JP6241799B2 - Non-return type pouring nozzle - Google Patents

Description

  The present invention relates to a non-return type pouring nozzle made of a laminated film, and more particularly to a film-like non-return type pouring nozzle capable of appropriately controlling the discharge (pouring) of a liquid filler.

  Examples of the film-like non-return type dispensing nozzle include those disclosed in Patent Documents 1 and 2. This non-return-type pouring nozzle in the form of a film, when dispensing a liquid filling material filled in a packaging bag, air (outside air) corresponding to the volume of the pouring amount enters the packaging bag instead It has a function to prevent it. That is, due to the shrinkage or crushing deformation of the packaging bag body itself, the liquid filling (hereinafter simply referred to as “liquid material”) is stopped, and at the same time, the dispensing passage in the dispensing nozzle is automatically opened by wetting with the liquid material. It is characterized by a non-return function (self-seal function) that is sealed and prevents outside air from entering the packaging bag. That is, a packaging body in which a liquid material is filled and packaged in a packaging bag having such a film-type non-return type pouring nozzle is dispensed before, during and after the liquid material is poured out. In any case after the delivery, there is a feature that the outside air can be prevented from entering the packaging bag body.

  The packaging bag provided with a film-like non-return type pouring nozzle has the film-like non-return type pouring nozzle protruding in a horizontal direction from the side of the upper portion of the main body of the packaging bag. By tilting the tip of the non-return type dispensing nozzle downward, the liquid material in the bag can be poured out from the tip of the dispensing nozzle. When stopping the dispensing of the liquid material, the packaging bag is returned from the tilted posture to the normal standing posture. At that time, the dispensing passage of the non-return type dispensing nozzle has liquid inner surfaces. The above non-return function (self-seal function) can be effectively exhibited by automatically sealing each other by being wetted by the packaged items.

  However, when this packaging bag is returned to the standing posture, the liquid material in the vicinity of the tip opening of the film-like non-return type pouring nozzle flows back into the packaging bag body through the pouring passage, and from the tip opening. It is divided into what is pushed out, but the liquid material pushed out from the opening of the tip does not run out (drop) sufficiently, but remains attached to the tip opening and flows down, or falls off the lower end of the opening. In some cases, the packaging bag and its surroundings may be soiled.

  Therefore, in order to solve the above problems, the inventors attached a film-like non-return type pouring nozzle projecting obliquely upward from the upper end of the packaging bag body in Patent Document 3, and attaching the pouring nozzle to the base end. It has been proposed to be constituted by an inclined part on the part side and a horizontal part on the tear opening side.

  According to this packaging bag, when pouring out the liquid material, it is necessary to tilt the conventional pouring nozzle more greatly than the type of packaging bag that protrudes (in the horizontal direction) on the side of the packaging bag body. As a result, in the newly proposed one, the force in the direction along the opening of the liquid material poured out from the opening at the tip of the dispensing nozzle (the force that falls down) is reduced, and at the same time, The negative pressure of drawing out the packaged material into the package acts more greatly. Therefore, the liquid drainage is improved during the pouring of the liquid material and when the packaging bag is raised and returned to stop the liquid material pouring. Can be effectively removed. Moreover, since the liquid material flows into the inclined portion of the film-type non-return type dispensing nozzle at once, it is rectified by the narrow horizontal portion and heads toward the tip opening, so that the liquid material is accurate in the intended direction. The effect that it can discharge well arises.

JP 2005-15029 A JP-A-2005-59958 Japanese Patent No. 5975452

  However, in the above packaging bag, since the film-like non-return type dispensing nozzle is projected obliquely upward from the upper edge of the packaging bag body, it is necessary to tilt the packaging bag more than before when the liquid material is poured out. There is. For this reason, the discharge pressure (flow velocity of the discharge flow) of the liquid material flowing into the discharge passage of the film-like non-return type discharge nozzle becomes large and the discharge flow is not stable, and the discharge amount can be controlled appropriately. There were cases where it was not possible.

  Moreover, in the conventional film-like non-return type dispensing nozzle, in order to reduce the amount of dispensing, the opening is narrowed by tapering toward the tip, but this makes the stiffness of the laminated film at the tip opening portion stronger. The tip opening is easily closed by a self-sealing function. For this reason, when the dispensing of the liquid material is stopped, the liquid material in the vicinity of the tip opening is closed and pushed out before it completely returns to the inside of the nozzle, and the liquid material adheres around the tip opening and dripping. May occur.

