JP5170148B2 - Tube container with check valve - Google Patents

Description

  The present invention relates to a tube container with a check valve that prevents backflow of contents and air after the contents are extruded, and more specifically, a check valve provided in the mouth of a tube container having resilience With a check valve that has a valve member that is attached to and detached from a valve seat provided at the mouth, and that is provided with a locking member that locks the valve member at the inner diameter step of the tube container to prevent the valve member from coming off. It relates to a tube container.

  Conventionally, tube containers that contain contents that change when exposed to air have excellent gas barrier properties, and after extruding the contents, keep the shape as it is (plastically deformed) to tube the outside air A metal made of aluminum, tin, lead or the like has been often used because it is not sucked into the container. However, the above metal tube container may not be used due to corrosion or the like depending on the properties of the contents. Further, from the viewpoint of disposal and cost after use, multilayer lamination such as olefin-based films gradually. It is replacing the use of plastic plastic tube containers.

  However, although this plastic tube container is excellent in terms of corrosion resistance, disposal and cost, plastic deformation after extrusion of the content is not so much made, and its restoring force makes it possible to achieve air back, There is a characteristic that air corresponding to the amount of the extruded content is drawn into the container. Such a characteristic of the plastic tube container is that, for example, in the case where the contents such as the hair dye are exposed to air and react to discolor, the commercial value is significantly impaired by discoloration or modification. There are concerns. Furthermore, depending on the type of plastic, the gas barrier property is low, and there is a concern that air permeates through the wall surface and enters the plastic tube container, touching the contents and causing discoloration.

For this reason, plastic tube containers are a laminate of polyolefins such as ethylene-vinyl acetate copolymer and polyamides with high gas barrier properties, and metal oxides such as alumina and silicon oxide are deposited on polyester and polyolefin. By using this film, gas barrier properties can be secured, and a separate check valve can be attached to the mouth to prevent air from being drawn by the restoring force after the contents are pushed out. To prevent the contents from changing.

JP 2000-289756 A

  As a prior art document of such a thing, the technique described in Patent Document 1 is shown in FIG. As shown in FIG. 7, this prior art includes a valve member a and a plug main body b that accommodates and integrally molds the valve member a. The plug main body b includes a valve member storage portion c and a valve member storage portion. a back flow prevention valve e having a short protrusion d on which the valve member a can be forcibly inserted and seated on the lower part of the c is attached to the mouth g of the plastic tube container f. This is a plastic tube container h with a valve for prevention. In this plastic tube container h with a backflow prevention valve, in the process of transition from the pressurized state to the reduced pressure state, the backflow prevention valve e is closed by the restoring force of the tube container f, and the contents and air discharged once. Is not called into the tube container f.

  In addition, the applicant of the present invention has a gas-barrier plastic tube, a gas-barrier sealing material that seals the mouth of the plastic tube, and the gas-barrier sealing material that is airtightly placed on the mouth. An application has already been filed for a plastic tube container with a check valve (Japanese Patent Application No. 2001-199669) comprising the check valve.

  However, although what is described in the above-mentioned patent document 1 does not need to divide the plug body b into two parts, after the valve member a is forcibly inserted into the plug body b, the backflow prevention valve e is not installed. Since it is necessary to attach to the mouth g of the plastic tube container f, the operation is troublesome. Further, the protrusion d is shortened so that the valve member a can be forcibly inserted into the plug body b. The valve member a may fall off.

  In addition, the applicant's prior application can cope with the variety of contents, such as corrosion resistance, is excellent in terms of disposal and cost, and the check valve is sensitive to changes in internal pressure during use. Correspondingly, it is excellent in that the valve opens and closes smoothly, but if the contents are quite viscous, there may be a gap due to the contents remaining on the mating surface of the check valve slit. This leaves room for further improvement.

  Therefore, the object of the present invention is to cope with the variety of contents, such as corrosion resistance, and is excellent in terms of disposal and cost, as well as good workability and content. An object of the present invention is to provide a highly reliable tube container with a check valve in which the valve is reliably opened and closed even if it has a high viscosity, and the discharged contents and air are not drawn into the container.

