JP2000084045A - Manufacture of medical bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve cleanliness of an internal wall surface and to facilitate mass production by forming a plurality of Longitudinally parallel seal parts at equal spaces in the cross direction of a band film formed by crushing a cylindrical inflation film, and cutting the center parts of the line seal parts longitudinally. SOLUTION: A band film 16 is drawn out of a roll 14 formed by crushing a cylindrical inflation film and winding it in band shape. A plurality of line seal parts 18 are formed longitudinally parallel at constant spaces in a cross direction by a heating part 48 provided at a roller 46 of a heat-sealing device 44, and line seal parts 24 in a cross direction are formed at constant spaces by a second heat-sealing device 50. After printing in the specified positions of the band film 16, the center parts of the line seal parts 18 are cut with a cutting roller, and the band film 16 is cut by a cutter so that the line seal part 24 is made a bottom part seal part of a bag body. An internal wall surface is therefore prevented from being exposed to the outside to maintain high cleanliness.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a medical bag. TECHNICAL FIELD The present invention relates to a method for manufacturing a resin bag for storing contents with extremely high hygiene such as an infusion solution, a dialysate, and an organ preservation solution.

[0002]

2. Description of the Related Art Medical containers are replacing glass containers with resin bags. Since the resin bag is a flexible container, it does not require an air needle or the like when used. Disposal of medical bags is easier than glass containers. For this reason, resin bags are frequently used for medical bags. The body of a general medical bag is blow molded,
Alternatively, it is formed from an inflation film. The molding method of the main body of the bag is, in addition to the blow molding method and the molding method from an inflation film, a vacuum molding method, and two extruded films formed by a T-die method are stacked and heat-sealed on the four sides to form. There is a way.

[0003]

However, in the latter vacuum forming method or the method of laminating two films, the material film surface serving as the inner wall of the bag is exposed to the outside world.
Fine particles may adhere to the inner wall after back molding. In particular, when the material film is pulled out from the raw material, since the inner wall surface of the film comes into contact with a roll or the like, static electricity is generated, and fine particles may adhere even in a clean room. In order to prevent fine particles from sticking to a material film formed by a vacuum forming method or the like, a clean room environment with high cleanliness must be provided. However, such high-purity environmental equipment requires a large amount of cost, and causes difficulties in manufacturing. In the blow molding method,
Although the inner wall surface is maintained at a high degree of cleanliness, it takes time for the number of production. This means that even in the method of forming from an inflation film, the inner wall surface is maintained at a high degree of cleanliness, but it takes time for the number of products to be manufactured, which is an obstacle to mass productivity. An object of the present invention is to provide a method of manufacturing a medical bag capable of easily and easily manufacturing a large amount of medical bags whose inner wall surfaces are maintained at a high degree of cleanliness.

[0004]

SUMMARY OF THE INVENTION The present invention is directed to a method for producing a plurality of films, wherein a tubular inflation film is crushed, the band film is taken out from a raw material wound into a band, and the inner layers are heat-sealed at predetermined positions of the band film. The seal section of
The strip seals are formed parallel to each other along the longitudinal direction of the strip film at regular intervals in the width direction of the strip film, and cut substantially at the center of each strip seal section along the longitudinal direction. The present invention also provides a method of manufacturing a medical bag, wherein a plurality of cylindrical films are formed from the strip film, and the cylindrical film is used as a main body of the medical bag.

[0005] The medical bag of the manufacturing method of the present invention contains a drug solution such as an infusion solution, a dialysate, and an organ preservation solution. After the chemical solution is stored in the bag, it is generally subjected to high-pressure steam sterilization together with a medical bag. Unlike the conventional high-pressure steam sterilization, it is desirable to perform the treatment at a temperature of 120 ° C. or higher. At such a processing temperature, sterilization of the chemical solution can be performed completely and quickly. The medical bag of the manufacturing method of the present invention is made of resin, and the wall of the resin bag basically has transparency and flexibility. The transparency of the bag is such that impurities such as precipitates and fine particles in the chemical solution contained in the bag can be confirmed. The flexibility of the bag is such that the contained chemical liquid can be naturally dropped from an outlet or the like to which a drip needle or the like is attached.

