CN101742943A - Toothbrush bristle and toothbrush with tapering part with this bristle - Google Patents

Toothbrush bristle and toothbrush with tapering part with this bristle Download PDF

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Publication number
CN101742943A
CN101742943A CN200880024757A CN200880024757A CN101742943A CN 101742943 A CN101742943 A CN 101742943A CN 200880024757 A CN200880024757 A CN 200880024757A CN 200880024757 A CN200880024757 A CN 200880024757A CN 101742943 A CN101742943 A CN 101742943A
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CN
China
Prior art keywords
bristle
tapering part
diameter
tapering
toothbrush
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Granted
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CN200880024757A
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Chinese (zh)
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CN101742943B (en
Inventor
A·布鲁内拉
C·加伯斯
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Gaba International Holding AG
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Gaba International AG
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    • 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

Abstract

Be used for the bristle of toothbrush, comprise: a) cylindrical part (1), this cylindrical part (1) have maximum constant diameter D most ZylAnd b) tapering part (2), this tapering part (2) adjacent cylindrical part (1), and have bristle ends (3) and have end face (4), described end face is finished bristle ends (3); Wherein tapering part (2) forms taper towards bristle ends (3); Wherein tapering part (2) has length L for being equal to or less than 10mm and 3mm at least; It is characterized in that tapering part (2) is the X place in the distance of distance end face (4), this distance X is and cylinder diameter D ZylIdentical size, having diameter is 95-140 μ m, and toothbrush has this bristle.

