WO2018182007A1

WO2018182007A1 - Interdental cleaning implement

Info

Publication number: WO2018182007A1
Application number: PCT/JP2018/013959
Authority: WO
Inventors: 岡本　好弘; 洋一平岡
Original assignee: Ｋｂセーレン株式会社
Priority date: 2017-03-30
Filing date: 2018-03-30
Publication date: 2018-10-04
Also published as: JP6916269B2; JPWO2018182007A1

Abstract

The present invention provides an interdental cleaning implement that: exhibits good insertability due to being rigid; is capable of maintaining a band-like shape during use and thereby is able to clean a wide area at a time; makes it easy to clean lateral surfaces between teeth; exerts an extremely high cleaning effect; and uses multiple filaments so as to give a soft feel at the interdental space and gums. The interdental cleaning implement comprises a textile formed of multiple filaments, wherein the cover factor (K) of the warp and weft of the textile satisfies formula (1).

Description

Interdental cleaning tool

The present invention relates to a belt-like interdental cleaning tool using a woven fabric.

間 Between the teeth, even when brushing with a toothbrush, the tip of the hair is difficult to reach, and plaques causing tooth decay and periodontal disease tend to accumulate. Flossing with an interdental cleaning tool such as dental floss is effective for removing plaque between teeth.

The health of the oral cavity may affect the health of the body, and in recent years there has been a strong interest in oral care, and the demand for interdental cleaning tools is increasing. There are various interdental cleaning tools, such as those with excellent insertability and use feeling such as hitting the gums and cleaning effects. As the interdental cleaning tool, there are a thread-like interdental cleaning tool and a belt-like interdental cleaning tool. The user can use an interdental cleaning tool that suits his / her preference in view of insertability, a feeling of cleaning, a feeling of use such as contact between teeth and gums, and an actual cleaning effect.

As a thread-like interdental cleaning tool, for example, there is an interdental cleaning tool that uses a twisted split fiber (Patent Document 1). In this interdental cleaning tool, the edge of the split yarn appears efficiently on the surface by twisting, so that it can effectively scrape off the plaque without applying strong force and hit the teeth and gums during use. Is soft and easy to use.

In addition, the core yarn and sheath yarn are heat-sealed by spirally winding a heat-sealing yarn thicker than the core yarn and having a high heat shrinkage rate around the core yarn consisting of ultrafine multifilaments with a gap between them. There is an interdental cleaning tool partially fixed by (Patent Document 2). This interdental cleaning tool has an excellent cleaning effect due to the core yarn that has been twisted due to a difference in thermal shrinkage. Further, since the portion of the core yarn fixed to the sheath yarn has a degree of freedom, fuzz and yarn breakage do not occur during insertion.

Examples of the band-like interdental cleaning tool include an interdental cleaning tool using a tape obtained by partially fusing adjacent ultrahigh molecular weight polyethylene multifilaments (Patent Document 3). Because it uses ultra-high molecular weight polyethylene, it has high strength and is difficult to tear while passing between closely spaced teeth, and can be inserted between teeth without damaging the tape. It is said that it can be cleaned while being maintained.

Also, there is an interdental cleaning tool using PTFE (polytetrafluoroethylene) tape (Patent Document 4). When using a PTFE interdental cleaning tool wrapped around both hands as a long-winding type, the high slidability that is a characteristic of PTFE makes it difficult to handle such as falling off the core of the container or being difficult to pinch when used. In order to compensate for this, the friction coefficient is increased by making one side a matte surface.

Also, there is a cleaning tool suitable for cleaning minute gaps by using ultrafine fibers as string-like structures such as knitted fabrics and braids (Patent Document 5). Since the direction of the eyes arranged in the circumferential direction of the string-like structure is angled with respect to the longitudinal direction of the string-like structure, the cleaning tool exhibits an excellent cleaning effect only by sliding in the longitudinal direction. .

Japanese Patent No. 5236864 Japanese Patent No. 522280 Japanese Patent No. 4850846 Japanese Patent No. 4049273 JP 2003-200117 A

However, in the inventions described in Patent Document 1 and Patent Document 2, since it is a thread-like interdental cleaning tool, the cleaning effect ability of the gap between the teeth and gums is high, but the cleaning effect on the interdental side surface is poor. Moreover, although patent document 1 has description that a knitted fabric or a woven fabric may be sufficient, the specific structure is not described.

In the invention described in Patent Document 3, although it is a band-like interdental cleaning tool, the cleaning effect is low because only grooves are formed in the longitudinal direction of the ultrahigh molecular weight polyethylene tape. In addition, there has been a problem that the plaque that has been scraped off cannot be retained, and the plaque easily reattaches.

