JPS6364A - Extrusion tube with blank cap - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] The present invention relates to the improvement of an extruded tube with a lid, and aims to reduce product costs by preventing deterioration of the contents and streamlining tube manufacturing. .

In the field of conventionally known impact tubes, extruded tubes with so-called lids whose extrusion ports are closed are already known.

Subsequently, the development of plastic tubes and laminate tubes progressed from the perspective of ensuring the tube's resilience, and attempts were made to cover the extrusion ports of these tubes with blind lids in order to protect the contents and maintain virginity. . However, in the field of plastic or laminate tubes, there are various problems in making the blind lids from the same material as the containers.

In other words, in the former case, although it is possible to form a blind lid that is integrated with the container by blow molding, etc., the materials that can be used must be specified due to molding restrictions, and the barrier properties of both the container and the lid are severely lacking, and at best virgin properties can be obtained. In the latter case, the barrier properties of the tube are sufficient, but due to manufacturing limitations, with materials with such barrier properties, such as laminated materials containing aluminum foil, it is difficult to cover the blind lid. It was impossible to perform integral molding including the For this reason, in the latter case, in order to prepare the blind lid material made of cut material separately from the tube body and apply it to the extrusion port,
This necessitated a separate process and preparation of materials from the process of forming the container or tube itself.

Under such circumstances, the present invention has carried out various studies with the aim of reducing costs and perfecting the integrity of heat sealing, particularly regarding the attachment of blind lids in the field of laminate tubes.

Normally, in the manufacturing of laminated tubes, polypropylene resin, polyamide resin, urea resin, etc. are used in the tube manufacturing process to maintain serial numbering so that outside air does not affect the contents through the shoulder part.

Barrier materials are punched out from a laminated material of one or more materials having fragrance retention properties and impermeability to oxygen and the like, such as aluminum foil, and are fused together.

This barrier material is shaped like a donut with a circular cutout in the center, and all the scraps in the center have been discarded.

However, the diameter of this barrier material is not only large enough to cover the mouth of the tube, but the material is also selected from a material that inherently retains fragrance and is impermeable to oxygen, etc. Therefore, it goes without saying that it is the most preferable material for shielding the mouth of the tube, and also has good heat-sealability to the mouth of the tube.

Therefore, the inventor of the present invention intended to use the scraps of the barrier material produced in the manufacturing process of the above-mentioned laminate tube as a blind lid for the mouth. We succeeded in reducing the manufacturing cost of laminated tubes by reducing the number of steps and reducing the number of man-hours.

That is, to explain based on the embodiment shown in the drawings, 1 is a collapsible laminate tube body, 2 is a shoulder connected to one end of the tube body L, 3 is an extrusion port, and 4 is a tube provided on the outer peripheral wall surface of the extrusion port 3. 5 is a barrier material fused to the outer side of the shoulder 2, and 6 is a blind lid that seals the opening of the extrusion port 3.

The barrier material 2 to be fused to the shoulder 2 is a material sheet made of a material that has excellent fragrance retention and impermeability to oxygen, etc., and a circular hole is punched out of it to avoid the extrusion opening in the center. After forming a barrier material having a donut shape as a whole, it is further drawn into a shape that substantially overlaps with the shoulder 2 using a drawing die,
This is integrally fused to the outer peripheral surface of the shoulder 2 by heat sealing when the tube body 1 and the barrier material are combined.

In the present invention, during the process of molding the barrier material 5, the blank waste generated when punching out a hole in the center to avoid contact with the extrusion port 3 is used as the blank M6. Continue to extrusion port 3 (
Although it is possible to use it as the lid 6, in this embodiment, the barrier lid 6 is particularly used in order to facilitate positioning, prevent molding wrinkles, and furthermore prevent the R1 blind lid from falling off or shifting its position. Make the scrap of the material match the opening shape of the tube extrusion port 3 (emboss it into a dish shape, fit it with the central convex part facing inward of the extrusion port 3, and then heat-seal or high-frequency seal it. It is sealed in one piece.

At this time, if you seal the Nukikasu with the layer side such as aluminum foil facing up, the adhesion between the resin layer side on the back side and the resin at the extrusion port will be good, and when the blind lid is opened, the metal layer will be on the front side. This makes it easy to open the lid, and even after opening the cap with the protruding point, there is no possibility that the opened fragments will turn outward when the contents are extruded.

As described above, the present invention allows the material to be blinded as it is, since the scraps inevitably generated during the molding process of the barrier material have good fragrance retention properties and impermeability to oxygen etc. for the contents of the tube. Focusing on the fact that it has a desirable function as a material for lids, we collected the waste and used it as a blind lid for the extrusion outlet. In addition to manufacturing barrier materials, there is no need to procure materials or cut processing lines to manufacture blind lids, which simplifies the process, prevents deterioration of the contents, and streamlines the manufacturing of blind tubes with lids. In particular, in the field of laminated extruded tubes, an increase in manufacturing costs has been an unavoidable factor. can be realized,
In addition, the blind lid itself is embossed in a special dish shape, making it easy to open and preventing the opened fragments from turning outward when pushing out the contents after opening the lid. It has various beneficial effects such as being able to prevent the appearance of the lid from occurring, improving its appearance, preventing the lid from accidentally falling off, and having excellent virginity.

[Brief explanation of drawings]

The figure is an enlarged vertical cross-sectional view of the main part of an extruded tube with a blind lid, which is an embodiment of the present invention. 1...Tube body 2...Shoulder 3...Extrusion port 5...Barrier material 6...Blind lid inventor Tera 1) Katsu Doors open
Isamuji Nakamura Shigesakaguchi Takeoyama Kawa Koji Patent Applicant Kyodo Printing Co., Ltd. Agent Patent Attorney Yoshimura Yoshimura − Procedural Amendment 4

Claims (1)

[Claims] 1. An extruded tube with a blind lid, characterized in that the extrusion port of the laminate tube has a shoulder portion covered with a barrier material and a blind lid made of the same material as the barrier material.