TW201348088A - Check valve - Google Patents

Abstract

n order to suppress resistance during discharge of a liquid from a container, and, when stopping discharge of the liquid, in order to keep air from penetrating into the container and to stop the dripping phenomenon, this check valve is provided with an elastic protruding body (2) which having an opening and closing part (5) for discharging the liquid, a movable film (3) which is connected to the protruding body (2) and is displaced in accordance with the change in pressure during liquid discharge operations from the opening and closing part (5), and a movable film support body (4) which displaceably supports the movable film (3) in a prescribed position of the liquid discharge part (11) of the flexible liquid container, wherein the liquid (20) retained in the liquid discharge part (11); during discharge of the liquid from the flexible liquid container is drawn towards said check valve (1) by the movable film (3) moving back to the initial state after liquid discharge.

Description

Check valve

The present invention relates to a check valve. More specifically, the present invention relates to an improvement in the structure of a check valve provided in a liquid discharge port of a flexible liquid container.

In order to prevent deterioration of quality by oxidizing a fluid or liquid substance (hereinafter, simply referred to as a liquid) such as foods, beverages, pharmaceuticals, quasi-drugs, pharmaceuticals, cosmetics, etc., it has previously been used to suppress oxidation of a liquid as a content. A vacuum type container (for example, refer to Patent Document 1).

In the container described in Patent Document 1, a check valve that prevents air from entering the container is attached to the liquid discharge port of the container. The check valve is configured to include a configuration in which a dome-shaped head is provided with a slit, and the slit is opened when pressure is applied to a discharge direction of the liquid, and vice versa, when pressure is applied to the filling direction, thereby The sealing effect (hereinafter, also referred to as a check-back effect) of preventing air from intruding into the container from the outside of the container when the liquid is stopped is exerted.

[Previous Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open No. Hei 10-338239

However, the prior container including the check valve described above has a non-return effect, but there is a case where the container is tilted to discharge the liquid in the container and then again When the device is erected, the droplets attached to the discharge port may drip and adhere to the periphery of the discharge port, the outflow port or the top cover, or even if the liquid droplets do not leave from the discharge port and remain, when the top cover is closed The liquid remaining in the discharge port overflows to the discharge port due to the sealing plug attached to the top cover, and contaminates the periphery of the discharge port, the outflow port or the top cover, etc. (hereinafter, also referred to as dripping phenomenon). On the other hand, a method of making the front end of the discharge port thin can be taken as a countermeasure against such a dripping phenomenon, but the current situation is that it is necessary to reduce the diameter of the front end to be effective, and it is necessary to rely on the empirical value, and if the front end of the discharge port is too thin The resistance is increased when the liquid is discharged from the container, and the liquid discharge amount is reduced and it is not convenient to use.

Accordingly, it is an object of the present invention to provide a check valve which is attached to a liquid discharge port of a flexible liquid container and which suppresses the resistance when liquid is discharged from the container, and does not cause the liquid to be discharged when the liquid is stopped. Air invades into the container and suppresses dripping.

In order to solve the above problems, the inventors conducted various studies. For example, in order to effectively suppress the dripping phenomenon as described above, a check valve such as a nipple for a feeding bottle (for example, refer to Japanese Patent Laid-Open Publication No. 2008-534101) is used as a check valve. The position directional valve is a feeding bottle configured to prevent the liquid from leaking out of the feeding bottle and introducing air into the feeding bottle instead of the liquid sucked from the feeding bottle through the nipple, and the check valve is disposed away from the nipple of the nipple. With the nipple, a slight improvement effect can be obtained in terms of the dripping phenomenon, but when the liquid is discharged, the one-way valve becomes a resistance and the discharge amount of the liquid becomes small, so that a satisfactory check valve cannot be obtained. The inventors who have conducted further research focusing on the above aspects have acquired new insights into the solution to the above problems.

The present invention is based on the above findings, and is a check valve provided in a liquid discharge portion of a flexible liquid container, and is characterized by comprising: a protrusion provided with an opening and closing portion for discharging a liquid, and having elasticity a movable film connected to the protruding body and displaced according to a pressure change from a liquid discharge operation of the opening and closing portion; and a movable film support body The specific position of the liquid discharge portion of the flexible liquid container is displaceably supported by the movable film; and after the liquid is discharged, the movement of the movable film to the initial state is performed when the liquid is discharged from the flexible liquid container. The liquid of the liquid discharge portion is introduced to the check valve side.

In the check valve, when the liquid is discharged, the movable film is moved to the end side before the liquid discharge port by the pressure change accompanying the liquid discharge operation, and the slit of the protrusion is opened to discharge the liquid. After the liquid is discharged, if the pressure (internal pressure) acting on the check valve becomes low, the slit is closed, and the liquid discharged from the check valve but not dropped from the container is stored in the liquid discharge port. When the pressure (internal pressure) acting on the check valve is lowered, the movable film that has moved toward the distal end side is returned to the initial state in a state where the slit is closed. When the state is restored to the initial state, the movable film introduces the liquid stored in the liquid discharge port toward the check valve side, and suppresses the subsequent dripping phenomenon (in the present specification, the phenomenon of introducing the liquid in this manner is also called For suckback). Further, after the liquid discharge operation is completed, the slit of the projection is kept closed before the start of the next liquid operation, and the air is prevented from intruding into the container (liquid tightness). Further, according to the check valve, even if the front end of the liquid discharge port is not made thinner, the dripping phenomenon and the intrusion of air can be suppressed, so that the resistance at the time of liquid discharge is not increased as the front end of the discharge port is too thin.

In the check valve as described above, it is preferable that at least a part of the movable film is in a state of being recessed toward the body side of the flexible liquid container in the initial state.

Alternatively, it is preferable that at least a part of the movable film is located closer to the body side of the flexible container liquid container than the outer peripheral portion of the movable film supported by the movable film support in the initial state. In this case, the movable film may be placed closer to the center so as to be closer to the mortar side of the body side of the flexible container liquid container.

Further, in the check valve, it is preferable that at least a part of the movable film is curved in the radial direction.

Alternatively, in the check valve, it is also preferable that the movable film is meandered in the middle.

Further, it is preferable that the thickness of the movable film is equal to or less than the thickness of the head of the protruding body.

Further, it is also preferable that the thickness of the movable film is not uniform. Check valve in this case The thickness of the movable film may be varied along the radial direction of the check valve. Alternatively, the thickness of the movable film may be varied along the circumferential direction of the check valve.

Further, in the check valve, it is also preferable that the center of the projection is deviated from the center of the movable film.

Further, in the check valve, it is also preferable that the protruding body has a shape in which the tip end is tapered.

According to the present invention, it is possible to suppress the resistance when the liquid is discharged from the container, or to prevent the air from intruding into the container when the liquid is stopped, and to suppress the dripping phenomenon.

