JP2022035457A - Paper shaft and swab - Google Patents

Abstract

To provide an inexpensively-manufacturable paper shaft having improved strength, and difficult to slip; and to provide a swab using the same.SOLUTION: In a paper shaft 2 formed by winding a paper sheet, an embossed groove 4 extending in a circumferential direction or in an axial direction is formed at least on a center area 2b in the axial direction. The swab 1 includes the paper shaft 2, and a fiber lump-like part 3 attached to one end or on both ends of the paper shaft 2.SELECTED DRAWING: Figure 1

Description

The present invention mainly relates to a paper shaft used for a cotton swab used for home use, medical use, industrial use, etc., and a cotton swab using the same.

Conventionally, cotton swabs have been widely used for cleaning ears and the like at home and the like. Also in medical applications, for example, cotton swabs are used for collecting samples such as body fluids. In industrial applications, for example, a cleaning liquid such as a solvent is impregnated into the fibrous mass at the tip of a cotton swab and used for cleaning precision equipment and the like.

In such a cotton swab, a fiber lump-shaped portion in which fibers are wound and bonded in a lump shape is usually formed at one end or both ends of a paper shaft (Patent Document 1). Since the cotton swab is used by gripping the paper shaft part with fingers, the paper shaft is required to have strength that does not easily break, and it is gripped with wet fingers or by wearing gloves with a smooth surface. Even in that case, it is required to be non-slip. On the other hand, there is also a demand for cost reduction of the cotton swab itself.

Utility Model Registration No. 3199448 Gazette

An object of the present invention is to provide a paper shaft having improved strength, being non-slippery, and being able to be manufactured at low cost, and a cotton swab using the same.

The paper shaft of the present invention is formed by winding a paper sheet, and an embossed groove extending in the circumferential direction or the axial direction is formed in at least a central region in the axial direction.
The cotton swab of the present invention includes the paper shaft and a fibrous mass attached to one end or both ends of the paper shaft.

According to the present invention, since a plurality of embossed grooves are formed in the central region of the paper shaft which is the grip portion, the strength of the paper shaft is enhanced and the embossed grooves also exert a non-slip action. .. Further, since the strength of the paper shaft is increased by the embossing groove, the amount of paper used can be reduced, and the paper shaft can be manufactured at low cost.

It is a perspective view of the cotton swab which concerns on one Embodiment of this invention. (A) is a front view of a paper shaft according to an embodiment of the present invention, and (b) is a side view thereof. It is a partially enlarged view of the paper shaft shown in FIG. (A) is a front view of a paper shaft according to another embodiment of the present invention, and (b) is a cross-sectional view taken along the line AA'. It is a front view of the paper shaft which concerns on still another Embodiment of this invention. It is a schematic explanatory drawing which shows an example of the manufacturing method of the paper shaft which concerns on embodiment of this invention.

Hereinafter, the paper shaft and the cotton swab of the present invention will be described with reference to the drawings. FIG. 1 shows a cotton swab 1 according to an embodiment of the present invention.

As shown in FIG. 1, the cotton swab 1 according to the present embodiment includes a paper shaft 2 and a fiber lump-shaped portion 3 formed on one end 2a or both ends 2a and 2a of the paper shaft 2.

The fiber lump-shaped portion 3 is formed by winding fibers around the end portion 2a of the paper shaft 2 and adhering them. As the shape of the fiber mass portion 3, in addition to the teardrop shape as shown in FIG. 1, a cylindrical shape, a spherical shape, an elliptical shape, or the like can be used. The fiber lump-shaped portion 3 may be coated with an adhesive or the like on the surface including the tip surface to allow dust or the like to adhere to the surface.

Examples of the fiber forming the fiber lump portion 3 include various natural fibers (cotton, silk, wool, etc.), recycled fibers (rayon, cupra, etc.), synthetic fibers (polyester fiber, polypropylene fiber, etc.), and the like. In particular, cotton fibers such as degreased cotton having good moisture absorption are preferably used. These fibers may be used alone or in combination of two or more.

The fiber lump-shaped portion 3 is formed by applying a primer to one end 2a or both ends 2a and 2a of the paper shaft 2 and then winding and adhering the fiber. Examples of the lower glue used for adhering the fiber lump portion 3 to the paper shaft 2 include starch glue, polyvinyl alcohol, ethylene-vinyl acetate copolymer, carboxymethyl cellulose and the like.

The paper shaft 2 is manufactured, for example, by applying an adhesive to one side of a paper sheet such as a rectangle and winding it tightly without gaps. The adhesive may be applied at least to the winding end portion of the paper sheet, but may be applied to the entire surface or a part of the adhesive. Further, the tip surface of the paper shaft 2 may be chamfered or formed into a curved surface. In the case of the paper shaft 2 having a circular cross section, the diameter is preferably 1 mm or more and 5 mm or less, preferably 4 mm or less.

