JPH05246459A - Deoxidation agent packaging body - Google Patents

Abstract

PURPOSE:To provide a deoxidation agent packaging body made of a packaging material for deoxidation agent, which is superior in durability and can display a stable deoxidation performance. CONSTITUTION:A deoxidation agent is packaged using an air-permeable packaging material (A) for which on one surface of a specified nonwoven fabric with the Gurley air permeability of 0.1-10,000sec/100ml or micro-porous film (a1), a resin (a2) which has a softening point being equivalent to the nonwoven fabric of micro-porous film or lower is formed into numerous stripes, and a non-air- permeable single layer film or laminated film (B) on respective surfaces, and the packaging material and film are sealed to obtain a deoxidation agent package. By this method, the deoxidation agent packaging body can retain the air permeability, durability and bagging property owned by the packaging materials themselves, prevents the deoxidation agent from deteriorating, and can display a stable deoxidation performance.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oxygen absorber packaging material, and more particularly, to a single sided packaging material using a non-woven fabric or a microporous membrane that does not allow water to pass under normal pressure as the oxygen absorber packaging material. On the adhesive layer side of the resin, a resin having a softening point equal to or lower than that of the nonwoven fabric or the microporous film is formed into a large number of streak-like permeable packaging materials by a method such as extruding a resin, laminating, coating, etc. The present invention relates to an oxygen scavenger package characterized by comprising a breathable single-layer film or a laminated film on one side of an oxygen scavenger packaging material. The oxygen scavenger package exhibits a stable oxygen scavenging performance and is therefore used in a wide range as a preservative for processed foods.

[0002]

2. Description of the Related Art An oxygen scavenger is a composition having a property of absorbing oxygen, and is usually used by being enclosed in a breathable pouch. Generally, a packaging material (hereinafter referred to as "packaging material") that constitutes a breathable sachet enclosing an oxygen scavenger includes, for example, a packaging material in which paper and a perforated polyethylene film are laminated, a perforated plastic film, paper and a perforated film. A packaging material in which polyethylene films are laminated and bonded, and a packaging material using a non-woven fabric, a microporous film, or the like are used.

[0003]

As a problem in food preservation technology using an oxygen absorber, the oxygen absorber is used in various foods such as dried foods, high-moisture foods, acidic foods, oil-processed foods and alcohol-containing foods. For use in food, water contained in the oxygen scavenger composition is transferred to the dry food and deoxidizing performance is impaired, or water in a high-moisture food is transferred to the oxygen scavenger composition. Stain is generated on the surface to impair the appearance, and oil of food permeates the packaging material, impairing the air permeability of the packaging material and deoxidizing performance. Due to such a drawback, when using an oxygen scavenger, it is the current situation that the material and structure of the packaging material are changed according to the situation.

In recent years, the application fields of oxygen scavengers have been diversified and the usage conditions have tended to become harsh, so that packaging materials with excellent durability using non-woven fabrics or microporous membranes have been widely used. However, as a packaging material using a conventional non-woven fabric or microporous membrane, polyethylene on the non-woven fabric or microporous membrane,
Thermally laminated low melting point perforated sealant film made of polyethylene / vinyl acetate copolymer, ionomer resin, or the like, or the non-woven fabric or a perforated plastic laminated film of a film having a lower softening point and a higher softening point than the microporous film It is often used that the film layer having a low softening point is a heat laminated layer. This is because the low melting point film melts during the heat laminating process and the perforated plastic film has a small diameter. Lamination conditions such as clogging of holes are difficult, productivity is low, cost is low, and adhesive strength during bag making is poor, and air permeability cannot be freely adjusted.

INDUSTRIAL APPLICABILITY The present invention makes it easy to manufacture an oxygen absorber packaging material and makes a bag, has stable air permeability, seal strength, and laminate strength, and has excellent durability such as water resistance and oil resistance. An object of the present invention is to provide an oxygen absorber packaging body using an oxygen absorber packaging material capable of exhibiting stable oxygen absorber performance.