1‧‧‧ check valve

2‧‧‧ spurs

2a‧‧‧ front end

2b‧‧‧ Sidewall

2c‧‧‧ bottom

3‧‧‧ movable membrane

3a‧‧‧ outside the movable membrane

4‧‧‧ movable membrane support

5‧‧‧Incision (opening and closing)

10‧‧‧Flexible liquid container

10'‧‧‧Layered peeling container

11‧‧‧Liquid discharge department

12‧‧‧Exit

12a‧‧‧Liquid discharge

12b‧‧‧Top cover installation

12d‧‧‧Intersection of the outflow

12e‧‧‧ tubular part of the outlet (tubular body)

12f‧‧‧

13‧‧‧Top cover

13a‧‧‧ Sealing plug

14‧‧‧ Container body

20‧‧‧Liquid

20'‧‧‧ soy sauce

111‧‧‧Contents

112‧‧‧ outer container

113‧‧‧ container body

113a‧‧‧ mouth

114‧‧‧Spray outlet

115‧‧‧Spray cover

116‧‧‧Upper cover

116a‧‧‧Hinges

117‧‧‧Upper tube

117a‧‧‧Outer tube

117b‧‧‧Upper tube

118‧‧‧Under the tube

119‧‧‧ suction holes

120‧‧‧Connecting slot

121‧‧‧Mechanical bolt members

122‧‧‧Connected tube

123‧‧‧ Body tube components

123a‧‧‧Walls

124‧‧‧Inner tube

125‧‧‧Flange

126‧‧‧Outer tube

127‧‧‧Intermediate tube

128‧‧‧External gas flow holes

129‧‧‧ Male thread

130‧‧‧ Female thread

131‧‧‧ top face

132‧‧‧Clock Department

133‧‧‧External gas introduction protrusion

134‧‧‧External gas introduction hole

135‧‧‧ Receiving tube

136‧‧‧Spray

137‧‧‧Inside tube

140‧‧‧Inline tube

141‧‧‧Air Valve Department

142‧‧‧through holes

143‧‧‧Connected recess

147‧‧‧ 栓 body

D1‧‧‧ Inner diameter of the protrusion 2

D2‧‧‧Drug of the movable membrane support 4

D3‧‧‧Inner diameter of tubular part 12e

L1‧‧‧ length from the bottom 2c of the protrusion 2 to the end of the tubular portion 12e

Length of L2‧‧‧ spurs 2

L3‧‧‧ depth of incision

O‧‧‧ container shaft

Thickness of the head of the T1‧‧ horn 2

Thickness of T2‧‧‧ movable film 3

θ‧‧‧The angle between the protrusion 2 and the movable membrane 3

Fig. 1 is a perspective view showing a flexible liquid container in an upright state as an example of use of the check valve of the present invention.

Fig. 2 is a cross-sectional view showing a check valve assembled to an outlet of a top cover according to an embodiment of the present invention.

Fig. 3 is a cross-sectional view showing a configuration example of a check valve.

Fig. 4 is a schematic view for explaining an operation state of the check valve, wherein (A) shows an initial state, and (B) shows a state in which the container connected to the check valve is pressurized and deformed to discharge liquid from the container, and (C) shows Immediately after the pressure applied to the container is released, the state in which the liquid is discharged is stopped.

Fig. 5 is a cross-sectional view showing a check valve of another shape of the movable film.

Fig. 6 is a cross-sectional view showing the check valve of the movable film shown in Fig. 5 in order.

Fig. 7 is a cross-sectional view showing the check valve of the movable film shown in Fig. 5 in order.

Fig. 8 is a cross-sectional view showing the check valve of the movable film shown in Fig. 5 in order.

Fig. 9 is a cross-sectional view showing a check valve of another shape of the movable film.

Fig. 10 is a cross-sectional view showing a check valve of another shape of the movable film.

Fig. 11 is a cross-sectional view showing a check valve of another shape of the movable film.

Fig. 12 is a cross-sectional view showing a check valve of another shape of the movable film.

Fig. 13 is a cross-sectional view showing a check valve of another shape of the movable film.

Fig. 14 is a cross-sectional view showing a check valve of a shape of a movable film which is stepwise deformed.

Fig. 15 is a cross-sectional view showing a check valve of another shape of a movable film which is stepwise deformed.

Fig. 16 is a (A) plan view and a (B) sectional view showing a check valve of another shape example of a movable film which is stepwise deformed.

Fig. 17 is a cross-sectional view showing the check valve of the operation of the movable film shown in Fig. 14 in the order of (A) to (E).

Fig. 18 is a cross-sectional view showing a check valve of an example of a shape of a projecting body for further improving liquid tightness.

Fig. 19 is a cross-sectional view showing the check valve of the operation example of the projecting body shown in Fig. 18 in the order of (A) to (C).

Fig. 20 is a partial cross-sectional view showing the entirety of a laminated peeling container (flexible liquid container) according to another embodiment of the present invention.

Fig. 21 is a longitudinal cross-sectional view showing the action of the contents of the laminated peeling container (flexible liquid container) when it is ejected.

Fig. 22 is a longitudinal cross-sectional view showing the action of the laminated peeling container (flexible liquid container) after the contents are ejected.

Hereinafter, the configuration of the present invention will be described in detail based on an example of the embodiment shown in the drawings. Fig. 1 shows a film container as an example of a flexible liquid container 10 provided with a check valve 1, and Fig. 2 shows a schematic configuration of the periphery of the liquid discharge portion 11 of the flexible liquid container 10, which is shown in Fig. 3. An example of the structure of the check valve 1 of the present invention is shown in Fig. 4 as an example of the operation of the check valve 1.

The check valve 1 of the present embodiment includes a valve of the projecting body 2, the movable film 3, and the movable film support 4, and is provided in a tubular body (for example, a flow) of the liquid discharge portion 11 of the flexible liquid container 10. The tubular portion 12e) of the outlet 12 (see Fig. 2, etc.). The check valve 1 is constructed in such a manner that (a) does not become a resistance to discharge of the liquid 20 when the liquid 20 is discharged from the flexible liquid container 10 (including the difficulty in using the flexible liquid container 10) (b) the effect of preventing the intrusion of air into the flexible liquid container 10 when the discharge of the liquid 20 is stopped; (c) after the discharge operation of the liquid 20 is completed, The liquid 20 stored in the liquid discharge portion 11 of the flexible liquid container 10 is introduced to the check valve 1 side to suppress the sucking function of the subsequent dripping phenomenon.

(spike 2)

The projecting body 2 is configured such that the liquid 20 is stably discharged without causing the flow of the liquid 20 when the liquid 20 in the flexible liquid container 10 is discharged, and the external portion is prevented when the liquid 20 is stopped. The air intrudes into the flexible liquid container 10. At least the front end portion 2a of the projecting body 2 is provided with a slit (slit) 5 that opens according to the internal pressure (see Figs. 2 and 3).

The projecting body 2 of the present embodiment has a shape in which a hemispherical portion constituting the distal end portion 2a and a tubular portion constituting the side wall portion 2b are combined (see Figs. 2 and 3). However, this is only a preferred example. When other specific shapes are exemplified, it may be a hemispherical shape, a columnar shape such as a cylinder or an elliptical cylinder, or a triangular column, a quadrangular column or the like, or a chamfered column or a triangle. a polygonal tapered head portion (front end portion 2a) such as a cone or a quadrangular pyramid, and a tubular portion, a ring shape, a pipe shape, a tube shape, a tubular shape, and a hose-like body portion (side wall portion 2b) a combination of).

The projecting body 2 prevents the front end portion 2a and the side wall portion 2b from being deformed in an initial state before the liquid 20 is discharged, at the time of discharge or when the discharge is stopped, and the check effect is surely obtained (preventing air from the outside of the flexible liquid container 10) It is preferable to intrude into the tubular portion 12e of the outflow port 12 (see FIG. 2). Further, when the projecting body 2 is housed in the tubular portion 12e of the outflow port 12 in this manner, the following advantages (1) and (2) are further present. That is, (1) the projection 2 can be suppressed from being boring or meaninglessly fiddled or impacted. For example, if the end portion 2a and the side wall portion 2b are pinched or stabbed by a rod or the like before the check valve 1, the application is stopped. The force outside the assumed operating region of the check valve 1 and the outside of the assumed direction may impair the function as the check valve 1, but as long as it is configured as described above, the function can be suppressed from being damaged in this manner. (2) By accommodating the protrusion 2 into the tubular portion 12e of the outflow port 12, the liquid 20 stored in the liquid discharge portion 11 of the flexible liquid container 10 can be effectively or more reliably expressed to the check valve The phenomenon introduced on the 1 side (back suction function).

