CN111770703A - Filament and toothbrush with at least one corresponding filament - Google Patents

Filament and toothbrush with at least one corresponding filament Download PDF

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Publication number
CN111770703A
CN111770703A CN201980009645.2A CN201980009645A CN111770703A CN 111770703 A CN111770703 A CN 111770703A CN 201980009645 A CN201980009645 A CN 201980009645A CN 111770703 A CN111770703 A CN 111770703A
Authority
CN
China
Prior art keywords
plastic material
projections
filament
head part
projection
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.)
Pending
Application number
CN201980009645.2A
Other languages
Chinese (zh)
Inventor
H-U.普施
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.)
Pedex GmbH
Original Assignee
Pedex 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 Pedex GmbH filed Critical Pedex GmbH
Publication of CN111770703A publication Critical patent/CN111770703A/en
Pending 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
    • 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
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
    • D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
    • D01F8/14—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyester as constituent

Abstract

The invention relates to a filament having a matrix made of a first plastic material. The base body extends along a longitudinal axis, wherein a cross section of the base body has a radially inner base portion and a plurality of projections projecting radially outward from the base portion. The projection is formed integrally with the base section. It is provided that the at least one projection has a head part at its radially outer end. The head part is composed of a second plastic material, which is different from the first plastic material of the base body.

