WO2014084248A1 - 冷間成形用包材およびそれを用いたプレススルーパック - Google Patents
冷間成形用包材およびそれを用いたプレススルーパック Download PDFInfo
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- WO2014084248A1 WO2014084248A1 PCT/JP2013/081884 JP2013081884W WO2014084248A1 WO 2014084248 A1 WO2014084248 A1 WO 2014084248A1 JP 2013081884 W JP2013081884 W JP 2013081884W WO 2014084248 A1 WO2014084248 A1 WO 2014084248A1
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- WIPO (PCT)
- Prior art keywords
- polyamide resin
- resin film
- aluminum foil
- packaging material
- strain
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes or webs of flexible sheet material, e.g. in folded wrappers
- B65D75/28—Articles or materials wholly enclosed in composite wrappers, i.e. wrappers formed by associating or interconnecting two or more sheets or blanks
- B65D75/30—Articles or materials enclosed between two opposed sheets or blanks having their margins united, e.g. by pressure-sensitive adhesive, crimping, heat-sealing, or welding
- B65D75/32—Articles or materials enclosed between two opposed sheets or blanks having their margins united, e.g. by pressure-sensitive adhesive, crimping, heat-sealing, or welding one or both sheets or blanks being recessed to accommodate contents
- B65D75/36—Articles or materials enclosed between two opposed sheets or blanks having their margins united, e.g. by pressure-sensitive adhesive, crimping, heat-sealing, or welding one or both sheets or blanks being recessed to accommodate contents one sheet or blank being recessed and the other formed of relatively stiff flat sheet material, e.g. blister packages, the recess or recesses being preformed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/34—Layered products comprising a layer of synthetic resin comprising polyamides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
- B32B15/088—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising polyamides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
- B65D65/38—Packaging materials of special type or form
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/31—Heat sealable
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/514—Oriented
- B32B2307/518—Oriented bi-axially
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/54—Yield strength; Tensile strength
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/724—Permeability to gases, adsorption
- B32B2307/7242—Non-permeable
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/726—Permeability to liquids, absorption
- B32B2307/7265—Non-permeable
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/738—Thermoformability
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2439/00—Containers; Receptacles
- B32B2439/40—Closed containers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2439/00—Containers; Receptacles
- B32B2439/80—Medical packaging
Definitions
- the present invention relates to a cold forming packaging material and a press-through pack using the same.
- the press-through pack includes a container 3 having a plurality of recesses 2 for storing the drug 1 and the like, and a thin film-like lid member 4 for closing the openings of the plurality of recesses collectively.
- an aluminum foil has been used as a material for the container 3 in order to provide a gas barrier property and moisture-proof property to improve the storage stability of the drug.
- the aluminum foil itself has poor formability and is easily broken. For this reason, it has been proposed to use a laminated sheet obtained by laminating a biaxially stretched polyamide resin film on one surface of an aluminum foil as the material of the container 3 (Patent Document 1).
- the container is obtained by pressing the laminated sheet from the aluminum foil side in a room temperature environment, that is, by cold forming the laminated sheet.
- a heat seal layer containing a heat-adhesive resin such as polyvinyl chloride is formed on the surface of the laminated sheet opposite to the surface of the aluminum foil on the polyamide resin film side. Is done.
- Patent Document 1 a tubular method is used as a method for stretching a polyamide resin film, but as a method for stretching a polyamide resin film, there is a tenter method in addition to the tubular method.
- the tenter method is advantageous in terms of productivity as compared with the tubular method.
- the present invention is capable of suppressing breakage of the aluminum foil during cold forming when using a polyamide resin film biaxially stretched by the tenter method. It aims at providing the packaging material for cold forming excellent in the moldability. Another object of the present invention is to provide a highly reliable press-through pack using the above-mentioned cold forming packaging material.
- the gist of the present invention is as follows. (1) including a polyamide resin film biaxially stretched by a tenter method, an aluminum foil disposed on one surface of the polyamide resin film and integrated with the polyamide resin film, A cold-forming packaging material, wherein the polyamide resin film has a strain of 20% or more and 45% or less when a tension corresponding to a tensile breaking tension of the aluminum foil is applied.
- the present invention when a polyamide resin film biaxially stretched by the tenter method is used, it is possible to suppress breakage of the aluminum foil at the time of cold forming, and for cold forming excellent in cold formability.
