JP6187019B2 - Film for deep drawing, bottom material, and package - Google Patents

Description

  The present invention relates to a film for deep drawing, a bottom material for a deep drawn package, and a deep drawn package that can be suitably used mainly for packaging sliced ham, sliced bacon and the like.

  Conventionally, as a film for deep drawing packaging such as sliced ham and sliced bacon, a polyethylene terephthalate glycol resin (PETG) is arranged in the outer layer, nylon (Ny) and an ethylene-vinyl acetate copolymer saponified product (EVOH) are arranged in the intermediate layer, In addition, composite films having a cohesive failure type easy peel layer in the seal layer have been widely used (for example, Patent Document 1). The reason is that the deep-drawn package having this configuration has a good film waist, is excellent in gloss and transparency, and has a very good appearance.

  However, in recent years, the amount of contents has been reduced, and at the same time, the film used has been thinned to a thickness of 80 μm or less. Deep drawn packages such as sliced ham and sliced bacon place importance on the hardness and curl of the heat seal part as well as the transparency and gloss of the film. For this reason, when the thickness of the film is reduced, the heat-sealed portion is not hardened and the curl tends to be deteriorated, and the appearance and feel at the store are lost. In recent years, so-called triple packs and quadruple packs have been mainstream, in which the package is shifted by three or four and stacked and bonded with a label for over-the-counter sales. However, if the heat seal part is insufficient in hardness or the curl immediately after packing deteriorates, it becomes difficult to align the packaging when attaching the label, the label becomes slanted, or the packaging on the line There is a problem that the line stops due to clogging.

  As a method for improving curl, Patent Document 2 describes blending amorphous polyamide with crystalline polyamide, but the film thickness is 70 μm because the content of amorphous polyamide is 40% or less. If it is less than 1, the curl suppressing effect is insufficient.

  Patent Document 3 describes that high-density polyethylene is disposed in the intermediate layer, and Patent Document 4 describes that polypropylene is disposed in the intermediate layer, both of which are inferior in deep drawability. In so-called stack packaging, in which a film is deep-drawn into a cylindrical shape and several sliced hams are packaged, there is a problem that molding cannot be performed as usual and sliced ham cannot be filled well.

Japanese Patent Laid-Open No. 8-281892 JP 2007-136914 A JP 2007-98579 A JP 2011-125888 A

  The present invention has been made in view of the above circumstances, and the problem to be solved is that the heat-sealable portion is hard without damaging the deep-drawing formability, and the deep-drawing film having a good curl immediately after packing, the bottom material, And providing a package.

  As a result of intensive studies in view of the above problems, the present inventor has found that the above problems can be easily solved by adopting a specific configuration, and the present invention has been completed.

  That is, the gist of the present invention is an outermost layer composed of an amorphous polyester resin layer, an intermediate layer composed of a polyamide resin (PA) layer and a saponified ethylene-vinyl acetate copolymer (EVOH) layer, and cohesive failure. A film having a laminated structure having an easy peel layer as an innermost layer, wherein the PA layer is composed of a mixture of amorphous polyamide resin in an amount of 40 to 80% by weight and crystalline polyamide resin in an amount of 20 to 60% by weight. The film for deep drawing, wherein the thickness of the inner layer of the PA layer is larger than the thickness of the layer, the thickness of the PA layer is 5 to 20 μm, and the thickness of the entire film is 40 to 70 μm, A bottom material for a deep-drawn packaging body characterized by being formed by the film for deep-drawing molding, a deep-drawing packaging body characterized by using the bottom material as a component, and shifting the deep-drawing packaging body Then, 2-5 pieces are arranged, and an adhesive label is stuck on the bottom material side and the lid material side.

  According to the composite film for deep drawing of the present invention, it was possible to provide a deep drawing film having a hard heat seal and good curl immediately after packing without impairing deep drawability.

  The “amorphous polyester resin” constituting the outermost layer of the film of the present invention refers to a polyester resin in which 5 mol% or more of 1,4-cyclohexanedimethanol component is contained in 100 mol% of a polyhydric alcohol component. From the viewpoint of increasing the degree of amorphousness, it is desirable that the 1,4-cyclohexanedimethanol component is contained in an amount of 10 mol% or more, preferably 12 mol% or more, more preferably 15 mol% or more. On the other hand, if the 1,4-cyclohexanedimethanol component is too much, the impact strength of the film will decrease, so the upper limit is preferably 50 mol%, more preferably 47 mol% or less, and 45 mol. % Or less is more preferable.

