JP2011219126A - Heat insulating container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat insulating container such as a heat insulating mug or a thermos bottle in which any separate member is hardly peeled off.SOLUTION: In the heat insulating container, an internal container 3 and an external container 6 are disposed with a vacuum heat insulating space 8 therebetween, and the internal container 3 and the external container 6 are integrated with each other by joining mouth parts 7 thereof with each other. The heat insulating container and a protective plate 15 as a separate member are adhered to each other with a synthetic resin-made thermoadhesive 16. The synthetic resin-made thermoadhesive 16 fills a space between the outer container 6 and the protective plate 15 by heat melting and pressurization of the synthetic resin-made hot glue 16, and thus, the protective plate 15 can be adhered to the external container 6.

Description

  The present invention relates to a heat insulating container such as a heat insulating mug or a thermos.

  Conventionally, this type has a heat insulating container in which an inner container and an outer container are arranged with a space between them and an end portion of the inner container and the outer container are joined together, and an exhaust hole A cover sheet, which is a separate member, is attached to the sealing portion sealed with a brazing material (for example, Patent Document 1), or a protective plate, which is a separate member, is attached using an adhesive. It was intended to improve protection and appearance.

JP 2000-316729 A

  However, in conventional seals and adhesives, peeling occurred due to insufficient adhesion and durability problems during actual use and cleaning. In order to improve the adhesive strength and durability of the adhesive, surface treatment with active gas such as plasma treatment, UV treatment, corona treatment, chemical treatment such as acid dipping and anodic oxidation, silane coupling agent and thiol coupling agent Various methods such as primer treatment are employed. However, the surface treatment with the active gas has not been improved sufficiently, and any of the methods has increased manufacturing costs due to the addition of processes.

  Therefore, in view of the above-described problems, the present invention has an object to provide a heat-insulating container in which another member is difficult to peel off at a low cost.

In the heat insulating container of the invention of claim 1, in the heat insulating container integrated by disposing the inner container and the outer container with a space therebetween and joining the end portions of the inner container and the outer container,
The heat insulating container and another member are closely attached with a synthetic resin thermal adhesive.

  In the heat insulating container of the invention of claim 2, the synthetic resin thermal adhesive is a modified polyolefin.

  In the heat insulation container of the invention of claim 3, the heat treatment temperature of the synthetic resin thermal adhesive is 90 to 220 ° C.

  In the heat insulating container of the invention of claim 4, the thickness of the synthetic resin thermal adhesive is 30 to 200 μm.

  According to the first aspect of the present invention, the synthetic resin thermal adhesive fills the gap between the container and the separate member by heat melting and pressurizing, thereby bringing the separate member into close contact with each other. Can do.

  According to the second aspect of the present invention, since the modified polyolefin is used for the synthetic resin thermal adhesive, the resin or metal can be strongly bonded with excellent durability.

  According to invention of Claim 3 of this invention, it can process at the temperature which does not affect a heat insulation container, another member, or the material which comprises them.

  According to invention of Claim 4 of this invention, since it can adhere | attach only by arrange | positioning and heating a synthetic resin thermal adhesive between adherends, workability | operativity is good. Moreover, since the synthetic resin-made thermal adhesive has a sufficient thickness to absorb the deformation of the heat insulating container or the separate member, the gap between the heat insulating container and the separate member can be filled and adhered.

It is sectional drawing which shows Example 1 of the heat insulation container of this invention. It is sectional drawing which made the bottom side of the container upward. FIG. 3 is an exploded perspective view of the outer container as seen from the bottom side. It is sectional drawing which shows Example 2 of the heat insulation container of this invention.

  Preferred embodiments of the present invention will be described with reference to the accompanying drawings. The embodiments described below do not limit the contents of the present invention described in the claims. In addition, all of the configurations described below are not necessarily essential requirements of the present invention.

