WO2005016631A1 - ラミネート金属板とその製造方法 - Google Patents
ラミネート金属板とその製造方法 Download PDFInfo
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- WO2005016631A1 WO2005016631A1 PCT/JP2003/014945 JP0314945W WO2005016631A1 WO 2005016631 A1 WO2005016631 A1 WO 2005016631A1 JP 0314945 W JP0314945 W JP 0314945W WO 2005016631 A1 WO2005016631 A1 WO 2005016631A1
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- film
- melting point
- metal plate
- low
- laminated metal
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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
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
- B32B37/16—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with all layers existing as coherent layers before laminating
- B32B37/20—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with all layers existing as coherent layers before laminating involving the assembly of continuous webs only
- B32B37/203—One or more of the layers being plastic
- B32B37/206—Laminating a continuous layer between two continuous plastic layers
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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
-
- 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
- B32B15/085—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 polyolefins
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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
- B32B15/09—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 polyesters
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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
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
- B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
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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
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/14—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by a layer differing constitutionally or physically in different parts, e.g. denser near its faces
- B32B5/142—Variation across the area of the layer
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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
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/02—Physical, chemical or physicochemical properties
- B32B7/027—Thermal properties
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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
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/03—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers with respect to the orientation of features
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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
- B32B2250/00—Layers arrangement
- B32B2250/40—Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
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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
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/402—Coloured
- B32B2307/4026—Coloured within the layer by addition of a colorant, e.g. pigments, dyes
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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
- B32B2307/70—Other properties
- B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
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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
- B32B2307/70—Other properties
- B32B2307/75—Printability
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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
- B32B2309/00—Parameters for the laminating or treatment process; Apparatus details
- B32B2309/08—Dimensions, e.g. volume
- B32B2309/10—Dimensions, e.g. volume linear, e.g. length, distance, width
- B32B2309/105—Thickness
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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
- B32B2311/00—Metals, their alloys or their compounds
-
- 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
- B32B2439/66—Cans, tins
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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
- B32B2439/00—Containers; Receptacles
- B32B2439/70—Food packaging
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31678—Of metal
Definitions
- the present invention relates to a laminated metal plate in which two types of resins having different melting points are laminated on the front and back of a metal plate used as a container material for food cans and the like, and a method for producing the same.
- a metal plate having a surface coated with a thermoplastic resin such as polyester / polyolefin is often used as a material for containers such as food cans, beverage cans, and aerosol cans.
- a steel plate and an aluminum plate are generally used as the metal plate.
- polyester resins are generally excellent in corrosion resistance, scratch resistance, and printability, and can be applied to both the inner and outer surfaces of cans.However, when the contents are alkaline, There is a problem that the durability of the resin is insufficient, and when used for meat-based food cans, the meat release property is poor.
- a double-sided laminated metal plate coated with different types of resin on the inner surface side and the outer surface side of the can is used.
- the film on the outer surface of the can is a relatively hard polyester resin film, and the film on the inner surface of the can has a lower melting point, meat release property, and It is preferable to use a relatively soft polyolefin resin film having excellent durability.
- a metal plate in which different kinds of films are laminated on both sides is disclosed in JP-A-63-231926, JP-T-2-501644 and JP-A-2002-120324.
- the term “high melting point” and “low melting point film” do not mean the absolute value of the melting point of both films, and the film with the relatively high melting point is called the “high melting point film” and the side with the relatively low melting point. This film is referred to as “low melting point film J”.
- a laminated metal plate is manufactured by laminating a heated metal plate and a resin film and bonding them by pressing with a laminating roll (thermal lamination method).
- the surface temperature of the film in contact with the metal plate must be at least its melting start point Tsm (usually a temperature about 0 to 30 ° C lower than the melting point), more preferably at least the melting point MP.
- Tsm melting start point
- MP melting point
- the temperature of the metal plate in the laminating part in relation to the film melting point.
- a polyester resin film is used as the high melting point film and the low melting point film is used.
- the melting point MP of both is large (for example, 265 ° C for polyethylene terephthalate (polyester type) and 168 ° C for polypropylene (polyolefin type)). Temperature, etc.), there is a problem that if the temperature of the metal plate is set according to one of the films, the other film cannot be bonded well.
