WO2018043249A1 - Procédé de production de brosse à dents - Google Patents

Procédé de production de brosse à dents Download PDF

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Publication number
WO2018043249A1
WO2018043249A1 PCT/JP2017/030141 JP2017030141W WO2018043249A1 WO 2018043249 A1 WO2018043249 A1 WO 2018043249A1 JP 2017030141 W JP2017030141 W JP 2017030141W WO 2018043249 A1 WO2018043249 A1 WO 2018043249A1
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WO
WIPO (PCT)
Prior art keywords
toothbrush
gate
head
manufacturing
resin
Prior art date
Application number
PCT/JP2017/030141
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English (en)
Japanese (ja)
Inventor
良祐 蜂須賀
小林　利彰
Original Assignee
ライオン株式会社
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 ライオン株式会社 filed Critical ライオン株式会社
Priority to CN201780065668.6A priority Critical patent/CN109862806A/zh
Priority to KR1020197000898A priority patent/KR102425591B1/ko
Publication of WO2018043249A1 publication Critical patent/WO2018043249A1/fr

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    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46D—MANUFACTURE OF BRUSHES
    • A46D3/00—Preparing, i.e. Manufacturing brush bodies
    • A46D3/005—Preparing, i.e. Manufacturing brush bodies by moulding or casting a body around bristles or tufts of bristles
    • 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/42—Brushes
    • B29L2031/425—Toothbrush

