EP2597051A1 - Rückschlagventil, herstellungsverfahren davon und behälter mit rückschlagventil - Google Patents

Rückschlagventil, herstellungsverfahren davon und behälter mit rückschlagventil Download PDF

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Publication number
EP2597051A1
EP2597051A1 EP11809728.6A EP11809728A EP2597051A1 EP 2597051 A1 EP2597051 A1 EP 2597051A1 EP 11809728 A EP11809728 A EP 11809728A EP 2597051 A1 EP2597051 A1 EP 2597051A1
Authority
EP
European Patent Office
Prior art keywords
check valve
main body
lid
container
good
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP11809728.6A
Other languages
English (en)
French (fr)
Other versions
EP2597051A4 (de
Inventor
Denmi Kuwagaki
Michio Sugawa
Hitoshi Hagimoto
Taizo Minami
Takehisa Hashimoto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mikasa Industry Co Ltd
Kikkoman Corp
Asahi Kasei Pax Corp
Original Assignee
Mikasa Industry Co Ltd
Kikkoman Corp
Asahi Kasei Pax Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mikasa Industry Co Ltd, Kikkoman Corp, Asahi Kasei Pax Corp filed Critical Mikasa Industry Co Ltd
Publication of EP2597051A1 publication Critical patent/EP2597051A1/de
Publication of EP2597051A4 publication Critical patent/EP2597051A4/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D25/00—Details of other kinds or types of rigid or semi-rigid containers
    • B65D25/38—Devices for discharging contents
    • B65D25/40—Nozzles or spouts
    • B65D25/42—Integral or attached nozzles or spouts
    • B65D25/46—Hinged, foldable or pivoted nozzles or spouts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/52—Details
    • B65D75/58—Opening or contents-removing devices added or incorporated during package manufacture
    • B65D75/5861—Spouts
    • B65D75/5872—Non-integral spouts
    • B65D75/5883—Non-integral spouts connected to the package at the sealed junction of two package walls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D47/00—Closures with filling and discharging, or with discharging, devices
    • B65D47/04—Closures with discharging devices other than pumps
    • B65D47/06—Closures with discharging devices other than pumps with pouring spouts or tubes; with discharge nozzles or passages
    • B65D47/08—Closures with discharging devices other than pumps with pouring spouts or tubes; with discharge nozzles or passages having articulated or hinged closures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D47/00—Closures with filling and discharging, or with discharging, devices
    • B65D47/04—Closures with discharging devices other than pumps
    • B65D47/20—Closures with discharging devices other than pumps comprising hand-operated members for controlling discharge
    • B65D47/2018—Closures with discharging devices other than pumps comprising hand-operated members for controlling discharge comprising a valve or like element which is opened or closed by deformation of the container or closure

Definitions

  • the present invention relates to a check valve, a manufacturing method thereof and a container having a check valve.
  • vacuum containers are known as containers for inhibiting such oxidation of the content (see, for example, Patent Document 1).
  • a check valve for preventing air from entering the container is attached to a pouring spout.
  • the check valve has a structure having a slit formed in its domed head and the slit is configured to be opened when pressure is applied in the pouring direction of the content whereas it is closed when pressure is applied in the filling direction.
  • Patent Document 1 JP10-338239 A
  • the size of the pouring spout of the container is designed depending on the kind, viscosity, etc., of the content and the size of the check valve to be incorporated in the pouring spout is determined accordingly.
  • the outer diameter of the check valve is limited to around 10-15 mm. In order to mass-produce such small-size check valves at low cost, integral molding using a mold is suitable.
  • the present inventors made various types of check valves and containers having such valves as trial products by way of integral molding and evaluated the trial products with regard to the occurrence of air mixing into the container and the pouring of the content.
  • a lid 53 of a check valve 50 illustrated in Figs. 8A and 8B got stuck in a tubular main body 51 when a certain impact was applied to the container and the lid 53 did not sufficiently serve as a valve (see Comparative Example 1).
