US20020116778A1 - Toothbrush with highly tapered bristles having superior flexibility and method of manufacturing the same - Google Patents

Toothbrush with highly tapered bristles having superior flexibility and method of manufacturing the same Download PDF

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Publication number
US20020116778A1
US20020116778A1 US09/956,897 US95689701A US2002116778A1 US 20020116778 A1 US20020116778 A1 US 20020116778A1 US 95689701 A US95689701 A US 95689701A US 2002116778 A1 US2002116778 A1 US 2002116778A1
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US
United States
Prior art keywords
bristles
toothbrush
tapered
monofilaments
bristle
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.)
Abandoned
Application number
US09/956,897
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English (en)
Inventor
Young-Jun Kwon
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.)
Best Whasung Co Ltd
Original Assignee
Individual
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 Individual filed Critical Individual
Assigned to KWON, YOUNG-JUN, BEST WHASUNG CO. LTD. reassignment KWON, YOUNG-JUN ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KWON, YOUNG-JUN
Publication of US20020116778A1 publication Critical patent/US20020116778A1/en
Priority to US10/677,286 priority Critical patent/US6764142B2/en
Abandoned legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B9/00—Arrangements of the bristles in the brush body
    • A46B9/02—Position or arrangement of bristles in relation to surface of the brush body, e.g. inclined, in rows, in groups
    • A46B9/04—Arranged like in or for toothbrushes
    • 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
    • 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
    • Y10T428/2973—Particular cross section
    • Y10T428/2976—Longitudinally varying
    • 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
    • Y10T428/298—Physical dimension