Definitions

  • the present invention relates to a method for manufacturing a toothbrush.
  • This application claims priority on August 29, 2016 based on Japanese Patent Application No. 2016-166931 filed in Japan, the contents of which are incorporated herein by reference.
  • the head part may be made thin in order to improve operability and allow the entire oral cavity to be cleaned.
  • the head portion is formed of a polyacetal resin or polybutylene terephthalate resin, and the thickness of the head portion is set to 2 mm or more and less than 3 mm, thereby improving the oral operability and sufficient brush holding strength and A toothbrush that maintains the bending strength of the head portion is disclosed.
  • an amorphous resin material is often used.
  • the amorphous resin material is excellent in transparency but inferior in mechanical properties and strength quality compared to the crystalline resin material. Therefore, the specifications required for the above-mentioned thin head portion and ultra-fine neck portion are required. It was difficult to meet.
  • the present invention has been made in consideration of the above points, and an object of the present invention is to provide a method for manufacturing a toothbrush that can achieve both necessary mechanical properties, strength quality and transparency.
  • a head portion having a flocked surface on the front end side, a handle portion disposed on the rear end side from the head portion and including a gripping portion, and the flocked surface and the handle portion.
  • a method of manufacturing a toothbrush comprising: a step of filling a resin material through a gate portion disposed at a predetermined position, the neck portion being disposed between and a neck portion that is deformed by an external force applied to the head portion.
  • a method for manufacturing a toothbrush wherein a portion is arranged closer to the tip side than the grip portion.
  • the gate portion is disposed in the head portion.
  • a concave portion is disposed in a part of the head portion, and the gate portion is disposed in the concave portion.
  • a toothbrush in the method of manufacturing a toothbrush according to one aspect of the present invention, it is characterized in that at least the gate portion is covered with a second resin material.
  • the resin material is a hard resin and the second resin material is a soft resin.
  • the 1st part containing the connection part arrange
  • the resin material is amorphous.
  • FIG. 4 is an enlarged partial plan view of a head unit 2.
  • FIG. 4 is an enlarged partial cross-sectional view of a head unit 2.
  • FIG. 3 is a plan view showing a molded product in which a gate portion G extends in a length direction from a tip of a head portion 2.
  • FIG. 3 is a front view showing a molded product in which a gate portion G extends in a length direction from a tip of a head portion 2.
  • FIG. It is a figure for demonstrating the evaluation method of a bending elastic modulus.
  • FIG. 4 is an enlarged partial cross-sectional view of the head unit 2.
  • FIG. It is a top view which shows the molded product from which the gate part G extends in the length direction from the front-end
  • FIGS. 1 to 9 show one aspect of the present invention and do not limit the present invention, and can be arbitrarily changed within the scope of the technical idea of the present invention. Moreover, in the following drawings, in order to make each configuration easy to understand, the actual structure is different from the scale and number of each structure.
  • FIG. 1 is a top view of the toothbrush 1 which concerns on 1st Embodiment.
  • FIG. 1B is a front view of the toothbrush 1.
  • a toothbrush 1 shown in FIG. 1 includes a head portion 2 having a substantially square shape in plan view, a neck portion 4 extending to the head portion 2, and a handle portion 7 extending to the neck portion 4 (hereinafter, the head portion 2 and the neck portion). 4 and the handle portion 7 are also referred to as a handle body 10).
  • the head portion 2 is provided with a flocked portion (not shown) and a covering portion 30.
  • the handle portion 7 is provided with a soft elastic portion 6.
  • the handle body 10 is integrally formed in a long shape as a whole.
  • the handle body 10 is obtained by injection molding using a resin material as a material.
  • the handle body 10 excluding the soft elastic portion 6 and the covering portion 30 is formed of an amorphous hard resin that is transparent or translucent.
  • the amorphous hard resin include polystyrene resin (PS), acrylonitrile butadiene styrene resin (ABS), polyarylate resin, polycarbonate resin, acrylonitrile styrene resin (AS), and polyester resin.
  • PS polystyrene resin
  • ABS acrylonitrile butadiene styrene resin
  • AS acrylonitrile styrene resin
  • polyester resin polyester resin.
  • 1 type may be used independently and 2 or more types may be used in combination.
  • the flexural modulus of the material of the handle body 10 is preferably 1200 to 3000 MPa, and more preferably 1500 to 3000 MPa. If the flexural modulus of the handle body material is in the above range, the amount of deflection of the head can be set to an appropriate value, improving the oral cleaning power and operability, and improving the user's feeling of use. It leads to.
  • the length of the handle body 10 can be determined in consideration of operability and the like, and is, for example, 150 to 200 mm.
  • the head portion 2 has a substantially rectangular flat plate shape in which the length direction of the handle body 10 is long, and four apexes are cut off by a curve in plan view.
  • a plurality of flocking holes 22 are formed on one surface (flocking surface 20) of the head portion 2.
  • a hair bundle in which hairs are bundled is planted in the flock hole 22 to form a flocked portion composed of a plurality of hair bundles.
  • the direction parallel to the flocked surface 20 and orthogonal to the length direction of the handle body 10 is defined as the width
  • the direction orthogonal to the flocked surface 20 is defined as the thickness.
  • the side where the flocked surface 20 faces is the front surface
  • the side opposite to the side where the flocked surface 20 faces is the back surface.
  • the head portion 2 extends in the width direction from the tip toward the neck portion 4 in a plan view, then extends in the same width, then narrows in the width direction, and reaches the boundary P1 with the neck portion 4.
  • the boundary P1 is the end point of a curve forming a corner cut from the neck portion 4 in the plan view shape of the head portion 2 (that is, a position where the bending direction of the curve forming the corner cut changes (inflection). Point)).
