromised.
• the thickness of the nonwoven material used is preferably between 0.05 and 0.15 mm, with a thickness of about 0.07 mm being preferred. If the thickness is too small, the stiffness of the material will decrease too much. The visual impression of an infusion bag made of this material is impaired. If the thicknesses are too large, on the other hand, the processability of the material deteriorates.
• the fiber or filament thickness of a nonwoven material used for an infusion bag according to the invention is preferably between 1 and 2.5 dtex, more preferably about 1.7 dtex. If the filament or fiber thicknesses are too low, the material becomes so dense that the fluid or drug exchange is impaired. Too large fiber thicknesses may lead to failure of the drug involved, come.
• the penetration rate should preferably be less than 3 percent.
• the penetration rate of the nonwoven fabric is understood to mean the passage or precipitation of certain tea particle grain fractions through the nonwoven fabric structure.
• a low penetration rate means that the tea particles / ingredients are largely retained in the spout bag.
• the per-hole throughput is preferably between 0.4 and 0.7 g per hole and minute. This range of per hole throughputs has been found to be advantageous in terms of resulting web properties, penetration rates, economy and processability.
• An infusion bag according to the invention is characterized by high strength and media resistance. At the same time, it has a high permeability for the liquids used for the infusion as well as for the substances extracted during the infusion, while undesired fine and very fine particles are reliably retained in the bag.
• the material is highly transparent and therefore very suitable, in particular for those applications in which, in addition to the good infusion properties, the optical appearance is additionally important, for example in the field of tea bags.
• An infusion bag according to the invention is therefore preferably used as a tea bag.
• the very good visual impression is reinforced by the high pop-up capacity of the bag.
• nonwoven fabric according to the invention is the use as a coffee pod.
• a less transparent material is usually preferred by the end users, which can be realized in a simple manner, for example, by the use of gravure rolls in calendering the nonwoven fabric.
• the infusion bag according to the invention can generally be used as a container for active substances, both for hot and cold applications.
• the use is generally conceivable in the hot drinks or soft drinks sector.
• the use for example for soups are also conceivable.
• infusion bags according to the invention can be used.
• the infusion bag according to the invention is by no means limited to the applications described.

Landscapes

• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Packages (AREA)
• Medical Preparation Storing Or Oral Administration Devices (AREA)
• Laminated Bodies (AREA)
• Nonwoven Fabrics (AREA)

Applications Claiming Priority (1)

Publications (2)

Family

ID=38669845

Family Applications (1)

Country Status (3)

Cited By (1)

Families Citing this family (1)

Citations (2)

Family Cites Families (11)

• 2006
  • 2006-07-27 DE DE200610034730 patent/DE102006034730A1/de not_active Withdrawn
• 2007
  • 2007-06-30 EP EP20070012869 patent/EP1882765A3/fr not_active Withdrawn
  • 2007-07-27 US US11/829,619 patent/US7718206B2/en not_active Expired - Fee Related

Patent Citations (2)

Also Published As

Similar Documents

Legal Events