JP5090109B2 - Applicator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an applicator which can simply apply a liquid such as an adhesive, a sealing material and a coating by pressurizing a vessel with a hand, and also uniformly apply in a width direction with a fixed width. <P>SOLUTION: The applicator comprises a vessel for containing the liquid and a nozzle attached to the opening of the vessel, wherein the nozzle has a structure which keeps the cross-section area of the inside of the nozzle gradually reduced from the junction with the vessel to an ejection port at the tip end of the nozzle, makes the tip end of the nozzle serve as a slit-like ejection port, and the center part of the inside of the nozzle serve as the flow path of the liquid narrower than that on both sides curved inside, with a guide provided at one side end part or both end parts of the ejection port of the nozzle. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

  The present invention relates to a liquid applicator such as an adhesive, a sealing material, and a paint.

  Conventionally, when a liquid material such as an adhesive, a sealing material, or a paint is uniformly applied with a certain width and thickness, the liquid material is previously dripped thickly on a base material and leveled using a spatula or a brush. . For this reason, the amount of liquid applied is likely to be uneven, and unevenness may occur, resulting in a smooth finish. In addition, there is a problem that the leveling work takes time and skill is required. In addition, the adhesive can be applied uniformly in a comb-like shape with the adhesive applicator proposed by the present applicants (see Patent Document 1), but there is a problem in the appearance if the combs remain without being leveled. There was also a case of causing.

Utility model registration No. 3106430

  The present invention has been made in view of such a current situation, and liquids such as adhesives, sealing materials, and paints can be easily applied by manually pressurizing the container, and the width is constant and the width direction. An object of the present invention is to provide an applicator that can be applied uniformly to the skin.

The means of the present invention taken in order to solve the above-mentioned problem is composed of a container for storing a liquid substance and a nozzle attached to the opening of the container, and the shape of the nozzle is changed from the joint with the container to the nozzle. toward the distal end of the discharge port, a structure in which the cross-sectional area of the nozzle gradually decreases, and state, and are to the nozzle tip has a applicator is a slit-shaped discharge opening, the center of the internal above nozzle part is Ri der that the flow path is narrow applicator of liquid material from both sides curved inward, Ru der that the applicator has a guide on one end or both ends of the discharge port of the nozzle.

  According to the present invention, since the cross-sectional area inside the nozzle is gradually reduced, the application amount can be easily adjusted, and the discharge port at the tip of the nozzle is formed in a slit shape, so that the application width and the application amount in the width direction can be reduced. It can be made uniform. Further, the uniformity of the coating width and the coating amount in the width direction can be further improved by curving the central portion inside the nozzle inward and narrowing the flow path of the liquid material from both sides. Further, by providing a guide at the nozzle discharge port, the contamination at the nozzle tip discharge port is reduced, the number of cleaning of the discharge port is reduced, and workability is improved.

  In addition, in the case where a flexible adherend is laminated on the applied liquid material, since there are no crevices on the liquid material, the liquid material is used when the components of the adherend move to the liquid material over time. The finish and appearance can be improved without causing discoloration of the adherend of the comb-like portion.

  The applicator of the present invention will be described in detail with reference to the drawings. The applicator of the present invention is configured as shown in FIG. 1 with a container for storing a required amount of liquid material and a nozzle that is attached to the opening of the container and discharges the liquid material in the container.

As a container used in the present invention, a container made of a plastic material having a solvent resistance which is not affected by a solvent contained in a liquid material contained therein, or a plastic film or an aluminum foil having a solvent resistance on the surface of a cardboard In the case of the former plastic container, since the contents are discharged by manually pressurizing the container, the container is flexible and has an internal volume of 2 It is preferable to set it as * 10 < ⁵ > -1 * 10 < ⁶ > mm < ³ > (200-1000 ml). In the case of the latter container made of cardboard, since the discharge operation is performed using a discharge device such as a caulking gun or a sealing gun, it is the size of the container that can be mounted on the discharge device, and the internal capacity is 1.5 × 10 ⁵ to 5 × 10 ⁵ mm ³ . Examples of the solvent-resistant plastic material include polypropylene resin, polyethylene resin, urethane resin, polyamide, polyester resin, etc. In consideration of moldability and flexibility in containers, polypropylene resin, polyethylene resin, and urethane resin are used. preferable.

