JP5459640B2 - Antibacterial and antibacterial nozzles for liquid extraction - Google Patents

Description

  The present invention is formed by superimposing two soft and flat plastic laminated films (hereinafter referred to as “laminated films”) with a high degree of flatness, and automatically prevents the outside air from entering the bag. With regard to a nozzle for liquid material extraction having a self-sealing function, that is, a self-sealing check function, it is possible to prevent microorganisms from entering the nozzle, and even if microorganisms enter, the activity is blocked at the outlet. Provided with antibacterial and antibacterial nozzle for liquid material extraction.

Self seal check function with supra, as the nozzle pouring liquid material consisting of a plastic laminate film, there are those as disclosed in Patent Documents 1 and 2.
JP 2005-15029 A JP-A-2005-59958

  The non-returning function of the liquid material dispensing nozzle disclosed in Patent Documents 1 and 2 is that two plastic laminated films that can be adhered to each other are overlapped and face each other, and between the laminated films that overlap. The formed dispensing passage is in close contact with the liquid substance (liquid film) by capillary action and always exhibits a self-seal check function. Therefore, as a plastic film used for the liquid material dispensing nozzle, it is considered preferable to use a thin and flexible laminated film in order to reliably exhibit the above-described check function.

  Such a liquid pouring nozzle can prevent the intrusion of outside air, so it can be used to oxidize oil, sake, wine, detergent, liquid medicine, cosmetics, etc. It is suitable for packaging an object to be packaged that generates fouling or a decrease in flavor.

  By the way, as such a packaging bag for food and drink, etc., not only the above-described prevention of deterioration due to oxidation of the packaged goods, contamination, etc. by preventing the entry of outside air into the packaging bag, but also microorganisms It has been demanded to have a function of preventing intrusion into the bag. As described above, the check nozzle has no lid and has a self-seal check function instead. This non-return function, which replaces the lid, is exhibited by the presence of the liquid package in the gap between the two laminated plastic films that make up the nozzle. Things are always exposed to the outside. Therefore, there is a possibility that bacteria, microorganisms, etc. may adhere to this part and the packaged item in the bag may be contaminated.

  Therefore, the present invention improves the above-described conventional nozzle for discharging a liquid material having a self-seal check function, and can effectively prevent the intrusion of outside air and also reliably prevent the invasion of microorganisms. The purpose is to propose an antibacterial and antibacterial nozzle for pouring liquid material that can restrict its activity to the spout portion even if it has entered.

As a result of intensive studies to achieve the above object, the inventors have developed the present invention according to the following summary configuration. That is, the present invention is attached to the side or top of the bag body, and includes a base end portion of the two laminated plastic films which are overlapped and connected to the bag body and a pouring path for the liquid package. The outer peripheral part excluding the central part to be formed is fused to each other, and the liquid film of the liquid package is interposed in the minute gap formed between the laminated plastic films, so that the outside air is put into the bag. In the film-like non-return nozzle having an outer non-return function for preventing intrusion, the two front and back laminated plastic films have a surface roughness Ra of 2 μm or less on the inner surface serving as a dispensing passage, and the lamination of the film-shaped non-return nozzle formed by a plastic film, the flatness of the spout portion obtained by opening the least-edge portion content, of the minute gap after the discharge of the liquid material to be packaged In the interval Ri Ah in 2 to 5 mu m, the spout portion, with a sealable by crystals precipitated by evaporation of water from the liquid film remaining in the micro gap, the liquid film after crystallization water activity of a antibacterial antibacterial nozzle pouring liquid material, characterized in der Rukoto following 0.60Aw.

In the present invention, the liquid antibacterial and antibacterial nozzle for pouring the liquid is
(1) the liquid film, a Na, Cl, K, O and liquid material containing any one or more of C Rukoto,
(2) the front and back sides of two laminated plastic film, or at least one of the inner surface, said spout wetting the inner surface of the passage-treated wet strengthened surface der Rukoto,
Is a more preferable solution.
Moreover, this invention can be utilized suitably as antibacterial and antibacterial methods for a liquid material dispensing film-like check nozzle.

