EP2146600B1 - Poils de brosse à dents avec une partie rétrécie et brosse à dents munie de tels poils - Google Patents

Poils de brosse à dents avec une partie rétrécie et brosse à dents munie de tels poils Download PDF

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Publication number
EP2146600B1
EP2146600B1 EP08733833.1A EP08733833A EP2146600B1 EP 2146600 B1 EP2146600 B1 EP 2146600B1 EP 08733833 A EP08733833 A EP 08733833A EP 2146600 B1 EP2146600 B1 EP 2146600B1
Authority
EP
European Patent Office
Prior art keywords
bristle
bristles
tapered
diameter
tapered part
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.)
Not-in-force
Application number
EP08733833.1A
Other languages
German (de)
English (en)
Other versions
EP2146600A1 (fr
Inventor
André BRUNELLA
Christine Garbers
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.)
Gaba International Holding AG
Original Assignee
Gaba International Holding AG
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 Gaba International Holding AG filed Critical Gaba International Holding AG
Publication of EP2146600A1 publication Critical patent/EP2146600A1/fr
Application granted granted Critical
Publication of EP2146600B1 publication Critical patent/EP2146600B1/fr
Not-in-force 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
    • A46D1/04—Preparing bristles
    • 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
    • A46D1/0276—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
    • A46D1/0284—Bristles having rounded 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
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B3/00—Brushes characterised by the way in which the bristles are fixed or joined in or on the brush body or carrier
    • A46B3/16—Brushes characterised by the way in which the bristles are fixed or joined in or on the brush body or carrier by wires or other anchoring means, specially for U-shaped bristle tufts

