JP6511713B2 - Laminate for packaging material - Google Patents

Description

  The present invention relates to a laminate for packaging material comprising a non-adsorbable sealant film in which the amount of adsorption of the active ingredient contained in contents such as chemical products, pharmaceuticals and foods is reduced, more specifically, in the contents The present invention relates to a laminate for a packaging material comprising a sealant film which can maintain a high content of the active ingredient of the above, exhibit high seal strength, and is easy to form a film.

  Conventionally, in the innermost layer of a packaging material such as a packaging bag or a lid, a sealant layer comprising a polyolefin resin such as polyethylene or polypropylene exhibiting a high seal strength, or a copolymer resin such as an ionomer or EMMA is provided. These resins can achieve high adhesion strength by heat sealing, but are known to be easy to adsorb various organic compounds. Therefore, a packaging material having a sealant layer composed of these resins as the innermost layer, ie, a layer in contact with the contents, is unsuitable for packaging chemical products, pharmaceuticals, foods and the like containing an organic compound as an active ingredient. It is necessary to take measures such as including more active ingredient in it.

Therefore, development of a sealant layer which is difficult to adsorb an active ingredient while having a good seal strength has been made. Typically, a packaging material having a non-adsorbable sealant layer made of an acrylonitrile resin as the innermost layer is used (Patent Document 1).
However, acrylonitrile resins do not have good seal strength and are expensive, so development of a more preferable non-adsorbable sealant film is required.

  On the other hand, for example, Patent Document 2 discloses a non-adsorbable packaging material in which the innermost layer is formed of a deposited film of an aluminum foil or an inorganic substance. The packaging material is used by forming a bag by partially forming an adhesive resin layer on the aluminum foil or the vapor deposition film. As the adhesive resin layer, urethane resins, vinyl chloride-vinyl acetate copolymers, acrylic resins and the like are disclosed. However, such a packaging material has a complicated manufacturing process.

Japanese Patent Application Laid-Open No. 7-132946 Japanese Patent Application Laid-Open No. 10-45176

  An object of the present invention is to solve the above-mentioned problems, to provide a laminate for a packaging material comprising a sealant film which exhibits excellent non-adsorbability and seal strength, and which is easy to form a film.

  The inventors of the present invention have found, as a result of various studies, a laminate for a packaging material comprising at least a base film layer, a barrier film layer, and a non-adsorbable sealant film layer, wherein the non-adsorbable sealant film layer is at least It is a layer which consists of a base resin layer and a seal layer, and the base resin layer is a layer which consists of homo polyethylene terephthalate (homo PET), and the seal layer is an amorphous copolymer whose glass transition point is 70-90 ° C. It has been found that the above-mentioned laminate for a packaging material, which is characterized in that it is a layer made of polyester and laminated by extrusion coating on the base resin layer, achieves the above-mentioned purpose.

And this invention is characterized by the following points.
(1) A laminate for a packaging material comprising at least a base film layer, a barrier film layer, and a non-adsorbable sealant film layer, wherein the non-adsorbable sealant film layer comprises at least a base resin layer and a sealing layer And the base resin layer is a layer composed of homoPET, and the seal layer is composed of non-crystalline copolyester having a glass transition temperature of 70 to 90 ° C., and the extrusion coating is performed on the base resin layer. The above-mentioned laminate for a packaging material, which is a layer laminated by
(2) A laminate for a packaging material according to the above (1), characterized in that an anchor coating agent is applied to the laminated surface of the base resin layer before extrusion coating the seal layer onto the base resin layer. body.

  In the case of a single-layer sealant film consisting only of a generally well-known polyolefin resin, its thickness is proportional to the amount of adsorption of organic compounds and seal strength. Therefore, if the sealant film of the packaging bag is thinned to prevent adsorption of the contents, the seal strength is reduced and the impact resistance of the bag is reduced. In addition, if the thickness of the sealant film is increased to enhance impact resistance, the amount of adsorption of the contents is increased.

  On the other hand, the non-adsorbable sealant film of the laminate for a packaging material of the present invention has excellent non-adsorbability by extruding an amorphous copolyester having a glass transition point of 70 to 90 ° C. It achieves both of the seal strength.