[0006]

Means for Solving the Problems As a result of intensive studies aimed at achieving the above-mentioned object, the inventors of the present invention have found that the above-mentioned Galley-type air permeability is 0.1 to 10,000 seconds / 100 ml of water under normal pressure. On one side of the non-woven fabric or microporous membrane, the breathable packaging material (A) in which a large number of resin is formed as an adhesive layer and the non-breathable single-layer film or laminated film (B) are removed. The present invention has been completed by finding that an oxygen scavenger packaging body obtained by sealing oxygen scavengers by packaging the oxygen scavenger with the adhesive surface inside and then achieving the above-mentioned object is achieved. Came to do.

The present invention comprises a non-woven fabric or a microporous membrane, which is made of polyethylene or polypropylene and has a Gurley type air permeability of 0.1 to 10,000 seconds / 100 ml and is impermeable to water at normal pressure. A breathable packaging material (A) in which a resin having a softening point equal to or lower than that of the microporous membrane is formed in a number of streaks and a non-breathable single-layer film or laminated film (B) are packaged with an oxygen scavenger. An oxygen absorber packaging body, characterized in that it is used for each one side of a material, and the oxygen absorber is packaged and sealed with the adhesive surface inside. Hereinafter, the present invention will be described in detail.

The breathable packaging material (A) used in the present invention comprises a non-woven fabric or a microporous membrane on one side of which a resin having a softening point equal to or lower than that of the non-woven fabric or the microporous membrane is formed in a number of streaks. A breathable packaging material. It is made of polyethylene or polypropylene and has a Galerian air permeability of 0.
A water-impermeable non-woven fabric at atmospheric pressure of 1 to 10,000 seconds / 100 ml is obtained by spun a continuous and extremely fine interlaced fiber bundle made of polyethylene or polypropylene, and then heating and pressing the fibers to join them together. Nonwoven fabrics are known, and for example, Tyvek (manufactured by DuPont), Luxer (manufactured by Asahi Kasei Kogyo Co., Ltd.) and the like are known.

It is made of polyethylene or polypropylene and has a Gurley type air permeability of 0.1 to 10,000 seconds / 100 ml.
As the plastic film which is a microporous membrane that does not pass water at normal pressure, which is produced by stretching a synthetic resin film such as polyethylene or polypropylene, at that time,
It is produced by a method such as adding fine powder of silica, talc, calcium carbonate or the like, stretching the film, and extracting the fine powder from the film containing the fine powder.
Those having micropores of 0.01 to 30 μm are used. For example, NF sheet (manufactured by Tokuyama Soda Co., Ltd.), Porum (manufactured by Tokuyama Soda Co., Ltd.), Serpore (manufactured by Sekisui Chemical Co., Ltd.), FP-2 (manufactured by Asahi Kasei Co., Ltd.), NOP
(Manufactured by Nippon Petrochemical Co., Ltd.), Nitoflon NTF (manufactured by Nitto Electric Industry Co., Ltd.), polyflon paper (manufactured by Daikin Industries, Ltd.), Jura Guard (manufactured by Celanese), Gore-Tex (manufactured by Gore), TSF (made by Kojin Co., Ltd.) and the like are known.

The resin having a softening point equal to or lower than that of the non-woven fabric or the porous film is, for example, one or more resins selected from polyethylene, ethylene-vinyl acetate copolymer, ionomer resin, polypropylene and the like. Yes, it is melted to about 300 ° C. and applied on one side of the nonwoven fabric or the microporous membrane by a method such as extrusion laminating or coating.

The streak-shaped resin portion thus formed functions as an adhesive layer (seal layer) for bag making as well as reinforcement of the packaging material and adjustment of air permeability. Examples of the sealing method include heat sealing and sealing with an adhesive.

The non-breathable monolayer film or laminated film (B) used in the present invention means polyethylene terephthalate, nylon, polypropylene, vinyl acetate.
It is a single-layer or multi-layer plastic laminated film such as a vinyl alcohol copolymer. The thickness of the monolayer film or laminated film (B) is 10 to 500 μm, preferably 15 to 20 μm.
It is 0 μm. If it is less than 10 μm, it is too thin to be processed, and it is inferior in durability. If it is more than 500 μm, it lacks flexibility of the film, which is not desirable.

In the case of a laminated film, the softening point of the plastic film as the innermost layer is usually 10 ° C. or more lower than that of the other layers. The film can be laminated by fusion, adhesion, pressure bonding, dry laminating method, extrusion laminating or the like, but the thermal fusion method is more preferable mainly when the same material is used.

