JP2003321030A - Filter and container with the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a filter and a container with the filter which does not clog easily and yet catches a solid item, etc., efficiently. <P>SOLUTION: This filter is formed with a protrusion projecting on the side for an agent to be filtered of the filter part for filtering the agent. A container is mounted with the filter. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a solid matter, an aggregate,
A filtration filter that can easily filter a solution containing coagulated substances, in particular, a spout that is connected to the spout of a plastic bag or bottle product used for liquid foods, enteral nutrients, or the spout of the container body. The present invention relates to a simple filtration filter that can be easily attached to a member and can be filtered, and a container using the simple filtration filter.

[0002]

2. Description of the Related Art Conventionally, solutions containing solids, agglomerates, coagulated substances, etc. include teas and juices containing fruit juice and the like, and the agglomeration of tea leaves and fruit juices contained therein. When you want to remove things, tea strainers and cucumbers have been used. In addition, in hospitals and the like, when it is not possible to drink by themselves, a drink is given by a tube or the like that is connected to a container containing a content or contents by using a pouring member or the like.

In a simple sieve such as a tea strainer or a kyusu, if solids, aggregates, coagulated substances and the like cover the surface of the sieve, clogging occurs. Even when sucking or giving a drink using a tube, clogging occurs if there are solids, aggregates, coagulated substances, and the like. Further, in enteral nutritional products mainly used in hospitals and the like, there are various forms such as a metal can, a plastic bottle, a plastic bag, a pouch, and a paper container as a container, in order to preserve the contents for a long time, Sterilization / sterilization may be performed. In addition, various containers have a spout for discharging the contents, some of which are formed integrally with the container, such as plastic bottles, and other pouches with spouts, paper containers with spouts, etc. Some are formed by the body's pouring member to ensure good pouring of the contents. The sterilization / sterilization treatment includes a method in which the contents are sterilized at high temperature and then filled in an aseptic container, a method in which the container is heated and sterilized (retort sterilization) after filling the contents. If this content contains a protein that causes heat denaturation, the content and the presence of other substances may cause aggregation or coagulation due to sterilization / sterilization. In the conventional containers, the emphasis was on the pouring of the contents, and the reality was that no measures were taken to prevent the discharge of these aggregates and coagulated substances.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems and actual conditions, and is not likely to cause clogging, and is a simple and easy way to capture solid substances and the like. An object is to provide a filtration filter and a container equipped with the filtration filter.

[0005]

Means for Solving the Problems The filtration filter of the present invention comprises:
Attached to the spout of the container containing the liquid to be filtered or to the spout member connected to the spout of the container body.In the filtration filter used, the projection for filtering the liquid to be filtered has a protrusion on the side of the liquid to be filtered. The above-mentioned object is achieved by projecting and forming.

Further, the container of the present invention achieves the above-mentioned object by mounting the filtration filter on the outlet of the container. A pouch with a spout in which a filter is attached to a spout is suitable for the container in which a filter is attached to the outlet of the container. Further, the pouch with a spout equipped with the filter of the present invention is suitable when the contents are filled with a liquid food, an enteral nutrient or the like for use.

According to the present invention, by adopting the above-mentioned constitution, it is possible to three-dimensionally capture solids, agglomerates, coagulated substances, etc. by the projections and the sieving portion, and moreover, it occurs after retort sterilization. Since many agglomerates are in the form of a film, the agglomerates and the like captured at the tips of the protrusions are separated from the sieving portion, so that the sieving portion itself is less likely to be clogged.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an explanatory plan view of the filtration filter of the present invention,
FIG. 2 is an enlarged cross-sectional explanatory view taken along the line AA of FIG. In both figures, 1 is a filtration filter, which is composed of a sieving portion 2 and a plurality of protrusions 3. The shape of the simple filter of the present invention is not limited to the illustrated example. Further, the outlet of the container body or the outlet member connected to the outlet of the container body and the filtration filter may be integrally formed.