Moreover, in the invention described in Patent Document 4, although it is a band-like interdental cleaning tool, since it is in the form of a tape, the cleaning effect is low. Further, the scraped plaque cannot be held inside, and the plaque tends to reattach. In addition, when used as a long-winding type, since one side is a matte surface for the purpose of preventing dropping from the package due to the high slidability of PTFE and making it easier to hold by hand, the cleaning effect varies depending on the surface.

Also, when a knitting cleaning tool such as that described in Patent Document 5 is used as an interdental cleaning tool, the insertability is poor because there is no stiffness.

Therefore, an object of the present invention is to provide an interdental cleaning tool that has good insertability, a high cleaning effect on the interproximal side, and a soft contact between the teeth and gums.

As a result of intensive studies, the present inventors have used a woven fabric composed of multifilaments having a specific cover factor as a band-like interdental cleaning tool. The present inventors have found that a good interdental cleaning tool can be obtained and completed the present invention.
That is, the object of the present invention is achieved by an interdental cleaning tool comprising a woven fabric composed of multifilaments, wherein the cover factor (K) of the background of the woven fabric satisfies the following formula (1). Is done.

The width of the fabric is preferably 2 to 7 mm and the thickness is preferably 0.03 to 0.1 mm.

Further, the woven structure of the woven fabric is preferably a plain weave.

Further, the single yarn fineness of the multifilament of the woven fabric is preferably 0.3 to 10 dtex.

Moreover, it is preferable that the warp of the ear part in the woven fabric is a multifilament having a total fineness smaller than that of the warp of the formation part.

According to the present invention, since there is stiffness, insertability is good, and it can be used while maintaining a belt shape, so that it can be cleaned by capturing a large area at a time, easy cleaning of the interdental side surface, high cleaning effect Also, because of the use of multifilaments, the contact between the teeth and the gums is soft, the plaque is firmly held inside the multifilament, preventing reattachment, and the teeth and gums are good An interdental cleaning tool with good usability that can be cleaned without discomfort can be obtained.

The interdental cleaning tool of the present invention is a fabric composed of multifilaments. By using a woven fabric, wefts are present, and as a result, irregularities can be formed as compared with yarn-like ones, so that the cleaning property is high.
The interdental cleaning tool of the present invention may be used as a long winding type for picking and flossing a fabric by hand, or as a holder type for flossing with a fabric stretched on an F-shaped or Y-shaped holder.

The fabric in the present invention is an interdental cleaning tool in which the cover factor (K) of the background of the fabric satisfies the above formula (1).

If the ratio of the background cover factor (K) satisfies the above formula (1), the woven fabric is stiff and easy to insert without being bent during insertion. Can be used to clean the interproximal side. Further, the ratio of the cover factor (K) of the above process is more preferably 2.5 to 3.5.

The width of the woven fabric in the present invention is preferably 2 to 7 mm, and more preferably 4 to 5 mm. If the width of the woven fabric is 2 mm or more, a wide area can be captured at a time and the interproximal side can be cleaned well. Moreover, if the width | variety of a textile fabric is 7 mm or less, it will not protrude from a tooth | gear and it will be easy to clean.

The thickness of the fabric in the present invention is preferably 0.03 to 0.1 mm, more preferably 0.05 to 0.08 mm. If the thickness of the woven fabric is 0.03 mm or more, the woven fabric is stiff, so that it is difficult to bend and become impossible to insert during insertion. Moreover, if the thickness of the fabric is 0.1 mm or less, it can be inserted without difficulty even between narrow teeth.

The woven structure of the woven fabric in the present invention includes plain weave, twill, satin weave, etc., but plain weave is preferred. If the woven fabric is a plain weave, the same cleaning effect can be obtained on either side because the texture of the fabric is the same. In addition, since there are many texture points where the warp and the weft intersect, and there are many irregularities in contact with the teeth, an excellent cleaning effect can be obtained. Further, since it is strong against friction, it is difficult to break the yarn.

The total fineness of the multifilament in the present invention is preferably 5 to 110 dtex, and more preferably 10 to 50 dtex. If the total fineness is 5 dtex or more, it will not break during cleaning due to insufficient strength. In addition, if the total fineness is 110 dtex or less, the fabric does not become thicker than the interdental space, and the insertability when used as an interdental cleaning tool is good.

The total fineness of the warp is preferably larger than the total fineness of the weft. If the total fineness of the warp is greater than the total fineness of the weft, the warp will stick out in the direction perpendicular to the insertion direction, making it easy to insert. The difference between the total fineness of the warp and the total fineness of the weft is preferably 10 to 100 dtex.

