WO1998027847A9 - Ameliorations relatives a la fabrication de brosses - Google Patents
Ameliorations relatives a la fabrication de brossesInfo
- Publication number
- WO1998027847A9 WO1998027847A9 PCT/US1997/022683 US9722683W WO9827847A9 WO 1998027847 A9 WO1998027847 A9 WO 1998027847A9 US 9722683 W US9722683 W US 9722683W WO 9827847 A9 WO9827847 A9 WO 9827847A9
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- elastomer
- head
- handle
- implement
- segments
- Prior art date
Links
- 229920001971 elastomer Polymers 0.000 claims abstract description 122
- 239000000806 elastomer Substances 0.000 claims abstract description 121
- 239000000463 material Substances 0.000 claims abstract description 39
- 239000004033 plastic Substances 0.000 claims abstract description 34
- 229920003023 plastic Polymers 0.000 claims abstract description 34
- 230000003370 grooming effect Effects 0.000 claims abstract description 25
- 238000000034 method Methods 0.000 claims abstract description 18
- 230000008569 process Effects 0.000 claims abstract description 17
- 239000011800 void material Substances 0.000 claims abstract description 11
- 238000000926 separation method Methods 0.000 claims abstract description 8
- 239000004743 Polypropylene Substances 0.000 claims description 15
- -1 polypropylene Polymers 0.000 claims description 14
- 229920001155 polypropylene Polymers 0.000 claims description 14
- 238000002347 injection Methods 0.000 description 18
- 239000007924 injection Substances 0.000 description 18
- 238000001746 injection moulding Methods 0.000 description 9
- 238000005452 bending Methods 0.000 description 7
- 238000000465 moulding Methods 0.000 description 5
- 230000004927 fusion Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 229920001169 thermoplastic Polymers 0.000 description 4
- 239000004416 thermosoftening plastic Substances 0.000 description 4
- 230000001680 brushing effect Effects 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000006731 degradation reaction Methods 0.000 description 3
- 239000004088 foaming agent Substances 0.000 description 3
- 229920002725 thermoplastic elastomer Polymers 0.000 description 3
- 239000004952 Polyamide Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229920002647 polyamide Polymers 0.000 description 2
- 229920000098 polyolefin Polymers 0.000 description 2
- 229920001875 Ebonite Polymers 0.000 description 1
- 229920002633 Kraton (polymer) Polymers 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000037123 dental health Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007730 finishing process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000012815 thermoplastic material Substances 0.000 description 1
- 238000009732 tufting Methods 0.000 description 1
Definitions
- a second, elastomeric component such as a thermoplastic elastomer
- the two component brush is typically now made by injection moulding, such as described in "Zahoransky's fully automatic two-colour mould", Brossa Press (1989).
- the process typically involves a first moulding step in which a thermoplastic body is made, incorporating voids to accept the elastomer.
- the elastomer is injected into the voids where it will typically become partially mechanically anchored, on cooling and setting, and also fused to the thermoplastic body.
- the demands on the joint between the thermoplastic body and the elastomer are, typically, not high.
- a foaming agent such as Hydrocerol HP20DP from Boehringer- Mannheim is mixed with the polypropylene at a level of from about 1% to about 3%, preferably from about 1.5% to about 2.5%, by weight of the polypropylene.
- the foaming agent assists the flow of the polypropylene during moulding and, in particular, helps to ensure uniform formation ' of hinges, where used.
- the handle itself is generally rigid and may be of a shape which is conventional in the manufacture of toothbrushes.
- the handle may comprise a neck portion which is more flexible than the rest of the handle, for example by inclusion of a flexible joint as described herein.
- the elastomer is stretched by linear deflection, bending or torsional movements of a segment relative to the adjacent segment or handle. Since, for some geometries of segment-segment or segment-handle connections, or for bending or torsional movements of one segment relative to its neighbour, there will be varying extents of elastomer stretching across an interface, care is required in measuring partial detachment. In such cases of differential elastomer extension, at each point on any one interface to be measured, the stretching should be measured along a line drawn through the elastomer which is perpendicular to the interface at the point where separation is to be determined, when the implement is in its rest, unstressed state. In bending or torsional modes it may be that this line will deviate from the perpendicular as one segment is moved relative to the other.
- toothbrushes according to this invention can be used for cleaning the teeth by an entirely conventional tooth brushing hand action, preferably in a manner recommended by dental health authorities.
- the implement can also be an electrically driven toothbrush.
- Fig. 1 is a perspective view of a toothbrush according to the invention. Some of the bristles are omitted for the sake of clarity.
- Fig. 2 is a partial side view of the head of a toothbrush according to the invention.
- a toothbrush 1 has a head 2 which is co-moulded with the handle 5, the head being concave along its longitudinal axis on the top face 3. Voids 13 in the handle are filled with elastomer to provide hand grips.