  • the size of the head portion 2 can be determined in consideration of the operability in the oral cavity. If the maximum width of the head part 2 is too large, the operability in the oral cavity will be reduced, and if it is too small, the number of hair bundles to be implanted will be too small and the cleaning power will be easily impaired. For this reason, the width is, for example, 5 to 13 mm.
  • the thickness of the head part 2 is preferably 2.0 to 4.0 mm, more preferably 2.0 to 3.5 mm, and further preferably 2.5 to 3.2 mm. When the thickness of the head part 2 is equal to or more than the lower limit value, it is easy to suppress the strength of the head part 2 from being lowered, and durability is improved.
  • the thickness of the head part 2 means the minimum thickness of the head part 2.
  • the length of the head part 2 is appropriately determined within a range of 10 to 40 mm, for example.
  • FIG. 2 is an enlarged partial plan view of the head unit 2.
  • FIG. 3 is an enlarged partial cross-sectional view of the head unit 2.
  • illustration of the flock hole 22 is abbreviate
  • a gate portion G is disposed in the head portion 2 in the present embodiment.
  • the gate portion G is disposed on the side surface 2 a on the distal end side in the head portion 2.
  • the gate portion G is a region where a molten resin material is filled when the handle body 10 is injection-molded (injection molding). About the molded product which cooled and hardened the resin material with which it filled, since the gate part G protrudes from the handle body 10, it is cut
  • the gate mark after cutting is shown in the gate portion G in FIGS. As an example, the position on the back surface side of the gate portion G in the thickness direction is formed at the position of the parting line PL.
  • the covering portion 30 includes a side portion 30 a that covers the side surface 2 a of the head portion 2 and a bottom portion 30 b that covers a part of the back surface 2 b of the head portion 2.
  • the covering portion 30 is made of a soft resin.
  • the soft resin for example, those having a Shore hardness A of 90 or less are preferred, and those having a Shore hardness A of 50 to 80 are more preferred.
  • the soft resin include elastomers (for example, olefin elastomers, styrene elastomers, polyester elastomers, polyurethane thermoplastic elastomers, etc.) and silicone.
  • the thickness of the side portion 30a is formed larger than the protruding amount of the gate mark in the gate part G, and covers the gate mark.
  • the edges of the side portion 30a and the bottom portion 30b are formed with substantially arc-shaped curved surfaces, and the touch feeling is soft even when the head portion 2 is inserted into the oral cavity.
  • the soft elastic portion 6 is provided substantially flush with the handle portion 7 on each of the front surface side and the back surface side of the handle portion 7.
  • the soft elastic part 6 is arranged on the rear end side from the boundary P2 (details will be described later) with the neck part 4.
  • the soft elastic portion 6 is disposed in the grip portion 8 located on the rear end side of the predetermined distance from the boundary P2 that is the maximum width in the handle portion 7.
  • the soft elastic portions 6 provided on the front surface side and the back surface side are connected to each other through a connection portion (not shown) embedded in the handle portion 7.
  • the soft elastic part 6 is made of a soft resin.
  • the soft resin for example, the same resin as that of the covering portion 30 described above is used.
  • the shape of the flocking hole 22 is not particularly limited, and examples thereof include a circle such as a perfect circle or an ellipse, and a polygon such as a triangle or a rectangle.
  • the number of flock holes 22 is not particularly limited, and is 10 to 60, for example.
  • the diameter of the flock hole 22 is determined according to the desired thickness of the hair bundle, and is, for example, 1 to 3 mm.
  • the arrangement pattern of the flock holes 22 is not particularly limited, and may be any arrangement pattern such as a so-called grid pattern or zigzag pattern.
  • the hair constituting the hair bundle the hair whose diameter gradually decreases toward the hair tip (tapered hair), the hair whose outer diameter is substantially the same except for the rounded portion of the hair tip (straight hair), Examples include hair for which the hair tip is in the shape of a spatula, a sphere, a tip crack, or the like.
  • tapered hair is preferable.
  • the hair material examples include polyamides such as 6-12 nylon and 6-10 nylon, PET, PBT, polytrimethylene terephthalate (PTT), polyethylene naphthalate (PEN), polybutylene naphthalate (PBN) and the like.
  • Examples thereof include synthetic resin materials such as polyolefins such as polyester and polypropylene, olefin elastomers, and styrene elastomers. These resin materials may be used individually by 1 type, and may be used in combination of 2 or more type.
  • the bristle may have a multi-core structure having a core part and at least one or more sheath parts provided outside the core part.
  • the cross-sectional shape of the bristles is preferably a perfect circle, but is not necessarily limited to a true circle, and can be any shape depending on the intended use of the toothbrush 1.
  • the shape may be an ellipse, a polygon (for example, a triangle, a quadrangle, a pentagon, a hexagon, or the like), an irregular shape (for example, a star shape, a three-leaf clover shape, a four-leaf clover shape, or the like).
  • each hair is not particularly limited.
  • the cross section is a true circle
  • the hairs constituting the hair bundle 11 may all have the same thickness, or two or more different types of hairs may be combined.
  • the hair length is preferably 8 mm to 15 mm for adults and 6 mm to 12 mm for children, for example.
  • a plurality of hairs having different thicknesses may be used in combination depending on purposes such as a feeling of use, a feeling of cleaning, a cleaning effect, and durability.
  • the neck portion 4 connects the head portion 2 and the handle portion 7.
  • the neck portion 4 extends from the boundary P1 toward the handle portion 7 with substantially the same diameter, and then expands to reach the boundary P2 with the handle portion 7.
  • the boundary P2 is an end point of diameter expansion of the neck portion 4 (that is, a position at which a bending direction of a curve forming both ends of a straight line forming both edges of the widened portion or a curved line forming both edges of the widening portion changes in a plan view) (Inflection point)).
