JP2005263238A - Composite lid - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lid which is constituted of a combination of different materials that can be joined securely and assembled easily even if not having high dimension precision in machining, and prevents troubles such as scratching in assembling, cracking or loosening caused by a temperature change, the cracking and/or the swelling of a synthetic resin material caused by an oil component of a content or the like. <P>SOLUTION: The lid can be screwed on a bottle having a screw formed on the outer periphery of its opening. The lid comprises a synthetic resin inner lid, and an outer lid made of a material different from that of the inner material. A screw which is engaged with the screw of the bottle is formed inside the inner lid. The exterior of the inner lid is so formed that the inner lid can be housed inside the outer lid, and the inner and outer lids are glued to each other with a transparent adhesive. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a lid of a container filled with a liquid such as cosmetics, perfumes, drugs, liquor, seasonings, beverages, and the like, and more particularly to a screwable lid that closes the mouth of the container.

Conventional containers filled with cosmetics, perfumes, medicines, liquor, seasonings, beverages, etc. In some cases, the containers may be made transparent to increase the visibility of the contents or to enhance the appearance. The material is glass or synthetic resin. In particular, it is preferred to use a glass that is highly transparent and has a sense of weight in order to give a high-class feeling.
For example, when a synthetic resin such as polyethylene is used, problems such as swelling of the container due to the oil content and discoloration due to the dye of the content have occurred.
In addition, even when using glass that is preferred for use, if the entire container is made of glass, problems such as poor airtightness at the time of closing or damage due to contact between the glass have occurred. . Therefore, it is a bottle stopper that is detachably attached to the bottle mouth of a glass bottle for the purpose of improving sealing and avoiding contact between glass, and an inner stopper made of synthetic resin such as acrylic or propylene. An invention has been made of a screw cap for a glass bottle that is formed by press-fitting a glass casing into a glass exterior portion (see, for example, Patent Document 1).
Japanese Patent Laid-Open No. 10-218206

  However, in the glass bottle screw cap manufactured by this method, since the processing dimensional accuracy of the glass exterior portion is not good, the fit between the glass exterior lid portion and the synthetic resin inner stopper portion should be as intended. It was harder than necessary, or on the contrary, it was loose. In addition, since the inner plug portion and the outer portion are assembled by press fitting, scratches and the like are generated due to stress during assembly, and the manufacture is difficult. In addition, since it is integrated by press fitting, rotation occurs between the inner plug part and the exterior part due to the pressure to close the lid, even if the position at the time of closing is aligned with the screw provided in the inner plug part, There was also a problem that the exterior part shifted.

In addition, acrylic has been introduced as the material of the inner plug, but cracks may occur if the content component contains essential oil or other oil as a fragrance component, for example, when propylene, which is another synthetic resin, is used However, it sometimes causes problems such as swelling. This problem may occur even when a lid made of the above synthetic resin is used instead of glass in addition to the case where the synthetic resin is used as the inner plug portion.
Furthermore, since it is a joined body of two different materials, each material has a different coefficient of thermal expansion, which may cause cracks and loosening due to temperature changes.

  As a result of diligent research in view of the above circumstances, the present inventor has made sure that, even when the lid is manufactured by combining different materials, even if the dimensional accuracy in processing is not high, such as glass, it can be reliably joined and easily It is possible to provide a lid that does not cause defects such as scratches due to assembly, cracks and loosening due to temperature changes, and cracks and swelling of synthetic resin materials due to the oil component of the contents. The title and the present invention have been completed.

That is, the present invention is a lid that can be screwed into a bottle having a screw formed on the outer peripheral surface of the opening. The lid has a synthetic resin inner lid and an outer lid made of a material different from the inner lid. The inner lid is formed with a screw that is screwed with the screw of the bottle, and the outer lid is formed so that the inner lid can be accommodated inside the outer lid. Is characterized by being joined by a transparent adhesive.

  The synthetic resin used for the inner lid is preferably polycyclohexylene dimethylene terephthalate (PCT) or its isomer (PCTA). Here, PTCA is an acid-modified PCT resin. PCT is dimethyl terephthalate (TPA), whereas PCTA has TPA of about 90% and isophthalic acid (IPA) of about 10%.

  The material used for at least one of the bottle or the outer lid is preferably glass.

  Furthermore, it is preferable that the adhesive for joining the inner lid and the outer lid is mainly composed of urethane acrylate.

  It is desirable that the outer shape of the inner lid and the inner shape of the outer lid are substantially matched, and the outer shape of the inner lid is formed asymmetrically with respect to the center point of the screw.

  It is preferable that the outer lid and the inner lid are joined at a part and the other part has a gap.

  According to the present invention, since the lid screwed into the bottle has the inner lid and the outer lid made of different materials, the inner lid can be made of a material highly resistant to the contents. In addition, when the glass and lid materials are glass, damage due to contact and poor sealing performance are problems. However, even in this case, if a soft material is used for the inner lid, damage due to contact can be prevented or when the lid is closed. It becomes possible to improve the sealing property.