The present invention has been proposed in order to achieve the above object, and is characterized by having the following configuration.
That is, according to the present invention, a check valve for preventing the backflow of contents is provided in the mouth portion of the tube container having resilience, and the check valve is seated on a valve seat provided in the mouth portion. a valve member for opening and closing Te, a is engaged with the stepped counter-away seating surface side of the valve member having a locking member to fulfill detachment prevention of the valve member, the locking member, the It has a resilient leg that spreads outward on the extrusion end side of the mouth, and is formed with a bar in which a longitudinal guide rib is provided around the center of the shaft on the side of the seating surface of the valve member A tube container with a check valve is provided.

  Further, according to the present invention, there is provided the above-mentioned tube container with a check valve, wherein the tube container is formed of a laminate including at least one moisture-proof resin layer made of a plastic having gas barrier properties. The

Further, according to the present invention, the tube container has a layer configuration of an olefin resin outer layer / gas barrier resin layer / cyclic olefin copolymer layer / olefin resin inner layer from the outside to the inside. A tube container with a check valve is provided.

Moreover, according to this invention, the said tube container with a non-return valve whose contents of the said tube container are oxidizable substances, such as a hair dye, are provided.

The tube container with a check valve according to the present invention simply presses the check valve into the tube container, and even if the contents are filled from the bottom of the tube container, an air reservoir does not form in the container and the internal pressure is increased. When the check valve opens, the check valve opens and the contents are pushed out.The check valve locking member and the tube container lock prevent the check valve from coming off. Closed and cut off from outside to prevent contents and air from being drawn inside. Therefore, the workability is good, the valve opens and closes reliably even when the contents are highly viscous, and it is highly reliable because it does not draw in the discharged contents and air. That is, there is an effect that there is no harmful effect of air even in the manufacturing process.

  In addition, since the tube container with a check valve of the present invention is made of plastic, it can cope with the variety of contents, such as corrosion resistance, is excellent in terms of disposal and cost, and has a gas barrier. The effect by the property and moisture-proof resin layer can be expected.

  In addition, the tube container with a check valve of the present invention does not allow air (oxygen) to permeate the plastic tube even if the content is an easily oxidizable substance, and does not create an air pocket inside. The stop valve opens and closes with good responsiveness to changes in the internal pressure, and does not allow air to enter during use. Therefore, not only the manufacturing process but also the consumption of the end user, the easily oxidizable substance that is the contents in the filled state does not touch the air, and the discoloration or alteration of the easily oxidizable substance by the air can be avoided. Will not be adversely affected.

It is a longitudinal cross-sectional view of the tube container with a check valve which shows embodiment of this invention. FIG. 2 is a plan view of the check valve shown in FIG. 1. FIG. 2 is a side view of the check valve shown in FIG. 1. It is a reverse view of the check valve shown in FIG. It is a longitudinal cross-sectional view of the manufacture state of the tube container with a non-return valve which shows embodiment of this invention. It is a longitudinal cross-sectional view of the operation state of the tube container with a non-return valve which shows embodiment of this invention. It is a longitudinal cross-sectional view of a prior art example.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a longitudinal sectional view of a tube container with a check valve according to the present invention, FIG. 2 is a plan view of the check valve, FIG. 3 is a side view thereof, and FIG.
In the figure, a tube container 1a with a check valve includes a tube 2 having resilience and a check valve 5a for preventing a backflow of contents 4 provided in the mouth 3 of the tube 2, and further a mouth. 3 and the sealing material 6 for sealing, the cap 7 detachably attached to the mouth portion 3, a.

The tube 2 has a mouth 3 at one end, a bottom (not shown) for filling the contents 4 at the other end, and is made of a gas barrier material having resilience. If there is, there is no limitation in particular in the layer composition. Usually, a gas barrier layer, for example, a metal foil of aluminum or the like, a resin layer of ethylene-vinyl alcohol copolymer or the like is sandwiched with a thermoplastic resin, for example, a low density polyethylene (LDPE) of an olefin resin, and the gas barrier property is increased. The granted one is used.
In the above layer structure, it is preferable that at least one layer is composed of a moisture-proof resin layer, for example, a cyclic olefin copolymer layer.

In particular, when the content 4 is extremely disliked by oxygen, such as a hair dye, this tube 2 is composed of an olefin resin outer layer / gas (air to oxygen) barrier resin from the outside toward the inside. Those having a layer structure of layer / cyclic olefin copolymer layer / olefin resin inner layer are preferably used. At this time, the gas barrier resin layer and the cyclic olefin copolymer layer may be interchanged, and from the outside toward the inside, the olefin resin outer layer / cyclic olefin copolymer layer / gas (air to oxygen ) It may be a layer structure of barrier resin layer / olefin resin inner layer.
Further, an oxygen-absorbing resin layer may be included between the cyclic olefin copolymer layer and the gas barrier resin layer. These layers are thermally bonded when there is thermal adhesiveness between the respective layers, and when there is no such layer, an adhesive layer is provided between the respective layers and integrated.