The innermost layer of the non-breathable laminated film has a softening point equal to or lower than that of the non-woven fabric or microporous membrane of the breathable packaging material (A) formed on the surface of the non-woven fabric or microporous membrane. Since it is heat-sealed with the resin, the same material or a heat-sealable film is preferably used. For example, LDPE, EVA copolymer, a sealant resin having a good low-temperature heat sealing property such as an ionomer film can be used. In addition, a mixed paper made of paper and polyethylene, an ES resin made of a core and a sheath made of a heat-sealable resin such as polyethylene, a non-woven fabric made of polyethylene, a self-heat-sealing of a microporous film, etc. A film having properties is used.

In the single-layer film or the laminated film (B) of the present invention, a hot-melt type adhesive or anchor coating agent may be used on the film surface of the single-layer film or the laminated film, if necessary, by printing or coating. It is also possible to form an adhesive layer for use. Further, the breathable packaging material (A)
It is also possible to apply multiple streaky resin forming methods on the non-woven fabric or microporous membrane surface to form a large number of streaky resins as an adhesive layer on the membrane surface of a single-layer film or laminated film for use. Is.

The adhesive strength of the oxygen scavenger packaging material of the present invention during bag making varies depending on the type of resin formed in a streak shape, the amount of resin, and heat sealing conditions. In particular, when the amount of resin is extremely small, the adhesive strength is insufficient and it cannot be used. On the other hand, if the amount is too large, it is difficult to secure air permeability. In addition, considering the type and thickness of the sealant film of the non-breathable laminated film of the packaging material configuration in which the sealant film having a good low-temperature heat sealability is laminated on the innermost layer of the non-breathable laminated film, the shape of the streaks is formed. The type of resin formed, the amount of resin, the area of the resin portion, etc. are selected.

The air permeability of the oxygen scavenger packaging material according to the present invention is determined first by the type of the non-woven fabric or microporous membrane used and the shape of the resin formed in a streak shape. In particular, it depends on the size of the area of the part not coated with resin. The shape pattern of the resin applied in a streak shape considers various factors such as air permeability of the oxygen absorber packaging material, adhesive strength, ease of bag making, and the oxygen absorber packaged and sealed does not spill. Can be decided. That is, the amount of resin is 7 to 70 g / m ² , preferably 10 to 50 g / m ² .
The area of the resin part formed in a streak shape at m ² is 30 to 90 of the entire area.
%, The width of the unapplied part between the linearly formed resins is 20 ~
It is desirable that the thickness is 1,000 μm, preferably 50 to 800 μm.

That is, when the amount of resin is 7 g / m ² or less, the adhesive strength is poor and the area of the resin portion formed in a streak shape is 30%.
If it is below, there is a risk that the oxygen absorber filled from the seal will spill or liquid will flow in from the outside, and if the width of the unapplied part of the resin is 20 μm or less, the air permeability will decrease. Not only that, it becomes difficult to apply it uniformly in a streak shape, and the air permeability becomes unstable, which is not suitable as the oxygen absorber packaging material of the present invention. The Gurley type air permeability of the oxygen absorber packaging material thus obtained is 1 to 10,000 sec / 100 m.
It is in the range of l.

The present invention has a Gurley type air permeability of 0.1 to
Nonwoven fabric or microporous membrane of breathable wrapping material (A) which has 10,000 sec / 100 ml and is impermeable to water under normal pressure and has a large number of resin-like adhesive layers formed on one side of the microporous membrane. Is used as one side of the packaging material of the oxygen scavenger, with the adhesive layer on the inside and the non-breathable single-layer film or laminated film (B) on the other side, with the adhesive side facing inward. Since it is an oxygen scavenger package in which the agent is packaged and sealed, the characteristics of the breathable packaging material (A) in which the resin is formed in a large number of streaks can be utilized, and therefore, the intended use, the use form, and the working method. The packaging material can be appropriately selected in consideration of the above. A non-breathable single-layer film or laminated film (B) used on the other side may be used with a film having breathable fine pores within the range where there is no practical problem such as durability. You may.

