JP2002240848A - Wrap film for packaging food - Google Patents

Abstract

PROBLEM TO BE SOLVED: To safely and sufficiently prevent generation of oxidizing odor (smell) in a wrap film for packaging the food in which polyolefine synthetic resin contains fatty acid esters of fatty polyhydric alcohol. SOLUTION: The wrap film for packaging the food containing 90-99.1 pts.wt. polyolefine synthetic resin and 0.1-10 pts.wt. fatty acid esters of fatty polyhydric alcohol further contains one or two or more kinds of vitamins E selected from the group comprising α, β, γ and δ tocopherol and α, β, γand δ-tocotrienol at the concentration of 50-500 ppm. Generation of oxidizing odor is suppressed, and the wrap film for packaging the food which is formed of polyolefine synthetic resin with high safety can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a wrap film for food packaging. In particular, the present invention relates to a wrap film for food packaging, which contains fatty acid esters of an aliphatic polyhydric alcohol to impart tackiness or flexibility. More specifically, the present invention relates to a food packaging wrap film containing fatty acid esters of aliphatic polyhydric alcohol to impart tackiness or flexibility, and further containing vitamin E to impart antioxidant properties. About.

[0002]

2. Description of the Related Art Polyhydric alcohols such as glycerin and sorbitan and oleic acid and lauric acid are used to impart tackiness or a soft texture to food packaging wrap films made of polyolefin-based synthetic resins such as polyethylene. And the like. However, the fatty acid esters of these aliphatic polyhydric alcohols are apt to be oxidized by light or temperature and easily produce a specific oxidizing odor (bad odor), which may cause an odor of the food packaging wrap film. In addition, due to the nature of a product such as a food packaging wrap film, no odor should be generated, which would result in practical use of the product.

[0003]

Generally, antioxidants for plastics include 2,6-di-tert-butyl-p-type.
Cresol (BHT), tetrakis- [methylene-3-
(3′5′-Di-t-butyl-4′-hydroxyphenyl) propionate] Phenols such as methane are known. Although a series of these compounds has been approved by the FDA and its safety has been confirmed, particularly high safety is required for use in wrap films for food packaging, which often have direct contact with foods. It is necessary to select a particularly suitable one.

[0004] As antioxidants which can be used for foods because of their high safety, natural vitamins A and C have also been proposed. However, vitamin A
In the case of Vitamin C, there is a problem of discoloration of the film. In the case of Vitamin C, which is a water-soluble vitamin, there is a problem of compatibility with polyolefin-based synthetic resin and fatty acid esters of aliphatic polyhydric alcohol, which are base materials Therefore, the antioxidant effect and the influence on the film appearance are concerned.

Accordingly, an object of the present invention is to safely and sufficiently prevent the generation of oxidizing odor (bad odor) in a food packaging wrap film comprising a polyolefin synthetic resin containing fatty acid esters of aliphatic polyhydric alcohol. That is.

[0006]

The present inventors have conducted intensive studies to solve the above-mentioned problems, and as a result, have found that 90 to 99.9 parts by weight of a polyolefin-based synthetic resin and 0.1% by weight of fatty acid esters of aliphatic polyhydric alcohol. In a food packaging wrap film containing 1 to 10 parts by weight, α, β, γ, and δ-tocopherol, and α, β, γ, and δ-
By containing one or more vitamin Es selected from the group consisting of tocotrienols at a concentration of 50 to 500 ppm, a wrap film for food packaging that can safely and sufficiently prevent the generation of oxidative odor (bad odor) is obtained. It was found that it could be obtained. In the present invention, α, β, γ, and δ-tocopherol, and α, β, γ, and δ-tocotrienol containing one or more vitamin Es selected from the group consisting of: This is not for preventing the polyolefin-based synthetic resin as the base material from being oxidized, but for preventing the oxidation of fatty acid esters of aliphatic polyhydric alcohol contained for imparting tackiness or flexibility, and for preventing the generation of oxidized odor associated therewith. Vitamin E such as α, β, γ, and δ-tocopherol, and α, β, γ, and δ-tocotrienol are used as food additives in order to prevent oxidation of fatty acid esters of aliphatic polyhydric alcohols. Although used, it is not known to be applied to food packaging wrap films.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION A wrap film for food packaging according to the present invention is a polyolefin synthetic resin 90 to 9 as a base material.
A food packaging wrap film containing 9.9 parts by weight and 0.1 to 10 parts by weight of fatty acid esters of aliphatic polyhydric alcohols as an adhesive or a softener, and α, β as antioxidants , Γ, and δ-tocopherol,
And one or more vitamin Es selected from the group consisting of α, β, γ, and δ-tocotrienol
It is contained at a concentration of 0 to 500 ppm.

