JP3082874B2 - Barrier packaging bag - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging bag suitable for long-term storage of foods, pharmaceuticals and the like. More specifically, the present invention relates to a bag formed by laminating a film obtained by evaporating silicon converted from an organosilicon compound on a plastic film in an oxygen atmosphere and a plurality of other films.

[0002]

2. Description of the Related Art Conventionally, a film deposited on a biaxially stretched polyethylene terephthalate film (PET film) having a high heat-resistant temperature by heating and evaporating silicon oxide to a temperature of 1300 ° C. or more under a high vacuum of 10 ⁻⁴ torr or more. When x of SiOx is 1.7 or less, it is colored yellow, but has been used as a packaging bag due to low oxygen permeability. However, when x of SiOx is 1.7 or more, the degree of coloring is low, but the oxygen permeability is high. In particular, when x is 2.0, a colorless and transparent film can be obtained, but the oxygen barrier property is poor and the food is poor. It could not be used as a packaging bag for long-term storage of medicines and drugs.

[0003] In a conventional method of heating and evaporating silicon oxide to deposit it on a plastic film,
Films with low heat resistance other than PET film with high heat resistance due to high vapor deposition temperature, such as biaxially stretched nylon film (ONy film), biaxially stretched polypropylene film (OPP film), cast polypropylene film (CPP film), Linear Low Density Polyethylene Film (LLDPE Film), Low Density Polyethylene Polyethylene Film (LD
It is extremely difficult to perform vapor deposition in the form of SiOx on a PE film, etc., and it is necessary to extremely lower the cooling temperature of the film and terminate the vapor deposition at high speed and in a short time. It is difficult to increase the thickness, and a predetermined barrier property cannot be obtained.
There was no packaging bag containing PP, CPP, LLDPE, LDPE or the like as a part of the constitution.

[0004]

[Problems to be Solved by the Invention] That is, SiOx
(X = 1.7 to 2.0) is intended to obtain a vapor-deposited film having good barrier properties to provide a packaging bag. It is another object of the present invention to provide a vapor deposition method which can be applied to a material having relatively low heat resistance by low-temperature vapor deposition.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to provide an SiOx
Of x is 1.7 to 2.0 and 100 to 2000
Put food, beverages, and pharmaceuticals in a packaging bag with excellent gas barrier and water vapor barrier properties, using a transparent and nearly colorless plastic film deposited in a thickness of Å as a part of the composition, and sealing the contents. Quality is to be maintained for a long time.

According to the present invention, plasma-generated silicon is generated from an organosiloxane under a vacuum of 10-3 to 10-4 torr, and oxygen is generated in an oxygen atmosphere at an atmosphere temperature of 0.
At 100 ° C to 100 ° C, nylon, polypropylene,
SiOx on plastic film such as polyethylene
In the form of x is 1.7 to 2.0 and 100 to 20
Food, beverages, pharmaceuticals, precision electronic parts, precision mechanical parts, etc. are sealed in a packaging bag with a barrier film deposited to a thickness of 00 mm as a part or all of the composition, thereby maintaining the quality of the contents for a long time. The feature is that.

[0007] The plastic film in the present invention refers to a plastic film that has not been stretched or has been stretched uniaxially or more, and includes polyester, polyamide, polypropylene, polyethylene, polystyrene, polycarbonate, polyethylene vinyl alcohol copolymer, and polyethylene vinyl acetate copolymer. , Polyvinyl alcohol, cellophane, ionomer, polyvinyl chloride, polyvinylidene chloride, polyacrylonitrile, silicon,
Polybutylene, polyisoprene, polymethylpentane,
It includes a copolymer of polypropylene and olefins, a copolymer of polyethylene and olefin, and the like, except for biaxially stretched polyethylene terephthalate film, which has conventionally been extremely difficult to deposit SiOx. In the present invention, the packaging bag having a part or the whole of a plastic film on which SiOx is deposited is, for example, SiO2.
_1.8 LLDPE film alone by the packaging bag has been deposition, the LLDPE film of SiO _1.8 is deposited 2
Sheets, packaging bag laminated with SiO _1.8 evaporation surface, ONy
Laminated packaging bag with CPP films film and SiO _2.0 was deposited, laminated bags OPP film and the CPP SiO _2.0 is deposited, laminated bag of ONy film and LLDPE films SiO _1.8 is deposited, PET film and SiO Includes three laminated bags of ONy and CPP with _1.8 deposited. Next, the present invention will be described with reference to examples.