Moreover, this tendency becomes more remarkable by laminating | stacking by extrusion coating on the base resin layer which consists of homoPET. That is, it was found that by backing the seal layer made of the copolymerized PET with a base resin layer made of homoPET, high interlayer adhesive strength can be obtained, and non-adsorbability and seal strength are enhanced.
In addition, before laminating the seal layer made of copolyester on the base resin layer made of homoPET, by applying an anchor coating agent to the laminated surface of the base resin layer, the interlayer adhesion strength is enhanced, and non-adsorption is achieved. And the seal strength is further improved.

The laminate for a packaging material comprising the non-adsorbable sealant film of the present invention comprises various organic compounds, particularly fat-soluble substances such as l-menthol, camphor (camphor), isopropylmethylphenol (IPMP), vitamin E acetate, limonene And the like are difficult to adsorb, and can be suitably used as the packaging material for these.
Furthermore, the laminate for a packaging material of the present invention is suitable for packaging various contents, and in particular, can be suitably used to form a pharmaceutical packaging bag for which non-adsorption is required. .

It is a schematic sectional drawing which shows an example about the laminated constitution of the non-adsorbable sealant film in the laminated body for packaging materials of this invention. It is a schematic sectional drawing which shows another example about the laminated constitution of the non-adsorbable sealant film in the laminated body for packaging materials of this invention. It is a schematic sectional drawing which shows an example about the laminated constitution of the laminated body for packaging materials of this invention.

The above invention will be described in more detail below.
<1> Layer Configuration of Non-Adsorbable Sealant Film of the Present Invention and a Laminate for a Packaging Material Having the Same FIGS. 1 to 3 show the layer construction of the non-adsorbable sealant film of the present invention and a laminate for a packaging material having the same It is a schematic sectional drawing which shows an example.

In the present invention, as shown in FIG. 1, the non-adsorbable sealant film has two basic layers, a base resin layer 1 and a seal layer 2.
Further, as shown in FIG. 2, before laminating the seal layer on the base resin layer 1, the anchor coat agent layer 3 may be provided on the lamination surface. Further, in some cases, the surface of the anchor coating agent layer 3 may be subjected to ozone treatment to provide the ozone treated layer 4.

Furthermore, as the laminate for a packaging material of the present invention having the non-adsorbable sealant film, as shown in FIG. 3, a laminate having the non-adsorbable sealant film A, the barrier film B, and the base film C I can mention the body. In this laminate, the seal layer 2 forms the outermost layer, that is, the layer which becomes the innermost layer when applied to a package. The non-adhesive sealant film A, the barrier film B, and the base film C may be laminated by laminating via the adhesive layer D.
Hereinafter, as the resin name used in the present invention, those commonly used in the industry are used.

<2> Base resin layer In the present invention, the base resin layer of the non-adsorbable sealant film is made of homo-PET. Thereby, the interlayer adhesive strength with the seal layer which consists of copolymerized polyesters increases.
Homo-PET is a crystalline PET formed by polycondensation of terephthalic acid and ethylene glycol by any method such as transesterification method or direct esterification method, and it is a conventional additive, unavoidable impurities, etc. Except for the above, other copolymerization components are not positively contained.
As conventional additives, if necessary, antioxidants, ultraviolet light absorbers, light stabilizers, antistatic agents, antiblocking agents, lubricants (fatty acid amides etc.), flame retardants, inorganic or organic fillers, The ink composition may contain one or more of additives such as a crosslinking agent, a coloring agent such as a dye and a pigment, and a modifying resin.
General-purpose homoPET having a number average molecular weight of about 2 to about 30,000 can be suitably used.

<3> Sealing layer In the present invention, the sealing layer of the non-adsorbable sealant film is made of non-crystalline copolyester having a glass transition temperature of 70 to 90 ° C., more preferably 70 to 80 ° C.
As copolymerized polyester in the present invention, copolymerized polyethylene terephthalate (PET) can be mentioned as a representative example. As such a copolymerized PET, terephthalic acid and ethylene glycol are main components, and in addition thereto, polyvalent carboxylic acids other than terephthalic acid and / or polyhydric alcohols other than ethylene glycol as a copolymer component are non-crystalline. And added so that the glass transition temperature becomes 70 to 90.degree. C., and modified PET obtained by copolymerization is used.

  In the present invention, “amorphous” means that it has no melting peak when heated at a rate of 20 ° C./min from −100 ° C. to 300 ° C. using a differential scanning calorimeter (DSC). Do.