When the content of the fatty acid ester of the aliphatic polyhydric alcohol is 0.1 to 10 parts by weight, if it is less than 0.1 part by weight, the function as a pressure-sensitive adhesive or a softening agent is sufficient. When the amount is less than 10 parts by weight, the stickiness becomes too strong to be suitable as a wrap film for food packaging. And one or more vitamin E selected from the group consisting of α, β, γ, and δ-tocopherol, and α, β, γ, and δ-tocotrienol.
The concentration of the species was 50 to 500 ppm,
If less, the antioxidant effect is not sufficient, and
If it exceeds m, not only the increase in the antioxidant effect is not so much increased with respect to the added amount, but also the performance as a food packaging wrap film may be adversely affected.

The food packaging wrap film of the present invention is composed of a single layer or a multilayer of two or more layers, and has a total thickness of 8 μm.
Preferably, the total thickness of each layer is within this range even in the case of a multilayer structure. When the thickness of the film is within this range, the film has excellent strength and stiffness, has good handleability of the film, and has excellent cutting properties and packaging suitability.

[0010] The material of the food packaging wrap film of the present invention is a polyolefin synthetic resin such as a polyethylene resin or a polypropylene resin. In the case of a multilayer, different types of synthetic resins may be used for each layer. Some of the layers may not contain fatty acid esters of aliphatic polyhydric alcohols or vitamin Es.

The aliphatic polyhydric alcohol in the fatty acid ester of the aliphatic polyhydric alcohol used in the food wrap film of the present invention includes, for example, glycerin, polyglycerin, sorbitan, pentaerythritol, propylene glycol, polyethylene glycol and the like. But preferably glycerin, polyglycerin, sorbitan or polyethylene glycol. Examples of the fatty acid include lower fatty acids such as acetic acid;
And higher fatty acids having 12 to 22 carbon atoms such as oleic acid, linoleic acid and lauric acid.

The following are specific examples of such an ester. For example, monoglycerides such as glycerin oleate; acetylated monoglycerides such as glycerin diacet monooleate, glycerin diacet monolaurate, glycerin diacet monopalmitate, glycerin monoacetomonopalmitate, glycerin monoacetomonooleate, glycerin monoacetomonocaprate; glycerin Acetylated diglycerides such as monoacetodiolate and glycerin monoacetodilaurate; medium chain aliphatic triglycerides having an acyl group having 8 to 12 carbon atoms; polyglycerin fatty acid esters such as diglycerin laurate and diglycerin laurate; Pentaerythritol fatty acid esters such as erythritol oleate; propylene glycol fatty acid esters such as propylene glycol oleate; polyethylene Polyethylene glycol fatty acid esters such as glycol oleate and the like. These esters may be used alone or in combination of two or more.

[0013] The food packaging wrap film of the present invention includes:
If necessary, one or more kinds of various additives such as a stabilizer, a filler, an antifogging agent, and a pigment can be contained.

[0014]

Next, the present invention will be described in more detail by way of examples, which should not be construed as limiting the present invention.

Example 1 A resin composition comprising 98 parts by weight of low-density polyethylene resin (A) (Sumikacene CE3506 manufactured by Sumitomo Chemical Co., Ltd.), 2 parts by weight of diglycerin oleate (B), and 250 ppm of vitamin E was used to obtain a 50 mm diameter. , L / D is 3
The mixture was melt-kneaded at 280 ° C. using an extruder of No. 2 and guided to a T-die (die temperature: 280 ° C.) to have a film thickness of 12 μm.
And cooled with a chill roll cooled to 30 ° C., and slit to a width of 300 mm to obtain a single-layer film.

