EP2146600A1 - Toothbrush bristle with a tapering part and toothbrush with such bristles - Google Patents

Toothbrush bristle with a tapering part and toothbrush with such bristles

Info

Publication number
EP2146600A1
EP2146600A1 EP08733833A EP08733833A EP2146600A1 EP 2146600 A1 EP2146600 A1 EP 2146600A1 EP 08733833 A EP08733833 A EP 08733833A EP 08733833 A EP08733833 A EP 08733833A EP 2146600 A1 EP2146600 A1 EP 2146600A1
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.)
Granted
Application number
EP08733833A
Other languages
German (de)
French (fr)
Other versions
EP2146600B1 (en
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 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 AG filed Critical Gaba International AG
Publication of EP2146600A1 publication Critical patent/EP2146600A1/en
Application granted granted Critical
Publication of EP2146600B1 publication Critical patent/EP2146600B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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.
  • Korean Patent KR 261658 (corresponding to US-A-6090488) has described a toothbrush bristle having a tapered portion, the bristle having a diameter of 0.04 to 0.08 mm at the end of the tapered portion.
  • the tapered part of this bristle was no longer "pointed" in the above sense.
  • a bristle with a tapered part is described in which the diameter at the end of the tapered part is only 0.02 mm or less (this
  • the present application has the object of providing an improved bristle with a tapered portion.
  • a bristle for a toothbrush comprising: a) a cylindrical part with a maximum, constant cylinder diameter D zyl ; b) a first tapered part, adjoining the cylindrical part, with a bristle end and one of the ends
  • the first tapered part has a length L of 10 mm or less and at least 3 mm measured on the central axis and from the piercing point; characterized in that the first tapered part in a measured on the central axis from the piercing point ⁇ nem distance X, which is the same size as the cylinder diameter D 2y i, a diameter D of 95 to 140 microns.
  • the bristles according to the invention have a longer service life than the previously known sharpened bristles: according to the Applicant's findings, the sharpened ends buckle under the conditions described in US Pat Brushing occurring pressure, which leads in the course of time to a fatigue fracture 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 proximal tooth surfaces than bristles with non-tapered filament ends, since the bristles according to the invention are better able to 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 erfmdungsgemasse bristle is substantially (or as far as technically possible) rotationally symmetric about the central axis.
  • the profile line of the tapered part of the bristle ie the diameter of the tapered part as a function of the decreasing distance from the piercing point of the center line of the bristle through the end 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 recessed parts, the length of both tapered parts) is preferably in the range of 6 to 10 mm.
  • the end face of the end of the first tapered part has, at said piercing point, a surface normal, 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).
  • a bristle having a cylindrical portion to which exactly one substantially rotationally symmetrical tapered portion of 10 mm or less in length adjoins (i.e., analogous to the unilaterally tapered bristle);
  • a bristle having a cylindrical part and exactly two tapered, substantially rotationally symmetric parts, each 10 mm or less in length, which adjoin the cylindrical part on opposite sides (ie analogous to the double-pointed bristle), in particular the two tapered parts in essence are the same, and
  • a bristle having a cylindrical portion, a substantially rotationally symmetrical tapered portion of 10 mm or less in length, and a substantially rotational symmetric tapered end, the tapered portion and tapered portion joining the cylindrical portion on opposite sides.
  • any edges between the end face and the recessed part can be removed by rounding, as is the case with cylindrical bristles.
  • the rounding can be carried out by conventional methods, e.g. B. using a sandpaper.
  • Particularly preferred profile dimensions of the first tapered part are approximately according to the following profile tables I to 4.
  • the diameters are given as a function of the distance from the point of penetration of the center line through the end face (mean values with scattering from 6 pieces of bristle each).
  • the extreme right column of each table gives the maximum diameter of the cylindrical part (D zy i) of the bristle.
  • diameter values are also indicated at a distance of 0.1 mm from the end face in order to exemplify the preferred course of the first tapered part of the bristle in the vicinity of the end face according to the invention.
  • 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 of a subsequent
  • the erfmdungsgemassen bristles consist of a for
  • Toothbrush bristles suitable plastic may preferably be made of a polyester, in particular one Polyester which is obtainable from (C 2 -C 4) -1, ⁇ -alkylene glycol and from terephthalic acid. More preferably, the polyester is polyethylene terephthalate (PET) or polybutylene terephthalate (PBT), and particularly preferred is PBT.
  • PBT polyethylene terephthalate
  • PBT polybutylene terephthalate
  • they may consist of a polyamide, in particular of a polyamide obtainable from a (C 2 -Cs) -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 accordingly.
  • 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 can also be trimmed here to set a useful total length of 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 Atzpoundmaschine of typically 80 to 150 0 C.
  • etching liquids are inorganic solutions, for example a strongly alkaline solution of atzalt (for example a 25-50% strength by weight aqueous NaOH or KOH solution) or a strongly acidic atz solution (eg 60-98%)
  • etchant examples include organic solvents such as m-cresol, trifluoroacetic acid, o-chlorophenol, T ⁇ chlorphenol, DMSO, DMF, and a mixture of phenol and tetrachloroethane.
  • the duration of the immersion may typically be 10 to 20 minutes, with the bristles optionally being able to be gradually withdrawn from the breath at a freely selectable, constant or time varying rate during this time, thereby increasing the profile of the end (ie monotony) of the breath Profllline) 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. For this purpose, the etching in a shorter
  • the conditions of the etching can be selected such that a sharpened end first results, which is then trimmed to obtain the end face and the recessed 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 a magnifier after they have been removed from the solution.
  • the invention also provides a toothbrush with bristles according to the present invention.
  • the bristles according to the invention can be inserted into the bristle carrier of a toothbrush analogously to the previously known one- or two-sided sharpened bristles.
  • 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 process known in the jargon as "Anchor-Free Tufting".
  • FIG. 1 shows a cross-section through a bristle according to the invention, wherein also the measuring parameters essential to the invention are indicated;
  • FIGS. 2, 3 and 4 show three embodiments of the bristles according to the invention.
  • FIGS. 5 and 6 show in vitro cleaning performance tests on black-colored, then TiC 2 -coated teeth with conventional cylindrical bristles according to the invention.
  • 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 a tapered part 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 zy i of the bristle.
  • the Cylind ⁇ step part (1) includes a tapered portion (21), whose taper at a distance L from the piercing point (6) of the central axis (5) by the end face (4) and extending strictly decreasing until 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 zy i.
  • FIGS. 2-4 show three bristles according to the invention.
  • the bristle is shown bent in a U-shape, just as the bristles in particular of FIGS. 2 and 3 would be planted in the bristle face of a toothbrush.
  • the Um ⁇ bend takes place in the cylindrical part (1) which is then bent itself U-shaped.
  • FIG. 2 shows a bristle according to the invention with two tapered parts (21, 22); in figure Figure 3 shows a bristle according to the invention with a first tapered part (21) and a pointed end (7); and Figure 4 is an inventive bristle is shown with only just ei ⁇ nem verjungten part (21), with the remainder of the bristle of a cylindrical part (1) is formed.