Definitions

  • the present invention relates to a toothbrush bristle with a tapered portion and a toothbrush containing such bristles.
  • the present application has the object to provide an improved bristle with a tapered portion.
  • the novel bristles have a longer life than the prior art tapered bristles:
  • the pointed ends bend according to the findings of the applicant under the Tooth brushing occurring contact pressures, which leads over time to a fatigue breakage of the bristle tip; This is avoided by the invention merely tapered (not pointed) bristle ends.
  • the bristles according to the invention are so mechanically stable that they show on the buccal tooth surfaces a cleaning performance which is comparable or even slightly superior to cylindrical bristles.
  • the bristles according to the invention are also more suitable for cleaning interdental spaces and approximal tooth surfaces than bristles with non-tapered filament ends, since the bristles according to the invention can better reach approximal tooth surfaces.
  • D is in the range of 100 to 130 microns, more preferably in the range of 100 to 125 microns.
  • the first tapered part of the bristle has a diameter of 120 to 160 ⁇ m in a distance of 1 mm measured from the piercing point on the center axis and a diameter of 90 to 135 ⁇ m in a distance of 0.1 mm measured in the same way on.
  • the bristle according to the invention is substantially (or as far as technically possible) rotationally symmetrical about the central axis.
  • the profile line of the tapered portion of the bristle (ie, the diameter of the tapered portion as a function of the decreasing distance from the piercing point of the centerline of the bristle through the face) is preferably monotonically decreasing toward the face.
  • the term "monotonously decreasing" in the context of the present application has the usual meaning in mathematics. Rather preferred is the profile line of Tapered part in the mathematical sense to the point of penetration strictly monotone decreasing.
  • the length of the tapered part (or, in the case of a U-shaped bent bristle according to the invention with two tapered parts, the length of both tapered parts) is in the range of 6 to 10 mm.
  • the end face of the end of the first tapered part has a surface normal at said piercing point, which is preferably inclined no more than about 30 ° C towards said center line. This is usually the case automatically when the end face is formed by trimming a pointed end (see below); it may also be effected by suitable rounding treatment of the end face and its edges adjacent to the lateral surface of the tapered part (see below).
  • any edges between the end face and the tapered part can be removed by rounding, as is customary in the case of cylindrical bristles.
  • the rounding can be carried out by conventional methods, e.g. B. using a sandpaper.
  • Particularly preferred profile lines of the first tapered part are approximately in accordance with the following profile tables 1 to 4.
  • the diameters are given as a function of the distance from the piercing point of the center line through the end face (averages with scattering from 6 copies of the bristle).
  • the extreme right column of each table gives the maximum diameter of the cylindrical part (D zyl ) of the bristle.
  • the diameter at the end face and at a small distance from the end face can no longer be reasonably measured. This is the case when the bristle end of the tapered part has been subjected to a subsequent rounding. This fillet may eventually form irregularly rugged shapes and uneven surfaces at the end of the bristle, making direct measurement of the diameter near the face impossible. It has now surprisingly also been found in the bristles according to the invention that in these cases the diameter close to or at the end face can be approximated by extrapolation by means of a parabola, wherein for the parabola the diameters of the bristles are in the distances of 1, 2 and 3 mm are taken from the front surface as support points.
  • the bristles according to the invention consist of a plastic suitable for toothbrush bristles.
  • they may preferably be made of a polyester, in particular one Polyester obtainable from (C 2 -C 4 ) -1, ⁇ -alkylene glycol and terephthalic acid.
  • the polyester is polyethylene terephthalate (PET) or polybutylene terephthalate (PBT), and particularly preferred is PBT.
  • polyamides may consist of a polyamide, in particular a polyamide obtainable from a (C 2 -C 8 ) -1, ⁇ -diamine and from a (C 2 -C 8 ) -1, ⁇ -dicarboxylic acid; Particularly preferred here is polyamide-6,6 (eg nylon).
  • bristles For the production of bristles according to the invention, it can be assumed that commercially available bristles, which are tapered on one or two sides, or cylindrical bristles.
  • bristles for example, Pragma, Shinyoung, Whessen, Hylon, Sogo, Best Whasung or Cheil Jedang were manufacturers of such bristles.
  • Bristles according to the invention which have exactly one first tapered end, can be obtained, for example, from a commercially available unilaterally tapered bristle by trimming the pointed end while simultaneously forming the tapered end and the end face.
  • the other, cylindrical end of the bristle may be cut to size.
  • Bristles of the invention having a second tapered portion adjacent the first tapered portion may typically be formed from commercially available cylindrical bristles of suitable length by chemically etching the ends to the appropriate tapered or tapered shape. This etching process has been in the field of tapered bristles since long known.
  • the tapered end may also be trimmed here to set a useful overall length of the bristle.
  • two-sided sharpened bristles are commercially available, which need only be suitably trimmed at both ends to obtain a bristle according to the invention with two tapered parts and a length suitable for toothbrushes (see Example 1).
  • the bristles can first be trimmed to a uniform length. Thereafter, they can be etched vertically immersed in an etching liquid of typically 80 to 150 ° C.
  • etching liquids are inorganic solutions, for example a strongly alkaline etching solution (for example a 25-50% strength by weight aqueous NaOH or KOH solution) or a strongly acidic etching solution (for example 60-98% strength by weight aqueous sulfuric acid solution).
  • etching liquids are also organic solvents such as m-cresol, trifluoroacetic acid, o-chlorophenol, trichlorophenol, DMSO, DMF, and a mixture of phenol and tetrachloroethane.
  • the duration of the immersion may typically be 10 to 20 minutes, with the bristles being optional during this Time can be gradually withdrawn from the etchant at a freely selectable, constant or time varying rate, whereby the profile of the etched end (ie, the monotony of the profile line) can be influenced.
  • the ends may be washed with water, dilute base, dilute acid or a suitable solvent at room temperature and dried.
  • the conditions of the etching can be chosen such that the diameter D of the tapered part after etching is just in the range of 100 to 140 ⁇ m according to the invention.
  • the etching is carried out in a shorter period of time than for the etching of the previously known sharpened bristles.
  • the conditions of the etching may be selected to initially form a tapered end, which is then trimmed to obtain the end face and the tapered part.
  • the ends of the bristles may be trimmed additionally before the ends are rounded. Whether the ends need to be trimmed can be determined simply by observing the condition of the ends with an enlarger after they have been removed from the solution.
  • the invention also provides a toothbrush with bristles according to the present invention.
  • the novel bristles can be used analogously to the previously known one or two-sided sharpened bristles in the bristle carrier of a toothbrush.
  • Bristles according to the invention with two tapered parts or with a tapered part and a sharpened part are in this case preferably bent in a U-shape and inserted in the bristle carrier by means of anchor plates.
  • bristles according to the invention with only just one tapered part and one cylindrical part are preferably inserted into the bristle carrier in unconverted form by means of the method known in the jargon as "Anchor-Free Tufting".
  • Example 1 Production of bristles with two identical tapered parts according to the above profile tables 1 to 4
  • Each of the initial bursts was trimmed at the two peaks in intervals as indicated above in the middle column.
  • the ends of the thus-obtained tapered portions of the bristles were rounded using a TR89 Bristle Rounding Machine (manufactured by Tsujimura Co., Japan) with 240 mesh emery paper.
  • FIG. 1 shows an end with tapered portion of a bristle according to the invention.
  • the cylindrical part (1) On the right, the cylindrical part (1) is indicated, whose constant diameter at the same time means the maximum diameter D zyl of the bristle.
  • the cylindrical part (1) is adjoined by a tapered part (21), the taper of which begins at a distance L from the piercing point (6) of the central axis (5) through the end face (4) and decreases strictly monotonously to the end ( 3) extends.
  • the end face (4) of the end (3) is shown here after an idealized rounding, that is formed approximately hemispherical; due to trimming and subsequent real rounding, this face could also be rather flat, but with more or less irregular or rugged edges.
  • the diameter D essential to the invention is measured at a distance X from the piercing point (6), the distance X being equal to the said maximum diameter of the cylindrical part, D cyl .
  • FIGS. 2 and 3 show three inventive bristles.
  • the bristle is shown bent in a U shape, like the bristles in particular of FIGS. 2 and 3 in the bristle face of a toothbrush would be planted. The bend is done in the cylindrical part (1) which is then bent itself U-shaped.
  • a bristle according to the invention with two tapered parts (21, 22) is shown; in figure 3 a bristle according to the invention is shown with a first tapered part (21) and a pointed end (7); and in FIG. 4 a bristle according to the invention is shown with only just a tapered part (21), the remainder of the bristle being formed by a cylindrical part (1).
  • This latter bristle could, unlike in FIG. 3 shown, even in non-bent form in the bristle carrier of a toothbrush head are used.
  • the standardized brushing operation consisted of 60 reciprocating movements with an amplitude of 30 mm; during vertical cleaning (in the figures the hatched parts of the beams) it consisted of 60 movements up and down with an amplitude of 8 mm; and in the circular cleaning (in the figures the dotted parts of the beams) it consisted of 60 circles of radius 4 mm with simultaneous 16 horizontal reciprocating movements with amplitude of 30 mm.
  • the measured cleaning powers ie the proportion of removed TiO 2 , are given in arbitrary units.
  • FIG. 5 shows the sum of the average values of the cleaning performance after horizontal, vertical and circular cleaning movements with the bristles according to the invention (bar A) and with the conventional cylindrical bristles (bar B) in the case of the buccal tooth surfaces.
  • FIG. 6 shows the sum of the average values of the cleaning performance after horizontal, vertical and circular cleaning movements with the bristles according to the invention (bar A) and with the conventional cylindrical bristles (bar B) in the mesial / distal tooth surfaces, ie in the tooth surfaces facing the interdental spaces.
  • FIG. 5 It can be seen that the inventive bristles despite lower mechanical strength in horizontal and vertical cleaning movements on buccal Tooth surfaces are slightly superior to conventional bristles.
  • FIG. 6 It can be seen that the bristles according to the invention are clearly superior to the conventional bristles, especially in the horizontal and vertical brushing movement on mesial / distal tooth surfaces.

