JPS63132653A - Rod-shaped absorbing material for oral cavity - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an oral absorbent material used for absorbing and removing unnecessary moisture such as saliva in one oral cavity in dental treatment.

[Conventional technology]

Conventionally, absorbent cotton, which is an aggregate of short fibers, has been used to absorb and remove water such as saliva in the oral cavity during dental treatment, to secure space for the treatment, and when chewing. It is used by cutting it into pieces or rolling it, and in order to omit the above-mentioned processing operations, cut cotton that has been cut into an appropriate size in advance or cotton that has been processed into a rod shape is also used.

[Problem that the invention seeks to solve]

However, in the conventional methods mentioned above, in the case of absorbent cotton, it must be cut into an appropriate size or rolled up each time it is used, and cut cotton does not function well for cleaning the oral cavity. However, there is a large amount of fuzz and fibers remaining in the oral cavity, and in the case of stick-like cotton,
Although this is an improvement over cut cotton and absorbent cotton, adhesives such as carboxymethyl cellulose, which are used to prevent surface fluffing and provide shape retention, are water-soluble, so they can be eluted by saliva, etc. As a result, fibers may remain in the oral cavity or become entangled with treatment tools. For this reason, to prevent fuzzing and fibers remaining in the oral cavity, approximately half of the outer periphery of the cotton rod is covered with a moisture-repellent film, and thin threads are spirally wound around the outer periphery (
(Japanese Utility Model Publication No. 59-21178), or a mixture of cotton-like pulp and powdered superabsorbent material is wrapped in a water-permeable, heat-sealable outer skin, and both ends are secured (Japanese Utility Model Publication No. 59-21178). 60-7708), but in the former case, the constituent fibers are easily removed from between the fine filaments, and in the latter case, there is less fibrous material remaining in the oral cavity, and there is no effect on the exclusion effect during water absorption. Although this method is excellent, it is not suitable for continuous high-speed production because both lengthwise ends are fixed by means such as heat sealing.

The present invention improves the drawbacks of the prior art described above, and provides a rod-shaped absorbent material for the oral cavity that has high moisture absorption and removal performance during dental treatment, has few fibers shed into the oral cavity, and is highly productive. It is something to do.

[Means for solving problems]

The present invention provides a method for oral cavity use in which a water-permeable tape containing heat-fusible fibers is wound around the outer periphery of a fiber aggregate, and at least the overlapped portions of the tape are joined by heat-fusion, and the tape is cut into a predetermined length. It is in the rod-shaped absorbent material.

The fiber aggregate used in the present invention includes acetate,
Single or mixture of two or more crimped long fibers from the group of rayon, polyester, polypropylene, acrylic, absorbent cotton, polyester cotton, rayon cotton, polypropylene cotton,
Single or a mixture of two or more short fiber slivers from the acrylic cotton group, pulp, one or two or more short fibers of cotton, hemp, polyester, polypropylene, acrylic, and rayon made into sheets, bulb fibers Examples include those formed by adhesive into a sheet shape or a circular rod shape. In addition, water permeable tapes containing heat-fusible fibers include single low-melting point fibers from the group of polypropylene, polyester, polyethylene, and nylon, or fibers containing low-melting point components in a composite of two or more types, or vinyl chloride and vinyl acetate fibers. The fibers made from the copolymer are cut into short fibers and then made into paper to make a narrow tape, or after being made into paper, it is embossed and made into a sheet, which is made into a garden material, 6, or a spunbond or dry non-woven fabric. It is possible to use a tape made of a thin cloth or a tape made of a woven or knitted fabric containing the above-mentioned fibers. Here, the heat-fusible fibers can be used alone or in combination with other fibers, but if the content of the heat-fusible fibers in the tape is less than 10% by weight, the adhesive strength will be weak, which is undesirable. % or more, preferably 20% or more.

Furthermore, the water absorption rate can be further improved by mixing preferably 5 to 30% by weight of powder or fibers made of a highly water-absorbing substance that exhibits a water absorption rate of 30 to 1000 times its own weight in the fiber aggregate. can.

[Effect]

The absorbent material of the present invention is provided by winding a tape having heat-sealing properties and water permeability around the outer periphery of a fiber aggregate, and forming a tape overlapping portion, or a tape overlapping portion and an outer circumferential surface of the tape and fiber aggregate. Although it is possible to heat-seal both the contact parts with the tape, it can also be manufactured by heat-sealing at least the overlapping parts of the tape to form a long rod-shaped body, and then cutting it into a predetermined length. The sides of the aggregate are covered with water-permeable tape, and since only the water-permeable tape comes into contact with the inside of the oral cavity, the constituent fibers do not fall off, and the moisture in the oral cavity is taken up into the fiber aggregate by capillary action. This ensures sufficient water absorption properties, and since no adhesive is used, no adhesive components will be eluted into the mouth.

Example] The present invention will be explained below with reference to Examples.

