EP0850004A1 - Brosse a dents et procede de fabrication correspondant - Google Patents

Brosse a dents et procede de fabrication correspondant

Info

Publication number
EP0850004A1
EP0850004A1 EP96930161A EP96930161A EP0850004A1 EP 0850004 A1 EP0850004 A1 EP 0850004A1 EP 96930161 A EP96930161 A EP 96930161A EP 96930161 A EP96930161 A EP 96930161A EP 0850004 A1 EP0850004 A1 EP 0850004A1
Authority
EP
European Patent Office
Prior art keywords
bristle
bristles
toothbrush according
monofilament
core
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
EP96930161A
Other languages
German (de)
English (en)
Other versions
EP0850004B1 (fr
Inventor
Georg Weihrauch
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.)
Coronet Werke GmbH
Original Assignee
Coronet Werke GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Coronet Werke GmbH filed Critical Coronet Werke GmbH
Publication of EP0850004A1 publication Critical patent/EP0850004A1/fr
Application granted granted Critical
Publication of EP0850004B1 publication Critical patent/EP0850004B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46D—MANUFACTURE OF BRUSHES
    • A46D1/00—Bristles; Selection of materials for bristles
    • A46D1/02—Bristles details
    • A46D1/023—Bristles with at least a core and at least a partial sheath
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46D—MANUFACTURE OF BRUSHES
    • A46D1/00—Bristles; Selection of materials for bristles
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46D—MANUFACTURE OF BRUSHES
    • A46D1/00—Bristles; Selection of materials for bristles
    • A46D1/02—Bristles details
    • A46D1/0238—Bristles with non-round cross-section
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/253—Formation of filaments, threads, or the like with a non-circular cross section; Spinnerette packs therefor
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B2200/00—Brushes characterized by their functions, uses or applications
    • A46B2200/10—For human or animal care
    • A46B2200/1066—Toothbrush for cleaning the teeth or dentures
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/2929—Bicomponent, conjugate, composite or collateral fibers or filaments [i.e., coextruded sheath-core or side-by-side type]