Description

Toothbrush bristle and toothbrush with tapering part with this bristle
The toothbrush that the present invention relates to have the toothbrush bristle of tapering part and comprise this bristle.
The common bristle that is applicable to toothbrush shows cylindrical cross section.Because these bristles have not enough clean-up performance in interdental space, and tend to injure gum, thus last century the nineties begin in some cases to provide and have most advanced and sophisticated bristle, (seeing for example EP-A-0596633).Because the diameter that reduces at the place, tip is so clean-up performance is improved in interdental space; Simultaneously, it is more soft that bristle becomes therefrom, reduced the danger of injury like this.On the other hand, the clean-up performance variation on dental surface.
In Korean Patent KR 261658 (corresponding to US-A-6090488), the toothbrush bristle with tapered end has been described, it is 0.04-0.08mm that bristle has diameter at the place, end of its tapering part.Therefore the tapering part of this bristle is not " point " now on above-mentioned meaning.Yet, among the patent EP-A-1234525 of same afterwards applicant's application, bristle with tapering part has been described, wherein only has been 0.02mm or littler (therefore this bristle also is similar to the bristle of the point of relevant EP-A-0596633) now at the place, end of tapering part diameter.As the reason that reduces diameter at place, the end of bristle again, the inventor thinks, it is very difficult to remove calculus with the bristle of KR 261658 from oral pocket.
The present invention manages to provide improved bristle with tapering part.
Above-mentioned purpose reaches by the bristle that is used for toothbrush according to the present invention, and this bristle comprises:
A) cylindrical part, this cylindrical part have maximum constant cylinder diameter D Zyl
B) first tapering part adjacent with cylindrical part, this first tapering part have bristle ends and limit the end face of bristle ends, thereby first tapering part forms taper towards the bristle ends direction; With
C) Xiang Xiang central axis, this central axis run through the cylindrical part and first tapering part, and pierce through end face at the puncture site place; Therefore to have length L be the littler and 3mm at least of 10mm to first tapering part, as beginning to record at central axis from puncture site;
It is characterized in that it is 95-140 μ m that first tapering part has diameter D, as equaling cylinder diameter D ZylThe distance X place start from from puncture site that central axis records.
Preferred embodiment can obtain from relevant claim.
Be surprisingly found out that, bristle of the present invention is compared with the prior art tip bristles, have the higher effective life-span: according to applicant's discovery, crooked under the effect of the compression stress that tapered end produces during brushing teeth, this bending causes the fatigue fracture of bristle tips at any time; This is to be avoided by only bristle ends of the present invention being formed taper (not pointing).Find that simultaneously bristle of the present invention mechanically is so stable, so that they have clean-up performance on the cheek flank of tooth, this clean-up performance is similar to or even is better than the clean-up performance of cylindrical bristle.In addition, bristle of the present invention is suitable for cleaning interdental space and contiguous facing better than the filament end with non-taper, because bristle of the present invention can better arrive contiguous facing.
Preferably, D is in the 100-130 mu m range, more preferably is in the 100-125 mu m range.In addition preferably, it is 120-165 μ m that first tapering part of bristle has diameter, record as begin to be in central axis from puncture site at distance 1mm, and being 90-135 μ m apart from the diameter for the 0.1mm place, as recording with same procedure.
Bristle of the present invention (or in feasible technically scope) basically has the shape around the rotary symmetry of central axis.
The outline line of the tapering part of bristle (that is along with the diameter from the puncture site of central axis to the ever-reduced variation tapering part of end face distance) is preferably by extending towards the dull mode that tilts of end face.Term " dull inclination " has common mathematical meaning in the application's text.More preferably, the outline line of tapering part strictly is the dullness inclination on the mathematical meaning.
The length of tapering part (perhaps curve U-shaped and have under the situation of two tapering parts at bristle of the present invention, the two length of two tapering parts) is preferably in the 6-10mm scope.
The end face of the end of first tapering part has a surface at above-mentioned puncture site place, and this normal to a surface preferably tilts to be not more than 30 ° with respect to central axis.If end face most advanced and sophisticated by repairing (seeing below this paper) forms, then this generally is automatically to finish; It also can carry out (seeing below this paper) by the suitable different round edge of handling the outer surface of end face and contiguous tapering part thereof.
Three kinds of particularly preferred bristle types of the present invention are as follows:
I) have the bristle of cylindrical part, be adjacent just in time be one basically the length of rotary symmetry be 10mm or shorter tapering part (that is this bristle is similar to only at one end goes up the bristle that forms taper);
Ii) have cylindrical part and two bristles of the tapering part of rotary symmetry basically just in time, these two tapering parts are contiguous cylindrical part on opposite side, each tapering part length be 10mm or shorter (that is, this bristle is similar to the bristle that two ends are points), especially therefore two tapering parts have substantially the same profile and
It is 10mm or shorter tapering part and the tip of rotary symmetry basically that the bristle that iii) has cylindrical part, this bristle have the length of rotary symmetry basically, thus tapering part and most advanced and sophisticated on opposite side contiguous cylindrical part.
In all embodiment of bristle of the present invention, the edge that may produce between end face and tapering part can be removed by rounding, as commonly used to cylindrical bristle.Rounding can be by common well-known method, for example by using sand paper to implement.