The sieving portion 2 is composed of a frame body 21 and a lattice member 22 which forms sieving eyes 2a in the frame body 21. The shape of the frame 21 may be circular, rectangular, heart-shaped or the like, but for example, a short cylinder having an outer diameter that can be fitted into a spout or a spout member of a container (not shown) containing a liquid to be filtered. It is desirable to provide a fitting mechanism in order to prevent the dropout from the spout and the spout member. The fitting mechanism may be formed in any specific method, but for example, it is easy to provide a stepped portion 21a in which a part of the frame body 21 is thickened on the side opposite to the protrusion 3. The thickness of the lattice member 22 and the size of the sieve 2a are appropriately selected according to the liquid to be filtered, but the thickness of the lattice member 22 is 0.5 to 1.5 mm at the longest cross-section, particularly 0. 0.5-1.0 mm
It is desirable that the longest portion of the sieve mesh 2a be 3 mm or less, particularly 0.5 to 1.5 mm. The cross-sectional shape of the grid member 22 may be circular, rectangular or the like. Also, the sieve eye 2a
The shape of A may be any shape such as a board shape, a radial shape, a honeycomb shape, or a circular hole shape, but it is desirable that the size of the eyes be uniform.

The shape of the protrusion 3 is a cylinder, a square pole, a triangle pole,
Whether it is a cone, a triangular cone, a cylinder with a sphere, or the like, it is appropriately selected depending on the liquid to be filtered. The length of the protrusion 3 is appropriately selected depending on the liquid to be filtered, but is 1 to 5 mm, particularly 1 to 3 mm.
It is desirable to set to mm. Further, the thickness of the protrusion 3 is appropriately selected depending on the liquid to be filtered, but the longest section of the cross section is 0.5.
.About.2.2 mm, particularly preferably 0.5 to 1.5 mm. The protrusions 3 are formed so as to protrude toward the liquid to be filtered, and the distance between the protrusions is preferably 1 to 5 mm, and particularly preferably equal. The formation site of the protrusion 3 is not particularly limited as long as it is on the sieving part 2, but the intersection of the lattice members 22 is desirable. The projection 3 may be formed by any specific method, but an integrally molded body with the sieving portion 2 is preferable in terms of strength.

The material of the sieving portion 2 and the protrusions 3 is not particularly limited, but metals such as iron, aluminum, titanium and copper, and plastics such as polypropylene, polyethylene, polyethylene terephthalate and ABS resin are preferably used.

As a container to which the filtration filter 1 of the present invention is applied, for example, a pouch with a spout or the like can be mentioned (not shown). A pouch with a spout is a pouch whose container body is mainly made of a plastic film or the like, and is a container in which a spout serving as a pouring member is welded to the pouch.

This pouch with a spout filled with liquid food, enteral nutrition and the like as contents is used as a pouch for directly administering the nutrition through the tube to the digestive tract of the human body. In this case, the pouch with a spout has a hanging hole, and the hanging pouch is used by using the hole. When the filtration filter 1 is attached to the pouch with spout, aggregates are captured in the projections 3 and the sieving portion 2, and it is possible to prevent blockage due to the aggregates at the spout and clogging of catheters, tubes, and the like. Become.

When the filtration filter 1 is applied to a pouch with a spout, the filtration filter 1 is mounted on the spout so that the projections 3 project toward the liquid to be filtered, that is, inside the container. As a mounting method, various methods such as inner fitting, outer fitting, and screw fitting are possible. Polypropylene or the like is suitable as the material of the filter used in this pouch with spout.

Alternatively, the filter 1 and the spout may be integrally formed. In this case, although the shape of the filter and the spout is limited due to the design of the mold, the cost is reduced due to the reduction of the number of parts and the number of steps.

As the structure of the spout, a boat-shaped base portion welded to the pouch film, a spout cylinder portion extending outward from the center of the base portion and having a thread on the outer peripheral surface,
A sealing member that is heat-welded to the top surface of the pouring tube, a cap that is screw-fitted to the thread on the outer surface of the pouring tube, and a liquid-tight seal on the top surface of the pouring tube that is provided on the inner surface of the cap And a contact ring that contacts with. Polypropylene or the like is suitable as a material for the spout.

