EP1993399B1 - Mehrfilamentige borsten für zahnbürsten - Google Patents

Mehrfilamentige borsten für zahnbürsten Download PDF

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Publication number
EP1993399B1
EP1993399B1 EP07703053.4A EP07703053A EP1993399B1 EP 1993399 B1 EP1993399 B1 EP 1993399B1 EP 07703053 A EP07703053 A EP 07703053A EP 1993399 B1 EP1993399 B1 EP 1993399B1
Authority
EP
European Patent Office
Prior art keywords
bristle
filament
filaments
etching process
bristles
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.)
Active
Application number
EP07703053.4A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1993399A1 (de
Inventor
Christine Zoschke
Thorsten Emge
Jürgen DORNHEIM
Christian Stief
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.)
Braun GmbH
Original Assignee
Braun 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 Braun GmbH filed Critical Braun GmbH
Publication of EP1993399A1 publication Critical patent/EP1993399A1/de
Application granted granted Critical
Publication of EP1993399B1 publication Critical patent/EP1993399B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46D—MANUFACTURE OF BRUSHES
    • A46D1/00—Bristles; Selection of materials for bristles
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46D—MANUFACTURE OF BRUSHES
    • A46D1/00—Bristles; Selection of materials for bristles
    • A46D1/02—Bristles details
    • A46D1/023—Bristles with at least a core and at least a partial sheath
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46D—MANUFACTURE OF BRUSHES
    • A46D1/00—Bristles; Selection of materials for bristles
    • A46D1/02—Bristles details
    • A46D1/0276—Bristles having pointed ends
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46D—MANUFACTURE OF BRUSHES
    • A46D1/00—Bristles; Selection of materials for bristles
    • A46D1/02—Bristles details
    • A46D1/0292—Bristles having split ends
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46D—MANUFACTURE OF BRUSHES
    • A46D1/00—Bristles; Selection of materials for bristles
    • A46D1/04—Preparing bristles
    • A46D1/05—Splitting; Pointing