[0006] The back body is formed from an inflation film. When the wall of the back body has a laminated structure of resin, the film or sheet is formed by co-extrusion. The resin material for the medical bag is a general-purpose resin such as polyolefin resin, vinyl chloride, vinylidene chloride resin, polyester resin, polyvinyl alcohol resin, polyacrylonitrile resin, polyacrylic resin, and polyamide resin. is there. Further, the resin bag may be formed in a single layer or a multilayer.
The innermost layer that comes into contact with the drug in the container is preferably a resin layer that does not affect the drug and does not generate elutes. As such a resin, a polyolefin-based resin is desirable, for example, low, medium, high-density polyethylene,
Examples include lower olefin resins such as polypropylene.

In the production method of the present invention, the above resin material is formed into a tubular inflation film. As the inflation film forming method, there is a method in which the resin is extruded from a circular die, and the resin is directed upward, horizontally, or downward with respect to the blowing direction of the film. In the present invention, each film forming method is a property of each resin,
It can be appropriately selected according to the film forming efficiency and the film size. The cylindrical film extruded from the circular die is crushed by being sandwiched between nip rolls of a take-up machine and wound up into a raw material. The strip-shaped film crushed is taken out from the raw material, and a plurality of strip seals are provided at predetermined positions of the strip-shaped film, the inner walls being heat-sealed with each other, and the strip seals are arranged at regular intervals in the width direction of the strip-shaped film. In this case, the belt-like film is formed in parallel along the longitudinal direction. To form a plurality of seal portions parallel to each other along the longitudinal direction of the strip film means that parallel seal strips are formed at regular intervals in the width direction of the strip-shaped inflation film along the drawing direction of the blown film. Means to do. Examples of the heat seal between the inner walls include bonding by external heating such as heat sealing and impulse sealing, and bonding by internal heating such as ultrasonic bonding and high-frequency bonding.

A substantially central portion of each of the strip seal portions is cut along the longitudinal direction to form a plurality of cylindrical films from the strip film. The sealing portion of each strip is formed with a certain width in the longitudinal direction of the strip-shaped film surface. For this reason, if a cut is made in the center of the seal portion of each strip and cut in the direction of each strip, both side edges are formed of the seal portions from the strip-shaped film, and a plurality of tubular films having a flat shape are formed. Can be formed. And the manufacturing method of this invention uses this cylindrical film as the main body of a medical bag. According to such a manufacturing method of the present invention, a plurality of cylindrical films can be manufactured from an inflation film, and the main body of a medical bag can be formed from the cylindrical films. Therefore, compared with the case where the main body of the medical bag is manufactured from a thin cylindrical inflation film as in the conventional manufacturing method, the mass can be manufactured in a short time without being limited by the extrusion molding time. Further, in the manufacturing method of the present invention, since the inner wall serving as the main body of the bag is hardly exposed to the outside, fine particles and the like do not adhere to the inner wall.

In the manufacturing method according to the present invention, it is possible to print at a predetermined position on the strip-shaped film before cutting the seal portion of each strip. If printing is performed in advance at a predetermined position on the outer wall surface serving as the back body before the cutting at the stage of the strip film, it contributes to labor saving in a printing process. In the manufacturing method of the present invention, before cutting the seal portion of each of the strips, a heat seal portion is formed along a transverse direction of the strip film at a predetermined interval in a longitudinal direction of the strip film, and the heat seal portion is formed. Is the bottom seal part of the main body of the medical bag. If the seals at the portions other than the mouth of the bag, the side edges and the bottom are formed on the band-shaped film, the process of forming the bag is facilitated, and furthermore, contamination of the inner wall surface of the bag from the outside is further eliminated.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a medical bag manufacturing method according to an embodiment of the present invention. FIG. 1 is a schematic diagram showing a process of crushing an inflation film of a medical bag according to an embodiment into a belt shape and winding it around an original fabric. FIG. 2 is a process diagram of taking out a belt-like film from the raw material of the embodiment and performing heat sealing at a predetermined position. FIG. 3 is a process chart for performing printing on the strip film of the embodiment. FIG. 4 is a process diagram of cutting along the sealing portion of each strip of the strip-shaped film of the embodiment. FIG. 5 is a process diagram of cutting the back main body from the raw material of the cylindrical film of the embodiment for each unit. FIG. 6 is a plan view showing a cut portion of the tubular film of FIG. FIG.
It is the side view which attached the discharge port to the back main part of an example.