  The olefin resin outer layer and inner layer are, for example, low / medium / high density polyethylene, linear low density polyethylene, isotactic polypropylene, syndiotactic polypropylene, ethylene-propylene copolymer, polybutene-1, poly 4-methyl-1-pentene, ethylene-butene-1 copolymer, propylene-butene-1 copolymer, ethylene-propylene-butene-1 copolymer, ethylene-vinyl acetate copolymer, ion-crosslinked olefin copolymer There are a combination (ionomer), an ethylene-acrylic acid ester copolymer, etc., and these may be used alone or in a blend of two or more.

  The cyclic olefin copolymer layer serves to prevent a decrease in the barrier property of oxygen in the air in the gas barrier resin layer due to moisture, and an amorphous or low crystalline copolymer of olefin and cyclic olefin. A polymer (COC) is mentioned. As the olefin, ethylene is preferable, but α having 3 to 20 carbon atoms such as propylene, 1-butene, 1-pentene, 1-hexene, 1-octene, 3-methyl 1-pentene, 1-decene, etc. -Olefin is used alone or in combination with ethylene. On the other hand, the cyclic olefin is an alicyclic hydrocarbon compound having an ethylenically unsaturated bond and a bicyclo ring, particularly, a hydrocarbon compound having a bicyclo [2,2,1] hept-2-ene skeleton.

  The gas (oxygen) barrier resin layer has a low gas (air or oxygen) permeability coefficient and hygroscopicity, and a thermoplastic resin is used. For example, the ethylene-vinyl alcohol copolymer described above is optimal, but not limited thereto, nylon 6, nylon 6/6, nylon 6/6/6 copolymer, metaxylylene adipamide Polyamides such as nylon 6,10, nylon 11, nylon 12 and nylon 13 are used.

For the oxygen-absorbing resin layer, a resin composition of an oxidizing resin and a transition metal catalyst or a resin composition of a thermoplastic resin and an oxygen absorbent is used. Here, the oxidizing resin is a resin that is oxidized by oxygen in the air by the action of the transition metal catalyst.
For example, (1) includes a carbon side chain (a), and the main chain is selected from the group consisting of a carboxylic acid group, a carboxylic acid anhydride group, a carboxylic acid ester group, a carboxylic acid amide group, and a carbonyl group in the side chain. Further, a resin containing at least one functional group (b), (2) a polyamide resin, (3) an ethylenically unsaturated group-containing polymer, and the like are used. The transition metal catalyst serves as a catalyst for the oxidation reaction of the oxidizing resin, and is an organic acid salt or organic complex salt of a transition metal.

  Examples thereof include iron, cobalt, nickel, copper, silver, tin, titanium, zirconium, vanadium, chromium, manganese, etc. Among them, cobalt is particularly preferable because of its high oxygen absorption rate. Further, as the oxygen absorbent, almost all conventional oxygen absorbents can be used, but those which are reducible and substantially insoluble in water are preferable, and reductive iron, reducible zinc, reductive tin powder, oxidized second The main component is a single or a combination of ferrous iron, tribasic iron oxide, iron carbide, silicon iron, iron carbonyl, iron hydroxide and the like. Further, a polymer compound having a polyhydric phenol in the skeleton, for example, a polyphenol-containing phenol-aldehyde resin can be used.

  The mouth portion 3 of the tube container 2 is engraved with a screw 20 on its outer peripheral surface, and a screw 21 along the screw 20 is engraved on the inner peripheral surface of the inner cylinder 22 of the cap 7 so that the mouth portion 3 is capped. 7 is screwed and can be screwed on. And as above-mentioned, since the gas-barrier sealing material 6 is affixed on the extrusion end 3a surface of the opening | mouth part 3, if the bottom part is closed after filling the content 4 from the bottom part, the whole inside of the tube 2 will be gas-barrier property. The air (oxygen) enters the inside and does not touch the contents 4.