Example 1 Dimethylsiloxane was used as a raw material and the degree of vacuum was 10-2 to
rr, a plasma of silicon is generated at a temperature of 25 ° C., and SiOx is formed on each of the following films in an oxygen atmosphere.
Was deposited in the form of x = 1.8. Table 1 shows the results. Comparative Example, Levold's EB gun heating system vacuum deposition machine using SiO as a raw material and a degree of vacuum of 10-4 to
rr at the next film in an oxygen atmosphere,
Table 2 shows the oxygen permeability and the water vapor permeability in the case of vapor deposition in the form of iO1.8. Table 3 shows oxygen permeability and water vapor permeability of each film before vapor deposition.

Example 2 50 μl of SiO _1.8 was added to the 40 μL LLDPE of Example 1A.
Seasoned paste was wrapped around the film deposited at 0 ° and heat sealed on four sides. This is placed in a room at a temperature of 30 ° C and a humidity of 95% for 30 minutes.
After leaving for days, the seasoned paste after opening was kept in a dry state and had a good texture. 40μ LLD for comparison
When the seasoned paste was packaged in PE and left in a room at a temperature of 30 ° C. and a humidity of 95% for 30 days, the paste was moist and the texture was poor.

EXAMPLE 3 500 μm of SiO _1.8 was added to the 40 μm CPP of Example 1B.
Two vapor-deposited films were laminated with an adhesive so that the SiO _1.8 surfaces were aligned. Lowering the film is to be laminated in the form of defect surfaces were offset of SiO _1.8, the oxygen permeability of 0.1cc / m ² · 24hrs or less, water vapor transmission rate to less than 0.1g / m ² · hrs did. This film was wrapped with a seasoned paste in the same manner as in Example 1, and the four sides were heat-sealed and left in a room at a temperature of 30 ° C. and a humidity of 95% for 60 days. After opening, the seasoned paste remained dry. The texture was good. For comparison, a 80 μm thick CP
Package the seasoned paste on P film, temperature 35 ° C, humidity 95
% Was left in the room for 60 days, the paste became moist and the texture was poor.

Embodiment 4 450 ° S was added to the 20 μm OPP film of C of Embodiment 1.
Wrap the potato chips in a film laminated with a film on which iO _1.8 was deposited and a film of 40 μm CPP film.
Was heat sealed. For comparison, potato chips were wrapped in a film obtained by laminating a 40 μm CPP film on a 20 μm OPP film, and heat sealing was performed on four sides. Both were left in a room at 25 ° C. and 80% humidity for 3 months, but the aroma and dry state of the potato chips packaged in the bag of the example were maintained and the texture was good. The potato chips of the comparative example had a slightly oxidized smell, a poor dry state, and a poor texture.

Example 5 A 15 μm ONy film of D of Example 1 was subjected to 550 ° S.
40 μm on a film deposited with iO _1.8 to a thickness of 550 °
A potato chip was wrapped in a film laminated with LLDPE, and heat sealed on four sides.
For comparison, potato chips were wrapped in a film obtained by laminating 40 μL LLDPE on 15 μ ONy, and heat sealed on four sides. Both were left in a room at 25 ° C. and 80% humidity for 2 months, but the potato chips packaged in the bag of the example had good aroma and dryness, and good taste. The potato chips of the comparative example had a slightly worse fragrance, were in a moisture-absorbed state, and had a poor texture.

Example 6 The 12 μm thick OPET film of E of Example 1 was made of SiO
Two films on which _1.8 was deposited at 600 ° were laminated with an adhesive so that the SiO _1.8 surfaces were aligned. The film was further laminated with a 80 μm thick CPP for retort. The oxygen permeability of this laminated film is 0.1 cc / m ²
・ 24 hrs or less, water vapor permeability is 0.1 gcc / m ²
-It was 24 hours or less. The laminate film was heat-sealed on three sides to form a bag, beef stew was put in, and the opening was heat-sealed, followed by retort sterilization at a temperature of 121 ° C. for 30 minutes. 40%, 65%
After being left in a humidity room for 6 months, the taste did not change even after being left and was extremely good. For comparison, beef stew was placed in a pouch laminated with two 12 μm OPET films and 80 μCPP for retort, and the same retort treatment was performed. Those left under the same conditions were oxidized and changed in taste after being left. And could not be served as food. The enzyme permeability and the water vapor permeability were measured using OX-TRAN100 manufactured by Modern Controls.

[0014]

As described above, according to the present invention, the composition of SiOx (x = 1.7 to 2.0), which was impossible in the prior art,
In addition, it can be seen that the film can be deposited at a low temperature and thus is extremely effective as a barrier packaging material and a packaging bag.

[0015]

[Table 1]

[0016]

[Table 2]

[0017]

[Table 3]

Claims (1)

(57) [Claims] 1. An organosiliconization on a plastic film
Using the compound as a raw material , SiOx (x = 1.7 to 2.0)
A barrier packaging bag having a small gas permeability and a small water vapor permeability, comprising a part or the whole of a film having a composition of 100 to 2000 mm and having a thickness of 100 to 2000 mm.