JPH0728865U - Container lid - Google Patents

Abstract

(57) [Summary] [Purpose] The object is to be able to heat with a microwave while keeping the container opening sealed with the container lid, and to prevent the lid from curling in any direction. [Structure] Stretched synthetic resin films 2 and 4 are adhered to the upper surface and the lower surface of paper 1 one by one, and the total thickness of these two stretched synthetic resin films 2 and 4 is changed from 32μ to 8μ. A lid 8 for a container, characterized in that a heat seal layer 7 is provided on the lower surface of the stretched synthetic resin film 4 on the lower surface side.
Is.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a lid of a container for storing foods such as oshiroko and tea bowl, milk drinks, tea, coffee, cocoa, drinking water, sake and juice.

[0002]

[Prior art]

 The conventional container lid has an aluminum foil bonded with an adhesive on the upper surface of a normal synthetic resin film with a thickness of approximately 38 μ or more, and the lower surface of this polyethylene film is ethylene vinyl acetate copolymer (EVA). Or, it is generally used to provide a heat-sealing layer such as ethylene ethyl acrylate copolymer (EEA).

[0003]

[Problems to be solved by the device]

 With this conventional container lid, a container containing food or liquid beverage is sealed by heat sealing with the lid, and when the eater eats the food or liquid beverage in the container by heating, the aluminum foil is used for the lid. Therefore, there was a problem that the container with a lid containing food and liquid beverages could not be heated as it was in the microwave oven, and because the synthetic resin film was provided on only one side of the aluminum foil, the lid curls in one direction. There was a problem that it was easy to do.

The present invention solves these problems of the conventional container lid, can be heated by a microwave oven while the container opening is sealed by the lid, and the lid does not curl in any direction. The purpose is to make the lid water resistant.

[0005]

[Means for Solving the Problems]

 The lid of the container of the present invention has a stretched synthetic resin film having a total thickness of about 32μ to about 8μ on the upper surface and the lower surface of paper, respectively The heat-sealing layer is provided on the lower surface of the stretched synthetic resin film on the lower surface side.

[0006]

[Action]

 If the upper opening of the container is sealed by heat sealing with the container lid of this invention, since the lid is not made of aluminum foil, the container with the lid containing food or liquid beverage is heated as it is in the microwave oven without removing the lid. . Since the stretched synthetic resin film is provided on each of the upper surface and the lower surface of the paper, the lid is prevented from curling and the lid is water resistant. If the total thickness of the two stretched synthetic resin films, one on the top and one on the bottom of the paper, is reduced to 18 μm or less, the lid of the container with the liquid beverage is covered with a synthetic resin straw. Can be pierced smoothly and the person who drinks the liquid drink can smoothly drink it without removing the lid from the container and spilling the liquid drink with a straw.

[0007]

【Example】

Next, an embodiment of the lid of the container of the present invention will be described with reference to the drawings. Example 1 As shown in FIGS. 1 and 2, a biaxially stretched polyester (PET) having a thickness of 16 μ is formed on the upper surface of an imitation paper 1 having a weight of about 35 g / m ² through an adhesive layer 3 made of a polyester resin. A film 2 is provided, and a biaxially oriented polyester (PET) film 4 having a thickness of 12 μ and having a silicon oxide vapor deposition layer 5 on the upper surface is provided on the lower surface of the imitation paper 1 with an adhesive layer 6 of a polyester resin interposed therebetween. A lid 8 of the container is provided with a heat seal layer 7 made of an ethylene vinyl acetate copolymer (EVA) film via an adhesive layer 7 ′ on the lower surface of the biaxially stretched polyester (PET) film 4 on the lower surface side. .