  In the film of the present invention, in consideration of tear resistance, impact strength, heat resistance, etc., the ethylene terephthalate unit is 50 mol% or more, preferably 55 mol% or more in 100 mol% of the unit constituting the amorphous polyester resin. Further, it is preferable to select so as to be 60 mol% or more. Therefore, 50 mol% or more of terephthalic acid component (component formed from terephthalic acid or its ester) in 100 mol% of polyvalent carboxylic acid component, and 50 mol% or more of ethylene glycol component in 100 mol% of polyhydric alcohol component The content is preferably 55 mol% or more, more preferably 60 mol% or more and 95 mol% or less, preferably 90 mol% or less, more preferably 88 mol% or less.

  Examples of the polyhydric alcohol for forming the polyhydric alcohol component include 1,3-propanediol, triethylene glycol, and 1,4-butanediol in addition to the above-described 1,4-cyclohexanedimethanol and ethylene glycol. 1,6-hexanediol, 3-methyl-1,5-pentanediol, neopentyl glycol, 2-methyl-1,5-pentanediol, 2,2-diethyl-1,3-propanediol, 1,9 -Alkylene glycols such as nonanediol and 1,10-decanediol, trimethylolpropane, glycerin, pentaerythritol, diethylene glycol, dimer diol, polyoxytetramethylene glycol, polyethylene glycol, bisphenol compounds or their derivatives Such as de adducts it can also be used in combination.

  In addition to the above-mentioned terephthalic acid and esters thereof, aromatic dicarboxylic acids, aliphatic dicarboxylic acids and ester forming derivatives thereof can be used as the polyvalent carboxylic acids for forming the polyvalent carboxylic acid component. Examples of the aromatic dicarboxylic acid include isophthalic acid, naphthalene-1,4-dicarboxylic acid, naphthalene-2,6-dicarboxylic acid, and 5-sodium sulfoisophthalic acid. Moreover, derivatives of these aromatic dicarboxylic acids and terephthalic acids include derivatives such as dialkyl esters and diaryl esters. Examples of the aliphatic dicarboxylic acid include glutaric acid, adipic acid, sebacic acid, azelaic acid, oxalic acid, succinic acid and the like, and an aliphatic dicarboxylic acid usually called dimer acid. Furthermore, an oxycarboxylic acid such as p-oxybenzoic acid, and a polyvalent carboxylic acid such as trimellitic anhydride and pyromellitic anhydride may be used in combination as necessary.

  In addition, although not polyhydric alcohols or polycarboxylic acids, lactones represented by ε-caprolactone may be used in part. Lactones are those that ring-open to become units having ester bonds at both ends, and a unit derived from one lactone can be considered to be a carboxylic acid component and an alcohol component. Therefore, when lactones are used, the amount of 1,4-cyclohexanedimethanol component and the amount of other polyhydric alcohol components are the total amount of polyhydric alcohol components of the film plus the unit amount derived from lactones. Calculated as 100 mol%. Also, when calculating the amount of each polycarboxylic acid component, the amount obtained by adding the unit amount derived from the lactone to the total polycarboxylic acid component amount of the film is 100 mol%.

  For example, a polyethylene terephthalate glycol resin (PETG) in which the diol component is composed of 1,4-cyclohexanedimethyl alcohol and ethylene glycol and the dicarboxylic acid component is composed of terephthalic acid can be suitably used as the amorphous polyester resin of the present invention.

  The thickness of the amorphous polyester resin layer is not particularly limited, but is usually 10% or more of the total thickness, preferably 15% or more, more preferably 20% or more, and usually 60% or less, preferably 50% or less, more preferably 40% or less. If the thickness is 10% or more, the occurrence of curling in the flange portion of the package can be suppressed, a good appearance can be obtained, and a good deep drawability can be maintained by setting the upper limit to 60%.

  The film of the present invention needs to be provided with at least one PA layer in the intermediate layer for the purpose of imparting pinhole resistance and deep drawability and suppressing curling of the flange portion. The polyamide resin (PA) layer needs to be a mixture of an amorphous polyamide resin and a crystalline polyamide resin. The ratio of the amorphous polyamide resin is 40% or more, preferably 45% or more, more preferably 50%, and 80% or less, preferably 70% or less, more preferably 65% or less. When the ratio of the amorphous polyamide resin exceeds 40%, the curling of the flange portion can be suppressed, and the pinhole resistance can be maintained by setting it to 80% or less.