  The cap 7 has a double cylinder shape of the inner cylinder 22 and the outer cylinder 23 described above, and the screw 21 is engraved on the inner peripheral surface of the inner cylinder 22, so that the cap 7 is the mouth 3 of the tube 2. It can be detachably screwed to the inner tube 22 to maintain the airtightness between the inner bottom surface of the inner cylinder 22 and the surface of the extrusion end 3a of the mouth portion 3 after the sealing material 6 is peeled off. The part 3 and the inner cylinder 22 are protected. In addition to the function of protecting the tube opening and the inner cylinder, the outer cylinder can ensure the ease of opening and closing by increasing the diameter of the cap. The material of the cap 7 is a thermoplastic resin, for example, low density polyethylene (LDPE) of an olefin resin, similar to the exterior material of the tube 2. It is desirable to have corrosion resistance, good workability, high economic efficiency, and gas barrier properties as much as possible.

  Examples of the material of the valve member are substantially the same as the outer layer and inner layer of the olefin resin of the tube 2, and are low / medium / high density polyethylene, linear low density polyethylene, isotactic polypropylene, syndiotactic polypropylene. , Ethylene-propylene copolymer, polybutene-1, poly-4-methyl-1-pentene, ethylene-butene-1 copolymer, propylene-butene-1 copolymer, ethylene-propylene-butene-1 copolymer, There are ethylene-acrylic acid ester copolymers and the like, and these may be used alone or in a blend of two or more. Further, an oxygen absorbing function may be added by blending an oxidizing resin and a transition metal catalyst into the above resin.

The tube container 1a with a check valve according to the present invention has a check valve 5a in which a locking member 14a that prevents the valve member 11 from coming off due to the engagement with the inner wall 2a of the tube 2 is provided on the anti-seating / seating seat surface 13 side. There is a feature in the point. As shown in FIG. 1, the locking member 14 a has four elastic legs 32 a spreading outward, and the four legs 32 a spreading outward contact the step 37. The valve member 11 is prevented from coming out of the valve member storage portion 30.

  On the other hand, a bar 39a is provided at the axial center of the valve member 11 on the side of the seating surface 12, and a guide rib 40 is provided in a cross shape with the bar 39a as the center. The bar 39a and the guide rib 40 provide a valve member. Thus, the 11 seating surfaces 12 are properly seated on the valve seat 10. As shown in FIG. 1, the bar 39 a is provided at the center of the valve member 11 on the side of the separation seating surface 12, but a bar may be formed at the center of the opposite leg. In this case, the length of the bar may be the length within the push-out end 3a when the valve member 11 is seated on the valve seat 10 or may be formed to be the same as the length of the discharge end when seated on the valve seat.

  Further, the content 4 to be filled in the tube 2 is not particularly limited, but is particularly suitable for those having a relatively high viscosity, and also pays much attention to gas barrier properties, so that it comes into contact with air. Those who dislike it are good and can demonstrate their effectiveness. Therefore, for example, a hair dye that changes color when it comes into contact with oxygen in the air is suitable. There are many types of hair dyes that mix two liquids to develop color.

Next, the function of the tube container 1a with a check valve having the above configuration will be described.
First, the contents 4, for example, a plastic tube 2, a gas barrier sealing material 6 and a check valve 5a made of a material that can appropriately correspond to the properties of the hair dye are appropriately selected.
In the case of the check valve 5a, it is pushed into the mouth part 3 of the tube 2 from the bar 39a side and pushed until the separation seating surface 12 of the valve member 11 is seated on the valve seat 10, and then the end face 3a of the mouth part 3 A gas barrier sealing material 6 is attached to and sealed.

  Next, when an open bottom portion of the tube 2 is turned up and an inert gas, for example, carbon dioxide gas having a specific gravity about 1.5 times that of air is introduced from the bottom portion, the valve member 11 of the check valve 5a is attached and detached. Since the surface 12 is separated from the valve seat 10, carbon dioxide gas enters the entire inside of the mouth portion 3, and air (oxygen) can be completely replaced from the inside of the tube 2 (see FIG. 5). Then, the hair dye which is the contents 4 is filled into the tube 2 from the bottom so that air does not enter, and the bottom is sealed. Therefore, the hair dye is completely surrounded by the plastic tube 2 having a high gas barrier property and the gas barrier seal material 6 with no room for air to enter. Next, a cap 7 having a material and a shape that can appropriately correspond to the properties of the hair dye is selected, and the cap 7 is screwed to the mouth 3 of the tube 2 containing the hair dye to protect the periphery of the mouth 3. The final product.