- JP-A-63-231926 lamination of a resin film having a high melting point is performed first, and then lamination of a resin film having a low melting point is performed in a process after the temperature of the metal plate is lowered.
- a step lamination method and a method of laminating the resin by reheating after a lamination step by laminating roll bonding as shown in Japanese Patent Publication No. 2-501644 have been proposed.
- Japanese Patent Application Laid-Open No. 2002-120324 proposes a simultaneous lamination method in which the temperature of a metal plate is adjusted to that of a low-melting resin film. A low-melting resin for bonding is applied to the metal plate side of the high-melting resin film. It is considered necessary, and the cost is also high.
- the temperature of the metal plate is set to a low melting point so that the low melting point resin film does not fuse to the lamination mouth. Since the setting is made according to the film, the crystallinity of the laminated low melting point resin film cannot always be reduced to such an extent that it can be processed sufficiently. For this reason, when bending is performed to process a double-sided laminated metal plate into a food can, etc., the phenomenon of whitening of the low melting point film in the processed part appears, and it seems that there is foreign matter in the can. There was a risk of receiving a claim from users and can manufacturers. Disclosure of the invention
- the present invention solves the above-mentioned conventional problems, and provides a laminated metal plate that can be simultaneously laminated on both sides of a metal plate without winding two types of films having different melting points around the laminating roll. It is intended to provide a method of manufacturing the same. Further, the present invention provides a double-sided laminated metal plate which is less likely to cause whitening of a low melting point resin film even when processed for manufacturing a food can or the like, at a lower cost.
- the gist of the present invention is as follows.
- k A constant determined from the thermal conductivity, heat capacity, and temperature in the low-melting film, k ⁇ 2 [ ⁇ m ⁇ / (° C ⁇ s.)]
- the polyester resin is a poly (ethylene terephthalate), a poly (ethylene terephthalate / isophthalate) copolymer, a poly (ethylene terephthalate), a poly (ethylene terephthalate) naphthalate copolymer Mixed resin of polybutylene terephthalate and polyethylene terephthalate, mixed resin of polybutylene terephthalate and polyethylene terephthalate / isophthalate copolymer, or pigments
- the laminated metal plate according to (2) which is selected from a resin containing a dye.
- the above-mentioned resin is selected from polypropylene, polyethylene, polypropylene Z polyethylene random copolymer, or a resin containing a pigment or dye added thereto. 2) The laminated metal plate as described in the above.
- the high melting point film and the low melting point film when the melting point inside the film differs depending on the position in the thickness direction, the surface melting point on the side in contact with the edge of one film
- FIG. 1 is an enlarged sectional view of a double-sided laminated metal plate of the present invention.
- FIG. 2 is an explanatory diagram of a manufacturing process of a double-sided laminated metal plate.
- Fig. 3 is a temperature distribution diagram immediately before the mouth leaves the film when films having the same melting point are laminated on both sides of a metal plate.
- Figure 4 is a graph showing a heat transfer analysis model.
- FIG. 5 is a graph showing the temperature gradient in the two types of films.
- FIG. 6 is a graph showing a method for determining a thickness at which the film does not adhere to the mouth.
- FIG. 7 is a temperature distribution diagram at the laminating roll outlet in the present invention.
- FIG. 8 is an explanatory diagram of the 180-degree bending.
- FIG. 9 is a perspective view of the easy peel E0E. BEST MODE FOR CARRYING OUT THE INVENTION
- FIG. 1 is an enlarged cross-sectional view of a double-sided laminated metal plate of the present invention
- 3 is a metal plate such as a steel plate or an aluminum plate
- 1 is a high melting point film laminated on one side of this metal plate
- 2 Is a low-melting-point film laminated on the opposite side of the metal plate 3.
- FIG. 2 is an explanatory view of a manufacturing process of a double-sided laminated metal plate according to the present invention.
- reference numeral 10 denotes a pair of left and right laminating rolls, one having a high melting point and the other having a film 1 and a low melting point.
- the film 2 is superimposed on both sides of the metal plate 3, and is pressure-bonded by the laminating port 10.
- the metal plate 3 is, for example, a steel plate. When used as a material for a container, the thickness of the metal plate 3 is generally about 0.1 to 0.5 mm.
- the film 1 on the high melting point side is, for example, a polyester resin that is relatively hard and excellent in printability, scratch resistance, retort adhesion, etc.