  The amorphous polyamide resin is not particularly limited as long as it does not show a clear melting peak temperature when measured according to JIS K7121, but 6I-6T nylon is preferably used.

  The crystalline polyamide resin is not particularly limited, but nylon resin (Ny) is preferably used from the viewpoint of pinhole resistance. As Ny, for example, 4 nylon, 6 nylon, 7 nylon, 11 nylon, 12 nylon, 46 nylon, 66 nylon, 69 nylon, 610 nylon, 611 nylon, 6T nylon, 6I nylon, MXD6 nylon, 6-66 nylon, 6-610 nylon, 6-611 nylon, 6-12 nylon, 6-612 nylon, 6-6T nylon, 6-6I nylon, 6-66-610 nylon, 6-66-12 nylon, 6-66-612 nylon Furthermore, a mixture thereof can be mentioned. Among them, it is preferable to use 6 nylon or 6-66 nylon.

  The polyamide resin (PA) layer thickness is preferably 5 μm or more, and more preferably 8 μm or more. Moreover, 20 micrometers or less are preferable and 15 micrometers or less are more preferable. By making the thickness of the PA layer 5 μm or more, curling in the flange portion of the package can be suppressed and good appearance can be obtained, and by making the thickness 20 μm or less, good deep drawability can be maintained. it can.

  The thickness of the inner layer of the polyamide resin (PA) layer needs to be thicker than the thickness of the outer layer of the polyamide resin (PA) layer. Since the polyamide resin (PA) layer having a high elastic modulus is outside the center of the entire layer, the occurrence of curling in the flange portion of the package can be suppressed, and a good appearance can be obtained.

  An EVOH layer is disposed on the intermediate layer for the purpose of imparting oxygen barrier properties. The ethylene content of EVOH used in the EVOH layer is not particularly limited, but is preferably 27 to 47 mol%, more preferably 32 to 44 mol% from the viewpoint of film formation stability. The EVOH saponification degree is preferably 90% or more, more preferably 95 mol% or more. By maintaining the ethylene content of EVOH and the saponification degree within the above ranges, the coextrudability of the film of the present invention and the strength of the film can be improved.

  The thickness of the EVOH layer is not particularly limited, but is usually 3 μm or more, preferably 5 μm or more, and usually 15 μm or less, preferably 10 μm or less. By setting the lower limit value of the EVOH layer thickness to 3 μm, sufficient oxygen barrier properties can be obtained, and by setting the upper limit value to 15 μm, the coextrudability of the film is not deteriorated and good film strength is maintained. it can.

  The resin constituting the easy peel (EP) layer of the film of the present invention is not particularly limited as long as it has a cohesive fracture property. Examples of such a resin include a blend of LLDPE and polybutene, a blend of EVA and PP, a blend of PP and LDPE, a blend of PP and ionomer, a blend of PP and EAA, a blend of PP and EMMA, and the like. Among them, a blend of LLDPE and polybutene or a blend of PP and LDPE can be preferably used.

  The thickness of the EP layer is usually 2 μm or more, preferably 3 μm or more, more preferably 4 μm or more, and usually 15 μm or less, preferably 12 μm or less, more preferably 10 μm or less, from the viewpoint of film forming properties and peel appearance. . By making the thickness of the EP layer 2 μm or more, stable film forming properties can be obtained, and by making the thickness of the EP layer 15 μm or less, fluffing and film residue can hardly occur at the time of peeling. A peeled appearance is obtained.

  The easy peel strength of the EP layer may be such that cohesive failure occurs on the peeled surface when peeled and the peeled surface is not fluffed. For example, at 25 ° C., usually 0.8 N / 15 mm width or more, preferably 1.0 N / 15 mm width or more, more preferably 1.2 N / 15 mm width or more, usually 5.0 N / 15 mm width or less, preferably 4.5 N / 15 mm width or less, more preferably 4.0 N / 15 mm width or less. It is.

  In addition, an ethylene-vinyl acetate copolymer (EVA) layer or a polyethylene (PE) layer can be disposed on the intermediate layer for the purpose of imparting flexibility. Although the ethylene content of EVA is not particularly limited, it is preferably 1.5 mol% or more and 20 mol% or less, preferably 3 mol% or more and 15 mol% or less from the viewpoint of film formation stability. Further preferred.