- Packaging material can be provided. Further, by using this cold forming packaging material, a highly reliable press-through pack can be provided.
- the packaging material (laminated sheet) of the present invention is composed of at least a polyamide resin film biaxially stretched by a tenter method and an aluminum foil disposed on one surface of the polyamide resin film and integrated with the polyamide resin film.
- the distortion (hereinafter simply referred to as strain A) of the polyamide resin film when a tension corresponding to the tensile breaking tension of the aluminum foil is applied to the polyamide resin film is set within a range of 20 to 45%.
- the strain A refers to a strain of the polyamide resin film after being biaxially stretched by the tenter method and before being integrated with the aluminum foil.
- the inventors of the present invention focused on the relationship between the tensile breaking tension of the aluminum foil and the distortion (elongation rate during tension) of the polyamide resin film. And when the strain A is within the above range, the present inventors press the above-mentioned laminated sheet from the aluminum foil side in a room temperature environment to form a plurality of recesses. It has been found that breakage of the aluminum foil in the vicinity of the peripheral portion is suppressed, and cold formability is greatly improved.
- the tensile breaking tension is a tensile load when a film-like or foil-like sample (15 mm width) is broken in a tensile test.
- the packaging material of the present invention is excellent in cold formability, a highly reliable container can be obtained without breaking the aluminum foil during cold forming.
- the cold forming packaging material of the present invention is suitably used for a press-through pack provided with a container having a plurality of recesses for storing chemicals and the like.
- the strain A exceeds 45%, the polyamide resin film tends to be excessively stretched, and the aluminum foil is easily broken. If the strain A is less than 20%, the polyamide resin film will be difficult to stretch excessively, cold forming itself will be difficult, the polyamide resin film will break during molding, and the aluminum foil will break as the polyamide resin film breaks. It becomes easy.
- the strain A is preferably 25 to 45%, more preferably 30 to 40%, since a large deformation in the vicinity of the peripheral edge of the bottom of the concave portion of the container can be suppressed.
- distortion A (%) represents the elongation rate by tension
- Strain A (%) (dimension after tension ⁇ dimension before tension) / (dimension before tension) ⁇ 100
- the dimension in the above formula is the dimension in the machine direction (MD) or the transverse direction (TD) of the biaxially stretched polyamide resin film.
- the longitudinal strain A (%) is obtained by (vertical dimension after tension ⁇ vertical dimension before tension) / (longitudinal dimension before tension) ⁇ 100.
- A) is obtained by (lateral dimension after tension ⁇ lateral dimension before tension) / (lateral dimension before tension) ⁇ 100.
- the strain A needs to be in the range of 20 to 45% in both the machine direction (MD) and the transverse direction (TD). If the strain A is within the above range, the longitudinal strain A and the lateral strain A may be different from each other. From the viewpoint of physical property (strength) balance, it is preferable that the vertical strain A is substantially the same as the horizontal strain A.
- the polyamide resin is composed of a polymer formed by amide bonding of a plurality of monomers.
- Examples of the polyamide resin include nylon 6, nylon 66, nylon 11, nylon 12, nylon 610, and nylon 612. Among these, nylon 6 is preferable from the viewpoint of cold formability, productivity, and strength.
- the polyamide resin preferably has a relative viscosity (20 ° C.) of 2.0 to 3.5. If the relative viscosity of the polyamide resin is more than 3.5, the pressure loss during filtration of the molten resin is large, extra extrusion energy is required, and the production cost increases. If the relative viscosity of the polyamide resin is less than 2.0, the tensile strength and impact strength tend to decrease.
- the relative viscosity here refers to a sample solution (liquid temperature 20 ° C.) in which a polymer is dissolved in 96% sulfuric acid at a concentration of 1.0 g / dL, using a predetermined viscometer (for example, an Ubbelohde viscometer). The value obtained when measured.
- the thickness T1 of the biaxially stretched polyamide resin film is preferably 12 to 30 ⁇ m, preferably 15 to More preferably, it is 30 ⁇ m.
- the thickness T1 of the polyamide resin film is 12 ⁇ m or more, the polyamide resin film does not break during cold forming.
- the thickness T1 of the polyamide resin film is 30 ⁇ m or less, the concave portion can be easily cold formed.
- the aluminum foil may be a single aluminum foil or an aluminum alloy foil.
- the aluminum alloy contains a small amount or a trace amount of different elements in addition to the main component of aluminum.