The particularly preferred outline line of first tapering part is according to following facial contour table 1-4 approx.These profile tables show the diameter (mean value has 6 standard deviations that sample obtains of every kind of bristle from these bristles) that the puncture site of accompanying or follow central axis is different to the distance of end face and become.In the right side of each table outermost one row, show the maximum gauge (D of the cylindrical part of bristle Zyl).Consistent with the measured deviation of the diameter of first tapering part of the present invention, each table is further illustrated in distance X=D ZylThe diameter value that the place is corresponding.Profile table 1-4 is further illustrated in apart from the diameter value of the distance of end face 0.1mm in addition, so that illustrate near the preferred profile of first tapering part end face.
Figure G2008800247577D00041
May take place occasionally, in some embodiment of bristle of the present invention, can not reasonably measure again in the end with apart from the diameter at end face small distance place.When the bristle ends of tapering part has stood rounding when handling subsequently, situation just like this.Thisly round processing and can produce irregular and zigzag shape and uneven surfaces at place, the end of bristle in some cases, this makes that directly to measure near the diameter of end face impossible.Bristle of the present invention is found now also pleasantly surprisedly, in these cases, near end face or the diameter of end can be approx determine by the parabola extrapolation, thereby be taken at apart from end face 1,2 and the diameter of the distance bristle of 3mm as the supporting-point of metaphor (parable).These supporting-points show with the black matrix numeral in above-mentioned table.In order to prove this work, above-mentioned table show the distance at the distance end face be the diameter of the zero originally actual bristle that records in place (as them after the finishing of end but before rounding processing) and below parenthetic by the definite diameter of above-mentioned extrapolation the two.Actual diameter and minimum by the deviation between the definite diameter of extrapolation.This simple extrapolation can be used for bristle of the present invention, and is not too remarkable because the curvature of tapered end is compared with the prior art bristle.
Bristle of the present invention is made of the plastics that are applicable to toothbrush bristle.On the one hand, they preferably can be polyester, especially from (C2-C4)-1, and ω-alkylene dihydroxylic alcohols ((C 2-C 4)-1, ω-alkyleneglycol) and the available polyester of terephthalic acids (terephthalic acid).More preferably, polyester is PET (PET) (polyethylene terephthalate (PET)) or polybutylene terephthalate (PBT) (PBT) (polybutylene terephthalate (PBT)), and particularly preferably is PBT.On the other hand, they can be polyamide, especially from (C 2-C 8)-1, ω-diamines ((C 2-C 8)-1, ω-diamine) and (C 2-C 8)-1, alpha, omega-dicarboxylic acid ((C 2-C 8)-1, ω-dicar-boxylic acid) available polyamide; Especially preferred herein is polyamide-6,6 (polyamide-6,6), for example nylon.
In order to produce bristle of the present invention, can from an end be point or two ends are commercially available bristles of point, perhaps from cylindrical bristle.When proposing to use immediately, the producer of these bristles is for example Pragma, Shinyoung, Wessen, Hylon, Sogo, Best Whasung or Cheil Jedang.
Bristle of the present invention has just what a first tapering part, and this bristle can for example obtain from commercially available bristle, and described commercially available bristle is sharp on an end only by repairing the tip, and forms tapered end and end face simultaneously.In order to make all bristles all have the length that is suitable for toothbrush bristle, another cylinder-shaped end of bristle can cut to certain size suitably.
Bristle of the present invention also has the part of second tapering part or point except first tapering part, the shape that this bristle generally can be by etching into end portion chemical suitable taper or point is by the cylindrical bristle preparation of commercially available appropriate length.This etching method is long-time well-known in pointing the field of bristle.Here tapered end also can randomly be repaired, so that reach the useful total length of bristle.
On the other hand, the bristle at two tips can have been bought on market, and it only need be repaired on two ends suitably, has two tapering parts and has the length (seeing example 1) that is suitable for toothbrush so that reach bristle of the present invention.
In chemical method for etching, bristle can at first be trimmed to the length of homogeneous.They can be etched by they vertically being inserted normally in 80-150 ℃ the etching solution then.The example of etching solution is inorganic solution such as concentrated base etching solution (for example the NaOH of 25-50% or the KOH aqueous solution) by weight or concentrated acid etching solution (for example the aqueous sulfuric acid of 60-98%) by weight.The example that is used for etching solution also can be the mixture of organic solvent such as m-cresol purple (m-cresol), trifluoroacetic acid (trifluoroacetic acid), o-chlorphenol (o-chlorophenol), trichlorophenol, 2,4,6,-T (trichlorophenol), DMSO (dimethyl sulfoxide (DMSO)), DMF (dimethyl formamide) and phenol (phenol) and tetrachloroethanes (tetrachloroethane).The normally 10-20 minute duration of immersing, therefore during this period bristle can be randomly with selected arbitrarily constant speed or in time and the speed that changes little by little withdraws from from etching solution, therefore may be influenced through the profile (that is unicity of outline line) of overetched end.After etching, water, diluted alkaline (dilute base), diluted acid (diluteacid) or suitable normally rinsing at room temperature of solvent can be decided on etching solution in the end, and dry.
Etching condition (duration of the type of etching solution and temperature, immersion) can be selected on the one hand like this so that the diameter D of tapering part after etching within the scope of the invention, that is 100-140 μ m.For this reason, the time of the bristle of the time ratio etching prior art point that carries out of etching is short.On the other hand, etched condition can be selected like this, so that at first taper off to a point, then it is repaired and obtains end face and tapering part.
If desired, the end of bristle can be in alkalescence or acid solution after the etching, this external will finishing before the end rounded.Whether the end needs finishing to pass through simply to determine with lens examination take out the end from solution after.
