JP4802815B2 - Plastic container with dry resin inner container - Google Patents

Description

  The present invention relates to a plastic container having a dry resin inner container in which the dry resin inner container is inserted into the outer container main body, the humidity in the container is maintained at 10% RH or less, and the limit of the effective drying function can be easily confirmed. It is about.

  Conventionally, as a container for storing contents that require a high dry environment with a humidity of 10% RH or less, such as sensor chips for blood sugar levels, test paper for detecting urine protein, health foods, electronic parts, pharmaceutical tablets, etc. For example, a container of CSP is known in which a lid portion is connected to an outer container body through a hinge so as to be opened and closed, and an inner container made of a dry resin is integrally molded in the outer container body by a two-color injection molding method. It was.

  However, the container described above is configured so that the lid and the outer container are locked and sealed by the occlusal ring provided on the outer peripheral upper end outer peripheral surface of the outer container and the occlusal ring provided on the lower peripheral inner peripheral surface of the lid. Since the lock and the seal are of the same structure, there is a case where the occlusal portion is worn or scratched due to use, and the sealability is problematic. In addition, it is impossible to optimally adjust the click feeling when the lid is closed to the outer container (the lock feeling that clicks) and the sealing performance of the container separately. The dry resin is a mixture of the molecular sieve and glycol as the desiccant mixed in the base resin polyolefin. The dry resin is integrally molded in the outer container by a two-color injection molding method. As the agent, an expanding desiccant (for example, calcium oxide) or a water absorbent (for example, an acrylic polymer water absorbent) cannot be used, and the desiccant to be used is limited. In addition, the dry resin using glycol as a desiccant is yellowish because the glycol component is eluted on the surface by absorbing water, but it is difficult to recognize the limit of the water absorption capacity of the dry resin by this yellowness.

  The present invention solves the above-described problems of the conventional container having a drying function, and the click feeling when the lid is closed and the sealing property of the container can be adjusted separately, and the lid can be opened and closed. Accordingly, there is provided a plastic container having a dry resin inner container in which there is little influence on the click feeling and the sealing property due to the deterioration of the members accompanying the above, and the limit of the effective drying function can be easily confirmed.

  That is, the present invention is a cylindrical container in which a lid portion is openably and closably connected to an upper end opening of an outer container main body into which an inner container made of a dry resin is inserted, and the outer container is open and closed. A plurality of occlusal protrusions with the lid portion are provided at equal intervals in the circumferential direction on the outer peripheral upper end outer peripheral surface of the main body, and an occlusal ring with the outer container main body is provided on the inner peripheral surface of the lower end of the peripheral wall of the main lid. In addition, an inner ring that is in close contact with the inner peripheral surface of the upper end of the peripheral wall of the outer container body is suspended, and the dry resin disperses and mixes the calcium oxide and / or polymer water absorbent, which is a desiccant that expands when the base resin absorbs water. A plurality of V-shaped cross-sectional ventilation grooves are provided at equal intervals in the circumferential direction from the upper surface of the inner container to the lower end of the outer surface, and a plurality of vent holes are provided in the bottom wall. Upper end position of the peripheral wall rising by water absorption at the limit of effective drying capacity Correspondingly, an effective drying capacity limit line of the inner container is provided on the inner peripheral surface of the peripheral wall of the outer container main body, and the tip position of the inner ring of the lid member is positioned above the effective drying capacity limit line of the inner container. A plastic container having a dry resin inner container.

  The plastic container having the dry resin inner container of the present invention has a plurality of occlusal protrusions provided at equal intervals in the circumferential direction on the outer peripheral upper end outer peripheral surface of the outer container body when the lid is closed to the outer container body. The occlusal ring provided on the inner peripheral surface of the lower end of the peripheral wall of the lid bites and feels a click feeling. Moreover, the outer peripheral surface of the inner ring suspended from the lower surface of the top plate of the lid portion is in close contact with the inner peripheral surface of the upper end of the peripheral wall of the outer container body, and the outer container body is sealed by the lid portion. Therefore, by changing the number of occlusal protrusions of the outer container body or the degree of occlusion with the occlusal ring of the lid, it is possible to adjust the click feeling when the lid is closed, and separately, By changing the degree of close contact between the outer peripheral surface of the inner ring and the inner peripheral surface of the outer peripheral wall upper end of the outer container main body, the sealing performance of the container can be adjusted. In addition, since the click feeling when the lid is closed and the sealing of the container are performed separately, the effects on the click feeling and the sealing performance due to member deterioration due to multiple opening and closing of the lid during use are compared. Less.

  Further, the plastic container having the dry resin inner container of the present invention is one in which the desiccant calcium oxide and / or polymer water-absorbing material which expands when the dry resin in the inner container absorbs water into the base resin is dispersed and mixed. As the water in the container is absorbed, the upper end of the peripheral wall of the inner container extends upward. Therefore, if the inner container's effective drying capacity limit line is placed on the inner peripheral surface of the outer wall of the outer container body in correspondence with the upper end position of the peripheral wall rising due to water absorption at the inner container's effective drying capacity limit, the container's effective The limit of the drying function can be easily confirmed. In addition, since the tip position of the inner ring of the lid is provided in the upper position near the effective drying capacity limit line of the inner container, when the inner container absorbs water beyond the limit of the effective drying capacity, the inner ring of the lid The top end of the inner container and the upper end of the inner wall of the inner container come into contact with each other so that the lid portion does not close.