- the different elements include Fe, Si, Cu, Ni, Cr, Ti, Zr, Zn, Mn, Mg, and Ga. These may be used alone or in combination of two or more. Among these, Fe is preferable from the viewpoint of cold formability.
- the thickness T2 of the aluminum foil is preferably 20 to 60 ⁇ m, and preferably 30 to 50 ⁇ m. More preferred. When the thickness T2 of the aluminum foil is 20 ⁇ m or more, breakage of the aluminum foil during cold forming is suppressed. When the thickness T2 of the aluminum foil is 60 ⁇ m or less, the concave portion is easily cold formed.
- the ratio of the thickness T1 of the polyamide resin film to the thickness T2 of the aluminum foil: T1 / T2 is preferably 0.4 to 1.0, preferably 0.4 to 0.8. Is more preferable.
- an adhesive layer is formed between the polyamide resin film and the aluminum foil.
- a packaging material in which the polyamide resin film and the aluminum foil are firmly adhered to each other is obtained.
- the adhesive layer is formed using, for example, a reactive adhesive. Since an adhesive layer excellent in adhesion and flexibility can be obtained, it is preferable to use a two-component polyurethane adhesive as the reactive adhesive.
- a polyol main agent such as polyester polyol and polyether polyol and a polyisocyanate curing agent such as aliphatic polyisocyanate or aromatic polyisocyanate are used.
- the adhesive layer formed between the polyamide resin film and the aluminum foil has a thickness of 0.2 to 5 ⁇ m. preferable.
- the heat seal layer is made of, for example, polyvinyl chloride, polyethylene, or polypropylene. Of these, polyvinyl chloride is more preferable in terms of moldability and moisture resistance. It is preferable that an adhesive layer similar to the above is also formed between the aluminum foil and the heat seal layer. A packaging material in which the aluminum foil and the heat seal layer are firmly adhered to each other is obtained. From the viewpoint of the cold formability of the packaging material and the adhesion between the aluminum foil and the heat seal layer, the adhesive layer formed between the aluminum foil and the heat seal layer has a thickness of 0.2 to 5 ⁇ m. preferable.
- the method for producing a biaxially stretched polyamide resin film of the present invention may include a process such as a known relaxation process (heat setting process or relaxation process) in addition to the biaxial stretching process by the tenter method.
- the biaxial stretching by the tenter method may be simultaneous biaxial stretching in which the longitudinal stretching step and the lateral stretching step are simultaneously performed, and after the longitudinal stretching step is performed, the lateral stretching step is sequentially performed.
- Biaxial stretching may be used.
- both the longitudinal direction and the transverse direction may be stretched by the tenter method, and after the longitudinal direction is stretched by the roll method, the transverse direction may be stretched by the tenter method.
- the strain A can be adjusted, for example, by changing the stretching ratio (TD ratio and MD ratio) of the polyamide resin film, the heat setting temperature during the heat setting process after stretching, and the relaxation rate during the relaxation process. For example, when the stretching ratio in the machine direction and / or the transverse direction is increased or decreased, the strain A in the machine direction and / or the transverse direction is reduced or increased. For example, increasing or decreasing the heat set temperature increases or decreases strain A. For example, increasing or decreasing the relaxation rate decreases or increases the distortion A. In the case of the draw ratio and the relaxation rate, the longitudinal strain A and the lateral strain A can be individually adjusted. In the case of the heat set temperature, both the longitudinal strain A and the lateral strain A can be adjusted simultaneously. The strain A may be adjusted by changing the thickness of the aluminum foil.
- the stretch ratio (TD ratio and MD ratio) of the polyamide resin film is preferably 2 times or more and less than 3 times, more preferably 2.5 times or more and less than 3.0 times. If the draw ratio is 3 times or more, which is generally used, the strain A becomes too small, so that the aluminum foil is liable to break at the time of molding or delamination tends to occur. When the draw ratio is less than 2 times, the thickness uniformity of the polyamide resin film is impaired, so that a large deformation occurs locally during molding, and the aluminum foil may break.
- the press-through pack of the present invention uses the above packaging material. More specifically, the press-through pack of the present invention includes a container having a plurality of recesses (housing portions) obtained by pressing (cold forming) the above-described packaging material from the aluminum foil side, and a plurality of the containers in the container. A thin film-like lid member that collectively closes the openings of the recesses.