Example 2 As a surface layer, 98 parts by weight of a low-density polyethylene resin (A) (Sumikasen CE3506 manufactured by Sumitomo Chemical Co., Ltd.), 2 parts by weight of diglycerin oleate (B), and vitamin E2
Using a resin composition consisting of 50 ppm, a low-density polyethylene resin (A) (Sumikasen CE3506 manufactured by Sumitomo Chemical Co., Ltd.) as an intermediate layer, each having a diameter of 50 mm,
Using an extruder with an L / D of 32, melt-knead at 280 ° C and lead it to a three-layer T-die (die temperature: 280 ° C), the thickness of the two surface layers is 4μ each, the thickness of the intermediate layer is 4μ, and the whole film Co-extruded so that the thickness of the
It cooled with the chill roll cooled to ° C, slit it to 300 mm in width, and obtained a film of two kinds and three layers.

Comparative Example 1 A resin composition comprising 98 parts by weight of a low-density polyethylene resin (A) (Sumikacene CE3506 manufactured by Sumitomo Chemical Co., Ltd.) and 2 parts by weight of diglycerol oleate (B) was used. Is melted and kneaded at 280 ° C. using an extruder of 32, guided to a T-die (die temperature: 280 ° C.), extruded so as to have a film thickness of 12 μm, and cooled by a chill roll cooled to 30 ° C. The film was slit to obtain a single-layer film.

Comparative Example 2 A resin composition comprising 98 parts by weight of a low-density polyethylene resin (A) (Sumikacene CE3506 manufactured by Sumitomo Chemical Co., Ltd.) and 2 parts by weight of diglycerin oleate (B) was used as a surface layer. Using a high-density polyethylene resin (A) (Sumikasen CE3506 manufactured by Sumitomo Chemical Co., Ltd.), using an extruder having a caliber of 50 mm and an L / D of 32, respectively.
Melt and kneaded at 0 ° C. to form a three-layer T-die (die temperature: 280).
° C), the two surface layers are each co-extruded so that the thickness of each of the surface layers is 4μ, the thickness of the intermediate layer is 4μ, and the thickness of the entire film is 12μ, and cooled with a chill roll cooled to 30 ° C.
The film was slit into a width of 300 mm to obtain a film of two kinds and three layers.

The evaluation method is as follows. Suppressing effect of oxidizing odor A film of 300 mm width wound in a roll shape on a paper tube with a length of 100 m is put in a paper decorative case and placed in a hot air oven (HISPEC HT310 manufactured by Ettack Engineering) adjusted to a temperature of 50 ° C. Keep in. Immediately after film formation, 1 week after storage in hot air oven, 2 weeks,
One month later, 10 monitors evaluated the odor of the film. Depending on the intensity of the odor, no score is given for the odor such as: 4 points, slightly oxidative odor: 3 points, oxidative odor: 2 points, strong oxidative odor: 1 point The average value was evaluated as follows. Evaluation ：: Average point is 3.5 or more Δ: Average point is 2.0 or more and less than 3.5 ×: Average point is less than 2.0 The results are shown in Table 1.

[0020]

[Table 1]

[0021]

The wrap film for food packaging of the present invention comprises:
Oxidation odor caused by fatty acid esters of aliphatic polyhydric alcohol contained as an adhesive or a softening agent,
α, β, γ, and δ-tocopherol; and α,
By using one or more vitamin Es selected from the group consisting of β, γ, and δ-tocotrienol,
It can be suppressed sufficiently with high safety.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification code FI Theme coat ゛ (Reference) C08K 5/1545 C08K 5/1545 C08L 23/00 C08L 23/00 F-term (Reference) 3E086 AB01 AD13 BA02 BA04 BA15 BA40 BB57 BB77 CA01 4F071 AA14 AA15 AA20 AC10 AC19 AE04 AE05 AH04 BC01 4F100 AH02H AH10H AK03A AK03B AK06 AL05A AL05B BA02 CA04A CA04B CA06A CA06B EH23 GB23 JC00 4J02 BB011 BB012 BB011 BB011 BB011

Claims (3)

[Claims] 1. Polyolefin synthetic resin 90-99.
In a food packaging wrap film containing 9 parts by weight and 0.1 to 10 parts by weight of a fatty acid ester of an aliphatic polyhydric alcohol, α, β, γ, and δ-tocopherol, and α, β, γ, And a wrap film for food packaging, comprising one or more vitamin Es selected from the group consisting of δ-tocotrienol and 50 to 500 ppm. 2. The food packaging wrap film according to claim 1, further comprising one or more additives. 3. The food packaging wrap film according to claim 1, which is composed of a single layer or a multilayer, and has a total thickness of 8 μm to 20 μm.