JPH0698922A - Infusion container and its molding method - Google Patents

Abstract

PURPOSE:To eliminate sealing defects and to enable the dosing of liquid drugs in a sterile state by integrally forming a container body consisting of a thermoplastic resin, a content taking out part and a content filling part by blow molding. CONSTITUTION:This infusion container 1 is formed of the container body 2, the content filling part 3 provided continuously and integrally therewith and the content taking out part 4 integrated with the separately molded content taking out member 7 adjacently to the filling part 3. A press bonded sheet-like part 5 is formed in the part facing the content filling part 3 and the content taking out part 4. An opening 6 for hanging is formed at the approximate center of the sheet-like part 5. The content taking out member 7 has a blind annular side wall 8 having the diameter decreasing with approaching downward via a level difference. An elastic member 11 is disposed on an annular level difference part 9 formed by the level difference above the side wall. A gas barrier type sheet-like material 13 is provided on this elastic member 11 via an annular body 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an infusion solution container and a method for molding the same, and more particularly, it is formed by blow molding a container body and at the same time integrating a member for taking out contents and a member for contents filler. Molding of an infusion container, and a container body, a member for taking out contents and a member for filling contents can be closely adhered and integrated by blow molding, and the sterility of the molded container can be maintained at a high level. Regarding the method.

[0002]

2. Description of the Related Art An infusion container has a liquid that requires sterility such as blood, drip, nutritional supplement, and cleaning liquid as contents, and a pipe is joined to a contents extraction member provided in the container. The thing is taken out. Conventionally, as an infusion container,
Two synthetic resin sheets are heat-welded at the top edge, side edge and bottom edge, and when the bottom edges are welded, a content filling member, an extraction member, etc. are sandwiched between the sheets to form a container body. It is known that they are integrated. As described above, the type of heating and welding the sheet by directly sandwiching the content take-out member between the sheets adheres so as to cover the surface of the content take-out introduction member and the like consisting of a cylindrical conduit from both sides. However, the welding is very difficult, and the occurrence of pinholes due to defective welding may cause problems such as liquid leakage and contents contamination. In addition, this type also has a problem that the sterility of the container cannot be sufficiently maintained because the molding tool is inserted into the container during molding.

In order to solve such a problem, the contents filling member, the take-out member and the like are previously fixed to a seat plate and integrally molded, and the seat plate portion is welded and fixed to a synthetic resin sheet. Also known is a liquid bag consisting of
-37645).

[0004]

However, this chemical solution bag can suppress the occurrence of pinholes, etc., as compared with a chemical solution bag in which a synthetic resin sheet is welded and fixed by directly sandwiching a content filling member and the like. Since the bottom has a step due to the thickness of the seat, it is still difficult to completely adhere the seat to the synthetic resin sheet by welding. Further, in this drug solution bag, since the content filling member and the like are fixed to the seat plate, the content filling member and the like are in a state of protruding from the container body, and are in use (when the drug solution bag is hung on a stand or the like). At the same time, it is difficult to hang down the pipes, etc., and it becomes a structure that is easy to hook.

Further, the contents taking-out member and the like used in these conventional infusion containers are penetrating members which can be penetrated by a needle or the like provided at the tip of a pipe or the like for taking out the contents, the container body and the chemical liquid introduction. It consists of a packing to keep the seal with the member and a separable outer cap.To apply a pipe for taking out the contents to this contents taking-out member, first remove the outer cap. Although the needle at the tip is inserted into a pierceable member, the penetrating member is already in contact with the atmosphere when the outer cap is removed and may be contaminated. There is a problem of not getting.

Further, there is a problem that it is difficult to sufficiently seal the space between the container body and the contents take-out member and the like only by the packing.

Therefore, an object of the present invention is to provide an infusion container in which a container body, a contents take-out member and a contents filler member are integrated by blow molding. Another object of the present invention is to provide a method for molding an infusion container, which does not require a troublesome welding work and can integrally mold the container body, the content extracting member and the like without generating pinholes. Still another object of the present invention is to provide a method for molding an infusion container, which can effectively prevent contamination of the container during molding. Still another object of the present invention is to provide an infusion container capable of easily installing a tube or the like at the time of use and being reusable even if the tube or the like is removed in a state where the contents remain, which can maintain sterility in the container. To provide a molding method capable of providing

[0008]

That is, according to the present invention, a container main body made of a thermoplastic resin, a content take-out portion and a content filling portion are integrated by blow molding. An infusion container is provided. Further, according to the present invention, the content take-out portion has a bottomed annular side wall whose diameter decreases through the step as it goes downward, an annular stepped portion formed by the step above the annular side wall, and the annular stepped portion. An upwardly projecting annular projection, an elastic member located on the annular step portion inside the annular projection, and an annular body for sealing the end of the elastic member together with the annular step portion and the annular projection, The infusion solution according to claim 1, which is made of a sheet-like material made of a gas barrier material covering the opening of the annular body, and the bottom of the bottomed annular side wall is formed thinner than the annular side wall. A container is provided.

