JP4580535B2 - Method and apparatus for laminating resin coating - Google Patents

Description

[0001]
[Field of the Invention]
The present invention provides a resin coating that retains the ears that are generated when a resin film is formed by extruding and laminating a resin on the surface of a substrate to form the resin film, or that discharges the trimmed trimmed parts at the time of lamination. The present invention relates to a laminating method and apparatus.
[0002]
Conventionally, for example, in the production of a laminate having a resin film formed on the surface of a metal plate, both end portions of the resin film that has become thick due to the neck-in phenomenon are formed as ears on both sides of the laminate plate, and then together with the metal plate Trimming or laminating of the resin film is performed so as not to cause the ears.
[0003]
[Problems to be solved by the invention]
However, in the former case, there is a problem that if the ears are strongly sandwiched with a coater roll or the like, they will adhere to them and cannot be discharged stably in the direction of discharging the ears, whereas the latter case Since the thick resin coating cannot be used, there is a problem that it is cut together with a metal plate to become scrap.
In both cases, since the trimmed resin film is integrated with the metal plate, the trimmed resin film cannot be recycled.
Furthermore, in the former case, it is conceivable that trimming is performed immediately after laminating because the ear part is likely to fall off or adhere to the base material during the path leading to the trimming process. Ears are easier to wrap around the coater roll.
Then, this invention makes it a subject to provide the lamination method and apparatus of the resin film which prevent reliably the winding of the ear | edge part of the resin film which generate | occur | produces at the time of trimming to the coater roll.
[0004]
[Means for Solving the Problems]
The method for laminating the resin coating of the present invention is as follows:
A pair of coater belts are wound around a belt mounting portion and a belt mounting roll at both ends of the coater roll, and at least one surface of the base material is coated with a molten resin having an ear portion passing between the coater rolls, and then the above resin coating The ears are trimmed, and the separated ears are guided and discharged by a pair of left and right coater belts facing each other.
In such a method of laminating the resin coating, it is desirable that the pair of right and left coater belts facing each other guide the ear without pressing the ear of the resin coating at the same time.
Thereby, it can discharge reliably, without an ear | edge part adhering to a coater belt, or winding.
Further, in such a method for laminating a resin coating, it is desirable that the ear portion of the resin coating is discharged while being inclined with respect to the substrate.
Accordingly, the ear can be reliably discharged to the outside without being wound around the coater belt.
The apparatus for laminating a resin film of the present invention includes a T die for supplying a molten resin between a base material and a coater roll, and a coater roll on both surfaces of the base material, and a belt mounting roll provided below the coater roll, The coater belt is wound between both ends of the coater roll and the belt mounting roll.
In such a resin film laminating apparatus, it is desirable that the relationship between the thickness U of the resin film ear and the gap S between the coater belts facing each other is 2U <S.
With this configuration, the ear portion can be reliably discharged without adhering to or wrapping around the coater belt or reattaching to the laminate plate.
In such a resin film laminating apparatus, it is desirable that the relationship between the base plate passing speed V1 and the coater belt peripheral speed V2 is such that the base plate passing speed V1> the coater belt peripheral speed V2 .
With this configuration, it is possible to apply a pulling force of the ear part.
In addition, such a resin coating laminating apparatus is preferably arranged in a state where the coater belt is inclined by θ1 (coater belt inclination angle) with respect to the sheet passing direction of the metal plate .
With this configuration, the ear portion can be smoothly and reliably discharged to the outside without being wound around the coater roll or reattaching to the laminate plate.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be specifically described below with reference to the drawings.
FIG. 1 is a schematic perspective view of a resin film laminating apparatus according to a first embodiment of the present invention. FIG. 2 is a schematic side view of the apparatus. FIG. 3 is a schematic explanatory diagram in which a main part on the right side of the center line of the apparatus is enlarged. FIG. 4 is a schematic side view of a resin film laminating apparatus according to the second embodiment of the present invention. FIG. 5 is a schematic side view of a resin film trimming apparatus according to a modification of another embodiment of the present invention.
[First Embodiment]
A first embodiment of the present invention will be described with reference to FIGS. First, the resin is applied to both surfaces of the metal plate 10 by passing the metal plate 10 between a pair of coater rolls 11 while extruding the molten resin R from the T die 15 toward both surfaces of the metal plate 10 to be passed. The coating 16 is laminated.
After that, the ears 17 formed on both side edges of the resin coating 16 are guided by a pair of oppositely driven coat belts 19 to discharge the ears 17 to the outside.