  The coating nozzle is made of a solvent-resistant plastic material and is directly attached to the opening of the container. In consideration of the sealing property of the container and the nozzle, the opening of the container is externally threaded and the inner periphery of the nozzle. Preferably, an internal thread corresponding to the external thread of the container opening is formed. Moreover, this makes the container and the nozzle detachable and can be replaced.

  The liquid material accommodated in the container is not limited to the adhesive and the sealing material, but may be other coating materials such as a paint and a primer. The viscosity of the liquid material is preferably 2,000 to 100,000 mPa · s, more preferably 5,000 to 60,000 mPa · s. When the viscosity is 100,000 mPa · s or more, a strong pressing force is required when discharging, and thus workability tends to be deteriorated. Conversely, when the viscosity is less than 2,000 mPa · s, the viscosity is low, and thus the discharge port. May flow out of the air naturally, making it difficult to control the discharge by pressurization.

  The shape of the coating nozzle is preferably a slit-shaped discharge port as shown in FIG. 7, and has a fan-shaped shape extending from the container opening toward the nozzle discharge port. As a result, the liquid material can be applied not only to the central portion but also to both end portions, and can be stably applied with a constant thickness and width.

As shown in FIG. 6, the internal shape of the coating nozzle needs to gradually decrease as the cross-sectional area inside the nozzle moves toward the nozzle discharge port. The reduction rate of the cross-sectional area inside the nozzle [(cross-sectional area of the opening of the container) − (cross-sectional area of the nozzle outlet) / (cross-sectional area of the opening of the container) × 100] is preferably 60 to 97%, 75 -95% is more preferable. By setting the reduction rate of the cross-sectional area inside the nozzle to 60 to 97%, when the liquid material is discharged by pressurization, the pressure is applied inside the nozzle, so that the adjustment of the coating amount becomes easier.
Further, as shown in FIG. 5, it is preferable that the coating nozzle inner central portion is gradually curved inward to narrow the liquid passage in the central portion compared to both sides. As a result, the liquid material that has passed through the opening of the container spreads not only at the central portion but also at the end portion, and in combination with the effects described later of the slit-like discharge port, it is possible to discharge the liquid material more uniformly in the width direction. On the other hand, the film thickness can be made uniform.

  By making the discharge port of the coating nozzle into a slit shape, the coating width of the liquid material and the coating amount in the width direction can be made uniform. Although depending on the viscosity of the liquid to be applied and the coating thickness, the gap between the discharge ports is preferably in the range of 0.1 to 2.0 mm in view of the uniformity of the film thickness in the width direction. 5 mm is more preferable. When the viscosity of the liquid to be applied is high, the gap between the discharge ports is wide.When the viscosity is low, the gap is narrow.When the coating thickness is increased, the gap between the discharge ports is wide. It is preferable to narrow the gap between the discharge ports.

  The gaps at the left and right and the center of the slit-like discharge port of the coating nozzle may be the same, but it is more preferable that the gaps at both ends are slightly wider than the gap at the center. This further increases the uniformity of the coating film pressure in the width direction.

  The width of the slit-like discharge port of the coating nozzle is arbitrarily determined according to the coating width of the liquid material on the adherend, but considering the coating workability, the range of 20 to 100 mm is good and the film thickness is uniform. Considering the properties, 30 to 75 mm is more preferable.

  The application nozzle may be an integrated type, but it is preferable that the coating material is open / closed so that the liquid material adhering to the inside of the nozzle can be cleaned and used repeatedly, or composed of about 2 to 5 parts. For example, there are two upper and lower parts as shown in FIGS. 2, 3 and 5, and three tip and upper and lower parts as shown in FIG. The white lines on the left and right in FIG. 5 indicate that the nozzle is composed of upper and lower parts. As for the above 2-5 parts fitting method, it is necessary to have a fitting and sealing property that can withstand it so that liquid is not leaked from the gap of the fitting part when applying pressure, and tightening fixing with screws etc. Is preferred.