  In use, first, the cap 7 of the tube container 1a with a check valve is removed, and the sealing material 6 stuck to the mouth 3 of the tube 2 is exposed. While taking care to prevent the hair dye from jumping out of the tube 2, after peeling off the sealing material 6 from the mouth 3, if the tube 2 is pushed with a finger, the inside of the tube 2 becomes pressurized, and the hair dye. As a result, the valve member 11 of the check valve 5 a is pushed in the opening direction, the valve member 11 is separated from the valve seat 10, and the hair dye comes out from the extrusion end 3 a of the mouth portion 3.

  In the check valve 5a, the hair dye that has passed between the release seating surface 12 of the valve member 11 and the valve seat 10 hits the locking member 14a, and further promotes the movement of the valve member 11 in the opening direction. Four elastic legs 32a spreading outward from the member 14a are in contact with the aforementioned step 37 to restrict the valve member 11 from coming off (see FIG. 6). Note that the seating surface 12 of the valve member 11 is properly seated on the valve seat 10 by the bar 39 a and the guide rib 40 provided on the seating surface 12 side of the valve member 11.

  If the pressure of the finger is stopped after the required amount of hair dye is dispensed, the restoring force of the tube 2 causes the inside of the tube 2 to shift from the pressurized state to the depressurized state to move the valve member 11 in the closing direction. In the case of the member 11, when the contents are further filled, the hair dye hits the four legs 32a spreading outward from the resistance member 34 or the locking member 14a. In the case of the valve members 11a and 11b, the valve member 11a, 11b is not particularly promoted but is closed, and the hair dye and air do not enter the tube 2 after that. Then, the cap 7 is screwed. Therefore, according to the tube container 1a with a check valve, the hair dye as the filled content is not exposed to the air, not only when the content is filled but also when the final user consumes the hair. Discoloration or alteration of the agent can be avoided, and there is no adverse effect on the end user.

  Although the embodiment of the present invention has been described above, it should be understood that the specific configuration is not limited to this, and that changes and combinations can be made as appropriate without departing from the scope of the present invention.

  The tube container with a check valve of the present invention simply presses the check valve into the tube container, and even if the contents are filled from the bottom of the tube container, an air reservoir does not form in the container and the internal pressure is increased. When the check valve opens, the check valve opens and the contents are pushed out.The check valve locking member and the tube container lock prevent the check valve from coming off. Since it is closed and shut off from outside, the contents and air are not drawn into the inside, so the valve opens and closes reliably even if the contents are highly viscous, and since the discharged contents and air are not drawn in, it is reliable. In order to suppress the oxidation phenomenon caused by air in the consumption process, the industrial applicability is further increased by applying the contents to those which cause discoloration or alteration due to oxidation, such as hair dyes.

DESCRIPTION OF SYMBOLS 1a Tube container with check valve 2, b Tube 2a Inner wall 3, g Opening 3a Extrusion end 4 Contents 5a Check valve 6 Sealing material 7 Cap 10 Valve seat 11, a Valve member 12 Release seat surface 13 Counter release seat surface 14a Locking member 20, 21 Screw 22 Inner cylinder 23 Outer cylinder 30, c Valve member storage part 31 Shoulder part 32a Leg 37 Step 39a Bar 40 Guide rib b Plug body d Projection part e Backflow prevention valve f Plastic tube container h Backflow Plastic tube container with valve for prevention

Claims (4)

A check valve for preventing backflow of contents is provided in the mouth portion of the tube container having resilience, and the check valve has a valve member that opens and closes and opens and closes to a valve seat provided in the mouth portion. , it is one having a locking member which engages with the stepped counter-away seating surface side of the valve member serve a strain relief of the valve member, the locking member, the outer extrusion end side of the mouth portion A non-return check having a resilient leg extending in the direction and a bar having a longitudinal guide rib provided around the axial center of the valve member on the side of the seat Tube container with valve. The tube container is small without even check valve attached tube container according to claim 1, wherein comprising consist of laminate comprising a moisture-proof resin layer one layer made of a plastic having a gas barrier property. The tube container, towards the outside to the inside, the check according to claim 1 or 2, wherein forming a layer structure of an olefin resin outer layer / gas barrier resin layer / cyclic olefin copolymer layer / olefin resin inner layer Tube container with valve. The tube container with a check valve according to claim 2 or 3, wherein the content of the tube container is an easily oxidizable substance.

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