In the present invention, the single filament fineness of the multifilament is preferably 0.3 to 10 dtex, and more preferably 0.5 to 3 dtex. If the single yarn fineness is 0.3 dtex or more, fluff due to single yarn breakage can be suppressed. Moreover, if the single yarn fineness is 10 dtex or less, the specific surface area of the multifilament is large, and the cleaning effect is high.

Moreover, it is preferable that the warp of the ear | edge part of the textile fabric is a multifilament whose total fineness is smaller than the warp of the formation part. Usually, the woven fabric has an ear height because the weft has a folded portion at the ear, but the ear height is further suppressed when the total fineness of the warp at the ear is smaller than the warp at the formation portion.
In this case, the difference between the total fineness of the warp at the ear of the fabric and the total fineness of the warp at the formation portion is preferably 5 to 20 dtex. If the difference in the total fineness is within the above range, the ear portion does not become thick and can be easily inserted between teeth. When the ear height is suppressed, it is easy to insert without interfering with the ear part at the time of insertion, good contact with the teeth and gums, and cleaning without discomfort can be achieved.

The multifilament in the present invention is preferably composed of at least one polymer selected from polyester, polyamide, polyethylene, polypropylene PTFE and the like.
In particular, a polyester that is well-balanced in terms of productivity and physical properties (strength, heat resistance, weather resistance, discoloration, etc.) of multifilaments and narrow fabrics is preferable.

The multifilament in the present invention may have a circular cross-sectional shape, an elliptical shape, or an irregular cross-sectional shape. For example, since a multilobal shape or a triangular cross section has an edge, the plaque can be efficiently removed by scraping.

The multifilament in the present invention may be a multifilament made of a polymer having two or more components, such as a side-by-side composite fiber or a split composite fiber.

The multifilament in the present invention may be given a function by surface processing such as wax processing, fluorine processing, flavor processing and the like.

The fabric in the present invention may use two or more types of multifilaments.

For example, the interdental cleaning tool of the present invention is manufactured as follows. That is, using a multi-filament as described above, a woven fabric is manufactured to have a desired cover factor and width suitable for an interdental cleaning tool, and the resulting woven fabric is cut into a predetermined length. The interdental cleaning tool of the present invention can be obtained by winding up and the like.

Hereinafter, the present invention will be specifically described with reference to examples, but the present invention is not limited to these examples. Moreover, each evaluation in an Example was performed as follows.

(Measurement of thickness and width)
Thickness gauge G-1M (manufactured by Ozaki Mfg. Co., Ltd.) is used to measure the thickness of the ground and ear parts of the fabric used as an interdental cleaning tool, and the width of the fabric using standard calipers (manufactured by Mitutoyo Corporation). did.

(Sensory evaluation test)
The sensory evaluation test about the insertability and feeling of use using each interdental cleaning tool was carried out by 10 professional monitors. The evaluation criteria are as follows. The most frequent evaluation among the 10 evaluations was the evaluation of the interdental cleaning tool.
<Insertability> Very good: ◎, good: ◯, slightly bad: △, bad: ×
<Usability> Very good: ◎, good: ◯, slightly bad: △, bad: ×

(Cleaning effect evaluation test)
As a test for evaluating the cleaning effect of the interdental cleaning tool, artificial plaque (Nissin Co., Ltd.) was applied to the side of a cylindrical glass bottle, and both ends of the fabric cut into 20 cm were stretched in the left-right direction, and the artificial plaque application surface Was reciprocated from end to end. The amount of artificial plaque remaining on the side surface of the glass bottle through which the fabric was reciprocated was visually observed and evaluated. The evaluation criteria are as follows.
No residue at all: ◎, slightly remaining but generally good: ◯, remaining: △

Example 1
33 dtex / 12f polyethylene terephthalate multifilament (KB Selen) is used as the warp, 10 dtex / 4f polyethylene terephthalate multifilament (KB Selen) is used as the weft, and the number of warp threads is 140 / inch ( 2.54 cm), weaving a plain woven fabric with a width of 4 mm, the number of wefts driven was 96 / inch (2.54 cm), and used as an interdental cleaning tool.
Using the obtained interdental cleaning tool, thickness measurement, sensory evaluation test of insertability and usability, and cleaning effect evaluation test were performed.

(Example 2)
An interdental cleaning tool was prepared in the same manner as in Example 1 except that 22 dtex / 8f polyethylene terephthalate multifilament (KB Selen) was used as the warp of the ear, and the obtained interdental cleaning tool was used. Thickness measurement, sensory evaluation test of insertability and usability, and cleaning effect evaluation test were performed.

