vial caps

Abstract

The present invention aims to provide a lid material that reduces the amount of petroleum-derived resin while maintaining its external shape and tension. [Solution] The vial bottle lid material of the present invention comprises a cylindrical body portion having a ceiling portion with an opening in the center, the upper end closed and the lower end open, a resin cap portion that closes the opening, and a projection portion formed integrally with the resin cap portion and provided on the lower surface of the resin cap portion, which is bent outward to form an insertion portion into which the edge portion forming the opening is inserted, and the resin cap portion is made of a resin formed by mixing petroleum-derived resin and plant-derived resin.

Description

Technical Field

[0001] The present invention relates to a lid material for vials, particularly a lid material for vials using bioplastics (plant-derived resins).

Background Art

[0002] Generally, as shown in FIGS. 4 to 7, a vial for drug filling includes a bottle body 1 made of glass or the like, and a circular opening 1b formed on the upper end surface of a neck portion 1a formed on the upper portion of the bottle body 1. A rubber stopper 2 whose lower portion is inserted into the opening 1b, and a lid material 3 that sandwiches the rubber stopper 2 from above between the neck portion 1a and presses the rubber stopper 2 against the opening 1b to seal it.

[0003] The neck portion 1a is formed by connecting, for example, two upper and lower cylindrical bodies, and the outer diameter of the upper portion (flange portion) thereof is formed larger than the outer diameter of the lower portion, and a step portion 1c is formed.

[0004] The lid material 3 includes, for example, as shown in FIG. 5, a metal cylindrical body portion 4 made of aluminum or the like whose upper end is closed by a ceiling portion 4a having an opening 5 in the center and whose lower end is open, and a resin cap 6 that covers the upper portion of the cylindrical body portion 4 and has a ceiling portion covering the opening 5 from above and is composed of a cylindrical body with a lower opening.

[0005] On the lower surface of the ceiling portion of the resin cap portion 6, an annular protrusion 7 (crimping portion) that is closely fitted into the opening 5 of the cylindrical body portion 4 is formed. The protrusion 7 is inclined outward and bent so as to form an insertion portion into which an edge portion forming the opening 5 can be inserted, and if necessary, it is formed so as to be bent until the tip portion becomes horizontal. The protrusion 7 is formed, for example, as a cylindrical body that can be fitted into the inner diameter of the opening 5 before being inserted into the opening 5. After being inserted into the opening 5, the cylindrical body (crimping claw) is expanded outward from below and crimped, so that the protrusion is bent outward and formed to cover the edge portion of the opening 5.

[0006] The projection 7 is formed by integral molding with the resin cap 6.

[0007] Furthermore, the inner diameter A of the resin cap portion 6, which is made up of the cylindrical body described above, can range from 32 mm to 13 mm in diameter, for example, there are five types with diameters of 32 mm, 20 mm, 16 mm, 14 mm, and 13 mm.

[0008] Furthermore, the thickness of the resin cap portion 6 is, for example, 0.8 mm to 2.0 mm.

[0009] Furthermore, the inner diameter B of the opening 5 of the cylindrical body portion 4 is, for example, 7.0 mm to 10.0 mm in diameter.

[0010] Furthermore, the crimping diameter C of the resin cap portion 6 is, for example, 8.0 mm to 13.0 mm, and the thickness of the projection 7 of the resin cap portion 6 is, for example, 0.3 mm to 1.0 mm.

[0011] To form the vial, as shown in Figures 6 and 7, the lid material 3 is placed over the neck portion 1a of the vial body 1 from above, with the rubber stopper 2 in between. As shown in Figure 4, the lower part 4b of the cylindrical portion 4 of the lid material 3 is folded inward at the stepped portion 1c of the neck portion 1a and crimped, thereby pressing the rubber stopper 2 against the opening 1b and making the opening 1b tightly sealed.

[0012] Furthermore, the resin cap portion 6 of the lid material 3 has conventionally been formed from petroleum-derived resins such as petroleum-derived polypropylene resin. [Prior art documents] [Patent Documents]

[0013] [Patent Document 1] Japanese Patent Publication No. 2019-177040 [Overview of the Initiative] [Problems that the invention aims to solve]

[0014] However, in recent years, due to environmental concerns, there has been a demand for resin caps made from bioplastics. However, resin caps made from bioplastics have low strength and could not be used as lids for vials.

[0015] Therefore, the present invention aims to provide a lid material having a resin cap portion made by mixing a predetermined amount of petroleum-derived resin and a predetermined amount of plant-derived resin, thereby reducing the amount of petroleum-derived resin used, and providing a lid material having a resin cap portion with a good appearance and tension (strength). [Means for solving the problem]

[0016] The vial bottle lid material of the present invention comprises a cylindrical body portion having a ceiling portion with an opening in the center, the upper end closed and the lower end open, a resin cap portion that closes the opening, and a projection portion formed integrally with the resin cap portion and provided on the lower surface of the resin cap portion, which is bent outward to form an insertion portion that fits into the opening and is inserted into the edge forming the opening, and the resin cap portion is made of a resin formed by mixing petroleum-derived resin and plant-derived resin.

[0017] Furthermore, the ratio of the plant-derived resin to the total amount of resin in the resin cap portion formed by the above mixture is characterized by being 5% to 20%.

[0018] Furthermore, the ratio of the plant-derived resin to the total amount of resin in the resin cap portion formed by the above-mentioned mixture is characterized by being 10% to 12%.

[0019] Furthermore, the above-mentioned fossil-derived resin is characterized by being a petroleum-derived polypropylene resin (PP).

[0020] The above-mentioned plant-derived resin is characterized by being plant-derived polyethylene (PE). [Effects of the Invention]

[0021] According to the present invention, it becomes possible to provide a lid material that reduces petroleum-derived resins and maintains the appearance shape and tension.