Definitions

  • the present invention relates to, in general, a toothbrush with tapered bristles and a method of manufacturing such toothbrushes, in particular, to a toothbrush with highly tapered bristles having high flexibility and a method of manufacturing the same.
  • a conventional monofilament for bristles of toothbrushes is made of nylon.
  • the nylon monofilament bristles have the advantages of proper resilience and flexibility, but are disadvantageous in that they are highly water-absorbent and are easily deformed.
  • the nylon monofilament bristles are not soft because they must be thick in order to maintain desired flexibility.
  • the nylon monofilament bristles are each rounded at their ends in order to prevent the gums from being injured during brushing, as shown in FIG. 1.
  • Polyester compounds such as polybutylene terephthalate or polyethylene terephthalate, may be used as material for the monofilament bristles of toothbrushes.
  • the polyester compound bristles In comparison with nylon bristles, the polyester compound bristles have advantages of a lower price, good durability, and lower water-absorptivity, and so such polyester compounds are preferable for bristles of toothbrushes.
  • the monofilament bristles made of such polyester compounds are too stiff and inferior in their flexibility, and may damage or injure the gums.
  • the polyester compounds have been typically used as the materials for bristles of inexpensive disposable toothbrushes, or the polyester compound bristles used in combination with nylon bristles, as a way to reduce the cost.
  • Korean Patent No. 130932 (hereafter, refer to ‘first prior art’), which discloses a method of tapering a monofilament for bristles using chemicals.
  • the method disclosed in the Korean Patent comprises the steps of (i) cutting a monofilament made of polybutylene terephthalate or polyethylene terephthalate in such a way that the length of a primarily cut monofilament is longer than a target length by 1 to 4 mm, (ii) vertically dipping the surplus portion of the primarily cut monofilament into a sulfuric acid in order to remove the surplus portion of the primarily cut monofilament, in addition to tapering the end of the monofilament to form the target length of a resulting filament.
  • the first prior art provides bristles with a somewhat desired softness by reducing the stiffness of the polyester compound filaments such as polybutylene terephthalate filaments, and easily removing an odontolith from a periodontal pocket by highly tapering the end of the monofilament, as shown in FIG. 3.
  • Korean Patent No. 261658 (hereafter, referred to as the ‘second prior art’), which discloses a method of tapering a monofilament for the bristles of toothbrushes. This method comprises the steps of (i) primarily cutting a filament made of polybutylene terephthalate or polyethylene terephthalate into bristles having a target length, (ii) dipping the bristles into a strong alkali or acid solution at the temperature of 100 to 180° C.
  • FIG. 4 A cross sectional view of a tapered bristle according to the second prior art is illustrated in FIG. 4.
  • the bristles of the second prior art suffer from disadvantages in that it is difficult to remove the odontolith from a periodontal pocket because the diameter of the bristle ends in the second prior art, which ranges from 0.04 to 0.08 mm, is undesirably larger than that of the bristles in the first prior art, and the price of the bristles according to the second prior art is cheaper in that it is 25% of the price of the bristles in the first prior art.
  • FIG. 1 is a cross sectional view of a bristle having a rounded end according to the prior art
  • FIG. 2 is a cross sectional view of a tapered bristle according to the prior art
  • FIG. 3 is a cross sectional view of a highly tapered bristle according to the prior art
  • FIG. 4 is a cross sectional view of a tapered bristle having superior flexibility according to the prior art.
  • FIG. 5 is a cross sectional view of a highly tapered bristle having superior flexibility according to the present invention.
  • the bristles should be tapered starting at a position of 4 to 10 mm, typically 7 to 8 mm from an end of the bristle in order to allow the tapered end of the bristle to be 0.01 mm of diameter. This is because the whole bristle is eroded, not only at the ends of the bristles, when they are being dipped into chemicals, thereby reducing the flexibility of the bristles.
  • the bristle is tapered starting at a position of 4 to 5 mm from an end of the bristle, with the free end of the bristle being 0.04 to 0.08 mm in diameter.
  • the bristles with short tapered ends according to the second prior art has increased flexibility, but it is difficult for the bristle of the second prior art to remove an odontolith from a periodontal pocket because the end of the bristle is relatively thick, as described above.
  • tapered bristles are obtained, each of which is tapered starting at a position of 3.5 mm or less, preferably 3 mm or less from an end of the bristle, with the free end of the bristle being 0.02 mm or less, preferably 0.01 mm or less in diameter, as shown in FIG. 5
  • the bristle of this invention has advantages in that the odontolith can be easily removed from periodontal pockets because the end of the bristle has a small diameter.
  • This bristle also improves the feeling while brushing because it is better than that of the second prior art in flexibility.
  • a thin end of this bristle provides softness, so that the bristles are less likely to cause damage to the gums while toothbrushing. Accordingly, the bristles of the invention can overcome the disadvantages of the prior arts.
  • a method of manufacturing the bristles of the invention comprises the steps of dipping a portion of 3.5 mm length from an end of a monofilament for bristles into erosive chemicals such as sulfuric acid or sodium hydroxide until the dipped portion of the monofilament is completely eroded; neutralizing the shortened monofilament prior to rinsing and drying it; implanting such shortened monofilaments on the head of a toothbrush; and grinding the implanted monofilaments with a 240# mesh paper at 2600 to 3000 rpm for 3 to 10 sec, a 320# mesh paper at same speed for 3 to 10 sec, and a 400# mesh paper at same speed for 3 to 10 sec, thus forming the resulting bristles.
  • erosive chemicals such as sulfuric acid or sodium hydroxide
  • tapered bristles with each free end ranging from 0.005 mm to 0.02 mm in diameter are obtained, each of which are tapered starting at a position of 2.8 mm to 3.5 mm from the base end of the bristle, without wasting materials.
  • highly tapered filaments each of which was tapered starting at a position of 3.0 mm from an end of the filament with the end being 0.01 mm in diameter, were obtained by the steps of fully rinsing the filament bundles with water; drying the bundles after binding the filaments with a rubber band; attaching the filaments on the head of a toothbrush; and grinding the filaments by use of a cutting and grinding machine with a 240# mesh paper rotated at 2700 rpm for 5 sec., a 320# mesh paper at the same speed for 5 sec., and a 400# mesh paper at the same speed for 5 sec.
  • toothbrushes were evaluated as excellent toothbrushes in regard with flexibility, softness, feeling while brushing, and scaling ability.
  • toothbrushes were evaluated lowly in comparison with those of Example in regard with flexibility, softness, feeling while brushing, and scaling ability.
  • the toothbrush of the invention provides proper flexibility and softness, and easily removes an odontolith from a periodontal pocket, with bristles creating a good feeling for the user while brushing. Also, the toothbrush of the present invention prevents waste of materials and reduces the defective proportion of products during production of toothbrushes, different from toothbrushes having conventional highly tapered bristles.