Purpose of the present invention also is a kind of toothbrush with bristle of the present invention.Bristle of the present invention can insert in the brush carrier of toothbrush with a kind of mode, and this mode is similar to the mode that prior art is used single or two tip bristles.Here, the bristle that has two tapering parts or have a tapering part and a tip portion of the present invention preferably inserts with fixed head and curves in the brush carrier of U-shaped.On the other hand, of the present invention have only the bristle of a tapering part preferably to insert in the brush carrier with a kind of method with unbent shape, and this method is commonly referred to as " AFT method " (no anchor cluster method (anchor free tufting)) in this technology.
Further specify the present invention referring now to example and accompanying drawing, therefore in the accompanying drawings:
-Fig. 1 illustrates the cutaway view of bristle of the present invention, therefore also shows measurement parameter required in this invention;
-Fig. 2,3 and 4 illustrate 3 embodiment of bristle of the present invention; And
-Fig. 5 and 6 illustrates with bristle of the present invention and common cylindrical shaped bristle to blackening and application TiO 2The clean-up performance test carried out external of tooth.
Example 1: the bristle that has two equal tapered ends by above-mentioned profile table 1-4 preparation
Utilize as the listed 4 kinds of commercially available biconial bristles of following table as initial bristle:
Initial bristle In a distance, distance end finishing [mm] Obtain the profile of numbering in the above-mentioned table
??Pragma?0.18×28mm??033004A-BBC ??2 ??1
??Pragma?0.19×28mm??033004A-BBC ??1 ??2
??Shinyoung?0.20×28mm ??2 ??3
??Wessen??0.18×24mm ??2 ??4
Every kind of initial bristle is all as above being repaired in two most advanced and sophisticated places under the distance shown in the middle stringer of table.The end of the tapering part of the bristle that obtains like that utilizes 240 order sand paper to round with TR89 bristle rounding machine (Japanese Tsujimura company make).
Fig. 1 illustrates the end with tapering part of bristle of the present invention.Cylindrical part 1 is shown on the right side, and its constant diameter means the maximum dimension D of bristle simultaneously Zyl, adjacent with cylindrical part 1 is tapering part 21, the taper of this tapering part 21 is the L beginning in the distance from the puncture site 6 of central axis 5 to end face 4, and with strictly monotone the inclination mode extend to end 3.It is after Utopian rounding that the end face 4 of end 3 illustrates herein, also approximate hemispherical shape; Because finishing and actual rounding subsequently so this end face also may be quite flat, but have more or less irregular or jagged edge.What illustrate in addition is, diameter D essential to the invention is that the distance in distance puncture site 6 is that the X place records, so distance X equals the above-mentioned maximum dimension D of above-mentioned cylindrical part Zyl
Fig. 2-4 illustrates three kinds of bristles of the present invention.In all these figure, bristle all shows and curves the U-shaped shape, and in this U-shaped shape, especially Fig. 2 and 3 bristle will be inserted in the brush carrier of toothbrush.Bending is to carry out in cylindrical part 1, and cylindrical part itself curves U-shaped then.Fig. 2 illustrates bristle of the present invention and has two tapering parts 21,22; Fig. 3 illustrates bristle of the present invention and has first tapering part 21 and most advanced and sophisticated 7; And Fig. 4 illustrates bristle of the present invention a tapering part 21 is only arranged, and the remainder of bristle is formed by cylindrical part 1.The bristle of this Fig. 4 can be different with Fig. 3, also are inserted in the brush carrier of head toothbrushes with unbent shape.
Fig. 5 and 6 illustrates the test to clean-up performance, this test the blackout and application TiO 2Tooth on obtain.What test is:
(A) have the toothbrush of bristle of the present invention, this bristle has two tapered ends, and rotary symmetry, and be inserted into (see figure 2) in the toothbrush with the U-shaped curved shape has and highly is the hair brush area of 11.5mm; Bristle has maximum dimension D ZylBe about 0.21mm, and at distance X=D ZylThe diameter D at place is about 0.104mm (these bristles are approximate corresponding with illustrational profile phase in the above-mentioned table 3); With
(B) have the toothbrush of conventional cylindrical bristle, this bristle is inserted in the toothbrush with curving the U-shaped shape, and has diameter D ZylBe 0.175mm; The height of hair brush area is 11.5mm.
In these trials, the tooth of the model of six subregions (sextant) of maxilla (have three grind one's teeth in sleep, three premolar teeths and a canine tooth) is at first dyed black, use TiO then 2Cream (containing 25g in the ethanol water of 75ml 26%) whitewashes white.Be that 250g carries out once determining to have removed TiO after the standardized step of brushing teeth continues 1 minute with hair brush area to be tested and applied pressure weight 2This part dental surface of cream.This operation sequence is used for each hair brush area to be tested by standardized mode, and to all usage level, the vertical and spin-cleaning motions of each hair brush area, described operation sequence all repeats 4 times each hair brush area to be tested and every kind of cleaning movement.When cleaning, level (represents with the white band among the figure) that the standardized step of brushing teeth comprises that 60 amplitudes are moving forward and backward of 30mm; When vertical cleaning (representing with the shade colour band among the figure), it comprises 60 motions up and down that amplitude is 8mm; And (represent with the point-like colour band in the drawings) that when spin-cleaning it comprises the circular motion that 60 radiuses are 4mm, the level that these 60 circular motion and 16 amplitudes are 30mm forward and backward motion is carried out simultaneously.The clean-up performance that records, that is remove TiO 2Part, in Fig. 5 and 6, represent with arbitrary unit.
Fig. 5 be illustrated on the cheek tooth surface with bristle of the present invention (colour band A) with common cylindrical shaped bristle (colour band B) level, the vertical and spin-cleaning motion summation of the mean value of clean-up performance afterwards.
Fig. 6 be illustrated near in/far away on the dental surface, that is, carry out the summation of the mean value of clean-up performance after level, the motion of vertical and spin-cleaning with bristle of the present invention (colour band A) and common cylindrical shaped bristle (colour band B) on the dental surface of diastema.
As can be seen from Figure 5, although bristle mechanical stiffness of the present invention is lower, level is better slightly than conventional bristles with vertical cleaning movement on the cheek tooth surface.As can be seen from Figure 6, bristle of the present invention near/especially better obvious in level and the vertical cleaning movement on the dental surface in far away.