[0006]
At this time, as shown in FIG. 3, the relationship between the ear portion 17 of the resin coating 16 and the thickness U of the ear portion 17 of the resin coating 16 and the gap S between the pair of left and right coater belts 19 facing each other is 2U. <S, and the ear 17 is guided in a state where it is not strongly pressed on both sides of the coater belt 19 facing each other.
That is, the ear portion 17 is not in contact with both surfaces of the coater belt 19 facing each other, or is in contact with either one of the coater belts 19 but is strongly pinched (pressed) by the coater belt 19. It is preferable to guide in the absence state in order to avoid adhesion and winding of the ear portion 17 to the coater belt 19.
[0007]
In this embodiment, as shown in FIGS. 1 and 2, a pair of long coater rolls 11 are provided on both surface sides of a metal plate 10 that is an example of a substrate that is passed in the vertical direction. 10 are arranged in a state of being sandwiched.
As shown in FIG. 3, the coater roll 11 has a cylindrical elastic body 14 mounted on the surface of a long roll body 12, leaving a belt mounting portion 13 that forms both ends.
The metal plate 10 is sandwiched between the pair of coater rolls 11 via the elastic body 14 in a state where the metal plate 10 is elastically pressed.
[0008]
On the other hand, as shown in FIGS. 1 and 2, a pair of T dies 15 capable of extruding the molten resin R are disposed above the pair of coater rolls 11.
Then, the molten resin R is extruded from these T dies 15 to the nip portions formed between the corresponding surfaces of the coater roll 11 and the metal plate 10, and then the molten resin R is applied to the metal plate 10 by the pair of coater rolls 11. By pressure bonding, the resin coating 16 is formed on both surfaces of the metal plate 10 to manufacture the laminate plate 10A.
At this time, by setting the width of the T die 15 so that the film width of the molten resin R from the T die 15 is wider than the width of the metal plate 10, the ear portion 17 of the resin coating 16 becomes as shown in FIG. As shown in FIG. 3, the elastic body 14 is positioned on the coater belt 19 attached to the belt attaching portion 13 provided at both ends.
[0009]
Moreover, as shown in FIGS. 1 and 2, a pair of metal plates 10, which are examples of a substrate that is passed in the vertical direction, at a predetermined distance below the pair of long coater rolls 11. The belt mounting roll 18 is disposed so as not to contact both surfaces of the metal plate 10.
Although not shown, the pair of belt mounting rolls 18 in the substrate width (K) direction may be in the form of one long roll like the coater roll 11.
[0010]
Further, as shown in FIGS. 1 and 3, the pair of coater belts 19 are respectively attached to the belt mounting portion 13 and the belt mounting at both ends of the coater roll 11 so as to form a step in contact with the end surface of the elastic body 14. It is wound around a roll 18.
Each coater belt 19 is disposed along both side edges of the metal plate 10, and the ear 17 of the trimmed resin coating 16 is removed from the coater roll by removing the coat 17 with the ear 17 in contact with the coater belt 19. 11 can be discharged without being wound around.
[0011]
Trimming of the ear 17 of the resin coating 16 is performed by applying a relationship between the width of the metal plate 10 (that is, the base material width K) and the width (L) of the elastic body 14 such that the base material width K <elastic body width L. It is preferable that the ear portion 17 is trimmed by shearing at the nip pressure P of the elastic body 14 and the edge portion of the metal plate 10.
[0012]
Further, when supporting or trimming the ear 17 of the resin coating 16 described above, the relationship between the peripheral speed V1 of the coater roll 11 and the peripheral speed V2 of the coater belt 19 is not equal, or is guided by the coater belt 19. The ear 17 can be supported and trimmed more reliably by applying a separating force without setting the relationship with the speed V3 of the ear 17 to be equal.
[0013]
[Second Embodiment]
Next, a second embodiment of the present invention will be described based on FIG. In the present embodiment, the pair of coater belts 19 in the first embodiment described above are inclined by a predetermined angle θ1 (coater belt inclination angle) with respect to the sheet passing direction of the metal plate 10, and the inclined coater belt 19 is provided. The ear portion 17 of the resin film 16 trimmed in between is supported and discharged to the outside.
[0014]
In the present embodiment, by inclining the coater belt 19, the support and discharge of the ear portion 17 of the resin coating 16 is started almost simultaneously with trimming, and the ear portion 17 is separated from the plate passing direction of the metal plate 10. Since the ear portion 17 is guided in the direction, the ear portion 17 can be smoothly and reliably discharged to the outside without being wound around the coater roll 11 and reattaching to the laminate plate 10A.
