CN101516232A

CN101516232A - Toothbrush

Info

Publication number: CN101516232A
Application number: CNA2007800343758A
Authority: CN
Inventors: 袴田佑辅; 小林利彰; 加藤孝夫
Original assignee: Lion Corp
Current assignee: Lion Corp
Priority date: 2006-09-19
Filing date: 2007-09-19
Publication date: 2009-08-26
Anticipated expiration: 2027-09-19
Also published as: JPWO2008035713A1; KR20090057013A; JP5066527B2; CN101516232B; WO2008035713A1; KR101320827B1

Abstract

The present invention relates to a toothbrush in which the bristles are less likely to have mechanical damage such as cracks and bends and that clearly indicates the time of toothbrush replacement by the degree of spread of the bristles. The toothbrush (10) has tufts (15) inserted into a tuft insertion surface, and the tufts (15) are each formed by binding bristles (1) made of a polytrimethylene terephthalate resin. Recesses (2) are formed in the surface of a bristle (1). The minimum cross-sectional area (S1) of the bristle (1) at the position where a recess (2) is formed is 40 to 80% of the maximum cross-sectional area (S2) of the bristle (1).

Description

Toothbrush

Technical field

The present invention relates to a kind of toothbrush, it uses by poly terephthalic acid 1, the usefulness hair that ammediol ester (PTT) resin constitutes.

The application advocates priority 2006-252676 number to the Japanese patent application of application on September 19th, 2006, quotes its content at this.

Background technology

Toothbrush usually use synthetic resin such as nylon resin (6-12 nylon, 6-10 nylon) or polybutylene terephthalate (PBT) resin with hair, part is also used as natural mao of bristles.

In addition, be poly terephthalic acid 1 as use being arranged by mylar in recent years with the hair motion, the toothbrush of the monofilament that ammediol ester (PTT) resin constitutes (for example, with reference to patent documentation 1, patent documentation 2, patent documentation 3) and by the poly terephthalic acid 1 that has both the transparency and flexibility, durability, the toothbrush (for example, with reference to patent documentation 4, patent documentation 5) that ammediol ester class monofilament constitutes.As using the toothbrush of PTT resin because bending is restorative and flexibility is good with hair, so compare, be not easy to scatter with hair with the situation of using nylon resin or PBT resin, can keep high cleaning power for a long time.

But, use by the PTT resin constitute with the toothbrush of hair owing to be not easy to scatter with hair, the replacement time of toothbrush is indeterminate, thus be used for a long time, and to the power that mao is continuously applied repeatedly, so rupture with mao mechanicalness of often riving or fractureing.

For provide by the PTT resin constitute with the toothbrush that do not rupture of hair, a kind of toothbrush is provided, the synthetic resin system monofilament that this toothbrush will be made of PTT resin and polyester resin is as with mao (with reference to a patent documentation 6).

In addition, owing to use the toothbrush that constitutes by the PTT resin to show deterioration state with hair, so motion a kind of technology, this technology will be used for making double-deck core sheath structure with the PTT hair of hair, with mao color or the concentration of color with abrasion change (with reference to patent documentation 7).The technology of patent documentation 7 records just can not known the replacement time of toothbrush according to the opening degree of burr.

On the other hand, as toothbrush with hair, around bristle and to cut off the region-wide formation of end face concavo-convex, cleaning teeth and massage gum (with reference to patent documentation 8) well.In addition, as the toothbrush that uses the PTT resin, also have around the core that constitutes by ptt fiber, to plant the toothbrush (with reference to patent documentation 9) that inweaves the system knob bristlelike monofilament of filament by the processing of system knob.