  1 to 3 show a first embodiment of a heat insulating container according to the present invention. In the figure, a heat insulating double container such as a mug or a thermos as a vacuum structure has an inner bottom plate portion 2 at the bottom of the inner cylindrical portion 1. The inner container 3 and the outer container 6 having the outer bottom plate part 5 at the bottom of the outer cylinder part 4 are joined to the respective upper openings 7, and the inner container 3 and the outer container 6 are made of stainless steel, For example, it is made of 18-8 stainless steel. A gap between the inner container 3 and the outer container 6 forms a vacuum heat insulating space 8, which is formed in the center of the outer cylinder portion 4 through an exhaust hole 9 that communicates the inside and the outside. 8 is evacuated and then sealed with a brazing material 10. A getter (not shown) is attached to the surface of the inner container 3 on the vacuum heat insulating space 8 side or the surface of the outer container 6 on the vacuum heat insulating space 8 side.

  A small hole-like exhaust hole 9 is formed in the outer bottom plate portion 5, and the periphery of the exhaust hole 9 is formed in a concave shape on the heat insulation space 8 side with a circular plane. The upper and lower recesses have a small-diameter cylindrical recess 11 (hereinafter referred to as a small-diameter cylindrical recess 11), which is a narrow recess with the exhaust hole 9 formed in the deepest portion, and the small-diameter cylindrical recess 11 and It consists of a two-stage cylinder having a large-diameter cylindrical recess 12 (hereinafter referred to as a large-diameter cylindrical recess 12) that is a wide recess formed between the outer bottom plate portion 5 and the surface.

  A sealing portion 13 that seals the exhaust hole 9 is formed by the brazing material 10 filled in the small-diameter cylindrical recess 11. The brazing material 10 is a metal or glass brazing material.

  The large-diameter cylindrical recess 12 has a protective plate 15 formed in a disc shape so as to be loosely fitted to a bottom surface 14 (hereinafter referred to as the large-diameter bottom surface 14) that is substantially donut-shaped when viewed from the bottom. It is bonded to a large-diameter bottom surface 14 which is an adhesive surface through a heat-producing adhesive 16. The protective plate 15 is made of stainless steel, such as 18-8 stainless steel, similar to the inner container 3 and the outer container 6.

  In the metal vacuum insulation container having the above configuration, the synthetic resin thermal adhesive 16 formed in a film shape with a thickness D of 30 to 200 μm is heated and melted and pressurized by heat treatment at 90 to 220 ° C. Since the heat-adhesive 16 can completely fill the gap between the large-diameter bottom surface 14 and the protective plate 15 and allow the protective plate 15 to adhere to the large-diameter bottom surface 14, water can enter between the protective plate 15 and the heat insulating container. In addition, there is no metal corrosion or deterioration of the heat insulation performance due to metal corrosion.

  Since the modified polyolefin is used for the synthetic resinous thermal adhesive 16, the resin or metal can be strongly bonded with excellent durability.

  Furthermore, when one of the outer container 6 of the heat insulating container and the protective plate 15 which is a separate member is made of resin, the synthetic resin thermal adhesive 16 and the heat insulating container and the protective plate 15 have good compatibility. Can be strongly bonded.

  Furthermore, even if the inner container 3, the outer container 6, and the protective plate 15 of the heat insulating container are made of metal, by setting the heat treatment temperature to 90 to 220 ° C., the heat insulating container, the protective plate 15 or the material constituting them is affected. Can be processed at no temperature.

  The bonded synthetic resin thermal adhesive 16 can be easily peeled off by reheating. Therefore, easy reprocessing by reheating becomes possible.

  As described above, this embodiment corresponds to claim 1, and the inner container 3 and the outer container 6 are disposed with the vacuum heat insulating space 8 therebetween, and are the ends of the inner container 3 and the outer container 6. In the heat insulating container integrated by joining the mouth portion 7, a protective plate 15, which is a separate member from the heat insulating container, is closely attached by a synthetic resin thermal adhesive 16. In this case, when the synthetic resin thermal adhesive 16 is heated and melted and pressurized, the adhesive 16 fills the gap between the outer container 6 and the protective plate 15, and the protective plate 15 can be brought into close contact with the outer container 6.

  Further, this example corresponds to claim 2 and, since the synthetic resin thermal adhesive 16 is a modified polyolefin, the resin or metal can be strongly bonded with excellent durability.

