JP2001146273A - Gas replaced packaging body for deep drawing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gas replaced packaging body for deep drawing, of which the appearance at a store is favorable even when the thickness becomes thin. SOLUTION: For this gas replaced packaging body for deep drawing, a lid member 4 made of a multi-layer material, and a container main body 1 made of a multi-layer material which has a depth of 35 mm or less are sealed, and the inside of the packaging body is replaced with a gas. In such a gas replaced packaging body for deep drawing, the cross sectional shape at four corners of the bottom section of the container main body is 8 to 50 R in the outward direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deep-drawing gas replacement package for packing ham sausage, side dishes, etc., which is an environmentally friendly package which can increase the commercial value at stores and reduce the amount of packaging material. It is.

[0002]

2. Description of the Related Art Conventionally, as a package for packaging ham sausage, side dishes, etc., vacuum packaging by a deep drawing packaging machine has been generally employed, but in recent years, as shown in FIG. After filling the contents (2) into (1) and evacuating, the gas is replaced by an inert gas (3) such as N ₂ or CO ₂ and the film-like lid material (4) is sealed. Packaging (gas pack) has been increasingly used. However, current gas packs have problems such as the container body being deformed and being difficult to be restored, resulting in reduced commercial value at stores. In order to solve these problems, among the multilayer materials of the container body, a layer having rigidity in the main structure, for example, a layer of polyester, styrofoam, or the like is thickened, or a rib is formed to give rigidity to the container body. Has been commercialized by means capable of preventing the deformation. However, these use only a large amount of packaging materials and go against the current environmental problem, that is, the theme of how to reduce the amount of packaging materials. In addition, there are problems such as poor workability during deep drawing and an increase in packaging cost.

[0003]

SUMMARY OF THE INVENTION The present invention has been made to solve these problems. By examining the shape of the container body and the ratio of each component of the multilayer material, it is possible to reduce the thickness without increasing the thickness. This provides an environmentally friendly package without losing the commercial value at the store.

[0004]

SUMMARY OF THE INVENTION The present invention relates to a deep drawing method for sealing a lid made of a multilayer material, a container body made of a multilayer material having a depth of 35 mm or less, and replacing the package with gas. In the gas replacement package, the cross-sectional shape of the bottom four corners of the container body is 8 to 50R in the outward direction, and is a deep drawing gas replacement package. Preferably, the bottom four corners of the main body container are flat surfaces, and the container body made of a multilayer material has a polyester resin layer having a thickness of 10 to 50% of the total thickness. Thickness 150
The deep-drawing gas replacement package having a thickness of about 250 μm. Preferably, the multilayer material of the main body container is manufactured by a co-extrusion method, and the inner size of the flange portion shape of the container body is 200 mm in length.
mm or less and 150 mm or less in width.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION The container body used in the present invention is made of a multi-layer sheet having a function of rigidity, pinhole resistance, gas barrier property, sealing property and the like, preferably 150 to 350 μm, more preferably 150 to 250 μm. can get.
Rigidity functions include polyester (PET), nylon (NY), polystyrene (PS), and polypropylene (P
The resin layer such as P) has a pinhole resistance function, and the resin layer such as various nylons (NY) and ionomers (IN)
As the gas barrier function, saponified ethylene-vinyl acetate copolymer (EVOH), vinylidene chloride (PVDC), NY
A resin layer such as polyethylene (PE), PP, ethylene-vinyl acetate copolymer (EV
A), a mixture of these resins, a resin layer such as a mixture having an easy peel function, and various resin layers according to other necessary functions, such as a constitution, an arrangement order, a thickness, etc., are combined to form a co-extrusion method, a dry lamination method. , An extrusion lamination method, a method based on a combination thereof, and the like, but a co-extrusion method in which the adhesive layer has flexibility is preferable. Further, in each structure, PET which is relatively insensitive to temperature and humidity in terms of rigidity and transparency is included, and its thickness is preferably 10 to 50% of the total thickness of the multilayer material. When the PET thickness is less than 10%, the rigidity is lost and the main container is easily deformed.
When displayed in a chilled state at ℃, there is no restoring force in a decompressed state and the product value is lost when stacked, and when it exceeds 50%, the rigidity becomes too large and a rib effect occurs when deformed, and it does not recover Worse. Here, the position of PET is preferably the outermost layer of the main container in consideration of the balance between transparency and rigidity. The multilayer material used here must have good formability in a deep drawing gas displacement packaging machine. As a preferred combination, PET /
EVOH / NY / EVA. In recent years, there has been a demand for a direction in which the thickness of the multilayer material is reduced due to environmental and price issues, and a thickness of 150 to 200 μm is required.