[0015]
The resin film laminating method and apparatus according to the present invention have been described above with reference to the first and second embodiments. However, the present invention is not limited to these embodiments, and other Embodiments and modifications are possible.
For example, as shown in FIG. 5, a T-die 15 is provided so as to laminate a resin only on one side of a metal plate 10 as a base material, and trimming is also performed when a resin film is formed on one side of the metal plate 10. Needless to say, it can be applied.
[0016]
Although not shown, the state shown in FIGS. 1 and 2, that is, below the coater belt 19 that does not provide the inclination of θ 1, is inclined by a predetermined angle θ 1 with respect to the plate direction of the metal plate 10 shown in FIG. A coater belt 19 may be disposed.
In the present invention, the base material is described as a metal plate and the coating as a resin, but instead of these, even a combination of covering a long-rolled sheet shape such as a metal foil, paper, a resin film, etc. Technical ideas are applicable.
[0017]
The materials preferably used in the present invention will be described below.
〔Base material]
In the present invention, it is desirable to use a metal material as the base material, but various surface-treated steel plates, light metal plates, metal foils and the like can be used as the metal material.
[0018]
As the surface-treated steel sheet, a cold-rolled steel sheet obtained by performing one kind or two or more kinds of surface treatments such as zinc plating, tin plating, nickel plating, electrolytic chromic acid treatment, and chromic acid treatment can be used. An example of a suitable surface-treated steel sheet is an electrolytic chromic acid-treated steel sheet, particularly comprising a 10-200 mg / m ² metallic chromium layer and a 1-50 mg / m ² chromium hydrated oxide layer in terms of metallic chromium. The combination of coating film adhesion and corrosion resistance is excellent. Another example of the surface-treated steel plate is a tin plate having a tin plating amount of 0.6 to 11.2 g / m ² . It is desirable that the tin plate is subjected to chromic acid treatment or chromic acid / phosphoric acid treatment so that the amount of chromium is 1 to 30 mg / m ^{2 in} terms of metallic chromium. Further, an aluminum-coated steel sheet subjected to aluminum plating, aluminum pressure welding, or the like can also be used.
[0019]
As the metal plate, a light metal plate of an aluminum alloy plate in addition to a pure aluminum plate is used. The aluminum alloy plate excellent in terms of corrosion resistance and workability is Mn: 0.2 to 1.5% by weight, Mg: 0.8 to 5% by weight, Zn: 0.25 to 0.3% by weight , And Cu: 0.16 to 0.26% by weight, with the balance being Al.
These metal plates are also preferably subjected to chromic acid treatment or chromic acid / phosphoric acid treatment so that the chromium amount is 20 to 300 mg / m ^{2 in} terms of metallic chromium.
[0020]
In general, the thickness of the metal plate is preferably 0.10 to 0.50 mm. Among these, in the case of a surface-treated steel plate, the thickness is 0.10 to 0.30 mm, and in the case of a light metal plate, it is 0. Those having a thickness of .15 to 0.40 mm are preferable. Of course, it is necessary to take into consideration that the difference depends on the type of metal and the use and size of the laminate material.
[0021]
An adhesive primer layer can also be formed on the metal material. The primer needs to exhibit excellent adhesion to both the metal material and the thermoplastic resin. An example of the primer coating is a phenol epoxy coating composed of a resol type phenol aldehyde resin derived from various phenols and formaldehyde, and a bisphenol type epoxy resin. A paint containing 5:95 weight ratio, particularly 40:60 to 10:90 weight ratio, can be preferably applied. The thickness of the adhesive primer layer is preferably about 0.3 to 5 μm from the viewpoint of adhesion and the like.
[0022]
[resin]
Although it is desirable to use a thermoplastic resin as the resin to be coated on the substrate, any thermoplastic resin may be used as long as it can be extruded and has film-forming properties. For example, low-density polyethylene, high-density polyethylene, polypropylene, poly 1-butene, poly 4-methyl-1-pentene, or random α-olefins such as ethylene, pyropyrene, 1-butene, 4-methyl-1-pentene, etc. Polyolefins such as block copolymers, ethylene / vinyl acetate copolymers, ethylene / vinyl alcohol copolymers, ethylene / vinyl compound copolymers such as ethylene / vinyl chloride copolymers, polystyrene, acrylonitrile / styrene copolymers, ABS, styrene resin such as α-methylstyrene / styrene copolymer, polyvinyl chloride, polyvinylidene chloride, vinyl chloride / vinylidene chloride copolymer, polyvinyl compound such as polymethyl acrylate and polymethyl methacrylate, nylon 6 , Nylon 6-6, nylon Any of resins such as polyamides such as 6-10, nylon 11 and nylon 12, thermoplastic polyesters such as polyethylene terephthalate and polybutylene terephthalate, polycarbonate, polyphenylene oxide and the like or mixtures thereof can be applied.