  • the width of the neck portion 4 is preferably 3.0 to 4.5 mm, more preferably 3.0 to 4.2 mm.
  • the width of the neck portion 4 is equal to or greater than the lower limit value, it is easy to suppress the strength of the neck portion 4 from being lowered, and the durability of the toothbrush 1 is enhanced. Furthermore, the toothbrush 1 does not become too soft, and a good feeling of use is easily obtained.
  • the operativity in the oral cavity of the toothbrush 1 is improved as the width
  • the width of the neck portion 4 is not constant, the width of the neck portion 4 means the minimum width of the neck portion 4.
  • the thickness of the neck portion 4 is preferably 3.0 to 4.5 mm, and more preferably 3.0 to 4.2 mm.
  • the thickness is equal to or more than the lower limit value, it is easy to suppress the strength of the neck portion 4 from being lowered, and the durability of the toothbrush 1 is enhanced. Furthermore, the toothbrush 1 does not become too soft, and a good feeling of use is easily obtained.
  • the operativity in the oral cavity of the toothbrush 1 is improved as the thickness of the neck part 4 is below the said upper limit. Further, the hair can reach every corner of the oral cavity, and the dirt removal effect in the oral cavity is further enhanced.
  • the thickness means the minimum thickness of the neck portion 4.
  • the minimum diameter of the neck portion 4 is preferably 3.0 to 4.5 mm, more preferably 3.0 to 4.2 mm.
  • the minimum diameter of the neck portion 4 is equal to or larger than the lower limit value, it is easy to suppress the strength of the neck portion 4 from being lowered, and the durability of the toothbrush 1 is enhanced. Furthermore, the toothbrush 1 does not become too soft, and a good feeling of use is easily obtained.
  • the operativity in the oral cavity of the toothbrush 1 is improved as the minimum diameter of the neck part 4 is below the said upper limit. Further, the hair can reach every corner of the oral cavity, and the dirt removal effect in the oral cavity is further enhanced.
  • the minimum diameter of the neck portion 4 means the smaller value of the width and thickness of the neck portion 4.
  • the length of the neck portion 4 can be determined in consideration of the length of the head portion and the like, for example, a length of 30 to 90 mm.
  • the length of the neck part 4 is not less than the above lower limit value, it becomes easy to reach the hair to every corner in the oral cavity, and the dirt removal effect in the oral cavity is further enhanced.
  • the length of the neck portion 4 is not more than the above upper limit value, the operability of the toothbrush 1 in the oral cavity can be further enhanced.
  • the manufacturing method of the toothbrush 1 includes a primary molding step in which a handle body 10 excluding the covering portion 30 and the soft elastic portion 6 is molded by injection molding using a first mold, and the handle body 10 molded in the primary molding step.
  • the covering portion 30 and the soft elastic portion 6 are integrally formed on the handle body 10 using the step of cutting and removing the gate portion G from the handle body 10 and the handle body 10 and the second mold from which the gate portion G has been cut and removed. Secondary molding step.
  • a first mold having a cavity corresponding to the shape of the handle body 10 is used.
  • a resin flow path that opens to the hollow portion in the gate portion G is formed, and a protrusion for forming a space in which the soft elastic portion 6 and the connection portion are disposed in the handle body 10. Is formed.
  • the molten hard resin supplied to the cavity in the first mold through the gate part G is sequentially filled in the head part 2, the neck part 4 and the handle part 7.
  • the gate part G is arranged in the head part 2
  • the molten hard resin (hereinafter referred to as molten resin) supplied from the gate part G is a neck part with a short flow length and a short flow length. 4 is filled.
  • the handle body 10 is manufactured as a molded product in which the gate portion G extends in the length direction from the tip.
  • the first mold in the present embodiment exemplifies a side gate system in which the gate extends from the molded product in the length direction (direction parallel to the parting surface). May be locally disposed, and a pinpoint method in which the molded product and the gate portion are separated by the mold opening operation of the first mold may be adopted.
  • the gate portion G extending from the handle body 10 is cut and removed.
  • the cutting of the gate portion G can be performed using an apparatus including a predetermined jig, a robot, and the like. Although it is preferable that the gate portion G is completely removed from the handle body 10, as shown in FIGS. 2 and 3, a part of the gate portion G remains as shown here.
  • the cover body 30 and the soft elastic part 6 are formed by filling the melted soft resin between the handle body 10 and an internal space in which the handle body 10 is accommodated.
  • the molten soft resin is filled in the molding space in which the handle body 10 is accommodated.
  • the cover portion 30 and the soft elastic portion 6 are integrally formed on the handle body 10. The toothbrush 1 made is manufactured.
  • an amorphous hard resin has a bulky molecular chain in the molecular skeleton, and it is difficult to take a regular molecular arrangement in the process of cooling and solidifying from a molten state. Therefore, for example, the molten resin supplied to the neck portion 4 is filled with high orientation as compared with the case where the molten resin is filled from the rear end of the handle portion 7. Therefore, the handle body 10 of the toothbrush 1 manufactured by the manufacturing method of the present embodiment improves the bending elastic modulus and fatigue strength of the neck portion 4 by increasing the orientation of the resin material.
  • the toothbrush 1 excellent in the external appearance which has the handle
  • coated part 30 has coat
  • coated part 30 is formed with soft resin, when a head part 2 is inserted in an oral cavity, a soft touch feeling is obtained.
  • Examples, Comparative Examples, Reference Examples 1-2 According to the specifications in Table 1, the bending elastic modulus and the fatigue strength of the neck portion of the handle body 10 having the head portions of Examples, Comparative Examples, and Reference Examples 1 and 2 were evaluated. The width, length, thickness and shape of the head part were all the same.
  • the head part of the example had 28 flock holes and the tip of the head part was the gate part.