As the oxygen scavenger to be packaged by using the breathable wrapping material (A) as the oxygen scavenger wrapping material and the non-air permeable single layer film or laminated film (B) on each side, a sulfite is used. , Those containing bisulfite, nitrite, hydroquinone, catechol, resorcin, pyrogallol, gallic acid, metal powder such as iron powder, and ascorbic acid are not particularly limited.

[0021]

In the present invention, the Gurley type air permeability is 0.1 to 10.
It is 000 seconds / 100 ml, and a breathable packaging material (A) in which a resin is formed in a number of streaks as an adhesive layer on one side of a non-woven fabric or a microporous membrane that does not pass water at normal pressure and a non-breathable single layer. A layer film or a laminated film (B) is used for each one side of the packaging material of the oxygen scavenger, and the oxygen scavenger is packaged with the adhesive surface facing inside, and the oxygen scavenger packaging material is The adhesive layer in which the resin inside the packaging material (A) is formed in a multiplicity of streaks is used to limit the heat-sealable resin, the resin amount, the resin part area, and the width of the resin-unapplied part. The innermost layer of the breathable laminated film (B) is also processed with a packaging material configuration that limits the type and thickness of the resin and that is a sealant film having good low temperature heat sealability.

The conventional oxygen scavenger package using a non-woven fabric or a microporous membrane is generally used by laminating a non-woven fabric or a microporous membrane with a perforated low melting point sealant film. In these methods, the laminating conditions are difficult and expensive, and it is not possible to freely adjust the air permeability, but instead of a perforated film, a resin is formed in a number of streaks. The packaging material of the present invention does not have that concern.

In the present invention, since the resin is applied in a large number of streaks to form the adhesive layer, the resin is formed only on a part of the non-woven fabric or the microporous membrane, so that the non-applied part of the non-woven fabric or the microporous membrane is passed through. The air permeability of the packaging material is maintained. Also,
Simply, only one side of the nonwoven fabric or the microporous membrane is formed into a large number of streak-like resin as an adhesive layer, and the other one face is not processed at all and is held as it is. The characteristics are utilized as they are, and the stable air permeability is maintained without significantly lowering the air permeability originally possessed.

The packaging material using the non-woven fabric or the microporous membrane of the present invention makes full use of the features of the non-woven fabric or the microporous membrane,
Furthermore, a large number of streak-shaped resins also serve as an adhesive layer and a reinforcing material for the packaging material. As a result, it is possible to impart a stable air permeability without significantly lowering the air permeability originally possessed by the nonwoven fabric or the microporous membrane, so that the oxygen absorber package has a stable oxygen removal performance. It is possible to obtain an oxygen absorber package that can be exhibited and at the same time has excellent bag-making properties and sufficient adhesive strength and is easy to use.

Unlike the breathable packaging material (A), the non-breathable non-breathable single-layer film or laminated film (B) does not have fine pores, so that contamination from the outside and the inside of the oxygen absorber package can be prevented. There is no rust protruding from the surface and back printing is possible, so the effect of the oxygen absorber on the durability and hygiene is expected. Also,
The packaging material can be appropriately selected in consideration of the purpose of use, usage form, working method, etc., and it can be applied to a wide range of fields.

Therefore, in the present invention, the oxygen scavenger packaging material has an air permeability, durability,
While maintaining the properties such as bag-making properties as they are, they are reproduced, so that a deoxidizing agent package having stable deoxidizing performance and having extremely excellent water resistance and oil resistance can be obtained.

[0027]

EXAMPLES The present invention will be described more specifically with reference to Examples and Comparative Examples. However, the scope of the present invention is not limited to these examples. (1) Sample and comparative sample

Sample-A1 to A3, Comparative Samples-C1 and C2 Tyvek 1059B (polyethylene non-woven fabric manufactured by DuPont) was melted at a temperature of about 300 ° C. with low density polyethylene, and the density was about 100 m / m from the pores of the extruder. It was extruded and laminated at a speed of a minute. (Sample-A1) Further, by changing the processing conditions such as coating speed, pore diameter and interval of pores, melting temperature, and the like, packaging materials having different application amounts of low-density polyethylene, width of resin formed in streaks, and thickness can be obtained. It was made.
(Sample-A2, A3, Comparative sample-C1, C2)

Specimen-A4, A5 Tyvek 1059B (previously described) NF sheet S140
[Thickness: 140 μm, PP microporous membrane manufactured by Tokuyama Soda Co., Ltd.] or Serpore [thickness: 100 μm, Sekisui Chemical Co., Ltd.]
Made of PP microporous membrane], sample-A1
The low density polyethylene was extruded in a streak shape and laminated in exactly the same manner as in 1. to prepare packaging materials (Samples-A4 and A5).