  • This latter bristle could, unlike shown in Figure 3, are used in non-bent form in the bristle carrier of a toothbrush head.
  • Figures 5 and 6 show tests for cleaning performance obtained in vitro on black-colored, then TiO ⁇ - coated teeth. Tested were:
  • 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 indicated in arbitrary units.
  • FIG. 5 shows the sum of the mean values of the cleaning powers 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 cleaning powers after horizontal, vertical and circular brushing movements with the bristles according to the invention (bar A) and with the conventional cylindrical bristles (bar B) in the mesial / distal tooth surfaces, i. at the tooth spaces facing tooth spaces.

Abstract

Bristle for a toothbrush, comprising a) a cylindrical part (1) with a maximum, constant cylinder diameter Dzyi and b) a tapered part (2) which adjoins the cylindrical part (1) and has a bristle end (3) and has an end face (4) which completes the bristle end (3), wherein the tapered part (2) tapers towards the bristle end (3); wherein the tapered part (2) has a length L of 10 mm or less and at least 3 mm; characterized in that the tapered part (2), at a distance X from the end face (4), which distance is the same size as the cylinder diameter Dzyl, has a diameter D of 95 to 140 μm, and a toothbrush with such bristles.

Description

Zahnburstenborste mit verjüngtem Teil und Zahnbürste mit solchen Borsten Toothbrush bristle with tapered part and toothbrush with such bristles
Die vorliegende Erfindung betrifft eine Zahnburstenborste mit verjüngtem Teil sowie eine Zahnbürste, die solche Borsten enthalt.The present invention relates to a toothbrush bristle with a tapered portion and a toothbrush containing such bristles.
Klassische für Zahnbürsten geeignete Borsten wiesen einen zylindrischen Querschnitt auf. Da solche Borsten eine ungenügende Reimgungsleistung im Interndentalraum aufwiesen und dazu neigten, das Zahnfleisch zu verletzen, ging man in den 90er Jahren des vorigen Jahrhunderts teilweise dazu über, die Borsten mit einem zugespitzten Ende zu versehen (siehe z.B. EP-A-O 596 633). Durch den geringeren Querschnitt am zugespitzten Ende verbesserte sich die Reimgungsleistung im Interdentalraum; gleichzeitig wurde die Borste dadurch fle- xibler, was das Verletzungsrisiko verringerte. Andererseits nahm die Reimgungsleistung auf den Zahnflachen ab.Classic bristles suitable for toothbrushes had a cylindrical cross-section. Since such bristles had insufficient internal vaginal rinsing performance and tended to injure the gums, in the 90's of the last century, some of the bristles were given a tapered end (see, e.g., EP-A-0 596 633). Due to the smaller cross-section at the pointed end, the rhyming performance in the interdental space improved; at the same time, the bristle became more flexible, which reduced the risk of injury. On the other hand, the rhyming performance decreased on the tooth surfaces.
In dem koreanischen Patent KR 261658 (entspricht US-A- 6090488) wurde eine Zahnburstenborste mit einem verjungten Teil beschrieben, wobei die Borste am Ende des verjungten Teils einen Durchmesser von 0,04 bis 0,08 mm aufweist. Das verjungte Teil dieser Borste war also nicht mehr im vorstehenden Sinne "zugespitzt". In der spateren EP-A-I 234 525 desselben Erfinders wird dann aber eine Borste mit einem verjungten Teil beschrieben, bei der der Durchmesser am Ende des verjungten Teils nur noch 0,02 mm oder weniger ist (dieseKorean Patent KR 261658 (corresponding to US-A-6090488) has described a toothbrush bristle having a tapered portion, the bristle having a diameter of 0.04 to 0.08 mm at the end of the tapered portion. The tapered part of this bristle was no longer "pointed" in the above sense. In the later EP-A-1 234 525 of the same inventor, however, a bristle with a tapered part is described in which the diameter at the end of the tapered part is only 0.02 mm or less (this
Borste ähnelt also eher wieder den zugespitzten Borsten etwa gemass EP-A-O 596 633) . Zur Begründung dafür, dass er den Durchmesser am Ende der Borste wieder verkleinert hat, gibt der Erfinder an, dass die Entfernung von Zahnstein aus Perio- dontaltaschen mit den Borsten von KR 261658 schwierig sei.So bristle is more like the tapered bristles again according to EP-AO 596 633). In support of the fact that he has reduced the diameter at the end of the bristle again, there The inventors state that the removal of tartar from periodontal pockets with the bristles of KR 261658 is difficult.
Die vorliegende Anmeldung hat die Aufgabe, eine verbesserte Borste mit verjüngtem Teil bereitzustellen.The present application has the object of providing an improved bristle with a tapered portion.
Die Aufgabe wird erfindungsgemass gelost durch eine Borste für eine Zahnbürste, umfassend: a) Einen zylindrischen Teil mit einem maximalen, konstanten Zylinderdurchmesser Dzyl; b) einen sich an den zylindrischen Teil anschliessenden, ers- ten verjungten Teil mit einem Borstenende und mit einer dasThe object is achieved according to the invention by a bristle for a toothbrush, comprising: a) a cylindrical part with a maximum, constant cylinder diameter D zyl ; b) a first tapered part, adjoining the cylindrical part, with a bristle end and one of the ends
Borstenende abschliessenden Stirnflache, wobei sich der erste verjungte Teil zum Borstenende hin verjungt; und c) eine durch den zylindrischen Teil und den ersten verjung¬ ten Teil verlaufende gedachte Mittelachse, die die Stirnfla- che an einem Durchstosspunkt durchstosst; wobei der erste verjungte Teil eine auf der Mittelachse und ab dem Durchstosspunkt gemessene Lange L von 10 mm oder weniger und mindestens 3 mm aufweist; dadurch gekennzeichnet, dass der erste verjungte Teil in ei- nem auf der Mittelachse von dem Durchstosspunkt aus gemesse¬ nem Abstand X, der gleich gross ist wie der Zylinderdurchmesser D2yi, einen Durchmesser D von 95 bis 140 μm aufweist.Bristling final face, with the first tapered portion tapering towards the bristle end; and c) a durchstosst extending through the cylindrical portion and the first verjung ¬ th imaginary central axis which the surface Stirnfla- at a piercing point; wherein the first tapered part has a length L of 10 mm or less and at least 3 mm measured on the central axis and from the piercing point; characterized in that the first tapered part in a measured on the central axis from the piercing point ¬ nem distance X, which is the same size as the cylinder diameter D 2y i, a diameter D of 95 to 140 microns.
Bevorzugte Ausfuhrungsformen ergeben sich aus den ab¬ hangigen Ansprüchen.Preferred embodiments are evident from the from ¬ hangigen claims.
