KR20110027892A - Overwrap pouch for medical intravenous bag - Google Patents

Abstract

PURPOSE: An overwrap pouch for medical intravenous bag is provided to prevent problems on the hurt of hands caused by carelessness when a user uses the pouch by affording flexibility and softness. CONSTITUTION: An overwrap pouch for medical intravenous bag includes a multilayered film. A bottom layer(10) contacting the medical intravenous bag and a top layer(14) exposed to the outside are made of polypropylene-based resin layer. A barrier layer(12) is interposed between the bottom layer and the top layer, wherein the barrier layer is made of ethylene-vinyl alcohol(EVOH). The top layer and the barrier layer, and the bottom layer and the barrier layer are bonded using bonding layers(11,13) as a medium.

Description

Secondary pouch for medical sap bag {OVERWRAP POUCH FOR MEDICAL INTRAVENOUS BAG}

The present invention relates to a medical sap bag secondary pouch, and more particularly, to a sap bag secondary pouch having excellent heat resistance, transparency, flexibility, impact resistance, heat adhesiveness and barrier properties.

Conventional medical fluid container is made of a glass bottle, there is an inconvenience that must be periodically regulated the flow rate due to the generation of a vacuum space as the contents are reduced and fragile in use. In consideration of these problems, PVC-based sap containers have emerged. However, in the case of PVC-based fluid containers, endocrine disrupting substances (environmental hormones) are generated, and a large amount of dioxins are generated when incinerated, so the need for developing non-PVC fluid containers has emerged.

Conventional non-PVC-based sap containers have been developed as polyolefin-based multi-layer containers, but in most cases, due to poor heat resistance during sterilization, whitening phenomenon (lower transparency) occurs, and due to lack of flexibility and formability problems, they are commercialized. Exposes many limitations. Thus, a secondary pouch (overwrap pouch) was required for high temperature sterilization (120-125 ° C., about 20 minutes).

The present invention is to solve the problems appearing in the prior art, one purpose is to enable high-temperature sterilization of non-PVC-based medical sap bag, transparency, flexibility, impact resistance, heat adhesiveness and barrier properties The present invention relates to a non-PVC-based medical sap bag secondary pouch having improved characteristics.

In order to achieve the above object, according to one embodiment of the present invention is provided a secondary pouch containing a sealed sap bag for storage. The secondary pouch is composed of a film consisting of a plurality of layers, the bottom layer in contact with the medical sap bag of the plurality of layers, the top layer exposed to the outside is made of a polypropylene resin layer, the bottom layer and the top A barrier layer made of ethylene vinyl alcohol (EVOH) is interposed between the layers, and the top layer, the barrier layer, and the bottom layer and the barrier layer are each bonded to each other via an adhesive layer therebetween.

According to another embodiment of the present invention there is provided a secondary pouch for storing and storing a medical sap bag, the secondary pouch is composed of a film consisting of a plurality of layers, in contact with the medical sap bag of the plurality of layers The bottom layer and the top layer exposed to the outside include a polypropylene-based resin layer, and a barrier layer made of ethylene vinyl alcohol (EVOH) is interposed between the bottom layer and the top layer, and the bottom layer is formed of the same material as the bottom layer. An additional layer is provided, wherein the additional layer and the barrier layer are bonded to each other via an adhesive layer therebetween, and the polypropylene-based resin layer of the top layer includes an adhesive, thereby connecting the top layer and the barrier layer to each other. It is characterized by bonding.

According to another embodiment of the present invention, there is provided a secondary pouch for sealing and storing a medical sap bag, wherein the secondary pouch is composed of a plurality of layers of film and is exposed to the outside of the plurality of layers. The layer is made of a polypropylene resin layer mixed with an adhesive, a barrier layer made of ethylene vinyl alcohol (EVOH) is interposed between the bottom layer and the top layer, the bottom layer of the plurality of layers in contact with the medical sap bag is It consists of three layers, a first layer in direct contact with the sap bag, a third layer in contact with the barrier layer, and a second layer therebetween, wherein the first layer and the second layer are composed of a polypropylene resin layer. The third layer is made of a polypropylene-based hydrated layer mixed with an adhesive, and the adhesive contained in the top layer and the adhesive contained in the third layer And wherein the top layer and the third layer are bonded to the barrier layer.