Abstract
L'invention porte sur le procédé de fabrication de l'articulation souple élastique en deux parties d'un article pour soins personnels consistant à injecter un élastomère dans une cavité (13) formée dans un manche (5) de plastique ou dans une tête (2) à une température d'au moins 245 °C, ce qui fusionne l'élastomère et le plastique et crée l'articulation souple élastique. L'invention porte également sur un article pour soins personnels comportant une articulation souple élastique reliant un matériau plastique présentant un point de ramollissement Vicat de moins de 245 °C à un élastomère, ledit élastomère étant fusionné au matériau plastique de manière à pouvoir être étiré jusqu'à 120 % de sa longueur à l'état non étiré sans provoquer de séparation entre l'élastomère et le plastique. L'invention assure une adhérence améliorée entre l'élastomère et le plastique permettant à l'articulation de mieux supporter les flexions répétitives. La durabilité de l'article s'en trouve améliorée.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002274044A CA2274044A1 (fr) | 1996-12-24 | 1997-12-12 | Ameliorations relatives a la fabrication de brosses |
| EP97954082A EP0971610A1 (fr) | 1996-12-24 | 1997-12-12 | Ameliorations relatives a la fabrication de brosses |
| US09/331,815 US6514445B1 (en) | 1996-12-24 | 1997-12-12 | Brush making |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9626862.8 | 1996-12-24 | ||
| GBGB9626862.8A GB9626862D0 (en) | 1996-12-24 | 1996-12-24 | Improvements in brush making |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO1998027847A1 WO1998027847A1 (fr) | 1998-07-02 |
| WO1998027847A9 true WO1998027847A9 (fr) | 1998-11-26 |
Family
ID=10805013
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/US1997/022683 WO1998027847A1 (fr) | 1996-12-24 | 1997-12-12 | Ameliorations relatives a la fabrication de brosses |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP0971610A1 (fr) |
| CN (1) | CN1127312C (fr) |
| CA (1) | CA2274044A1 (fr) |
| CZ (1) | CZ293029B6 (fr) |
| GB (1) | GB9626862D0 (fr) |
| HU (1) | HUP0000165A3 (fr) |
| WO (1) | WO1998027847A1 (fr) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BR9813227A (pt) | 1997-09-26 | 2000-08-29 | Smithkline Beecham Gmbh & Co | Escova de dentes |
| DE19816098A1 (de) * | 1998-04-09 | 1999-10-14 | Coronet Werke Gmbh | Reinigungsbürste, insbesondere Zahnbürste |
| GB2338648A (en) * | 1998-06-25 | 1999-12-29 | Sophia Basi | Cleaning device with resilient head mounting |
| GB0014495D0 (en) * | 2000-06-15 | 2000-08-09 | Smithkline Beecham Gmbh & Co | Process |
| US7921499B2 (en) | 2004-07-12 | 2011-04-12 | Trisa Holding Ag | Method and device for producing a toothbrush by the two-component or multi-component injection-molding process |
| IN2014DN07048A (fr) | 2012-03-09 | 2015-04-10 | Colgate Palmolive Co | |
| CN104552756A (zh) * | 2014-12-31 | 2015-04-29 | 黎初胜 | 一种牙刷柄的制造方法 |
| TWI753888B (zh) * | 2016-03-09 | 2022-02-01 | 日商獅子股份有限公司 | 牙刷 |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4734230A (en) * | 1986-07-24 | 1988-03-29 | Ex-Cell-O Corporation | Method and appartus for forming composite products |
| GB8807673D0 (en) * | 1988-03-31 | 1988-05-05 | Lingner & Fischer Gmbh | Novel article |
| DE3840136C1 (fr) | 1988-11-29 | 1990-05-17 | Blendax Gmbh, 6500 Mainz, De | |
| DE3923495C1 (fr) * | 1989-07-15 | 1991-01-24 | M + C Schiffer Gmbh, 5466 Neustadt, De | |
| SG49902A1 (en) | 1991-03-27 | 1998-06-15 | Lingner & Fisher Gmbh | Toothbrush having a flexibility linked zone in its head |
| GB9106511D0 (en) | 1991-03-27 | 1991-05-15 | Lingner & Fischer Gmbh | Novel article |
| US5398369A (en) * | 1994-07-07 | 1995-03-21 | Chesebrough-Pond's Usa Co., Division Of Conopco, Inc. | Toothbrush with pliable pressure pad |
| GB9414140D0 (en) | 1994-07-13 | 1994-08-31 | Procter & Gamble | Toothbrush |
-
1996
- 1996-12-24 GB GBGB9626862.8A patent/GB9626862D0/en active Pending
-
1997
- 1997-12-12 CN CN97180905A patent/CN1127312C/zh not_active Expired - Lifetime
- 1997-12-12 HU HU0000165A patent/HUP0000165A3/hu unknown
- 1997-12-12 CZ CZ19991998A patent/CZ293029B6/cs not_active IP Right Cessation
- 1997-12-12 EP EP97954082A patent/EP0971610A1/fr not_active Withdrawn
- 1997-12-12 WO PCT/US1997/022683 patent/WO1998027847A1/fr not_active Application Discontinuation
- 1997-12-12 CA CA002274044A patent/CA2274044A1/fr not_active Abandoned
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