JPH08238298A - Connector of plastic container - Google Patents

Abstract

PURPOSE: To easily attach and fix the connector provided to the mouth part of a container for a chemical soln. or liquid food to connect a joint pipe to a container made of a polyolefin resin easy to incinerate after use. CONSTITUTION: In a connector 1 having an insertion part 2 having a bent cutting part 5 provided to its base part, a welding part 3 provided to its central part and a joint pipe connection part 4 provided to its leading end part and constituted so as to be fixed to a plastic container, the connector is formed from a polycarbonate resin and a polyolefin resin layer 6 is formed to the uneven part 3' formed to the outer peripheral surface of the welding part 3 to certainly and easily attach and fix a container made of a polyolefin resin to the welding part 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a connector which is attached to the mouth of a plastic container (bag) filled with a liquid medicine, liquid food or the like and discharges the filled material to the outside.

[0002]

2. Description of the Related Art A container mounted on the mouth of a conventional infusion plastic container or liquid food plastic container is used to transfer and discharge the filling to the outside. A vinyl chloride container is used and the connector is made of polycarbonate. Resin is used, but the vinyl chloride container generates toxic chlorine gas when incinerated after use, which is harmful to environmental hygiene, so use a container of polyolefin resin that does not generate toxic gas when incinerated. The current situation is changing.

[0003]

However, since the resin connector made of polycarbonate cannot be heat-welded to the polyolefin resin container, it must be attached by an adhesive or screwed in. When heat sterilized or stored, it elutes into the plastic container and adversely affects the filling, and the latter has problems such as the labor and cost of mounting on the plastic container and the possibility of falling off if not securely mounted. . In view of these circumstances, an object of the present invention is to provide a connector of a plastic container in which the connector can be reliably and easily attached to a container made of polyolefin resin.

[0004]

In order to achieve the above-mentioned object, the present invention uses a polycarbonate resin consisting of an insertion part having a bent shredded part in the base part, a welded part in the central part, and a joint pipe connecting part in the tip part. In the connector of the formed substantially tubular plastic container, characterized in that at least the outer peripheral portion of the welded portion is formed with a polyolefin resin layer,
In particular, when the outer peripheral surface of the welded portion is formed to have irregularities to form the polyolefin resin layer, both can be integrally bonded, which is preferable.

[0005]

According to the present invention, a container made of a polyolefin resin can be heat-welded to a polyolefin resin layer formed on the outer circumference of a welded portion of a connector made of a polycarbonate resin, so that a toxic chlorine gas is not generated during incineration of a plastic container connector. It can be easily and surely attached to the resin container to facilitate the incineration process after using the container.

[0006]

Embodiments of the present invention will now be described with reference to the drawings.
Connector 1 made of polycarbonate resin,
In a substantially tubular shape, the insertion portion 2 located in the container (bag) A at the base portion, the welding portion 3 attached to the mouth portion of the container A at the central portion, and the connecting pipe connecting portion 4 protruding to the outside of the container A communicate with each other. The end portion of the insertion portion 2 is hermetically sealed, a small-diameter bent division portion 5 is provided on the welding portion 3 side, and the joint pipe connecting portion 4 is an outer cylinder 4'and an inner cylinder. 4 ″, and a connecting pipe such as a vinyl chloride pipe is fitted on the outer side of the inner cylinder 4 ″ so that the infusion solution, liquid food, etc. in the plastic container A can be transferred to the outside. The outer peripheral surface of 3 is formed in a concavo-convex portion 3 ', and a polyolefin resin layer 6 such as polyethylene or polypropylene is integrally formed in the concavo-convex portion 3'by insert molding.

Since the embodiment of the present invention is constructed as described above, the welded portion 3 of the connector 1 is heat-welded and fixed to the mouth portion of the polyolefin resin layer container (bag) A, and in use, a connecting pipe is used. After the joint pipe B of vinyl chloride or the like is attached to the inner cylinder 4 ″ of the connecting portion 4 by blocking welding at the same time as the conventional case, the bending or splitting portion 5 of the insertion portion 2 is bent to infuse or flow the liquid in the container A. The food or the like is transferred to the outside by the connecting pipe B.
Although the polyolefin resin layer is provided only on the welded portion 3 in the above-mentioned embodiment, it may be provided on the insertion portion 2 if necessary.

In the above embodiment, the chemicals and liquid food in the polyolefin resin container are transferred to the outside of the container through the connector. For example, urine of a sick patient is transferred to the polyolefin resin through the connecting pipe and the connector. It can also be used when collecting in a container.

[0009]

Industrial Applicability According to the present invention, a polyolefin resin layer is integrally formed on the outer peripheral surface of a welded portion of a polycarbonate connector to be attached to a polyolefin resin container (bag), and the connector is attached to the mouth portion of the polyolefin resin container. Since it can be fixed, a connector made of vinyl chloride can easily and securely be attached to the mouth of a polyolefin resin container that does not generate toxic gas during incineration after use, and a flexible and easy-to-use PVC pipe joint pipe is also available. In the same manner as above, it can be attached by blocking welding to the joint portion of the polycarbonate resin.

In particular, by forming the polyolefin resin layer on the uneven portion of the outer peripheral surface of the welded portion, the polyolefin resin layer can be firmly and surely integrally bonded to the polycarbonate connector.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view of the present invention.

[Explanation of symbols]

 1 Connector 2 Insertion part 3 Welding part 3'Uneven part 4 Joint pipe connection part 5 Bending shredded part 6 Polyolefin resin layer

Claims (2)

[Claims] 1. A connector of a substantially tubular plastic container formed of a polycarbonate resin, which comprises an insertion part having a bent cut-off part at the base part, a welded part at the center part, and a joint pipe connection part at the tip part, at least the welded part. A connector for a plastic container, wherein a polyolefin resin layer is formed on the outer peripheral portion of the connector. 2. The connector for a plastic container according to claim 1, wherein a polyolefin resin layer is provided on a welded portion having an uneven outer peripheral surface.