Es wurde überraschenderweise gefunden, dass die erfin- dungsgemassen Borsten eine grossere Lebensdauer haben als die vorbekannten zugespitzten Borsten: Die zugespitzten Enden knicken nach dem Befund der Anmelderin unter den beim Zähneputzen auftretenden Anpressdrucken ein, was im Laufe der Zeit zu einem Ermudungsbruch der Borstenspitze fuhrt; dies wird durch die erfindungsgemass lediglich verjungten (nicht zugespitzten) Borstenenden vermieden. Gleichzeitig wurde ge- funden, dass die erfmdungsgemassen Borsten mechanisch so stabil sind, dass sie auf den bukkalen Zahnflachen eine den zylindrischen Borsten vergleichbare oder sogar leicht überlegene Reinigungsleistung zeigen. Die erfmdungsgemassen Borsten eignen sich zudem besser zum Reinigen von Interdentalraumen und approximalen Zahnflachen als Borsten mit nicht verjungten Filamentenden, da die erfmdungsgemassen Borsten approximale Zahnflachen besser erreichen können.It has surprisingly been found that the bristles according to the invention have a longer service life than the previously known sharpened bristles: according to the Applicant's findings, the sharpened ends buckle under the conditions described in US Pat Brushing occurring pressure, which leads in the course of time to a fatigue fracture of the bristle tip; This is avoided by the invention merely tapered (not pointed) bristle ends. At the same time, it has been found that 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 proximal tooth surfaces than bristles with non-tapered filament ends, since the bristles according to the invention are better able to reach approximal tooth surfaces.
Bevorzugt ist D im Bereich von 100 bis 130 μm, eher bevorzugt im Bereich von 100 bis 125 μm. Ebenfalls bevorzugt weist der erste verjungte Teil der Borste in einem auf der Mittelachse von dem Durchstosspunkt aus gemessenen Abstand von 1 mm einen Durchmesser von 120 bis 160 μm und in einem auf dieselbe Weise gemessenen Abstand von 0,1 mm einen Durchmesser von 90 bis 135 μm auf.Preferably, D is in the range of 100 to 130 microns, more preferably in the range of 100 to 125 microns. Also preferably, the first tapered part of the bristle has a diameter of 120 to 160 μm in a distance of 1 mm measured from the piercing point on the center axis and a diameter of 90 to 135 μm in a distance of 0.1 mm measured in the same way on.
Die erfmdungsgemasse Borste ist im Wesentlichen (oder soweit technisch möglich) rotationssymmetrisch um die Mittelachse .The erfmdungsgemasse bristle is substantially (or as far as technically possible) rotationally symmetric about the central axis.
Die Profillinie des verjungten Teils der Borste (d.h. den Durchmesser des verjungten Teils als Funktion des abneh- menden Abstandes vom Durchstosspunkt der Mittellinie der Borste durch die Stirnflache) verlauft bevorzugt monoton fallend zur Stirnflache hm. Der Begriff "monoton fallend" hat im Rahmen der vorliegenden Anmeldung die in der Mathematik übliche Bedeutung. Eher bevorzugt ist die Profilline des verjüngten Teils im mathematischen Sinn zum Durchstosspunkt hin streng monoton fallend.The profile line of the tapered part of the bristle (ie the diameter of the tapered part as a function of the decreasing distance from the piercing point of the center line of the bristle through the end face) preferably runs monotone falling to the end face hm. 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.
Die Länge des verjüngten Teils (oder, im Falle einer U-förmig umgebogenen erfindungsgemässen Borste mit zwei ver- jungten Teilen, die Länge beider verjüngten Teile) ist bevorzugt im Bereich von 6 bis 10 mm.The length of the tapered part (or, in the case of a U-shaped bent bristle according to the invention with two recessed parts, the length of both tapered parts) is preferably in the range of 6 to 10 mm.
Die Stirnfläche des Endes des ersten verjüngten Teils weist an dem besagten Durchstosspunkt eine Flächennormale auf, die bevorzugt nicht mehr als etwa 300C gegen die besagte Mittellinie geneigt ist. Dies ist in der Regel dann automatisch der Fall, wenn die Stirnfläche durch Trimmen eines zugespitzten Endes gebildet ist (siehe unten) ; es kann auch durch geeignete, verrundende Behandlung der Stirnfläche und ihrer an die Mantelfläche des verjüngten Teils angrenzenden Kanten bewirkt werden (siehe unten) .The end face of the end of the first tapered part has, at said piercing point, a surface normal, 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).
Drei besonders bevorzugte Typen von erfindungsgemässen Borsten sind wie folgt:Three particularly preferred types of bristles according to the invention are as follows:
i) eine Borste mit einem zylindrischen Teil, an den sich genau ein im wesentlichen rotationssymmetrischer ver- jüngter Teil von 10 mm oder weniger Länge anschliesst (d.h. analog zur einseitig zugespitzten Borste) ;i) a bristle having a cylindrical portion to which exactly one substantially rotationally symmetrical tapered portion of 10 mm or less in length adjoins (i.e., analogous to the unilaterally tapered bristle);
ii) eine Borste mit einem zylindrischen Teil und genau zwei verjüngten, im Wesentlichen rotationssymmetrischen Teilen von je von 10 mm oder weniger Länge, die sich an entge- gengesetzten Seiten an den zylindrischen Teil anschliessen (d.h. analog zur zweiseitig zugespitzten Borste), insbesondere, wobei die beiden verjüngten Teile im Wesentlichen gleich ausgebildet sind, undii) a bristle having a cylindrical part and exactly two tapered, substantially rotationally symmetric parts, each 10 mm or less in length, which adjoin the cylindrical part on opposite sides (ie analogous to the double-pointed bristle), in particular the two tapered parts in essence are the same, and
111) eine Borste mit einem zylindrischen Teil, einem im Wesentlichen rotationssymmetrischen verjungten Teil von 10 mm oder weniger Lange und einem im Wesentlichen rotations- symmetrischen zugespitzten Ende, wobei verjüngter Teil und zugespitzter Teil sich an entgegengesetzten Seiten an den zylindrischen Teil anschliessen .111) comprises a bristle having a cylindrical portion, a substantially rotationally symmetrical tapered portion of 10 mm or less in length, and a substantially rotational symmetric tapered end, the tapered portion and tapered portion joining the cylindrical portion on opposite sides.
Bei allen Ausfuhrungsformen der erfindungsgemassen Borste können allfallige Kanten zwischen Stirnflache und ver- jungtem Teil durch Verrunden entfernt werden, wie es bei den zylindrischen Borsten fachublich ist. Das Runden kann mittels üblicher bekannte Methoden ausgeführt werden, z. B. unter Verwendung eines Schmirgelpapieres .In all embodiments of the bristle according to the invention, any edges between the end face and the recessed part can be removed by rounding, as is the case with cylindrical bristles. The rounding can be carried out by conventional methods, e.g. B. using a sandpaper.