  If polycyclohexylene dimethylene terephthalate (PCT) or its variant (PCTA) is used as the material of the inner lid, it is possible to suppress the occurrence of defects such as cracks and swelling due to the oil component of the contents, and the appearance is also transparent. I can do it. For example, EASTAR (registered trademark) AN004 manufactured by Eastman Chemical Co. or Thermx (registered trademark) PCT manufactured by DuPont may be used.

  By using glass as the material used for at least one of the bottle or the outer lid, it is possible to provide a high-quality container with high transparency and weight.

  Furthermore, if an adhesive mainly composed of urethane acrylate is used as the adhesive that joins the inner lid and outer lid, the glass and synthetic resin are excellent in adhesion, so there will be no displacement even when the lid is closed. . Further, since the adhesive is transparent, the adhesive is not conspicuous even when viewed from a transparent glass outer lid, and can be finished very beautifully in appearance. For example, there is LOCTITE (registered trademark) 3106 manufactured by Henkel.

  If the outer shape of the inner lid and the inner shape of the outer lid are substantially matched, and the outer shape of the inner lid is formed asymmetrically with respect to the center point of the screw, the screw on the inner peripheral surface of the inner lid and the outer lid portion Since the positional relationship is determined, the outer lid portion and the inner lid portion can be easily assembled.

  If the outer lid and the inner lid are joined in part and the other part is formed to have a gap, even if a change in shape occurs due to a difference in thermal expansion coefficient of each material due to a change in temperature, The change in shape can be absorbed by the gap.

  Hereinafter, an embodiment using the composite lid of the present invention will be described with reference to the drawings.

  FIG. 1 is a top view of a glass bottle 1 to which the composite lid of the present invention is applied, FIG. 2 is a front view of the glass bottle 1 (the lid is an AA cross-sectional view), and FIG. It is a front view which shows the state which removed 3. FIG. 4 and 5 are top views of the inner lid 5, FIG. 6 is a cross-sectional view of the inner lid 5 taken along the line BB, and FIG. 7 is a front view of the inner lid 5. FIG. 8 is an AA cross-sectional view of the outer lid 4, and FIG. 9 is an AA cross-sectional view of the composite lid 3. FIG. 10 shows another embodiment of the inner lid 5.

The glass bottle 1 is composed of a glass container body 2, a composite lid 3 including a glass outer lid 4 and a synthetic resin (PCT: polycyclohexylene dimethylene terephthalate) inner lid 5 (FIG. 2).
A screw 2b is formed on the outer peripheral surface of the opening 2a of the container body 2. The screw 2b formed on the container main body opening 2a is screwed onto the inner peripheral surface of the transparent synthetic resin inner lid 5. A screw 5a is formed (FIGS. 3 and 6).

The outer lid 4 is provided with an outer lid recess 4a adapted to the outer shape of the inner lid 5 (FIG. 8).
The inner lid 5 is combined with the outer lid concave portion 4a so that the inner lid bonding portion 5b and the outer lid bonding portion 4b are in contact with each other. The adhesive is applied and bonded to the inner lid bonding portion 5b and the outer lid bonding portion 4b. The other inner lid non-adhering part 5c and outer lid non-adhering part 4c are not adhered, and a space 6 is formed by the inner lid non-adhering part 5c and the outer lid non-adhering part 4c (FIGS. 8 and 9). .
The space 6 absorbs stress caused by cracks and loosening caused by temperature changes caused by different thermal expansion coefficients of the individual materials in the composite lid 3 manufactured from different materials, thereby preventing the occurrence of the above-mentioned problems. (FIG. 9).

  As shown in FIGS. 4 to 7, the inner lid 5 includes a substantially cylindrical portion 5 x having a screw provided on the inner peripheral surface, and an inner lid bonding portion 5 b that is in contact with the outer lid 4 and is bonded by applying an adhesive. And a substantially plate-like portion 5y. The shape of the inner lid 5 is asymmetric with respect to the center point (screw center point) 5z of the substantially cylindrical portion 5x. If the inner lid 5 has such a shape, the shape of the outer lid recess 4a is adapted to the inner lid 5, so that the positional relationship between the screw on the inner peripheral surface of the inner lid 5 and the outer lid 4 is determined. The outer lid 4 and the inner lid 5 can be easily assembled. FIG. 10 shows another embodiment of the inner lid 5. Similar to the previous embodiment, it is asymmetric with respect to the center point (screw center point) 5z.

  Here, the material of the inner lid 5 is polycyclohexylene dimethylene terephthalate (PCT), but a variant (PCTA) may be used. As these materials, for example, Eastman (registered trademark) AN004 manufactured by Eastman Chemical Co. or Thermx (registered trademark) PCT manufactured by DuPont is used. Thereby, generation | occurrence | production of malfunctions, such as a crack by the oil component of a content and swelling, can be suppressed.