According to the antibacterial and antibacterial nozzle for liquid material pouring of the present invention, as a laminated plastic film having two front and back surfaces constituting a liquid material pouring check nozzle having a self-sealing check function, By using a flat film having a surface roughness Ra of 2 μm or less on the surface side, at the spout portion obtained by opening at least the tip end portion of the film-like check nozzle, after opening the nozzle (the liquid package discharge after), it could be very narrow as 2 to 5 mu m gaps between the overlapping laminated plastic films mutually. Therefore, there is a low probability that falling bacteria, dust, etc. contained in the air will adhere to the spout when the nozzle is closed, that is, the liquid package interposed between the plastic films. Intrusion can be suppressed.

  Moreover, in the present invention, by narrowing the gap between the laminated plastic films, the fluidity of the liquid film interposed in the gap becomes extremely poor, and the concentration of the liquid film is particularly reduced by the evaporation of moisture from the vicinity of the spout. It rapidly rises and the water activity decreases in a short time (several tens of seconds to several minutes), and further crystallizes via a paste. As a result, the crystal functions as a lid stopper of the check nozzle (hereinafter referred to as “cap function”), and the invasion of microorganisms into the nozzle can be reliably prevented.

  Further, as described above, in the liquid film interposed in the gap between the films, the water activity is lowered by the evaporation of the water, so that the activity can be suppressed even if the microorganisms enter the check nozzle. There is an effect.

  In the present invention, the liquid material constituting the liquid film preferably contains at least one or more of Na, Cl, K, O, and C. These components are crystallized together with the evaporation of water, The cap function of the antibacterial and antibacterial nozzle of the invention can be effectively exhibited.

  According to the present invention, by applying a wetting treatment to the inner surface of the extraction passage of the antibacterial / antibacterial nozzle, the liquid packaged material is placed between the two laminated films on the front and back sides forming the nozzle. Capillary action makes it possible to intervene on the inner surface at all times, and at this time, it provides high adhesion derived from the intermolecular force generated between the films, ensuring the self-sealing check function of antibacterial and antibacterial nozzles more reliably. It can be demonstrated.

It is a figure which shows the non-return function of the antibacterial and antibacterial nozzle for liquid substance extraction which concerns on this invention. It is a figure which shows one Embodiment of the flexible packaging bag formed by protrudingly providing the antibacterial and antibacterial nozzle for liquid substance extraction which concerns on this invention. It is the result of having measured the weight of the soy sauce enclosed in the antibacterial and antibacterial nozzle for liquid substance extraction which concerns on this invention with elapsed time. It is a microscope picture which shows the crystal | crystallization which precipitated at the spout of the antibacterial and antibacterial nozzle for liquid substance extraction which concerns on this invention. 4 shows the analysis result of the precipitated crystal of FIG. 4, (A) the elemental analysis result by the energy dispersive X-ray analyzer, and (B) the crystal structure analysis result by the X-ray diffractometer. It is a figure which shows the mechanism of crystallization of the antibacterial and antibacterial nozzle for liquid substance extraction which concerns on this invention. It is an expanded sectional view in the planned opening position (spout port) of the antibacterial and antibacterial nozzle for liquid material extraction according to the present invention.

  A liquid material dispensing check nozzle having a self-sealing check function that automatically prevents the outside air from entering the bag is a thermoplastic, uniaxially or biaxially stretched base film layer, and one of them. Or a two-layer or three-layer laminate film (hereinafter, described as an example of three layers) composed of a sealant layer laminated so as to sandwich both sides of the laminate film, Packaging the laminated plastic films on each side, for example, the sealant layers facing each other in a pair of laminated plastic films, or the laminated plastic films facing each other of one laminated plastic film folded in half width For the outer peripheral part excluding the base part connected to the bag body of the bag and the central part serving as the liquid pouring passage, , High-frequency sealing, or, in another by flat fused so as not wrinkle by impulse sealing or the like, and is formed to assume a substantially wedge-shaped as a whole.

