JP5689244B2 - Applicator - Google Patents

Description

  The present invention is a direct liquid application in which a coating liquid such as ink, cosmetics, liquid medicine, and adhesive is directly stored in a liquid container such as an ink tank and the coating liquid is applied to an object (including writing). Concerning ingredients.

  2. Description of the Related Art Conventionally, in an applicator, an application liquid such as ink or cosmetic directly stored in a liquid storage unit is applied to an object by an application body. For example, in Patent Literature 1, a partially exposed inner shaft at the rear end of the applicator is pressed forward to supply or not supply liquid from the liquid contained in the inner shaft to the application body by a valve member. An applicator having a valve device and exposing a part of the rear end portion is disclosed.

However, the inner shaft described in Patent Document 1 mainly uses a material such as polypropylene (PP) and is formed to be cloudy or translucent, and the color of the coating liquid inside the inner shaft is not clearly visible. In addition, if a highly transparent material such as a glass material is used, the inner shaft may be damaged by dropping. In addition, for example, when a nylon resin is used, the color visibility is improved. However, since the nylon resin absorbs moisture or the like filled in the inner shaft, the shaft diameter changes. It is not suitable for such a structure.
That is, in Patent Document 1, in an apparatus for supplying a liquid to a coating body from a liquid that is housed by sliding the inner shaft back and forth by pressing the partially exposed inner shaft at the rear end of the applicator. If the outer diameter of the inner shaft changes, a problem occurs in the sliding operation of the inner shaft.
Polyethylene terephthalate (PET) is also a highly transparent resin. However, in the case of cosmetics containing ethyl acetate / butyl acetate as the main solvent, such as nail enamel cosmetics, there is a problem in gas barrier performance.
Moreover, the technique which uses the molded object of the 2 layer structure like patent document 2 as a shaft main body is disclosed.
For nail enamel cosmetics such as cosmetics with ethyl acetate / butyl acetate as the main solvent, it is assumed that the gas barrier performance is good, but the outer layer is an olefin resin. Or it becomes a polyethylene resin, becomes cloudy or translucent, and does not solve or suggest the problem of the present invention.

JP2009-160928 JP 2001-314803 A

  From the above, even when the techniques disclosed in the above-mentioned patent documents are combined, a clear transparency cannot be obtained because the color of the inner shaft filled with the coating liquid is cloudy or translucent. Also, the inner shaft may be broken by dropping.

Therefore, the present inventor has achieved the following invention after intensive development.
A cylindrical main body with a coating portion attached to the tip, and a replaceable liquid that is filled with a coating solution and is stored in the main body cylinder so that the axial direction of the main body can be moved, and is partially exposed from the main body cylinder. An applicator provided with an inner cylinder and a valve set attached to the tip of the inner cylinder, wherein the inner cylinder has a two-layer structure, and an inner layer and an outer layer are formed of different resins, Is an applicator characterized by being blow-molded with polyethylene naphthalate (PEN) on the inner layer and polyethylene terephthalate (PET) on the outer layer with respect to the axial direction.
In a two-layer blow having a polyethylene naphthalate (PEN) in the inner layer and polyethylene terephthalate (PET) in the outer layer, both resins have a polyester structure, so an adhesive layer may be provided between the layers. There may be no adhesive layer.
Further, the inner layer thickness A of the inner cylinder is 0.1 to 1.2 mm, and the outer layer thickness B is 0.00 mm.
5 to 1.2 mm.

By the means described above, it is possible to provide an applicator having an inner cylinder that has a high transparency and is easy in remaining amount of the inner solution and is resistant to cracking.
Further, by exposing only a part of the inner cylinder from the applicator main body, it is possible to provide an applicator having a structure that is more resistant to cracking even if it falls on the ground or the like during use.
Cosmetics with ethyl acetate / butyl acetate as the main solvent, such as nail enamel cosmetics, with polyethylene naphthalate (PEN) on the inner layer and polyethylene terephthalate (PET) on the outer layer In this case, it is possible to obtain an applicator having an inner cylinder that has high gas ultraviolet barrier properties and mechanical strength, low gas permeability, and excellent thermal stability, dimensional accuracy, and electrical characteristics.