As shown in FIGS. 1 and 2, the shape of the container body used in the present invention has a depth (11) of 35 mm or less and four bottom corners (5), (6), (7), (8). ) Is 8 to 50R (circle with a radius of 8 to 50 mm), preferably 30 to 40R (circle with a radius of 30 to 40 mm) in the outward direction. In this case, since the four corners have appropriate rigidity with a restoring force, even if the inside of the package is in a chilled state of 4 to 5 ° C. and the inside of the package is in a reduced pressure state, the lid material (4)
Is slightly deformed inside, but there is no deformation of the container body (1),
Product value does not decrease even if it is piled up at stores. 8R
If it is less than 4, the thickness of the four corners at the bottom becomes too thin, and the restoring force at the time of deformation is lost. If it exceeds 50R, not only does the capacity of the contents change, but also the design at the store deteriorates.

It is preferable that there are no steps due to ribs or thickness variations near the bottom four corners (5), (6), (7), and (8) of the container body used in the present invention. If there is a rib, the rib effect deforms inward during decompression and does not restore. When the thickness variation is large, the thin portion is deformed inward at the time of decompression and is not restored, thereby deteriorating the commercial value at the store.

[0008] The shape of the flange portion of the container body used in the present invention has a vertical dimension (9) within 200 mm and a horizontal dimension (10) 150 mm.
mm or less, and if it is more than 1 mm, the bottom side (1
2), (13), (14), and (15) are too long for the package, and are deformed inward when decompressed in a chilled state, and do not restore, resulting in poor commercial value at the store. More preferably, the height is 160
mm, 130 mm or less in width.

The cover (4) employed in the present invention includes:
Generally 50-200μ thick used for deep drawing packaging machine
m, preferably 70 to 130 μm, but can be changed according to the shape and thickness of the main container (1). In addition, functions such as heat resistance, gas barrier properties, heat sealing properties, and rigidity are required. The gas barrier function is EVOH, PVDC, NY, various kinds of vapor deposition, the rigidity and heat resistance function is stretched PP, PET, NY, styrene (PS), etc., and the sealing function is PE, P.
P, EVA, a mixture of these, and various other resin layers according to a required function, such as a dry lamination method, a co-extrusion method,
Extrusion lamination method It can also be obtained by a combination of these methods. In addition, an easy peel function can be provided together with the sealing function, and a known technique such as cohesive peeling, interfacial peeling, or interlayer peeling can be employed as necessary. Since these lids are used in the form of a film, there is almost no variation in thickness. A preferred configuration is that each layer of the stretched PP / alumina-evaporated stretched PET / EVA-based easy peel seal layer is laminated by dry lamination from the outside of the package.
VOH / NY / EVA is laminated by a dry lamination method.

[0010] The contents of the present invention will be explained along the steps.
A multilayer material is formed by a deep drawing forming machine to obtain a container body (1). Then filling contents (2) to the body vessel, after degassing the air was evacuated and replaced with an inert gas such as N _2, CO ₂ (3), sealed with a film-like lid (4) The package is completed. At this time, the temperature of the replaced gas is generally room temperature, but the temperature of the contents and the store temperature are in a chilled state. The pressure is immediately reduced according to Charles's law. Here, the replacement ratio of the inert gas (3) is preferably as high as possible, and is generally 80 to 99.9%. or,
Types of inert gas N ₂ or N ₂ gas pressure of often mixed gas is employed but the packaging body ratio of CO ₂ is large in CO ₂ tends variation, thus N ₂ alone or CO ₂ is 20
% Or less is preferable. ADVANTAGE OF THE INVENTION According to the deep-drawing gas replacement package by this invention, thickness reduction of a main body container is possible, without reducing the commercial value at a store, the amount of packaging material can be reduced, and it becomes possible to respond to environmental problems.