Comparative Samples-C3, C4 Tyvek 1059B (previously described) NF Sheet S140
[Thickness: 140 μm, manufactured by Tokuyama Soda Co., Ltd., PP microporous membrane] In place of the coating speed, the pore diameter and interval of pores, the melting temperature, and other processing conditions, the sample was prepared in the same manner as in Sample-A1. Comparative samples-C3 and C4 of packaging materials having different application amounts of density polyethylene, width of resin formed in a streak shape, and thickness were prepared.

Comparative Samples-C5 and C6 Tyvek 1059B (supra) ((thickness: 25 μm, pore diameter: 300 μm, 1.4 × 1.4 m / m grid-shaped openings) or (thickness: 25 μm, pore diameter: 1000 μm, 5 X 7 m / m rhombus) 2 types of perforated low density polyethylene, 90-100
Comparative Samples-C5 and C6 were prepared by heat lamination at ℃.

Comparative sample-C7 NF sheet S140 (previously described) was provided with perforated low-density polyethylene (thickness: 25 μm, pore size: 300 μm, 1.4 × 1.4 m / m grid-shaped openings) as comparative sample-C5. In exactly the same way
Comparative sample-C7 was prepared by thermal lamination at 90-100 ° C.

Sample-B1 PET (thickness: 12 μm) and PE by extrusion laminating method
A non-breathable PET / PE film sample B1 made of (thickness: 25 μm) was prepared.

Sample-B2 PET (thickness: 12 μm) was melted with low-density polyethylene heated to about 300 ° C. in exactly the same manner as in Sample-A1 at a rate of about 100 m / min from the pores of the extruder. Sample-B2 was produced by extruding and laminating in a streak shape.

Sample-B3 Sample-B3 was prepared by extrusion lamination of PE to a thickness of 20 μm on the aluminum surface of a laminated film obtained by laminating PET (previously described) and aluminum foil (thickness: 15 μm) by the dry laminating method. ..

Samples-B4, B5 PET (above) and TSF-EU [thickness: 60 μm, PE microporous membrane manufactured by Kojin Co., Ltd.] or pulp / PE mixed paper [basis weight: 60 g / m ² , pulp And PE mixed with 60% gas-permeable and water- and oil-repellent mixed paper].
Samples B4 and B5 were produced by laminating at 120 ° C.

Samples-B6, B7 PP (thickness: 30 μm) or PET (thickness: 30 μm) plastic film with 2 g / hot-melt adhesive
Samples-B6 and B7 coated to a coating amount of m ² were prepared.

Samples-B8, B9 Samples-B8, B9 were prepared by applying an anchor coating agent to a plastic film of PP (thickness: 30 μm) or PET (thickness: 30 μm) at a coating amount of 0.15 g / m ² dry. .. The contents of each sample and comparative sample in the present invention produced above are summarized in Table 1 (Examples) and Table 2 (Comparative Examples).

[0039]

[Table 1]

[0040]

[Table 2]

(2) Packaging material test The air permeability, heat seal strength, bag-making property, processability and durability of each sample and comparative sample prepared in the above (1) were measured. The measurement results are shown in Table 3 (Example) and Table 4
The results are summarized in (Comparative Example).

[0042]

[Table 3]

[0043]

[Table 4]

(3) Oxygen absorber package Sample of packaging material prepared in the above (1) -A1 to A5
And Comparative Samples-C1 to C7 on one side of the oxygen absorber package,
On the other side, combine with Sample-B1 to B9, and use the adhesive surface of Sample-B as the inside to make a bag into a 50 x 50 mm wrapping material. Then, the oxygen absorber of the present invention was filled to prepare the oxygen absorber package of the present invention. Each of these oxygen absorber packages and 500 ml of air were placed in a bag of oxygen barrier packaging material (KON / PE, 15 x 30 cm), sealed, and allowed to stand at 25 ° C until the oxygen concentration reached zero. Was measured. The number of samples was 10 for each of the examples and comparative examples.
The measurement results are summarized in Table 3 (Examples) and Table 4 (Comparative Examples).