Furthermore, according to the present invention, in a method of molding an infusion container comprising a container body made of a thermoplastic resin and a content take-out portion and a content filling portion, a container body made of a thermoplastic resin is formed. Infusion solution characterized in that the parison is integrated with the container body by blow molding the parison in a blow molding die in which a member for taking out or filling the contents is installed. A method of molding a container is provided.

[0010]

DETAILED DESCRIPTION OF THE INVENTION The infusion container of the present invention is characterized in that the container body, the content take-out portion and the content filling portion are integrally formed by blow molding. As a result, liquid leakage due to poor sealing that often occurs in a conventional infusion container in which the content extraction section and the content filling section are formed as separate members in the container body and they are integrated by means such as heat sealing An infusion container that can be prevented and that is excellent in airtightness and that can be administered in a sterile state is provided. Further, the method for molding an infusion container of the present invention is to insert the content take-out portion and the like into a blow mold in advance and blow-mold the container body. According to this method, the content take-out is taken out. Section and contents filling section are set at a predetermined place between synthetic resin sheets and heat-sealed to create pin holes or seal failure, as in the conventional molding method. The problem of being easy and the problem of being difficult to maintain sterility are completely solved.

That is, the parison is stretched by blow molding according to the mold without any gaps, and at the same time, the contents ejector and the contents filling section installed in advance in the mold are closely adhered with each other without gaps, thus the container body and the contents. The take-out member and the like can be integrated with the container body without causing a sealing failure.

In addition, since the blow molding die kept in a sterile state is stretched with sterile air and integrally molded, the sterility inside the container is much more reliable than that achieved by conventional heat bonding. It will be expensive.

In the method for molding an infusion container according to the present invention, the contents take-out member and the contents filling member are formed in advance, and the contents taking-out member and the contents filling section are inserted into the blow mold and blown. The parison for the container body is blow-molded in the mold, and the infusion container is manufactured by integrating the content ejection member with the container body, or the content filling part is blown directly from the parison as a part of the container body. It may be molded by.

In the present invention, first, the parison which forms the content take-out member and the container body is preformed. The contents take-out member is not limited to this, but the shell part is formed by injection molding of a thermoplastic resin, the elastic member is fitted into the shell part, and then the laminated body of the thermoplastic resin and the metal foil is formed so as to cover the opening. Heat seal and mold. In addition, the parison that becomes the container body has an opening that can fit the content extraction member exactly,
A bottomed parison having a fluid blowing opening is molded by injection molding. Next, fit the contents extraction member to this parison in the blow mold, blow high-pressure sterile fluid from the fluid blowing opening to extend it, and then crimp the fluid blowing opening and the surroundings to form the container shape. Then, after cooling, it is taken out from the mold to form a completely sealed infusion container.

In FIG. 1, which shows an example of a container molded according to the present invention as a front view, a top view, a bottom view and a side view, an infusion container generally designated by 1 is a container body 2 and a continuous body integrated with the container body 2. The content filling section 3 provided in the above is further provided, and further adjacent to the content filling section 3, a content take-out section 4 in which a separately-formed content take-out member is integrated is provided. A crimped sheet-like portion 5 is formed in a portion facing the content filling portion 3 and the content unloading portion 4, and a hanging opening 6 is formed substantially in the center of the sheet upper portion 5. .

Further, in the present invention, it is possible to obtain the excellent sealing property and sterility as described above by using any conventionally known contents taking-out member, but the contents taking-out member as shown in FIG. 2 is used. If used, a further excellent effect can be obtained. In FIG. 2, the content extracting member generally designated by 7 is a bottomed annular side wall 8 whose diameter becomes smaller through the step toward the lower side, an annular step portion 9 formed by the step above the annular side wall 8, and an annular shape. An upwardly projecting annular projection 10 provided on the step portion 9, an elastic member 11 located on the annular step portion inside the annular projection 10, and an end portion of the elastic member 11 are formed by the annular step portion 9 and the annular projection 10. It also comprises a ring-shaped body 12 for hermetically sealing, and a sheet-like material 13 made of a gas barrier material covering the opening of the ring-shaped body 12. Further, although the bottom portion 14 is formed integrally with the annular side wall 8,
It is formed thinner than the annular side wall 8 so that it can be easily perforated with a needle or the like. The tip ends of the ring-shaped body 12 and the ring-shaped projection 10 are heat-sealed, and these are integrated to fix the end of the elastic member 11.