Definitions

  • the invention relates to a toothbrush with a brush head and attached bristles made of plastic, optionally combined into bundles, at least some of which have a profile on their outer surface, and a method for producing a bristle for a toothbrush.
  • the invention can be used for an interdental cleaner, which should be expressly included.
  • the bristles usually consist of extruded monofilaments with a circular cross-section. Other cross sections have also been proposed.
  • the bristle end has to meet two opposing requirements, namely on the one hand to exert a sufficient brushing effect on the tooth and on the other hand to effect a reserved massage of the gingiva. The one in the foreground The cleaning effect of the tooth surfaces and interdental spaces is therefore insufficient due to compromise.
  • the invention is based on the object of proposing a toothbrush with profiled bristles which, with unchanged strength properties of the bristles has an increased cleaning and massage effect and which are inexpensive to produce.
  • the bristles have a helix as a profile.
  • Such a bristle can be produced by extrusion and can be finished in the same way as a conventional bristle. It has the advantage that, in addition to the bristle end, the head of the helix or its transition into the flanks and the flanks themselves form additional brush edges, which reinforce the cleaning action on the tooth surfaces and interdental spaces without endangering the gingiva. Even when such a bristle penetrates into the interdental spaces, the bristle cannot become jammed, since there are no radial constrictions. In addition, the helix can twist when it is pulled, so that in any case no pull-out forces which would be higher than with conventional bristles act on the bristle. Even if such a bristle strokes the gingiva with its coat, it will have a massage effect due to the spiral.
  • the bristles have a single or multi-start helix, which increases the areas effective during cleaning and at the same time creates different directions of action.
  • Another preferred embodiment is characterized in that the bristles consist of a core and at least one helix running over the outer surface. The core gives the brush the usual properties (flexibility, re-erection ability, etc.).
  • the helix has a trapezoidal cross-section, the head of the helix preferably being flattened or rounded in order not to allow sharp edges to arise. This can be done on the basis of extrusion or subsequently by mechanical or thermal processing.
  • the at least one rib differs in color from the core.
  • the plastic for the rib can be colored by pigments. Since the pigment particles are harder than the plastic matrix, the filament is given a certain abrasive effect solely by coloring.
  • the core and the at least one rib preferably consist of different materials.
  • the at least one rib can thus be adapted to certain operating conditions, in particular with regard to its hardness.
  • the user can be given an indication of the brush properties of the respective brush by means of a different color design of the core and the ribs.
  • Such ribs can also be obtained in a simple manner in that the monofilament has a polygonal, preferably square cross section having. After twisting, each edge then forms a rib.
  • Certain brushes require the bristles to have a predetermined stiffness or elasticity.
  • an adaptation of the rigidity can be achieved if the core has a core and a jacket surrounding the core made of different materials.
  • the stiffness and elasticity of the bristles on the one hand and their effect in dental care on the other hand can be influenced and varied as desired by selecting the materials for the soul and the coat.
  • the ribs running on the jacket can either consist of its material or a different material.
  • the bristles preferably consist of a profiled and subsequently twisted monofilament, the profile regions projecting beyond a fictitious circular cross section, the center of which forms the drill axis, each forming a helix during twisting.
  • the brushing effect depends, among other things, on the degree of twisting in relation to the effective length of a bristle or the bristle material, i.e. on the pitch of the helix formed as a result of the twisting. It has been shown that the pitch of the helix should not be greater than twice the useful length of the bristle, so that there is a helix rotating around the useful length by 180 °. Usually, however, the helix will have a smaller pitch, which can be up to the size of the diameter of the bristle material.
  • the monofilament or monofilaments consist of an elastic Plastic.
  • the bristles made of the bristle material can be stretched in the longitudinal direction, which results in a reduction in their diameter, so that, for example, they can be more easily pulled out of a tooth space after insertion and do not jam in the tooth space . Jamming is also prevented by the bristle being able to untwist when it is pulled out.
  • the bristles can also have a helix only over part of their length. Spiral bristles can be combined with bristles of a different configuration and processed together in order to be able to adapt the effectiveness of a brush to specified general conditions.
  • the invention proposes that a monofilament with at least one axially parallel rib is extruded, then twisted and finally the twist is fixed.
  • the bristles can then be produced by cutting them from an endless strand.
  • Another method is that a monofilament made of a plastic co-extrudes with ribs made of a plastic of other properties running on its outer surface, then the co-extruded composite is twisted and finally the twist is fixed.
  • the plastic forming the helix can be adapted to the intended use.
  • the core can consist of the plastic that is customary for bristles, while the plastic for the
  • Spiral softer or harder or with abrasive Fillers can be provided.
  • the plastic forming the reversible ribs can also be colored differently in order to enable a functional display.
  • the core can also consist of different materials in certain areas in order to adapt the bristle to its intended use.
  • the core has an inner area and a jacket surrounding the inner area made of different materials that are co-extruded.
  • Another possibility for production is that at least two monofilaments are extruded, then twisted and the twist is fixed.
  • the monofilaments can be permanently connected to one another during extrusion or after twisting.
  • the bristle designed according to the invention also gives the possibility that the extruded monofilament or the coextruded composite is stretched and, if necessary, stabilized in order to give the bristle with the helix the properties required by bristles for toothbrushes.
  • the bristle ends must be rounded after trimming in order to avoid damage to the teeth and injuries to the gingiva. This is advantageously done by melting the bristle ends on the surface, since the ends of the thin-walled coil melt in front of the core and consequently the sharp edges recede first.
  • a bristle produced by one of the aforementioned processes is also outstandingly suitable as or for interdental cleaners.
  • An interdental cleaner has further advantages if it is twisted only in a partial area of its length. The untwisted section has smaller cross-sectional dimensions and is therefore easier to insert into an interdental space. The insertion can be made even easier if the untwisted portion has at least in sections a cross section flattened, for example, by pressing.
  • the bristles are fastened to the brush body in a flawless and pull-out-resistant manner.
  • the bristles are melted individually or in groups at their end on the fastening side to form a head and are anchored with the latter in the brush body.
  • the fastening-side end is given a uniform spherical or lenticular cross-section, which enables it to be properly anchored in the brush head.
  • Figure 1 is a schematic side view of a toothbrush
  • Figure 2 is an enlarged detail view of a bristle
  • the toothbrush according to FIG. 1 has a head 30 and a handle 31, which are connected to one another via a flexible neck 32.
  • the head 30, the handle 31 and the neck 32 are injection-molded in one piece from plastic.
  • Bristles in the form of bundles 33 are fastened to the head 30.
  • the bundles 33 are only shown schematically, they each order from a plurality of bristles made of plastic, which are attached to the head 30 by welding, injection or in a mechanical manner.
  • FIG. 2 shows a single bristle 1 from a bundle 33. It consists of a circular cylindrical core 2, on the outer surface of which a two-start helix 4 with the two helices 5, 6 is arranged. Each helix 5, 6 has a flattened upper rounded head 7 or 8.
  • a bristle for toothbrushes can have, for example, an outer diameter in the range of 0.2 mm, the core 2 having a diameter in the range of 0.1 to 0.15 mm. With the length of the bristles up to 1.5 cm customary for toothbrushes, the helix has a number of gears of 2 to 6.
  • the bristle according to Figure 2 can be manufactured in various ways.
  • FIG. 4 shows an extruded monofilament 9 with an approximately triangular cross section, which is formed from a core 13 and three ribs 14, 15 and 16.
  • Figure 5 shows a Monofil 9 with a cross-shaped cross section, which in turn has a core 17 and four symmetrically arranged ribs 18, 19, 20 and 21.
  • the drill axis coincides with the axis of the core 2.
  • the monofilament can also have an essentially rectangular, for example square, cross section, the region near the center forming the core and the four corner regions forming the ribs.
  • Figures 6 to 8 show essentially the same cross-sectional shapes as Figures 3 to 5, but in this case the circular cylindrical cores 10, 13, 17 are coextruded with the ribs 11, 12 or 14 to 16 or 18 to 21 dated. The extruded monofilament or the coextruded composite is then stretched, twisted and thermally stabilized and stored for 1 to 2 days.
  • FIGS. 9 to 11 show cross-sectional shapes similar to those in FIGS. 6 to 8, but the cores 10, 13, 17 have a core 10a, 13a and 17a and a jacket 10b, 13b and 17b surrounding the core.
  • the soul and the coat are made of different materials.
  • the ribs 11, 12 or 14 to 16 or 18 to 21 consist of a further material.
  • the soul is co-extruded with the jacket and the ribs and then processed in the manner mentioned.
  • the core 10a, 13a and 17a can consist of the plastic typical for toothbrush bristles in order to ensure all the positive strength properties of a conventional bristle, while the plastic material for the jacket 10b, 13b, 17b and for the ribs 11, 12 or 14 to 16 or 18 to 21 can be tailored to the desired cleaning and / or massage effect.
  • the head of the Ribs flattened or rounded.
  • the ends on the usage side are rounded, preferably by surface melting, while the ends on the fastening side are melted individually or in groups to form a head.
  • the bristle 1 or the monofilament from which it is made can also have a rectangular, preferably square, cross section. After twisting, the edges of this cross section each form a rib.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Brushes (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)