Here, the length of the protrusion 2 along the center line of the tubular portion 12e of the outflow port 12 is set to L2, and the bottom of the protrusion 2 (the portion of the base end supported by the movable film 3) 2c to the tube is formed. When the length of the end portion of the portion 12e is L1 (see FIG. 3), from the viewpoints of the above (1) and (2), L1>L2 is preferable. However, if L2 is too small, the depth (L3) of the cut amount for determining the discharge amount of the liquid 20 must be made small, so that the length is appropriately determined depending on the discharge amount of the liquid 20.

Further, in the relationship between the inner diameter (D1) of the projecting body 2 and the inner diameter (D3) of the tubular portion 12e, the relationship of D3 > D1 is satisfied. From the viewpoint of suppressing the performance of the dripping phenomenon (respiratory performance), it is preferably D3 > (D1/2), more preferably D3 > (D1/3).

Further, the projecting body 2 may not be located at the center of the movable film 3. Further, a plurality of protrusions 2 may be provided in one check valve 1.

(cut 5)

The slit 5 provided in the projecting body 2 as the opening and closing portion has a structure in which the tip end of the projecting body 2 is split, and the liquid 20 is allowed to pass when the liquid is discharged, and in addition to this, it is closed to prevent air from entering. The slit 5 of the present embodiment includes a fracture portion that is cut into a linear shape, but may include a slit, a broken line such as a broken line or a chain line, or the like. In the present embodiment, a linear slit 5 (see FIG. 2 and the like) is provided, but it may be curved. Also, the depth of the slits at both ends may be different. Further, the slit 5 may have one (1) or a plurality (multiple), and may be crossed when there are a plurality of strips. The slit 5 is preferably in a continuous linear configuration when the discharge amount of the liquid 20 is required to be large or when the viscosity of the liquid 20 is high, and conversely, the discharge amount of the liquid 20 is small. When it is desired to precisely control the discharge amount or when the viscosity of the liquid 20 is low, the slit 5 is more Good for pores or discontinuous construction.

Further, the slit 5 is preferably extended not only to the hemispherical portion (front end portion) 2a of the projecting body 2 but also to the cylindrical portion (side wall portion) from the viewpoint of opening the liquid more when the liquid is discharged. The depth of the incision (L3) of 2b (refer to Figs. 2 and 3).

Here, the length (L3) of the slit 5 is L2≧L3 with respect to the length (L2) of the protrusion 2, and preferably L2>L3. In the case of L2=L3, depending on the material of the material constituting the check valve 1, the viscosity or the property of the liquid 20, there is a case where the protruding body 2 is easily ruptured from the slit 5 due to the repeated use of the check valve 1. Therefore, it is preferable to set it suitably according to a material etc.. Further, the easiness of discharge of the liquid 20 is preferably 0.1 L2 ≦ L3 < L2, more preferably 0.5 L2 ≦ L3 < L2, still more preferably 0.8 L2 ≦ L3 < L2.

(movable film 3)

The movable film 3 is connected to the elastically deformable film of the above-described projecting body 2, and the outer peripheral portion 3a is supported by the movable film supporting body 4 at a specific position of the liquid discharge portion 11 of the flexible liquid container 10. The movable film 3 is displaced so as to bulge in conjunction with the pressure change during the liquid discharge operation, and thereafter, when returning to the original initial state, the dripping phenomenon is suppressed by the suckback phenomenon corresponding to the shift amount. In order to improve the suckback performance in the check valve 1, it is more effective to increase the amount of deformation of the movable film 3 when deformed by pressure fluctuation, as compared with the amount of deformation when the protrusion 2 is deformed by pressure fluctuation. . Specifically, it is effective to adopt the following methods: i) as the movable film 3, a material which is more elastically deformable than the protrusion 2; ii) the same material or elastic modulus is used for the protrusion 2 and the movable film 3 In the case of the same degree of material, the thickness (T2) of the movable film 3 is made thinner than the thickness (T1) of the head of the protrusion 2 or the like.

Further, the thickness T1 and the thickness T2 are also set depending on the material constituting the movable film 3 and the protrusion 2, the viscosity or the property of the liquid 20, and the discharge amount, but it is preferably 1 μm or more, and more preferably 2 μm or more. When the thickness of the movable film 3 and the projecting body 2 is too thin, there is a possibility that the pressure of the liquid 20 cannot be withstood and is damaged or broken during molding, and the thickness can be suppressed to a certain extent. However, if the ease of deformation or displacement is taken into consideration, T1 and T2 is preferably 50 mm or less.

The movable film 3 may be a film having the same flat surface in the initial state. However, if at least a part of the movable film 3 is recessed toward the main body 14 side of the flexible liquid container 10, the movable film 3 can be further moved. From the viewpoint of the amount of deformation of the film 3, it is preferable. In the present embodiment, the movable film 3 (see FIGS. 2 and 3) which is closer to the center and closer to the body 14 side of the flexible liquid container 10 in the initial state is used. In this case, when the angle (obtuse angle) between the protrusion 2 and the movable film 3 is θ (see FIG. 3), it is generally θ=10 to 170°, preferably θ=60~. 120°, and more preferably 91 to 120°.

Further, it is not necessary to make the thickness of the movable film 3 uniform, and for example, it may be formed so as to become thicker toward the movable film support 4 from the projecting body 2, or may be formed to be thinner. Alternatively, only a part of the movable film 3 may be formed thick or only a part of it may be thin. It is important that the movable film 3 is configured to realize a deformation amount sufficient to generate a sufficient suckback phenomenon.

(movable film support 4)

The movable film support 4 supports the outer peripheral portion 3a of the movable film 3 in a state in which the movable film 3 is displaceable (see FIG. 2 and the like). The movable film support 4 may be integrally formed with the protrusion 2 and the movable film 3, or may be formed separately and then attached to the movable film 3 or the like. The movable film support 4 of the present embodiment is formed into a tubular shape, an annular shape, a tubular shape, a sleeve shape, and a cylindrical shape aligned with the inner circumference of the tubular portion (for example, the tubular portion 12e of the outflow port 12) in the liquid discharge portion 11. Alternatively, the check valve 1 may be directly fixed to the liquid discharge portion 11 of the flexible liquid container 10 or to a tubular body (for example, the outflow port 12) connected to the flexible liquid container 10.

Further, the circumferential shape of the movable film support 4 is not limited to a circular shape, and the cross-sectional shape may be a polygonal shape such as an ellipse or a rectangle. Further, the movable film supporting body 4 may be inscribed in the tubular body (for example, the tubular portion 12e of the outflow port 12) as shown in Fig. 3, or may have a structure in which the movable film supporting body 4 also serves as a tubular body, or may be The structure of the movable film support 4 and the tubular body 6 is integrated.

Further, in the case where the movable film support 4 is inscribed in the tubular body (for example, the tubular portion 12e of the outflow port 12), it is preferably a movable film branch from the viewpoint of easiness of discharge of the liquid 20. The inner diameter (D2) of the support 4 is infinitely close to the inner diameter (D3) of the tubular body 6, but in terms of the strength, ease of formation, ease of handling, etc. of the movable film support 4 and the like, D3-D2 (i.e., The value of the movable film support 4 is preferably 2 μm or more, and more preferably 10 μm or more.