Besonders bevorzugte Profillimen des ersten verjung- ten Teils sind etwa gemass den folgenden Profiltabellen I bis 4. Angegeben sind die Durchmesser in Abhängigkeit vom Abstand vom Durchstosspunkt der Mittellinie durch die Stirnflache (Mittelwerte mit Streuung aus je 6 Exemplaren der Borste) . In der aussersten rechten Spalte jeder Tabelle ist der maximale Durchmesser des zylindrischen Teils (Dzyi) der Borste angegeben. Entsprechend der erfindungsgemassen Messdefinition für den Durchmesser D des ersten verjungten Teils ist in jeder Tabelle auch bei einem Abstand X = Dzyi der zugehörige Durchmesserwert angegeben. Des Weiteren sind in den Profiltabellen 1 bis 4 auch im Abstand von 0,1 mm von der Stirnflache Durchmesserwerte angegeben, um den erfindungsgemass bevorzugten Verlauf des ersten verjungten Teils der Borste in der Nahe der Stirnflache zu exemplifizieren. Profil 1Particularly preferred profile dimensions of the first tapered part are approximately according to the following profile tables I to 4. The diameters are given as a function of the distance from the point of penetration of the center line through the end face (mean values with scattering from 6 pieces of bristle each). The extreme right column of each table gives the maximum diameter of the cylindrical part (D zy i) of the bristle. According to the measurement definition according to the invention for the diameter D of the first tapered part, the associated diameter value is also indicated in each table even at a distance X = D zy i. Furthermore, in the profile tables 1 to 4, diameter values are also indicated at a distance of 0.1 mm from the end face in order to exemplify the preferred course of the first tapered part of the bristle in the vicinity of the end face according to the invention. Profile 1
Abstand vom zugespitzten ü ü. 1 ü, 202 1 2 3 4 b 6 7 8 9 10 Ende [mm]Distance from the pointed ü ü. 1 ü, 202 1 2 3 4 b 6 7 8 9 10 End [mm]
Durchmesser [mm] 0, 107 0, 113 0, 117 0, 147 0, 172 0, 183 0, 190 0, 195 0, 197 0, 199 0, 201 0, 203 0, 202 (0 , 108)Diameter [mm] 0, 107 0, 113 0, 117 0, 147 0, 172 0, 183 0, 190 0, 195 0, 197 0, 199 0, 201 0, 203 0, 202 (0, 108)
Durchmesserbereich [+/- mm] 0, 012 0, 019 0, 021 0, 020 0, 019 0, 014 0, 014 0, 014 0, 012 0, 011 0, 010Diameter range [+/- mm] 0, 012 0, 019 0, 021 0, 020 0, 019 0, 014 0, 014 0, 014 0, 012 0, 011 0, 010
Profil 2Profile 2
Abstand vom 0 0, 1 0, 209 1 2 3 4 5 6 7 8 9 10 11 zugespitzten Ende [mm]Distance from 0 0, 1 0, 209 1 2 3 4 5 6 7 8 9 10 11 pointed end [mm]
Durchmesser [mm] 0, 086 0, 095 0, 101 0, 140 0 ,172 0 ,185 0, 192 0, 198 0, 201 0, 204 0, 205 0, 205 0, 208 0, 209 (0 ,089)Diameter [mm] 0, 086 0, 095 0, 101 0, 140 0, 172 0, 185 0, 192 0, 198 0, 201 0, 204 0, 205 0, 205 0, 208 0, 209 (0, 089 )
Durchmesserbereich [+/- mm] 0, 012 0, 018 0 , 021 0 ,018 0, 015 0, 013 0, 010 0, 009 0, 008 0, 008 0, 007 0, 006Diameter range [+/- mm] 0, 012 0, 018 0, 021 0, 018 0, 015 0, 013 0, 010 0, 009 0, 008 0, 008 0, 007 0, 006
Profil 3Profile 3
Abstand vom 0 0, 1 0, 209 1 2 3 4 5 6 7 8 9 10 zugespitzten Ende [mm]Distance from 0 0, 1 0, 209 1 2 3 4 5 6 7 8 9 10 pointed end [mm]
Durchmesser [mm] 0, 096 0, 101 0, 104 0, 127 0, 151 0, 170 0, 183 0, 191 0, 199 0, 202 0, 206 0, 208 0, 209 (0 ,098)Diameter [mm] 0, 096 0, 101 0, 104 0, 127 0, 151 0, 170 0, 183 0, 191 0, 199 0, 202 0, 206 0, 208 0, 209 (0, 098)
Durchmesserbereich [ +/- mm] 0, 009 0, 009 0, 009 0, 008 0, 007 0, 006 0, 008 0, 005 0, 006 0, 005 0, 003 IDiameter range [+/- mm] 0, 009 0, 009 0, 009 0, 008 0, 007 0, 006 0, 008 0, 005 0, 006 0, 005 0, 003 I
Profil 4Profile 4
Abstand vom 0 0, 1 0, 166 1 2 3 4 5 6 7 8 9 10 zugespitzten Ende [mm]Distance from 0 0, 1 0, 166 1 2 3 4 5 6 7 8 9 10 pointed end [mm]
Durchmesser [mm] 0, 112 0, 119 0, 122 0, 137 0, 150 0, 156 0, 159 0, 162 0, 163 0, 164 0, 165 0, 165 0, 166 (0 ,117)Diameter [mm] 0, 112 0, 119 0, 122 0, 137 0, 150 0, 156 0, 159 0, 162 0, 163 0, 164 0, 165 0, 165 0, 166 (0, 117)
Durchmesserbereich 0, 010 0, 011 0, 009 0, 009 0, 008 0, 008 0, 007 0, 007 0, 007 0, 007 0, 007 [+/- mm] Diameter range 0, 010 0, 011 0, 009 0, 009 0, 008 0, 008 0, 007 0, 007 0, 007 0, 007 0, 007 [+/- mm]
Es kann vorkommen, dass bei einigen Ausfuhrungsformen der erfmdungsgemassen Borste der Durchmesser an der Stirnflache und in geringem Abstand von der Stirnflache nicht mehr vernunftig gemessen werden kann. Dies ist dann der Fall, wenn das Borstenende des verjüngten Teils einer nachträglichenIt may happen that in some embodiments of the bristle according to the invention 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 of a subsequent
Verrundung unterzogen wurde. Diese Verrundung kann unter Umstanden am Ende der Borste unregelmassig zerklüftete Formen und unebene Flachen ausbilden, was die direkte Messung des Durchmessers nahe bei der Stirnflache verunmoglicht . Es wurde nun bei den erfmdungsgemassen Borsten überraschenderweise auch gefunden, dass sich in diesen Fallen der Durchmesser nahe bei oder an der Stirnflache durch Extrapolation mittels einer Parabel approximiert bestimmen lasst, wobei für die Parabel die Durchmesser der Borste in den Abstanden von 1, 2 und 3 mm von der Stirnflache als Stutzstellen genommen werden. Diese Stutzstellen sind m den obigen Tabellen fett angegeben. Zum Nachweis, dass dies funktioniert, sind in den obigen Profiltabellen beim Abstand 0 von der Stirnflache sowohl die ursprünglichen, tatsächlich gemessenen Durchmesser der Borste (wie sie nach dem Trimmen des Endes, aber vor der Verrundung waren) als auch darunter, in Klammern, die mittels dieser Extrapolation bestimmten Durchmesser angegeben. Die Abweichung zwischen tatsachlichem Durchmesser und durch Extrapolation bestimmtem Durchmesser ist minim. Eine so einfache Extrapolation ist bei den erfmdungsgemassen Borsten deswegen möglich, weil die Krümmung des verjüngten Teils weniger ausgeprägt ist als bei den vorbekannten Borsten.Rounding was subjected. This rounding may form irregularly rugged shapes and uneven surfaces at the end of the bristle, making the direct measurement of the diameter close to the end face impossible. Surprisingly, it has now 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, the diameter of the bristle being in the distances of 1, 2 and 3 for the parabola mm are taken from the front surface as support sites. These bottoms are given in bold in the tables above. In the above profile tables, at the distance 0 from the face, both the original, actually measured diameters of the bristle (as they were after trimming the end but before rounding) and below, in brackets, are to prove that this works given by this extrapolation certain diameter. The deviation between the actual diameter and the diameter determined by extrapolation is minimal. Such a simple extrapolation is possible with the inventive bristles because the curvature of the tapered part is less pronounced than in the previously known bristles.