  Further, since the inner lid 5 and the outer lid 4 are joined with an adhesive that has been produced with a moderate fitting accuracy, they can be easily and reliably joined. In addition, there is no occurrence of problems such as scratches caused by intense contact between materials during assembly, or conversely loose joints, which can occur with products designed with tight fitting accuracy.

The adhesive is mainly composed of urethane acrylate. This is excellent in the adhesion between glass and synthetic resin, between glasses, and between synthetic resins, and since it is transparent, it can be expected to have a beautiful finish with an inconspicuous adhesive surface. For example, LOCTITE (registered trademark) 3106 manufactured by Henkel Corporation can be used. Since the inner lid 5 and the outer lid 4 are securely joined by this adhesive, the inner lid 5 and the outer lid 4 are not displaced even by the pressure when the lid is closed. If this part is not securely joined, the rotational displacement occurs due to the pressure at the time of closing the lid, and the outer lid 4 causes the rotational displacement even if it is positioned by the screw screwed to the inner lid 5, thereby completing the closing of the lid. There will be a shift in the position of the lid at that time. Furthermore, since the adhesive is transparent, the adhesive is not conspicuous even when viewed from the transparent glass outer lid 4, and the appearance can be finished very beautifully, and the appearance can be made transparent.

The composite lid of the present invention is not limited to the above-described embodiment. For example, the container may not necessarily be made of glass, and the same effect can be expected even if it is made of a synthetic resin. Synthetic resin is also used for the outer lid, and for example, the outer lid is weak against oil components but cheap, and the inner lid is resistant to oil components but expensive. However, it is possible to reduce costs.
Further, the adhesion location (contact location) between the inner lid portion and the outer lid portion may be in the opposite relation to the present embodiment regardless of the portion of the present embodiment. For example, by making the height of the inner lid 5 larger than the height of the outer lid recess 4a, the outer top surface of the substantially cylindrical portion 5x of the inner lid 5 becomes an adhesive portion, and the upper surface side of the substantially plate-like portion 5y is a non-adhesive portion. And a space 6 is formed.
Furthermore, in this example, the color is not described, but since the transparent adhesive is used, both the outer lid and the inner lid may be transparent. Even if it is colored, it can be finished beautifully, or vice versa. Of course, both the outer lid and the inner lid can be colored.

  Examples of use of the present invention include containers for cosmetics, perfumes, medicines, liquor, seasonings, beverages, etc., especially those that contain oil components in their contents, and are intended to give a beautiful appearance and a high-class feeling. It is preferable.

The top view of the glass bottle 1 which shows a present Example The front view of the glass bottle 1 which shows a present Example (a cover part is AA sectional drawing). The front view which shows the state which removed the compound cover 3 of the glass bottle 1 which shows a present Example The top view of the inner cover 5 in the Example of this invention. The top view of the inner cover 5 in the Example of this invention. BB sectional drawing of the inner lid 5 in the Example of this invention. The front view of the inner cover 5 in the Example of this invention AA sectional view of outer lid 4 in the example of the present invention. AA sectional view of compound lid 3 in an example of the present invention. FIG. 4 is a top view of the inner lid 5 according to another embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Glass bottle 2 Container main body 2a Container main body opening part 2b Container main body opening part screw 3 Composite cover 4 Outer cover 4a Outer cover recessed part 4b Outer cover adhesion part 4c Outer cover non-adhesion part 5 Inner cover 5a Inner cover screw 5b Inner cover adhesion part 5c Inner lid non-adhesive portion 5x A substantially cylindrical portion of the inner lid 5 5y A substantially plate-like portion of the inner lid 5 5z A center point of the substantially cylindrical portion of the inner lid 5 (screw center point)
6 Space 7 Inner lid cushion

Claims (6)

A lid that can be screwed into a bottle having a screw formed on the outer peripheral surface of the opening. The lid has an inner lid made of synthetic resin and an outer lid made of a material different from the inner lid. Is formed with a screw to be screwed with the screw of the bottle, the outer side of the inner lid is formed so that the inner lid can be accommodated inside the outer lid, and the inner lid and the outer lid are transparent adhesive. Composite lid characterized by being joined by The composite lid according to claim 1, wherein the synthetic resin used for the inner lid is polycyclohexylene dimethylene terephthalate (PCT) or a variant thereof (PCTA). The composite lid according to claim 1 or 2, wherein the material used for at least one of the bottle and the outer lid is glass. The composite lid according to any one of claims 1 to 3, wherein the adhesive that joins the inner lid and the outer lid is mainly composed of urethane acrylate. The composite lid according to any one of claims 1 to 4, wherein the outer shape of the inner lid and the inner shape of the outer lid are substantially matched, and the outer shape of the inner lid is formed asymmetrically with respect to the center point of the screw. The composite lid according to any one of claims 1 to 5, wherein the outer lid and the inner lid are joined at a part, and the other part has a gap.