In the present invention, the glass transition point is measured in accordance with JIS K7121.
The polyvalent carboxylic acid added as a copolymerization component is isophthalic acid, orthophthalic acid, adipic acid, azelaic acid, sebacic acid, dimer acid (based on dimer of unsaturated fatty acid or its hydrogenated substance) And diphenyl carboxylic acid, trimellitic acid, pyromellitic acid, sodium 5-sulfoisophthalate and the like.
Moreover, as polyhydric alcohols added as a copolymerization component, diethylene glycol, propylene glycol, 1,4-cyclohexanedimethanol, trimethylolpropane, neopentyl glycol, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, pentaerythritol, bisphenol A ethylene oxide adduct, etc. are mentioned.

Specific examples of the copolymerization PET include co-condensation polymers of combinations of terephthalic acid and isophthalic acid and ethylene glycol, terephthalic acid and ethylene glycol and 1,4-cyclohexanedimethanol, terephthalic acid and isophthalic acid and propylene glycol, etc. And PET.
The mixing ratio of the main component and the copolymerization component is not particularly limited as long as it exhibits non-crystallinity and has a desired glass transition point, but, for example, 50 mol% or more of polyvalent carboxylic acid as a raw material is terephthalic acid Also, 50 mol% or more of the polyhydric alcohol used as the raw material is ethylene glycol. If the amounts of terephthalic acid and ethylene glycol used as raw materials are smaller than this, impact resistance and non-adsorption can be impaired.

In addition, the total amount of terephthalic acid and ethylene glycol as main components is 50 to 95% by mol based on the total amount 100 mol% of polyvalent carboxylic acid and polyhydric alcohol as raw materials, and the total of copolymerization components Preferably, the amount is 5 to 50 mol%. When the total amount of the copolymerization components is less than 5 mol%, the non-crystallinity is lost and the seal strength is impaired.
Furthermore, in the present invention, among the above-mentioned non-crystalline copolyesters, copolyesters prepared so as to have a glass transition point of 70 to 90 ° C. are used. This preparation can be appropriately performed by those skilled in the art by changing the mixing ratio, the degree of polymerization, and the like of these according to the chemical structure of the polyvalent carboxylic acid and the polyhydric alcohol used as the raw material.

  In the present invention, by using an amorphous polyester having a glass transition temperature of 70 to 90 ° C., excellent seal strength and heat sealability can be obtained by heat sealing at 100 to 200 ° C., more preferably 120 to 160 ° C. It is exhibited. If the glass transition temperature is out of this range, the low-temperature sealability is impaired, or it is not preferable because a sufficient seal strength can not be obtained.

Satisfying the above requirements, amorphous copolyester having a glass transition point is at 70 to 90 ° C. is also commercially available, those preferably used in the present invention, Byron ^(R) (Toyobo (Manufactured by KK Co., Ltd.), Eastar PETG (manufactured by EASTMAN CHEMICAL Co., Ltd.) and the like.

  Here, the sealing layer may contain the antiblocking agent in an amount of 1 to 10% by mass, more preferably 3 to 5% by mass. By including the antiblocking agent in this amount, it is possible to improve the slipperiness of the film without impairing the seal strength, non-adsorption property and interlayer adhesion strength with the base resin layer.

  Antiblocking agents suitably used in the present invention include oxides such as aluminum oxide, magnesium oxide, silica, calcium oxide, titanium oxide and zinc oxide, and hydroxides such as aluminum hydroxide, magnesium hydroxide and calcium hydroxide. , Carbonates such as magnesium carbonate and calcium carbonate, sulfates such as calcium sulfate and barium sulfate, magnesium silicate, aluminum silicate, calcium silicate, silicates such as aluminosilicate, etc., kaolin, talc, diatomaceous earth And inorganic compound-based anti-blocking agents, and mixtures of two or more of these.

  Further, the sealing layer is, if necessary, an antioxidant, an ultraviolet light absorber, a light stabilizer, an antistatic agent, a lubricant (fatty acid amide, etc.), a flame retardant, an inorganic substance, as long as the effects of the present invention are not impaired. Or a colorant such as an organic filler, a crosslinking agent, a dye, or a pigment, and may further contain one or more additives such as a modifying resin.

<4> Production of Non-Adsorbable Sealant Film The non-adsorbable sealant film used in the present invention extrudes and coats the above-mentioned copolyester which forms a seal layer on a resin film consisting of homoPET which forms a base resin layer. Manufactured by
The extrusion temperature can be appropriately selected by those skilled in the art according to the type of copolyester, and may be, for example, a wide temperature range of 200 to 280 ° C.
By extruding the above-mentioned copolyester on a resin film consisting of homoPET, high non-adsorbability and seal strength are exhibited.