  • a hinge 55 shown in Figs. 8A and 8B is a portion connecting the main body 51 and the lid 53.
  • the invention has been made in order to solve the above-described problem and an object of the invention is to provide a check valve and a container having the same, whereby the mixing of air into the container can be sufficiently suppressed even if a certain impact is applied to the container and good pouring of the content can be stably maintained.
  • Another object of the invention is to provide a method for manufacturing a check valve having the above advantageous effects in a manner sufficiently efficient at low cost.
  • the check valve according to the invention is formed of rubber material and manufactured by integral molding.
  • the check valve comprises: a tubular main body having openings at opposite ends; a lid arranged to close one opening of the main body; and a hinge that connects the main body and the lid and is adapted to open the one opening when force is applied to the lid outwardly from the main body side, and the lid has a projection on a side surface thereof, the projection coming in contact with a peripheral edge of the one opening of the main body.
  • the above check valve has the projection formed on the side surface of the lid and when the one opening of the main body is closed, the projection comes in contact with the peripheral edge of the one opening of the main body. Since such projection is formed, the lid does not easily get stuck in the opening of the main body even if a certain impact is applied to the check valve and the lid can stably serve as a valve.
  • the projection formed on the side surface of the lid will be a so-called undercut portion in the molding process.
  • a molded body is manufactured through integral molding and if it includes an undercut portion, it cannot properly be taken out from the mold in the mold-releasing step because the undercut portion gets caught in the mold and the molded body could be broken in some cases.
  • increasing the number of molds so as to avoid undercut portions would cause another problem of raising cost.
  • the check valve according to the invention can sufficiently avoid such problem arising from undercut without the use of any special mold. That is, since the check valve according to the invention is formed of rubber material having a predetermined hardness and elongation, the projection of the lid can properly be taken out from the mold even if the projection is an undercut portion. Accordingly, the manufacturing cost of the check valve can sufficiently be reduced.
  • the hardness of silicone rubber indicated herein is a value measured in accordance with JIS K6249 and the elongation indicated herein is a value measured in accordance with JIS K7127.
  • the one opening of the main body be constituted by a linear portion which serves as the hinge and an arc-shaped portion.
  • arc used herein means part of a circle or part of an ellipse.
  • the outer diameter R 1 of an arc-shaped portion of the lid be greater than the diameter R 2 of the arc-shaped portion of the opening and that the difference between R 1 and R 2 be from 0.06 mm to 0.50 mm.
  • the side surface of the lid and the inner surface of the main body form an angle of 15-25 degrees.
  • the rubber material have a hardness of 30-80 degrees and an elongation of 200-900%, since such rubber material allows check valves with sufficient mechanical strength to be obtained easily without causing problems due to undercut during the manufacturing process.
  • the container according to the invention comprises a container main body formed of a film and the above-described check valve attached to the container main body. Since the container has the above-described check valve, the mixing of air into the container can sufficiently be suppressed even if a certain impact is applied to the container. Consequently, deterioration of the content due to oxidation can sufficiently be suppressed. In addition, since good pouring of the content can be stably maintained by the effect of the above-described check valve, the container can be used for a substantially long period of time without any special handling by a user.
  • the container according to the invention further comprise a spout in which the check valve is mounted.
  • a liquid outlet at the tip of the spout be shaped to be narrowed in the middle and again broadened.
  • At least part of the main body of the check valve be formed to be thin enough to be able to deform according to a difference from atmospheric pressure when the check valve has a negative pressure inside and thereby allow the check valve to have a reduced volume.
  • the main body of the check valve have a stepped form composed of a small diameter part and a large diameter part and that the one opening be formed at the small diameter part.
  • the small diameter part be formed to be thinner than the large diameter part.