  When the PE layer is disposed in the intermediate layer, the PE used in the PE layer is not particularly limited. For example, low density polyethylene (LDPE), linear low density polyethylene (LLDPE), high density polyethylene (HDPE), or a blend thereof can be used.

  In the film of the present invention, at least one adhesive resin layer may be disposed between the outermost layer (amorphous polyester resin layer) and the intermediate layer, or between the innermost layer (EP layer) and the intermediate layer. it can. Further, from the viewpoint of further increasing the interlayer adhesive strength, between the EVOH layer and the PE layer of the intermediate layer, or between the PA layer and the PE layer, between the amorphous polyester resin layer and the EVOH layer, the amorphous polyester resin It is preferable to dispose an adhesive resin layer between the layer and the PA layer.

  If the adhesive resin used in the adhesive resin layer can adhere the amorphous polyester layer, the EP layer, and various resin layers (PP layer, EVOH layer, PA layer, PE layer) constituting the intermediate layer with the required strength, There is no particular limitation. A polyolefin resin modified with an unsaturated carboxylic acid or a derivative thereof is preferable. Examples of the unsaturated carboxylic acid include acrylic acid, methacrylic acid, maleic acid, fumaric acid, crotonic acid, itaconic acid, citraconic acid and the like. In addition, an ester or anhydride of the unsaturated carboxylic acid can be used as an adhesive resin, and as derivatives, methyl acrylate, methyl methacrylate, ethyl acrylate, propyl acrylate, butyl acrylate, butyl methacrylate, vinyl acetate. , Glycidyl acrylate, glycidyl methacrylate, acrylamide, methacrylamide, sodium acrylate and the like can be used.

  As a commercially available adhesive resin, the Mitsui Chemicals Co., Ltd. make and brand name Admer are mentioned, for example, These can be used conveniently. Among them, special polyolefin-based ones are useful when bonding PP layers, PE layers, EVOH layers and amorphous polyester layers. Furthermore, when bonding EVOH layers, PP layers and PE layers, the LLDPE type Or a PP type thing can be used conveniently.

  The film of the present invention is an inorganic particle such as silica, talc, kaolin, calcium carbonate, or the like for the purpose of improving and adjusting various properties such as molding processability and productivity within a range that does not significantly impair the effects of the present invention. Add additives such as pigments such as titanium and carbon black, flame retardants, weather resistance stabilizers, heat stabilizers, antistatic agents, melt viscosity improvers, crosslinking agents, lubricants, nucleating agents, plasticizers, anti-aging agents, etc. it can.

  The layer structure of the film of the present invention comprises an amorphous polyester resin layer as an outermost layer, at least one polyamide resin (PA) layer as an intermediate layer and one ethylene-vinyl acetate copolymer saponified product (EVOH) layer. Including at least an easy peel layer having cohesive failure as an innermost layer, and the polyamide resin (PA) layer is more than 40% by weight of the amorphous polyamide resin and 80% by weight or less and 20% by weight or more of the crystalline polyamide resin 60 The polyamide resin (PA) layer is thicker than the outer layer thickness of the polyamide resin (PA) layer, and the polyamide resin (PA) layer thickness is 5 μm or more and 20 μm. If the thickness of the film is 40 μm or more and 70 μm or less, the layer structure of the other layers is not particularly limited.

  For example, when represented by an amorphous polyester resin layer (A), PA layer (B), EVOH layer (C), PE layer (D), easy peel layer (E), and adhesive resin layer (F), The layer structure can be formed.

(1) A / F / B / C / F / E
(2) A / F / B / C / F / D / E
(3) A / F / C / B / F / D / E
(4) A / F / C / B / F / E
(5) A / F / B / C / B / F / D / E
(6) A / F / B / F / C / F / D / E

  Among the above, a preferable layer configuration is (2), (3), (4) or (5), and more preferably (2) or (3).

  The deep drawing composite film of the present invention can be produced using a known method. For example, an extrusion lamination method, a coextrusion inflation method, a coextrusion T die method, and the like can be used, and it is particularly preferable to use a coextrusion T die method.