  The non-return function of the liquid material dispensing check nozzle means that when the packaged material is poured out of the packaging bag, the liquid packaged material is filled with air or the like instead of the packaged product. An inner non-returning function for preventing entry into the bag body, for example, a non-returning function for preventing a packaged article from being discharged from the bag body, such as a check valve of JP-A-2005-52596; Are different.

That is, as shown in FIG. 1, the non-return nozzle for pouring out the liquid material has two flat plastic films that can be brought into close contact with each other and face each other. By always interposing a liquid film made of a liquid substance in the gap by capillary action, the two plastic films on the front and back surfaces are brought into close contact by the intermolecular force of the liquid film, and the self-seal check function is exhibited. A two-sided plastic film with a high flatness (flatness) has a higher check effect.
The upper photo in Fig. 1 shows the state before the soy sauce is interposed as a liquid material between the two plastic films on the front and back, and the lower diagram shows the soy sauce injected as a liquid material between the two plastic films. It is the cross-sectional photograph (Olympus laser microscope LEXT OLS4000 differential interference) which shows the state after having performed. From this figure, it can be seen that the two plastic films are brought into close contact with each other due to the intermolecular force of the soy sauce film injected between them, and the gap becomes narrow (26 μm → 2 μm).

  As shown in FIG. 2, the liquid material dispensing check nozzle has a sealant layer that is located on the outer surface of its base end, for example, various unstretched polyethylene layers or polypropylene layers. As a flexible bag main body, it is preferable that a flexible packaging bag is obtained by fusing the same kind of sealant layer with heat seal or the like so as to protrude outward from the side of the bag main body. Can do.

  And the non-return nozzle for liquid substance pouring is opened by cutting off the planned opening portion (the tip side from the position where the tear guide rod or notch is added) formed near the tip, thereby forming a spout. .

In the present invention, as a result of examining a method capable of effectively suppressing the invasion of microorganisms and the like from the nozzle spout with respect to such a liquid material discharge check nozzle, the check nozzle has a surface roughness Ra of 2 μm or less. After opening the nozzle (after discharging the liquid package) at the spout portion obtained by opening at least the tip end portion of the film-like non-return nozzle formed using two laminated plastic films with flat front and back surfaces was found that is possible to a very small gap between the plastic film mutually superposed flat laminated film each other enough can be maintained at normal time 2 5 .mu.m and film-shaped non-return nozzle of an effective.

That is, in the present invention, since the flatness of the spout portion obtained by opening the at least a tip end portion, in the intervals of the minute gap after the discharge of the liquid packed material is 2 to 5 mu m,
(1) The opening area of the spout of the antibacterial / antibacterial nozzle is reduced, and the probability that bacteria falling in the air adhere to the nozzle spout (liquid packaged object exposed at the spout) is extremely low. With
(2) Crystallization of the liquid film intervening in the minute gap, particularly at the antibacterial / antibacterial nozzle spout, is promoted, and the crystal fulfills the cap function of the antibacterial / antibacterial nozzle, so that microorganisms enter the nozzle. Even if microorganisms enter the nozzle, their activity can be prevented.

These effects were verified by the following verification test.
(1) About the effect of preventing the falling bacteria from adhering (a) About the antibacterial bacteria in the air and the adhesion to the antibacterial nozzle opening As a test method, petri dish (φ90mm: 64cm ² ) of the epilepsy medium is installed in five places. Then, after leaving them for 60 minutes to allow falling bacteria to adhere and counting the number of falling bacteria and falling fungi, one falling bacteria adheres to the opening of the antibacterial / antibacterial nozzle from the number of falling bacteria The time required for The area of the opening of the antibacterial / antibacterial nozzle was such that the opening gap was 3 μm and the length of the opening was 8 mm. The culture conditions were the number of bacteria falling: 35 ° C., 3 days, the number of fungi falling: 25 ° C., 7 Day. The results are shown in Table 1.