As the pouch body, a flat pouch made by heat-welding a pair of films as side walls of a flexible pouch, or a pair of side-wall films and a bottom film as a bottom part of the pouch can be heat-welded to be self-supporting. Standing pouch of. Further, as an example of the pouch body to be filled with liquid food or enteral nutrients, etc., a part of the pouch body in a rectangular shape, for example, having a spout in the inclined portion of one corner of the rectangle, so that the spout is facing downward. An example is a configuration in which a hanging hole for hanging is provided in a portion that is heat-welded.

The material of the pouch is appropriately selected according to the kind of contents such as barrier film (silica vapor deposition film, aluminum laminated film, etc.), nylon, polypropylene and the like. Particularly, in terms of the transparency of the content, a metal oxide thin film is preferable as the barrier film,
A specific layer structure is preferably a laminated film in which a metal oxide vapor-deposited polyethylene terephthalate layer, a biaxially stretched nylon film and a polypropylene film are laminated.

The container equipped with the filtration filter 1 of the present invention is not limited to a pouch with a spout, and other containers such as metal cans, plastic bottles, plastic bags, tube containers, paper containers, and other spouts can be used. Any container can be used as long as it has it. For example, in the case of a plastic bottle, there are those obtained by blow molding polyethylene terephthalate, polypropylene or the like, and a filter may be attached to these mouths.

The present invention will be further described with reference to test examples.

Test Example 1 Each of the filtration filters of the following standards shown in FIGS. 1 and 2 was fitted into and attached to a pouring member to which a dropping tube was connected.
Connect the spout and spout of a container (pouch with spout) filled with 400 mL of the liquid to be filtered (prepared liquid in which the following enteral nutrients have been retort sterilized to generate aggregates due to heat denaturation), and the spout part Was hung downward, and the contents were dropped into the receiver through the dropping tube. After completion of the dropping, the filtration filter was removed from the pouring member, and the trapped state of the agglomerates and the like on the protrusions was visually observed and the remaining state of the agglomerates and the like in the dropped liquid in the receiver was visually observed. Further, the amount of dropping was measured for each time until the end of dropping. The results are shown in Table 1.

* Standard shape of filtration filter: Shape of columnar projection: As shown in Table 1 (0 mm in Table 1 is a filtration filter in which no projection is formed) Thickness of projection: 1 mm longest section Mutual distance: Distance from neighboring area 3 mm Frame shape: Cross-sectional shape of circular lattice member: Square lattice member thickness: 1 mm Square sieve size: Longest part 1.5 mm

* Composition of enteral nutrition soy protein 1 g processed skim milk powder 4 g sodium casein 2 g dextrin 10 g sugar 4 g vegetable oil 2 g dietary fiber 2 g sodium ascorbate 50 mg sodium chloride 5 mg calcium gluconate 50 mg potassium chloride 75 mg perfume 300 mg water suitable total amount 100 mL

[0025]

[Table 1]

In Table 1, the trapped state of the protrusions, the collected state of the sieving portion, the remaining state of aggregates and the like in the dropping liquid and the dropping state were in accordance with the following evaluations. (1) Captured state of protrusion ⊚: Agglomerates and the like were well captured. ◯: Supplemented with aggregates and the like. Δ: Some agglomerates were added. (2) Collection condition of sieve part ⊚: Agglomerates and the like were satisfactorily captured and there was no clogging. ◯: There was no clogging by supplementing aggregates and the like. B: Occasionally, clogging was caused by supplementing aggregates and the like. X: Clogging was caused by supplementing aggregates and the like. (3) Remaining state of aggregates and the like in the dropping liquid ⊚: No aggregate or the like remained at all. ◯: Almost no aggregate remained. Δ: Some aggregates remained. (4) Dripping state ⊚: The amount of dropping per hour was constant, and the dropping was successful. ◯: The dropping amount per hour was almost constant and the dropping was possible. Δ: The dropping amount per hour was not constant, and the dropping time was extended. X: Clogging occurred and the dropping was completed.