Definitions

  • the invention relates to a bristle according to the preamble of claim 5, a method for producing or processing bristles according to the preamble of claim 1 and a bristle, in particular toothbrush.
  • Bristles for toothbrushes are typically made of polyester or nylon monofilaments, that is, of plastic filaments which are extruded, stretched and fixed.
  • Nylon bristles are flexible, easily deformable and especially water absorbent. They must therefore be designed relatively thick, so that given flexibility requirements can be achieved. This requires rounding the bristle ends to prevent injury to the gums.
  • polyester bristles made of, for example, polybutylene terephthalate (PBT) and / or polyethylene terephthalate (PET) have a low water absorption rate and good durability properties.
  • PBT polybutylene terephthalate
  • PET polyethylene terephthalate
  • these bristles usually do not meet the requirements of elasticity or bending stiffness. They are typically too stiff and inflexible and can thus lead to damage to the gums.
  • polyester bristles are immersed in corrosive chemicals until the immersed portion of the monofilaments is completely eroded. This eventually leads to a tapered bristle end.
  • the chemically sharpened ends of the bristle are attacked and subject to massive damage due to the etching process.
  • the etching process thus produces a high reject rate which adversely affects the production costs.
  • the tapered bristles made of a monofilament have a low durability and an already too low flexural rigidity due to the eroded lateral surface.
  • the shape of the tapered bristles essentially determined solely by the etching process and can not be designed according to predetermined requirements.
  • the monofilament is split along the boundary layers between the at least two Polymers always provided the action of mechanical forces.
  • the mechanical introduction of slots, columns and flags is complex on the one hand and relatively imprecise on the other hand, because the formation of such gaps depends essentially on the amplitude and the direction of the applied force and the binding forces between the polymers.
  • the slots thus produced often have different and difficult to control lengths, irregular shapes and frayed lateral surfaces.
  • Bristles which can be produced by multi-component extrusion and which are tapered at the end region by material removal, rounded or configured in several individual filaments.
  • From the JP2003 339440 is a method for producing or processing bristles according to the preamble of claim 1 and a bristle according to the preamble of claim 5.
  • the present invention is therefore based on the object of providing tapered bristles, in particular for toothbrushes, with freely selectable geometry and improved elasticity properties. Furthermore, the invention has for its object to optimize a manufacturing or processing method for such bristles under production rational aspects.
  • the bristle according to the invention has in the longitudinal direction at least two jointly extruded filaments of different materials and is characterized in that the cross-sectional area of at least one of the two filaments decreases towards the free end of the bristle.
  • at least one of the at least two coextruded filaments changes its geometry in the region of the bristle end.
  • the two extruded filaments consist of different materials, such as polyester and polyamide, which can be subjected to a material-selective machining process to form the bristle according to the invention.
  • both the flexurally elastic properties of the bristle and its geometric configuration, in particular in the region of the bristle ends, can be designed almost as desired.
  • the cross-sectional area of the at least one filament steadily decreases toward the free end of the bristle.
  • a steady decrease in the cross-sectional area is accompanied by a continuously decreasing lateral surface and a continuously decreasing diameter of this bristle filament. Sharp corners or edges, the characteristics of discontinuously extending lateral surfaces or surfaces are thus avoided in an advantageous manner. The risk of injury to sensitive areas within the oral cavity, such as the gums, can thus be lowered advantageously.
  • the cross-sectional area of the free end of the bristle is substantially determined by the at least one other filament.
  • its cross-sectional area is substantially constant in the longitudinal direction of the bristles.
  • the at least one filament at the free end of the bristle has a cross-sectional area of zero, so that the total cross section of the bristle at the free end of the bristle is determined essentially by the remaining at least other filament.
  • the entire bristle can better meet the given elasticity or bending stiffness requirements correspond.
  • the bristle according to the invention is not chemically sharpened at its end of the filament and therefore also not attacked or otherwise damaged.
  • the at least one other filament is at least partially radially enclosed by the at least one filament.
  • this core sheathing finally tapers, until at the free end of the bristle only the other filament forming the bristle core remains and forms a tapered bristle cross section.
  • the at least other filament e.g. the core filament is wider in the axial direction than the one filament, e.g. the sheath filament extends.
  • the free end of the bristle is therefore formed only by that filament whose cross-sectional area does not change substantially.
  • a plurality of filaments not changing in cross-section are regularly distributed over the cross-section of the bristle and are surrounded by the at least one filament, the cross-sectional area of which has a change towards the bristle end, at least in regions in the radial direction.
  • a configuration can ultimately be formed at the bristle end that forms a plurality of individual filaments separated by gaps.
  • Such filament arrangements are advantageous, for example, for receiving dentifrices or dental or antibacterial preparations.
  • the at least other filament is rounded or rounded at its free end.
  • the filaments forming the free end of the bristle thus have essentially no edges which could lead to injuries in the oral cavity.
  • the at least two filaments have a different elasticity and / or a different bending stiffness.
  • the elasticity and / or bending stiffness properties of the bristle can be adjusted specifically to a predetermined level.
  • the at least one filament can be removed by means of an etchant, in particular a chemical etchant, such as sodium hydroxide, sulfuric acid or formic acid, wherein the at least other filament is substantially resistant to the respective chemical etchant.
  • an etchant in particular a chemical etchant, such as sodium hydroxide, sulfuric acid or formic acid
  • the free end of the bristle can be processed material selectively using a chemical etching process.
  • almost any elasticity properties of the bristle ends and correspondingly versatile bristle end geometries can be realized by any arrangement and geometry of individual filaments.