Die erfmdungsgemassen Borsten bestehen aus einem fürThe erfmdungsgemassen bristles consist of a for
Zahnburstenborsten geeigneten Kunststoff. Sie können einer- seits bevorzugt aus einem Polyester, insbesondere aus einem Polyester, der aus (C2-C4) -1, ω-Alkylenglycol und aus Te- rephthalsäure erhältlich ist, bestehen. Eher bevorzugt ist der Polyester Polyethylenterepthtalat (PET) oder Polybutylen- terephthalat (PBT), und besonders bevorzugt ist PBT. Anderer- seits können sie aus einem Polyamid bestehen, insbesondere aus einem Polyamid, das aus einem (C2-Cs) -1 , ω-Diamin und aus einer (C2-C8) -1 , ω-Dicarbonsäure erhältlich ist; besonders bevorzugt ist hier Polyamid-6,6 (z.B. Nylon) .Toothbrush bristles suitable plastic. On the one hand, they may preferably be made of a polyester, in particular one Polyester which is obtainable from (C 2 -C 4) -1, ω-alkylene glycol and from terephthalic acid. More preferably, the polyester is polyethylene terephthalate (PET) or polybutylene terephthalate (PBT), and particularly preferred is PBT. On the other hand, they may consist of a polyamide, in particular of a polyamide obtainable from a (C 2 -Cs) -1, ω-diamine and from a (C 2 -C 8 ) -1, ω-dicarboxylic acid; Particularly preferred here is polyamide-6,6 (eg nylon).
Für die Herstellung der erfindungsgemässen Borsten kann von handelsüblichen einseitig oder zweiseitig zugespitzten Borsten oder von zylindrischen Borsten ausgegangen werden. Zum Anmeldezeitpunkt der vorliegenden Anmeldung waren etwa Pragma, Shinyoung, Wessen, Hylon, Sogo, Best Whasung oder Cheil Jedang Hersteller solcher Borsten.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. At the filing date of the present application, for example, Pragma, Shinyoung, Whessen, Hylon, Sogo, Best Whasung or Cheil Jedang were manufacturers of such bristles.
Erfindungsgemässe Borsten, die genau ein erstes verjüngtes Ende aufweisen, können etwa aus einer handelsüblichen einseitig zugespitzten Borste durch Trimmen des zugespitzten Endes, unter gleichzeitiger Ausbildung des verjüngten Endes und der Stirnfläche, erhalten werden. Damit die Borste insge- samt eine für Zahnbürstenborsten geeignete Länge hat, kann das andere, zylindrische Ende der Borste entsprechend zugeschnitten werden.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. In order for the bristle to have a total length suitable for toothbrush bristles, the other, cylindrical end of the bristle may be cut to size accordingly.
Erfindungsgemässe Borsten, die neben dem ersten verjüngten Teil einen zweiten verjüngten Teil oder einen zuge- spitzten Teil aufweisen, können in der Regel aus handelsüblichen zylindrischen Borsten von geeigneter Länge hergestellt werden, indem die Enden durch chemisches Ätzen auf die geeignete verjüngte oder zugespitzte Form gebracht werden. Dieses Ätzverfahren ist auf dem Gebiet der zugespitzten Borsten seit langem bekannt. Hier kann ebenfalls optional das verjungte Ende noch getrimmt werden, zum Einstellen einer brauchbaren Gesamtlange der Borste.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. Optionally, the tapered end can also be trimmed here to set a useful total length of bristle.
Andererseits sind im Handel zweiseitig zugespitze Borsten erhältlich, die nur gerade an den beiden Enden geeignet getrimmt werden müssen, um zu einer erfmdungsgemassen Borste mit zwei verjüngten Teilen und mit einer für Zahnbürsten geeigneten Lange zu erhalten (siehe Beispiel 1) .On the other hand, 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).
Beim chemischen Atzverfahren können die Borsten zu- nächst auf eine einheitlich Lange getrimmt werden. Danach können sie senkrecht in eine Atzflussigkeit von typisch 80 bis 1500C eingetaucht geatzt werden. Beispiele für Atzflus- sigkeiten sind anorganische Losungen, etwa eine stark alkalische Atzlosung (z.B. eine 25-50 Gew%-ige wasserige NaOH- oder KOH-Losung) oder eine stark saure Atzlosung (z.B. 60 - 98In the chemical etching process, the bristles can first be trimmed to a uniform length. Thereafter, they can be etched vertically immersed in an Atzflussigkeit of typically 80 to 150 0 C. Examples of etching liquids are inorganic solutions, for example a strongly alkaline solution of atzalt (for example a 25-50% strength by weight aqueous NaOH or KOH solution) or a strongly acidic atz solution (eg 60-98%)
Gew%-ige wasserige Schwefelsaurelosung) . Beispiele für Atz- flussigkeiten sind auch organische Losungsmittel wie etwa m- Kresol, Trifluoressigsaure, o-Chlorphenol, Tπchlorphenol, DMSO, DMF, und ein Gemisch aus Phenol und Tetrachlorethan . Die Dauer des Eintauchens kann typisch 10 bis 20 Minuten betragen, wobei die Borsten gewunschtenfalls wahrend dieser Zeit mit einer frei wahlbaren, konstanten oder zeitlich variierenden Geschwindigkeit allmählich aus der Atzflussigkeit herausgezogen werden können, wodurch das Profil des abgeatz- ten Endes (d.h. die Monotonie der Proflllinie) beeinflusst werden kann. Nach dem Atzen können die Enden je nach Art der Atzlosung mit Wasser, verdünnter Base, verdünnter Saure oder einem geeigneten Losungsmittel bei typisch Raumtemperatur gewaschen und getrocknet werden. Die Bedingungen des Ätzens (Art und Temperatur der Ätzflüssigkeit, Dauer des Eintauchens) können einerseits so gewählt werden, dass der Durchmesser D des verjüngten Teils nach dem Ätzen gerade im erfindungsgemässen Bereich von 100 bis 140 μm liegt. Hierzu wird das Ätzen in einer kürzeren% By weight aqueous sulfuric acid solution). Examples of etchant are also organic solvents such as m-cresol, trifluoroacetic acid, o-chlorophenol, Tπchlorphenol, DMSO, DMF, and a mixture of phenol and tetrachloroethane. The duration of the immersion may typically be 10 to 20 minutes, with the bristles optionally being able to be gradually withdrawn from the breath at a freely selectable, constant or time varying rate during this time, thereby increasing the profile of the end (ie monotony) of the breath Proflllinie) can be influenced. After etching, depending on the nature of the batch, the ends may be washed with water, dilute base, dilute acid or a suitable solvent at room temperature and dried. On the one hand, the conditions of the etching (type and temperature of the etching liquid, duration of immersion) can be chosen such that the diameter D of the tapered part after etching is just in the range of 100 to 140 μm according to the invention. For this purpose, the etching in a shorter
Zeitdauer durchgeführt als für das Ätzen der vorbekannten zugespitzten Borsten. Andernfalls können die Bedingungen des Ätzens so gewählt werden, dass zunächst ein zugespitztes Ende entsteht, das dann unter Erhalt der Stirnfläche und des ver- jungten Teils getrimmt wird.Duration of time than for the etching of the previously known sharpened bristles. Otherwise, the conditions of the etching can be selected such that a sharpened end first results, which is then trimmed to obtain the end face and the recessed part.