  • the head part of the comparative example had 28 flock holes and the rear end of the handle part was a gate part.
  • the number of flock holes was set to 0, and the tip of the head part was used as a gate part.
  • the number of flock holes was only 12 located at both ends in the width direction, and the tip of the head part was a gate part.
  • ⁇ Neck fatigue strength evaluation method> Based on ISO20126, the fatigue strength was evaluated by the following procedure. (1) The toothbrush (handle body) to be evaluated is immersed in the chemical challenge solution for 24 hours or more in the head portion and the entire length of the handle body. (2) Fix to the fatigue strength tester at a position of 55 ⁇ 1 mm from the longitudinal center of the head. (3) Apply a load of 4.0 ⁇ 0.1 N to the center of the head part and push it down, and repeat until the neck part breaks at a speed of 50 ⁇ 10 times / min. The number of breaks of the neck portion was used as an index of fatigue strength. Evaluation was carried out with 8 samples. (4) A ratio based on the index of the comparative example was obtained.
  • the handle body in which the gate portion is arranged in the head portion has improved bending elastic modulus and fatigue strength of the neck portion as compared with the handle body in which the gate portion is arranged at the rear end of the handle portion. I was able to confirm. Moreover, from the evaluation of Reference Example 1 and Reference Example 2, it can be confirmed that the bending elastic modulus and the fatigue strength of the neck part are greatly improved by reducing the flow resistance of the molten resin filled through the gate part. It was.
  • FIG. 6 is an enlarged partial plan view of the head unit 2 according to the second embodiment.
  • FIG. 7 is an enlarged partial cross-sectional view of the head unit 2 according to the second embodiment.
  • the toothbrush 1 in the second embodiment is different from the toothbrush in the first embodiment in that a recess 25 is provided in a part of the head portion 2 and a gate portion G is disposed in the recess 25.
  • a concave portion 25 having a shape in which the side surface 2 a is omitted is provided on the back surface side of the tip of the head portion 2.
  • the recess 25 is formed in a concave shape having a substantially arc shape in a plan view.
  • the position on the surface side of the gate part G in the thickness direction is formed at the position of the parting line PL.
  • Other shapes are the same as those in the first embodiment.
  • a first mold having the position of the parting line PL as a mold alignment position is used.
  • a convex portion having a position and a shape corresponding to the concave portion 25 is provided, and a resin flow path opening in the hollow portion that constitutes the gate portion G is disposed on the convex portion.
  • the handle body 10 is manufactured as a molded product in which the gate portion G extends in the length direction from the concave portion 25 at the tip of the head portion 2.
  • the gate portion G extending from the handle body 10 is cut and removed.
  • the above-described second mold is used to fill the molding space with the molten soft resin.
  • the toothbrush 1 which has the coating
  • the gate trace is also generated when the gate portion G extending from the handle body 10 is cut in the cutting / removing process. Protruding from the outer contour of the can be suppressed. Therefore, in the manufacturing method of the toothbrush 1 of the present embodiment, in addition to obtaining the same operations and effects as those of the first embodiment, it is possible to suppress the gate trace from protruding from the covering portion 30, and the safety is high.
  • the toothbrush 1 can be manufactured.
  • the first portion 101 and the second portion 102 are connected via a connecting portion 103.
  • the first portion 101 includes the head portion 2, the neck portion 4, and the connecting portion 103.
  • the connecting portion 103 is disposed on the rear end side of the neck portion 4.
  • the connecting portion 103 is formed in a size included in the outer contour of the distal end of the handle portion 7 and is embedded and connected to the distal end side of the handle portion 7.
  • the connecting portion 103 is disposed on the front end side of the grip portion 8 in the handle portion 7.
  • the first portion 101 of the toothbrush 1 having the above-described configuration is molded by filling a molten resin with the rear end side of the connecting portion 103 as a gate portion G. Since the gate portion G extends from the neck portion 4, the distance from the neck portion 4 is short. For example, the gate portion G is supplied to the neck portion 4 as compared with the case where molten resin is filled from the rear end of the handle portion 7. The molten resin is filled with high orientation. Accordingly, the first portion 101 manufactured by the manufacturing method of the present embodiment improves the bending elastic modulus and fatigue strength of the neck portion 4 by increasing the orientation of the resin material.
  • the second mold other than the soft elastic portion 6 is filled by filling the molding space of the second mold containing the molded first portion 101 with the molten hard resin.
  • the portion 102 is formed as the handle body 10 integrally connected to the first portion 101 and the connecting portion 103 in the secondary forming step, and further, a forming space for forming the covering portion 30 and the soft elastic portion 6 is formed.
  • the cover portion 30 and the soft elastic portion 6 are molded integrally with the handle body 10. The toothbrush 1 made is manufactured.
  • the soft elastic portion 6 is integrally formed and the connecting portion 103 is inserted. Even if the second portion 102 having a hole is manufactured in advance, the connecting portion 103 is inserted into the hole, and the first portion 101 and the second portion 102 are integrally connected by an adhesive or the like. Good.
  • the configuration in which the gate portion G is disposed at the tip of the head portion 2 is illustrated, but the configuration is not limited to this configuration, and the side portion in the width direction of the head portion 2 is disposed.
  • the structure to distribute may be sufficient.
  • the gate portion is provided on the rear end side of the flocked hole 22 so that the flow resistance of the molten resin is not increased by the shaft-shaped protrusion provided in the first mold for forming the flocked hole 22. It is preferable to arrange G.
  • the present invention can be applied to a toothbrush manufacturing method.

