JPS5830956A - Vessel with sealing cover - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a novel container with a seal lid that not only has sufficient sealing performance but also has good peelability when the seal lid is released.

The main body of the container is made of a paper-based material with polyethylene film laminated on both sides and has seven outwardly protruding flange at the opening, and the opening is made of aluminum film, etc.) Seal WI with polyethylene film laminated on one side of the constructed jar main body
Containers sealed by NK are known.

This paper-based container with a seal lid has the advantage of being able to be provided at low cost, and many products are on the market. The seal lid was strongly adhered to the main opening of the container. the result,
Not only did strong force be required to peel off the seal when opening the lid, but when the container was peeled off, the polyethylene film on the top surface of the container was peeled off from the paper base, causing the opening edge of the container to It looked fluffy and I didn't like it.

In view of the above points, the present invention has a sealing property sufficient to maintain a sufficient sealing property, and also has good peelability when opening the seal lid, and prevents paper fiber fuzz from forming at the opening of the container. It was created with the aim of eliminating the need for waste, and is made of a material consisting of a paper base and a polyethylene film laminated on the surface, and the main body is a pot-shaped container with seven flange extending around the opening edge. , a container with a seal lid in which a polyethylene film is laminated on the surface of a lid main body such as an aluminum film, and a container with a seal lid in which the seal lid is heat-sealed to an opening of the container main body, the container having a polyethylene film as the main body of the container. Using polyethylene with relatively high density, high softening temperature, and low MI (melt index), J1. In addition, we use polyethylene with low density, low softening temperature, and high MI (melt index) for the polyethylene film of the seal lid, so that when the seal lid is bonded, the polyethylene film that is the main part of the container does not completely melt, and the polyethylene film that is the seal can be loosened. The seal lid is heat-sealed to the opening of the main body of the container by melting the container.

The present invention will be described in detail below with reference to embodiments shown in the drawings.

In the figure, 1 is the main body of the container, and like the well-known cup-shaped container, the base material is 0 paper 2, and polyethylene film 3.
3 is made of laminated material, and the legs and opening part 4
It has an overhanging furanone 5 around its periphery. 6 is the bottom plate of the container, which is also made of paper laminated with polyethylene film. Next, numeral 7 is a sealing lid, and the lid main body 8 is made of an aluminum film like the well-known sealing lid, and the surface of the lid main body 80 is covered with a polyethylene film 9.
It is laminated.

In the present invention, the polyethylene film 3 of the container main body 1 has a relatively high density and a high softening temperature.

Polyethylene 1 with low MI (melt index) is used, while polyethylene film 9 of seal lid 7 is used.
The foot and seal lid are made of polyethylene with low density, low softening temperature, and high MI (melt index).
When the polyethylene film 3 of the container main body 1 is completely melted in the state of adhesion to the container opening 4, that is, the overhanging flanone 5, it is 17 times.

The seal IkT is heat-sealed to the container body 1 by melting the polyethylene film 9 of the seal ik7.

As mentioned above, the polyethylene film 3 of the container main body 1 is made of a material with high density and a high softening temperature (low MI), while the polyethylene film 9 of the seal Ii7 is made of a material with a low density,
The polyethylene film 9 of the seal lid is bonded under heat sealing conditions sufficient to melt the polyethylene film 9 of the seal lid. Sufficient sealing performance is obtained by the melt-adhesive action, and the polyethylene film 3 of the container main body 1 is not completely melted and is not destroyed by heat.Therefore, the polyethylene film 3 of the container main body 1 can maintain approximately its original shape. When peeling off the seal jar 7, the polyethylene of the seal lid adhered to the overhanging edge 5 of the container body 1 will separate from the seal lid. Therefore, when the sealing lid has good beer properties, the polyethylene film 3 of the container main body 1 remains as it is on the stretched flanone 5, and as a result, when the sealing lid T is peeled off.

The opening edge can be kept beautiful without the fibers of the paper 2, which is the base material of the container main body 1, becoming fluffy.

The experimental results will be described below. In this experiment,
: Pressure of F7 Lutzer 6KP/Cm, inner diameter of air cylinder 32■, calculated seal pressure dg, 2! ;Kl,
Using experimental equipment with actual estimated sealing pressure lI/~'I 3 K9, set sealing time about 7 seconds.

The setting sealing temperature was changed stepwise from 100°C to 1sooC. In this experiment, first, tests were also conducted on polyethylene films mainly used for containers, which are not included in the present invention, that have a relatively low density and a relatively low softening temperature (and nx).

The effect of the present invention was clarified in comparison with that.

Actual IK I) In this experiment, 1. Low density of 0910~υ9koda, low softening temperature qooc of 9S℃, Ml '7~g
The polyethylene film used as the main material for containers has a relatively low density of 0.920-0.92 da, and a relatively low softening temperature of 93°C to 93°C.
I used the one from M-work 3.

As a result, sufficient sealing performance was observed when the sealing temperature was higher than 20°C, and good beer properties were not achieved unless the sealing temperature was lower than 20°C. Moreover, if the temperature is higher than s-concentration/lS°C, the polyethylene film will peel off from the paper base material.

Fluff was observed.

Therefore, under the above conditions, no good results were obtained at all.

Experiment (II) In this experiment, the polyethylene film for the seal lid was the same as that used in the above demonstration (2), and the polyethylene film for the main body of the container had a relatively high density of 0.93-0.
9 and has a relatively high softening temperature lOO℃~lθS
℃ and MXλ were used.

As a result, sufficient sealing performance was observed when the sealing temperature was 130°C or higher, and good beer properties were observed when the sealing temperature was lower than 4tO°C. I was not able to admit.

Therefore, under the above condition d, C/L-temperature is /
Good results were obtained at temperatures of 30°C to /'70°C.

[Brief explanation of the drawing]

WJrIIj is a cross-sectional view of the container with a seal lid of the present invention, showing the container body and the seal amount separately and with a portion cut away. 1... Container main body, 2... Curved Rigi, 3 Four pieces... Polyethylene film, 4...
...Song...M opening, 5...Mountain curve extension 7/J, 7...4...Seal lid, 8...Aluminum film surrounding the four sides, 9.・・River…−Bo9 Ethylene film

Claims (1)

[Claims] It is composed of a paper-based material with two polyethylene films laminated on its surface.The main body is a cup-shaped container with flanone extending over the opening edge, and the main lid is made of aluminum film.A polyethylene film is laminated on the surface of the main body. A container with a seal lid, in which the seal lid is heat-sealed to the opening of the main body of the container, and the polyethylene film of the main body of the container has a relatively high density, a high softening temperature, and a high Mx (melt index). By using low polyethylene, and using polyethylene with low density, low softening temperature, and high Mx (melt index) for the sealing amount polyethylene film, the polyethylene film that is the main component of the container will not completely melt when the seal lid is bonded. A container with a seal lid, characterized in that the seal lid is heat-sealed to the opening of the main body of the container by melting a sealing amount of polyethylene film.