  Accordingly, an object of the present invention relates to a film-like non-return type pouring nozzle that projects obliquely upward from the upper end edge of such a packaging bag body, while being able to appropriately control the discharge amount and to apply a small amount of liquid material. The object is to propose a novel nozzle dispensing passage structure that can dispense a fixed amount at a time and can effectively suppress the occurrence of dripping.

In the research for realizing the above object, the inventor protruded obliquely upward from the upper edge of the liquid-filled packaging bag body made of a laminated film, and the central portion communicates with the packaging bag body. A non-return type dispensing nozzle provided with a dispensing passage that
A truncated cone-shaped inclined portion that protrudes obliquely upward from the upper end edge of the packaging bag body and forms a proximal end side, and a ladder that is connected to the extended position of the inclined portion and is parallel to the upper edge of the packaging bag body in shall be constituted by a horizontal portion of the shape, of the pouring passage, the following (i), any position of (ii), i.e.,
(I) Position adjacent to the base end of the dispensing nozzle
(Ii) The position of the upper corner where the inclined portion and the horizontal portion in the extraction passage intersect, and the liquid filling in the packaging bag body is poured through the inclined portion and the horizontal portion of the extraction passage. One or more flow path weirs that form an orifice are provided at a position where the flow velocity of the flowing liquid filling is increased when discharging, and the opening width of the extraction passage at the orifice position is Ascertaining that the non-return type pouring nozzle is effective, which is 30 to 85% of the pouring passage width in a direction parallel to the opening width of the base end position of the inclined portion , The present invention has been developed.

In addition, about the said packaging bag of this invention, it is thought that a more preferable solution means can be provided if it is further set as the following structures. That is,
(1) The flow path weir is provided at a position 10 mm or more away from the opening edge formed by tearing the free end side of the horizontal part to the inclined part side,
(2) The opening formed by tearing the tip on the free end side of the horizontal portion is larger than the opening width of the extraction passage at the orifice position formed in the extraction passage by the flow path weir. Big,
(3) before Symbol inclined portion, the widthwise center line of the pouring path, the angle between the upper edge of the packaging bag body θ is, to have a slope in the range of 25 to 70 °,
It is.

  According to the non-return type pouring nozzle according to the present invention having the above-described configuration, by providing one or more flow path weirs by heat sealing in the pouring passage, pouring from the inside of the packaging bag body through the inclined portion. The liquid material that will flow into the tip opening of the discharge nozzle at once is blocked, and the liquid is directed toward the nozzle tip opening through the discharge passage (orifice) narrowed by the channel weir. The flow rate of things will be reduced. Therefore, the liquid material is guided to the opening at the tip of the nozzle in a state where the flow velocity is slow, and the dispensing is stabilized. That is, the discharge flow of the liquid material toward the opening at the tip is always stable, and the dispensing amount can be controlled appropriately.

  In addition, the flow path weir is arranged in the pouring passage of the pouring nozzle on the side opposite to the pouring nozzle tip, for example, the position adjacent to the nozzle base end portion or the inclined portion on the nozzle base end portion side thereof. When it is provided at the upper corner where the extending horizontal portion intersects, that is, at the bending position of the pouring passage, the position is such that the tip of the pouring nozzle is directed downward in order to pour out the liquid material. This is a position where the influence of hydrostatic pressure when tilting in the direction is large and the flow velocity is fast, so the above effect can be exhibited more effectively, and the dispensing is stabilized and the dispensing amount is controlled appropriately. be able to.

  Furthermore, according to the present invention, it is not necessary to narrow the tip opening for adjusting the dispensing amount, and the tip opening can be sufficiently widened to weaken (make flexible) the stiffness of the film near the tip opening. Therefore, the liquid drawing after the liquid material is stopped to be dispensed is improved, and the occurrence of dripping can be more effectively suppressed.

  The above effect is that the minimum diameter of the orifice formed by the flow path weir is 30 to 85% of the discharge passage width in the direction parallel to the orifice at the inclined portion proximal end position of the non-return type discharge nozzle. In this case, it is more effectively exhibited, and by making it within this range, there is no possibility that the smooth dispensing of the liquid material from the tip opening is hindered and the liquid material flows into the tip opening at a stretch.