From the results of Table 1, it was found that the probability of falling bacteria adhering to the narrow opening of the antibacterial / antibacterial nozzle of the present invention was as extremely low as one on 417 days.
Further, the antibacterial / antibacterial nozzle of the present invention is preferably provided so as to protrude from the side of the bag body as shown in FIG. 2, and according to this, the spout of the antibacterial / antibacterial nozzle is closed. At that time, it is always held in a vertical state with respect to the atmosphere, and according to the inventor's experiment, the probability that the falling bacteria adhere to the spout is further 1 as compared with the case where it is held in a horizontal state. / 7 times, and extremely low at 1 piece / 2800 days.

(B) Adhering to the antibacterial / antibacterial nozzle opening by air blowing experiment Next, air is blown toward the spout of the antibacterial / antibacterial nozzle, and the presence or absence of falling bacteria in the nozzle at that time Was investigated.
As a test method, a fan was placed at a position 20 cm away from the nozzle outlet, and air blowing was continued toward the nozzle outlet for 24 hours. In addition, the wind speed was measured with the air meter (made by Digital ANEMONETER GA-06 beads). Thereafter, the cells were cultured at 37 ° C., and the growth of the bacteria was observed over time. For those in which no growth of bacteria was observed, the cells were enriched and cultured at 30 ° C. for 24 hours in tryptic soy bouillon medium + 0.6% Yeast Extract (TSBYE), smeared on a standard agar medium, and then incubated at 37 ° C. for 48 hours. The culture was performed for a while to confirm the presence or absence of fungus growth. The area of the opening of the antibacterial / antibacterial nozzle was such that the opening gap was 3 μm and the opening length was 8 mm.

  As a result of applying winds with wind speeds of 1.1 m / s and 3.0 m / s, invasion of falling bacteria and the like from the nozzle spout was not confirmed.

  From the results of the verification tests (a) and (b) above, in normal use, the possibility of adhesion of falling bacteria and the like to the nozzle spout with a narrow opening and entry into the nozzle is extremely low. It has been verified that the antibacterial and antibacterial nozzle of the invention can effectively suppress the invasion of falling bacteria and the like.

Next, the mechanism of the cap function of the antibacterial / antibacterial nozzle of (2) above was verified.
First, the inventor sealed 10 μl of soy sauce as a liquid in the antibacterial and antibacterial nozzle of the present invention, and observed changes in the weight of soy sauce over time. The result is shown in FIG.

  As a result, in the vicinity of the spout obtained by cutting off and opening the tip of the antibacterial / antibacterial nozzle, the liquid film repeatedly undergoes phase change (liquid → crystallization → liquid) under the evaporation interface at a cycle of about 800 seconds, and finally As shown in FIG. 4, it was found that crystals were deposited on the entire end of the spout, and the spout was closed by the crystal. It was also found that the crystal grows from the end of the spout to the inside over time. This crystal was analyzed by an energy dispersive X-ray analyzer (JSM-5310LV JED2140) and an X-ray diffractometer (RIANT-2500) (FIG. 5), and was found to be sodium chloride (NaCl: salt). It was.

  In the meantime, in the liquid film, as shown in FIG. 6, (I) Moisture evaporation and concentration increase: As moisture evaporation from soy sauce proceeds, concentration and diffusion under the evaporation interface proceed simultaneously, and the concentration at the evaporation interface gradually increases. To do. (II) Formation of crystal film: Water evaporation further proceeds, and crystal nuclei are generated and grown by concentration under the evaporation interface to form a crystal film. (III) Diffusion proceeds due to dissolution of the crystal film: The evaporation rate is slowed down by the crystal film, and dissolution of the crystal film starts by the low concentration of soy sauce in the antibacterial / antibacterial nozzle. It is estimated that the phenomena (I) to (III) are repeated at a cycle of about 800 to 1200 seconds.