When using the lid 8 of the container of Example 1, as shown in FIG. 3, for example, a tea bowl 10 is put in a container 9 made of polypropylene resin, and the lid 8 is placed in the upper opening of the container 9. A heat seal 11 is applied to the container 9 to seal the upper opening of the container 9. When heating and eating the bowl bowl 10 placed in the lidded container 9, the lidded container 9 is placed in a microwave oven and heated. Since it does not use aluminum foil, it can be microwaved as it is, and since the biaxially stretched polyester films 2 and 4 are laminated on both sides of the thin imitation paper 1, the lid 8 has excellent water resistance and is suitable. It has the strength of and can be easily opened. Since the biaxially stretched polyester film 4 on one side has the silicon oxide vapor deposition layer 5, it has an oxygen barrier property and therefore has excellent storage stability for foods and liquid beverages. In the lid 8 of this Example 1, the one provided with the EVA heat seal layer 7 was explained, but as the thermoplastic synthetic resin constituting the heat seal layer, in addition to EVA, ethylene ethyl acrylate copolymer (EEA), polypropylene (PP) resin, polyester (PET) resin, ethylene-acrylic acid copolymer (EAA), polyester heat seal lacquer, vinyl chloride vinyl acetate heat seal lacquer, Surlyn heat seal lacquer, ethylene acrylic acid copolymer heat seal lacquer , Ethylene vinyl acetate copolymer (EVA) hot melt, etc. Similarly, as the biaxially stretched synthetic resin film, in addition to the PET film of the lid 8 of Example 1, there are a biaxially oriented polypropylene (PP) resin film, a biaxially oriented polyethylene (PE) resin film, and the like. Instead of the stretched synthetic resin film, these films may be uniaxially stretched.

Example 2 As shown in FIG. 4, a biaxially oriented polyester (PET) film having a thickness of 6 μ is formed on the upper surface of a high-quality paper 12 of about 58 g / m ² with an adhesive layer 14 of polyethylene resin interposed therebetween. 13 is provided, and a biaxially stretched polyester (PET) film 15 having a thickness of 6 μ is provided on the lower surface of the high-quality paper 12 via an adhesive layer 16 of polyethylene resin. A lid 18 of a container is provided with a heat seal layer 17 made of an ethylene vinyl acetate copolymer (EVA) film via an adhesive layer 17 ′ on the lower surface of the biaxially oriented polyester (PET) film 15 on the lower surface side. .

When using the lid 18 of the container of the second embodiment, as shown in FIG. 5, for example, the milk beverage 20 is put in a synthetic resin container 19, and the lid 18 is heated to the upper opening of the container 19. The seal layer 17 is heat-sealed 21 to seal the upper opening of the container 19. When the milk beverage 20 contained in the lidded container 19 is heated and drunk, the lidded container 19 is placed in a microwave oven, and the milk beverage 20 placed in the container 19 is heated in the microwave oven. After heating the milk drink 20 in the container 19 with a lid by heating, as shown in FIG. 5, the synthetic resin straw 22 is pierced into the lid 18 having the heat seal 21 on the upper side of the container 19 and the straw The person who drinks at 22 drinks the heated milk drink 20.

In the container lid 18 of Example 2, two biaxially stretched PET films having a thickness of 6 μ and the same thickness as 6 μ and having a total thickness of 12 μ were described. If the total thickness of the axially stretched PET film is too large, the strength of the lid is too strong, which makes it difficult for the straw made of synthetic resin to pierce or does not pierce the straw, and the thickness of the two biaxially stretched PET films may be reduced. If the total is too small, the strength required for the lid material to be too small is insufficient, so the total thickness of the two stretched synthetic resin films is about 18 μ to about 8 μ in the experimental results. Similarly, as a result of an experiment, the quality paper such as high-quality paper is preferably about 20 g / m ² to about 200 g / m ² , and imitation paper, single-sided art paper, bleached kraft paper, etc. are preferable in addition to the quality paper.

Example 3 As shown in FIG. 6, biaxially stretched polypropylene (PP) having a thickness of 6 μ was formed on the upper surface of a single-sided art paper 31 having a weight of about 105 g / m ² with an adhesive layer 33 made of polyethylene resin. 2) A film 32 is provided, and a biaxially stretched polyester (PET) film 34 having a thickness of 12 μ is provided on the lower surface of the single-sided art paper 31 with an adhesive layer 35 made of polyethylene resin. This is a container lid 38 in which a heat seal layer 36 of polypropylene (PP) film is provided on the lower surface of the polyester (PET) film 34 via an adhesive layer 37 of polyester resin.