  • the invention provides a method for manufacturing the above-described check valve. That is, the invention provides a method for manufacturing a check valve which comprises: a tubular main body having openings at opposite ends; a lid arranged to close one opening of the main body; and a hinge that connects the main body and the lid and is adapted to open the one opening when force is applied to the lid outwardly from the main body side, the lid having a projection on a side surface thereof, the projection coming in contact with a peripheral edge of the one opening of the main body.
  • the method comprises: a molding step of obtaining a molded body of rubber material having a hardness of 30-80 degrees and an elongation of 200-900% in a cavity having a concave portion to form the projection; a mold-releasing step of removing the molded body from the cavity; and a cutting step of separating the main body and the lid from each other except a portion serving as the hinge.
  • the portion to be formed into the projection of the lid can sufficiently be prevented from getting caught in the concave portion of the cavity and the molded body can smoothly be taken out of the mold. As a result, no special mold is needed and this attains sufficiently reduced manufacturing costs.
  • the mixing of air into the container can be sufficiently suppressed even if a certain impact is applied to the container and good pouring of the content can be stably maintained. Further, by adopting the manufacturing method of a check valve according to the invention, a check valve having the above advantageous effects can be manufactured sufficiently efficiently at low cost.
  • a check valve 10 is made of elastomer, such as rubber material, and manufactured, for example, by integral molding.
  • the check valve 10 has: a tubular main body 1 having openings 1 a and 1 b at opposite ends thereof; a lid 3 arranged to close the opening 1 a at the tip of the main body 1; and a hinge 5 that connects the main body 1 and the lid 3.
  • the hinge 5 functions as a hinge for the lid 3 and has flexibility to allow the opening 1 a of the main body 1 to be open when force F is applied to the lid 3 outwardly from the main body 1 side.
  • the main body 1 has a through hole 1 c longitudinally extending therethrough and the openings 1 a and 1 b are the opposite ends of the through hole 1 c.
  • the through hole 1 c preferably has an inner diameter of about 5.0-7.0 mm.
  • the lower part of the main body 1 has a thick wall and the upper part has a thin wall.
  • the outer diameters of the lower part (thick-wall portion) and the upper part (thin-wall portion) of the main body 1 are preferably about 12.8 mm and about 7.7-10.0 mm, respectively.
  • the outer surface of the lower part of the main body 1 is partly formed as a planar surface 1 d and a projection 1 e is provided on the planar surface 1 d.
  • the projection 1 e serves as a positioning mark used when fixing the check valve 10 to an outer body 32 (see Figs. 6A and 6B ).
  • the opening 1 a at the tip of the main body 1 is constituted by a linear portion L and an arc-shaped portion R, as shown in Fig. 1 .
  • the linear portion L of the opening 1 a is formed by a raised part 1f which is provided inside the through hole 1 c of the main body 1 in the vicinity of the opening 1 a.
  • the hinge 5 is formed by making the linear portion L and a linear portion of the lid 3 as a continuous portion. Configuring the portion other than the portion constituting the hinge 5 in an arc shape can simplify the manufacturing process and is thus advantageous. That is, after integral molding, the lid 3 can be cut out of the main body 1 except the hinge 5 by a simple step of increasing the pressure inside the main body 1.
  • the lid 3 is connected to the main body 1 via the hinge 5 and arranged to close the opening 1 a of the main body 1.
  • the lid 3 has a projection 3a on the side surface 3b thereof, the projection 3a coming in contact with the peripheral edge of the opening 1 a of the main body 1. With this projection 3a on the side surface 3b of the lid 3, the lid 3 does not easily get stuck in the through hole 1c of the main body 1 even if a certain impact is applied to the check valve 10 and the lid 3 can stably function as a valve.
  • the projection 3a is preferably provided at the tip end.
  • the projection 3a preferably has a height (length from the side surface 3b of the lid 3 to the tip of the projection 3a) of 0.4-0.6 mm and more preferably 0.45-0.55 mm.