As is clear from Table 1, the protrusion length of 1 to 5 mm, particularly 1 to 3 mm is less likely to cause clogging and is the most efficient for efficient filtration.

Test Example 2 A test was conducted in the same manner as in Test Example 1 except that a filtration filter was used in which the intervals between the protrusions were changed to those shown in Table 2.
The length of each protrusion was 2 mm. The results are shown in Table 2.

[0029]

[Table 2]

As is clear from Table 2, the interval between the projections is 1 to 5 mm, which is less likely to cause clogging and is most effective for efficient filtration.

Test Example 3 A test was carried out in the same manner as in Test Example 1 except that a filtration filter in which the thickness of the protrusion (the longest cross section) was changed to that shown in Table 3 was used. The length of each protrusion was 2 mm. The results are shown in Table 3.

[0032]

[Table 3]

As is clear from Table 3, the thickness of the protrusion is 1 to 2.2 mm at the longest cross-section, particularly 0.5 to
1.5 mm is less likely to cause clogging and is most effective for efficient filtration.

[0034]

By using the filtration filter and container of the present invention, it is possible to three-dimensionally capture solids, agglomerates, coagulated substances and the like due to the interaction between the protrusions and the sieve. In other words, the protrusions located in front of the sieving portion capture solids, aggregates, coagulated substances, etc., and the liquid to be filtered that has passed through the protrusions is filtered by the sieving portion, so the sieving portion itself becomes clogged. Is less likely to occur, and the liquid to be filtered can be effectively filtered.

[Brief description of drawings]

FIG. 1 is an explanatory plan view of a filtration filter of the present invention.

FIG. 2 is an enlarged cross-sectional explanatory view taken along the line AA of FIG.

[Explanation of symbols]

1: Filtration filter 2: Sieve part 2a: Sieve eyes 21: frame 21a: Stepped portion of frame 22: Lattice member 3: Protrusion

Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) B65D 85/72 B01D 23/02 A (72) Inventor Suga Heito 3-18-6 Miyanogidai, Hanamigawa-ku, Chiba-shi, Chiba (72) Inventor Tetsuo Kaneko 2-23-7 F Term, Narita, Narita, Chiba (Reference) 3E035 AA03 AA20 AB10 BA06 BA08 BA10 BC01 BC02 BC03 3E062 AA04 AA09 AA20 AB01 AB20 AC02 AC03 AC05 BA20 GA07 GB01 KA04 KC05 3E064 AA05 AB23 BA36 BA60 BB03 BC08 EA30 FA03 HD09 HD10 HE02 HL05 HM02 HN65 4D041 AA06 AB03 AD11 CB10 CC08

Claims (9)

[Claims] 1. A filtration filter that is used by being attached to a spout of a container body containing a liquid to be filtered or a spout member connected to a spout of the container body, wherein a projection is provided on a sieve portion for filtering the liquid to be filtered. The filter is characterized in that the filter is formed so as to protrude toward the liquid to be filtered. 2. The filtration filter according to claim 1, wherein the projection provided on the filtration filter has a pointed tip. 3. The filtration filter according to claim 1, wherein the protrusion has a length of 1 to 5 mm. 4. The filtration filter according to claim 1, wherein the distance between the protrusions is 1 to 5 mm. 5. The thickness of the protrusion is 0.5 to 0.5 at the longest portion of the cross section.
It is 2.2 mm, The filtration filter in any one of Claims 1-4 characterized by the above-mentioned. 6. A container, characterized in that the filtration filter according to any one of claims 1 to 5 is attached to a pouring part of the container. 7. The container according to claim 6, wherein the container is a pouch with a spout, and a filtration filter is attached to the spout. 8. The container according to claim 7, wherein the filter and the spout are integrally molded. 9. The container according to claim 6, wherein the contents contained in the container are liquid foods or enteral nutritional supplements.
The container according to any one of 1.