  Next, an embodiment of a plastic container having a dry resin inner container of the present invention will be described in detail with reference to the drawings.

  A plastic container (10) having a dry resin inner container of this embodiment is a cylindrical container in which an inner container (200) made of dry resin is inserted inside an outer container (100) as shown in FIG. is there.

  As shown in FIGS. 1 and 2, the outer container (100) is connected to the upper end opening of the outer container main body (110) through a hinge (101) so that the lid (120) can be opened and closed. The main body (110) includes a peripheral wall (111) and a bottom wall (115), and a plurality of occlusal protrusions (112) with a lid portion (120) are provided at equal intervals in the circumferential direction on the outer peripheral surface of the upper end of the peripheral wall. A lid receiving ring (113) is provided on the upper outer peripheral surface, and the inner peripheral surface of the peripheral wall (111) of the outer container body (110) corresponds to the upper end position at the limit of the effective drying capacity of the peripheral wall (201) of the inner container (200). Thus, the effective drying capacity limit line (114) of the inner container is provided. The lid (120) includes a top plate (121) and a peripheral wall (123), and an inner ring (122) for sealing the outer container main body (110) on the lower surface of the top plate (the outer peripheral surface is the peripheral wall of the outer container main body). The opening and closing knob (125) protrudes from the front lower end of the peripheral wall (123), and the occlusal ring with the outer container body (on the lower end inner peripheral surface of the peripheral wall (123) 124). The outer container is formed by integrally molding the outer container main body and the lid by an injection molding method using a thermoplastic resin such as polypropylene.

Next, as shown in FIG. 3A, the inner container (200) is a cup-shaped container including a peripheral wall (201) and a bottom wall (204). ) And FIG. 4, a plurality of V-shaped cross-sectional ventilation grooves (203) are provided at equal intervals in the circumferential direction continuously from the upper surface (202) to the lower end of the outer peripheral surface, and the bottom wall (204) As shown in FIGS. 3A and 3B, a large number of vent holes (205) are provided. The V-shaped cross-sectional ventilation groove provided on the outer periphery of the peripheral wall and the vent hole penetrating the bottom wall improve water absorption by the inner container in the container, and when the inner container is set in the outer container body Good setability. The inner container is molded by an injection molding method separately from the outer container, using a drying resin that disperses and mixes calcium oxide and / or polymer water-absorbing agent, which expands when water is absorbed into the base resin.

  In addition, as for the calcium oxide used for dry resin, a thing with a particle size of 5-100 micrometers is preferable from a water absorption capability. The polymer water-absorbing body is an acrylic polymer water-absorbing body and preferably has a particle diameter of 5 to 100 μm. Examples of the combination of the desiccant include calcium oxide and polymer water absorbent, molecular sieve and polymer water absorbent, molecular sieve, calcium oxide and polymer water absorbent. Further, as the base resin, linear low density polyethylene, low density polyethylene, soft polypropylene, ethylene / propylene / diene ternary copolymer rubber, ethylene / propylene rubber, and the like that can expand due to water absorption of the desiccant are preferable.

It is sectional drawing of the plastic container which has the dry resin inner container of one Embodiment of this invention which inserts the inner container which consists of dry resin inside by the outer container main body which a cover part connects so that opening and closing is possible via a hinge. It is an expanded sectional view of the principal part of the plastic container which has the dry resin inner container of one Embodiment of this invention of FIG. (A) is sectional drawing of the inner container of the plastic container which has the dry resin inner container of one Embodiment of this invention of FIG. 1, (b) is the bottom view. It is the top view which notched some inner containers of the plastic container which has the dry resin inner container of one Embodiment of this invention of FIG.

Explanation of symbols

10 ... Container 100 ... Outer container 101 ... Hinge 110 ... Outer container body 111, 123, 201 ... Peripheral wall 112 ... Occlusal protrusion 113 ... Lid receiving ring 114 ... Effective drying capacity limit line 115, 204 …… Bottom wall 120 …… Cover portion 121 …… Top plate 122 …… Inner ring 124 …… Occlusal ring 125 …… Opening / closing knob 200 …… Inner container 202 …… Top surface 203 …… Ventilation groove 205 …… Ventilation hole

Claims (1)

  A cylindrical container in which a lid part is openably and closably connected to an upper end opening of an outer container main body into which an inner container made of a dry resin is inserted inside, and an outer peripheral upper end outer peripheral surface of the outer container main body A plurality of occlusal protrusions with the lid portion at equal intervals in the circumferential direction, an occlusal ring with the outer container body is provided on the inner peripheral surface of the lower end of the peripheral wall of the lid portion, An inner ring that is in close contact with the inner peripheral surface of the upper end of the peripheral wall is suspended, and the dry resin disperses and mixes the calcium oxide and / or polymer water-absorbing agent that expands when the base resin absorbs water, and the inner container A plurality of V-shaped ventilation grooves are provided at equal intervals in the circumferential direction continuously from the upper surface of the peripheral wall to the lower end of the outer peripheral surface, and a plurality of ventilation holes are provided in the bottom wall to absorb water at the effective drying capacity limit of the inner container. Corresponding to the upper end position of the peripheral wall rising by the outer container An effective drying capacity limit line of the inner container is provided on the inner peripheral surface of the peripheral wall of the body, and the tip position of the inner ring of the lid member is provided near the effective drying capacity limit line of the inner container. A plastic container having a dry resin inner container.

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