  • a height length from the side surface 3b of the lid 3 to the tip of the projection 3a
  • more preferably 0.45-0.55 mm are preferably 0.35 mm.
  • the height of the projection 3a is less than 0.35 mm, the effect of preventing the lid 3 from getting stuck in the through hole 1 c cannot be sufficiently obtained.
  • the height exceeds 1.0 mm, problems due to undercut easily occur in the manufacturing process.
  • the outer diameter R 1 of an arc-shaped portion of the lid 3 be greater than the diameter R 2 of the arc-shaped portion R of the opening 1a.
  • the difference between R 1 and R 2 is preferably 0.06-0.50 mm and more preferably 0.08-0.25 mm.
  • the lid and the main body are not likely to be in a quasi-adhesion state, and, consequently, pouring is not obstructed. If the outer diameter of the lid is not uniform, for example, if the side surface of the lid 3 is tapered as shown in Fig. 2B , R 1 is regarded as representing the maximum outer diameter.
  • the side surface 3b of the lid 3 is preferably tapered such that the outer diameter decreases toward the main body 1 side from the top.
  • the angle formed by the side surface 3b of the lid 3 and the inner surface of the main body 1 is preferably 15-25 degrees. When the angle is greater than 15 degrees, the lid does not easily get stuck in the through hole of the main body and pouring is, consequently, not obstructed. When the angle is smaller than 25 degrees, functioning as a check valve can be further facilitated and the mixing of air does not easily occur.
  • asperities on one or both of the contact portions of the main body 1 and the lid 3 of the check valve 10 is preferable. Such asperities can reduce the surface tension, resulting in preventing the main body 1 and the lid 3 from adhering to each other due to the surface tension of the content liquid and thereby allowing the valve to be easily opened.
  • Examples of the way to provide asperities include adding a filler to the rubber material, more specifically, using a rubber material mixed with a filler for one or both of the main body 1 and the lid 3 of the check valve 10.
  • filler examples include pyrogenic silica fine powder, titanium oxide powder, alumina powder, ground quartz, ground cristobalite, diatomite powder, aluminosilicate powder, magnesium oxide powder, aluminium hydroxide powder, iron oxide powder, zinc oxide powder and heavy calcium carbonate powder.
  • the content of the filler in the rubber material is preferably 1-50% by weight and more preferably 5-40% by weight.
  • the average particle diameter of the filler is preferably 0.1-50 ⁇ m and more preferably 5-40 ⁇ m.
  • the check valve 10 is made of rubber material and manufactured through integral molding. Specific examples of the rubber material include silicone rubber and NBR. If the check valve is used for a food container, it is preferable to use silicone rubber for the rubber material.
  • the rubber material that constitutes the check valve 10 has a hardness of 30-80 degrees, preferably 40-70 degrees, and more preferably 50-60 degrees.
  • the rubber material has an elongation of 200-900%, preferably 300-800%, and more preferably 400-700%. If the rubber material has a hardness of less than 30 degrees or an elongation of greater than 900%, the check valve 10 would not have sufficient mechanical strength. On the other hand, if the rubber material has a hardness of greater than 80 degrees or an elongation of less than 200%, problems due to undercut would occur in the manufacturing process.
  • the method for manufacturing the check valve 10 includes (a) molding step, (b) cutting step and (c) cutting step.
  • the molding step is to obtain a molded body of a rubber material having a hardness of 30-80 degrees and an elongation of 200-900% in a cavity having a concave portion to form the projection 3a.
  • the process conditions are set so that the resulting molded body has a hardness and elongation within the above range.
  • the mold-releasing step is to remove the molded body from the cavity.
  • the molded body is removed from the cavity, for example, by pulling the male and female molds in opposite directions along the longitudinal direction of the molded body.
  • the portion to be formed into the projection 3a of the check valve 10 is an undercut portion; however, since the rubber material that constitutes the molded body has a hardness and elongation within the above-described range, problems arising from the undercut portion can be sufficiently suppressed.
