JPH056992Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a plastic container for infusion containing infusions for intravenous injection, such as blood and plasma substitutes.

BACKGROUND ART Conventionally, plastic containers for infusions of this type have been widely used because of their advantages such as not breaking even if dropped and being lightweight. In addition, an infusion container that allows the natural dripping of infusion to be uniform and prevents residual liquid from occurring, and also improves the appearance by eliminating irregular deformation of the container during infusion, is disclosed in Japanese Patent Application Laid-Open No. 62-139659. Those described in official gazettes are known.

Problems that the invention attempts to solve By the way, what is stated in the above publication is:
Irregular deformation of the container during infusion is prevented by making the cross section of the body of the container approximately rectangular and increasing the wall thickness on the short sides. When the container is filled with an infusion solution and the container is held upright, the body protrudes, and the heating of the container during steam sterilization increases the internal pressure, which promotes protruding deformation of the body. When labeling, there is a drawback that radial wrinkles occur on the label due to the protruding body, making the label difficult to read. Furthermore, when dripping an infusion solution by hanging the container, the wrinkles in the label impair the flexibility of the container, and there is a drawback that the infusion solution cannot be dripped completely naturally.

Therefore, in order to solve the problems of the conventional ones, the present invention was developed by blow molding to make the wide side of the flat body part flat. By forming a gentle concave surface that tapers toward the center over almost the entire surface of the container, it is possible to prevent the label from being wrinkled on the wide side of the body after filling the container with infusion and performing steam sterilization. It can be easily applied without causing any wrinkles, and it also eliminates the loss of flexibility of the body caused by wrinkles in the label attached to the wide side of the body during infusion.
The object of the present invention is to provide a plastic container for infusions that allows complete natural dripping of infusions.

Means for Solving the Problems The present invention has been constructed as follows to achieve its purpose.

That is, the configuration has a hanging piece at the bottom,
In a blow-molded plastic infusion container that is hung in an inverted manner from this hanging piece so that the infusion drips naturally, the body of the container is formed into a flat cylindrical shape by blow molding, and the body of this flat cylindrical shape is narrowed. This plastic container for infusion has a flat width surface and a substantially entire wide surface having a gentle concave shape concave inward toward the center.

Function: In the plastic container for infusion according to the present invention, the narrow side of the flat cylindrical body is formed into a flat shape, and the wide side extends over almost the entire surface and is gradually concave inward toward the center. Because it is formed in a concave shape, when the internal pressure increases when the container is filled with infusion solution and steam sterilized, the narrow surface of the body, which is narrow and flat, will not deform; The wide surface of the body between the two is a gently concave surface that extends over almost the entire surface, and gently bulges from the center toward the periphery, and the wide surface of the body deforms into a planar shape. Therefore, the label attached to the wide side of the body does not wrinkle after steam sterilization. In addition, the wide side of the body is formed into a gentle concave shape that is concave inward toward the center over almost the entire surface.
Since it deforms into a concave shape while maintaining its flat shape, the label does not wrinkle during infusion, and the flexibility of the body remains intact.

Example An embodiment of the present invention will be described with reference to the drawings.

Reference numeral 1 denotes a plastic container for infusion, and the plastic container 1 for infusion is constructed by blow molding relatively flexible thermoplastic plastic. That is, reference numeral 2 denotes the body part, and a mouth part 4 is formed at the center upper end of an upper shoulder part 3 of the body part 2, and the mouth part 4 is sealed with a stopper 5. Further, a hanging piece 7 is integrally formed on the bottom part 6 of the body part 2, and a hole 8 is formed in the hanging piece 7 for inserting a hanging rod or for hanging a finger. The body portion 2 has a flat cylindrical shape with a substantially rectangular cross section, and its narrow surfaces 9 are formed in a planar shape perpendicular to the direction from the upper shoulder portion 3 to the bottom portion 6. Further, the wide surfaces 10, 10 of the body portion 2 are formed into gentle concave surfaces that are concave inward toward the center portion over substantially the entire surface thereof. Labels 11, 11 are affixed to the wide sides 10, 10 of the trunk 2. 12 is an infusion needle, and 13 is a hanging rod of the stand.

The relatively flexible thermoplastic plastic that constitutes the plastic container 1 for infusion has a flexural modulus (JISK7203) of 9000 Kg/cm ² or less,
Plastics with relatively high transparency, such as low-density polyethylene, ethylene-propylene random copolymer, ethylene-propylene block copolymer, ethylene-vinyl acetate copolymer, etc. produced by low-pressure or high-pressure methods, are especially heat-resistant. Those with high properties are preferable.

The plastic container 1 for infusion liquid constructed as described above is filled with an infusion liquid in an upright position, and after being filled, it is subjected to steam sterilization. After this sterilization process, the wide surfaces 10, 10 of the body 2 are placed in this erect state.
Labels 11, 11 are pasted on both sides (or one side). Also, during infusion, as shown in Figure 6,
The stand is used by inserting the hanging piece 7 into the hanging rod 13 of the stand and hanging it with the bottom part 6 facing upward.

During the above-mentioned steam sterilization process, the internal pressure of the plastic container 1 increases due to the temperature rise due to heating, but since the wide surfaces 10, 10 of the body 2 are formed into gentle concave surfaces, when the internal pressure increases, the wide width of the body 2 increases. Side 1
Nos. 0 and 10 swell into a flat shape, and wrinkles do not occur when labels 11 and 11 are attached to the surface after steam sterilization. Furthermore, even if the interior of the plastic container 1 becomes negative pressure during infusion as the internal liquid decreases, the wide surfaces 10, 10 of the body 2 will gently maintain their planar shape and dent according to the concave surface. Therefore, the label does not wrinkle and the flexibility of the plastic container 1 is not impaired. Therefore, the infusion solution in the plastic container 1 can completely drip naturally.

Effects of the invention According to the invention, the wide side of the flat body is made by blow molding, and when the container is filled with infusion solution and steam sterilized, the internal pressure increases due to heating, almost the entire surface becomes flat. By forming a gently concave surface that tapers toward the center, after filling the container with infusion solution and performing steam sterilization,
Labels can be easily applied to the wide side of the body without wrinkles, and the flexibility of the body can be easily applied to the wide side of the body, which would otherwise occur during infusion. A plastic container for infusion can be obtained which eliminates attenuation and allows complete natural dripping of infusion.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is an overall perspective view of a plastic container for infusion, FIG. 2 is a perspective view of the empty container, and FIG. 3 is a front view of the container.
FIG. 4 is a side view of the same as above, FIG. 5 is a side view of the container with a label pasted on it, and FIG. 6 is a partially cutaway side view of the container showing the state during infusion. 1... Plastic container for infusion, 2... Its body, 4... Mouth, 6... Bottom, 7... Hanging piece,
9,9...Narrow width surface, 10,10...Wide width surface, 1
1,11...Label.

Claims (1)

[Scope of utility model registration request] In a blow-molded plastic container for infusions that has a hanging piece at the bottom and allows the infusion to naturally drip by hanging upside down from this hanging piece, the body of the container is formed into a flat cylindrical shape by blow molding. A plastic container for infusions, characterized in that the narrow side of the flat cylindrical body is flat, and substantially the entire wide side is formed into a gentle concave shape that is concave inward toward the center.