As shown in FIGS. 1 to 7, a method of manufacturing a medical bag 10 according to the present embodiment is as follows. A belt-like film 16 is taken out from a raw web 14 obtained by crushing a tubular inflation film 12 and winding it into a belt-like shape. At a predetermined position of the strip film 16, a plurality of strip seal portions 18 in which inner layers are heat-sealed with each other are provided. The strip seal portions 18 are arranged at regular intervals in the width direction of the strip film 16 along the longitudinal direction of the strip film 16. Are formed as a plurality of parallel strip seal portions 18, and a substantially central portion 18 </ b> A of each strip seal portion 18 is cut along the longitudinal direction to form a plurality of cylindrical films 2 from the strip film 16.
0 and the cylindrical film 20 is attached to the main body 1 of the medical bag.
Set to 0. The print 22 is applied to a predetermined position of the strip film 16 before the cutting of the strip seal portions 18. Before cutting the strip seal portions 18, a heat seal portion 24 is formed on the strip film 16 at a predetermined interval in the longitudinal direction along the transverse direction of the strip film 16, and the heat seal portion 24 is attached to a medical bag. The bottom seal portion 10A of the main body 10 of FIG.

The present embodiment will be described in more detail. As shown in FIG. 1, mixed resin pellets of low-density polyethylene and linear low-density polyethylene are supplied from a supply section 32 of an extruder 30. The resin is melted in the extruder 30 and the die 3
4 is extruded from a circular die. Air from an air introduction valve 36 attached to the die 34 is blown into the cylindrical film extruded from the circular die.
The outside of the cylindrical film is cooled by air from the air ring device 38 and formed on the blown film 12. The blown film 12 is formed by a guide plate 40.
And crushed by the nip roll 42, and the raw roll 1
4

As shown in FIG. 2, a belt-like film 16 is pulled out from the raw roll 14, and the belt-like film 16 is formed by a plurality of sealing portions 18 at regular intervals in the width direction by a heat sealing device 44. It is formed along the direction. Heat portions 48 are formed at regular intervals on the roll 46 of the heat sealing device 44, and the heat seal 48 forms the strip seal portions 18 with a width of 20 mm. A second heat sealing device 50 is also provided downstream of the heat sealing device 44, and the heat sealing portion 24 is formed in the device 50 in the transverse direction of the film 16 at regular intervals in the longitudinal direction of the film 16. The heat seal portion 24 becomes the bottom seal portion 10A of the back body 10.

As shown in FIG. 3, a printing device 51 is provided on the strip film 16, and the printing device 51 performs printing 22 on a predetermined position of the strip film 16. As shown in FIG. 4, a cutting roll 52 is provided on the belt-like film 16, and a blade 54 for thermal fusing is formed on the cutting roll 52 at a predetermined interval. The blade 54 abuts the substantially central portion 18A of the seal portion 18, and the strip film 16 is cut by the seal portion 18 of each strip. The band-shaped film 16 is cut by a seal portion 18 and divided into a plurality of tubular films 20. Each tubular film 20 is wound around each material roll 56.