  • the cutting step is to cut the main body 1 and the lid 3 from each other, except the portion serving as the hinge 5. Since the opening 1 a of the main body 1 is constituted by the linear portion L and the arc-shaped portion R, when air is supplied into the molded body to increase the pressure inside the molded body, stress is concentrated to the arc-shaped portion R, which allows only the arc-shaped portion R to be cut out.
  • a self-standing readily-transportable flexible vacuum container 30 having an outer body 32 in which a check valve 10 is incorporated.
  • the container 30 comprises a container main body 31 formed of a transparent film having flexibility, an outer body 32 disposed diagonally at a shoulder of the container main body 31 and a check valve 10 incorporated in the outer body 32.
  • the check valve 10 is incorporated in an orientation such that the lid 3 is located at the tip of the outer body 32 and that the hinge 5 extends horizontally and the projection 3a is located below the hinge 5 when the container 30 stands with its bottom down (the state shown in Fig. 5 ).
  • the film constituting the container main body 31 may be a single layer film, a multilayer film is preferable.
  • the film is constituted by, for example, a base layer that serves as an outer layer when formed into a bag-like shape, a sealant layer that serves as an inner layer and an adhesive layer that bonds the base layer and the sealant layer to each other.
  • the outer body 32 is composed of a cap attachment part 32a, a check valve fixing part 32b provided below the cap attachment part 32a and a joint 32c provided further below the check valve fixing part 32b. Note that no cap is shown in Fig. 5 .
  • the outer body 32 is attached to the container main body 31 by bonding the outer surface of the joint 32c and the peripheral edge of the container main body 31 so that the cap attachment part 32a and the check valve fixing part 32b protrude out from the container main body 31.
  • the outer body 32 may be one prepared by injection molding, etc. Examples of the material of the outer body 32 include synthetic resin such as polyethylene and polypropylene. Welding between the container main body 31 and the joint 32c may be carried out by heat sealing, high-frequency sealing, hot air sealing, microwave heating, ultrasonic sealing and the like.
  • the container 30 Since the container 30 has the check valve 10, the mixing of air into the container 30 can sufficiently be suppressed even if a certain impact is applied to the container 30. As a result, deterioration of soy sauce due to oxidation can be sufficiently suppressed. Further, good pouring of the content can stably be maintained due to the effect of the check valve 10 and the container 30 can thus be used for a considerably long period of time without any special handling of a user.
  • the invention is not limited to the above-described embodiment.
  • the projection 3a is formed on part of the side surface 3b of the lid 3 in the above-described embodiment
  • a configuration shown in Fig. 7 is possible in which the entire side surface 13b of a lid 13 is tapered and the upper part thereof serves as a projection 13a.
  • the projection 13a is an undercut portion; however, similarly to the above-described embodiment, problems due to the undercut portion can be sufficiently prevented by using a rubber material having a hardness and an elongation within the above-described range.
  • the shape of the main body of the check valve is not limited to a cylindrical shape and the main body may have a tubular shape with an ellipse, rectangular or polygonal cross-section. Still further, the cross-section of the flow path of the through hole 1 c and the shape of the lid are not limited to an approximately circular shape and may be ellipse, rectangular or polygonal.
  • Containers provided with the check valve of the invention may be filled with other liquids, such as soft drinks, alcohol beverages, salad oil or liquid detergent.
  • a container 30 having a suck-back mechanism will be described below (see Figs. 9-12 ).
  • a liquid outlet 32d formed at the tip of an outer body (hereinafter also referred to as a spout) 32 has a shape good for preventing liquid, such as soy sauce, from dripping when it is stopped pouring.
  • the liquid outlet 32d is shaped to be narrowed in the middle and again broadened (see Fig. 9 ).
  • the container 30 according to the present embodiment is equipped with a suck-back mechanism.