Brief Description of the Drawings

[0022] [Figure 1] It is a longitudinal side view of the lid material for a vial bottle of the present invention. [Figure 2] It is the result of an evaluation test of the appearance shape and tension when changing the blending ratio of plant-derived polyethylene (PE) with respect to the resin cap portion of the lid material for a vial bottle. [Figure 3] It is an explanatory diagram of the evaluation of the appearance shape in the evaluation test. [Figure 4] It is a longitudinal side view for explaining a conventional vial bottle. [Figure 5] It is a longitudinal side view for explaining the lid material of a conventional vial bottle. [Figure 6] It is a longitudinal side view for explaining the assembly of a conventional vial bottle [Figure 7] It is a longitudinal side view for explaining the assembly of a conventional vial bottle.

Modes for Carrying Out the Invention

[0023] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0024] In addition, the same parts as those described in the conventional example are denoted by the same reference numerals, and the description thereof is omitted.

Examples

[0025] In the present invention, instead of using a conventional vial bottle lid material 3 having a resin cap portion 6 made of a petroleum-derived resin such as polypropylene resin (PP) made from 100% fossil fuels, a lid material 9 having a resin cap portion 8 is used, as shown in Figure 1, which is made by mixing a predetermined amount of a plant-derived resin such as polyethylene (PE) made from 100% corn with a petroleum-derived resin such as polypropylene resin (PP) made from 100% fossil fuels.

[0026] The structure and shape of the lid material 9 are the same as those of the conventional lid material 3. For example, as shown in Figure 1, it consists of a cylindrical metal body part 11 made of aluminum or the like, with its upper end closed by a ceiling part 11a having an opening 10 in the center and its lower end open, and a disc-shaped resin cap part 8, for example, made of a cylindrical body with a ceiling part and a lower opening, which covers the opening 10 from above and closes the opening 10.

[0027] Furthermore, a projection 12 similar to the projection 7 is formed on the lower surface of the resin cap portion 8.

[0028] According to the present invention, it is possible to provide a lid material that reduces the amount of petroleum-derived resin while maintaining its external shape and tension.

[0029] Figure 2 shows the external shape and tension test results when the mixing ratio of plant-derived polyethylene resin (PE) to the total amount of resin in the resin cap portion 8, which is formed by mixing petroleum-derived resin and plant-derived resin, is changed.

[0030] The external shape, as shown in Figure 3, mainly refers to the presence or absence of burrs 13 and sink marks (resin indentations) 14, and was judged by appearance.

[0031] Furthermore, tension refers to the connecting force between the opening 10 of the cylindrical portion 11 of the lid material 9 and the projection 12 of the resin cap portion 8. With the vial bottle body 1 fixed, the tensile force was measured when the resin cap 8 could be removed from the cylindrical portion 11 of the vial bottle by pulling the edge of the resin cap 8 with a pulling device. The tensile force was judged as ○ if it was within the appropriate tensile force range determined for each purpose, △ if it was not appropriate but within the usable range, and × otherwise.

[0032] As a result, when the mixing ratio of the plant-derived resin (the proportion of plant-derived resin to the total amount of resin) was 20% or less, the external shape and tension were good.

[0033] Furthermore, it was found that a mixing ratio of the above-mentioned plant-derived resins is particularly preferable when it is between 10% and 12%.

[0034] In other words, when the concentration exceeds 20%, the resin becomes soft and unable to maintain its shape, resulting in burrs 13 and sink marks 14, and the tension decreases, weakening the tensile force of the resin cap from the cylindrical body.

[0035] Furthermore, if the mixing ratio of plant-derived polyethylene resin is less than 5%, the reduction in petroleum-derived resin is minimal, resulting in less impact on environmental problems; therefore, a ratio of 5% or more is preferable.

[0036] Based on the above, a good lid material can be provided if the content is between 5% and 20%, and a more preferable lid material can be provided if the content is between 10% and 12%.

[0037] In this case, it becomes possible to reduce the amount of petroleum-derived resin and provide a lid material that maintains its external shape and tension. [Explanation of Symbols]

[0038] 1. Bottle body 1a neck 1b opening 1c Stepped section 2. Rubber stopper 3 Lid material 4. Cylindrical section 4a Ceiling 4b Lower part 5 Openings 6. Resin cap section 7 Protrusion 8. Resin cap section 9 Lid material 10 Openings 11a Ceiling section 11 Cylindrical body 12 Protrusion 13 Bali 14 Hike

Claims

1. A cylindrical body section with a ceiling section having an opening in the center, with the upper end closed and the lower end open, A resin cap portion that closes the above-mentioned opening, It consists of a projection formed integrally with the above-mentioned resin cap portion, provided on the lower surface of the above-mentioned resin cap portion, which is fitted into the above-mentioned opening and is bent outward to form an insertion portion into which the edge portion forming the opening is inserted, The above-mentioned resin cap portion is characterized by being made of a resin formed by mixing petroleum-derived resin and plant-derived resin, and is a lid material for vials.

2. The vial cap material according to claim 1, characterized in that the ratio of the plant-derived resin to the amount of resin in the resin cap portion formed by the above mixture is 5% to 20%.

3. The vial cap material according to claim 1, characterized in that the ratio of the plant-derived resin to the amount of resin in the resin cap portion formed by the above mixture is 10% to 12%.

4. The vial bottle lid material according to any one of claims 1 to 3, characterized in that the fossil-derived resin is petroleum-derived polypropylene resin (PP).

5. The above-mentioned plant-derived resin is characterized in that it is plant-derived polyethylene (PE), as described in any one of claims 1 to 3.

6. The vial bottle lid material according to claim 4, characterized in that the above-mentioned plant-derived resin is plant-derived polyethylene (PE).

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