  The film of the present invention can be used for a deep drawn package by molding. In particular, when the film of the present invention is used as the bottom material of a deep drawn package, a good deep drawn package can be obtained. The lid of the deep drawn package of the present invention is not particularly limited as long as the easy peel property of the composite film of the present invention can be obtained. For example, a cover material obtained by laminating a stretched polypropylene resin layer, a transparent vapor-deposited polyethylene terephthalate resin, and a linear low density polyethylene (LLDPE) layer, or a stretched polyethylene terephthalate resin and a coextruded film (EVOH, Ny, including LLDPE as a seal layer) Can be mentioned.

When the film of the present invention is used as a bottom material for a deep drawing package, for example, after the film of the present invention is formed into a desired shape and size with a deep drawing mold (film supply step and film forming step), Filled with sliced ham and other contents (content filling process), sealed with a lid film (cover film supply process and sealing process), vacuum packaged (vacuum packaging process), and cooled. (Cooling step) By cutting (cutting step), a deep-drawn package can be produced.

Examples of the present invention will be described below, but the present invention is not limited thereto.
Example 1:
(Preparation of deep drawing composite film)
A film having the following layer constitution was obtained by co-extrusion of all layers, and Example 1 was obtained.
PETG (15 μm) / Adhesive resin (5 μm) / Ny1 (10 μm) / EVOH1 (10 μm) / Adhesive resin (5 μm) / PE1 (10 μm) / EP1 (5 μm)
PETG: PETG manufactured by Eastman Chemical Company
Adhesive resin: Mitsui Chemicals Admer Ny1: DSM Japan Engineering Plastics Novamid 66Ny blend of 6-66 copolymer Ny (50%) and 6I-6T nylon (50%) EVOH1: Kuraray Eval 38mol type PE1 : Nippon Polyethylene Novatec LL
EP1: Blend of LLDPE (60%) and polybutene (40%) LLDPE: Novatec LL made by Nippon Polyethylene
Polybutene: Mitsui Chemicals Toughmer

Example 2:
A film having the following layer constitution was obtained by coextrusion of all layers, and was designated as Example 2.
PETG (10 μm) / Adhesive resin (5 μm) / EVOH2 (5 μm) / Ny1 (10 μm) / Adhesive resin (5 μm) / EVA1 (20 μm) / EP1 (5 μm)
EVOH2: Kuraray Eval 32 mol type EVA1: Nippon Polyethylene Novatec EVA

Example 3:
A film having the following layer constitution was obtained by coextrusion of all layers, and Example 3 was obtained.
PETG (10 μm) / Adhesive resin (5 μm) / Ny2 (10 μm) / EVOH2 (5 μm) / Ny2 (5 μm) / Adhesive resin (5 μm) / EVA1 (20 μm) / EP2 (5 μm)
Ny2: BM Japan engineering plastic Novamid 66Ny blend of 6-66 copolymer Ny (30%) and 6I-6T nylon (70%) with 15% ratio EP2: LDPE (60%) and random copolymer PP (40%) Blend of
LDPE: Nippon Polyethylene Novatec LD
Random copolymer PP: Novatec PP made by Nippon Polypro

Example 4:
A film having the following layer constitution was obtained by co-extrusion of all layers, and Example 4 was obtained.
PETG (15 μm) / Adhesive resin (15 μm) / Ny1 (10 μm) / EVOH2 (10 μm) / Adhesive resin (5 μm) / EVA1 (15 μm) / EP1 (5 μm)

Comparative Example 1:
A film having the following layer structure was obtained by coextrusion of all layers, and was designated as Comparative Example 1.
PETG (15 μm) / Adhesive resin (5 μm) / Ny3 (10 μm) / EVOH1 (10 μm) / Adhesive resin (5 μm) / PE1 (10 μm) / EP1 (5 μm)
Ny3: DM Japan Engineering Plastics Novamid 66Ny 6-66 copolymerized Ny with 15% ratio

Comparative Example 2:
A film having the following layer structure was obtained by coextrusion of all layers, and was designated as Comparative Example 2.
PETG (10 μm) / Adhesive resin (5 μm) / EVOH1 (10 μm) / Ny4 (10 μm) / Adhesive resin (5 μm) / PE1 (25 μm) / EP1 (5 μm)
Ny4: BM Japan engineering plastic Novamid 66Ny blend of 6-66 copolymer Ny (70%) and 6I-6T nylon (30%) with 15% ratio