  Also, by providing the flow path weir at a position that is at least 10 mm away from the opening edge of the check type pouring nozzle tip, flexible close contact between the pouring passage inner surfaces in the vicinity of the pouring nozzle tip position may be hindered. In addition, the self-sealing function can be effectively exhibited.

  In addition, by making the opening at the tip of the non-return type pouring nozzle wider than the minimum diameter of the orifice formed by the flow path weir, the thickness direction of the tip opening at the time of pouring the liquid material ( When the opening width in the direction of expansion) becomes smaller and the film at the tip of the nozzle maintains a flexible opening and closing force, and when the dispensing of the liquid is stopped, the liquid in the vicinity of the opening of the tip is directed toward the packaging bag body. Since it is sucked in, liquid drainage is improved and there is no risk of dripping.

  Further, in the non-return type dispensing nozzle according to the present invention, the upward inclination angle of the dispensing nozzle is the center line in the width direction of the dispensing passage of the inclined portion protruding obliquely upward from the upper end edge of the packaging bag body, When the angle θ formed with the upper edge of the packaging bag body is within the range of 25 to 70 °, the liquid material can be easily drained regardless of the inclination angle of the packaging bag, and the dripping Can be suppressed, and the liquid material can be poured into a required position with high accuracy.

It is a top view which shows one Embodiment of the packaging bag which provided the non-return type | mold extraction nozzle of this invention. (A) is a figure which shows the extraction characteristic of the packaging bag which provided the conventional non-return type | mold extraction nozzle, (b) is a packaging bag which provided the non-return type extraction nozzle of this invention. It is a figure which shows the relationship between the orifice by the flow-path weir provided in the extraction channel | path of a non-return type extraction nozzle, and front-end | tip opening. It is a figure which shows the upward inclination angle of the non-return type | mold extraction nozzle of this invention. It is a top view which shows other one Embodiment of the packaging bag which provided the non-return type pouring nozzle of this invention.

Embodiments of the present invention will be described below based on the drawings.
A packaging bag 1 according to an embodiment shown in FIG. 1 includes a packaging bag body 2 and a film-like dispensing nozzle 3 that communicates with the packaging bag body 2 and has a self-seal check function. The base end portion is integrally formed by, for example, fusion-bonding with the inner surface of the upper end portion of the packaging bag main body 2 in a posture protruding obliquely upward.

  Here, the pouring nozzle 3 is formed of a thermoplastic stretched base film layer, for example, a uniaxial or biaxially stretched PET layer or NY layer having a thickness of 5 to 40 μm, and the stretched base film layer sandwiched therebetween. A sealant layer, for example, an unstretched PE layer or a PP layer having a thickness of 5 to 80 μm, and a thin laminated film on each of the front and back, which has a three-layer structure, that is, a thin laminated film having two identical front and back profiles Films or a single thin laminated film that is folded back and forth at the center, etc., are fusion-bonded together, for example, by heat sealing, with the sealant layer facing each other and in the peripheral area excluding the base end It can be configured by dividing the extraction passage 4 in the central portion by equalization. The pouring nozzle 3 shown in the figure is formed by cutting the tip portion 5 by tearing or the like at the position of the V-shaped bent portion 6 to form a tip opening 7 in the pouring passage 4.

  In such a packaging bag 1, when the liquid substance in the bag is poured out, the tip portion 5 of the dispensing nozzle 3 is torn and removed as described above, so that the leading end of the dispensing passage 3 of the dispensing nozzle 3 is removed. In a state where the opening 7 is formed, the packaging bag 1 is tilted, the inner surface of the dispensing passage 4 is largely separated by the water head pressure of the liquid material, and the tip opening 7 is opened, so that the liquid material is required. Can be dispensed according to At this time, since the packaging bag body 2 contracts or collapses in accordance with the volume of liquid to be dispensed, the packaging bag 1 can be dispensed without taking in outside air.