Patent documentation 1:(Japan) spy opens flat 8-173244 communique

Patent documentation 2:(Japan) the international brochure that discloses No. 01/75200

Patent documentation 3:(Japan) special table 2001-511379 communique

Patent documentation 4:(Japan) spy opens the 2006-2256 communique

Patent documentation 5:(Japan) spy opens the 2006-37273 communique

Patent documentation 6:(Japan) spy opens the 2005-270366 communique

Patent documentation 7:(Japan) spy opens the 2005-103184 communique

Patent documentation 8:(Japan) open clear 61-177027 communique in fact

Patent documentation 9:(Japan) spy opens the 2004-81647 communique

But, possess and use the toothbrush with hair of present PTT resin to be not easy to scatter and long-time the use by the useful hair of institute sometimes, thereby can not fully prevent the mechanicalness of riving or fractureing fracture with hair.

Summary of the invention

The present invention develops in view of described point, and its purpose is to provide a kind of toothbrush, and the mechanicalness of riving or fractureing that this toothbrush is not easy to take place with hair ruptures, and according to the degree of scattering with hair, the replacement time of clear and definite toothbrush.

The present inventor has carried out following research to PTT with the mechanicalness fracture of hair, has found out toothbrush of the present invention.

That is,,,, can use for a long time so compare with the situation of using nylon resin or PBT resin owing to crooked restorative being difficult to of Mao Yingao opens planting on the toothbrush under the situation of PTT with hair.Therefore, sweeping act on the hair load also for a long time.Usually, toothbrush be rectilinear form with hair, act on stress with hair during sweeping and concentrate on root (planting), the big load of using mao of root effect in the root portion of being close to of planting mao platform with hair.Therefore, the mechanicalness of riving or fractureing with hair breaks at the root generation of using hair.

In addition,, consider the replacement time of clear and definite toothbrush, supervise the replacement of toothbrush, before PTT gives birth to the mechanicalness fracture with hair, replace toothbrush in order to prevent the mechanicalness fracture of PTT with hair.For the replacement time of clear and definite toothbrush, can consider to attenuate, scatter easily with hair, from visually judging with the hair footpath.But, when attenuating merely, limbering up with hair with when footpath hair, sweeping power reduces or with the intensity reduction of hair, with mao often fractureing.

So, the present inventor has constantly discovered toothbrush of the present invention with keen determination, this toothbrush with PTT with the hair shape do the origin cause of formation brush teeth act on the hair stress not only concentrate on mao root, and with the degree of scattering (mao portion of planting scatter rate) of hair for and with the corresponding shape of deterioration state of hair, guarantee sufficient durability thus, make the replacement time of toothbrush clear and definite simultaneously, thereby can prevent the mechanicalness fracture of PTT with hair.

Toothbrush of the present invention plants pieces in planting hair side, this pieces is to tie up and form with hair what be made of the PTT resin, it is characterized in that, described with the hair the surface be formed with a plurality of recesses, be formed with described recess the position described with the hair minimum sectional area be described with mao maximum secting area 40%～80%.

Like this, when with the surface of hair when being formed with a plurality of recess, the stress that acts on during sweeping with hair is distributed to a plurality of recesses, thus the stress during sweeping can not concentrate on mao root, compare with the situation that does not form recess, can alleviate the stress that acts on the root of hair on surface with hair.

In addition, when with the surface of hair when being formed with recess, the stress to the recess of service load scatters easily during because of sweeping with hair, therefore can be from replacement time of clear and definite toothbrush visually, and can supervise giving birth to mechanicalness with hair and replace toothbrush before rupturing.Therefore, according to the present invention, be not easy to rive or fracture with hair, and can realize the toothbrush that the replacement time is clear and definite.

In addition, the described recess of toothbrush of the present invention is 0.3mm～1.2mm in the described spacing of prolonging direction with hair, is that 0.1mm～0.8mm, the degree of depth are 0.1 times～0.5 times with the hair footpath in the length of described prolonging direction.

Spacing, the length of prolonging direction, the degree of depth of described recess are made as described scope, thus, become PTT with hair plant a mao portion better toothbrush of rate that scatters, and can guarantee high mechanical strength.