Claims (10)

1. the bristle of a toothbrush comprises:
A) cylindrical part (1), this cylindrical part (1) have maximum constant circular column diameter D Zy1
B) first tapering part (21) adjacent with cylindrical part (1), this first tapering part (21) has bristle ends (3) and defines the end face (4) of bristle ends (3), thus first tapering part (21) forms taper towards bristle ends (3); With
C) Xiang Xiang central axis (5), this central axis (5) run through cylindrical part (1) and first tapering part (21), and locate to pierce through end face (4) in puncture site (6); It is 10mm or littler and 3mm at least that thereby first tapering part (21) has the length L that records at central axis (5) from puncture site (6) beginning;
It is characterized in that first tapering part (21) has to go up at central axis (5) from puncture site (6) beginning and equals cylinder diameter D in distance X Zy1The diameter D that the place records is 95-140 μ m.
2. according to the described bristle of claim 1, it is characterized in that D is in the 100-130 mu m range, preferably in the 100-125 mu m range.
3. according to claim 1 or 2 described bristles, it is characterized in that, first tapering part (21) has that to go up the diameter record from puncture site (6) in distance 1mm be 1 20-160 μ m and have at distance 0.1mm place that to use the diameter that records with quadrat method be 90-135 μ m at central axis (5).
4. according to one of them described bristle of claim 1-3, it is characterized in that, it with first tapering part (21) opposite side on have second tapering part (22) of contiguous cylindrical part (1).
5. according to the described bristle of claim 4, it is characterized in that second tapering part (22) has basically and the identical shape of first tapering part (21).
6. according to one of them described bristle of claim 1-3, its row is levied and is, it with first tapering part (21) opposite side on have the end (7) of the point of contiguous cylindrical part (1).
7. according to one of them described bristle of claim 1-6, it is characterized in that D Zy1Be in the 150-170 mu m range, perhaps in the 180-210 mu m range.
8. according to one of them described bristle of claim 1-7, constitute by polyester or polyamide.
9. according to one of them described bristle of claim 1-8, by PET, polybutylene terephthalate (PBT) or polyamide-6,6 constitutes.
10. toothbrush comprises one of them described one or more bristle of claim 1-9.
CN2008800247577A 2007-05-14 2008-05-08 Toothbrush bristle with a tapering part and toothbrush with such bristles Expired - Fee Related CN101742943B (en)

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CH781/07 2007-05-14
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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CN101742943B CN101742943B (en) 2012-09-05

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CN111345575A (en) * 2018-12-20 2020-06-30 日星美国公司 Toothbrush bristle

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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
USD961269S1 (en) 2020-07-31 2022-08-23 Colgate-Palmolive Company Oral care implement

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CN111345575A (en) * 2018-12-20 2020-06-30 日星美国公司 Toothbrush bristle

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EP2146600A1 (en) 2010-01-27
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RU2009146024A (en) 2011-06-20
CN101742943B (en) 2012-09-05

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