Description

Filament and toothbrush with at least one corresponding filament
The invention relates to a Filament (Filament) having a main body made of a first plastic material, which extends along a longitudinal axis, wherein a cross section of the main body has a radially inner base section and a plurality of projections projecting radially outward from the base section, which projections are formed in one piece with the base section.
Furthermore, the invention relates to a toothbrush having at least one filament of this type.
An axial direction in the sense of the present application is a direction parallel to the longitudinal axis of the matrix of filaments. The radial direction is perpendicular to the longitudinal axis of the base body of the filament and is referred to the center point of the cross-section of the base body.
Filaments of the type described in the present invention are known from the prior art, in which the base section of the cross section has four radially outwardly projecting elevations which are arranged at intervals in the circumferential direction of the base section and thus form a star-shaped contour. All protrusions have the same radial distance to the center point of the cross-section. The region between two adjacent projections in the circumferential direction of the cross section is provided with a curved, continuous transition.
The known filaments have only an even cleaning effect when brushing teeth.
The invention is therefore based on the object of further developing a thread of the type according to the invention and a toothbrush of the type according to the invention in such a way that a thread with improved cleaning results is obtained.
This technical problem is solved by a filament having the technical features of claim 1 and by a toothbrush according to claim 15 having a filament according to the present invention.
The thread according to the invention is characterized in that at least one projection has, at its radially outer end, a head part which consists of a second plastic material which is different from the first plastic material of the base body.
The invention is based on the idea that the projection provided with the head part has a greater radial length than the projection of the headless part. Thereby increasing the area between two adjacent lobes for receiving toothpaste. The selection of the second plastic material makes it possible to improve the cleaning effect of the projections and thus of the entire thread, in particular during brushing.
The projections are preferably formed along the entire length of the thread, so that radially projecting ribs extending in the longitudinal direction of the thread are formed along the projections. This increases the area for containing the toothpaste and thus the cleaning effect when brushing the teeth.
In order to further increase the area for receiving toothpaste, at least six projections, in particular at least eight projections, can be provided. The projections may be arranged evenly distributed in the circumferential direction of the cross section of the base section.
The projections are preferably arranged point-symmetrically with respect to a center point of the cross section of the base section, which corresponds to a particularly simple arrangement. The plurality of projections most preferably each have a head member to increase the area for receiving toothpaste.
In a further development of the invention, the projections with the head part and the projections without the head part are arranged alternately in the circumferential direction of the base section, which corresponds to a regular pattern of the thread. Alternatively, each projection may have a head member, thereby increasing the area for receiving toothpaste and improving cleaning during brushing.
The head part can be connected at least positively and/or materially to the projection. For example, the head member may be welded and/or bonded to the projection. The head part can in particular be fastened to the projection by means of an undercut, wherein, for example, a radially inwardly directed engagement part of the head part engages in a recess of the projection provided with the undercut. Alternatively, however, the projection may also have a radially outwardly directed engagement piece which engages in a recess of the head part which is provided with an undercut. Additionally or alternatively, the head part can be arranged on the projection in a material-fit manner and in particular welded to this projection.
In order to increase the area for receiving the toothpaste particularly efficiently, the radial apex of the head part may project radially beyond the radial apex of the projection, i.e. the projection with the head part has a greater radial distance to the centre point of the cross-section than the projection without the head part. In the sense of the present invention, the radial distance is defined as the distance to the center point of the cross-section of the matrix, said center point generally coinciding with the longitudinal axis of the filament.
The radial distance of the radial apex of the projection of the headless part may be in the range 50 μm to 150 μm, in particular in the range 75 μm to 125 μm, and for example in the range of approximately 100 μm. The radial apex of the bulge is the point of the bulge having the greatest radial distance in the sense of the present invention. The radial apex of the head part on the projection preferably projects beyond the radial apex of the projection of the headless part by 10 μm to 30 μm, in particular by approximately 20 μm. In a preferred embodiment of the invention, the ratio of the difference in radial distance between the head part and the projection of the headless part to the radial length of the projection of the headless part is between 5% and 20%, in particular between 5% and 15%, preferably approximately 10%.
The first plastic material of the base body is preferably a thermoplastic polyester, in particular PBT (polybutylene terephthalate). The material has sufficient rigidity to be applied to a toothbrush in view of its shore hardness. The second plastic material of the head part may be a thermoplastic plastic material, such as a thermoplastic elastomer, having a particularly lower shore hardness than the first plastic material. The material has good cleaning effect under the condition of tooth contact when brushing teeth.
All head parts are preferably composed of the same second plastic material, so that the thread is particularly simple to produce.
At least one head part is preferably composed of a third thermoplastic plastic material, which is different from the first plastic material and the second plastic material. In particular, one group of head parts can be made of a second thermoplastic material and the other group of head parts can be made of a third plastic material. The third thermoplastic material may have a lower shore hardness than the first plastic material. The choice of different plastic materials for the head part enables an optimization of the cleaning effect during brushing.