- the film 2 on the low melting point side is, for example, corrosion resistance.
- It is a polyrefin-based resin with excellent processability, meet-releasing properties, and retort adhesion.
- A is a point immediately before the metal plate 3 comes into contact with the film, and B is a point immediately before the film separates from the laminator trolley 10.
- the metal plate 3 is previously heated to a temperature equal to or higher than the melting start point of the film 1 on the higher melting point side, preferably equal to or lower than the melting point + 50 ° C, for example, 270 ° C.
- the temperature of the contact surface of the film 1 and the film 2 with the metal plate 3 becomes equal to or higher than the melting start point, and the film 1 and the film 2 adhere to the metal plate 3.
- FIG. 3 schematically shows the temperature distribution in the metal plate and the film immediately before the roll separates from the film when a film having the same melting point is adhered to both surfaces of the metal plate 3 for explanation.
- the thickness of the film is determined because, for example, if the lower limit of the film formation is 10 ⁇ m, it is necessary to maintain the force and 20 ⁇ m or more to maintain the corrosion resistance.
- the condition for preventing the film from adhering to the roll is such that the temperature at the film thickness position C is always equal to or lower than the melting start point Tsml during the contact between the mouth and the film. This can be achieved by selecting the appropriate conditions.
- the thickness of the film on the high melting point side is generally about 20 to 30 ⁇ m in consideration of the corrosion resistance in cans. There are, however, other applications may be thicker.
- the temperature of the metal plate is usually higher than the melting start point Tsml of the film when it comes into contact with the film, but when the roll separates from the film, it is usually higher than the melting point Tsml of the film as shown in Fig. 3. Lower. This is because heat is extracted to the roll side through the film.
- This condition is a necessary condition of the roll entry temperature Ti for bonding a film with a high melting point to a metal plate when laminating two kinds of films having different melting points.
- ⁇ is determined by the heat removal conditions during lamination, and specifically by adjusting the surface temperature and rolling force of the laminating roll. ⁇ ⁇ 1 and can generally be adjusted to 0.75 ⁇ ⁇ ⁇ 1.
- Td ⁇ . Ti
- ⁇ ⁇ 1 — MP2
- MP 1 is the melting point (° C) of the high melting point film
- MP2 is the melting point (° C) of the low melting point film
- V is the passing speed (m / s).
- AT MP 1- ⁇ ⁇ Ti.
- Equation 2 k is a coefficient expressed by Equation 2 according to the law of heat transfer.
- a one-dimensional heat transfer analysis model of the inside of the film is created with the horizontal axis X being the film thickness and the vertical axis being the temperature T.
- the time required for the films 1 and 2 to pass between the laminating ports 10 and 10 is as short as several tens of msec, and unsteady heat transfer occurs.
- accurate analysis of actual heat transfer phenomena is extremely difficult.
- the contact state between the metal plate and the film and the contact state between the film and the mouth changes due to the pressing force of the roll, the surface state of the film, and the like, whereby the surface temperature of the film also changes, so that the temperature gradient also changes. Therefore, when the range of the value of k was obtained operationally based on the law of heat transfer, it was found that the value was in the range of k ⁇ 2. The larger the value of k, the greater the effect of suppressing film wrapping, but about 5 is sufficient for practical use.
- the film thickness d2 can be reduced by increasing the passing speed V.
- the passing speed V is required to achieve the film passing property and uniform heating of the metal plate. It is not preferable to increase the pressure too much, and usually the operation is performed at about 2.5 to 3.5 m / s. However, it goes without saying that the value may exceed 3.5 m / s depending on the equipment.
- the metal plate various metals such as an aluminum plate, a mild steel plate, various plating steel plates, and a stainless steel plate generally used as a container material can be used.
- the resin constituting the high melting point film 1 can be applied in principle as long as it is a thermoplastic resin, such as poly (ethylene terephthalate), poly (ethylene terephthalate) / isophthalate copolymer, poly (ethylene naphthalate), and the like.
- a thermoplastic resin such as poly (ethylene terephthalate), poly (ethylene terephthalate) / isophthalate copolymer, poly (ethylene naphthalate), and the like.
- resins selected from mixed resins or resins containing pigments or dyes are often used.