Here, the layer thickness of the base resin layer is 10 to 30 μm, more preferably 10 to 20 μm. If it is thinner than 10 μm, the strength as a substrate is insufficient, and if it is thicker than 30 μm, it is not preferable because it becomes hard as a sealant film and the cost increases.
The thickness of the seal layer is 15 to 60 μm, more preferably 20 to 50 μm. If it is thinner than 15 μm, the stability will be poor, the seal strength will be weak, and if it is thicker than 60 μm, it will be hard as a sealant film and the cost will be high, which is not preferable.

Before extrusion-coating the seal layer on the base resin layer, the laminated surface of the base resin layer may be surface treated.
In particular, by applying a polyurethane-based, polyester-based or acrylic-based anchor coating agent to the laminated surface of the resin film made of homoPET that constitutes the base resin layer, and in some cases, by further performing ozone treatment, The adhesion of is further improved.

<5> Laminate for Packaging Material The base film layer and the barrier film layer may be laminated on the non-adsorbable sealant film to obtain the laminate for packaging material of the present invention.

Base Film In the present invention, as the base film, various types of paper such as resin film of single layer or multilayer laminated structure, imitation paper, clay coated paper, kraft paper, paper board, synthetic paper, etc. may be used. There is no particular limitation, and any resin film and / or paper used for various packaging bags and packaging containers can be used.
As resin which constitutes the above-mentioned resin film, olefin system resin (polyethylene system resin, polypropylene system resin etc.), halogen content resin (vinyl chloride system resin etc.), vinyl alcohol system resin, (meth) acrylic resin, styrene system resin Polyester resin (polyalkylene terephthalate resin such as polyethylene terephthalate, polyethylene naphthalate and polybutylene terephthalate), polyamide resin (polyamide 6, polyamide 66 etc), polycarbonate resin, polysulfone resin (polyether sulfone, polysulfone) And the like), polyphenylene ether resins, cellulose esters, and the like. These resins may be used alone or in combination of two or more. The resin film may be unstretched or may be a uniaxially or biaxially stretched film.

In the present invention, the substrate film may be a composite film in which two or more are laminated.
Furthermore, the laminated surface of these base films may be surface-treated (for example, corona discharge treatment, anchor coating treatment, primer treatment, etc.) in order to enhance adhesion with the barrier film. The thickness of the substrate film is not particularly limited, and can be selected usually in the range of about 1 μm to 2 mm, preferably about 5 μm to 1 mm, according to the application.

Barrier Film In the present invention, as the barrier film, for example, a material having a property of shielding light such as sunlight or a property of not transmitting a gas such as water vapor, water or oxygen can also be used.
Specifically, for example, a metal foil such as aluminum foil, a resin film having a deposited film such as aluminum, a resin film having a deposited film of an inorganic oxide such as silicon oxide or aluminum oxide having a barrier property, water vapor, etc. A light shielding property obtained by kneading a coloring agent such as a pigment with a resin film having barrier properties, a film of resin such as polyvinyl alcohol having gas barrier properties, saponified ethylene-vinyl acetate copolymer, MXD6 nylon, etc. The various colored resin films etc. which it has can be used.

Lamination The lamination of the base film, the barrier film, and the non-adsorbable sealant film is suitably performed by laminating them by a dry lamination method via an adhesive.
Examples of the adhesive used in the present invention include a two-component curable polyurethane-based adhesive for dry lamination.
Moreover, it can also bond together by the extrusion lamination method (what is called a sandwich lamination method) through an adhesive layer. In this case, as the adhesive layer, a polyolefin-based heat adhesive resin, for example, LDPE, ethylene-methacrylic acid copolymer, ethylene-acrylic acid copolymer, ionomer alone, or hard resin etc. Resin etc. which blended the adhesion improving agent can be used.

In a further aspect of the present invention, in the layer configuration of the laminate of the present invention, a printing layer such as characters, figures, symbols, patterns, etc. is provided at an arbitrary position, for example, between the base film and the barrier film. It is also good.
In the laminating step, the non-adsorbable sealant film may be formed in advance by laminating a seal layer on the base resin layer by extrusion coating before bonding to the barrier film. Alternatively, after bonding the homo-PET film forming the base resin layer to the barrier film, the seal layer may be laminated by extrusion coating on the homo-PET film.