Moreover, it is preferable that the check valve 1 has a structure in which the movable film support 4 is easily disposed at a specific position of the liquid discharge portion 11. For example, by providing the step portion 12f on the inner circumference of the outflow port 12, the front edge 4a of the movable film support body 4 is brought into contact with the step portion 12f, and the movable film support body 4 or the check valve 1 is easily positioned as a whole. At a specific position of the liquid discharge portion 11 (see Fig. 2).

(constituting the material of the check valve 1)

In order to effectively find the effects of the above (a), (b), and (c), the material constituting the check valve 1 is preferably one which is easily elastically deformed and has a large tensile elongation. Specific examples thereof include synthetic resins such as polyethylene and polypropylene, and rubber materials such as elastomers, synthetic rubbers, and natural rubbers. Among them, elastomers and rubber materials are preferable.

Further, the projecting body 2, the movable film 3, and the movable film support 4 constituting the check valve 1 may be formed of different materials or may be formed of the same material. When the check valve 1 is used for a food container, it is preferably a polyoxymethylene rubber.

The hardness of the rubber material is 30 to 80 degrees, preferably 40 to 70 degrees, more preferably 50 to 60 degrees, as measured by the hardness test of the class A durometer of JIS K6253. The hardness can be measured by the material constituting the check valve 1 or by adding the following filler, and the valve 1 can be measured.

A filler can be added to the elastomer. As the filler, cerium oxide and carbon black which are reinforcing fillers are preferable. The cerium oxide may be either anhydrous cerium oxide or aqueous cerium oxide. These cerium oxides may be used as they are, or may be surface-treated with an organic hydrazine such as an organic chlorodecane, an organic alkoxy oxane, an organic polyoxy siloxane or a hexaorganic diazane.

As other fillers, calcined cerium oxide fine powder, titanium oxide powder Alumina powder, pulverized quartz, pulverized chalk, diatomaceous earth powder, aluminosilicate powder, magnesium oxide powder, aluminum hydroxide powder, iron oxide powder, zinc oxide powder, heavy calcium carbonate powder, zinc white , inorganic magnesium carbonate, activated calcium carbonate, magnesium citrate, aluminum citrate, titanium dioxide, talc, mica powder, aluminum sulfate, calcium sulfate, barium sulfate, glass fiber and other inorganic fillers, as well as polyester fiber, polyamide fiber Organic reinforcing agents such as vinylon fibers and aromatic polyamide fibers or organic fillers. In general, the content of the filler to the rubber material is 1 to 50% by weight, preferably 5 to 40% by weight. The average particle diameter of the filler is generally from about 0.1 to 50 μm, preferably from 1 to 40 μm.

An example of a method of adding a filler to the elastomer used in the check valve 1 of the present embodiment is a method in which a filler and, if necessary, other additives are blended in an elastomer to form a master batch. The masterbatch is mixed with an elastomer.

Further, as a crosslinking agent, 2,5-dimethyl-2,5-di(t-butylperoxy)hexyne-3, 2,5-dimethyl-2,5-di may also be added. (t-butylperoxy)hexane, 2,2-bis(t-butylperoxy)-p-diisopropylbenzene, dicumyl peroxide, di-tert-butyl peroxide, Tert-butyl oxybenzoate, 1,1-bis(t-butylperoxy)-3,3,5-trimethylcyclohexane, 2,4-dichlorobenzamide peroxide, Benzoyl oxime, p-chlorobenzamide peroxide, 2,4-diisopropylbenzene peroxide, dialkyl peroxide, or peroxyketal.

Examples of the additives other than the above include a plasticizer, a softener, a heat-resistant agent, an anti-aging agent, a lubricant, an adhesion-imparting agent, an anti-coking agent, a crosslinking accelerator, a crosslinking assistant, a promotion aid, and a crosslinking agent. Examples of the retardation agent, the colorant, the ultraviolet absorber, the flame retardant, the oil resistance improver, and the foaming agent include metal oxides, amines, fatty acids and derivatives thereof, and polydimethyloxyl Alkane oil, diphenyl decanediol, trimethyl stanol, phthalic acid derivatives, adipic acid derivatives, trimellitic acid derivatives, processing oil, coal tar, castor oil, calcium stearate, Phenylenediamines, phosphates, quinolines, cresols, phenols, dithiocarbamate metal salts, iron, cerium oxide, potassium hydroxide, iron naphthenate and naphthenic acid Potassium and so on.

(Flexible liquid container 10)

The flexible liquid container 10 may be a molded container formed by full-sheet molding, blow molding, injection molding, or the like, or may be bonded to a film including a single layer or a plurality of layers. In particular, a self-supporting bag including a multilayer film, or a so-called layered bottle in which the inner container is peelably laminated on the inner surface of the outer container (see, for example, Japanese Patent Laid-Open Publication No. Hei 03-133748, Japanese Patent Laid-Open No. 2009-149327, etc. The flexible liquid container 10 is preferably filled from the viewpoint of discharging the liquid 20 in the container and suppressing the intrusion of air into the container.

The flexible liquid container 10 preferably includes a plurality of layers, and preferably includes a base material layer constituting the outer layer, a sealant layer constituting the inner layer, and an adhesive layer for bonding the base material layer and the sealant layer, and further A gas barrier layer that achieves long-term storage of the liquid 20 in the flexible liquid container 10. The gas barrier layer may be a layer that absorbs oxygen, water vapor, carbon dioxide, and the like which may degrade the liquid 20 due to reaction with the liquid 20.

Further, the flexible liquid container 10 preferably has a layer that blocks light such as sunlight, ultraviolet rays, and infrared rays. Examples of the layer include an aluminum foil, an application of an ink having a light blocking function, and light reflection by multilayering.

As an application example in which the check valve 1 is applied to the flexible liquid container 10 as described above, for example, the check valve 1 is incorporated in an outlet 12 including a synthetic resin such as polyethylene or polypropylene, and the like. Sealing, high-frequency sealing, hot air sealing, microwave heating or ultrasonic sealing, etc. The flow outlet 12 with the check valve 1 and the plastic film and sheet containing polyethylene, polypropylene, polyester, polycarbonate, nylon resin, etc. The metal foil and the sheet or the flexible liquid container 10 of the composite film and the sheet which are constituent materials are joined, whereby the check valve 1 is placed at a specific position of the flexible liquid container 10. Further, as the flexible liquid container 10, a packaging material capable of exhibiting three functions (a) to (c) can be applied and provided.

(with the outlet 13 of the top cover 13)

The outflow port 12 includes a tubular portion 12e, a liquid discharge port 12a formed at a front end of the tubular portion 12e, a top cover mounting portion 12b formed on the outer periphery of the tubular portion 12e, and a lower portion of the cover portion 12b. The check valve fixing portion 12c and the joint portion 12d of the container body 14 are further attached to the lower portion thereof. A top cover 13 having a sealing plug 13a is attached to the top cover mounting portion 12b.

(liquid)

The liquid 20 that is filled into the flexible liquid container 10 is a fluid or liquid such as a food, a beverage, a pharmaceutical, or a quasi-drug, a pharmaceutical, or a cosmetic. Specific examples include a low-viscosity liquid substance such as water, an aqueous solution, an organic solvent, or a liquid dissolved in an organic solvent, and mayonnaise, a high-viscosity jelly-like substance, or a gel-like substance are also included in the filling. In the liquid 20 of the flexible liquid container 10 of the present embodiment.