In addition, saidly be meant the meaning of the diameter when being shaped as circle with gross cross-sectional with hair footpath at this, when being shaped as regular polygon such as equilateral triangle or square with gross cross-sectional, expression length on one side.

According to the present invention, concentrate by alleviating the stress that acts on the root of using hair, can prevent riving or fractureing with hair.And, visually also can clearly replace the time.

Description of drawings

Fig. 1 is the side view of an example of expression toothbrush of the present invention;

Fig. 2 be amplify expression constitute toothbrush shown in Figure 1 with 1 amplification stereogram in the hair;

Fig. 3 is the side view with hair shown in Figure 2;

Fig. 4 is the profile with hair shown in Figure 2, is the profile that is formed with the part of recess.

Description of symbols

1 usefulness hair

2 recesses

10 toothbrushes

11 heads

12 plant hair side

13 handle portion

15 pieces

21,22 recess unit

The A spacing

The length of B prolonging direction (width)

The C degree of depth

D uses hair footpath (thickness)

The E central shaft

The S1 minimum sectional area

The S2 maximum secting area

The specific embodiment

Below, the embodiment that present invention will be described in detail with reference to the accompanying.In addition, the present invention is not limited to the embodiment of following explanation.

Fig. 1 is the side view of an example of expression toothbrush of the present invention; Fig. 2 be amplify expression constitute toothbrush shown in Figure 1 with 1 amplification stereogram in the hair; Fig. 3 is the side view with hair shown in Figure 2; Fig. 4 is the profile that is formed with the part of the recess of using hair shown in Figure 2.

Toothbrush 10 shown in Figure 1 possesses: head 11, and it has the hair side of planting 12; Handle portion 13, it extends 11 rear end from the head.Handle portion 13 is used to control toothbrush 10, can be the suitable shape arbitrarily of using the sweeping operation of toothbrush 10.

Head 11 and handle portion 13 for example can form by resins such as hard resin are integrally formed.In addition, for constituting the resin of handle portion 13,, also can at least a portion use soft resins such as elastomer in order to be easy to control.

Material as head 11 and handle portion 13, specifically, can be used alone or as a mixture raw material such as polystyrene resin (PS), acrylic resin (PP), pet resin (PET), acrylonitrile-1,3-butadiene styrene resin (ABS), cellulose propionate resin (CP), polyarylate resin, saturated polyester resin (PCTA, PCTG), polycarbonate resin (PC), acrylonitrile-styrene resin (AS), polyacetal resin (POM), polybutylene terephthalate (PBT) (PBT), Biodegradable resin.In addition, also be preferably these resins each other or the polychrome shaping handle that is formed by combining with thermoplastic elastomer (TPE), silicones.In addition, the material of head 11 and handle portion 13 is not subjected to the restriction of above-mentioned record.

Plant a plurality of pieces 15 that form with hair of tying up on the hair side 12 planting of head 11.As the fur planting method that pieces 15 is fixed in head 11, can fix by the method for present technology, for example, can be undertaken by method such as following, promptly, the horizontal line that utilizes horizontal line (except that metals such as brass, stainless steel, to give birth to the anti-avulsion parts such as rigid plastics of decomposability plastics) that hair is planted in pieces 15 doublings is planted hair; Utilize of the end combination of means such as heat, under the state in the joint portion is in metal pattern, fill as the resin of head 11 and the injection surface of fixing and plant hair (for example, the spy opens clear 61-268208, the flat 9-512724 of special table) pieces 15; Utilize means such as heat that the thermosolization that one end and the head 11 of pieces 15 carries out melted join is fixedly planted hair (for example, the spy opens clear 60-241404).

In addition, be formed at the shape of planting mao cave of planting on the hair side 12 and also can be common circle and square hole or substantially elliptical, roughly Long Circle, the major diameter shape different such as rectangle roughly with minor axis.In addition, plant the common assortment in mao cave and become clathrate or zigzag, can suit to select to plant the combination of mao combination of cave shape and assortment according to the purpose function.In addition, the design of the shape of head 11, size all is not subjected to any restriction, for example, as the minimum thickness of head 11, can be by fur planting method that uses horizontal line or the fur planting method that does not use horizontal line, make the thickness of some different 2mm～6mm sizes.