Example 1 A total thickness of 2 was obtained by a co-extrusion method.
00 μm, PET thickness is 20 μm, PET / EV
Manufacture multilayer material of OH / NY / EVA structure, PET
With the layer on the outside, a deep drawing gas replacement packaging machine of FV-6300 manufactured by Omori Machinery Co., Ltd. is used. The depth is 20 mm, the inner size of the flange is 150 mm in length, the width is 110 mm, and the cross-sectional shape of the bottom four corners is 30R outward. A stepless sliced ham gas pack container was formed. Then 150 sliced ham
g, the atmosphere was replaced with N ₂ gas, and completely sealed with a 112 μm stretched PP / alumina-deposited PET / easy peel sealant film having a dry-laminated layer between the layers as a cover material. After that, when left in an atmosphere of 4 ° C. for 1 hour, the lid material was slightly deformed inward, but the main container was hardly deformed, and a package having no problem in appearance could be obtained. In addition, although they were stacked in a chilled store, they did not change at all and did not impair the commercial value.

<Comparative Example 1> In the shape of the container body of Example 1, a package was obtained under the same conditions as in Example 1 except that the shape of the container had steps with two ribs at the four bottom corners.
When evaluated under the same conditions as above, the bottom four corners were deformed inward and did not restore, and the appearance was poor and the product was not obtained. << Comparative Example 2 >> In Example 1, the total thickness was 300 μm and P
Using a multi-layered material having a thickness of 250 μm of ET, the shape of the container main body was made to have a step with two ribs at the four bottom corners, and all other conditions were the same as in Example 1 to obtain a package, and evaluated similarly. As a result, although the lid material was slightly deformed, the container body was hardly deformed, and a package having no problem in appearance could be obtained. << Comparative Example 3 >> In Example 1, a multilayer material having a total thickness of 200 μm and not including a PET layer, having a structure of PP / EVOH / NY / EVA, was used, this sheet was used, and all other conditions were the same as in Example 1. Was obtained and evaluated. As a result, the container body was deformed by the decompression, and was not restored, and had no commercial value. << Comparative Example 4 >> A package was obtained under the same conditions as in Example 1 except that only the inner dimension of the flange shape of the container body was changed to 220 mm in length and 150 mm in width, and evaluated. As a result, the bottom side of the container body is bent inward and deformed,
There was no commercial value. << Comparative Example 5 >> A package was obtained and evaluated under the same conditions as in Example 1 except that a multilayer material in which each layer in Example 1 was manufactured by a dry lamination method was used. As a result, the container body was slightly deformed inward and did not recover, and the commercial value was not so good.

[0013]

According to the present invention, in a deep-drawing gas replacement package for packaging ham sausage, side dish, etc.,
Even if the container body is thinned, it is possible to obtain a package that is hardly deformed and does not lose its appearance at the store.
As a result, the amount of packaging material can be reduced.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view of a package of the present invention.

FIG. 2 is a schematic view of a container body of the package of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Container main body 2 Contents 3 Inert gas 4 Lid material 5, 6, 7, 8 Four bottom corners of container main body 9 Vertical dimension of flange shape 10 Horizontal dimension of flange shape 11 Depth of container main body 12, 13, 14 , 15 Container body bottom wall

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3E033 AA10 BA17 BA18 BA21 BA22 BB08 CA05 CA06 DA08 FA04 3E067 AA11 AB01 AB05 AB06 BA02A BB14A BB25A BC07A CA04 CA17 EA06 EA35 EE09 GA19 GD02 GD10

Claims (6)

[Claims] 1. A deep drawing gas replacement package formed by sealing a lid member made of a multilayer material and a container body made of a multilayer material having a depth of 35 mm or less and replacing the inside of the package with a gas. A deep drawing gas replacement package, wherein the bottom four corners of the main body have a cross-sectional shape of 8 to 50 R in an outward direction. 2. The gas replacement package for deep drawing according to claim 1, wherein the four bottom corners of the main body container are surfaces having no steps. 3. The container body made of a multilayer material has a total thickness of 1%.
3. The deep-drawing gas replacement package according to claim 1, which has a polyester resin layer having a thickness of 0 to 50%. 4. The total thickness of a container body made of a multilayer material is 1
The gas replacement package for deep drawing according to claim 1, wherein the thickness of the package is 50 to 250 μm. 5. The deep-drawing gas replacement package according to claim 1, wherein the multilayer material of the main body container is manufactured by a co-extrusion method.
Packaging. 6. An inner dimension of a flange portion shape of a container main body is vertical 2
The gas drawing package for deep drawing according to any one of claims 1 to 5, wherein the package is within 00 mm and within 150 mm in width.