In this content take-out member, when actually taking out the content, first the sheet-like material 13 is peeled off, and a needle provided at the tip of a tube or the like is pierced into the elastic member to penetrate the bottom 14 as it is. , The tip of the pipe reaches the contents and is taken out. Therefore, since the space 15 defined by the elastic member 11 and the bottom portion 14 does not come into contact with the outside air, it becomes possible to maintain the sterility of the contents with considerable reliability even when the contents are taken out. Of. Moreover, since the elastic member maintains the space 15 in a state of being shielded from the outside air even after the tube is pulled out, it is possible to temporarily stop the taking out of the contents and take out the contents again.

In the present invention, as the thermoplastic resin forming the container body, low-, medium- or high-density polyolefin resins such as polyethylene, polypropylene, ethylene-propylene copolymer and polybutene-1 are preferably used. You can The parison is a conventionally known extrusion molding,
It can be molded by injection molding or the like, and the conditions for blow molding differ depending on the resin used and the like, but in general, a molding temperature of 160 to 260 ° C. and a blow ratio of 1.1 to 5 times are preferable.

The content take-out member is also preferably made of the same thermoplastic resin as the container body. A blended product of isoprene rubber and butadiene rubber or the like can be preferably used as the elastic member used for the content extracting member. Depending on the type of elastic member used, a score may be provided in order to facilitate penetration of a needle or the like. Further, the gas barrier substrate of the content extraction member may be a metal foil or a gas barrier resin alone, but by using a laminate of these and a thermoplastic resin such as polyolefin, a special adhesive is used. Instead, it can be adhered by heat sealing.

[0020]

EFFECT OF THE INVENTION The infusion container according to the first invention of the present application is often used in conventional infusion containers because the container body, the content take-out portion and the content filling portion are integrally formed by blow molding. It is possible to prevent liquid leakage due to a defective seal that has occurred, and it is possible to administer in aseptic state with excellent airtightness. Furthermore, by using a specific contents take-out member, it is possible to easily install tubes and the like during use, and retain the sterility inside the container that can be reused even if the tubes are removed while the contents remain. An infusion container that can be provided can be provided. The second invention of the present application eliminates the need for troublesome welding work, does not cause pinholes in the container body, the chemical liquid introducing member, and the like, that is, does not cause a sealing failure, and moreover, the container body during molding. It is possible to provide a method for molding an infusion container, which can effectively prevent such contamination as described above.

[Brief description of drawings]

FIG. 1 is a diagram showing an example of an infusion container of the present invention.

FIG. 2 is a cross-sectional view showing an example of a content takeout member that can be used in the infusion container of the present invention.

[Explanation of sign]

 DESCRIPTION OF SYMBOLS 1 Infusion container 2 Container main body 3 Content filling part 4 Content extraction part 8 Annular side wall 9 Annular step part 10 Annular protrusion 11 Elastic member 12 Annular body 13 Sheet-like material 14 Thin-walled part

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location B65D 83/00 // B29L 22:00 4F B65D 83/00 G

Claims (3)

[Claims] 1. An infusion solution container, characterized in that a container body made of a thermoplastic resin, a content take-out portion and a content filling portion are integrated by blow molding. 2. The content take-out portion is provided on the bottomed annular side wall whose diameter decreases through the step as it goes downward, the annular stepped portion formed by the step above the annular side wall, and the annular stepped portion. An upwardly projecting annular projection, an elastic member located on the annular step portion inside the annular projection, and an annular body for sealing the end of the elastic member together with the annular step portion and the annular projection, the annular body 2. The infusion container according to claim 1, which is made of a sheet-like material made of a gas barrier material that covers the opening of the body, and the bottom of the bottomed annular side wall is formed thinner than the annular side wall. 3. A container body made of a thermoplastic resin, and a method for molding an infusion container comprising a contents take-out section and a contents filling section, wherein a parison for forming the container body made of a thermoplastic resin is taken out from the contents. Alternatively, a method for molding an infusion container is characterized in that the member for taking out or filling the contents is integrated with the container body by performing blow molding in a blow molding die in which a member for filling is installed.