- a biaxially stretched film is used to increase the strength and hardness.
- a chromium oxide film is applied to the metal plate surface for the purpose of improving adhesion, and the resin has a polarity on the steel plate bonding surface. It is also possible to use those in which an adhesive layer is provided in combination.
- the resin constituting the low melting point film 2 is also a thermoplastic resin
- Applicable in principle, and often used are selected from polypropylene, polyethylene, random copolymers of polypropylene / polyethylene, or resins containing pigments or dyes.
- These polyolefin-based resins have a lower melting point than the polyester-based resin constituting the high-melting point film 1.
- the melting point of the polyethylene terephthalate resin used as the high-melting point film 1 is 265 ° C.
- the melting point of the polypropylene resin used as the low melting point film 2 is 168 ° C.
- the double-sided laminating metal plate of the present invention can be obtained by adjusting the temperature condition of the metal plate 3 to the high melting point film 1 by adjusting the temperature of the low melting point film 2 to be relatively large. It was simultaneously laminated. As a result, the laminated low-melting point film 2 is heated to a considerably higher temperature than the conventional double-sided laminated metal plate, and has an amorphous quality.
- the double-sided laminated metal sheet of the present invention is hardly whitened even when bending or the like is performed for processing into a container or the like.
- a plate 4 having a thickness of 1 mm is sandwiched between the high-melting-point films 1 by 180 ° bending, and a low point before and after the bending is applied.
- the degree of whitening of Film 2 was defined by the haze value. That is, the bending is performed by 180 ° so that the low melting point film 2 is on the outside.
- the haze value is a value defined as diffuse transmittance / total light transmittance X 100 (%), which is obtained by optically measuring the haze value of a film.
- the measurement method is specified in JIS-K7136. I have. Here, before and after bending, the double-sided laminated metal plate is immersed in 18% HC1 at 40 ° C to dissolve the metal plate 3 and peel off the low-melting-point film 2 for removal. Take a 50mm x 50mm haze measurement sample with the bend at the center. And measured three times to obtain the average value. The measurement is performed around the bent part.
- the double-sided laminated metal sheet of the present invention has a difference ⁇ of the haze value of the low melting point film 2 before and after the bending process of 20% or less, and is suitable for the simultaneous lamination method with low production cost. It can be manufactured more.
- the temperature condition of the metal plate 3 can be set according to the characteristics of the high melting point film 1, a biaxially stretched polyester resin film is used as the high melting point film, and the crystal orientation of the surface layer remains. Can be laminated.
- the high melting point film 1 is usually set to the outside and the low melting point film 2 is set to the inside.
- the double-sided laminated metal plate of the present invention is used as the inner lid 5 of the can, such as Easy Peel ⁇ 0 ⁇ (easy open end) shown in FIG. 9, polypropylene is laminated on the lower surface.
- the low melting point film 2 may be used as the upper side (outer side of the can). Thus, which side should be the outside of the container may be appropriately determined according to the intended use.
- Table 1 Various films 1 (melting point MP1, thickness dl) and various films 2 (melting point MP2, thickness d2) shown in Table 1 were applied to both sides of the chrome-coated steel sheet under the laminating conditions shown in Table 1. Laminated. In each of the invention examples 1 to 8, the thickness d2 of the film 2 is larger than the calculated d2 value calculated from the laminating condition.
- Table 2 shows the evaluation of the winding of the film 2 around the mouth and the adhesion of the film 1 to the steel sheet in each of the invention examples. Tables 1 and 2 also show examples out of the conditions of the present invention as Comparative Examples 1 to 5.
- the PP in Table 1 is a polypropylene film, but pure PP is non-polar and cannot be sufficiently bonded by heat lamination. A modified PP adhesive layer having a polarity of ⁇ m (melting point: 166 ° C.) was used. In addition, since the polyethylene film shown as PE is pure and non-polar and cannot be sufficiently adhered by thermal lamination, a 10 ⁇ m-thick ethylene acrylic acid copolymer resin adhesive layer ( Melting point 99 ° C) was used.
- Invention Example 1 good adhesion without film peeling was obtained even when retorting at 125 ° C. for 30 minutes in steam.
- the thickness of Film 2 was set to 25 m smaller than 25.5 ⁇ m, which is the calculated value of d2, while keeping the other conditions the same as those of Invention Example 1. Winding around the roll occurred.