  • the main body 1 of the check valve 10 is formed to be thin enough to be able to deform according to the difference from atmospheric pressure when a negative pressure is created inside the check valve 10 and thereby allow the check valve 10 to have a reduced volume (see Fig. 10 , etc.).
  • which portion is formed to be thin is not particularly limited; however, the check valve 10 used in the present embodiment is configured such that the main body 1 has a stepped form composed of a small diameter part 11 and a large diameter part 12 and the small diameter part 11 is formed of a thinner wall than that of the large diameter part 12 so as to have flexibility (see Fig. 11 , etc.).
  • the operation of the suck-back mechanism in the above-described container 30 is as follows. First, when the container 30 is returned from the inclined discharging position to the upright (upstanding) position, the discharging of the soy sauce stops. Further, when the container is returned to the upright position, the lid 3 of the check valve 10 is by itself closed due to the elasticity of elastomer and the space from the lid 3 of the check valve 10 to the liquid outlet 32d (represented by A in Fig. 9 ) and the space from the lid 3 of the check valve 10 toward the interior of the container 30 (represented by B in Fig. 9 ) are separated from each other within the spout 32.
  • the soy sauce which is going back to the lower part of the container creates negative pressure in the upper part of the container 30 (represented by P in Fig. 1 ).
  • the main body 1 of the check valve 10 partly (in the present embodiment, the wall of the small diameter part 11) deforms to be dented according to the difference from atmospheric pressure (see Fig. 11 ).
  • the time taken for a user to attach a cap after the user has returned the container 30 from the discharging position to the upright position is expected to be 1-2 seconds if all goes smoothly, but this is enough time to suck back the soy sauce left at the liquid outlet 32d in the container 30 according to the present embodiment.
  • molded bodies were prepared in the following manner. That is, silicone rubber material was charged into a cavity constituted by two molds and subsequently cured within the cavity at 175°C for six minutes, thereby obtaining a molded body. When the obtained molded body was removed out and its projection was observed under a microscope, no breakage was found. In each of Examples 1-3, the silicone rubber constituting the molded body had a hardness of 55 degrees and an elongation of 380%.
  • molded bodies were prepared in the following manner. That is, silicone rubber material was charged into a cavity constituted by nine molds and subsequently cured within the cavity at 170°C for 135 seconds, thereby obtaining a molded body. When the obtained molded body was removed out and its projection was observed under a microscope, no breakage was found. In each of Examples 4 and 5, the silicone rubber constituting the molded body had a hardness of 60 degrees and an elongation of 350%.
  • Check valves of Examples 1-5 and Comparative Example 1 were prepared by increasing the pressure inside the obtained molded bodies to cut out the portion other than the linear portion serving as a hinge in an arc-like form.
  • the angle ⁇ between the side surface of the lid and the inner surface of the main body was set to 20 degrees.
  • Containers having the configuration illustrated in Fig. 7 were prepared by mounting the check valves of Examples 1-5 and Comparative Example 1 each into an outer body and welding the outer body and the container main body to each other.
  • a multilayer film of PET/ON/L-LDPE was used for a flexible film that constitutes the container main body.
  • the containers according to Examples 1-5 and Comparative Example 1 were each filled with 500 ml of soy sauce to prepare test samples and each sample was subjected to the following drop test. After dropping each sample freely from the respective heights shown in Tables 1 and 2, the occurrence of the mixing of air into the container (air mixing) and the pouring of the soy sauce were evaluated. The occurrence of the mixing of air was determined visually and whether the pouring of the soy sauce was good or not was determined according to whether the soy sauce came out smoothly when the container was 45 degrees inclined. The results are shown in Tables 1 and 2.