Wenn es gewünscht wird, können die Enden der Borsten, nachdem sie in einer alkalischen oder sauren Lösung geätzt wurden, zusätzlich getrimmt werden, bevor die Enden gerundet werden. Ob die Enden getrimmt werden müssen, kann einfach durch Beobachtung des Zustandes der Enden mit einem Vergrös- serungsgerät bestimmt werden, nachdem sie aus der Lösung genommen wurden.If desired, after being etched in an alkaline or acidic solution, 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 a magnifier after they have been removed from the solution.
Gegenstand der Erfindung ist auch eine Zahnbürste mit Borsten gemäss der vorliegenden Erfindung. Die erfindungsge- mässen Borsten lassen sich analog zu den vorbekannten ein- oder zweiseitig zugespitzten Borsten in den Borstenträger einer Zahnbürste einsetzen. Erfindungsgemässe Borsten mit zwei verjüngten Teilen oder mit einem verjüngten Teil und einem zugespitzten Teil werden dabei bevorzugt U-förmig umgebogen mittels Ankerplättchen in dem Borstenträger eingesetzt. Er- findungsgemässe Borsten mit nur gerade einem verjüngten Teil und einem zylindrischen Teil werden dagegen bevorzugt in nicht umgebogener Form mittels des in der Fachsprache als "AFT-Verfahren" (Anchor-Free Tufting) bekannten Verfahrens in den Borstenträger eingesetzt. Die Erfindung wird nun unter Bezug auf die Beispiele und Figuren weiter veranschaulicht, wobei in den FigurenThe invention also provides a toothbrush with bristles according to the present invention. The bristles according to the invention can be inserted into the bristle carrier of a toothbrush analogously to the previously known one- or two-sided sharpened bristles. 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. In contrast, 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 process known in the jargon as "Anchor-Free Tufting". The invention will now be further illustrated with reference to the examples and figures, wherein in FIGS
- Fig. 1 einen Querschnitt durch eine erfindungsgemässe Borste zeigt, wobei auch die erfindungswesentlichen Messpara- meter angegeben sind;FIG. 1 shows a cross-section through a bristle according to the invention, wherein also the measuring parameters essential to the invention are indicated; FIG.
- Fig. 2, 3 und 4 drei Ausführungsformen der erfindungsgemäs- sen Borste zeigen; undFIGS. 2, 3 and 4 show three embodiments of the bristles according to the invention; and
- Fig. 5 und 6 Tests auf in vitro-Reinigungsleistung bei schwarzgefärbten, dann TiC^-beschichteten Zähnen mit er- findungsgemässen und herkömmlichen zylindrischen Borsten zeigen .FIGS. 5 and 6 show in vitro cleaning performance tests on black-colored, then TiC 2 -coated teeth with conventional cylindrical bristles according to the invention.
Beispiel 1: Herstellung von Borsten mit zwei gleichen verjüngten Teilen gemäss den obigen Profiltabellen 1 bis 4Example 1: Production of bristles with two identical tapered parts according to the above profile tables 1 to 4
Es wurde von vier handelsüblichen zweiseitig zugespit- zen Borsten ausgegangen, die wie folgt waren:Four commercially available double-sided bristles were used, which were as follows:
Jede der Ausgangsborsten wurde an den beiden Spitzen in den Abständen wie obiger Tabelle in der mittleren Spalte angegeben getrimmt. Die Enden der so erhaltenen verjüngten Teile der Borsten wurden gerundet, wobei eine TR89 Bristle Rounding Machine (hergestellt von Tsujimura Co., Japan) mit einem Schmirgelpapier von 240 Mesh verwendet wurde. 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.
Figur 1 zeigt ein Ende mit verjüngtem Teil einer er- findungsgemässen Borste. Rechts ist der zylindrische Teil (1) angedeutet, dessen konstanter Durchmesser gleichzeitig den maximalen Durchmesser Dzyi der Borste bedeutet. An den zylind¬ rischen Teil (1) schliesst sich ein verjüngter Teil (21) an, dessen Verjüngung in einem Abstand L von dem Durchstosspunkt (6) der Mittelachse (5) durch die Stirnfläche (4) beginnt und sich streng monoton fallend bis zum Ende (3) erstreckt. Die Stirnfläche (4) des Endes (3) ist hier nach einer idealisierten Verrundung gezeigt, d.h. in etwa halbkugelförmig ausgebildet; infolge Trimmen und anschliessender realer Verrundung könnte diese Stirnfläche auch eher plan, aber mit mehr oder weniger unregelmässigen oder zerklüfteten Kanten sein. Ge- zeigt ist auch, dass der erfindungsgemäss wesentliche Durchmesser D in einem Abstand X von dem Durchstosspunkt (6) gemessen wird, wobei der Abstand X gerade gleich dem besagten Maximaldurchmesser des Zylindrischen Teils, Dzyi, ist.FIG. 1 shows an end with a tapered part of a bristle according to the invention. On the right, the cylindrical part (1) is indicated, whose constant diameter at the same time means the maximum diameter D zy i of the bristle. At the Cylind ¬ step part (1) includes a tapered portion (21), whose taper at a distance L from the piercing point (6) of the central axis (5) by the end face (4) and extending strictly decreasing until 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. It is also shown that 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 zy i.