It is drawing of the applicator in embodiment of this invention. It is sectional drawing of the inner cylinder of the applicator in embodiment of this invention.

Hereinafter, a direct liquid applicator according to an embodiment of the present invention will be described with reference to the drawings.
The tip refers to the side on which coating or writing is performed on the front side, and the rear end refers to the back side on which the inner cylinder can be pressed.
First, a schematic configuration of the direct liquid applicator of the present embodiment will be described with reference to FIG.
Fig.1 (a) is an external view of the applicator of embodiment of this invention. FIG.1 (b) is sectional drawing of the applicator of embodiment of this invention.

  As shown in FIG. 1, the direct liquid type applicator W of the present embodiment includes a hollow cylindrical main body 10 constituted by an outer cylinder 1 and a tip shaft 2, and the outer cylinder 1 within the outer cylinder 1. An inner cylinder 20 movably stored in the axial direction, an inner tip shaft 30 attached to the distal end portion of the inner cylinder 20, a valve set 40b attached in the distal end side tube of the inner cylinder 20, and a leading shaft 2 And a cap 50 that is detachably attached to the outer peripheral portion of the.

The application unit 11 has a marking pen shape, but is not particularly specified as long as it can be written or applied such as a brush shape or a spatula shape.

The inner cylinder 20 is filled with a coating solution, and a stirring ball 22 floats therein. The stirring ball 22 may be included in the inner cylinder 20 according to the components of the inner solution to be accommodated.
By sliding, the inner solution having the sediment component can be uniformly dispersed. The material used is resin,
It is not specified unless it is a material that alters the inner solution, such as glass.

A valve set 40b is housed at the front end of the inner cylinder 20, and the valve set 40b and the inner cylinder 20 are fixed by screwing the front end edge 20c with the inner tip shaft 30 to constitute a cartridge body. A central hole through which the liquid introduction pipe 12 can be inserted and removed is formed at the center of the valve set 40b and the inner tip shaft 30. Even if the coating liquid in the inner cylinder 20 runs out by pulling out the inner cylinder 20 to the rear end side, the liquid introduction pipe 1 with the inner front shaft 30 side of the new cartridge body filled with the coating liquid as the front end side.
After being brought into contact with 2, it can be easily replaced by pushing it strongly toward the tip side. Since only the cartridge body needs to be replaced to fill the coating liquid, it is not necessary to discard the coating section, which can contribute to a reduction in waste.

The valve set 40 b includes a valve rod 41, a spring receiver 42, a valve seat 70 and a spring 44.
The valve seat 70 has a seal portion (a first seal portion 73 and a second seal portion 74) that surrounds the outer peripheral side surface of the liquid introduction tube 12 at the tip thereof, and the liquid from the liquid introduction tube 12 is formed by the seal portion. It is designed to prevent leakage.
Therefore, in this embodiment, a dedicated part (for example, rubber packing) for preventing leakage of the liquid discharged from the valve set 40b attached to the tip of the inner cylinder 20 becomes unnecessary, and the above-described conventional technology The number of parts can be reduced as compared with the applicator.

Further, in the present embodiment, the valve seat 70 having the seal portion is formed of a resin such as polyethylene (for example, high density polyethylene (HDPE (High Density Polyethylene)) or polypropylene (PP (Polypropylene)).
Thus, the use of the above-described resin has a characteristic that the resin component is less permeable to the resin compared to rubber parts, and is transmitted from the liquid introduction pipe 12 to the outside of the applicator W. The permeation amount of the coating liquid to be reduced can be reduced.