(action of check valve 1)

Next, an outline of the operation of the check valve 1 of the present embodiment will be described with reference to Fig. 4 (see Figs. 3 and 4). 3 shows an initial state, FIG. 4(A) shows a state in which it is transferred from the initial state to the state in which the liquid 20 is discharged, and FIG. 4(B) shows pressure deformation of the flexible liquid container 10 connected to the check valve 1. In the state in which the liquid 20 is discharged from the liquid discharge portion 11, FIG. 4(C) shows a state immediately after the pressure applied to the flexible liquid container 10 is released and the discharge of the liquid 20 is stopped.

In the initial state shown in Fig. 3, the flexible liquid container 10 is in a posture such as a vertical position, and is in a non-use state (see Fig. 1). When the user picks up the flexible liquid container 10 so as to tilt the liquid discharge portion 11 downward, the liquid 20 is discharged to the state shown in FIG. 4(A).

In the state shown in Fig. 4(A), the slit 5 provided in the projection 2 is closed, and the movable film 3 is in a flat state (the same plane state).

Then, in the state shown in FIG. 4(B), the user presses the flexible liquid container 10 or presses it or the like to increase the internal pressure of the container or the gravity acting on the liquid 20 to the liquid 20 The discharge direction (lower in the drawing) is applied, and the slit 5 provided in the projection 2 is opened by the pressure of the liquid 20. Since the slit 5 is opened, the liquid 20 is stably discharged without becoming a resistance to the discharge of the liquid 20. Further, the movable film 3 has a pressure toward the outside air side by the above pressure. The manner of deformation is the effect of the assist when the slit 5 is opened.

4(C) shows a state in which the main factor for increasing the internal pressure of the container is removed, or the gravity acting on the liquid 20 is released by inverting the upper and lower relationship of the flexible liquid container 10 and the check valve 1. Since the above pressure is released, the internal pressure of the container becomes equal to or lower than the external air, and the slit 5 is closed, thereby preventing air from intruding into the flexible liquid container 10. Further, the movable film 3 deformed in a bulging manner is deformed so as to return to the side of the main body 14 of the flexible liquid container 10, and the liquid 20 stored on the outer side of the movable film 3 in the liquid discharge portion 11 is instantaneously sucked into the tubular body. (In the case of the present embodiment, it is the tubular portion 12e of the outflow port 12), and the dripping phenomenon is suppressed.

Further, in the case where the tubular body is plugged (in the case of the present embodiment, the top cover 13 covers the liquid discharge port 12a at the front end of the tubular portion 12e), the end portion exists before the tubular body (tubular portion 12e). The space can therefore be plugged in such a way that the liquid 20 does not leak out of the tubular body.

As described above, the check valve 1 of the present embodiment achieves the following effects: (a) does not become the resistance of the discharge of the liquid 20 when the liquid 20 is discharged from the flexible liquid container 10; (b) when the discharge of the liquid 20 is stopped. (c) introducing the liquid stored in the liquid discharge portion 11 to the check valve 1 side after the discharge operation of the liquid 20 is completed, and suppressing the subsequent dripping phenomenon.

In addition, the embodiment is a preferred embodiment of the present invention, and the present invention is not limited thereto, and various modifications may be made without departing from the spirit and scope of the invention.

(Other shapes of the movable film 3)

For example, in the above-described embodiment, as an example of the check valve 1 in which at least a part of the movable film 3 is recessed toward the main body 14 side of the flexible liquid container 10, a check valve in which the movable film 3 is recessed in a mortar shape is exemplified. 1 (refer to FIG. 3 and the like), in addition to the amount of deformation when the movable film 3 is deformed by pressure fluctuation, at least a part of the movable film 3 is located on the movable film 3 supported by the movable film support 4 The outer peripheral portion 3a is closer to the flexible liquid container 10 The movable film 3 on the side of the body 14 is preferable (see FIGS. 5 to 8).

In the check valve 1 shown in FIGS. 5 to 8, the movable film 3 having a shape that is curved in the radial direction in the initial state is used. When the internal pressure of the container is increased and the front end side is deformed, the compressive stress generated in one portion of the movable film 3 acts as a reaction force against the deformation, and exceeds the maximum value of the reaction force. Then, the stress acts as a force to deform the movable film 3 toward the distal end side, and the deformation is promoted. Further, the movable film 3 having a shape such as a curved cross section has a large surface area corresponding to the surface flaw and a large displacement amount (stroke) at the time of deformation. Therefore, the amount of deformation of the movable film 3 due to the change in the internal pressure can be increased, and the amount of suckback based on the deformation of the movable film 3 can be further increased to improve the suckback performance (see the movable film 3 shown in FIGS. 6 to 8). Action).

In the above, the check valve 1 (see FIG. 9) in which the meandering portion in the middle of the cross section of the movable film 3 is an acute angle, and the check valve 1 in the radial direction of the movable film 3 is opposite to the check valve 1 of FIG. Referring to Fig. 10), the check valve 1 (see Fig. 11) in which the cross-section is curved but the amount of unevenness is relatively small is the same, but the same is true in terms of improving the suckback performance. In the check valve 1 shown in FIG. 12, the movable film 3 in the initial state is in a substantially flat state, but has an annular convex portion that increases the surface area of the movable film 3 in the circumferential direction (may also be The recess) improves the suckback performance to a corresponding extent.

(Example of the shape of the movable film 3 which is stepwise deformed)

It is also preferred that the movable film 3 is deformed stepwise (moving after a plurality of times) when the internal pressure of the container fluctuates. According to the check valve 1, the movable film 3 is slightly deformed in a stepwise manner from the time when the top cover 13 is opened to the discharge of the liquid 20, and the liquid 20 is prevented from being ejected violently, so that it can be constructed and used. The flexible liquid container 10 is easier to use.

Such a check valve 1 can be configured, for example, by asymmetry of the radial length of the movable film 3 by shifting the center of the projecting body 2 from the center of the movable film 3 (refer to FIG. 14). The thickness of the movable film 3 is inclined in the radial direction (see FIG. 15), and the thickness of the movable film 3 is changed in the circumferential direction to be uneven in the circumferential direction (refer to the circle indicated by the arrow in the figure) Figure 16) of the change in thickness, etc.

An example of the operation when the internal pressure of the flexible liquid container 10 fluctuates will be described with reference to the check valve 1 shown in Fig. 14 (see Fig. 17).

In the check valve 1 in the initial state (see FIG. 17(A)), the slit 5 provided in the projecting body 2 is closed, and the movable film 3 is in a flat state (the same plane state). When the user holds the flexible liquid container 10 or presses it or the like to raise the internal pressure of the container or exerts a force on the liquid 20 in the discharge direction (below the drawing) by the gravity acting on the liquid 20, First, the side of the movable film 3 having a long radial length is deformed so as to bulge toward the distal end side, but the amount of deformation on the side having a short radial length is small (see FIG. 17(B)). Further, when the internal pressure rises or the like, the side of the movable film 3 having a short radial length is also deformed toward the distal end side, and the slit 5 provided in the projection 2 is opened, and the liquid 20 is discharged from the liquid through the opened slit 5. The portion 11 is discharged (see Fig. 17(C)). Thereafter, if the main factor of increasing the internal pressure of the container is removed or the gravity acting on the liquid 20 is released by reversing the relationship between the flexible liquid container 10 and the check valve 1 in the upper and lower directions, the pressure is released. Further, the internal pressure of the container becomes equal to or lower than that of the outside air, so that the slit 5 is closed to prevent air from entering the flexible liquid container 10 (see FIG. 17(D)). Further, the movable film 3 deformed in a bulging manner is deformed so as to return to the body 14 side of the flexible liquid container 10, and the liquid 20 stored in the liquid discharge portion 11 is instantaneously sucked into the tubular body (the tubular shape of the outflow port 12) In the portion 12e), the dripping phenomenon is suppressed (refer to Fig. 17 (E)).