As shown in FIG. 5, the tubular film 20 is pulled out from the raw roll 56 and cut into a predetermined length by a cutting machine 58, so that the back body 10 is formed. As shown in FIGS. 6 and 7, the tubular film 20 is cut at portions indicated by broken lines A, B, and C. The bottom of the back body 10 is formed by cutting the tubular film 20 along the broken line A. The heat seal portion 24 becomes the bottom seal portion 10A of the back body 10, and the cut portion of the strip seal portion 18 becomes the side peripheral seal portion 10B of the back body. By cutting the tubular film 20 along the broken line B, a suspension hole 10C of the back body 10 is formed in the bottom seal portion 10A. An attachment port is formed by cutting the tubular film 20 along a broken line C, and the discharge port 60 of the back body 10 is attached to the attachment port by thermal bonding.
The discharge port 60 is inserted between the tubular films 20 and thermally bonded. The discharge port 60 serves as a filling port for the infusion solution and a discharge port for infusion.

In the method for manufacturing a medical bag according to the present embodiment, the inner wall surface of the bag body 10 is not exposed to the outside in a series of steps. For this reason, even when a content liquid such as an infusion solution is stored, the mixing of fine particles and the like can be suppressed as much as possible. In addition, as in the conventional case, the production amount is determined depending on the ability of extrusion molding. However, in such a production method, the productivity can be freely changed by setting the width of the blown film 12. In addition, the printing process and the bottom seal applied to the medical bag 10 can be made extremely easy.

[0017]

As described above, in the method for manufacturing a medical bag according to the present invention, the tubular inflation film is crushed and the belt-shaped film is taken out from the raw material wound into a belt shape, and the predetermined film of the band-shaped film is taken out. A plurality of strip seals in which the inner layers are heat-sealed with each other are provided at positions, and the strip seals are formed parallel to each other along the longitudinal direction of the strip film at regular intervals in the width direction of the strip film. A substantially central portion of the strip seal portion is cut along the longitudinal direction to form a plurality of tubular films from the strip film, and the tubular film is used as a main body of the medical bag, so that the inner wall surface is highly clean. A large number of medical bags can be easily and easily manufactured.

[Brief description of the drawings]

FIG. 1 is a schematic view of a medical bag according to an embodiment until a blown film is crushed into a band and wound around an original fabric.

FIG. 2 is a process diagram of taking out a belt-like film from a raw material and heat sealing at a predetermined position according to the embodiment.

FIG. 3 is a process chart for printing on a strip film of the embodiment.

FIG. 4 is a process diagram of cutting along a seal portion of each strip of the strip-shaped film of the embodiment.

FIG. 5 is a process diagram of cutting the back body from the raw material of the cylindrical film of the embodiment into one unit.

FIG. 6 is a plan view showing a cut portion of the tubular film of FIG. 5;

FIG. 7 is a side view in which an outlet port is attached to the back body of the embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Medical back main body 10A Bottom seal part 10B Side peripheral seal part 10D Attachment opening 12 Inflation film 14 Raw film roll of band-shaped film 16 Band-shaped film 18-strip part 20 Cylindrical film 22 Printing 24 Heat-sealing part 60 Discharge port

Claims (3)

[Claims] 1. A belt-shaped inflation film is crushed, and the strip-shaped film is taken out from a raw material wound in a strip-like form. A plurality of strip-seal portions are formed at predetermined positions of the strip-shaped film by heat sealing the inner layers. The strip seals are formed parallel to each other along the longitudinal direction of the strip film at regular intervals in the width direction of the strip film, and cut substantially at the center of each strip seal section along the longitudinal direction. Forming a plurality of tubular films from the belt-shaped film, and using the tubular films as a main body of the medical bag. 2. The method for manufacturing a medical bag according to claim 1, wherein printing is performed on a predetermined position of the strip-shaped film before cutting each of the strip seal portions. 3. A heat seal portion is formed along the transverse direction of the strip film at a predetermined interval in the longitudinal direction of the strip film before cutting each of the strip seal portions, and the heat seal portion is formed by the medical treatment. The method for producing a medical bag according to claim 1 or 2, wherein the method is a bottom seal portion of a main body of the medical bag.