The filament may be twisted about its longitudinal axis such that the projection and the head member are arranged helically along the longitudinal direction of the filament. The filaments can have a twist of 100U/m (revolutions per meter) to 300U/m, in particular a twist of 200U/m to 170U/m, in particular a twist of approximately 150U/m. By the spiral arrangement, toothpaste will be better retained between two adjacent projections, especially when brushing teeth.
Further advantages and technical features of the invention are given by the claims and the following description, wherein embodiments of the invention are specifically set forth with reference to the drawings. In the drawings:
fig. 1 shows in perspective view an end region of a filament according to the invention;
FIG. 2 shows the filament of FIG. 1 in schematic cross-section;
FIG. 3 shows a further embodiment of the thread in a schematic cross section;
FIG. 4 shows a further design of the thread in a schematic cross section;
FIG. 5 shows a further design of the thread in a schematic cross section;
FIG. 6 shows a twisted filament in perspective view; and
fig. 7 shows a schematic view of the body of the toothbrush, with some of the bristle ends of the bristle sub-assembly shown in an enlarged view.
Fig. 1 shows an end region of a filament 10 according to the invention, the filament 10 extending along a longitudinal axis L. In the cross-section of the filament 10, the matrix 11 is shown with a radially inner base section 12. Eight radially protruding projections 13 are formed on the base portion 12, which projections 13 are arranged evenly distributed over the cross section of the base portion 12 and point-symmetrically with respect to a center point M of the cross section. The adjacent projections 13 are respectively arranged offset from each other by 45 ° in the circumferential direction.
The projections 13 extend along the entire length of the thread 10, so that the projections 13 form ribs 21 or ribs along the longitudinal axis L (fig. 1). Viewed in the circumferential direction of the thread 10, the base body 11 is designed as a concave curve in the transition region 19 between two adjacent projections 13, so that the base body 11 transitions continuously in the circumferential direction from one projection 13 to the other projection 13. Toothpaste is held in this transition zone 19 while brushing.
Four of the projections 13 are projections 13 of a headless component, the projections 13 of the headless component being arranged offset by 90 ° from one another in their orientation. The remaining four projections 13 each have a head part 15 at their radially outer ends 14. The ends 14 each have a radial recess 17 (see fig. 2) with an undercut, into which recess 17 an engagement element 18 of the head part 15, which engages in a form-fitting manner in the radial center point M of the cross section. The head part 15 is thereby connected to the projection 13 in a form-fitting manner. The head part 15 is additionally welded in a material-fit manner to the projection 13.
As shown in fig. 2, the radial end 14 of the projection 13 with the head part 15 has the same radial distance S from the center point M of the cross section as the radial apex 16 of the projection 13 of the headless part measured in the headless part1. This radial distance S1The value is about 100 μm. Due to the head part 15, the respective corresponding projection 13 has a greater radial distance S from the center point M of the cross section2. Distance S2In the embodiment of fig. 2 the value is about 110 μm. Radial distance S2And S1Difference S between3The value is about 20 μm (fig. 3). This value corresponds to the radial distance S of the projection 13 of the headless part according to fig. 21From about 5% to 25%, in particular about 10%. The head part 15 protrudes beyond, in particular by the dimension S3Projecting beyond the radial apex 16 of all of the projections of the headless member.
The base body 11 and in particular the base portion 12 and the projections 13 of the thread 10 are formed in one piece and consist of a first plastic material, for example a thermoplastic polyester such as PBT (polybutylene terephthalate).
The head part 15 is made of a second plastic material, for example a thermoplastic plastic material having a lower shore hardness than the first plastic material. Thereby achieving an improved cleaning effect when brushing teeth.
Fig. 2 shows a schematic cross section of the thread 10 according to fig. 1 with four headless projections 13 and four projections 13 with respective head parts 15 arranged alternately in the circumferential direction.
In a further embodiment according to fig. 3, the thread 10 has three projections 13 without head parts and three projections 13 with head parts 15 each. The projections 13 of the headless part alternate, viewed in the circumferential direction, with the projections 13 of the head part 15, so that the projections 13 of the headless part are arranged at an angle of 120 ° to one another. This applies correspondingly to the projection 13 with the head part 15.
Fig. 4 shows a further embodiment of the thread 10, which is similar to the embodiment of fig. 2, with the difference that each projection 13 is provided with a head part 15. The head part 15 is all composed of the same second plastic material.
Fig. 5 shows a cross-section of a filament 10 similar to that of fig. 4, the filament 10 having four head parts 15 of the type described which consist of a third plastic material, while the four remaining head parts 15 consist of a second plastic material. The filament 10 of fig. 5 is thus composed of three components, wherein a third plastic material (like the second plastic material) has a lower shore hardness than the first plastic material, but is a thermoplastic elastomer like the second plastic material. The cleaning properties of the filaments 10, in particular for removing plaque, can be adjusted by the choice of the second and third plastic materials.
Fig. 6 shows a perspective view of a filament 10 similar to the filament 10 according to fig. 1, the filament 10 according to fig. 6 differing from the filament 10 of fig. 1 in that the filament 10 is twisted at 150U/m along its longitudinal axis L such that the projection 13 extends helically about the longitudinal axis L together with the head 15.
Fig. 7 shows the head of a toothbrush 20 with a bristle arrangement 22 having a plurality of bristles consisting of the filaments 10 according to the embodiment of the invention according to fig. 1.