(Example of the shape of the protrusion 2 which further improves the liquid tightness)

It is also preferable to further increase the structure in which the slit 5 in the closed state does not allow liquid to pass therethrough (liquid tightness). For example, by making the projection 2 of the check valve 1 into a shape in which the tip end is tapered, the liquid tightness of the slit 5 can be further improved (see FIG. 18).

Hereinafter, an example of the operation when the internal pressure of the flexible liquid container 10 fluctuates will be described with respect to the check valve 1 (see FIG. 19). First, in the check valve 1 in the initial state, the slit 5 provided in the projecting body 2 is closed, and the movable film 3 is in a flat state (the same plane state) (refer to the figure). 19(A)). When the user holds the flexible liquid container 10 or presses it or the like to raise the internal pressure of the container, or exerts a force on the liquid 20 in the discharge direction (below the drawing) by the gravity acting on the liquid 20, Then, the movable film 3 is deformed toward the distal end side, and the slit 5 provided in the projection 2 is opened, and the liquid 20 is discharged from the liquid discharge portion 11 through the opened slit 5 (see FIG. 19(B)). Thereafter, if the main factor of increasing the internal pressure of the container is removed or the gravity acting on the liquid 20 is released by reversing the relationship between the flexible liquid container 10 and the check valve 1 in the upper and lower directions, the pressure is released. Further, the internal pressure of the container becomes equal to or lower than that of the outside air, so that the slit 5 is closed to prevent the liquid 20 or air from intruding into the flexible liquid container 10. Further, the movable film 3 deformed in a bulging manner is deformed so as to return to the body 14 side of the flexible liquid container 10, and the liquid 20 stored in the liquid discharge portion 11 is instantaneously sucked into the tubular body (the tubular shape of the outflow port 12) In the portion 12e), the dripping phenomenon is suppressed (see Fig. 19(C)).

Heretofore, the example in which the check valve 1 of the present invention is applied to the flexible liquid container 10 has been described. However, the flexible liquid container 10 is only one example of a preferred application of the present invention. In the following, as another example of the flexible liquid container 10, a case where a laminated peeling container (also referred to as a layered container or the like) is applied (see FIGS. 20 to 22) will be described.

The laminated peeling container (indicated by symbol 10') is an example of a discharge container that mainly discharges a content liquid by squeezing a container, and includes an inner container (inner layer) containing the content liquid and a layered inner container. Outer container (outer layer). In a conventional laminated peeling container, the inner container is formed of a flexible material which is softly deformed as the content liquid is reduced, and the outer container is formed of an elastically deformable material, and the liquid is ejected from the external gas introduction hole. A corresponding amount of external air is introduced and introduced between the inner container and the inner container.

As shown in Fig. 20 and the like, the laminated peeling container 10' of the present embodiment includes a mechanism such as a container body 113 which includes a liquid 20 which is contained as an example of the contents and which is softened and deformed as the liquid 20 is reduced. a flexible inner container 111, and a container 112 having an inner container 111 and elastically deformable; a discharge cover 115 mounted to the mouth portion 113a of the container body 113, and forming a discharge port 114 for ejecting the liquid 20; And the upper cover 116, It is detachably attached to the discharge cover 115.

Here, the container body 113 is formed in a bottomed cylindrical shape, and the upper cover 116 is formed in a topped cylindrical shape to mount the upper cover 116 in the covered state of the discharge cover 115, and the central axes of the container body 113 and the upper cover 116. Configured on the same way as the common axis. Hereinafter, the common axis is referred to as a container axis O, and the side of the upper cover 116 in the direction of the container axis O is referred to as the upper side, and the bottom side of the container body 113 (not shown) is referred to as the lower side, and is also orthogonal to the container axis. The direction of O is called the radial direction, and the direction around which the container axis O is centered is referred to as the circumferential direction.

Further, the upper cover 116 may be connected to the discharge cover 115 by the hinge portion 116a (see FIG. 21 and the like). In order to prevent the upper cover 116 from being obstructed when the liquid 20 is ejected from the discharge port 114, the hinge portion 116a is disposed such that the laminating container 10' is inclined downward toward the discharge port 114 so as to be in a discharge posture. In the state, it is higher than the discharge port 114.

The container body 113 is a so-called layered bottle in which the inner container 111 is peelably laminated on the inner surface of the outer container 112. The container body 113 is formed, for example, by blow molding a co-extruded two-layer structure. The outer container 112 is made of, for example, a polyethylene resin or a polypropylene resin, and the inner container 111 is made of, for example, a polyamine-based synthetic resin or an ethylene-vinyl alcohol copolymer resin which is incompatible with the resin forming the outer container 112. .

The mouth portion 113a of the container body 113 is formed to include a tubular portion 117 located on the upper side and a tubular shape of the tubular portion 118 formed on the lower side and larger than the upper tubular portion 117 (refer to FIG. 21 and the like). A male screw portion 129 is formed on the outer peripheral surface of a portion (hereinafter referred to as an outer tubular portion) 117a formed by the outer container 112 in the upper tubular portion 117. Further, in the outer upper tubular portion 117a, an intake hole 119 for sucking outside air into the space with the inner container 111 is formed in a portion located below the male screw portion 129 (see FIG. 22 and the like). A communication groove 120 extending in the direction of the container axis O is formed in a portion of the male screw portion 129 located above the suction hole 119.

The inner peripheral surface of the outer upper tubular portion 117a is a cylindrical surface, and the inner peripheral surface layer has a portion (hereinafter referred to as an inner upper tubular portion) 117b composed of the inner container 111 in the upper tubular portion 117 (refer to FIG. 21). Wait). The upper end portion of the inner upper tubular portion 117b may be folded back toward the radially outer side and placed on the open end of the outer upper tubular portion 117a.

The discharge cap 115 includes a middle plug member 121 that closes the mouth portion 113a of the container body 113, and a top cylindrical tubular member 123 that covers the middle plug member 121 and is formed with a discharge port 114 (refer to FIG. 21 and the like). . The middle plug member 121 includes a plug body 147 whose outer peripheral edge portion is disposed on the open end of the mouth portion 113a of the container body 113, and a communicating tubular portion 122 that is erected from the plug body 147.

The plug body 147 includes: a bottomed cylindrical inner tubular portion 124 disposed in a gap between the mouth portion 113a of the container body 113 and the mouth portion 113a; and a flange portion 125 from the inner tubular portion The upper end of the protrusion 124 protrudes toward the radially outer side, and is disposed on the open end of the mouth portion 113a of the container body 113; the outer tube portion 126 extends upward from the outer periphery of the flange portion 125; and the intermediate tube portion 127 The inner tubular portion 124 is surrounded from the radially outer side so as to extend downward from the flange portion 125, and is liquid-tightly fitted into the mouth portion 113a of the container body 113 (see FIG. 21 and the like). The inner tubular portion 124, the flange portion 125, the outer tubular portion 126, and the intermediate tubular portion 127 are disposed coaxially with the container axis O. Further, an outer gas circulation hole 128 that penetrates in the radial direction and opens downward is formed at the lower end portion of the outer tubular portion 126.

The communication tubular portion 122 is disposed in a bottom wall portion of the inner tubular portion 124. Further, a through hole 142 through which both of the inside of the inner container 111 and the communicating tube portion 122 are opened is inserted through the bottom wall portion. The through hole 142 includes, for example, a plurality of small holes that are evenly arranged around the container axis O (see FIG. 21 and the like).