Crystallization of the liquid film, the liquid composing the liquid film, in a very narrow (2 to 5 mu m) gap between the laminated plastic film constituting the nozzle, and concentrated by water evaporation to high viscosity It seems that the liquidity and diffusion were hindered. Note that the crystallization of the liquid film is favorably manifested when water is evaporated from the liquid film and the solid concentration becomes 50 to 80%.

Based on the above verification results, in the present invention, the flatness of the spout portion obtained by opening the at least a tip end portion, in the intervals of the minute gap after the discharge of the liquid packed material at 2 to 5 mu m In this way, a small amount of liquid material (liquid film) intervening at the nozzle tip (outlet) can be transferred in a short time (tens of seconds to several minutes) in the above (I) to ( It is possible to provide an antibacterial / antibacterial nozzle having the above-mentioned cap function by repeating the phenomenon of III) and crystallization with high viscosity (high concentration).

  Furthermore, in the liquid film interposed in the narrow gap, the water activity becomes low due to the evaporation of water, so even if microorganisms enter from the antibacterial / antibacterial nozzle opening, the activity is suppressed and cannot grow. The effect can be expected. The water activity represents water necessary for the growth of microorganisms and enzyme activity, and the amount of free water in the water is expressed in units of water activity (aw). And when water activity is 0.60aw or less, it is said that all the microorganisms cannot proliferate.

In addition, when the gap between the films of the check nozzle is at least in the nozzle spout portion and the micro gap is more than 5 μm, the area at the time of closing the nozzle spout becomes large, so the probability of falling bacteria increases, Since it takes time to crystallize the liquid film, the cap function may not be effectively exhibited.

  In the present invention, as the liquid material constituting the liquid film, it is preferable to use one containing at least one element component of elements such as Na, Cl, K, O and C. This is because it is easy to crystallize by evaporation of moisture, and is preferable for exhibiting the cap function.

In order to maintain the gap between the laminated film each other after the nozzle opening as described above always 2 to 5 mu m, the surface roughness Ra of the nozzle surface of the laminated film are as small as 2μm or less, and Even when the peripheral portion is heat-sealed, it needs to be flat. This is because, when the surface roughness Ra exceeds 2 μm, the adhesion force derived from the intermolecular force generated by the liquid film consisting of a liquid material always intervening in the minute gap between the two laminated plastic films. This is because the gap becomes smaller and the gap cannot always be kept small ( 2 to 5 μm ) .

  By the way, each of the two front and back laminated films constituting the antibacterial / antibacterial nozzle of the present invention preferably has a three-layer structure of at least a base film layer (support base material) and a sealant layer laminated on each side. The base film layer is preferably made of polyethylene terephthalate, nylon, polyester, polypropylene or EVOH, and the sealant layer is made of polyethylene, polypropylene, ethylene vinyl acetate copolymer layer, ethylene ethyl acrylate copolymer layer, ionomer layer, or the like. Preferably it consists of. The sealant layer is laminated by a melt extrusion laminating method or a dry laminating method, an extrusion laminating method, a coextrusion laminating method, or the like on the base film layer.

  Further, in the present invention, the inner surface of the pour-out passage of at least one of the two front and back laminated films constituting the antibacterial / antibacterial nozzle, preferably the inner surface of the bag main body portion, the inward facing described above. It is effective to apply a wetting treatment in order to make the adhesion force derived from the fact that the intermolecular force acting between the films for generating the non-return function narrows due to the interposition of the liquid material. . By providing this wetting surface on the inside of the discharge passage of the antibacterial / antibacterial nozzle, the liquid package is placed on the inner surface of the discharge passage between the two laminated films that form the antibacterial / antibacterial nozzle. The adhesion force derived from the intermolecular force generated by the constant intervening action is generated, and the above-described inward check function (preventing the entry of outside air into the bag) can be more reliably exhibited.

The wetting treatment is, for example, a wetting treatment using a corona discharge treatment, a UV ozone treatment, a plasma treatment, a flame treatment or the like as a suitable example on the surface of a sealant film of a laminated film made of PE, PP, EVA , ionomer or the like. This is a process that improves the wettability of the film due to the synergistic effect of physical surface modification of the film surface and chemical surface modification by the generation of polar functional groups. Is referred to as a wetting surface (also referred to as a “wet strengthening surface”).