Comparative Example 3:
A film having the following layer structure was obtained by coextrusion of all layers, and was designated as Comparative Example 3.
PETG (25 μm) / Adhesive resin (5 μm) / EVOH1 (10 μm) / Ny2 (10 μm) / Adhesive resin (5 μm) / EVA1 (10 μm) / EP1 (5 μm)

Comparative Example 4:
A film having the following layer structure was obtained by coextrusion of all layers, and was designated as Comparative Example 4.
PETG (15 μm) / Adhesive resin (5 μm) / Ny1 (3 μm) / EVOH1 (10 μm) / Adhesive resin (5 μm) / PE1 (17 μm) / EP1 (5 μm)

Comparative Example 4:
A film having the following layer structure was obtained by coextrusion of all layers, and was designated as Comparative Example 4.
PETG (15 μm) / Adhesive resin (5 μm) / Ny3 (10 μm) / EVOH1 (10 μm) / Adhesive resin (5 μm) / HDPE1 (10 μm) / EP1 (5 μm)
HDPE1: Nippon Polyethylene Novatec HD

[Preparation of packed sample]
Slice ham (35 g) having a diameter of 95 mm was vacuum packaged by a deep drawing packaging machine (FV6300 manufactured by Omori Machine Industry Co., Ltd.). The size of the deep drawing portion is a columnar shape having a diameter of 98 mm and a drawing depth of 5 mm. The size of the packed product is 100 mm long and 80 mm wide. Molding heating temperature is 90 ° C. The molding time is 1.5 seconds. The composition of the lid used was as follows. “//” represents adhesion by a dry laminating method.
OPP (30 μm) // Transparent deposition PET (12 μm) // LLDPE (40 μm)
OPP: OPU-1 (biaxially stretched by Tosero)
Transparent deposition PET: VM-PET (Toyo Metallizing deposition PET)
LLDPE: L-6102 (Toyobo)

[Evaluation method]
<Heat seal curl>
Within 5 minutes after the preparation of the pack sample, the heat seal portion was flat and the curled portion was 5 mm or more, and x.

<Deep drawability>
In the deep-drawing molding, “○” indicates that the molding was performed as usual, and “×” indicates that the molding was sweet and the corner portion was rounded.

  From Table 1, Examples 1 to 4 had good deep drawability, almost no curling of the heat seal portion of the package immediately after packaging, and the packs were easy to align when a label was applied. On the other hand, in Comparative Examples 1 to 3, the heat seal part immediately after packaging was curled to the bottom material side, so that there was a problem that the package was not well aligned by the labeler of the packaging line and the label was difficult to stick. Further, Comparative Example 4 had poor deep drawability and could not be molded as it was.

  Since the film of the present invention is a film having a finish with good curling of the heat seal portion even when it is thin, it can be suitably used as a film for a deep-drawn package, particularly as a bottom material for a deep-drawn package.

Claims (8)

The outermost layer composed of an amorphous polyester-based resin layer, the intermediate layer composed of a polyamide resin (PA) layer and an ethylene-vinyl acetate copolymer saponified product (EVOH) layer, and the easy peel layer having cohesive failure are used as the innermost layer. The PA layer is composed of a mixture of amorphous polyamide resin in an amount of 40 to 80% by weight and crystalline polyamide resin in an amount of 20 to 60% by weight. A deep drawing film characterized in that the inner layer has a large thickness, the PA layer has a thickness of 5 to 20 μm, and the entire film has a thickness of 40 to 70 μm. The film for deep drawing according to claim 1, wherein the amorphous polyester resin is a polyethylene terephthalate glycol resin (PETG). The deep drawing film according to claim 1 or 2, wherein the intermediate layer comprises at least one ethylene-vinyl acetate copolymer (EVA) layer or polyethylene (PE) layer. The deep drawing film according to any one of claims 1 to 3, which has at least one adhesive resin layer between the outermost layer and the intermediate layer, between the innermost layer and the intermediate layer, and any of the intermediate layers. The film for deep drawing according to any one of claims 1 to 4, wherein an easy peel strength of the easy peel layer is 0.8 to 5.0 N / 15 mm width at 25 ° C. A bottom material for a deep-drawn package, which is formed by the deep-drawing film according to any one of claims 1 to 5. A deep drawn package comprising the bottom material according to claim 6 as a constituent element. A package comprising the deep-drawn package according to claim 7 arranged in a shifted manner, and adhesive labels attached to the bottom material side and the lid material side.