  It is preferable to provide a guide on one or both sides at the end of the discharge port of the coating nozzle. As a result, the liquid material discharged when discharging the liquid material does not need to contaminate the vicinity of the discharge port at the tip of the nozzle, and a uniform amount can be applied more stably when continuously applied. . Moreover, if it applies and applies to a linear thing like a ruler using a guide, it will also be possible to apply in a straight line continuously.

  In order to confirm whether the liquid is filled in the nozzle at the beginning of use, the nozzle is preferably transparent or translucent. Moreover, although a nozzle may be colored, it is better to have transparency as mentioned above even if colored.

  In the method of using the applicator of the present invention, in the case of a flexible container, an appropriate amount of liquid material is injected into the container and the nozzle is attached to the container. With the nozzle of the applicator down, press the container by hand to apply pressure, push out air from inside the nozzle, and confirm that liquid material comes out from the discharge port. Next, while pressurizing the container by hand, the discharge port may be applied on the application surface and pulled backward. Since the coating thickness can be adjusted by adjusting the speed at which the applicator is moved and the pressure with which the container is manually pressed, the liquid material can be applied continuously and simply. In the case of a cylindrical cardboard container, it is applied in the same manner as in the case of a flexible container while the container is mounted on a caulking gun and pressurized.

EXAMPLES Hereinafter, although an Example and a comparative example are given and this invention is demonstrated in more detail, this invention is not limited to these Examples.
The oiling port of Euler (made of polyethylene resin, internal volume: 4 × 10 ⁵ mm ³ , opening cross-sectional area: 300 mm ² ) marketed for oil squeezing was removed and only the main body was used as a container.

<Evaluation sample preparation method>
The following two points were used as liquids for evaluation.
Liquid 1: Stirred two-component urethane paint (for the start-up of our company's Ronretane, viscosity: 30,000 mPa · s)
First, pressure was applied manually by using each of the applicators of Examples and Comparative Examples described later on a PET film, and the above two-component urethane paint was applied in a straight line.
After curing for one week, the cured urethane coating film was peeled off from the film to obtain a sample for evaluation.
Liquid 2: Solvent-type vinyl chloride resin paint (our proof sealer, viscosity: 3,000 mPa · s)
First, pressure was applied manually by using each of the applicators of Examples and Comparative Examples described later on a PET film, and the above-mentioned solvent-type vinyl chloride resin-based paint was applied in a straight line.
After drying for 3 days, the coating film made of vinyl chloride resin was peeled off from the film to obtain a sample for evaluation.

<Evaluation method and evaluation criteria>
Each evaluation item was evaluated by the following evaluation method and evaluation criteria.
[Uniformity of coating thickness]
About the sample for evaluation obtained above, the thickness of three points of the center part and the left and right end parts in the width direction was measured at intervals of 100 mm, and evaluated according to the following criteria.
(Evaluation criteria)
○: The thickness of 3 points in the coating film width direction is within ± 10% of the average value of 3 points.
Δ: Thickness at 3 points in the coating film width direction is ± 10% or more of the average value of 3 points and within ± 15%.
X: Thickness at three points in the coating film width direction is ± 15% or more of the three-point average value.
[Consistency of coating width]
The width of the sample for evaluation obtained above was measured at intervals of 100 mm and evaluated according to the following criteria.
(Evaluation criteria)
○: The difference between the maximum width and the minimum width of the coating film width is less than 3 mm.
Δ: The difference between the maximum width and the minimum width of the coating width is 3 mm or more and less than 5 mm.
X: The difference between the maximum width and the minimum width of the coating width is 5 mm or more.
[Discharge port contamination]
The coating process for preparing the sample for evaluation was repeated 10 times and evaluated according to the following criteria.
(Evaluation criteria)
○: The discharge port was not soiled with a solidified liquid material, and could be applied without continuous 10 cleanings.
Δ: The discharge port is soiled with a solidified liquid material and cannot be applied without cleaning for 10 consecutive times.
It was able to apply after cleaning the discharge port on the way.

<Examples 1-3>
The gap and width of the slit-like discharge port at the nozzle tip and the rate of reduction of the cross-sectional area inside the nozzle are shown in Table 1, and the center inside the nozzle is curved inward as shown in FIG. 5, and guides are provided at both ends of the discharge port. The nozzle provided with the upper part is composed of two parts, upper and lower parts made of urethane, and the upper and lower parts are screwed and attached to the container to obtain an applicator. Table 1 shows the results of evaluation by the method described above.