Landscapes

  • Brushes (AREA)

Claims (10)

  1. Poil pour une brosse à dents, comprenant :
    a) une partie cylindrique (1) ayant un diamètre de cylindre maximal constant Dzyl;
    b) une première partie effilée (21) succédant à la partie cylindrique (1), comportant une extrémité de poil (3) et une surface frontale (4) terminant l'extrémité de poil (3), la première partie effilée (21) s'effilant dans la direction de l'extrémité de poil (3) ; et
    c) un axe médian (5) imaginaire passant par la partie cylindrique (1) et la première partie effilée (21), qui perce la surface frontale (4) à un point de percée (6) ;
    la première partie effilée (21) présentant une longueur L de 10 mm ou moins et d'au moins 6 mm mesurée sur l'axe médian (5) et à partir du point de percée (6) ;
    caractérisé en ce que la première partie effilée (21) présente un diamètre D de 95 à 140 µm à une distance X mesurée sur l'axe médian (5) à partir du point de percée (6), qui est égale au diamètre de cylindre Dzyl.
  2. Poil selon la revendication 1, caractérisé en ce que D se situe dans la plage de 100 à 130 µm, de préférence de 100 à 125 µm.
  3. Poil selon l'une des revendications 1 ou 2, caractérisé en ce que la première partie effilée (21) présente un diamètre de 120 à 160 µm à une distance de 1 mm mesurée sur l'axe médian (5) à partir du point de percée (6) et un diamètre de 90 à 135 µm à une distance de 0,1 mm mesurée de la même manière.
  4. Poil selon l'une des revendications 1 à 3, caractérisé en ce qu'il présente une deuxième partie effilée (22) qui succède à la partie cylindrique (1) du côté opposé à la première partie effilée (21).
  5. Poil selon la revendication 4, caractérisé en ce que la deuxième partie effilée (22) présente sensiblement la même forme que la première partie effilée (21).
  6. Poil selon l'une des revendications 1 à 3, caractérisé en ce qu'il présente une extrémité pointue (7) qui succède à la partie cylindrique (1) du côté opposé à la première partie effilée (21).
  7. Poil selon l'une des revendications 1 à 6, caractérisé en ce que Dzyl se situe dans la plage de 150 à 170 µm ou dans la plage de 180 à 210 µm.
  8. Poil selon l'une des revendications 1 à 7, constitué d'un polyester ou d'un polyamide.
  9. Poil selon l'une des revendications 1 à 8, constitué de polyéthylène téréphtalate, de polybutylène téréphtalate ou de polyamide-6.6.
  10. Brosse à dents comprenant un ou plusieurs poils selon l'une des revendications 1 à 9.
EP08733833.1A 2007-05-14 2008-05-08 Poils de brosse à dents avec une partie rétrécie et brosse à dents munie de tels poils Not-in-force EP2146600B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH7812007 2007-05-14
PCT/CH2008/000212 WO2008138158A1 (fr) 2007-05-14 2008-05-08 Poils de brosse à dents avec une partie rétrécie et brosse à dents munie de tels poils