The valve seat 70 has openings (71a, 71b) formed at both ends, a cylindrical body portion 71 having a through hole 71c that penetrates the openings at both ends, and a flange portion 72 formed at the distal end of the cylindrical body portion 71. The cross section is formed in a substantially hat shape.
Further, the distal end surface of the collar portion 72 of the valve seat 70 surrounds the outer peripheral side surface of the liquid introduction tube 12 and is formed into a shape that can be slidably brought into contact with the outer peripheral side surface. A thin cylindrical first seal portion 73) protruding downward from the distal end surface of the flange portion 72 is formed.

Moreover, the thin cylindrical first seal portion 73 is formed in a tapered shape whose diameter gradually decreases toward the tip.
In this way, by forming the taper shape, the inner peripheral side surface of the first seal portion 73 is liquid even when the inner peripheral side surface of the first seal portion 73 slides with respect to the outer peripheral side surface of the liquid introduction tube 12. The state in contact with the side surface of the introduction pipe 12 is maintained (that is, in the present embodiment, since the valve seat 70 is made of resin, the first seal portion 73 is easily bent).
Further, a second seal portion 74 that is formed on the outer periphery of the first seal portion 73 and protrudes in a cylindrical shape concentric with the first seal portion 73 is formed on the lower surface of the flange portion 72 of the valve seat 70.

And the said valve seat 70 is attached to the applicator W as shown below.
Specifically, the valve seat 70 has a cylindrical body 71 inserted and fitted into the opening at the tip of the spring receiver 42 (the cylindrical body 71 is mounted in the cylinder of the spring receiver 42).
Further, the flange portion 42 a at the distal end of the spring receiver 42 and the flange portion 72 at the distal end of the valve seat 70 are sandwiched between the protrusion 30 a formed on the inner wall surface of the inner tip shaft 30 and the front end edge 20 c of the inner cylinder 20. The Thereby, the spring receiver 42 and the valve seat 70 are fixed to the inner cylinder 20 and the inner front shaft 30. In addition, the first seal portion 73 and the second seal portion 74 formed at the lower end of the valve seat 70 are supported by the bottom portion 30 b of the valve seat 72.

The liquid insertion tube 12 is inserted through the inner peripheral side surface of the first seal portion 73 and the through hole 71 c of the valve seat 70.
Thereby, when the user knocks the rear end of the inner cylinder 20, the inner peripheral side surface of the first seal portion 73 of the valve seat 70 is slid with respect to the outer peripheral side surface of the liquid introduction pipe 12. .

And since the side surface of the liquid introduction pipe | tube 12 is covered by the 1st seal part 73 formed in the front-end | tip of the collar part 72 of the valve seat 70 by the said structure, the liquid leakage from the liquid introduction pipe | tube 12 is prevented.
In this embodiment, since the outer peripheral side surface of the first seal portion 73 is covered with the second seal portion 74, the coating liquid that has passed through the first seal portion 73 can be shielded by the second seal member 74. it can.
Thereby, according to this embodiment, the liquid leakage of the coating liquid discharged to the liquid introduction pipe | tube 12 from the valve set 40b attached to the front-end | tip of the inner cylinder 20 can be prevented effectively.

  Thus, in this embodiment, the seal part (the 1st seal | sticker part 73 and the 2nd seal | sticker part 74) which prevents the liquid leak from the liquid introduction pipe | tube 12 in the lower end of the valve seat 70 is provided. Therefore, in this embodiment, a dedicated component (for example, rubber packing) for preventing liquid leakage from the liquid introduction pipe 12 can be eliminated.

In the present embodiment, the valve seat 70 is formed of a resin such as polyethylene (for example, high density polyethylene (HDPE)), so that the permeation amount of the coating liquid can be reduced. As a result, the applicator W of this embodiment can suppress drying of the applicator 11 as compared with the applicator of the prior art described above.
The valve seat 70 is made, for example, by integrally molding resin.

  Next, regarding the operation of the applicator W of the present embodiment, when the rear end portion of the inner cylinder 20 is not knocked, the inner cylinder 20, the inner front shaft 30, the spring receiver 42, and the valve seat 70 are 44, the rear end portion of the valve seat 70 abuts against the second support portion 41 c 2 of the valve rod 41. Since the first seal portion 73 of the valve seat 70 is in contact with the outer peripheral side surface of the liquid introduction tube 12, liquid leakage from the liquid introduction tube 12 is prevented. Further, since the outer peripheral side of the first seal portion 73 is covered with the second seal portion 74, the coating liquid that passes through the first seal portion 73 is shielded by the second seal portion 74.