<Examples 4 to 6>
Tables 1 and 2 show the clearance and width of the slit-shaped discharge port at the nozzle tip, and the reduction rate of the cross-sectional area inside the nozzle. Guides are provided at both ends of the discharge port, and a one-piece polypropylene resin nozzle is installed. It attaches to the said container and it is set as an applicator, it evaluates by the above-mentioned method, The result is shown in Table 1,2.

<Examples 7 to 9>
Table 2 shows the gap and width of the slit-shaped discharge port at the nozzle tip, and the reduction rate of the cross-sectional area inside the nozzle. No guides are provided at both ends of the discharge port, and the central part inside the nozzle is inward as shown in FIG. The curved nozzle is composed of two upper and lower parts made of polyamide resin, and the upper and lower parts are screwed and attached to the container to make an applicator. The applicator is evaluated and the results are shown in Table 2.

<Examples 10 to 12>
Tables 2 and 3 show the clearance and width of the slit-shaped discharge port at the nozzle tip and the reduction rate of the cross-sectional area inside the nozzle. No guide is provided at both ends of the discharge port, and the nozzle is made of urethane as shown in FIG. The top part, top part, and bottom part are composed of 3 parts, and the top and bottom parts are screwed so that the top part is sandwiched and attached to the container to make an applicator. Show.

<Comparative Example 1>
As shown in FIG. 8, a one-part open / close nozzle made of polypropylene resin having a discharge port (hole diameter: 3 mm, hole interval: 3 mm, nozzle tip width: 53 mm) provided with eight holes at the nozzle tip The applicator was attached to the container by screwing the opening and closing part, evaluated by the above-described method, and the results are shown in Table 3.

＊１：ノズル内部の断面積の減少率（％）
＊２：ノズルの吐出口スリットの間隙（ｍｍ）、幅（ｍｍ）
＊３：スリット間隙により塗膜厚みを変えてある（ｍｍ）
＊４：液状物１を１に、液状物２を２と表す。

* 1: Reduction rate of the cross-sectional area inside the nozzle (%)
* 2: Nozzle outlet slit gap (mm), width (mm)
* 3: The coating thickness is changed by the slit gap (mm)
* 4: Liquid 1 is 1 and Liquid 2 is 2.

  With the applicator of the present invention, a bonding agent such as an adhesive or a sealing material can be uniformly applied to the entire surface, not partially, to adhere to the adherend, and the thickness of the coating film such as paint can be made constant Can be used widely in each industry.

It is a perspective view which shows the use condition of the applicator of this invention. It is a horizontal sectional view of a nozzle with a guide consisting of two parts on the upper and lower sides. It is a horizontal sectional view of the nozzle without guide which consists of two upper and lower parts. It is a horizontal sectional view of the nozzle without guide which consists of a tip and three upper and lower parts. FIG. 6A is a vertical sectional view of the nozzle of the XX portion, and FIG. 5B is a vertical sectional view of the nozzle of the YY portion. (C) is a vertical sectional view of the nozzle of the XX section, and (d) is a vertical sectional view of the nozzle of the YY section. It is a front view of the nozzle tip which shows a slit-shaped discharge port. It is a front view which shows the nozzle tip of a comparative example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Liquid coating film 2 Container 3 Nozzle 4 Screw 5 Guide 6 Discharge port 7 Nozzle tip part 8 Nozzle upper part 9 Nozzle lower part

Claims (2)

It is composed of a container for storing a liquid substance and a nozzle attached to the opening of the container, and the shape of the nozzle gradually increases from the joint with the container toward the discharge port at the tip of the nozzle, and the cross-sectional area inside the nozzle gradually increases. in the structure decreases to, and, the nozzle tip Ri discharge opening der slit-shaped, applicator, wherein the flow path of the liquid product from both sides the central portion of the inside the nozzle is curved inward narrow . The applicator according to claim 1, wherein a guide is provided at one end or both ends of the discharge port of the nozzle.

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