  • polyamide and / or polyester is provided as material for the filaments.
  • These materials have different elasticity and stiffness properties. Furthermore, only one of these materials is attacked by the chemicals intended for a chemical etching process, such as, for example, sodium hydroxide solution, sulfuric acid or formic acid, while the respective other material is substantially resistant to the chemical.
  • Nylon, PA 6.6, PA 6.10 and PA 6.12 are particularly suitable as the polyamide, while the polyester is essentially PET and / or PBT.
  • the invention relates to a method for producing or processing bristles, in particular toothbrush bristles, which have in the longitudinal direction at least two jointly extruded filaments of different materials.
  • the method is characterized in that at least one of the filaments in the region of the free end of the bristles is at least partially removed by means of a chemical etching process.
  • the at least one other filament is essentially resistant to the chemical used in the chemical etching process and corrodes at most to a negligible extent in the chemical etching process.
  • At least one filament which is substantially resistant to the etchant is exposed at least in areas, preferably in the region of the free end, by means of the etching process.
  • the parameters of the etching process such as immersion depth of the bristle ends in the chemical and their residence time in the chemical are preferably determined by the shape and the geometry, in particular to the radial dimensions of the filaments adapted. In this way, the etching process can be optimized so that the at least one filament in the region of the free end of the bristle are completely removed, so that there at least the other filaments can be substantially exposed.
  • the bristle core is formed by a resistant to the chemical used filament, which is radially enclosed by the corroded filaments in the etching process as a sheath.
  • the sheath of the multi-filament bristle surrounding the inner bristle core is removed in the chemical etching process in such a way that it tapers conically toward the bristle end. Consequently, only the bristle sheath tapers, while a bristle core that is chemically undamaged extends beyond the end of the bristle sheath.
  • the etching process is universally applicable to a variety of different arrangements of different filaments.
  • the free ends of a plurality of filaments preferably arranged regularly and spaced from one another, can also be exposed. This ultimately allows even the cost-effective and chemical production of slots that can be used to hold media.
  • the production of bristles with split, consisting of several individual filaments, use-side end on a chemical and therefore cost-effective way is possible.
  • the bristle ends are rounded or rounded after the etching process by means of grinding.
  • the bristles are fixed before the etching process on a bristle carrier provided for the bristles, in particular on a toothbrush head.
  • the bristles are already in front of the processing of the bristle end etching and grinding process at its predetermined position on the brush head and no longer need to be attached to the etching of this, which would be associated with a much higher cost, since the tapered at their ends formed bristles should be treated with greater care.
  • fixation of the bristles on the bristle head prior to processing of the bristle ends in particular enables a simplified production of complicated Taftgeometrien of bristles on the bristle carrier.
  • the invention therefore relates to bristles of any kind, but in particular to toothbrushes with a bristle carrier, on which the multi-filament and tapered bristles according to the invention are arranged.
  • the bristle 1 is a bristle 1, which is not part of the invention, in particular the bristle of a toothbrush shown schematically in cross section.
  • the bristle 1 here consists of two filaments 2, 3 different material, which are extruded, stretched and fixed together.
  • the one filament 2 forms an inner core of the bristle 1, while the other filament 3 surrounds the inner filament 2 as a sheath.
  • the inner filament is made of polyamide, such as nylon, while the outer filament 3 is polyester.
  • the originally cylindrical shell 3 is removed material selectively, while the resistant to the chemical bristle core 2 compared to its (not shown) basic state unchanged Geometry preserves.
  • the polyester filament 3 forming the bristle jacket is etched away by immersion in the chemical such that the jacket 3 of the bristle, before reaching the free end of the bristle, tapers conically with a cross-sectional area which steadily decreases toward the bristle end.
  • this material-selective etching process has the advantage that the inner core 2 of the bristle is in no way damaged by the etching process. This still has a required flexural rigidity and can be easily sharpened or rounded mechanically in subsequent process steps. Furthermore, it is ensured on account of the material-selective etching of the bristle end that a predetermined minimum thickness of the bristle end can not be undershot, so that the risk of breaking or uncontrolled breaking off is reliably counteracted.
  • FIG. 3 shows a further example of a multi-filament bristle 4.
  • filaments 6 which consist of the same material, regularly and spaced apart, arranged distributed over the cross section of the bristle 4.
  • the spaces between the filaments 6 are filled with the filament 5, which is removed by the chemical used in the etching process.
  • the filament 5 can also be completely removed at the free end of the bristle, so that the individual filaments 6 remain with a smaller diameter, which are suitable for receiving material in the filament interspaces as well as for penetration into the smallest interdental spaces.
  • FIG. 4 shows an embodiment of a bristle 7, which has radially symmetrically arranged segments of different filaments 8, 9 in cross section.
  • all filaments 8, 9 extend from the bristle center to the bristle edge.
  • FIG. 5 shows a further embodiment of a bristle end, in which individual filaments 12 are arranged of a material adjacent to the bristle periphery and spaced from each other, while the other filament 11 fills the core region of the bristle.
  • the filament 11 is partially removed by the etching process, so that the individual bristle filaments 12 are at least partially exposed and thus form a spread-open end of the bristle 10.
  • FIG. 1 shows a schematic side view of a further bristle end 13, which has different filaments 14, 15, which are preferably detached from one another by means of a chemical etching process and thus form a fanned-out bristle end.
  • the filaments 14, 15 consisting of different materials are replaced by means of a further, not explicitly shown filament, such as for example in the manner of in FIG. 5 shown filaments 11, are first held together, which is finally removed in the etching process, so that ultimately in the FIG. 6 shown fan-like structure at the end of the bristle arises.