  On the other hand, when stopping the dispensing of the liquid material, the packaging bag 1 is raised and returned to the normal state, and at the same time as the rising and returning, the dispensing passage 4 is released from the water head pressure of the liquid material and the like. In addition to returning to the original shape under the generation of negative pressure due to the return flow of the product into the packaging bag body 2, the inner surfaces wetted by the thin film of the liquid material are contained in the packaging bag body 2. The dispensing nozzle 3 has a self-seal check function that prevents the outside air from entering the packaging bag 1 by adsorbing negative pressure under the assistance of a reduced pressure atmosphere and automatically sealing and sealing the dispensing passage 4. Can be demonstrated automatically.

  Therefore, this packaging bag 1 is sufficiently protected from contact with the outside air both during and after the pouring of the liquid material, as well as oxidation and fouling of the liquid material in the bag. Etc. are effectively prevented.

  The dispensing nozzle 3 has a truncated cone-shaped inclined part 4a located on the base end part 3a side and a trapezoidal shape connected to the extended position of the inclined part 4a and parallel to the upper edge 2a of the packaging bag body 2. It is comprised by the horizontal part 4b. In the pouring nozzle 3, by providing the horizontal portion 4b, the liquid material that has flowed into the inclined portion 4a on the nozzle base end portion 3a side of the pouring passage 4 due to the tilt of the packaging bag 1 is more than the inclined portion 4a. It enters the narrow and parallel horizontal portion 4b and is rectified, and becomes a laminar flow toward the tip opening 7. Therefore, the liquid material does not scatter in an unexpected direction from the tip opening 7 of the dispensing nozzle 3, and the liquid cutting property is improved. The discharge flow of the liquid material is rectified as the portion of the horizontal portion 4b is long, and the liquid material can be discharged accurately in the target direction.

  The present invention is characterized in that one or more flow path weirs 8 are provided by heat sealing such that the pouring nozzle 3 projects into the pouring passage 4. The flow path weir 8 is formed at a position where the hydrostatic pressure is greatly affected and the flow rate is high when the packaging bag 1 is tilted in a direction in which the pouring nozzle 3 faces downward in order to pour out the liquid material. In the embodiment of FIG. 1, the flow path weir 8 is located at the upper corner where the inclined portion 4a and the horizontal portion 4b intersect in the extraction passage 4, that is, the folding of the extraction passage 4. It is provided at the song position. The flow path weir 8 forms an orifice 9 portion in the extraction passage 4, and the liquid material flowing into the extraction passage 4 from the nozzle base end portion 3 a is temporarily blocked at the position of the orifice 9. After being stopped and the flow rate is reduced, the discharge pressure (decrease in the flow rate of the discharge flow) is adjusted and the flow proceeds to the tip opening 7.

  According to this packaging bag 1, as shown in FIG. 1, the dispensing nozzle 3 protrudes obliquely upward from the upper end edge of the packaging bag body 2. In the case where it is necessary to tilt the packaging body 1 more than the side of the packaging bag body 2), the liquid material does not flow into the tip opening 7 all at once, and the liquid material is little by little. It is possible to dispense stably without causing variations in the discharge amount.

  The flow path weir 8 is not limited to the embodiment of FIG. 1 and can be provided at an appropriate position such as the base end of the dispensing nozzle 3 as shown in FIG. Further, it is preferable to provide it at a position opposite to the tip portion 5 of the dispensing nozzle in order to effectively exhibit the above-described liquid material damming effect.

  Here, when the conventional pouring nozzle 3 (FIG. 2A) without the flow path weir 8 and the pouring nozzle 3 having the flow path weir 8 shown in FIG. 1 (FIG. 2B) are used. The extraction characteristics are compared and shown in FIG. In addition, the pouring characteristic was required for filling the packaging bag 1 with 150 ml, 200 ml, 300 ml, and 400 ml of liquid material (soy sauce), and tilting each packaging bag 1 by 90 ° and pouring 50 ml of the liquid material in the bag. The time was evaluated by measuring. Note that the opening width of the tip of the pouring nozzle 3 was 7 mm, and the measurement was performed five times for each filling bag 1.

  From the result of FIG. 2, when the conventional pouring nozzle 3 is used (FIG. 2 (a)), it takes a long time to pour out 50 ml, and the liquid material flows into the tip opening 7 all at once. It can be seen that there is a large variation in the measured values for each time and the discharge amount cannot be controlled. On the other hand, when the pouring nozzle 3 having the flow path weir 8 of the present invention is used (FIG. 2B), the time until pouring is long regardless of the remaining amount of the liquid material in the packaging bag 1. Thus, it was confirmed that the liquid material can be discharged little by little, and further, there is no variation in the measurement values of 5 times, and the liquid material can be discharged while controlling the flow rate stably.