Abstract

L'invention concerne une brosse à dents possédant une tête sur laquelle sont fixées de poils en matière plastique éventuellement regroupés en faisceaux. Au moins certains poils ont une surface latérale profilée. Afin d'obtenir des poils présentant des effets de nettoyage et de massage améliorés avec des propriétés de résistance inchangées, on a doté les poils d'un profil en forme de spirale. Les poils peuvent être constitués d'une âme et d'au moins une spirale s'étendant sur toute leur surface latérale. Pour fabriquer la brosse à dents, on peut extruder un monofil profilé ou un monofil doté de nervures parallèles à l'axe que l'on torsade puis on fixe la torsade ainsi obtenue. Il est également possible de coextruder un monofil en matière plastique avec des nervures s'étendant sur la surface latérale, ces nervures étant réalisées dans une matière plastique ayant des propriétés différentes. Ensuite, on torsade le corps composite coextrudé et on fixe la torsade ainsi obtenue.
EP96930161A 1995-09-13 1996-09-04 Brosse a dents et procede de fabrication correspondant Expired - Lifetime EP0850004B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19533815A DE19533815A1 (de) 1995-09-13 1995-09-13 Zahnbürste und Verfahren zu ihrer Herstellung
DE19533815 1995-09-13
PCT/EP1996/003873 WO1997009907A1 (fr) 1995-09-13 1996-09-04 Brosse a dents et procede de fabrication correspondant

Publications (2)

Publication Number Publication Date
EP0850004A1 true EP0850004A1 (fr) 1998-07-01
EP0850004B1 EP0850004B1 (fr) 1999-08-04

Family

ID=7771986

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96930161A Expired - Lifetime EP0850004B1 (fr) 1995-09-13 1996-09-04 Brosse a dents et procede de fabrication correspondant

Country Status (28)

Country Link
US (1) US6161243A (fr)
EP (1) EP0850004B1 (fr)
JP (1) JPH11513269A (fr)
KR (1) KR100452562B1 (fr)
CN (1) CN1105534C (fr)
AR (1) AR003561A1 (fr)
AT (1) ATE182758T1 (fr)
AU (1) AU707521B2 (fr)
BR (1) BR9610598A (fr)
CA (1) CA2231532A1 (fr)
CZ (1) CZ287243B6 (fr)
DE (2) DE19533815A1 (fr)
DK (1) DK0850004T3 (fr)
ES (1) ES2135917T3 (fr)
GR (1) GR3031759T3 (fr)
HU (1) HU220851B1 (fr)
IL (1) IL123449A (fr)
IN (1) IN188998B (fr)
NO (1) NO314977B1 (fr)
NZ (1) NZ330176A (fr)
PL (1) PL183811B1 (fr)
RU (1) RU2157078C2 (fr)
SK (1) SK284771B6 (fr)
TR (1) TR199800455T1 (fr)
TW (1) TW312615B (fr)
UA (1) UA55395C2 (fr)
WO (1) WO1997009907A1 (fr)
ZA (1) ZA967701B (fr)