Example 1 A uniformly spread acetate crimped long fiber tow with a single fiber fineness of 3 denier, a Y-shaped single fiber cross-sectional shape, and a total fineness of 50,000 denier was used as a fiber aggregate, and used as a water-permeable tape. A random web consisting of 65% by weight of rayon cotton with a single fiber fineness of 3 denier and 35% by weight of heat-fusible fibers was dry-processed into a nonwoven fabric with a basis weight of 35 or more, and this was slit to form a tape with a width of 32 m. The heat-fusible fiber used here is a single fiber having a fineness of 4 denier and is a composite spun fiber of polyester having a melting point of 260°C and polyethylene having a melting point of 130°C.

Using general cigarette filter manufacturing equipment, a water-permeable tape was wound around the outer circumference of the acetate crimped long fiber tow, and the overlapped portion of the water-permeable tape was heated and fused using an iron bar heated to 165°C, and then a water-cooled bar After cooling, the absorbent material was cut into a length of 30 fl to produce a rod-shaped absorbent material as shown in FIG. This absorbent material had a cylindrical shape as shown in FIGS. 1 and 2, and had a diameter of 9.8 vx.

Moreover, the production speed was able to produce 2000 pieces of absorbent material per minute.

The performance of the obtained absorbent material is shown in Table 1.

Example 2 A 71-cm sliver of absorbent cotton was used as the fiber aggregate, and the water-permeable tape was 30% by weight of rayon cotton with a single fiber size of 3 denier, 20% by weight of polyester cotton with a single fiber size of 4 denier, and heat-fusible. A random web made of 50% by weight of fibers is dry-processed to form a width 32 made of nonwoven fabric with a basis weight of 30%.
I used dragon tape. The heat-fusible fiber used here is a fiber having a single fiber fineness of 4 denier, which is made by composite spinning of polyester with a melting point of 260°C and polyester with a melting point of 130°C.

The fiber aggregate and water-permeable tape were wound up into a circular rod-shaped absorbent material having a diameter of 9.6 mm and a length of 30 mm in the same manner as in Example 1. Also, the production speed is 1000 pieces/minute. The performance of this absorbent material is shown in Table 1 together with the performance of the absorbent material obtained in Example 1.

The rod-shaped absorbent material of Examples 1 and 2, diameter 8.6 silk, length 3
1) +T commercially available roll cotton (hereinafter referred to as comparative product) was placed horizontally in a petri dish filled with water to a depth of half its diameter, left to stand for 5 minutes, then taken out, and its water absorption properties were investigated. It is shown in Table 1. Here, the water absorption capacity is expressed as the weight after water absorption divided by the weight before water absorption, and the hardness before water absorption is the height from the bottom surface when the sample is placed horizontally and a load of 300 J' is applied from above. , is expressed as the value divided by the height from the bottom surface before applying the load, multiplied by 100, and the hardness after water absorption is:
The height from the bottom when a load of 3007' is applied from above to the sample taken out from the Petri dish after standing still for 5 minutes is the height from the bottom of the sample before water absorption is applied. The divided value is multiplied by 100.

Table 1 [Effects of the Invention] As described above, the present invention not only has excellent water absorption ability as an oral absorbent material, but also has excellent morphological stability when wet, as shown by hardness, and does not cause the constituent fibers to fall off. In addition, since no adhesive is used to impart shape stability, there is no elution of these materials, making the rod-shaped absorbent material easy to use and highly productive.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view of the rod-shaped absorbent material of the present invention, and FIG. 2 is a cross-sectional view thereof. 1... Fiber aggregate, 2... Water-permeable tape, 3°
・・・Heat fusion bonding part

Claims (8)

[Claims] (1) A rod-shaped oral cavity made by winding a water-permeable tape containing heat-fusible fibers around the outer periphery of a fiber aggregate, joining the tape by heating and fusing at least the overlapping portions, and cutting the tape into a predetermined length. Absorbent material. (2) The rod-shaped absorbent material for oral cavity according to claim 1, wherein the fiber aggregate is made of crimped long fibers. (3) The rod-shaped absorbent material for oral cavity according to claim 1, wherein the fiber aggregate is made of short fiber sliver. (4) The fiber aggregate is pulp, cotton, linen, polyester,
The rod-shaped absorbent material for oral cavity according to claim 1, which is made of short fibers from the group of polypropylene, acrylic, and rayon, either singly or as a mixture, molded into a sheet. (5) The rod-shaped absorbent material for oral cavity according to claim 1, wherein the fiber aggregate is made of pulp fibers, and the pulp fibers are bonded to each other with an adhesive. (6) Claims 1, 2, and 3 in which the content of heat-fusible fibers in the water-permeable tape is 10% or more.
The rod-shaped absorbent material for oral cavity according to item 1, 4 or 5. (7) The heat-fusible fiber is a single low-melting fiber from the group of polypropylene, polyester, polyethylene, and nylon, or a composite fiber containing a low-melting component of two or more of them, or a copolymer of vinyl chloride and vinyl acetate. The rod-shaped absorbent material for the oral cavity according to claim 6, which is a fiber comprising: (8) Claims (1), (2), (3), (4), (5), (6), or (4) which include superabsorbent powder or superabsorbent fibers mixed in the fiber aggregate. The rod-shaped absorbent material for oral cavity according to item 7.