Figuren 2-4 zeigen drei erfindungsgemässe Borsten. Bei all diesen Figuren ist die Borste U-förmig umgebogen gezeigt, so wie die Borsten insbesondere von Figur 2 und 3 in der Borstenfläche einer Zahnbürste eingepflanzt würden. Die Um¬ biegung geschieht im zylindrischen Teil (1) der dann selber U-förmig umgebogen ist. In Figur 2 ist eine erfindungsgemässe Borste mit zwei verjüngten Teilen (21, 22) gezeigt; in Figur 3 ist eine erfindungsgemasse Borste mit einem ersten verjungten Teil (21) und einem zugespitzten Ende (7) gezeigt; und in Figur 4 ist eine erfindungsgemasse Borste mit nur gerade ei¬ nem verjungten Teil (21) gezeigt, wobei der Rest der Borste von einem zylindrischen Teil (1) gebildet ist. Diese letztere Borste konnte, anders als in Figur 3 gezeigt, auch in nicht umgebogener Form in den Borstentrager eines Zahnburstenkopfs eingesetzt werden.FIGS. 2-4 show three bristles according to the invention. In all of these figures, the bristle is shown bent in a U-shape, just as the bristles in particular of FIGS. 2 and 3 would be planted in the bristle face of a toothbrush. The Um ¬ bend takes place in the cylindrical part (1) which is then bent itself U-shaped. FIG. 2 shows a bristle according to the invention with two tapered parts (21, 22); in figure Figure 3 shows a bristle according to the invention with a first tapered part (21) and a pointed end (7); and Figure 4 is an inventive bristle is shown with only just ei ¬ nem verjungten part (21), with the remainder of the bristle of a cylindrical part (1) is formed. This latter bristle could, unlike shown in Figure 3, are used in non-bent form in the bristle carrier of a toothbrush head.
Figuren 5 und 6 zeigen Tests auf Reinigungsleistungen, die in vitro auf schwarzgefarbten, dann TiO∑-beschichteten Zahnen erzielt wurden. Getestet wurden:Figures 5 and 6 show tests for cleaning performance obtained in vitro on black-colored, then TiO Σ- coated teeth. Tested were:
(A) Bürsten mit erfindungsgemassen zweiseitig verjungten, ro- tationssymetnschen, U-formig umgebogen in die Bürste eingesetzten Borsten (siehe Figur 2) mit einer Borstenfeidhohe von 11,5 mm, mit einem maximalen(A) brushes with bristles according to the invention which have been bent on both sides, rooted in a U-shaped manner and bent into the brush (see FIG. 2) with a maximum bristle height of 11.5 mm
Durchmesser Dzyχ von etwa 0,21 mm und einem Durchmesser D von etwa 0,104 mm in einem Abstand X = Dzyi (diese Borsten entsprachen etwa dem vorstehend tabellarisch exemplifizierten Profil 3) ; und (B) Bürsten mit herkömmlichen zylindrischen, U-formig umgebogen in die Bürste eingesetzten Borsten mit Durchmesser Dzyi von 0,175 mm und einer Borstenfeldhohe von 11,5 mm. Bei diesen Tests wurden die Zahne eines Modells eines Oberkiefer-Sextanten (mit 3 Backenzahnen, 2 Vorbackenzahnen und 1 Eckzahn) zunächst schwarz eingefarbt und dann mit einer T1O2- Paste (25 g in 75 ml 26%igem Ethanol) weiss übertüncht. Nach einem standardisierten Burstvorgang mit dem zu testenden Borstenfeld von 1 min Dauer mit 250 g Auflagengewicht wurde der Anteil der Zahnflachen, der von der TiO2-Paste befreit worden war, bestimmt. Dieser Vorgang wird standardmassig für jedes zu testende Borstenfeld jeweils mit horizontalen, vertikalen und rotierenden Putzbewegungen durchgeführt und jeweils für jedes zu testende Borstenfeld und jede Putzbewegung viermal wiederholt. Bei der horizontalen Reinigung (in den Figuren die weissen Teile der Balken) bestand der standardisierte Bürstvorgang aus 60 Hin- und Herbewegungen mit einer Amplitude von 30 mm; bei der vertikalen Reinigung (in den Figuren die schraffierten Teile der Balken) bestand er aus 60 Auf- und Abwärtsbewegungen mit einer Amplitude von 8 mm; und bei der kreisförmigen Reinigung (in den Figuren die gepunkteten Teile der Balken) bestand er aus 60 Kreisen mit Radius von 4 mm bei gleichzeitigen 16 horizontalen Hin- und Herbewegungen mit Amplitude von 30 mm. In den Figuren 5 und 6 sind die gemessenen Reinigungsleistungen, d.h. der Anteil entferntes TiO2, in frei gewählten Einheiten ("arbitrary units") angegeben.Diameter D zy χ about 0.21 mm and a diameter D of about 0.104 mm at a distance X = D zy i (these bristles were about the above tabulated exemplified profile 3); and (B) brushes having conventional cylindrical bristles, U-shaped bent into the brush, with a diameter D zy of 0.175 mm and a bristle height of 11.5 mm. In these tests, the teeth of a model of a maxillary sextant (with 3 molars, 2 pre-cheeks and 1 canine) were first dyed black and then whitewashed with a T1O2 paste (25 g in 75 ml of 26% ethanol). After a standardized bursting process with the bristle field to be tested of 1 min duration with 250 g coating weight, the proportion of the tooth surfaces which had been freed from the TiO 2 paste was determined. This process is standard for each bristle field to be tested, each with horizontal, performed vertical and rotating brushing movements and repeated four times for each bristle field to be tested and each brushing movement. For horizontal cleaning (the white parts of the bars in the figures), 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. In FIGS. 5 and 6, the measured cleaning powers, ie the proportion of removed TiO 2 , are indicated in arbitrary units.
Figur 5 zeigt die Summe der Mittelwerte der Reinigungsleistungen nach horizontalen, vertikalen und kreisförmigen Putzbewegungen mit den erfindungsgemässen Borsten (Balken A) und mit den herkömmlichen zylindrischen Borsten (Balken B) bei den bukkalen Zahnflächen.FIG. 5 shows the sum of the mean values of the cleaning powers 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.
Figur 6 zeigt die Summe der Mittelwerte der Reinigungsleistungen nach horizontalen, vertikalen und kreisförmigen Putzbewegungen mit den erfindungsgemässen Borsten (Balken A) und mit den herkömmlichen zylindrischen Borsten (Balken B) bei den mesialen/distalen Zahnflächen, d.h. bei den den Zahnzwischenräumen zugewandten Zahnflächen.FIG. 6 shows the sum of the average cleaning powers after horizontal, vertical and circular brushing movements with the bristles according to the invention (bar A) and with the conventional cylindrical bristles (bar B) in the mesial / distal tooth surfaces, i. at the tooth spaces facing tooth spaces.
Aus Figur 5 ist ersichtlich, dass die erfindungsgemässen Borsten trotz geringerer mechanischen Festigkeit bei horizontalen und vertikalen Putzbewegungen auf bukkalen Zahnflächen den herkömmlichen Borsten leicht überlegen sind. Aus Figur 6 ist ersichtlich, dass die erfindungsgemässen Borsten insbesondere bei der horizontalen und vertikalen Putzbewegung auf mesialen/distalen Zahnflächen den herkömmlichen Borsten deutlich überlegen sind. From Figure 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. It can be seen from FIG. 6 that the bristles according to the invention are clearly superior to the conventional bristles, in particular in the horizontal and vertical brushing movement on mesial / distal tooth surfaces.

