JPS5836533Y2 - Laminated film for skin packs - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a laminated film for skin packs.

Films with good gas vanity properties are desirable as films for vacuum skin packs, but conventionally used films include soft polyvinyl chloride/ethylene-vinyl acetate copolymer (hereinafter simply referred to as EVA), ionomer resin, etc. /EVA has poor moldability, and EVA, which is used for low-temperature sealing, has drawbacks such as hygienic problems with oil-based foods, so it is not suitable for skin packs for fresh foods such as ham and meat. When used for this purpose, there were various drawbacks such as poor sealing performance and poor appearance.

As a result of various studies aimed at eliminating the above drawbacks, the inventor of the present invention found that by laminating polybutadiene, gas barrier resin, and polyolefin, good moldability and gas barrier properties were achieved.
The present invention was completed by discovering that a laminated film for skin packs with good properties and excellent low-temperature sealing properties can be obtained.

Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 shows an example of the laminated film of the present invention, and the laminated film 4 is formed by laminating a polybutadiene layer 1, a gas barrier resin layer 2, and a polyolefin layer 3 in this order.

The polybutadiene layer 1 is for providing low-temperature sealing properties to the laminated film A, and therefore, if it is thinner than 10 μm, the effect cannot be sufficiently obtained, and if it is thicker than 100 μm, the moldability of the film will be poor.

The gas barrier resin layer 2 is made of polyvinyl chloride or ethylene-vinyl alcohol copolymer, and needs to have a thickness of at least 5 μm in order to impart gas barrier properties to the laminated film 8. On the other hand, if it is thicker than 30 μm, the stiffness of the film increases. becomes strong, resulting in deterioration of film formability.

Furthermore, the polyolefin layer 3 is used to impart moldability to the laminated film and to protect the gas barrier resin, particularly the ethylene-vinyl alcohol copolymer, from moisture.

A thickness of at least 25μ is therefore required, while
Even if it is thicker than 70μ, the moldability does not change much and the price only increases.

Here, as the polyolefin, ionomer resin, polyethylene, EVA, etc. can be used.

Although not shown, a polyolefin similar to the above is applied between the polybutadiene layer 1 and the gas barrier resin layer 2 to a thickness of 5 to 30 mm in order to improve the adhesion between the two.
It is also possible to intervene in the order of μ.

Further, the laminated film of the present invention is manufactured by a conventional method such as T-die molding or inflation molding.

Next, an example of use of the laminated film of the present invention will be described.

FIG. 2 shows an example in which thinly sliced ham 4 is skin-packed using the laminated film Δ.

In FIG. 2, the ham 4 is placed on the bottom member 5, and the ham 4
The entire top and side surfaces and the exposed portion of the bottom member 5 are skin-packed with a laminated film.

Here, as shown in FIG. 3, which is a cross-sectional end view taken along the line III-III' in FIG. It is preferable to have a structure in which a resin layer 7 is provided, and this resin layer 7 is made of polybutadiene, Ev
A etc. can be applied.

In particular, for laminated film hills, it is desirable to use a bottom member whose surface is coated with polybutadiene.

Examples of the base sheet 6 include polyvinyl chloride, acrylonitrile-butadiene-styrene resin, polystyrene, polyethylene, and polypropylene.

As is clear from the above explanation, the laminated film of the present invention can be used for skin packs, fresh foods such as ham, sausage, meat, fish, and eel, cooked foods such as oil sweets, hamburgers, and gyoza, and foods containing large amounts of oil. It is extremely effective for packaging mechanical parts etc.

[Brief explanation of the drawing]

FIG. 1 is a schematic cross-sectional view showing an example of the laminated film for skin packs of the present invention, FIG. 2 is a perspective view showing an example of use of the laminated film for skin packs of the present invention, and FIG. FIG. 3 is an end view taken along line III'. 1...Polybutadiene layer, 2...Gas barrier-'I bioactive fat layer 3...Polyolefin layer.

Claims (2)

[Scope of utility model registration request] (1) A gas barrier resin layer made of polyvinylidene chloride or ethylene-vinyl alcohol copolymer with a thickness of 5 to 30 μm is laminated on one side of the polybutadiene layer with a thickness of 10 to 100 μm, and Thickness 25-70 on top
A laminated film for skin packs made by laminating μ polyolefin layers. (2) The laminated film for a skin pack according to claim 1, wherein a polyolefin layer having a thickness of 5 to 30 μm is interposed between the polybutadiene layer and the gas barrier resin layer.