- Invention Example 2 increased the threading speed of Comparative Example 1 to 2.9 m / s while keeping the other conditions the same.
- the calculated value of d 2 is 22 m
- the thickness of film 2 is 25 ⁇ . It was as follows. As a result, it was possible to avoid winding around the laminating roll.
- Comparative Example 3 was an example in which ⁇ was raised to 226 ° C. which was equal to the melting point MP 1 of Film 1, and Film 2 was wound around a laminator roll.
- Inventive Example 3 is an example in which the type of Film 2 was changed from Inventive Example 1 to PE, and a laminating metal plate could be manufactured without causing winding around a laminate roll.
- the thickness of Film 2 was set to 60 ⁇ , which is thinner than 70.4 ⁇ , which is the calculated value of d 2, under the same conditions as Inventive Example 3, so that Film 2 was wound around a laminator roll. Tightness occurred.
- the thickness of the film 2 was set to 40 m, which was smaller than the calculated value of d 2, and the film 2 was wound around the laminator trolley. Therefore, in Invention Example 4, the thickness of the film 2 was set to 70 ⁇ while keeping the other conditions the same as in Comparative Example 5. As a result, winding around the laminator roll was eliminated, and even when the obtained laminating metal plate was subjected to retort sterilization treatment, film 1 did not peel off.
- Invention Example 5 is an example in which the thickness of the film 2 was made to match the calculated value of d2. This is an example where the thickness of the low melting point film is close to the upper limit.
- Inventive Example 6 is an example in which lamination was performed without any trouble even when the passing speed was set to the lower limit of 1 mZs.
- Invention Example 7 is an example in which lamination could be performed without any trouble even if the threading speed was set to the upper limit of 3.5 m / s on the equipment.
- Invention Example 8 is an example in which a two-layer PET film was used as Film 1. This two-layer PET film has a thickness of 7 ⁇ m on the outside and a melting point of 265 It consists of PET at ° C, PET-IA (: * 5) with a thickness of 6 tm and a melting point of 226 CC.
- Ia / Ib is the ratio of the following two peaks obtained by X-ray diffraction measurement using CuK ray on the coated side of the high-melting point film (polyester film) of a double-sided laminated metal plate.
- I a is the X-ray diffraction intensity of the (100) plane (plane spacing about 0.34 nm) parallel to the polyester film surface
- lb is the X-ray diffraction plane of the (110) plane (plane spacing of about 0.39 nm).
- Ia / Ib is in the range of 0.7 to 10, indicating that the crystal orientation does not completely melt to the surface layer and remains.
- ⁇ 2 Corrosion resistance after processing is obtained by punching a double-sided laminated metal plate into a disk shape with a diameter of 158mm and drawing with a drawing ratio of 1.56 to obtain a shallow drawn cup so that the low melting point film is on the inner surface. Then, redrawing was performed at a drawing ratio of 1.23, and a can (DRD can) with a cup diameter of 82 mm and a cup height of 52 mm was filled with 2% citric acid and stored at 37 ° C for 6 months. This is the result of observing the corrosion state of the inner surface of the can.
- PET-PBT is a mixed resin of polyethylene terephthalate and polybutylene terephthalate.
- the two-layer PET is a two-layer PET film with a surface layer of 10 ⁇ PET (MP 265 ° C) and a lower layer of 10 ⁇ m PET-IA (MP about 150 ° C).
- PET-IA is a polyethylene terephthalate Z isophthalate copolymer. 6: PET is polyethylene terephthalate. * 7: PP is polypropylene.
- PE is polyethylene
- Table 3 shows examples of the present invention. Two types of films of the materials shown in the table were simultaneously laminated on both sides of a steel plate. MP1 is the melting point of the high melting point film, d1 is its thickness, ⁇ 2 is the melting point of the low melting point film, and d2 is its thickness.
- the sheet temperature Ti is the temperature of the metal sheet during lamination, and the speed V is the passing speed during lamination.
- Hz1 and Hz2 were measured according to JIS-K7136 by the method described above.
- Table 4 shows a comparative example.
- ⁇ in the formability column indicates that no damage to the film was observed when the processing described below * 2 was applied, and X indicates that cracks associated with whitening were observed.