Claims

Patentansprüche claims
1. Borste für eine Zahnbürste, umfassend: a) Einen zylindrischen Teil (1) mit einem maximalen, konstanten Zylinderdurchmesser Dzyi; b) einen sich an den zylindrischen Teil (1) anschliessenden, ersten verjüngten Teil (21) mit einem Borstenende (3) und mit einer das Borstenende (3) abschliessenden Stirnfläche (4), wobei sich der erste verjüngte Teil (21) zum Borstenende (3) hin verjüngt; und c) eine durch den zylindrischen Teil (1) und den ersten verjüngten Teil (21) verlaufende gedachte Mittelachse (5), die die Stirnfläche (4) an einem Durchstosspunkt (6) durchstösst; wobei der erste verjüngte Teil (21) eine auf der Mittelachse (5) und ab dem Durchstosspunkt (6) gemessene Länge L von 10 mm oder weniger und mindestens 3 mm aufweist; dadurch gekennzeichnet, dass der erste verjüngte Teil (21) in einem auf der Mittelachse (5) von dem Durchstosspunkt (6) aus gemessenen Abstand X, der gleich gross ist wie der Zylinder¬ durchmesser Dzyl, einen Durchmesser D von 95 bis 140 μm auf- weist.A bristle for a toothbrush, comprising: a) a cylindrical member (1) having a maximum, constant cylinder diameter D zy i; b) a first tapered part (21) which adjoins the cylindrical part (1) and has a bristle end (3) and an end face (4) which terminates the bristle end (3), wherein the first tapered part (21) faces the bristle end (3) rejuvenated; and c) an imaginary central axis (5) passing through the cylindrical part (1) and the first tapered part (21) and piercing the end face (4) at a piercing point (6); wherein the first tapered part (21) has a length L of 10 mm or less and at least 3 mm measured on the center axis (5) and from the piercing point (6); characterized in that the first tapered part (21) in a measured on the central axis (5) from the piercing point (6) from distance X, which is the same size as the cylinder ¬ diameter D zyl , a diameter D of 95 to 140 microns having.
2. Borste nach Anspruch 1, dadurch gekennzeichnet, dass D im Bereich von 100 bis 130 μm, bevorzugt 100 bis 125 μm ist.2. Bristle according to claim 1, characterized in that D is in the range of 100 to 130 microns, preferably 100 to 125 microns.
3. Borste nach Anspruch 1 oder 2, dadurch gekennzeich- net, dass der erste verjüngte Teil (21) in einem auf der Mittelachse (5) von dem Durchstosspunkt (6) aus gemessenen Abstand von 1 mm einen Durchmesser von 120 bis 160 μm und in einem auf dieselbe Weise gemessenen Abstand von 0,1 mm einen Durchmesser von 90 bis 135 μm aufweist.3. bristle according to claim 1 or 2, characterized marked, that the first tapered part (21) in a on the central axis (5) from the piercing point (6) measured from a distance of 1 mm has a diameter of 120 to 160 microns and in a distance of 0.1 mm measured in the same way Diameter of 90 to 135 microns.
4. Borste nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass sie einen zweiten verjüngten Teil (22) aufweist, der sich auf der dem ersten verjüngten Teil (21) entgegengesetzten Seite an den zylindrischen Teil (1) an- schliesst .4. Bristle according to one of claims 1 to 3, characterized in that it comprises a second tapered part (22) which adjoins the cylindrical part (1) on the side opposite the first tapered part (21).
5. Borste nach Anspruch 4, dadurch gekennzeichnet, dass der zweite verjüngte Teil (22) im Wesentlichen die gleiche Form aufweist wie der erste verjüngte Teil (21) .5. Bristle according to claim 4, characterized in that the second tapered part (22) has substantially the same shape as the first tapered part (21).
6. Borste nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass sie ein zugespitztes Ende (7) aufweist, das sich auf der dem ersten verjüngten Teil (21) entgegengesetzten Seite an den zylindrischen Teil (1) anschliesst.A bristle according to any one of claims 1 to 3, characterized in that it has a tapered end (7) which adjoins the cylindrical part (1) on the side opposite the first tapered part (21).
7. Borste nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass Dzyi im Bereich von 150 bis 170 μm oder im Bereich von 180 bis 210 μm liegt.7. Bristle according to one of claims 1 to 6, characterized in that D zy i is in the range of 150 to 170 microns or in the range of 180 to 210 microns.
8. Borste nach einem der Ansprüche 1 bis 7, bestehend aus einem Polyester oder aus einem Polyamid.8. Bristle according to one of claims 1 to 7, consisting of a polyester or of a polyamide.
9. Borste nach einem der Ansprüche 1 bis 8, bestehend aus Polyethylenterephthalat, Polybutylenterephthalat oder Po¬ lyamid-6, 6.9. Bristle according to one of claims 1 to 8, consisting of polyethylene terephthalate, polybutylene terephthalate or Po ¬ lyamid-6, 6.
10. Zahnbürste umfassend eine oder mehrere Borsten nach einem der Ansprüche 1 bis 9. 10. Toothbrush comprising one or more bristles according to one of claims 1 to 9.
EP08733833.1A 2007-05-14 2008-05-08 Toothbrush bristle with a tapering part and toothbrush with such bristles Not-in-force EP2146600B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH7812007 2007-05-14
PCT/CH2008/000212 WO2008138158A1 (en) 2007-05-14 2008-05-08 Toothbrush bristle with a tapering part and toothbrush with such bristles

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EP2146600A1 true EP2146600A1 (en) 2010-01-27
EP2146600B1 EP2146600B1 (en) 2016-10-12

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KR (1) KR101217311B1 (en)
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AU (1) AU2008250913B2 (en)
BR (1) BRPI0811598A2 (en)
CA (1) CA2687350C (en)
CO (1) CO6251218A2 (en)
IL (1) IL202146A (en)
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MY (1) MY157768A (en)
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USD754443S1 (en) 2014-06-11 2016-04-26 Colgate-Palmolive Company Oral care implement
USD764176S1 (en) 2014-07-31 2016-08-23 Colgate-Palmolive Company Oral care implement
USD764177S1 (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
WO2020118602A1 (en) 2018-12-13 2020-06-18 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

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KR100261658B1 (en) * 1998-03-19 2000-07-15 권영준 Manufacturing method of tapered toothbrush
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MY157768A (en) 2016-07-15
KR20100024413A (en) 2010-03-05
AU2008250913B2 (en) 2011-06-09
US20100154154A1 (en) 2010-06-24
IL202146A (en) 2013-10-31
KR101217311B1 (en) 2013-01-02
IL202146A0 (en) 2010-06-16
WO2008138158A1 (en) 2008-11-20
CA2687350C (en) 2012-10-02
BRPI0811598A2 (en) 2014-12-16
CA2687350A1 (en) 2008-11-20
RU2430668C2 (en) 2011-10-10
MX2009012412A (en) 2009-12-01
CO6251218A2 (en) 2011-02-21
AU2008250913A1 (en) 2008-11-20
EP2146600B1 (en) 2016-10-12
RU2009146024A (en) 2011-06-20
CN101742943B (en) 2012-09-05
CN101742943A (en) 2010-06-16

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