Note that the effect of Nagareroseki 8, in Luo orifice 9 position are formed by a flow path weir 8 shown in FIG. 1, the pouring path of the opening width (hereinafter referred to as minimum diameter A.), And check type This can be more effectively exhibited when the base end portion 3a of the dispensing nozzle 3 has a size of 30 to 85% of the dispensing passage width B in the direction parallel to the minimum diameter A. If it is less than 30%, the orifice 9 is too narrow and the inflow of the liquid substance is suppressed, and there is a possibility that smooth dispensing from the tip opening 7 may be hindered. The liquid material flows into the tip opening 7 at a stretch, and the discharge amount cannot be controlled.

  Moreover, it is preferable to provide the flow path weir 8 at a position 10 mm or more away from the tip opening 7 of the dispensing nozzle 3 toward the nozzle base end 3 a side. This is because if the channel weir 8 gets too close to the tip opening 7, the flexibility of the film in the vicinity of the tip opening 7 is lost (strength becomes stronger), and the close contact between the inner surfaces of the dispensing passages is hindered. This is because there is a problem that the function cannot be effectively exhibited, and that the tip opening 7 is easy to close and the liquid material in the vicinity of the tip opening 7 is pushed out, and dripping easily occurs.

  3, the width C of the tip opening 7 of the dispensing nozzle 3 is wider than the minimum diameter A of the orifice 9 formed in the dispensing passage 4 by the flow channel weir 8. When the liquid material is formed (C> A), the opening width in the thickness direction (swelling direction) of the tip opening 7 when the liquid material is poured out becomes small. When the packaging bag 1 is raised and returned to stop the operation, the drainage of liquid is improved and the occurrence of dripping can be suppressed. Moreover, since the film in the vicinity of the tip opening 7 can maintain a flexible state (a state without stiffness), the inner surfaces of the discharge passage 4 slowly come into close contact with each other after the liquid material is poured out. Therefore, it is effective that the liquid material in the vicinity of the tip opening 7 is sucked into the extraction passage 4 and the liquid material is pushed out from the tip opening 7 and adheres to the vicinity of the tip opening 7 or the dripping occurs. Can be prevented.

  As shown in FIG. 4, the upward inclination angle of the pouring nozzle 3 is such that the angle θ formed by the width direction center line α of the inclined portion 4 a of the pouring passage 4 and the upper end edge 2 a of the packaging bag body 2 is 25 to 25. It is preferable to be within a range of 70 °, preferably 40 to 60 °.

  When the inclination angle θ is less than 25 °, the tip opening 7 of the pouring nozzle 3 and the upper end edge 2a of the packaging bag body 2 are too close to each other, and the poured liquid material adheres to the packaging bag body 2 or is liquid. There is a possibility that the object cannot be discharged in the intended direction. On the other hand, when the inclination angle θ is more than 70 °, it is necessary to largely tilt the packaging bag 1 when pouring out the liquid material, so even if the flow path weir 8 is provided, The liquid material flows into the dispensing passage 4 of the dispensing nozzle 3 at a stretch, making it impossible to adjust the discharge amount, or the liquid material cannot be discharged in the intended direction, and is scattered around the surroundings. There is a risk of fouling.

Next, FIG. 5 shows another embodiment of the dispensing nozzle 3 of the present invention. The flow path weir 8 provided in the pouring nozzle 3 is located on the opposite side of the nozzle base end portion 3 a of the pouring nozzle 3 from the pouring nozzle tip portion 5. The flow path weir 8 forms an orifice 9 portion at the position of the nozzle base end 3a, and the liquid material from the packaging bag body 2 toward the dispensing passage 4 is temporarily blocked at the position of the orifice 9 After the flow rate is reduced, the discharge pressure (decrease in the flow rate of the discharge flow) is adjusted and flows into the extraction passage 4 toward the tip opening 7. As a result, the dispensing nozzle 3 is improved in stability at the position of the nozzle base end portion 3a, and does not fluctuate from side to side during the discharge of the liquid material, and the liquid material does not flow into the tip opening 7 at once. In addition, the liquid material can be stably poured out little by little and without causing variations in the discharge amount.
In the present invention, one or more flow path weirs 8 may be provided at any position in the extraction passage. For example, the upper side where the inclined portion 4a and the horizontal portion 4b in the extraction passage 4 of FIG. and the position of the corner, may be provided on both of the nozzle base end portion 3a position of FIG.