- ⁇ indicates no whitening
- ⁇ indicates slight whitening without actual harm
- X indicates obvious whitening.
- IaZIb is the ratio of the following two peaks obtained by X-ray diffraction measurement using CuKo; line on the high melting point film (polyester film) of a double-sided laminated metal plate. Is the X-ray diffraction intensity of the (100) plane (about 0.34 nm) parallel to the polyester film surface, and lb is the X-ray diffraction of the (110) plane (about 0.339 ⁇ ) of the same plane. Strength. In the example, Ia / Ib is in the range of 0.7 to 10, indicating that the crystal orientation does not completely melt to the surface layer and remains.
- Corrosion resistance after processing is obtained by punching a double-sided laminated metal plate into a disk with a diameter of 158mm, drawing at a drawing ratio of 1.56 so that the low-melting-point film is on the inner surface, and obtaining a shallow drawing cup. Performed re-drawing at 1.23 to make a can (82 mm cup diameter, 52 mm cup height) (DRD can), filled with 2% citric acid, stored at 37 ° C for 6 months and corroded inside the can It is the result of observing the state.
- PET-PBT is a mixed resin of polyethylene terephthalate and polybutylene terephthalate.
- Two-layer PET is a two-layer PET film with a surface layer of ⁇ (MP 265 ° C) and a lower layer of 10 ⁇ m PET-IA (MP about 150 ° C).
- PET-IA is a polyethylene terephthalate / isophthalate copolymer.
- PET is polyethylene terephthalate.
- A PP is polypropylene.
- PE is polyethylene
- the double-sided laminated metal sheet of the present invention in which the difference ⁇ in the haze value of the low-melting point film before and after bending is set to 20% or less, is excellent in formability and corrosion resistance after processing.
- the difference ⁇ in the haze value of the low-melting point film before and after bending is set to 20% or less.
- the difference in the haze value before and after the bending was more than 20%, whitening was observed when processed into a container, indicating that the moldability and the corrosion resistance after the processing were poor.
- the laminated metal plate according to the present invention can simultaneously lay two types of films having different melting points on both sides of the metal plate by adjusting the thickness of the film having the lower melting point, without winding the two films having different melting points around a laminating roll. Can be mined.
- the low melting point resin film does not whiten and does not have the appearance of foreign matter in the can. Furthermore, if a biaxially stretched polyester resin film is used for the high melting point film and the crystal orientation of the surface layer is left, the high melting point film can have sufficient hardness and strength, and the film thickness can be reduced. It can be made thinner to further reduce costs.
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- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Laminated Bodies (AREA)
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/568,652 US20060210814A1 (en) | 2003-08-18 | 2003-11-21 | Laminated metal sheet and process for producing the same |
DE60331007T DE60331007D1 (de) | 2003-08-18 | 2003-11-21 | Laminiertes blech und herstellungsverfahren dafür |
AU2003284642A AU2003284642A1 (en) | 2003-08-18 | 2003-11-21 | Laminated metal sheet and process for producing the same |
EP03774158.4A EP1658955B2 (en) | 2003-08-18 | 2003-11-21 | Laminated metal sheet |
US12/317,201 US8551281B2 (en) | 2003-08-18 | 2008-12-18 | Laminated metal sheet and method of production of same |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003-207664 | 2003-08-18 | ||
JP2003207664A JP4537673B2 (ja) | 2002-10-17 | 2003-08-18 | ラミネート金属板の製造方法 |
JP2003-343969 | 2003-10-02 | ||
JP2003343969A JP4183126B2 (ja) | 2003-10-02 | 2003-10-02 | 缶容器用両面ラミネート金属板 |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10568652 A-371-Of-International | 2003-11-21 | ||