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US8876221B2 (en) * 2002-08-09 2014-11-04 Colgate-Palmolive Company Oral care implement
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EP2186434B1 (fr) * 2008-11-05 2016-10-12 Braun GmbH Brosse à dent, brosse et tête de brosse pour une brosse à dent
US8402591B2 (en) * 2009-07-01 2013-03-26 Colgate-Palmolive Company Toothbrush having improved tuft retention and anchor wire
JP5504076B2 (ja) * 2009-07-07 2014-05-28 Ｋｂセーレン株式会社 ブラシ用毛材およびその製造方法
CA2780830C (fr) * 2009-11-13 2016-05-03 Sunstar Inc. Filament composite ame-enveloppe pour brosse a dents et brosse a dents le comprenant
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DE102013007870A1 (de) 2013-05-08 2014-11-13 Pedex Gmbh Monofil aus Kunststoff und Zahnbürsten-Borste aus einem entsprechenden Monofil
AU2013407525B2 (en) * 2013-12-12 2017-01-19 Colgate-Palmolive Company Spiral bristle having strand components with different oral care additives, and oral care implement comprising the same
US10477958B2 (en) 2013-12-12 2019-11-19 Colgate-Palmolive Company Multi-component bristle having components with different oral care additives, and oral care implement comprising the same
EP2918191B1 (fr) 2014-03-11 2024-01-24 The Procter & Gamble Company Tête pour un instrument de soin buccal
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KR101874948B1 (ko) * 2016-03-09 2018-07-10 비비씨 주식회사 이중 구조의 필라멘트
ES2795427T3 (es) * 2016-06-03 2020-11-23 Procter & Gamble Cabezal para un utensilio de cuidado bucal y utensilio de cuidado bucal
PL3251547T3 (pl) * 2016-06-03 2024-06-24 The Procter & Gamble Company Włókno dla narzędzia do higieny jamy ustnej i narzędzie do higieny jamy ustnej
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EP3251549B1 (fr) * 2016-06-03 2019-12-25 The Procter and Gamble Company Duvet et tête pour un instrument de soins buccaux et instrument pour soins buccaux
US10251470B1 (en) 2017-10-10 2019-04-09 The Procter & Gamble Company Head for an oral care implement and oral care implement
US11219302B2 (en) 2017-10-10 2022-01-11 The Procter & Gamble Company Head for an oral care implement and oral care implement
US10869545B2 (en) * 2017-10-10 2020-12-22 The Procter & Gamble Company Filament for an oral care implement and oral care implement
US10869546B2 (en) * 2017-10-10 2020-12-22 The Procter & Gamble Company Tuft and head for an oral care implement and oral care implement
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CN109371480B (zh) * 2018-10-15 2021-05-25 广州东资达实业有限公司 一种密曲无压伤刷丝及其制备方法
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AR003561A1 (es) 1998-08-05
CA2231532A1 (fr) 1997-03-20
PL325521A1 (en) 1998-08-03
DE59602652D1 (de) 1999-09-09
ZA967701B (en) 1997-03-25
KR100452562B1 (ko) 2004-12-17
AU707521B2 (en) 1999-07-15
DK0850004T3 (da) 2000-03-06
EP0850004B1 (fr) 1999-08-04
RU2157078C2 (ru) 2000-10-10
PL183811B1 (pl) 2002-07-31
HUP9900658A2 (hu) 1999-06-28
CN1105534C (zh) 2003-04-16
WO1997009907A1 (fr) 1997-03-20
NZ330176A (en) 1999-08-30
TW312615B (fr) 1997-08-11
KR19990044193A (ko) 1999-06-25
BR9610598A (pt) 1999-07-06
CZ70298A3 (cs) 1998-10-14
US6161243A (en) 2000-12-19
IL123449A (en) 2001-05-20
JPH11513269A (ja) 1999-11-16
CN1195973A (zh) 1998-10-14
SK27698A3 (en) 1998-11-04
NO981085L (no) 1998-03-12
NO981085D0 (no) 1998-03-12
NO314977B1 (no) 2003-06-23
TR199800455T1 (xx) 1998-05-21
HUP9900658A3 (en) 1999-11-29
IL123449A0 (en) 1998-09-24
MX9802010A (es) 1998-08-30
DE19533815A1 (de) 1997-03-20
AU6931396A (en) 1997-04-01
SK284771B6 (sk) 2005-11-03
IN188998B (fr) 2002-12-07
GR3031759T3 (en) 2000-02-29
UA55395C2 (uk) 2003-04-15
HU220851B1 (en) 2002-06-29
ES2135917T3 (es) 1999-11-01
CZ287243B6 (en) 2000-10-11
ATE182758T1 (de) 1999-08-15

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