Publications (2)

Publication Number Publication Date
EP2146600A1 EP2146600A1 (fr) 2010-01-27
EP2146600B1 true EP2146600B1 (fr) 2016-10-12

Family

ID=38529452

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08733833.1A Not-in-force EP2146600B1 (fr) 2007-05-14 2008-05-08 Poils de brosse à dents avec une partie rétrécie et brosse à dents munie de tels poils

Country Status (13)

Country Link
US (1) US20100154154A1 (fr)
EP (1) EP2146600B1 (fr)
KR (1) KR101217311B1 (fr)
CN (1) CN101742943B (fr)
AU (1) AU2008250913B2 (fr)
BR (1) BRPI0811598A2 (fr)
CA (1) CA2687350C (fr)
CO (1) CO6251218A2 (fr)
IL (1) IL202146A (fr)
MX (1) MX2009012412A (fr)
MY (1) MY157768A (fr)
RU (1) RU2430668C2 (fr)
WO (1) WO2008138158A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011105083A1 (de) 2011-06-21 2012-12-27 Jovica Vukosavljevic Chemisch-mechanisches Verfahren zur Herstellung komplexer Borstenprofile
USD754443S1 (en) 2014-06-11 2016-04-26 Colgate-Palmolive Company Oral care implement
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
USD815838S1 (en) * 2016-07-15 2018-04-24 Colgate-Palmolive Company Toothbrush
USD883677S1 (en) 2018-12-13 2020-05-12 Colgate-Palmolive Company Toothbrush
AU2018452938B2 (en) 2018-12-13 2022-12-01 Colgate-Palmolive Company Oral care implement
US20200196744A1 (en) * 2018-12-20 2020-06-25 Sunstar Americas, Inc. Toothbrush bristle
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

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006158842A (ja) * 2004-12-10 2006-06-22 Sunstar Inc 歯ブラシ

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1042293C (zh) * 1992-06-22 1999-03-03 狮王株式会社 牙刷
KR100261658B1 (ko) * 1998-03-19 2000-07-15 권영준 테이퍼링형치솔의제조방법
KR200244827Y1 (ko) * 2001-05-24 2001-10-15 주식회사 베스트화성 탄력성이 우수한 고도 테이퍼링 칫솔모가 식모된 칫솔
CN2732059Y (zh) * 2004-10-16 2005-10-12 周武强 一种牙刷
US8042217B2 (en) * 2004-11-02 2011-10-25 Colgate-Palmolive Company Toothbrush and method of making the same
KR100666460B1 (ko) * 2005-04-08 2007-01-09 권영준 침상모가 식모된 칫솔의 제조방법 및 이 방법으로 제조된칫솔

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006158842A (ja) * 2004-12-10 2006-06-22 Sunstar Inc 歯ブラシ

Also Published As

Publication number Publication date
MX2009012412A (es) 2009-12-01
IL202146A (en) 2013-10-31
CO6251218A2 (es) 2011-02-21
RU2430668C2 (ru) 2011-10-10
CN101742943A (zh) 2010-06-16
AU2008250913A1 (en) 2008-11-20
CA2687350A1 (fr) 2008-11-20
RU2009146024A (ru) 2011-06-20
MY157768A (en) 2016-07-15
AU2008250913B2 (en) 2011-06-09
BRPI0811598A2 (pt) 2014-12-16
US20100154154A1 (en) 2010-06-24
IL202146A0 (en) 2010-06-16
CA2687350C (fr) 2012-10-02
CN101742943B (zh) 2012-09-05
WO2008138158A1 (fr) 2008-11-20
EP2146600A1 (fr) 2010-01-27
KR101217311B1 (ko) 2013-01-02
KR20100024413A (ko) 2010-03-05

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