Landscapes

  • Brushes (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Multicomponent Fibers (AREA)
EP07703053.4A 2006-03-16 2007-01-26 Mehrfilamentige borsten für zahnbürsten Active EP1993399B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006012004A DE102006012004A1 (de) 2006-03-16 2006-03-16 Mehrfilamentige Borsten für Zahnbürsten
PCT/EP2007/000664 WO2007104381A1 (de) 2006-03-16 2007-01-26 Mehrfilamentige borsten für zahnbürsten

Publications (2)

Publication Number Publication Date
EP1993399A1 EP1993399A1 (de) 2008-11-26
EP1993399B1 true EP1993399B1 (de) 2018-09-26

Family

ID=38134639

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07703053.4A Active EP1993399B1 (de) 2006-03-16 2007-01-26 Mehrfilamentige borsten für zahnbürsten

Country Status (13)

Country Link
US (1) US20090094770A1 (enExample)
EP (1) EP1993399B1 (enExample)
JP (1) JP2009529612A (enExample)
KR (1) KR20090006067A (enExample)
CN (1) CN101404912A (enExample)
AU (1) AU2007224819A1 (enExample)
BR (1) BRPI0709398A2 (enExample)
CA (1) CA2645152A1 (enExample)
DE (1) DE102006012004A1 (enExample)
MX (1) MX2008011496A (enExample)
RU (1) RU2008140938A (enExample)
WO (1) WO2007104381A1 (enExample)
ZA (1) ZA200807199B (enExample)

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012000148A (ja) * 2010-06-14 2012-01-05 Panasonic Electric Works Co Ltd ブラシ体およびこれを備えた歯ブラシ
US20150150366A1 (en) * 2012-06-05 2015-06-04 Lg Household & Healthcare Ltd. Toothbrush bristles having tip with double structure and toothbrush comprising same
KR101385623B1 (ko) * 2012-08-17 2014-04-16 케이필라 주식회사 코어-시스 필라멘트의 제조방법, 제조된 칫솔모 제조용 모노필라멘트 및 그를 포함하는 칫솔
CN104902785B (zh) * 2012-10-04 2017-03-22 Bbc有限公司 牙刷毛的制造方法及利用该牙刷毛的牙刷
BR112016012422B1 (pt) 2013-12-12 2021-11-03 Colgate-Palmolive Company Cerda de múltiplos componentes que tem componentes com diferentes aditivos para cuidado oral e implemento para cuidado oral que compreende os mesmos
US10477958B2 (en) 2013-12-12 2019-11-19 Colgate-Palmolive Company Multi-component bristle having components with different oral care additives, and oral care implement comprising the same
CN105792701B (zh) 2013-12-12 2018-03-02 高露洁-棕榄公司 具有带有不同的口腔护理添加剂的股线部件的螺旋刷毛以及包括该螺旋刷毛的口腔护理器具
USD764177S1 (en) 2014-07-31 2016-08-23 Colgate-Palmolive Company Oral care implement
USD764176S1 (en) 2014-07-31 2016-08-23 Colgate-Palmolive Company Oral care implement
US10702057B2 (en) 2015-07-07 2020-07-07 Colgate-Palmolive Company Oral care implement and monofilament bristle for use with the same
BR112018011445A2 (pt) 2015-12-14 2018-11-27 Colgate Palmolive Co instrumento para higiene bucal e cerdas em espiral para uso com o mesmo
GB201600846D0 (en) * 2016-01-18 2016-03-02 Glaxosmithkline Consumer Healt Novel device
JPWO2017130901A1 (ja) * 2016-01-25 2018-11-15 東レ・モノフィラメント株式会社 ブラシ用毛材及びそれを用いたブラシ
KR101874948B1 (ko) * 2016-03-09 2018-07-10 비비씨 주식회사 이중 구조의 필라멘트
US20180199701A1 (en) * 2017-01-16 2018-07-19 L'oreal Usa Creative, Inc. Cosmetic brush head including anti-aging ingredients
ES3027651T3 (en) * 2017-03-31 2025-06-16 Gillette Co Llc Head for an oral care implement, oral care implement and method for manufacturing such head
ES3029487T3 (en) * 2017-03-31 2025-06-24 Gillette Co Llc Head for an oral care implement, oral care implement and method for manufacturing such head
ES3028878T3 (en) * 2017-03-31 2025-06-20 Gillette Co Llc Head for an oral care implement, oral care implement and method for manufacturing such head
EP3381320B1 (en) * 2017-03-31 2025-03-19 The Gillette Company LLC Head for an oral care implement, oral implement and method for manufacturing such head
USD883677S1 (en) 2018-12-13 2020-05-12 Colgate-Palmolive Company Toothbrush
CA3119552A1 (en) 2018-12-13 2020-06-18 Colgate-Palmolive Company Oral care implement
CN113194785A (zh) 2018-12-13 2021-07-30 高露洁-棕榄公司 口腔护理器具
USD961269S1 (en) 2020-07-31 2022-08-23 Colgate-Palmolive Company Oral care implement
USD1024571S1 (en) 2022-06-17 2024-04-30 Colgate-Palmolive Company Oral care implement
USD1024572S1 (en) 2022-06-24 2024-04-30 Colgate-Palmolive Company Oral care implement
EP4575052A1 (en) * 2023-12-21 2025-06-25 GEKA GmbH Multi-strand filament