Claims (15)

1. A filament having a base body (11) composed of a first plastic material, the base body (11) extending along a longitudinal axis (L), wherein a cross section of the base body (11) has a radially inner base section (12) and a plurality of projections (13) projecting radially outward from the base section (12), the projections (13) being configured in one piece with the base section (12), characterized in that,
at least one projection (13) has a head part (15) at its radially outer end (14), the head part (15) being made of a second plastic material, which is different from the first plastic material of the base body (11).
2. The filament according to claim 1,
at least six projections (13), in particular at least eight projections (13), are provided.
3. The filament according to claim 1 or 2,
the projections (13) are arranged uniformly distributed in the circumferential direction of the base section (12).
4. The filament according to one of claims 1 to 3,
the projections (13) are arranged point-symmetrically with respect to a center point (M) of a cross section of the base section (12).
5. The filament according to one of claims 1 to 4,
the projections (13) each have a head member (15).
6. The filament according to claim 5,
the projections (13) with the head parts (15) and the projections (13) without head parts are arranged alternately in the circumferential direction of the base section (12).
7. The filament according to claim 5,
each projection (13) has a head part (15).
8. The filament according to one of claims 1 to 7,
the head part (15) is connected at least positively and/or materially to the projection (13).
9. The filament according to one of claims 1 to 8,
the radial apex (16) of the head part (15) projects radially beyond the radial apex of the projection (13).
10. The filament according to one of claims 1 to 9,
the first plastic material of the base body (11) is a thermoplastic polyester, in particular PBT (polybutylene terephthalate).
11. The filament according to one of claims 1 to 10,
the second plastic material of the head part (15) is a thermoplastic plastic material, in particular a thermoplastic elastomer, having a lower shore hardness than the first plastic material.
12. The filament according to one of claims 1 to 11,
all head parts (15) are made of the same material.
13. The filament according to one of claims 1 to 12,
at least one head part (15) is composed of a third thermoplastic plastic material, which is different from the first plastic material and the second plastic material.
14. The filament according to one of claims 1 to 13,
the monofilament is twisted about its longitudinal axis (L) such that the projection (13) and the at least one head part (15) are arranged helically in the longitudinal direction (L) of the filament.
15. A toothbrush having at least one filament according to any one of claims 1 to 14.
CN201980009645.2A 2018-01-29 2019-01-24 Filament and toothbrush with at least one corresponding filament Pending CN111770703A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102018000663.9A DE102018000663A1 (en) 2018-01-29 2018-01-29 Filament and toothbrush with at least one corresponding filament
DE102018000663.9 2018-01-29
PCT/EP2019/000019 WO2019145114A1 (en) 2018-01-29 2019-01-24 Filament and toothbrush with at least one corresponding filament

Publications (1)

Publication Number Publication Date
CN111770703A true CN111770703A (en) 2020-10-13

Family

ID=65365918

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201980009645.2A Pending CN111770703A (en) 2018-01-29 2019-01-24 Filament and toothbrush with at least one corresponding filament

Country Status (5)

Country Link
EP (1) EP3745911A1 (en)
CN (1) CN111770703A (en)
DE (1) DE102018000663A1 (en)
MX (1) MX2020007848A (en)
WO (1) WO2019145114A1 (en)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62170509A (en) * 1986-01-20 1987-07-27 Teijin Ltd Stretchable synthetic filament yarn and production thereof
DE19533815A1 (en) * 1995-09-13 1997-03-20 Coronet Werke Gmbh Toothbrush and process for its manufacture
US20080221618A1 (en) * 2007-03-09 2008-09-11 Gaoyuan Chen Co-extruded tissue grasping monofilament
US20110030160A1 (en) * 2009-08-06 2011-02-10 Mcneil-Ppc, Inc. Bristle configuration
DE102013007870A1 (en) * 2013-05-08 2014-11-13 Pedex Gmbh Monofilament of plastic and toothbrush bristle of a corresponding monofilament
DE102015205265A1 (en) * 2015-03-24 2016-09-29 Pedex Gmbh Plastic filament

Also Published As

Publication number Publication date
WO2019145114A1 (en) 2019-08-01
EP3745911A1 (en) 2020-12-09
DE102018000663A1 (en) 2019-08-01
MX2020007848A (en) 2020-10-28

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Application publication date: 20201013