Constitute toothbrush 10 shown in Figure 1 pieces 15 with hair 1 by poly terephthalic acid 1, ammediol ester (PTT) resin constitutes.Can in the scope that characteristic with hair 1 is not produced big loss, carry out upgrading as monofilament with hair 1.Particularly, for example also can in as the PTT resin of monofilament, suit to cooperate the stabilization agent, fire retardant, filler, surface lubricant, charged preventor, sterilization material upgradings such as (anti-biotic materials) material of one or more relatively hots or light, other hard resin or elastomer etc., or monofilament is applied.

In addition, also can use transparent (native state) former state with hair with hair 1, also can be used as utilize pigment or dyestuff and form transparent be painted with using hair or opaque coloured (containing white) with hair, consider the commodity of outward appearance of toothbrush 10 and suitable selection.Transparent with hair, transparent class painted with hair, opaque coloured (containing white) with mao also can in pieces unit or pieces, be used in combination as required these two kinds or more than it.

Transparent class is painted painted with mao can making by following common employed method etc. with hair etc. with hair or opaque coloured (containing white), that is, the resin during to spinning itself carries out method of colouring; Carry out method of colouring from the surface after the spinning or in company with spinning process.In addition, also can cut-out (the カ Star トピ one ス) state (bundle with staple length of 25～35mm size) before toothbrush 10 being planted hair or planting hair back only to mao 1 fore-end or with mao 1 whole carry out painted.

When on the surface with hair 1 recess 2 being set, the stress that acts on during sweeping with hair concentrates on recess 2, therefore can alleviate the stress that acts on hair 1 root, and scatters easily with hair 1.But, be not just passable in order fully to prevent with hair 1 riving or fractureing as long as recess 2 is set on surface with hair 1, the minimum sectional area S1 with hair 1 that need be formed with the position of recess 2 uses 40%～80% of mao 1 maximum secting area S2.

As shown in Figure 4, this said minimum sectional area S1 be meant recess with respect to the length direction of hair when vertically blocking minimum with gross cross-sectional long-pending (among the figure, oblique line portion).In addition, maximum secting area S2 is that extrapolation is attached at amassing with gross cross-sectional that mao line that the outermost layer of the recess that upward forms front and back obtains obtains.

When 40% ((S1/S2) * 100＜40 (%)) of the not enough maximum secting area S2 with hair 1 of minimum sectional area S1, the mechanical strength that forms the part of recess 2 significantly descends, and can not bring into play as the intensity with the script of hair 1, and bending strength significantly descends.In addition, what cause because of brushing teeth is identical with the hair degree with common nylon with scattering of hair 1, and PTT disappears with the good crooked durability that hair has.On the other hand, when minimum sectional area S1 surpasses 80% ((S1/S2) * 100＞80 (%)) of the maximum secting area S2 that uses hair 1, because the good crooked durability of PTT resin, so what cause because of brushing teeth is insufficient with opening of hair 1, the time of not only replacing is indeterminate, and continues fractureing sometimes with hair of use.

In addition, the preferred 0.3mm～1.2mm of spacing A of recess 2 shown in Figure 3, more preferably 0.5mm～1.0mm.In addition, at the spacing A of this so-called recess 2, be meant with the distance between the adjacent recess 2 of the prolonging direction of hair 1.In addition, the distance between the recess 2 that what is called is adjacent is meant the meaning with the distance between the prolonging direction center of hair 1 of recess 2.

In addition, preferred 0.1mm～0.8mm, more preferably 0.2mm～0.5mm of the length B of the prolonging direction of recess 2 (width).

In addition, the line that obtains from the outermost layer that links Fig. 3 and recess 3 shown in Figure 4 is preferably with hair footpath D 0.1 times～0.5 times to the degree of depth C of the distance of the lowest point of recess 2, more preferably 0.1 times～0.3 times.