In a preferred embodiment, it may further comprise a PET or Nylon layer laminated on the top layer by a dry lamination method.

The secondary pouch according to the present invention is manufactured by a blown method to provide improved flexibility and softness, thereby preventing a user from injuring his hand or the like by inadvertent use of the pouch. In addition, the secondary pouch according to the present invention has a strong barrier against elongation and cracks due to heat resistance and vacuum packaging that can withstand high temperature sterilization treatment, and provides an excellent effect of impact resistance, transparency and heat adhesion.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, a detailed description of the configuration already well known in the art with respect to the sap bag production is omitted. Even if this description is omitted, those skilled in the art will be able to easily understand the features of the present invention through the following description.

Secondary pouch according to the present invention was prepared in the secondary pouch at 200 ~ 230 ℃ using a bottom-up 5-Layer Blown film machine. The method of manufacturing the film constituting the secondary pouch includes a casting method of forming a cold roll through T-Die, an inflation method of forming a water cooling through a circular die, and the like, and a method of dry lamination of each film. According to the inventor's observation, when the inflation method is applied, the transparency and flexibility of the film produced is superior to that of the T-Die method or the Lamination method, and it is wound in two layers and thus is hygienic because there is no possibility of mixing foreign substances in the inner layer. There are advantages such as work convenience. Therefore, in the present invention, the secondary pouch is manufactured using the water-cooled inflation method. In addition, since the bag is manufactured by molding into a tube, only upper and lower portions of the bag need to be sealed by post processing. Therefore, when manufacturing a bag by molding into a film, the post-processing cost can be reduced compared to sealing the four sides of the bag.

A film cross-sectional structure of a secondary pouch for medical sap bag manufactured through the above process is shown in FIG. 1. As shown in Figure 1, the film of the secondary pouch according to the present invention is composed of a plurality of layers (10, 11, 12, 13, 14).

The present inventors have a polypropylene-based (PP) resin layer in which a portion of a secondary pouch is exposed, that is, an upper surface layer 14 that is an outer surface layer exposed to the outside, and a bottom layer 10 that is an inner surface layer of a secondary pouch in which an infusion bag is contained. It was configured to give heat resistance suitable for sterilization conditions. On the other hand, in relation to the properties that the secondary pouch should have, that is, moisture and oxygen barrier properties, an ethylene vinyl alcohol (EVOH) resin is interposed between the top layer and the bottom layer as the barrier layer 12, and then the adhesive layers ( 11, 13) (eg Tie) to complete the present invention.

According to the inventor's observation, the film is excellent in flexibility, and even if wrinkles occur in the film, the barrier property is not deteriorated. In addition, since the film was soft, there was no problem of injuring the hand in the process of washing the pouch when the user used the secondary pouch. That is, after the medical sap bag is put in the secondary pouch and sealed, it is stored refrigerated. In this case, the existing secondary pouch becomes hard and causes problems such as burdening hands or injuring the hand in the process of washing the secondary pouch. However, the secondary pouch according to the present invention did not cause this problem. In addition, the inventors put the sap bag in the secondary pouch and sealed it, and then performed sterilization treatment. Unlike conventional secondary pouches, the secondary pouches of the present invention did not show any whitening phenomenon, that is, a drop in transparency even after sterilization treatment, and did not smell.

On the other hand, when looking at the film cross-sectional structure of FIG. 1, an adhesive layer comprises a film as one layer. The adhesive layers 11 and 13 occupy a substantial part of the cost of the entire film. Therefore, there is a need for a constitution that exhibits the above effects without using as much of the adhesive as possible. In view of this problem, the present inventors have also developed a film structure as shown in FIGS. 2 and 3.

First, as shown in FIG. 2, the adhesive layer 22 is composed of only one layer, and the adhesive is mixed with PP to form the top layer 24. The other configuration is the same as that shown in FIG. However, if the thickness of the entire film is too thin, there may be a problem in the heat resistance during sterilization treatment, the bottom layer is composed of two layers (20, 21) using polypropylene, the thickness of the entire film is approximately shown in FIG. It was made the same as the thickness of the shown film. According to the film structure shown in FIG. 2, unlike the one shown in FIG. 1, only one adhesive layer 22 is provided, and an adhesive for bonding the barrier layer 22 and the top layer 24 to each other is formed as a separate layer. Rather, it was mixed with the polypropylene constituting the top layer 24 to reduce the amount of adhesive as a whole. The secondary pouch made of the film thus constructed was tested in the same manner as described above, but the same effect as that shown in FIG. 1 was obtained.