(Example 3)
56dtex / 24f polyethylene terephthalate multifilament (KB Selen) is used as the warp for the formation portion, and 22 dtex / 8f polyethylene terephthalate multifilament (KB Selen) is used as the warp for the ears. An interdental cleaning tool was prepared in the same manner as in Example 1 except that the number was 125 / inch (2.54 cm), and the thickness measurement, insertability, and feeling of use were obtained using the obtained interdental cleaning tool. The sensory evaluation test and the cleaning effect evaluation test were conducted.

Example 4
A 22 dtex / 8f polyethylene terephthalate multifilament (manufactured by KB Seiren) was used as the warp of the ear, the number of warp threads was 160 / inch (2.54 cm), and the number of weft threads was 62 / inch (2. The interdental cleaning tool was prepared in the same manner as in Example 1 except that the thickness was 54 cm), and the obtained interdental cleaning tool was used for thickness measurement, sensory evaluation test of insertability and feeling of use, and cleaning effect evaluation test. Went.

(Example 5)
An interdental cleaning tool was produced in the same manner as in Example 1 except that the width of the woven fabric was set to 6 mm. Using the obtained interdental cleaning tool, thickness measurement, sensory evaluation test of insertability and usability, cleaning An effect measurement evaluation test was conducted.

(Example 6)
An interdental cleaning tool was prepared in the same manner as in Example 1 except that the woven structure of the woven fabric was a twill weave and the number of weft threads was 85 / inch (2.54 cm). Using this, a thickness measurement, a sensory evaluation test of insertability and usability, and a cleaning effect measurement evaluation test were performed.

(Example 7)
An interdental cleaning tool was prepared in the same manner as in Example 1 except that nylon 6 multifilament (manufactured by KB Seiren Co., Ltd.) was used. Thickness measurement, insertability and usability were obtained using the obtained interdental cleaning tool. The sensory evaluation test and the cleaning effect evaluation test were conducted.

(Comparative Example 1)
An interdental cleaning tool was prepared and obtained in the same manner as in Example 1 except that the number of warp threads was 160 / inch (2.54 cm) and the number of weft threads was 50 / inch (2.54 cm). Using the obtained interdental cleaning tool, thickness measurement, sensory evaluation test of insertability and usability, and cleaning effect evaluation test were performed.

(Comparative Example 2)
An interdental cleaning tool was prepared in the same manner as in Example 1 except that the number of wefts driven was 140 / inch (2.54 cm), and the thickness measurement and insertion properties were performed using the obtained interdental cleaning tool. In addition, a sensory evaluation test for feeling of use and a cleaning effect evaluation test were performed.

These results are also shown in Table 1.

The interdental cleaning tool of Example 1, Example 3, Example 4 and Example 7 has a good insertion property because it is firm (O), and the area between the teeth and the gums are soft and feel good to use. Was very good (◎). Further, the cleaning effect evaluation test can be used while maintaining a band shape because the interdental cleaning tool is stiff. As a result, no plaque remained (残留) and the cleaning effect was high. It was well suited as an interdental cleaning tool.

Example 2 had better insertability (◎) than Example 1. This is because the thickness of the ear is small. It was suitable as an interdental cleaning tool.

Example 5 and Example 6 were good (O). This is because Example 5 has a wide width and is difficult to use a little. Example 6 is because the twill weave is more movable than the plain weave and is a little difficult to use. Both were suitable as interdental cleaning tools.

Comparative Example 1 had a slightly poor insertion property (Δ), and the usability was poor (x). This is because the ratio of the cover factor (K) of the weft of the fabric is large because the number of wefts driven is small, and the fabric is not stiff. Moreover, the insertability of Comparative Example 2 was poor (x), and the usability was difficult to insert and could not be evaluated. It was not suitable as an interdental cleaning tool.

The interdental cleaning tool of the present invention can be suitably used for interdental cleaning.

Claims

An interdental cleaning tool comprising a woven fabric composed of multifilaments, wherein the cover factor (K) of the background of the woven fabric satisfies the following formula (1).
The interdental cleaning tool according to claim 1, wherein the woven fabric has a width of 2 to 7 mm and a thickness of 0.03 to 0.1 mm.
The interdental cleaning tool according to claim 1 or 2, wherein the woven structure of the woven fabric is a plain weave.
The interdental cleaning tool according to any one of claims 1 to 3, wherein the single filament fineness of the multifilament of the woven fabric is 0.3 to 10 dtex.
The interdental cleaning tool according to any one of claims 1 to 4, wherein the warp of the ear in the woven fabric is a multifilament having a total fineness smaller than that of the warp of the formation portion.