- the packaging material is cold-formed so that an aluminum foil is disposed on the inner surface side (lid material side) of the container.
- lid material for example, an aluminum foil is used.
- the press-through pack is obtained, for example, by bonding the above container and the above lid material through a heat seal layer formed on one surface of the container.
- the recess is, for example, substantially cylindrical (diameter 5 to 20 mm, and depth 2 to 8 mm).
- the plurality of recesses are provided at regular intervals of 6 to 20 mm, for example. Further, the recess may have a substantially elliptical column shape.
- Example 1 Production of biaxially stretched polyamide resin film An unstretched polyamide resin film (thickness 190 ⁇ m) was sequentially biaxially stretched. Specifically, the polyamide resin film is stretched by 2.8 times in the machine direction (MD) at 60 ° C. by a roll method, and then stretched by 2.8 times in the transverse direction (TD) at 90 ° C. by a tenter stretching method. did. A1030BRF (relative viscosity (20 ° C.): 3.0) manufactured by Unitika Ltd. was used as the polyamide resin.
- MD machine direction
- TD transverse direction
- the stretched polyamide resin film was subjected to a heat setting process at a temperature of 203 ° C., and further subjected to a relaxation process in the TD direction by adjusting the relaxation rate to 5%.
- the distortion A in the vertical direction and the horizontal direction became the values shown in Table 1. In this way, a sequential biaxially stretched polyamide resin film having a thickness of 25 ⁇ m was produced.
- the biaxially stretched polyamide resin film obtained above is attached to one surface of an aluminum foil (thickness 30 ⁇ m), and polyvinyl chloride (PVC) for thermal bonding.
- a film (thickness 60 ⁇ m) was attached to the other surface of the aluminum foil.
- a polyurethane adhesive with an appropriate amount of methyl ethyl ketone added was used for the pasting.
- the polyurethane-based adhesive includes 100 parts by weight of a polyol based agent (manufactured by Toyo Morton Co., Ltd., TM-K55), and 10.5 parts by weight of a polyisocyanate curing agent (manufactured by Toyo Morton Co., Ltd., CAT-10L).
- a polyol based agent manufactured by Toyo Morton Co., Ltd., TM-K55
- a polyisocyanate curing agent manufactured by Toyo Morton Co., Ltd., CAT-10L
- Example 2 A packaging material was produced in the same manner as in Example 1 except that the thickness of the aluminum foil was changed to 40 ⁇ m.
- the distortion A in the vertical direction and the horizontal direction are the values shown in Table 1.
- Example 3 A packaging material was produced in the same manner as in Example 2 except that the transverse draw ratio was adjusted to 3.6 times and the heat setting temperature was adjusted to 185 ° C.
- the strain A in the lateral direction was a value shown in Table 1.
- Example 4 A packaging material was produced in the same manner as in Example 2 except that the stretching ratio in the longitudinal direction was adjusted to 3.0.
- the longitudinal strain A was a value shown in Table 1.
- Example 5 A packaging material was produced in the same manner as in Example 3 except that the heat setting temperature was adjusted to 195 ° C. and the relaxation rate was adjusted to 7%.
- the longitudinal strain A was a value shown in Table 1.
- Example 6 An unstretched polyamide resin film (thickness 190 ⁇ m) was simultaneously biaxially stretched. Specifically, after an unstretched polyamide resin film is subjected to a water absorption treatment to a moisture content of 4%, it is longitudinally (MD) 2.8 times and transversely (TD) at 180 ° C. by a linear motor type tenter stretching method. The polyamide resin film was stretched 2.8 times. Thereafter, the stretched polyamide resin film was subjected to a heat setting treatment at a temperature of 203 ° C., and the relaxation rate was adjusted to 5% to perform a relaxation treatment in the TD direction. At this time, the distortion A in the vertical direction and the horizontal direction were values shown in Table 1. In this way, a simultaneous biaxially stretched polyamide resin film having a thickness of 25 ⁇ m was produced. A packaging material was produced in the same manner as in Example 2 except that the biaxially stretched polyamide resin film obtained above was used.
- Comparative Example 1 A packaging material was produced in the same manner as in Example 1 except that the thickness of the aluminum foil was changed to 20 ⁇ m.
- the distortion A in the vertical direction and the horizontal direction are the values shown in Table 1.