US12/317,201 Continuation US8551281B2 (en) | 2003-08-18 | 2008-12-18 | Laminated metal sheet and method of production of same |
Publications (1)
Publication Number | Publication Date |
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WO2005016631A1 true WO2005016631A1 (ja) | 2005-02-24 |
Family
ID=34197123
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2003/014945 WO2005016631A1 (ja) | 2003-08-18 | 2003-11-21 | ラミネート金属板とその製造方法 |
Country Status (5)
Country | Link |
---|---|
US (2) | US20060210814A1 (ja) |
EP (1) | EP1658955B2 (ja) |
AU (1) | AU2003284642A1 (ja) |
DE (1) | DE60331007D1 (ja) |
WO (1) | WO2005016631A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005015340A1 (de) * | 2005-04-01 | 2006-10-05 | Jowat Ag | Verfahren zur Kaschierung flächiger Trägermaterialen auf Substraten |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008198917A (ja) * | 2007-02-15 | 2008-08-28 | Polymatech Co Ltd | 熱拡散シート及びその製造方法 |
US20120240756A1 (en) * | 2010-12-21 | 2012-09-27 | E. I. Du Pont De Nemours And Company | Trauma Reducing Pack |
EP3339020A1 (de) * | 2016-12-22 | 2018-06-27 | Numan Sener | Komposit-folie als verpackungsmaterial für lebensmittel |
US10303822B2 (en) * | 2017-03-30 | 2019-05-28 | Livermore Software Technology Corp. | Systems and methods of designing geometry of tool set in a numerical simulation of sheet metal forming operations including springback compensation |
WO2019112051A1 (ja) * | 2017-12-07 | 2019-06-13 | 日本製鉄株式会社 | ヒートシール蓋及び缶 |
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GB8724244D0 (en) † | 1987-10-15 | 1987-11-18 | Metal Box Plc | Producing laminated materials |
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EP0899089B1 (en) * | 1996-05-14 | 2005-01-19 | TOYO KOHAN Co., Ltd | Method and apparatus for manufacturing metallic sheet covered with thermoplastic resin |
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2003
- 2003-11-21 DE DE60331007T patent/DE60331007D1/de not_active Expired - Lifetime
- 2003-11-21 EP EP03774158.4A patent/EP1658955B2/en not_active Expired - Lifetime
- 2003-11-21 US US10/568,652 patent/US20060210814A1/en not_active Abandoned
- 2003-11-21 AU AU2003284642A patent/AU2003284642A1/en not_active Abandoned
- 2003-11-21 WO PCT/JP2003/014945 patent/WO2005016631A1/ja active Application Filing
-
2008
- 2008-12-18 US US12/317,201 patent/US8551281B2/en active Active
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JPS63231926A (ja) * | 1987-03-20 | 1988-09-28 | Nippon Steel Corp | 缶材用積層鋼板の製造方法 |
WO1989003302A1 (en) * | 1987-10-15 | 1989-04-20 | Mb Group Plc | Laminated metal sheet |
US5234516A (en) * | 1992-01-28 | 1993-08-10 | Toyo Kohan Co., Ltd. | Method for production of a polyethylene laminated metal sheet |
JPH05200961A (ja) * | 1992-01-28 | 1993-08-10 | Toyo Kohan Co Ltd | 耐熱水性に優れたポリエチレン樹脂被覆金属板の製造 方法 |
WO1994021457A1 (en) * | 1993-03-25 | 1994-09-29 | Carnaudmetalbox Plc | Process and apparatus for producing laminated materials |
EP0796721A1 (en) * | 1994-12-09 | 1997-09-24 | TOYO KOHAN Co., Ltd | Method and apparatus for producing laminate board |
EP1086808A2 (en) * | 1999-09-22 | 2001-03-28 | Nkk Corporation | Resin film laminated metal sheet for can and method for fabricating the same |
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DE102005015340A1 (de) * | 2005-04-01 | 2006-10-05 | Jowat Ag | Verfahren zur Kaschierung flächiger Trägermaterialen auf Substraten |
DE102005015340B4 (de) * | 2005-04-01 | 2011-11-17 | Jowat Ag | Verfahren zur Herstellung von mit einer Bedruckung oder einem Dekorversehenen Formkörpern und auf diese Weise hergestellte Formkörper |
Also Published As
Publication number | Publication date |
---|---|
EP1658955B1 (en) | 2010-01-13 |
EP1658955A1 (en) | 2006-05-24 |
AU2003284642A1 (en) | 2005-03-07 |
DE60331007D1 (de) | 2010-03-04 |
EP1658955A4 (en) | 2007-08-08 |
US8551281B2 (en) | 2013-10-08 |
US20060210814A1 (en) | 2006-09-21 |
EP1658955B2 (en) | 2014-10-22 |
US20090133830A1 (en) | 2009-05-28 |
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