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Publication number Priority date Publication date Assignee Title
JP2003339440A (ja) * 2002-05-30 2003-12-02 Lion Corp ブラシおよびその製造方法
JP2005253712A (ja) * 2004-03-12 2005-09-22 Toray Monofilament Co Ltd 電動歯ブラシ用ブリッスルおよび電動歯ブラシ
WO2006082799A1 (ja) * 2005-02-02 2006-08-10 Sunstar Inc. 歯ブラシ

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DE3400941A1 (de) * 1983-01-14 1984-10-11 Coronet - Werke Heinrich Schlerf Gmbh, 6948 Wald-Michelbach Kunststoffborste
DE19932376A1 (de) * 1999-07-13 2001-01-18 Coronet Werke Gmbh Borste für Zahnbürsten und Zahnbürste mit solchen Borsten
DE19942147A1 (de) * 1999-09-03 2001-03-08 Trisa Holding Ag Triengen Einzelborste aus Kunststoff für eine Bürste, insbesondere eine Zahnbürste sowie ein Verfahren zur Herstellung einer Einzelborste

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003339440A (ja) * 2002-05-30 2003-12-02 Lion Corp ブラシおよびその製造方法
JP2005253712A (ja) * 2004-03-12 2005-09-22 Toray Monofilament Co Ltd 電動歯ブラシ用ブリッスルおよび電動歯ブラシ
WO2006082799A1 (ja) * 2005-02-02 2006-08-10 Sunstar Inc. 歯ブラシ
EP1844677A1 (en) * 2005-02-02 2007-10-17 Sunstar Inc. Toothbrush

Also Published As

Publication number Publication date
JP2009529612A (ja) 2009-08-20
BRPI0709398A2 (pt) 2011-07-05
WO2007104381A1 (de) 2007-09-20
MX2008011496A (es) 2008-09-22
ZA200807199B (en) 2009-05-27
EP1993399A1 (de) 2008-11-26
RU2008140938A (ru) 2010-04-27
CN101404912A (zh) 2009-04-08
US20090094770A1 (en) 2009-04-16
CA2645152A1 (en) 2007-09-20
DE102006012004A1 (de) 2007-09-20
KR20090006067A (ko) 2009-01-14
AU2007224819A1 (en) 2007-09-20

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