The main body tubular member 123 is formed in a top cylindrical shape disposed coaxially with the container axis O. A female screw portion 130 that is screwed and fixed to the male screw portion 129 of the mouth portion 113a of the container body 113 is formed on the inner circumferential surface of the peripheral wall portion 123a of the main body tubular member 123. Further, in the lower end portion of the peripheral wall portion 123a which is located below the threaded portion where the female screw portion 130 is formed, the lower tubular portion 118 of the mouth portion 113a of the container body 113 is fitted in an airtight state. The threaded portion is further located in the upper end portion of the upper side, and the outer tubular portion 126 of the middle plug member 121 is fitted.

A discharge port 114 for ejecting the liquid 20 is formed on the top surface portion 131 of the discharge cover 115. In the laminated peeling container 10' of the present embodiment, the discharge port 114 is formed to be coaxial with the container axis O (see FIG. 21 and the like), but may be formed at a position deviated from the container axis O.

Further, the top surface portion 131 of the discharge cover 115 is formed with an external air introduction projection 133 that protrudes upward, and an external air introduction hole 134 is formed in the external air introduction projection 133 (see FIG. 21 and the like). In order to prevent the liquid 20 from being sucked from the outside air introduction hole 134, the external air introduction projection 133 is formed in a state in which the liquid 20 is ejected from the ejection port 114 and the laminated peeling container 10' is tilted to a discharge posture. The position of the exit 114 (refer to FIG. 21 and the like).

For example, in the present embodiment, the external air introduction projection 133 is formed so as to stand between the discharge port 114 and the hinge portion 116a, and the external air introduction hole 134 is separated from the top surface portion 131 at a position higher than the top surface portion 131. Configure the distance in the open space. Therefore, even if it is assumed that the liquid 20 dropped from the discharge port 114 adheres to the outer surface of the discharge cover 115, the liquid 20 of the liquid drop is not easily sucked from the external gas introduction hole 134. Further, the external air introduction hole 134 is formed in such a manner that when the contents are ejected from the discharge port 114 and the laminated separation container 10' is tilted into the discharge posture, the upper air is opened to the upper opening, and it is more preferable The state in which the outer gas introduction projection 133 is opened vertically upward (see FIG. 21 and the like).

The specific shape of the external air introduction projection 133 is not particularly limited. For example, in the present embodiment, the length in the circumferential direction is longer than the radial direction of the discharge cover 115 (the direction perpendicular to the container axis O), and the The shape is curved by a circular arc centered on the discharge port 114. According to the outer air introducing projections 133 having such a shape, the liquid 20 adhering to the outer surface of the discharge cap 115 due to dripping or the like can be prevented from approaching the outer air introducing hole 134, thereby preventing the liquid 20 from being sucked from the outer air introducing hole 134. . It is also preferable that the external air introducing projection 133 is curved along an arc centered on the discharge port 114.

The ejecting cover 115 is formed with an engaging portion 132 that engages with the upper cover 116 when the cover is in the closed state. For example, in the present embodiment, a step portion slightly protruding in the radial direction is formed around the top surface portion 131 of the discharge cover 115, and the engaging portion for engaging the upper cover 116 when the cover is in the closed state is formed by the step portion. 132 (refer to FIG. 21 and the like).

Further, the top surface portion 131 is preferably formed smoothly. For example, in the laminated peeling container 10' of the present embodiment, a portion other than the portion where the discharge port 114 is formed and the portion where the external air introducing projection 133 is formed in the top surface portion 131 is a smooth surface. In this case, even if the liquid 20 such as a dripping liquid adheres to the top surface portion 131 of the discharge cap 115, it can be wiped off at a time, and it is easy to wipe off.

The upper plate portion 132 is formed with a receiving tubular portion 135 extending downward and having an outer diameter equal to the inner diameter of the outer tubular portion 140 to be described later. Further, a discharge cylinder 136 which is the discharge port 114 inside is formed in the upper plate portion 132.

Further, an inner sealing portion (sealing portion) 137 extending downward from the upper cover 116 is fitted into the discharge port 114 (see FIG. 20 and the like).

Here, between the middle pin member 121 and the body tubular member 123, an in-tube portion 140 that is externally fitted to the communicating tubular portion 122 of the middle pin member 121 is disposed. The outer tubular portion 140 is disposed coaxially with the container axis O. The lower end portion of the outer tubular portion 140 is externally fitted to the communicating tubular portion 122 and fitted into the inner tubular portion 124 of the middle plug member 121. The upper end portion of 140 is externally fitted to the receiving cylinder portion 135 of the body barrel member 123.

An annular air valve portion 141 (see FIGS. 21 and 22) that protrudes outward in the radial direction is formed in an intermediate portion of the outer tubular portion 140 in the direction of the container axis O. The air valve portion 141 is elastically deformable, and switches the communication of the suction hole 119 with the external air introduction hole 134 and the interruption thereof.

Further, the intermediate pin member 121 is formed with a communication recessed portion 143 that communicates between the discharge port 114 and the inner container 111. The communication recessed portion 143 is configured by the inside of the communication cylinder portion 122 and is disposed coaxially with the container axis O. Thereby, the container axis O direction coincides with the axial direction of the communication concave portion 143. Moreover, in the illustrated example, the communication recess 143 is located lower than the discharge port 114, that is, along the edge. The inside of the inner container 111 in the direction of the container axis O. Further, the internal volume of the communication concave portion 143 becomes larger than the internal volume of the discharge port 114.

A check valve 1 is disposed in the communicating tubular portion 122 of the middle plug member 121.

Next, the action of the laminated peeling container 10' configured as described above will be described.

As shown in FIG. 21, when the liquid 20 is ejected from the build-up peeling container 10', first, the upper cover 116 is removed from the discharge cover 115. Then, the laminated peeling container 10' is pressurized in a state in which the laminated peeling container 10' is tilted downward toward the horizontal surface, and the laminated peeling container 10' is pressurized so as to be pressed inward in the radial direction. Further, it is deformed by extrusion (elastic deformation), so that the inner container 111 is deformed together with the outer container 112 to reduce the volume.

Then, the pressure in the inner container 111 rises, and the liquid 20 in the inner container 111 passes through the through hole 142 to press the check valve 1. Further, the liquid 20 in the inner container 111 is ejected to the outside through the through hole 142, the communication recess 143, the inside of the outer tube portion 140, and the discharge port 114 (see Fig. 21).

Thereafter, if the pressing force of the liquid 20 in the inner container 111 against the check valve 1 is weakened by stopping or releasing the press-fitting of the laminated peeling container 10', the elasticity is restored by the laminated peeling container 10'. The pressure difference generated by the force returns the check valve 1 to the original shape in the direction of the container axis O (refer to Fig. 22).

As described above, according to the laminated peeling container 10' of the present embodiment, after the liquid 20 is discharged, the liquid 20 in the discharge port 114 can be introduced, and the air A can be sucked from the outside into the discharge port 114, thereby suppressing The liquid 20 that has not been returned to the inner container 111 remains in the discharge port 114. Thereby, it is possible to suppress the liquid 20 from leaking from the discharge port 114 after the liquid 20 is ejected.

[Example 1]

Next, embodiments of the invention will be described in detail.