In addition, as thickness, be 3～10mil (0.076～0.254mn) with hair 1, preferred 5～8mil (0.125～0.203mn), consideration usability, sweeping sense, cleaning effect, durability etc. as the hair of using that constitutes a toothbrush, can make up a plurality of hairs of using that utilize thickness different.Particularly on planting hair side 12, dispose in a plurality of specifications of planting mao cave the hardening or to change (thickness, material, length, look, cross sectional shape) also preferred at usability, differences in appearance vpg connection gradually of the intensity of using hair towards central authorities from the outside.

In addition, the cross sectional shape with hair also can be circle, ellipse or polygons such as triangle, quadrangle; Lobate isoline class, the class of a curve of star-like, three leaves or four leaves make up the unsetting of straight line and curve in addition.

To be the manufacture method of such monofilament with hair 1 there is no particular limitation, the method etc. that for example can utilize common co-extrusion pressure to make monofilament is made.In addition, also there is no particular limitation to the formation method of the recess 2 that possesses with hair 1 surface, for example before or after extension process when making monofilament or the malleableize operation etc., for example up and down or about relatively configuration have the cylinder that the protuberance of コ word shape is seen in the cross section corresponding with the shape of recess 2, the cylinder chien shih monofilament of configuration relatively by and can form.In addition, recess 2 also can be implemented heat treatment on one side when making monofilament pass through between the cylinder of relatively configuration, make monofilament pass through to form between the relative cylinder that disposes on one side.

In addition, the formation position for recess 2 is not limited to above-mentioned embodiment.For example, in the above-described embodiment, possess two

row recess unit

21,22 on the surface with hair 1, the recess unit also can be row.In addition, in the above-mentioned embodiment, two

row recess unit

21,22 are with respect to hair 1 central shaft E balanced configuration, but also can be configured to become the adjacent recess center of recess unit 22 with the position of the recess of the recess unit 21 of mao 1 prolonging direction.

With the shape of the recess 2 of hair 1 also can be to see コ word shape or V word shape or U word shape, C word shape with the cross section of the prolonging direction of hair 1.In addition, both can be identical with the shape of the hair 1 whole recess that has, also can be partly or entirely difference.In addition, the recess with hair also can be the groove that is provided with in full week of continuing to use hair.In addition, especially preferably continue to use the total length of hair with the recess of hair and implement, but as long as according to the size of recess, with the cross sectional shape of hair, with suitable selections such as Mao Jing.

Have in formation under the situation of recess of such shape, as making the cylinder that passes through for monofilament with hair, by use have with hemispherical or roughly polygon (rectangle, triangle), roughly Long Circle etc. is wanted the cylinder of the corresponding recess of shape of the recess that forms, just can equally with above-mentioned embodiment form with hair 1.

In addition, as the surface possess recess 2 with hair 1 other example, for example can enumerate, in spinning with hair 1 o'clock, in major ingredient, add inorganic matter in advance, bestow arbitrarily recess and form utilizing it to make surface that spinning forms separate out the surface that is partly dissolved and obtains with hair with hair.

And, also can burr be done into a cone shape by using hair be dissolved in the chemical method of acid or alkali medicament or on toothbrush, planting the back Ginding process that burr is carried out mechanical lapping of hair etc.As Ginding process, for example can enumerate, use by around the rotation of first rotating shaft and support the abrasive body of the bearing of first rotating shaft along the rotation of second rotating shaft, be processed into cutting of bristle and decide face and plant the method for the manufacturing installation of the cone-shaped that slides between the face.

In addition, so-called concave depth when burr is processed into cone-shaped is meant from binding to be formed at line that the outermost before and after the recess of tapered portion the obtains distance to the lowest point of recess.