  Further, when the user pushes the rear end of the inner cylinder 20 (pushes the finger toward the tip side), the inner front shaft 30, the spring receiver 42 and the valve seat 70 fixed to the tip of the inner cylinder 20 Along with the cylinder 20, it is biased toward the rear end side.

As a result, the spring 44 held between the valve body 41 a of the valve stem 41 and the spring support 42 b of the spring receiver 42 is compressed. Further, in this case, the rear end of the rod part 41 b of the valve rod 41 passes through the opening at the rear end of the spring receiver 42.
In this case, the first seal portion 73 of the valve seat 70 moves to the distal end side with the movement of the inner cylinder 20 in a state where the first seal portion 73 is in contact with the outer peripheral side surface of the liquid introduction pipe 12.

  Further, when the user stops pushing into the rear end portion of the inner cylinder 20 (for example, when a finger is released from the rear end of the inner cylinder 20), the inner cylinder 20 is urged toward the rear end side by the spring 44. The

  As described above, according to the present embodiment, liquid leakage from the liquid introduction pipe 12 is caused by the first seal portion 73 and the second seal portion 74 formed at the distal end portion of the valve seat 70 constituting the valve set 40b. Has been made to prevent.

Further, in this embodiment, the valve seat 70 having the function of a sealing member is formed of a resin such as polyethylene, so that the amount of coating liquid permeated can be reduced as compared with the case of sealing with a rubber packing.
As a result, according to the present embodiment, for example, even when a solvent-based coating liquid is stored in the inner cylinder 20 for a long period of time, the permeation amount of the solvent component is small. The decline in performance (performance) is suppressed.

FIG. 2 is a drawing of the inner cylinder 20 in the present invention. 2A is a cross-sectional view of the entire inner cylinder 20, and FIG. 2B is an enlarged view of a part of the dotted frame E in the inner cylinder 20 of FIG.
The inner cylinder 20 has a two-layer structure of an inner layer 20a that comes into contact with the filled coating liquid and an outer layer 20b that comes into contact with the outside air. The inner layer 20a is preferably made of a highly transparent material that is not eroded by the coating solution, such as polyethylene naphthalate (PEN). The outer layer 20b is configured such that the inner layer 20a covering the periphery of the inner layer 20a is not exposed to the outer peripheral side of the shaft. The outer layer 20b is preferably made of a material that is resistant to dropping impact of the inner cylinder 20 onto the ground or the like, such as polyethylene terephthalate (PET).

The wall thickness A of the inner layer 20a is 0.1 to 1.2 mm, preferably 0.3 to 1.2 mm. When the thickness is less than 0.1 mm, the strength is insufficient and the molding becomes difficult. If the thickness exceeds 1.2 mm, the moldability is difficult.
The outer layer 20b has a thickness B of 0.5 to 1.2 mm, preferably 0.7 to 1.2 mm. When the thickness is less than 0.5 mm, the impact resistance is lacking and the effects of the invention cannot be obtained. If the thickness exceeds 1.2 mm, the moldability is difficult.
The wall thickness C of the inner cylinder 20 is 0.6 to 2.4 mm, preferably 1.0 to 2.4 mm. When the thickness is less than 0.6 mm, the difficulty of molding increases. Further, when the thickness exceeds 2.4 mm, the moldability is difficult, and when the outer diameter of the inner cylinder 20 is the same, the volume that can be filled with the inner solution decreases.

  The inner cylinder 20 may be manufactured by an injection molding method, an extrusion molding method, a blow molding method, or the like as long as it can be molded, but a manufacturing method by blow molding is particularly desirable.