(production of check valve 1)

Polyoxyxide A (manufactured by Dow Corning Toray, SH841U, density 1.14 g/cm ³ , rubber hardness 41 °) and polyoxyxide B (manufactured by Dow Corning Toray, SH861U, density 1.23 g/cm ³ , were used. The rubber hardness of 61 degrees) was mixed with 50% by weight of the polyfluorene raw material, and the polyoxyxene rubber raw material was put into a cavity formed by three molds by a transfer molding method, and then held at 175 ° C for 6 minutes to make the polyfluorene. The oxygen rubber raw material is hardened and integrally molded to form the check valve 1. Further, the check valve 1 has a hardness of 55 degrees and a density of 1.19 g/cm ³ .

The projection 2 of the check valve 1 includes a hemispherical front end portion (head portion) 2a and a side wall portion (tube) 2b having a length of 6.9 mm, an inner diameter of 4.0 mm, and a thickness of the front end portion 2a of the projection 2. The length of the slit 5 (the depth of the slit) was 0.5 mm.

The thickness of the movable film 3 is 0.15 mm, and the angle (obtuse angle) θ between the protrusion 2 and the movable film 3 is 110°.

(Example of use of check valve 1)

The check valve 1 manufactured as described above is assembled to the outflow port 12 (see FIG. 2) of the top cover 13 shown below. The outflow port 12 and the top cover 13 are obtained by using polyethylene as a material and by injection molding. The inner diameter of the outflow port 12 is 13.2 mm.

Then, the outlet port 12 to which the top cover of the check valve 1 is attached is attached to the container body 14 (see FIG. 1) shown below.

. Container body 14

The container body 14 comprises a laminate film of PET (polyethylene terephthalate) / ON (Oriented Nylon) / L-LDPE (Linear Low-Density Polyethylene). Here, PET is a biaxially stretched polyethylene terephthalate film having a thickness of 38 μm, ON is a biaxially stretched nylon-6 film having a thickness of 15 μm, and L-LDPE is a density of 0.9 μg/cm ^{3 having a} thickness of 95 μm, and ethylene. Linear polyethylene with a copolymer of 1-hexene. The joint portion 12d of the outflow port 12 and the container body 14 are joined by heat welding, and the package containing the check valve 1, the top cover 13, the outflow port 12 and the container body 14 is filled with a viscosity of 3 mL. The soy sauce 20' of s (23 ° C) was made into a 500 mL soy sauce container (Example 1).

In addition, for the comparison, the container described in Patent Document 1 was filled with 500 mL of the soy sauce (Comparative Example 1), and the check valve in the soy sauce container was changed to Japanese Patent Application No. 2008-534101. A one-way valve manufactured in the size ratio of Fig. 4 of the publication (Comparative Example 2).

After the soy sauce container of Example 1 and Comparative Examples 1 and 2 was opened, the soy sauce was discharged, and the container was slowly tilted from the erect state shown in FIG. 1 to the front end of the outlet so that the outlet was directed downward. The soy sauce was discharged by tilting it by 45° with respect to the horizontal direction, and returned to the original erect state after being discharged for 2 seconds. Immediately after returning to the erect state, the top cover was closed, and the test was repeated 40 times. After the above operation, it was left to stand for 1 hour for observation.

The evaluation is performed on the discharge amount of the liquid for each discharge operation, the number of times the top cover is opened before the liquid drop phenomenon (hereinafter referred to as the number of times of opening), and the air intrusion condition of the container body after the above-described one hour of storage. Comparison. Further, the poor suckback performance is a result of the fact that when the top cover is closed, the liquid remaining in the front end portion of the discharge port is squeezed from the front end of the discharge port by the sealing plug 13a, and the dripping phenomenon is liable to occur, and the number of times of opening is small.

In the container of Example 1, when the discharge of the sauce was stopped and the container was returned to the upright position (about 0.2 seconds), the soy sauce was sucked back, and no dripping occurred when the number of times of opening the plug was 40 times. Further, the discharge amount of the soy sauce in 2 seconds was about 10 mL, and the discharge amount was fixed even if the discharge amount was 40 times. Also, no air intrusion occurred after being placed for 1 hour.

In the container of Comparative Example 1, since the sucking performance was not provided, the dripping occurred from the first time. The discharge amount of soy sauce in 2 seconds was about 10 mL, and it was fixed even if it was performed 40 times. Also, no air intrusion occurred after being placed for 1 hour.

In the container of Comparative Example 2, the suckback was instantaneously generated, but the amount was small, and the number of times of opening was 3 times. Further, the amount of soy sauce discharged in 2 seconds was about 7 mL at the beginning of the experiment. However, when the number of discharges was increased, the amount of discharge was about 5 mL, and gradually decreased. Further, it was observed that air invaded after being left for 1 hour.

(effect)

The check valve 1 of the present invention does not become a resistance for liquid discharge when the liquid 20 is discharged from the flexible liquid container 10, and prevents air from intruding into the container from the outside of the container when the liquid 20 is stopped, and has a dripping phenomenon. The suppression effect is such that even if the discharge of the liquid 20 in the flexible liquid container 10 is stopped, no dripping is caused, and the flexible liquid container 10 and its surroundings are not contaminated.

[Industrial availability]

The check valve of the present invention can be widely applied to a flexible liquid container which can be filled with not only a food or a food, but also a built-in or filled product which is oxidized by contact with air, for example, Pharmaceuticals, medicines, etc. Further, as long as it is a liquid, physical properties such as viscosity are not particularly limited, and for example, it can also be applied to soy sauce, sweet wine, orange vinegar, soup, soup, wine, sauce, oil, olive oil, wine, and refreshing drink. In flexible liquid containers such as water, soup, mayonnaise, ketchup, sauce, mustard, hawthorn, jelly, miso, coffee, cream, lotion, dairy, etc.

1‧‧‧ check valve

2‧‧‧ spurs

3‧‧‧ movable membrane

3a‧‧‧ outside the movable membrane

4‧‧‧ movable membrane support

5‧‧‧Incision (opening and closing)

11‧‧‧Liquid discharge department

12‧‧‧Exit

12e‧‧‧ tubular part of the outlet (tubular body)

20‧‧‧Liquid

Claims (12)

A check valve provided in a liquid discharge portion of a flexible liquid container; characterized by comprising: a protrusion provided with an opening and closing portion for discharging liquid, and having elasticity; a movable film connected to the The protrusion is displaced according to a pressure change during the liquid discharge operation from the opening and closing unit; and the movable film support body displaces the movable film at a specific position of the liquid discharge portion of the flexible liquid container After the liquid is discharged, the liquid stored in the liquid discharge portion when the liquid is discharged from the flexible liquid container is introduced to the check valve side by the operation of returning the movable film to the initial state. The check valve of claim 1, wherein in the initial state, at least a part of the movable film is in a state of being recessed toward the body side of the flexible liquid container. The check valve of claim 2, wherein in the initial state, at least a portion of the movable film is located closer to a body side of the flexible container liquid container than a peripheral portion of the movable film supported by the movable film support. The check valve of claim 3, wherein in the initial state, the movable film is closer to the center and closer to the body side of the body side of the flexible container liquid container. The check valve of claim 1, wherein at least a portion of the movable film is curved in a radial direction. The check valve of claim 1, wherein the movable film is meandered in the middle. The check valve of claim 1, wherein the thickness of the movable film is less than the thickness of the head of the protruding body. The check valve of claim 1, wherein the thickness of the movable film is not uniform. The check valve of claim 8, wherein the thickness of the movable film is along a radial direction of the check valve And change. The check valve of claim 8, wherein the thickness of the movable film varies along a circumferential direction of the check valve. The check valve of any one of claims 1 to 10, wherein the center of the protrusion is offset from the center of the movable film. A check valve according to any one of claims 1 to 10, wherein the above-mentioned projecting body has a shape in which the front end is tapered.