  • Example 1 Example 2
  • Example 3 Check Valve Dimensions Outer Diameter of Lid (R 1 ) mm 6.41 4.42 4.49 Inner Diameter of Main Body (R 2 ) 6.30 4.31 4.30 Difference (R 1 -R 2 ) 0.11 0/11 0.19 Drop Test Height of Drop Unit Air Mixing Pouring Air Mixing Pouring Air Mixing Pouring 10 cm No Good No Good No Good 20 No Good No Good No Good 40 No Good No Good No Good 60 No Good No Good No Good 80 No Good No Good No Good 100 No Good No Good No Good 120 No Good No Good No Good 140 No Good Yes Not Good No Good 160 Yes Not Good No Good 180 No Good 200 Yes Not Good Note Tow-Mold Type
  • Example 4 Comparative Example 1 Check Valve Dimensions Outer Diameter of Lid(R1) mm 6.35 6.37 6.30 Inner Diameter of Main Body (R2) 6.29 6.29 6.30 Difference (R1-R2) 0.06 0.08 0.00 Drop Test Height of Drop Unit Air Mixing Pouring Air Mixing Pouring Air Mixing Pouring 10 cm No Good No Good Yes Not Good 20 Yes Not Good No Good 40 Yes Not Good 60 80 100 120 140 160 180 200 Note Nine-Mold Type One-Mold Type
  • Example 1 Next, several containers according to Example 1 were prepared and each filled with 500 ml of soy sauce to prepare test samples. The following test was performed for each sample to evaluate the performance of the check valve in more detail.
  • Drop Test I The containers containing soy sauce therein were dropped under the respective conditions of (i) and (ii) below. By changing the height from which the container was dropped, the occurrence of the mixing of air into the container and the pouring of the soy sauce were observed after each drop. The evaluation criteria for the occurrence of air mixing and the pouring of the soy sauce were as described above. Five samples were tested under the respective conditions.
  • the container was freely dropped five times or ten times from a fixed height of drop of 120 cm, with the bottom of the container main body down.
  • the results are shown in Table 6. Two samples were tested under the respective conditions.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
  • Bag Frames (AREA)
  • Check Valves (AREA)
EP11809728.6A 2010-07-23 2011-07-22 Rückschlagventil, herstellungsverfahren davon und behälter mit rückschlagventil Withdrawn EP2597051A4 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2010165562 2010-07-23
PCT/JP2011/066678 WO2012011558A1 (ja) 2010-07-23 2011-07-22 逆止弁及びその製造方法、並びに、逆止弁を備える容器

Publications (2)

Publication Number Publication Date
EP2597051A1 true EP2597051A1 (de) 2013-05-29
EP2597051A4 EP2597051A4 (de) 2015-04-22

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EP11809728.6A Withdrawn EP2597051A4 (de) 2010-07-23 2011-07-22 Rückschlagventil, herstellungsverfahren davon und behälter mit rückschlagventil

Country Status (5)

Country Link
US (1) US20130119092A1 (de)
EP (1) EP2597051A4 (de)
JP (2) JPWO2012011558A1 (de)
CN (1) CN103052569A (de)
WO (1) WO2012011558A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL2010938C2 (en) * 2013-06-07 2014-12-09 Ipn Ip Bv A collapsible pouch provided with a closure assembly.
WO2014196859A1 (en) * 2013-06-07 2014-12-11 Ipn Ip B.V. A collapsible pouch provided with a closure assembly
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WO2014196859A1 (en) * 2013-06-07 2014-12-11 Ipn Ip B.V. A collapsible pouch provided with a closure assembly
US10005602B2 (en) 2013-06-07 2018-06-26 Scholle Ipn Ip Bv Collapsible pouch provided with a closure assembly
EP3280650A4 (de) * 2015-04-09 2018-11-14 Mark Steele Verschlusssystem und verfahren für packungsventil

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US20130119092A1 (en) 2013-05-16
EP2597051A4 (de) 2015-04-22
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JP2012106800A (ja) 2012-06-07
WO2012011558A1 (ja) 2012-01-26
CN103052569A (zh) 2013-04-17

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