- Comparative Example 2 A packaging material was produced in the same manner as in Example 2 except that the transverse draw ratio was adjusted to 3.4 times and the heat setting temperature was adjusted to 211 ° C.
- the longitudinal distortion A was as shown in Table 1.
- Comparative Example 3 According to the same method as in Example 2, except that the trade name “Bonyl RX-25” (stretched by a tubular method) manufactured by Kojin Film & Chemicals Co., Ltd. was used for the simultaneous biaxially stretched polyamide resin film having a thickness of 25 ⁇ m. A packaging material was prepared. The distortion A in the vertical direction and the horizontal direction are the values shown in Table 1.
- Comparative Example 4 A packaging material was produced in the same manner as in Example 4 except that the thickness of the unstretched polyamide resin film was 120 ⁇ m.
- the distortion A in the vertical direction and the horizontal direction were values shown in Table 1.
- Comparative Example 5 A packaging material was produced in the same manner as in Comparative Example 4 except that the thickness of the aluminum foil was 60 ⁇ m.
- the distortion A in the vertical direction and the horizontal direction are the values shown in Table 1.
- Comparative Example 6 A packaging material was produced in the same manner as in Comparative Example 4 except that the thickness of the aluminum foil was 20 ⁇ m.
- the distortion A in the vertical direction and the horizontal direction are the values shown in Table 1.
- Comparative Example 7 A packaging material was prepared in the same manner as in Example 3 except that the thickness of the unstretched polyamide resin film was 150 ⁇ m and the thickness of the aluminum foil was 20 ⁇ m.
- the distortion A in the vertical direction and the horizontal direction are the values shown in Table 1.
- the evaluation results are shown in Table 1.
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- Laminated Bodies (AREA)
Abstract
Description
蓋材4にアルミニウム箔を用いる場合、上記の積層シートにおけるアルミニウム箔のポリアミド樹脂フィルム側の表面と反対側の表面には、例えば、ポリ塩化ビニル等の熱接着性樹脂を含むヒートシール層が形成される。
その結果、冷間成形性が低いという問題があった。
(1)テンター法により二軸延伸されたポリアミド樹脂フィルムと、前記ポリアミド樹脂フィルムの一方の表面に配され、前記ポリアミド樹脂フィルムと一体化したアルミニウム箔とを含み、
前記ポリアミド樹脂フィルムは、前記アルミニウム箔の引張破断張力に相当する張力を与えた場合の歪みが20%以上45%以下であることを特徴とする冷間成形用包材。
(3)(1)または(2)に記載の冷間成形用包材を用いたことを特徴とするプレススルーパック。
本発明の包材は冷間成形性に優れているため、冷間成形時にアルミニウム箔が破断することなく、信頼性の高い容器が得られる。本発明の冷間成形用包材は、薬品等を収納する凹部を複数有する容器を備えたプレススルーパックに好適に用いられる。
容器における凹部の底部の周縁部付近における局所的に大きな変形を抑制できることから、歪みAは、好ましくは25~45%、より好ましくは30~40%である。