As shown in FIGS. 1 and 2 (a) and 2 (b), the paper shaft 2 according to the present embodiment has a plurality of embossed grooves 4 extending in the circumferential direction formed in the central region 2b in the axial direction. .. The embossed groove 4 is composed of a curved waveform. The central region 2b of the paper shaft 2 is a region excluding the end portion 2a, and particularly refers to a region that may be gripped by a finger.
The embossed groove 4 is not limited to the central region 2b, and may be formed over the entire length.

The depth of the embossing groove 4 is preferably 0.05 mm or more and 0.5 mm or less. As a result, the strength of the paper shaft is increased, and the embossed groove 4 prevents the finger from slipping. It should be noted that the larger the depth of the embossed groove 4, the easier it is to break, so it is preferable that the diameter of the paper shaft 2 does not exceed 25%.

Further, as shown in FIG. 3, the distance C between the adjacent embossed grooves 4 and the embossed grooves 4 is preferably 1 mm or more and 5 mm or less. This makes it possible to improve the strength of the paper shaft, which is further effective in preventing the fingers from slipping.

4 (a) and 4 (b) show the paper shaft 21 according to another embodiment of the present invention. A linear embossed groove 41 extending in the axial direction is formed in the central region 21b of the outer peripheral surface of the paper shaft 21. The linear embossed grooves 41 are arranged at appropriate intervals (interval C shown in FIG. 3) in the circumferential direction. Even with such a plurality of linear embossed grooves 41, the strength of the paper shaft 21 is increased and the embossed grooves 41 prevent the fingers from slipping. Others are the same as those of the embodiment shown in FIG.

FIG. 5 shows a paper shaft 22 according to still another embodiment of the present invention. The paper shaft 22 is the same as the embodiment shown in FIG. 2, except that a plurality of linear embossed grooves 42 are formed in the circumferential direction. Even with such a paper shaft 22, the strength is increased and the embossing groove 42 prevents the fingers from slipping.

Next, an example of the method for manufacturing a paper shaft according to the present invention will be described with reference to FIG. FIG. 6 shows an apparatus for forming an embossed groove 41 on the paper shaft 21 shown in FIG.

As shown in the figure, this device includes an embossing table 5 having a plurality of ridges 51 protruding from a curved upper surface, and a rotatable pressure roller 6 arranged above the embossing table 5. Be prepared. When the pressure roller 6 rotates in the direction of the arrow, the paper shaft 21 passes between the embossing table 5 and the pressure roller 6 while rotating. At that time, the paper shaft 21 is molded by the pressure roller 6. Pressurized on the push base 5. Since the ridge 51 protrudes from the embossing table 5, an embossing groove 41 is formed on the surface of the paper shaft 21.

The embossed grooves 4 and 42 as shown in FIGS. 2 and 5 can be easily formed in the same manner by changing the shape of the ridge 51.

As described above, in the present invention, the embossed grooves 4, 41, 42 extending in the circumferential direction or the axial direction are formed in at least the central regions 2b, 21b, 22b of the paper shafts 2,21,22. The strength of 2,21,22 (for example, anti-folding strength) is enhanced, and the embossed grooves 4, 41, 42 also exert an anti-slip action. Furthermore, when compared with a paper shaft without an embossed groove, even if the strength is the same, the strength of the paper shaft is increased by embossing, so that the amount of paper used can be reduced. The paper shafts 2, 21, and 22 can be manufactured at low cost, and the manufacturing cost of the cotton swab 1 can be reduced.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various changes and improvements can be made within the scope of the present invention. For example, the embossed groove may be a continuous spiral groove.

1 Cotton swab 2, 21,22 Paper shaft 2a Edge 2b, 21b, 22b Central area 3 Fiber mass 4, 41, 42 Mold push groove 5 Stamp stand 51 Protrusion 6 Pressurized roller

Claims (4)

A paper shaft formed by winding a paper sheet, characterized in that an embossed groove extending in the circumferential direction or the axial direction is formed in at least a central region in the axial direction. The paper shaft according to claim 1, wherein the embossed groove has a depth of 0.05 mm or more and 0.5 mm or less (however, it must not exceed 25% of the diameter of the paper shaft). The paper shaft according to claim 1 or 2, wherein the embossed groove is formed of a curved line or a straight line, and the distance between the adjacent embossed grooves is 1 mm or more and 5 mm or less. A cotton swab comprising the paper shaft according to any one of claims 1 to 3 and a fiber mass attached to one end or both ends of the paper shaft.

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