When using the lid 38 of the container of the third embodiment, as shown in FIGS. 7 to 9, coffee 40 is put in a paper container 39, and the lid 38 is placed on the upper opening of the container 39 with a heat shield. The upper layer of the container 39 is sealed by heat-sealing 41 with the rule layer 36, and the cover 42 is placed on the upper side of the container 39. The cover 42 is made of a synthetic resin, and the cover 42 is provided with a straw-shaped cross 43. When the coffee 40 in the container 39 with a lid is heated for drinking, the container 39 with a lid is put in a microwave oven, and the coffee 40 in the container 39 is heated by a microwave oven. After heating the coffee 40 in the lidded container 39 by heating, the straw 44 is pierced into the lid 38 through the straw piercing cross-shaped cut 43 provided in the cover 42, and the coffee 40 heated by the person drinking with the straw 44 is to drink. The straw 44 is a straw whose length is freely expandable and contractable, and it is convenient to temporarily attach the shortened straw to the outer side surface of the container 39 in advance. By covering the upper side of the container 39 with the cover 42, even a child can smoothly pierce the straw along the straw piercing cross-shaped cut 43 of the cover 42 almost vertically, and the lid of the container 39 is free from dust and dirt. Sticking is prevented.

[0014]

[Effect of device]

 The lid of the container of this invention can be easily sealed by heat sealing the opening of the container with a lid, and since a metal foil is not used for the lid, a liquid beverage-filled container sealed with the lid is a microwave oven. It can be heated as it is. Furthermore, since the lid of the container of this invention is protected by thin stretched synthetic resin film on both the upper and lower sides of the paper, there is an effect that the lid does not curl in any direction and that the lid is water resistant.

[Brief description of drawings]

FIG. 1 is a plan view of an embodiment of the present invention.

FIG. 2 is an enlarged sectional view of FIG.

FIG. 3 is a cross-sectional view when in use.

FIG. 4 is an enlarged sectional view of another embodiment of the present invention.

FIG. 5 is a cross-sectional view when drinking.

FIG. 6 is an enlarged sectional view of still another embodiment of the present invention.

FIG. 7 is a cross-sectional view when in use.

FIG. 8 is a plan view during use.

FIG. 9 is a sectional view when drinking.

[Explanation of symbols]

 1 Imitation Paper 2 Stretched Polyester Film 3 Adhesive Layer 4 Stretched Polyester Film 5 Silicon Oxide Vapor Deposition Layer 6 Adhesive Layer 7 Heat Seal Layer 7 ′ Adhesive Layer 8 Container Lid 9 Container 10 Tea Bowl 11 Heat Seal 12 Fine Paper 13 Stretched Polyester Film 14 Adhesive layer 15 Stretched polyester film 16 Adhesive layer 17 Heat seal layer 17 'Adhesive layer 18 Container lid 19 Container 20 Milk drink 21 Heat seal 22 Straw 31 Single-sided art paper 32 Stretched polypropylene film 33 Adhesive layer 34 Stretched polypropylene film 35 Adhesive layer 36 Heat seal layer 37 Adhesive layer 38 Lid 39 Container 40 Coffee 41 Heat seal 42 Cover 43 Cross-shaped cut 44 Straw

Claims (6)

[Scope of utility model registration request] 1. A stretched synthetic resin film having a total thickness of two stretched synthetic resin films of 32 μ to 8 μ is bonded and provided on the upper surface and the lower surface of the paper, respectively. A lid for a container, wherein a heat seal layer is provided on the lower surface of the resin film. 2. One of two stretched synthetic resin films
The container lid according to claim 1, wherein the one is a stretched synthetic resin film having a silicon oxide vapor deposition layer. 3. The heat seal layer is a heat seal layer in which a thermoplastic synthetic resin film is adhered to the lower surface of a stretched synthetic resin film on the lower surface side.
The lid of the described container. 4. The container lid according to claim 1, wherein the two stretched synthetic resin films have the same thickness. 5. The lid of a container according to claim 1, wherein the two stretched synthetic resin films have different thicknesses. 6. The paper has a thickness of 20 g / m ² to 200 g / m ^2.
The lid of the container according to claim 1, wherein the lid is m ² .