According to the embodiment shown in FIG. 2, the adhesive layer 22 still consists of one layer. According to a more preferred embodiment of the present invention, it was possible to further reduce the manufacturing cost of the film, except for the adhesive layer composed of such independent layers, the structure is shown in FIG.

According to the embodiment shown in FIG. 3, unlike those shown in FIGS. 1 and 2, there is no separate independent adhesive layer, and the adhesive is mixed with polypropylene, so that the top layer 34 and the bottom layer 32 are respectively. It was configured to be able to be bonded to the barrier layer 33 therebetween, in consideration of the thickness of the entire film, an additional two bottom layer (31, 30) was added below the bottom layer (32). The performance of the secondary pouch made of a film constructed as shown in FIG. 3 was tested in the same manner as described above, but the same effect as that shown in FIG. 1 was obtained.

On the other hand, according to another embodiment of the present invention, in order to further increase the heat resistance, PET or Nylon may be used on the top layer (14, 24, 34) in a dry lamination method. In this case, the heat resistance can be further increased, so that the original characteristics can be prevented from being lost even at a higher temperature sterilization treatment.

As mentioned above, although this invention was demonstrated with reference to the preferred embodiment, it is to be understood that this invention is not limited to the above-mentioned embodiment. That is, the present invention can be variously modified and modified within the scope of the following claims, and all of them fall within the scope of the present invention. Accordingly, the invention is limited only by the claims and the equivalents thereof.

1 is a view showing a cross-sectional structure of the film constituting the secondary pouch according to an embodiment of the present invention.

2 is a view showing a cross-sectional structure of the film constituting the secondary pouch according to a preferred embodiment of the present invention.

3 is a view showing a cross-sectional structure of the film constituting the secondary pouch according to a preferred embodiment of the present invention.

Claims (4)

In the secondary pouch containing the medical sap bag sealed and stored, The secondary pouch is composed of a film composed of a plurality of layers, The bottom layer in contact with the medical sap bag of the plurality of layers and the top layer exposed to the outside is made of a polypropylene resin layer, A barrier layer made of ethylene vinyl alcohol (EVOH) is interposed between the bottom layer and the top layer, and the top layer and the barrier layer, and the bottom layer and the barrier layer are respectively bonded to each other via an adhesive layer therebetween. Secondary pouch. In the secondary pouch containing the medical sap bag sealed and stored, The secondary pouch is composed of a film composed of a plurality of layers, The bottom layer in contact with the medical sap bag of the plurality of layers and the top layer exposed to the outside comprises a polypropylene resin layer, A barrier layer made of ethylene vinyl alcohol (EVOH) is interposed between the bottom layer and the top layer, and an additional layer of the same material as the bottom layer is provided on the bottom layer, wherein the additional layer and the barrier layer form an adhesive layer therebetween. A secondary pouch bonded to each other via a medium, wherein an adhesive is included in the polypropylene resin layer of the upper layer, and the upper layer and the barrier layer are bonded to each other. In the secondary pouch containing the medical sap bag sealed and stored, The secondary pouch is composed of a film composed of a plurality of layers, The top layer exposed to the outside of the plurality of layers is made of a polypropylene resin layer mixed with an adhesive, A barrier layer made of ethylene vinyl alcohol (EVOH) is interposed between the bottom layer and the top layer, The bottom layer in contact with the medical fluid bag of the plurality of layers is composed of three layers, a first layer in direct contact with the fluid bag, a third layer in contact with the barrier layer, and a second layer therebetween. The first layer and the second layer is composed of a polypropylene-based resin layer, the third layer is made of a polypropylene-based soluble layer mixed with an adhesive, And a top layer and a third layer are bonded to the barrier layer through the adhesive included in the top layer and the adhesive included in the third layer. The secondary pouch according to any one of claims 1 to 3, further comprising a PET or Nylon layer laminated on the top layer by a dry lamination method.

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