[0045]

INDUSTRIAL APPLICABILITY The present invention not only facilitates the production and bag making of the oxygen absorber packaging material and has stable air permeability, seal strength and laminate strength, but also water resistance, oil resistance and rust resistance. It is a package of oxygen scavengers that has excellent durability such as stain resistance and can exhibit stable oxygen scavenging performance, and is widely used as a preservative that can be used for applications where it is difficult to use conventional oxygen scavengers. Can be used in a range. Therefore, its industrial significance, including the food field, is extremely significant.

[0046]

[Brief description of drawings]

FIG. 1 shows a cross-sectional view of a breathable packaging material (A) used in the present invention.

[Explanation of symbols]

A: Breathable packaging material (A) a ₁ : Nonwoven fabric or microporous membrane a ₂ : Resin formed in many stripes (adhesive layer)

FIG. 2 is a non-breathable laminated film (B) used in the present invention.
FIG.

[Explanation of symbols]

B: non-breathable laminated film (B) b ₁ : outer film b ₂ : inner film

FIG. 3 shows a cross-sectional view of a monolayer film (C) obtained by applying an adhesive layer to a non-breathable monolayer film used in the present invention.

[Explanation of symbols]

C: non-breathable single-layer film (B) treated with an adhesive layer b ₃ : non-breathable single-layer film b ₄ : adhesive layer

FIG. 4 is a view showing that the breathable packaging material (A) used in the present invention is packed on one side of an oxygen absorber package, and the other side is filled with the oxygen absorber using a non-breathable laminated film (B). A cross-sectional view of the oxygen absorber package obtained by sealing and sealing is shown.

[Explanation of Codes] A: Breathable packaging material (A) a ₁ : Nonwoven fabric or microporous membrane a ₂ : Resin (adhesive layer) formed in a number of streaks B: Non-breathable laminated film (B) b ₁ : outer film b ₂ : inner film D: heat-sealing layer of oxygen absorber package E: oxygen absorber

FIG. 5: An oxygen scavenger using a breathable packaging material (A) used in the present invention, a non-air permeable single layer film (B) obtained by applying an adhesive layer to one surface of an oxygen scavenger package, and to another surface. FIG. 3 is a cross-sectional view of an oxygen absorber package obtained by filling, packaging, and sealing with.

[Explanation of symbols]

A: Breathable packaging material (A) a ₁ : Nonwoven fabric or microporous membrane a ₂ : Resin formed in a number of streaks (adhesive layer) C: Non-breathable single-layer film treated with an adhesive layer (B ) B ₃ : non-breathable single-layer film b ₄ : adhesive layer D: heat seal layer of oxygen absorber package, E: oxygen absorber

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI technical display location B65D 30/02 9146-3E 77/00 K 9145-3E (72) Inventor Yoichi Yamakawa Chiyoda-ku, Tokyo 2-2-1 Otemachi Nippon Soda Co., Ltd.

Claims (4)

[Claims] 1. A non-woven fabric or microporous membrane, which is made of polyethylene or polypropylene and has a Gurley air permeability of 0.1 to 10,000 seconds / 100 ml and is impermeable to water at normal pressure,
Breathable packaging material (A) in which a resin having a softening point equal to or lower than that of the above nonwoven fabric or microporous membrane is formed in a number of streaks
And a non-breathable single-layer film or laminated film (B) are used for each one side of the packaging material of the oxygen scavenger, and the oxygen scavenger is packaged and sealed with the adhesive surface facing inside. Agent package. 2. The oxygen absorber package according to claim 1, wherein the microporous membrane constituting the breathable packaging material (A) has fine pores having a pore diameter of 0.01 to 30 μm. 3. The breathable packaging material (A) comprising a large number of streak-shaped resins comprises a resin amount of 7 to 70 g / m ² , a resin portion area of 30 to 90%, and a resin unapplied portion. Width 20 to 1,000 μm
The oxygen scavenger package according to claim 1 or 2. 4. The oxygen absorber package according to claim 1, wherein the non-breathable single-layer film or the laminated film (B) is a film having a non-adhesive layer or an adhesive layer.