<6> Packaging bag The laminate of the present invention can be used to form a packaging bag by forming a non-adsorbable sealant film layer as the innermost layer. Moreover, a package can be manufactured using the laminated body of this invention as a cover material which makes a non-adsorbable sealant film layer an innermost layer.

  In order to produce a packaging bag, the above laminate is folded in two or two laminates are prepared, the non-adsorbable sealant film layers are opposed to each other, and the peripheral edges thereof are Standing pouch type, side seal type, two side seal type, three side seal type, four side seal type, envelope stuck seal type, combined palm seal type (pillow seal type), crimped seal type, flat bottom seal type, square bottom seal type It heat-seals by heat-sealing forms, such as a gusset type | mold, and is set as the packaging bag of various forms.

In the above, as a method of heat sealing, it can carry out by publicly known methods, such as bar seal, rotation roll seal, belt seal, impulse seal, high frequency seal, ultrasonic seal etc., for example.
In order to manufacture a packaging container using the above laminate as a lid, the laminate is superimposed on the opening of the resin container so that the surface of the non-adsorbable sealant film layer is in contact, and heat sealed as in the bag. It can be done by
The packaging bag and the packaging container which consist of the above-mentioned layered product especially, for example as a outer bag of patch for packing of a chemical product, medicine, quasi-drug, cosmetics, food etc. which contain an organic compound as an active ingredient, Alternatively, it can be suitably used as a standing pouch used for refilling contents such as lotions.
Next, the present invention will be specifically described by way of examples.

Example 1
(1) A biaxially stretched PET film (manufactured by Toyobo Co., Ltd. E5100; thickness 12 μm) is used as a base film, and an adhesive (Rock Paint Co., Ltd. Lock Bond J / Ad Lock, RU 77 T) is used on one side thereof. / H-7; using an oblique line plate with a plate depth of 90 μm and a coating amount of 3.0 g / m ² , an aluminum foil with a thickness of 7 μm (A1N30H manufactured by Japan Foil Co., Ltd.) It bonded to -O) and stored in a 40 degreeC thermostat for 48 hours, and hardened the adhesive agent.
(2) Next, an adhesive is similarly applied to the surface of the aluminum foil, and is bonded to a biaxially stretched homo-PET film (PTMB made by Unitika; thickness 12 μm) as a base resin layer, and 48 in a 40 ° C. thermostatic chamber. It was stored for a while and the adhesive was cured.
(3) Next, on this biaxially stretched homoPET film, a polyurethane anchor coating agent (Takelac / Takenate manufactured by Mitsui Chemicals, Inc., A-3210 / A-3075; compounding ratio 1/1) with a plate depth of 20 μm It applied by the coated amount by 0.4 g / m < ² > using the diagonal plate.
(4) Next, on this anchor coat agent coated surface, as a seal layer, non-crystalline PET (SI-173 made by Toyobo Co., Ltd .; glass transition point 78 ° C) is laminated by extrusion coating to a layer thickness of 30 μm. , The laminate of the present invention was manufactured. The layer configuration of this laminate was as follows:
Biaxially oriented PET film / adhesive / aluminum foil / adhesive / biaxially oriented homoPET film / anchor coating agent layer / seal layer

Comparative Example 1
A laminate was produced in the same manner as in Example 1 except that a low density polyethylene resin (LDPE; Novatec LC522 manufactured by Japan Polyethylene Corporation) was used instead of amorphous PET in forming the seal layer.

Comparative Example 2
A laminate was manufactured in the same manner as Example 1, except that linear low density polyethylene resin (LLDPE; Sumikasen CW 8003 manufactured by Sumitomo Chemical Co., Ltd.) was used instead of amorphous PET in forming the seal layer. did.

[Evaluation method and result]
(1) Adsorption test (l-menthol)
The laminates of Examples and Comparative Examples were cut into 10 cm × 10 cm squares, and their initial weights were measured.
Put 10 g of l-menthol solid (Genno Kagaku Co., Ltd.) in a 10 l stainless steel container, cover it, fill the container with l-menthol vapor, suspend the cut laminate in it, It was stored for 7 days at ° C.
After storage, the laminate was taken out and weighed, and the amount of adsorption of 1-menthol was calculated from the difference from the initial weight.