  Further, this embodiment corresponds to claim 3, and the heat treatment temperature of the synthetic resin thermal adhesive 16 is 90 to 220 ° C., which affects the heat insulating container, the protective plate 15 or the material constituting them. Can be processed at no temperature. When the heat treatment temperature of the synthetic resin thermal adhesive 16 is lower than 90 ° C., there is a problem that the synthetic resin thermal adhesive 16 does not melt and a sufficient adhesive force cannot be obtained. Further, when the heat treatment temperature is higher than 220 ° C., sealing failure due to the heat effect on the brazing material 10 occurs, or when either the heat insulating container or the protective plate 15 is made of resin, deformation or distortion due to heat occurs. There is a problem. The heat treatment temperature is preferably 100 to 180 ° C. from the viewpoint of reducing the thermal influence on the heat insulating container and other members and obtaining sufficient adhesive force.

  Further, this embodiment corresponds to claim 4, and the thickness D of the synthetic resin thermal adhesive 16 is 30 to 200 μm, so that the outer container 6 and the protective plate 15 of the heat insulating container as the adherend are adhered. Since the synthetic resin thermal adhesive 16 is placed between them and they can be bonded simply by heating, workability is good. Since the synthetic resin thermal adhesive 16 has a sufficient thickness D that can absorb deformation of the heat insulating container or another member, the gap between the outer container 6 of the heat insulating container and the protective plate 15 can be filled and brought into close contact. If the thickness D of the synthetic resin thermal adhesive 16 is smaller than 30 μm, there is a problem that the gap caused by the distortion of the outer container of the heat insulating container or the protective plate 15 cannot be filled and cannot be adhered. On the other hand, if the thickness D is larger than 200 μm, the melted synthetic resin thermal adhesive 16 is pushed out from between the outer container of the heat insulating container and the protective plate 15 and the appearance cannot be kept clean.

  FIG. 4 shows a second embodiment. The same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. In the second embodiment, a non-slip material 17 is bonded as a separate member to the outer cylindrical portion 4 of the heat insulating container via a synthetic resin adhesive 16.

  The anti-slip material 17 is made of a synthetic resin belt-like member having an anti-slip uneven portion 18 on the outer surface, and is mounted so as to cover the entire circumference of the outer cylinder portion 4.

  In this embodiment, by using the synthetic resin adhesive 16 as a modified polyolefin, different materials having the outer container 6 made of metal and the antiskid material 17 made of resin can be strongly bonded to each other.

  As described above, this embodiment corresponds to the first aspect, and the inner container 3 and the outer container 6 are disposed with the vacuum heat insulating space 8 therebetween, and are the end portions of the inner container 3 and the outer container 6. In the heat insulating container integrated by joining the mouth portion 7, the non-slip material 17 which is a separate member from the heat insulating container is adhered by the synthetic resin thermal adhesive 16, so that the synthetic resin thermal adhesive 16 is heated and melted. By pressurizing, the adhesive 16 fills the gap between the outer container 6 and the anti-slip material 17, and the anti-slip material 17 can be brought into close contact with the outer container 6.

  The present invention is not limited to the above embodiments, and various modifications can be made within the scope of the gist of the present invention. For example, another member made of resin or metal for decoration may be bonded to the outer cylinder portion 4 or the outer bottom plate portion 5 of the outer container 6 with the synthetic resin thermal adhesive 16 of the present invention.

  As described above, the heat insulating container according to the present invention can be applied to various uses.

3 Inner container 6 Outer container 7 End
15 Protection plate (separate member)
16 Synthetic resin thermal adhesive
17 Anti-slip material (separate member)

Claims (4)

In an insulated container that is integrated by disposing an inner container and an outer container across a space and joining the end portions of the inner container and the outer container,
A heat-insulating container, wherein the heat-insulating container and another member are in close contact with a synthetic resin thermal adhesive. The heat insulating container according to claim 1, wherein the synthetic resin thermal adhesive is a modified polyolefin. The heat insulating temperature of the synthetic resin thermal adhesive is 90 to 220 ° C. The heat insulation container according to claim 2 or 3, wherein the synthetic resin thermal adhesive has a thickness of 30 to 200 µm.

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