Here, using the conventional packaging bag 1 without the channel weir 8 (comparative example) and the packaging bag 1 (example) having the channel weir 8 shown in FIG. The liquid pouring angle and the pouring stop angle when the liquid material was poured from the tip opening 7 of the pouring nozzle 3 from 400 ml to 50 ml were measured. The results are shown in Table 2. Two samples (sample 1 and sample 2) were used for measurement. Moreover, in the packaging bag 1 of an Example, the opening width in the orifice 9 position of the extraction channel | path 4 formed of the flow path weir 8 is in the base end part 3a of the extraction nozzle 3 (in the direction parallel to the said opening width) . ) It was formed to be 80% of the pouring passage width.

From the results of Table 2, in the packaging bag 1 of the example provided with the flow path weir 8, the difference between the maximum value and the minimum value of the pouring angle and the pouring stop angle is small, and the results of the samples 1 and 2 are almost the same. It is clear that there is reproducibility. Further, the packaging bag 1 of the example has a small variation in the tilt angle up to the remaining amount of 150 ml, can be poured out at a stable angle, and the effect of the flow path weir 8 was confirmed.
On the other hand, in the comparative packaging bag 1 without the channel weir 8, there is a difference in the results of the sample 1 and the sample 2, and there is a variation, and when the remaining amount of liquid material in the bag is large, the influence of the internal pressure is affected. It can be easily seen that the fluctuation of the tilt angle is large.

  The present invention is a film-type non-return type pouring nozzle protruding obliquely upward from the upper edge of the packaging bag body, and is generally used for filling and packaging liquids and viscous substances such as foods and drinks, cosmetics, and drugs. Can be used for traditional packaging bags.

DESCRIPTION OF SYMBOLS 1 Packaging bag 2 Packaging bag main body 2a Upper end edge 3 Outlet nozzle 3a Nozzle base end part 4 Outlet passage 4a Inclined part 4b Horizontal part 5 End part 6 Bending part 7 End opening 8 Flow path weir 9 Orifice

Claims (4)

It is a non-return type pouring nozzle that protrudes obliquely upward from the upper edge of the packaging bag body for filling liquid material made of laminated film, and has a pouring passage communicating with the inside of the packaging bag body at the center. There,
A truncated cone-shaped inclined portion that protrudes obliquely upward from the upper end edge of the packaging bag body and forms a proximal end side, and a ladder that is connected to the extended position of the inclined portion and is parallel to the upper edge of the packaging bag body in shall be constituted by a horizontal portion of the shape, of the pouring passage, the following (i), any position of (ii), i.e.,
(I) Position adjacent to the base end of the dispensing nozzle
(Ii) The position of the upper corner where the inclined portion and the horizontal portion in the extraction passage intersect, and the liquid filling in the packaging bag body is poured through the inclined portion and the horizontal portion of the extraction passage. One or more flow path weirs that form an orifice are provided at a position where the flow velocity of the flowing liquid filling is increased when discharging, and the opening width of the extraction passage at the orifice position is The non-return type pouring nozzle characterized by being 30 to 85% of the pouring passage width in the direction parallel to the opening width at the base end position of the inclined portion . 2. The reverse according to claim 1 , wherein the flow path weir is provided at a position separated by 10 mm or more from the opening edge formed by tearing the free end portion side of the horizontal portion toward the inclined portion side. Stop type pouring nozzle. The opening formed by tearing the tip of the free end side of the horizontal part, in the orifice position formed on the pouring passage by the flow path weir, is greater than the opening width of the noted output passage The non-return type pouring nozzle according to claim 1 or 2 characterized by things. The inclined portion has a widthwise center line of the pouring path, the angle between the upper edge of the packaging bag body θ is, claim 1 to 3, characterized in that it has a slope in the range of 25 to 70 ° The non-return type pouring nozzle according to any one of the above.

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