Examples of the present invention will be described below.
The sample of the Example produced 20 each of the inner cylinder 20 of embodiment in invention by blow molding. The contents of creation are described in Table 1. Note that Comparative Examples 1 to 3 have a single-layer structure rather than a two-layer structure.

The evaluation method will be described.
As for visibility, a yellowish red and a bluish red nail enamel solution were prepared, each 10 pieces were accommodated in the inner cylinder 20, and visual sensory evaluation of the appearance color was carried out by monitoring 20 people. The evaluation criteria are as follows.
○ Color difference is clearly △ Slightly different × Cannot be judged

The drop cracking was made by vertically dropping the applicator W shown in FIG. 1 filled with 4 g of nail enamel liquid onto the concrete from a height of 1 m, and visually judging the appearance of the inner cylinder 20. The evaluation criteria are as follows.
○ No cracks were seen × Cracks were confirmed

The gas barrier property is that the inner cylinder 20 is filled with 4 g of nail enamel solution, the valve set 40b is set, and the cartridge body is screwed with the inner front shaft 30 to form a cartridge body before and after standing for one month in a 50 degree environment. The weight loss value of the nail enamel solution was measured by measuring the weight difference. The evaluation criteria are as follows.
Weight loss value is 150 mg or less x Weight loss value is 150 mg or more

The sliding property is a yellowish red and bluish red nail enamel solution, each of which is accommodated in the inner cylinder 20 and mounted on the main body 10 of the embodiment of the present invention, and 35 degrees 80%. After being left in the environment for one week, a tactile sensory test was conducted by knocking the rear end of the inner cylinder 20 toward the front end. The evaluation criteria are as follows.
○ It was possible to knock smoothly × The above evaluation results that were caught during operation and could not be knocked sufficiently were listed in Table 2. The number written in the frame is the number.

  From the above experimental results, the applicator using the inner cylinder of the present invention is an applicator equipped with an inner cylinder having good visibility of the internal solution, strong against drop impact, gas barrier properties, and slidability. It is a useful invention.

W applicator 1 outer cylinder 2 tip shaft 10 main body 11 application part 12 liquid introduction pipe 12a hollow part (liquid introduction pipe)
13 Head-holding member 20 Inner cylinder 20a Inner layer (inner layer)
20b Outer layer (inner layer)
20c front end edge 22 stirring ball 30 inner tip shaft 30a protrusion (inner tip shaft)
30b Bottom (inner tip shaft)
40b Valve Set 41 Valve Rod (Valve Set)
41a Valve body (valve stem)
41b Rod body (valve rod)
41c1 1st support part (valve stem)
41c2 2nd support part (valve stem)
42 Spring holder (valve set)
42a collar (spring receiver)
42b Spring support (spring receiver)
44 Spring (Valve Set)
50 Cap 70 Valve seat (valve set)
71 Cylindrical part 71a Opening (valve seat)
71b Opening (valve seat)
71c Through hole (valve seat)
72 Buttocks (valve seat)
73 First seal (valve seat)
74 Second seal (valve seat)
A Thickness of inner layer (inner layer) B Thickness of outer layer (inner layer) C Thickness of inner cylinder

Claims (3)

A cylindrical main body with a coating portion attached to the tip, and a replaceable liquid that is filled with a coating solution and is stored in the main body cylinder so that the axial direction of the main body can be moved, and is partially exposed from the main body cylinder. An applicator comprising an inner cylinder and a valve set attached to the tip of the inner cylinder,
The inner cylinder has a two-layer structure, and the inner layer and the outer layer are formed of different resins, and the inner cylinder includes at least polyethylene naphthalate (PEN) in the inner layer with respect to the axial direction. And at least polyethylene terephthalate (PET) . Applicator of claim 1 wherein the thickness of the inner layer of the inner cylinder A, when the thickness of the outer layer and B and satisfies all the range of the following condition.
0.1mm ≦ A ≦ 1.2mm
0.5mm ≦ B ≦ 1.2mm The applicator according to claim 1 or 2, wherein the inner cylinder is formed by a blow molding machine.

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