歪みA(%)=(引張後の寸法-引張前の寸法)/(引張前の寸法)×100
上記式中の寸法とは、二軸延伸ポリアミド樹脂フィルムの縦方向(MD)または横方向(TD)の寸法である。例えば、縦方向の歪みA(%)は、(引張後の縦方向の寸法-引張前の縦方向の寸法)/(引張前の縦方向の寸法)×100で求められ、横方向の歪み(A)は、(引張後の横方向の寸法-引張前の横方向の寸法)/(引張前の横方向の寸法)×100で求められる。
本発明では、縦方向(MD)および横方向(TD)の両方において歪みAが20~45%の範囲内である必要がある。歪みAが上記範囲内であれば、縦方向の歪みAおよび横方向の歪みAが互いに異なっていてもよい。物性(強度)バランスの観点から、縦方向の歪みAは、横方向の歪みAと略同一であるのが好ましい。
接着剤層は、例えば、反応型の接着剤を用いて形成される。密着性および柔軟性に優れた接着剤層が得られることから、反応型の接着剤には、二液性ポリウレタン系接着剤を用いることが好ましい。二液性ポリウレタン系接着剤には、ポリエステルポリオール、ポリエーテルポリオール等のポリオール系主剤と、脂肪族系ポリイソシアネートまたは芳香族系ポリイソシアネート等のポリイソシアネート系硬化剤とが用いられる。
包材の冷間成形性、およびポリアミド樹脂フィルムとアルミニウム箔との間の密着性の観点から、ポリアミド樹脂フィルムとアルミニウム箔との間に形成される接着剤層は、厚み0.2~5μmが好ましい。
アルミニウム箔とヒートシール層との間にも、上記と同様の接着剤層が形成されるのが好ましい。アルミニウム箔とヒートシール層との間が強固に密着した包材が得られる。
包材の冷間成形性、およびアルミニウム箔とヒートシール層との間の密着性の観点から、アルミニウム箔とヒートシール層との間に形成される接着剤層は、厚み0.2~5μmが好ましい。
テンター法による二軸延伸は、縦方向の延伸工程と横方向の延伸工程とを同時に実施する同時二軸延伸でもよく、縦方向の延伸工程を実施した後、横方向の延伸工程を実施する逐次二軸延伸でもよい。逐次二軸延伸の場合、縦方向および横方向の両方をテンター法で延伸してもよく、縦方向をロール法で延伸した後、横方向をテンター法で延伸してもよい。
延伸倍率およびリラックス率の場合、縦方向の歪みAおよび横方向の歪みAを個別に調整することができる。熱セット温度の場合、縦方向の歪みAおよび横方向の歪みAの両方を同時に調整することができる。
また、アルミニウム箔の厚みを変えて上記の歪みAを調整してもよい。
[評価]
(A)アルミニウム箔の引張破断張力の測定
サンプルを準備し、JIS K 6732に準じた引張破断強度の測定方法を用い、サンプルが破断した時の引張荷重をサンプルの断面積ではなくサンプルの幅で規格化して、引張破断張力(N/15mm)を求めた。
サンプル幅は15mm、引張速度は100mm/minとした。
引張荷重を縦方向に加えるサンプルと、横方向に加えるサンプルとを準備した。サンプル幅は15mmとした。上記で求めたアルミニウム箔の引張破断張力に相当する引張荷重をポリアミド樹脂フィルムに加えた。この時の引張前後における二軸延伸ポリアミド樹脂フィルムの縦方向および横方向の寸法を測定し、下記式により縦方向の歪みAおよび横方向の歪みA(%)を求めた。
歪みA(%)=(引張後の寸法-引張前の寸法)/(引張前の寸法)×100
1ton卓上サーボプレス機(山岡製作所(株)製、SBN-1000)を用いて、包材(積層シート)をPVCフィルム側から冷間成形することで成形性を評価した。評価には115mm×115mmサイズの金型を用い、成型速度を50mm/sec、絞り深さは6mmとした。
この時、アルミニウム箔の破断の有無、ポリアミド樹脂フィルムの破断の有無、およびデラミネーションの有無を確認した。包材におけるアルミニウム箔およびポリアミド樹脂フィルムの少なくとも一方が破断した場合および/またはデラミネーションが発生した場合を「不可」とし、包材におけるアルミニウム箔およびポリアミド樹脂フィルムのいずれも破断が無く、デラミネーションも無い場合を「良」とした。
(1)二軸延伸ポリアミド樹脂フィルムの作製
未延伸のポリアミド樹脂フィルム(厚み190μm)を逐次二軸延伸した。具体的には、ポリアミド樹脂フィルムを、ロール法により、60℃で縦方向(MD)2.8倍に延伸した後、テンター延伸法により、90℃で横方向(TD)2.8倍に延伸した。ポリアミド樹脂には、ユニチカ社製のA1030BRF(相対粘度(20℃):3.0)を用いた。その後、延伸されたポリアミド樹脂フィルムに対して、203℃の温度で熱セット処理を施し、さらにリラックス率を5%に調整してTD方向のリラックス処理を施した。このとき、縦方向および横方向の歪みAが表1に示す値になった。
このようにして、厚み25μmの逐次二軸延伸ポリアミド樹脂フィルムを作製した。
接着剤を用いて、上記で得られた二軸延伸ポリアミド樹脂フィルムを、アルミニウム箔(厚み30μm)の一方の表面に貼り付け、熱接着用のポリ塩化ビニル(PVC)フィルム(厚み60μm)を、アルミニウム箔の他方の表面に貼り付けた。上記の貼り付けには、ポリウレタン系接着剤にメチルエチルケトンを適量加えたものを用いた。ポリウレタン系接着剤には、ポリオール系主剤(東洋モートン(株)製、TM-K55)100質量部と、ポリイソシアネート系硬化剤(東洋モートン(株)製、CAT-10L)10.5質量部とを用いた。ポリウレタン系接着剤の塗布により、ポリアミド樹脂フィルムとアルミニウム箔との間、およびアルミニウム箔とPVCフィルムとの間に、接着剤層(厚み3μm)を形成した。このようにして、包材(積層シート)を作製した。