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  • Brushes (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)
US09/956,897 2001-02-23 2001-09-21 Toothbrush with highly tapered bristles having superior flexibility and method of manufacturing the same Abandoned US20020116778A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US10/677,286 US6764142B2 (en) 2001-02-23 2003-10-03 Method of manufacturing a toothbrush with highly tapered bristles having superior flexibility

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR2001-9217 2001-02-23
KR10-2001-0009217A KR100421454B1 (ko) 2001-02-23 2001-02-23 탄력성이 우수한 고도 테이퍼링 칫솔모가 식모된 칫솔 및그 제조방법

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US10/677,286 Division US6764142B2 (en) 2001-02-23 2003-10-03 Method of manufacturing a toothbrush with highly tapered bristles having superior flexibility

Publications (1)

Publication Number Publication Date
US20020116778A1 true US20020116778A1 (en) 2002-08-29

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Family Applications (2)

Application Number Title Priority Date Filing Date
US09/956,897 Abandoned US20020116778A1 (en) 2001-02-23 2001-09-21 Toothbrush with highly tapered bristles having superior flexibility and method of manufacturing the same
US10/677,286 Expired - Lifetime US6764142B2 (en) 2001-02-23 2003-10-03 Method of manufacturing a toothbrush with highly tapered bristles having superior flexibility

Family Applications After (1)

Application Number Title Priority Date Filing Date
US10/677,286 Expired - Lifetime US6764142B2 (en) 2001-02-23 2003-10-03 Method of manufacturing a toothbrush with highly tapered bristles having superior flexibility

Country Status (9)

Country Link
US (2) US20020116778A1 (de)
EP (1) EP1234525B1 (de)
JP (2) JP2002262940A (de)
KR (1) KR100421454B1 (de)
CN (1) CN1291675C (de)
AT (1) ATE278339T1 (de)
DE (1) DE60201451T2 (de)
ES (1) ES2230401T3 (de)
HK (1) HK1050123A1 (de)

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US20040083569A1 (en) * 2002-10-31 2004-05-06 Cj Corp. Toothbrush having soft and hard bristles together
US20060090276A1 (en) * 2004-11-02 2006-05-04 Colgate-Palmolive Company Toothbrush and method of making the same
US20060164022A1 (en) * 2003-04-27 2006-07-27 Furu Zhu Illumination system having cold cathode started, illumination controlled gas discharge lamps in series
US20080197693A1 (en) * 2005-06-03 2008-08-21 Young-Jun Kwon Method of Manufacturing Toothbrush with Needle-Shaped Bristles, and Toothbrush Manufactured by the Same
US20080224529A1 (en) * 2005-10-14 2008-09-18 Young-Jun Kwon Method of Tapering Bristles for Toothbrushes, and Toothbrush Having Bristles Manufactured by Said Method
US20080315669A1 (en) * 2004-12-08 2008-12-25 Young-Jun Kwon Method of Manufacturing Toothbrush With Needle-Shaped Bristles and Toothbrush Manufactured by the Same
EP2083653A1 (de) * 2006-11-16 2009-08-05 Best Whasung Co., Ltd. Verfahren zur herstellung von nadelförmigen borsten mit kurzer, sich verjüngender länge und von zahnbürsten mit demselben herstellungsverfahren
US20110109149A1 (en) * 2008-06-07 2011-05-12 Trisa Holding Ag Method for producing toothbrushes bristled in an anchorless manner
US20120174331A1 (en) * 2009-07-31 2012-07-12 Best Whasung Co., Ltd. Toothbrush with needle-shaped bristles for improving tooth and gum contacting force and teeth-cleaning performance, and method for manufacturing same
US8332982B2 (en) 2004-04-23 2012-12-18 The Gillette Company Vibrating toothbrush
DE102011105083A1 (de) 2011-06-21 2012-12-27 Jovica Vukosavljevic Chemisch-mechanisches Verfahren zur Herstellung komplexer Borstenprofile
USD754443S1 (en) 2014-06-11 2016-04-26 Colgate-Palmolive Company Oral care implement
US20170251796A1 (en) * 2014-09-02 2017-09-07 Yohei Tsuji Toothbrush and method for manufacturing toothbrush
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WO2018044751A1 (en) * 2016-08-29 2018-03-08 Colgate-Palmolive Company Oral care implement and filament for the same
USRE47468E1 (en) 2001-12-28 2019-07-02 Trisa Holding Ag Toothbrush and process for producing such a toothbrush
US10405642B2 (en) 2002-12-19 2019-09-10 Trisa Holding Ag Toothbrush and process for producing the same
US11219303B2 (en) 2016-04-20 2022-01-11 Trisa Holding Ag Brush product and method for the production thereof