In addition, manufacture method by different toothbrush 10, to tie up the regulation radical with hair after the spinning, become the state that batches to spool, or be cut into certain length, on straight line, be bundled into diameter, after becoming the state of by paper or winding film from number cm to the 10cm size, owing to can further reduce residual deformation, for example can carrying out from several minutes to a few days under 60 ℃～160 ℃, carry out off line heat treatment with hair.

In addition, the burr of the end of toothbrush 10 (or profile) shape and can set arbitrarily with staple length for example both can be single plane shape, mountain peak shape, concaveconvex shape, also can be different shapes such as the outside and inboard, leading section and rearward end.

Below, enumerate embodiment and further describe the present invention, but the invention is not restricted to these embodiment.

(embodiment 1～embodiment 10, comparative example 1～comparative example 3)

A pieces that forms with hair of tying up the PTT resin formation shown in table 1 or the table 2 is planted having 23 hair sides of planting of planting mao cave, produce the toothbrush that head and handle portion are made of the PCTA resin.

(comparative example 4)

Except that used by nylon resin constitute with the hair, all the other are identical with embodiment 1～embodiment 10, comparative example 1～comparative example 3, manufacture toothbrush.

The expression of table 1 or table 2 is used for the profile of the side view with hair, the arrow locations shown in the side view on the toothbrush of embodiment 1～embodiment 10, comparative example 1～comparative example 4, ratio ((S1/S2) * 100 (%)) that minimum sectional area S1 accounts for maximum secting area S2, with nominal dimension (spacing, the degree of depth, width), with hair directly.In addition, on the profile of table 1 and table 2, the area of the part that oblique line is represented is minimum sectional area S1, and the part that enclosed with dashed lines is come is maximum secting area S2.

[table 1]

[table 2]

Utilize the toothbrush of embodiment 1～embodiment 10, comparative example 1～comparative example 4, carried out (1) shown below and used hair endurancing and (2) functional evaluation.It is as a result shown in the table 3.

[table 3]

(1) with the hair endurancing

The toothbrush of embodiment 1～embodiment 10, comparative example 1～comparative example 4 is put on the model durability test machine, as follows, carried out the test that mao portion of planting scatters rate and breaks with trichatrophia.Test method is, the head of toothbrush is positioned on the metal ripple plate, uses that hair front end and ripple plate are surperficial to be contacted, and with relative configuration of ripple plate horizontal line, the mass-impregnation that makes the head of toothbrush and ripple plate is in 35 ℃ warm water.And, be applied with at head under the state of 400g load toothbrush, make the wave line of propagation of head, move back and forth 100,000 times with shuttle speed 150 times/minute, sweeping stroke 40mm and carry out sweeping, to the scatter rate and estimate of a mao portion of planting of toothbrush with trichatrophia is disconnected towards the direct wave plate.

＜plant mao portion rate of scattering 〉

Before sweeping (before the hair endurancing), measured plant hair in head plant hair group plant mao portion's width (with respect to the full width with hair group's burr position of the right angle orientation of handle length direction), behind sweeping stipulated number on the model test machine (100,000 times), measured once more and planted mao portion's width, remove its difference with mao portion's width of planting before the sweeping, take advantage of 100 times again, mao portion rate of representing for percentage of scattering of planting.In addition, plant mao portion's width and carried out instrumentation in the position that comprises towards outermost pieces.In addition, planting mao portion rate of scattering also estimates according to following benchmark.

Planting mao portion scatters rate (%)=((planting after the sweeping mao portion's width of planting before mao portion's width-sweeping)/(planting before the sweeping mao portion's width)) * 100

○：30％～60％

△: 20%～30% or 60%～80%

*: less than 20% or greater than 80%

(disconnected) with trichatrophia

After the stipulated number sweeping, the generation that visual observations fractureed with having or not of hair root portion, and the following benchmark of foundation is estimated.

Zero: do not fracture with hair

*: fracture with the hair life

(2) functional evaluation

Whether relevant toothbrush after utilizing the bristle endurancing to finish implemented 7 step function evaluations by 20 of professional participants to the hair open mode of toothbrush and replacement time, and estimated according to following benchmark.