  Now, in the antibacterial / antibacterial nozzle of the present invention, the length of the nozzle spout edge extending substantially in the width direction (vertical direction) of the laminated plastic film is about 5 to 100 mm regardless of the number of laminated plastic films. However, the “substantially width direction” in this case means that the tear direction, and thus the extending direction of the nozzle opening edge, is 0 with respect to the width direction of the laminated plastic film, as described above. It is considered that it may be inclined at an angle in the range of ˜15 °. If the length of the antibacterial / antibacterial nozzle opening is less than 5 mm, the amount of dispensing is too small in relation to the volume of the bag body, whereas if it exceeds 100 mm, it is difficult to accurately specify the dispensing direction.

  Next, specific forms of the antibacterial / antibacterial nozzle according to the present invention will be described with reference to the drawings. FIG. 2 is a view showing an embodiment of a flexible packaging bag formed by projecting antibacterial and antibacterial nozzles according to the present invention. In the figure, reference numeral 1 denotes an antibacterial / antibacterial nozzle. The antibacterial / antibacterial nozzle 1 is a fusion part at the side of the bag body 2, and an outermost sealant layer, preferably an inner surface sealant layer. The base end portion is fusion-bonded by a sealant layer made of the same kind of resin material as the sealant layer of the bag body to constitute the flexible packaging bag A.

  Further, in FIG. 2, the antibacterial / antibacterial nozzle 1 includes opening means such as an I notch, a V notch, a U notch, a base notch, and a diamond cut at a predetermined opening position (spout port) of the upper edge portion thereof. It is preferable to provide the tear guide rod 1a, and the tear guide rod 1a is opened to form the spout 20 for use.

  Note that the antibacterial / antibacterial nozzle 1 is externally attached to the spout 20 formed as described above from the side of the bag body 2 as shown in FIG. It is preferable to perform fusion-bonding so as to project in the direction.

In the present invention, as shown in FIG. 7 in an enlarged cross-sectional view along the line III-III in the nozzle width direction of FIG. 2, the respective laminated plastic films 3 and 4 constituting the antibacterial / antibacterial nozzle 1 are small surface roughness Ra of the sealant layer 6, 6 'of the inner surface side and 2 [mu] m or less, thereby to place the laminated plastic film 3,4 gap 8 between each other are always kept at 2 to 5 mu m There are features.

That is, in the present invention, since the gap 8 between the laminated plastic films 3 and 4 is as narrow as 2 to 5 μm, the spout 20 formed by opening the tip of the antibacterial / antibacterial nozzle 1 is closed. The area at the time, that is, the area of the liquid package to be exposed at the spout 20 is reduced, the possibility of falling bacteria in the air entering the nozzle is reduced, and a small amount of liquid film interposed in the gap 8 is formed. In particular, in the vicinity of the spout 20 of the antibacterial / antibacterial nozzle 1, it concentrates in a short time to precipitate crystals, and the cap function by the crystals effectively prevents the entry of microorganisms into the antibacterial / antibacterial nozzles 1. can do.

  Each of the films 3 and 4 includes a base film layer 5 and 5 ′, and a sealant layer 6, 6 ′, 7 and 7 ′ laminated on the inner surface side and the outer surface side of the base film layer 5 and 5 ′, respectively. In the layer structure, the sealant layers 6 and 6 ′ on the inner surfaces facing each other are arranged with a predetermined width, for example, a width of 0.5 to 3 mm, preferably 1.0 to 2.0 mm, in the peripheral portion excluding the base end side. It can be manufactured easily, quickly and always reliably by fusing under a desired shape over a width, preferably by heat sealing, and the antibacterial / antibacterial nozzle 1 is in its flat shape. At the base end thereof, the outer surface side sealant layers 7 and 7 'are fused to the inner surface of the bag body 2 preferably also by heat sealing, so that the bag body 2 is always properly and reliably, Moreover, it can be easily joined Kill.