アルミニウム箔の厚みを40μmに変えた以外、実施例1と同様の方法により包材を作製した。縦方向および横方向の歪みAは表1に示す値になった。
横方向の延伸倍率を3.6倍に調整し、熱セット温度を185℃に調整した以外、実施例2と同様の方法により包材を作製した。横方向の歪みAは表1に示す値になった。
縦方向の延伸倍率を3.0倍に調整した以外、実施例2と同様の方法により包材を作製した。縦方向の歪みAは表1に示す値になった。
熱セット温度を195℃に調整し、リラックス率を7%に調整した以外、実施例3と同様の方法により包材を作製した。縦方向の歪みAは表1に示す値になった。
未延伸のポリアミド樹脂フィルム(厚み190μm)を同時二軸延伸した。具体的には、未延伸のポリアミド樹脂フィルムを水分率4%に吸水処理した後、リニアモータ式のテンター延伸法により、180℃で、縦方向(MD)2.8倍および横方向(TD)2.8倍にポリアミド樹脂フィルムを延伸した。
その後、延伸されたポリアミド樹脂フィルムに対して、203℃の温度で熱セット処理を施し、リラックス率を5%に調整してTD方向のリラックス処理を施した。このとき、縦方向および横方向の歪みAは表1に示す値になった。
このようにして、厚み25μmの同時二軸延伸ポリアミド樹脂フィルムを作製した。
上記で得られた二軸延伸ポリアミド樹脂フィルムを用いた以外、実施例2と同様の方法により包材を作製した。
アルミニウム箔の厚みを20μmに変えた以外、実施例1と同様の方法により包材を作製した。縦方向および横方向の歪みAは表1に示す値になった。
横方向の延伸倍率を3.4倍に調整し、熱セット温度を211℃に調整した以外、実施例2と同様の方法により包材を作製した。縦方向の歪みAは表1の値になった。
厚み25μmの同時二軸延伸ポリアミド樹脂フィルムに、興人フィルム&ケミカルズ(株)製の商品名「ボニールRX-25」(チューブラー法により延伸)を用いた以外、実施例2と同様の方法により包材を作製した。縦方向および横方向の歪みAは表1に示す値になった。
未延伸のポリアミド樹脂フィルムの厚みを120μmとした以外、実施例4と同様の方法により包材を作製した。縦方向および横方向の歪みAは表1に示す値になった。
アルミニウム箔の厚みを60μmとした以外、比較例4と同様の方法により包材を作製した。縦方向および横方向の歪みAは表1に示す値になった。
アルミニウム箔の厚みを20μmとした以外、比較例4と同様の方法により包材を作製した。縦方向および横方向の歪みAは表1に示す値になった。
未延伸のポリアミド樹脂フィルムの厚みを150μmとし、アルミニウム箔の厚みを20μmとした以外、実施例3と同様の方法により包材を作製した。縦方向および横方向の歪みAは表1に示す値になった。
評価結果を表1に示す。
縦方向の歪みAおよび横方向の歪みAの少なくとも一方が20%未満である比較例1、3、6、7の包材では、成形時にポリアミド樹脂フィルムが破断し、それに伴いアルミニウム箔が破断した。縦方向の歪みAおよび横方向の歪みAの少なくとも一方が45%超である比較例2、4、5の包材では、成形時にアルミニウム箔が破断した。
Claims (3)
- テンター法により二軸延伸されたポリアミド樹脂フィルムと、前記ポリアミド樹脂フィルムの一方の表面に配され、前記ポリアミド樹脂フィルムと一体化したアルミニウム箔とを含み、
前記ポリアミド樹脂フィルムは、前記アルミニウム箔の引張破断張力に相当する張力を与えた場合の歪みが20%以上45%以下であることを特徴とする冷間成形用包材。 - さらに、前記ポリアミド樹脂フィルムと、前記アルミニウム箔との間に、接着剤層が形成されたことを特徴とする請求項1に記載の冷間成形用包材。
- 請求項1または2に記載の冷間成形用包材を用いたことを特徴とするプレススルーパック。
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| Application Number | Priority Date | Filing Date | Title |
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| US14/646,287 US20150298879A1 (en) | 2012-11-30 | 2013-11-27 | Packaging material for cold forming and press-through pack formed using same |
| JP2014549856A JPWO2014084248A1 (ja) | 2012-11-30 | 2013-11-27 | 冷間成形用包材およびそれを用いたプレススルーパック |
| EP13859358.7A EP2927153B1 (en) | 2012-11-30 | 2013-11-27 | Packaging material for cold forming and press-through pack formed using same |
| CN201380053878.5A CN104736451A (zh) | 2012-11-30 | 2013-11-27 | 冷成型用包装材料和使用该冷成型用包装材料的压穿式包装 |
| HK15111270.1A HK1210452A1 (en) | 2012-11-30 | 2013-11-27 | Packaging material for cold forming and press-through pack formed using same |
| KR1020157009949A KR20150090036A (ko) | 2012-11-30 | 2013-11-27 | 냉간 성형용 포장재 및 그것을 사용한 프레스 스루 팩 |