1: do not have related 2 fully: quite do not have association

3: not too relevant 4: relevant still do not have association not to be easy to make commentary

5: some association 6 is arranged: quite relevant

7: very relevant

Zero: equalization point is more than 6

△: equalization point 4～6

*: below 4

Overall merit is that benchmark is judged to plant scatter rate, result disconnected with trichatrophia, functional evaluation of mao portion.

Zero: all be " zero "

△: evaluation is that " zero " or " △ " are not " * "

*: have in any " * "

Shown in table 1～table 3, be formed with a plurality of recesses on surface with hair, in the minimum sectional area S1 with hair was embodiment 1～embodiment 10 of 40%～80% with the maximum secting area S2 of hair, the evaluation of breaking with trichatrophia all was zero, overall merit is zero or △.

With respect to this, do not surpass in 80% the comparative example 2 forming the comparative example 1 of recess and concave depth is more shallow than preferred range, minimum sectional area S1 accounts for maximum secting area S2 ratio with hair, mao portion of the planting rate of scattering is very low, mao portion of planting scatter being evaluated as of rate *.In addition, also as can be known the functional evaluation of comparative example 1 and comparative example 2 also be *, not corresponding with the degree of scattering (mao portion of planting scatter rate) of hair with the replacement time of toothbrush.In addition, comparative example 1 and comparative example 2 with the disconnected evaluation of trichatrophia also be *, overall merit also is *.

In addition, minimum sectional area S1 account for maximum secting area S2 ratio less than 40% comparative example 3 and use by nylon resin constitute with the comparative example 4 of hair with mao to fracture, but it is very high to plant mao portion rate of scattering, mao portion of planting scatter being evaluated as of rate *.

Then, other examples that show the design.

(embodiment 11～embodiment 18)

Use the hair all the other and embodiment 1～embodiment 10, comparative example 1～comparative example 4 the same toothbrushes that manufacture except that using by what the PTT resin shown in the table 3 constituted.

Table 4 expression is used for the profile of the side view with hair, the arrow locations shown in the side view on the toothbrush of embodiment 11～embodiment 18, ratio ((S1/S2) * 100 (%)) that minimum sectional area S1 accounts for maximum secting area S2, with nominal dimension (spacing, the degree of depth, width), with hair directly.In addition, on table 4 profile, the area of the part shown in the oblique line is minimum sectional area S1, and the part that enclosed with dashed lines is come is maximum secting area S2.

[table 4]

Utilize the toothbrush of embodiment 11～embodiment 18, the same with embodiment 1～embodiment 10, comparative example 1～comparative example 4, carried out (1) with hair endurancing and (2) functional evaluation.It is as a result shown in the table 5.

[table 5]

Shown in table 4 and table 5, be formed with a plurality of recesses on surface with hair, be that the evaluation of breaking with trichatrophia all is zero among embodiment 11～embodiment 18 of 40%～80% with the maximum secting area S2 of hair with the minimum sectional area S1 of hair, overall merit is zero or △.

The possibility of utilizing on the industry

Toothbrush of the present invention is concentrated by alleviating with the stress of hair root section, can prevent with mao rive or roll over Disconnected. In addition, according to the present invention, can provide visually and can clearly replace the toothbrush of time.

Claims

1, a kind of toothbrush, it plants pieces in planting hair side, and this pieces is with by poly terephthalic acid 1, and what ammediol ester resin constituted forms with mao tying up, it is characterized in that,

Described with the hair the surface be formed with a plurality of recesses, be formed with described recess the position described with the hair minimum sectional area be described with mao maximum secting area 40%～80%.

2, toothbrush as claimed in claim 1 is characterized in that, described recess is 0.3mm～1.2mm in the described spacing of prolonging direction with hair, be that 0.1mm～0.8mm, the degree of depth are 0.1 times～0.5 times with the hair footpath in the length of described prolonging direction.