  The antibacterial / antibacterial nozzle 1 is preferably provided with a spire-like protrusion 1b for preventing dripping at a position slightly closer to the base end side than the planned opening portion at the lower edge thereof. The protrusion 1b is provided to prevent dripping generated from the opening end of the antibacterial / antibacterial nozzle 1 from being transferred from the lower edge of the antibacterial / antibacterial nozzle 1 to the bag body portion 2.

  On the outer surface of the antibacterial / antibacterial nozzle 1, that is, the outer surface from the planned tear line (scheduled opening) to the base end side of the base film layers 5 and 5 ′, as illustrated by dot display in FIG. It is preferable to provide a water-repellent or oil-repellent coating layer (water-repellent or oil-repellent coating layer) 10 for preventing dripping and improving drainage along at least the opening edge and the lower edge.

  At the same time, the provision of the water-repellent or oil-repellent coating layer 10 on the spire-like protrusion 1b for preventing dripping can further improve the liquid drainage.

In addition, as the coating layer 10, a water repellent coating agent made of silicone oil, fluorine resin, acrylic resin or amide resin is used as the water repellent, and silicon resin or Teflon resin (registered trademark) , Using oil-repellent coating agents such as silicone-modified acrylic resins, urethane, acrylic, ester, nitrified cotton, amide, vinyl chloride, rubber, styrene, olefin, vinyl chloride, cellulose, What added phenol resin etc. as a binder can be used.

  Further, as shown in FIG. 7, the surface of the inner surface side sealant layers 6 and 6 ′ of the antibacterial / antibacterial nozzle 1, particularly the inner surface of the portion where the gap 8 (pumping passage 8) is formed, is corona discharge treatment or the like. It is preferable that the wettability-enhanced surface and the wet-treated layer 11 are formed by applying the above, whereby the inward check function can be effectively exhibited.

  The technology of the present invention can be used for a filling package of a liquid material, particularly a packaging bag having a liquid spout, which is highly necessary to prevent contamination by microorganisms such as foods and drinks and medicines.

A Flexible packaging bag 1 Antibacterial / antibacterial nozzle 1a Tear guide rod 1b Dripping prevention protrusion 1c Liquid reservoir part 2 Bag body part 3, 4 Laminated film 5, 5 'Base film layer 6, 6' Inner sealant layer 7, 7 ' Outer sealant layer 8 Clearance (pouring passage)
10 Water / oil repellent coating layer 11 Wetting layer 20 Spout

Claims (3)

Attached to the side or top of the bag body, excluding the overlapping two parts of the laminated plastic film, the base end connected to the bag body and the central part that forms the pouring passage for the liquid package The outer peripheral portion is fused to each other, and the liquid film of the liquid package is interposed in the minute gap formed between the laminated plastic films, thereby preventing the outside air from entering the bag. In a film-like check nozzle having a stop function,
Laminated plastic film of the front and back sheets, the inner surface of the pouring path has a surface roughness of less than Ra 2 [mu] m, and, of the film-shaped non-return nozzles formed by the laminated plastic film, at least-edge flatness of spout portion obtained by opening the part content, in the intervals of the minute gap after the discharge of the liquid packed material Ri Ah in 2 to 5 mu m,
The spout portion, together with a sealable by crystals precipitated by evaporation of water from the liquid film remaining in the small gap, the water activity is less der Rukoto 0.60aw of the liquid film after crystallization Antibacterial and antibacterial nozzle for liquid material extraction. 2. The antibacterial and antibacterial nozzle for pouring liquid material according to claim 1, wherein the liquid film is made of a liquid material containing at least one of Na, Cl, K, O and C. Of the front and back sheets of laminated plastic films, one of the inner surface even without less, the liquid product according to claim 1 or 2, characterized in that a wet strengthening surface which inner surface has been wet processes the pouring path Antibacterial and antibacterial nozzle for dispensing.

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