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| US (1) | US20150298879A1 (ja) |
| EP (1) | EP2927153B1 (ja) |
| JP (1) | JPWO2014084248A1 (ja) |
| KR (1) | KR20150090036A (ja) |
| CN (1) | CN104736451A (ja) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015123706A (ja) * | 2013-12-27 | 2015-07-06 | 株式会社Uacj製箔 | アルミニウム箔製包装材料 |
| KR20160122852A (ko) | 2014-12-17 | 2016-10-24 | 유니티카 가부시끼가이샤 | 폴리아미드계 필름 및 그 제조방법 |
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| JP5314139B2 (ja) * | 2008-08-11 | 2013-10-16 | ベーリンガー インゲルハイム インターナショナル ゲゼルシャフト ミット ベシュレンクテル ハフツング | ブリスターパック |
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- 2013-11-27 EP EP13859358.7A patent/EP2927153B1/en active Active
- 2013-11-27 US US14/646,287 patent/US20150298879A1/en not_active Abandoned
- 2013-11-27 JP JP2014549856A patent/JPWO2014084248A1/ja active Pending
- 2013-11-27 HK HK15111270.1A patent/HK1210452A1/xx unknown
- 2013-11-27 WO PCT/JP2013/081884 patent/WO2014084248A1/ja not_active Ceased
- 2013-11-27 CN CN201380053878.5A patent/CN104736451A/zh active Pending
- 2013-11-27 KR KR1020157009949A patent/KR20150090036A/ko not_active Ceased
- 2013-11-29 TW TW102143694A patent/TWI572538B/zh active
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| JPH05318567A (ja) * | 1992-05-19 | 1993-12-03 | Toyo Alum Kk | 容器状成形体 |
| JP2001176459A (ja) * | 1999-12-14 | 2001-06-29 | Nippon Foil Mfg Co Ltd | 二次電池用外装材料及びその製造方法 |
| JP2004058515A (ja) * | 2002-07-30 | 2004-02-26 | Toyo Aluminium Kk | 成形用積層体ならびにそれを用いた容器および包装体 |
| JP2008044209A (ja) * | 2006-08-14 | 2008-02-28 | Idemitsu Unitech Co Ltd | 二軸延伸ナイロンフィルム、ラミネート包材及び二軸延伸ナイロンフィルムの製造方法 |
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| KR20160122852A (ko) | 2014-12-17 | 2016-10-24 | 유니티카 가부시끼가이샤 | 폴리아미드계 필름 및 그 제조방법 |
| EP3235859B1 (en) * | 2014-12-17 | 2020-11-18 | Unitika, Ltd. | Polyamide film and method for producing same |
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| Publication number | Publication date |
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| CN104736451A (zh) | 2015-06-24 |
| JPWO2014084248A1 (ja) | 2017-01-05 |
| TW201433520A (zh) | 2014-09-01 |
| EP2927153B1 (en) | 2018-11-14 |
| KR20150090036A (ko) | 2015-08-05 |
| EP2927153A4 (en) | 2016-07-27 |
| EP2927153A1 (en) | 2015-10-07 |
| US20150298879A1 (en) | 2015-10-22 |
| HK1210452A1 (en) | 2016-04-22 |
| TWI572538B (zh) | 2017-03-01 |
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