(2) Adsorption test (acetic acid dl-α-tocopherol)
The laminates of Examples and Comparative Examples were cut into 5 cm × 5 cm squares, and their initial weights were measured.
A dl-α-tocopherol acetate solution (Kanto Chemical Co., Ltd.) was applied to the surface on the seal layer side, the coated surface was brought into close contact with the glass petri dish, and the lid was stored for 7 days at 40 ° C.
After storage, the laminate was taken out and the dl-α-tocopherol solution on the coated surface was removed, after which the weight was measured, and the adsorption amount of dl-α-tocopherol acetate was calculated from the difference from the initial weight.

(3) Seal strength test The laminates of the examples and comparative examples are stacked with the seal layer inside, and pressure is applied at 160 ° C. for 1 second with a heat sealer (TP-701S HEAT SEAL TESTER manufactured by Tester Sangyo Co., Ltd.). Heat sealed at 1 kgf / cm ² .
Next, this was cut into a strip of 15 mm in width, the pressure-bonded seal portion was peeled off using a Tensilon tensile tester (RTC-1310A manufactured by ORIENTEC Co., Ltd.), and the seal strength was measured. The tensile speed at this time was 300 mm / min.
The results are shown in the following table.

  The laminate of Example 1 exhibited high non-adsorbability and seal strength. On the other hand, the laminates of Comparative Examples 1 and 2 adsorbed a large amount of 1-menthol and dl-α-tocopherol acetate although they exhibited high seal strength.

A. Non-Adsorbent Sealant Film B. Barrier film C.I. Base film D.1. Adhesive layer 1. Base resin layer Seal layer 3. Anchor coat agent layer4. Ozone treatment layer

Claims (5)

A laminate for a low temperature sealable fat-soluble substance non-adsorbable packaging material comprising at least a base film layer, an adhesive layer, and a fat-soluble substance non-adsorbable sealant film layer heat-sealable at 120 to 160 ° C. There,
The non-adsorbable sealant film layer comprises at least a base resin layer and a sealing layer,
The base resin layer is a layer composed of crystalline homopolyethylene terephthalate having a number average molecular weight of 2 to 30,000, which is obtained by polycondensation of terephthalic acid and ethylene glycol ,
The seal layer is made of polyvalent carboxylic acid and polyvalent alcohol as raw materials,
More than 50 mol% of all polyvalent carboxylic acids are terephthalic acid,
At least 50 mol% of the total polyhydric alcohol is ethylene glycol,
50 to 95 mole% of the total of all polyvalent carboxylic acids and all polyvalent alcohols is terephthalic acid and ethylene glycol, and the total amount of copolymerization components is 5 to 50 mole%,
It consists of non-crystalline copolyethylene terephthalate having a glass transition temperature of 70 to 90 ° C.,
The outermost layer of a laminate for non-adhesive packaging materials,
The sealing layer is a layer laminated by extrusion coating in a temperature range of 200 to 280 ° C. on a base resin layer provided with an anchor coating agent layer comprising a polyurethane, polyester or acrylic anchor coating agent. Feature
A laminate for the above-mentioned low-temperature sealable fat-soluble substance non-adsorbable packaging material. The adhesive layer is a layer comprising a resin selected from polyolefin-based heat adhesive resins, ethylene-methacrylic acid copolymers, ethylene-acrylic acid copolymers, and ionomers,
The anchor coating agent layer is a layer comprising a polyurethane, polyester or acrylic anchor coating agent,
A laminate for a low temperature sealable fat-soluble substance non-adsorbable packaging material according to claim 1. The adhesive layer is a layer comprising ethylene-methacrylic acid copolymer or ethylene-acrylic acid copolymer,
The anchor coating agent layer is a layer comprising an acrylic anchor coating agent,
The low temperature-sealable lipid-soluble substance non-adsorbable packaging laminate according to claim 1 or 2. Prior to extrusion coating the seal layer onto the base resin layer, the seal layer laminated surface of the base resin layer is subjected to surface treatment.
Surface treatment is characterized by a coating and ozone treatment of the anchor coating agent, low-temperature sealability of fat-soluble substances non-adsorbing packaging laminate body according to any one of claims 1 to 3 . Furthermore, the laminate for low temperature sealable fat-soluble substance non-adsorbable packaging materials according to any one of claims 1 to 4, further comprising a barrier film layer.

Images