Layered product for packaging

Abstract

A packaging material being a laminate formed by an outer layer comprising a laminated film which in turn is constituted by a cellophane sheet and easy-to-cut plastic film, and an inner layer comprising hot-melt material coating, wherein said packaging material allows for easy manufacturing control and storage control and offers good cutting properties in all directions when cut while a block of cheese or other food is packaged inside.

Description

TECHNICAL FIELD[0001]The present invention relates to a layered product for packaging which is suitable for contact packaging of food items that are cut into pieces with a knife, such as block-shaped cheese or cakes of sweet bean jelly or rice powder jelly.[0002]The present invention also relates to a layered product for packaging having good cutting property where it can be cut into pieces with a knife in any direction.[0003]To be more specific, the present invention relates to a layered product for packaging characterized in that it is formed by an outer layer comprising a laminated film which in turn is constituted by a cellophane sheet and easy-to-cut plastic film, and an inner layer comprising hot-melt material.[0004]It should be noted that, in this context of the present invention, the “inner layer” refers to the layer on the side that comes in contact with food, while the “outer layer” refers to the layer on the side which is exposed to the exterior.PRIOR ART[0005]Conventiona...

AI Technical Summary

Benefits of technology

[0018]The layered product for packaging proposed by the present invention maintains good cutting property in all directions when cut with a knife, while undergoing little thermal shrinkage or breaking during the manufacture of packaging material and also offers a good anti-pinhole property, because said packaging material is made by using a cellophane sheet as the base material and laminating this base material with an easy-to-cut plastic film.

[0019]In addition, the present invention does not require use of cornstarch, which in turn makes it easy to implement quality control of the packaging material, eliminates the need for refrigeration during storage, and consequently improves the efficiency of production.

[0020]In view of the improved physical properties mentioned above, the packaging material proposed by the present invention is the most suitable for block-shaped cheese and other similar food items because it can reduce the probability of development of pinholes while offering good cutting property in all directions when cut with a kitchen knife or a pocketknife.

Problems solved by technology

These packaging materials constituted by a single wax-coated cellophane layer offer good contact property with food, but they are likely to develop pinholes if a severe impact is applied to them during transportation.

Aluminum foil laminated plastics also have other problems, such as metal detectors not functioning favorably in the manufacturing process.

On the other hand, use of a plastic film partially or entirely over these packaging materials to prevent the aforementioned problems causes a new set of problems that include loss of cutting property when cut with a knife and consequent loss of product value.

As a result, the viscosity on the coated side becomes higher than necessary and if these packaging materials are stored in rolls at normal temperature the film itself tends to undergo blocking before use, and therefore there is a problem in handling these packaging materials prior to their use.

However, the use of cornstarch on the surface of packaging material causes a problem of powder scattering while manufacturing, making process control difficult.

On the other hand, an attempt to apply a thin coat of thermal melting wax to prevent film blocking causes the packaging material to shrink due to the heat in the wax application process.

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