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  • Manufacturing & Machinery (AREA)
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Abstract

L'objet de la présente invention est de fournir un procédé de production de brosse à dents avec lequel il est possible de combiner les propriétés mécaniques et la qualité de résistance nécessaires à une transparence. La brosse à dents comprend : une partie tête (2) ayant une surface d'implantation de poils (20) sur le côté pointe ; une partie poignée (7) comprenant une partie de préhension (8) et qui est positionnée davantage vers l'extrémité arrière que la partie tête ; et une partie col (4) qui est positionnée entre la surface d'implantation de poils et la partie poignée et qui est déformée par une force externe exercée sur la partie tête. Le procédé de production de brosse à dents comprend une étape de remplissage à l'aide d'un matériau de résine par l'intermédiaire d'une partie porte positionnée à une position prédéfinie. La partie porte est positionnée davantage vers la pointe que la partie de préhension.
PCT/JP2017/030141 2016-08-29 2017-08-23 Procédé de production de brosse à dents WO2018043249A1 (fr)

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CN201780065668.6A CN109862806A (zh) 2016-08-29 2017-08-23 牙刷的制造方法
KR1020197000898A KR102425591B1 (ko) 2016-08-29 2017-08-23 칫솔의 제조 방법

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JP2016166931A JP2018033510A (ja) 2016-08-29 2016-08-29 歯ブラシの製造方法
JP2016-166931 2016-08-29

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JP7413010B2 (ja) * 2019-12-26 2024-01-15 ライオン株式会社 歯ブラシ
KR20230066672A (ko) 2021-11-08 2023-05-16 안병무 칫솔

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JPS57111524U (fr) * 1980-12-27 1982-07-09
JP2002503971A (ja) * 1995-07-07 2002-02-05 スミスクライン・ビーチャム・コンシューマー・ヘルスケア・ゲゼルシャフト・ミット・ベシュレンクテル・ハフツング 歯ブラシ
WO2016035678A1 (fr) * 2014-09-01 2016-03-10 ライオン株式会社 Brosse à dents

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