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USRE47468E1 (en) 2001-12-28 2019-07-02 Trisa Holding Ag Toothbrush and process for producing such a toothbrush
US7134162B2 (en) * 2002-10-31 2006-11-14 Cj Corp. Toothbrush having soft and hard bristles together
US20040083569A1 (en) * 2002-10-31 2004-05-06 Cj Corp. Toothbrush having soft and hard bristles together
US10405642B2 (en) 2002-12-19 2019-09-10 Trisa Holding Ag Toothbrush and process for producing the same
US20060164022A1 (en) * 2003-04-27 2006-07-27 Furu Zhu Illumination system having cold cathode started, illumination controlled gas discharge lamps in series
US8332982B2 (en) 2004-04-23 2012-12-18 The Gillette Company Vibrating toothbrush
US8042217B2 (en) 2004-11-02 2011-10-25 Colgate-Palmolive Company Toothbrush and method of making the same
US20060090276A1 (en) * 2004-11-02 2006-05-04 Colgate-Palmolive Company Toothbrush and method of making the same
US20080315669A1 (en) * 2004-12-08 2008-12-25 Young-Jun Kwon Method of Manufacturing Toothbrush With Needle-Shaped Bristles and Toothbrush Manufactured by the Same
US7832811B2 (en) * 2004-12-08 2010-11-16 Young-Jun Kwon Method of manufacturing toothbrush with needle-shaped bristles and toothbrush manufactured by the same
US20080197693A1 (en) * 2005-06-03 2008-08-21 Young-Jun Kwon Method of Manufacturing Toothbrush with Needle-Shaped Bristles, and Toothbrush Manufactured by the Same
US8186765B2 (en) * 2005-06-03 2012-05-29 Best Whasung Co., Ltd. Method of manufacturing toothbrush with needle-shaped bristles, and toothbrush manufactured by the same
US20080224529A1 (en) * 2005-10-14 2008-09-18 Young-Jun Kwon Method of Tapering Bristles for Toothbrushes, and Toothbrush Having Bristles Manufactured by Said Method
US8336967B2 (en) * 2005-10-14 2012-12-25 Young-Jun Kwon Method of tapering bristles for toothbrushes, and toothbrush having bristles manufactured by said method
EP2083653A1 (de) * 2006-11-16 2009-08-05 Best Whasung Co., Ltd. Verfahren zur herstellung von nadelförmigen borsten mit kurzer, sich verjüngender länge und von zahnbürsten mit demselben herstellungsverfahren
EP2083653A4 (de) * 2006-11-16 2015-03-18 Best Whasung Co Ltd Verfahren zur herstellung von nadelförmigen borsten mit kurzer, sich verjüngender länge und von zahnbürsten mit demselben herstellungsverfahren
US8534769B2 (en) 2008-06-07 2013-09-17 Trisa Holding Ag Method for producing toothbrushes bristled in an anchorless manner
US9173480B2 (en) 2008-06-07 2015-11-03 Trisa Holding Ag Method for producing toothbrushes covered with bristles in an anchor-free manner
US20110109149A1 (en) * 2008-06-07 2011-05-12 Trisa Holding Ag Method for producing toothbrushes bristled in an anchorless manner
US20120174331A1 (en) * 2009-07-31 2012-07-12 Best Whasung Co., Ltd. Toothbrush with needle-shaped bristles for improving tooth and gum contacting force and teeth-cleaning performance, and method for manufacturing same
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US10244857B2 (en) 2016-08-29 2019-04-02 Colgate-Palmolive Company Oral care implement and filament for the same
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RU2720652C1 (ru) * 2016-08-29 2020-05-12 Колгейт-Палмолив Компани Приспособление для ухода за полостью рта и нить для него
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US20040070258A1 (en) 2004-04-15
CN1371645A (zh) 2002-10-02
JP2004337623A (ja) 2004-12-02
KR100421454B1 (ko) 2004-03-09
HK1050123A1 (en) 2003-06-13
DE60201451T2 (de) 2005-11-24
US6764142B2 (en) 2004-07-20
ES2230401T3 (es) 2005-05-01
EP1234525A3 (de) 2003-11-12
DE60201451D1 (de) 2004-11-11
EP1234525B1 (de) 2004-10-06
CN1291675C (zh) 2006-12-27
ATE278339T1 (de) 2004-10-15
JP2002262940A (ja) 2002-09-17
KR20020068860A (ko) 2002-08-28
JP4106045B2 (ja) 2008-06-25

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