[0023]
Examples of a particularly suitable thermoplastic resin from the viewpoint of film properties, processability, corrosion resistance, and the like include thermoplastic polyesters or copolymerized polyesters, blends thereof, and laminates thereof. Of these, polyesters mainly composed of ethylene terephthalate units are preferred.
Polyethylene terephthalate can be used as the raw material polyester, but lowering the maximum crystallinity is desirable from the viewpoint of impact resistance and workability of the laminate. Therefore, copolymer polyester units other than ethylene terephthalate are included in the polyester. It is also preferable to introduce.
[0024]
It is particularly preferable to use a copolyester having a melting point of 210 to 252 ° C. mainly composed of ethylene terephthalate units and containing a small amount of other ester units. The melting point of homopolyethylene terephthalate is generally 255 to 265 ° C.
[0025]
Generally, 70 mol% or more, particularly 75 mol% or more of the dibasic acid component in the copolyester is composed of a terephthalic acid component, and 70 mol% or more, particularly 75 mol% or more of the diol component is composed of ethylene glycol. It is preferable that 1 to 30 mol%, particularly 5 to 25%, of the acid component and / or diol component is composed of a dibasic acid component other than terephthalic acid and / or a diol component other than ethylene glycol.
[0026]
Dibasic acids other than terephthalic acid include aromatic dicarboxylic acids such as isophthalic acid, phthalic acid and naphthalenedicarboxylic acid: alicyclic dicarboxylic acids such as cyclohexanedicarboxylic acid: succinic acid, adipic acid, sebacic acid, dodecanedione Examples of the diol component other than ethylene glycol include propylene glycol, 1,4-butanediol, diethylene glycol, 1,6-hexylene glycol, and the like. 1 type, or 2 or more types, such as cyclohexane dimethanol and the ethylene oxide adduct of bisphenol A, are mentioned.
The combination of these comonomers must be such that the melting point of the copolyester is within the above range. In addition, multifunctional monomers such as trimellitic acid, pyromellitic acid, and pentaerythritol can be used in combination.
[0027]
The polyester used should have a molecular weight sufficient to form a film, for which purpose an intrinsic viscosity (IV) of 0.55 to 1.9 dl / g, in particular 0.65 to 1.4 dl / g. Those in the range of are desirable.
[0028]
The thermoplastic resin coating layer may contain an inorganic filler (pigment) for the purpose of concealing the metal plate and assisting the transmission of the wrinkle-pressing force to the metal plate during drawing-redraw molding. Further, this film may be blended with known film compounding agents, for example, antiblocking agents such as amorphous silica, various antistatic agents, lubricants, antioxidants, ultraviolet absorbers, and the like according to known formulations. it can.
[0029]
Inorganic fillers include rutile-type or anatase-type inorganic white pigments such as titanium dioxide, zinc white and gloss white; barite, precipitated barium sulfate, calcium carbonate, gypsum, precipitated silica, aerosil, talc, calcined or unfired White extender pigments such as clay, barium carbonate, alumina white, synthetic or natural mica, synthetic calcium silicate, magnesium carbonate; black pigments such as carbon black and magnetite; red pigments such as Bengala; yellow pigments such as Siena; A blue pigment such as cobalt blue can be mentioned. These inorganic fillers can be blended in an amount of 10 to 500% by weight, particularly 10 to 300% by weight, based on the resin.
[0030]
【The invention's effect】
As described above, according to the present invention, it is possible to reliably prevent the rim of the resin film from being wound around the coater roll, which occurs during trimming, and to easily recycle the rim of the resin film.
[Brief description of the drawings]
FIG. 1 is a schematic perspective view of a resin film laminating apparatus according to a first embodiment of the present invention.
FIG. 2 is a schematic side view of the apparatus.
FIG. 3 is a schematic explanatory diagram showing an enlarged main part on the right side of the center line of the apparatus.
FIG. 4 is a schematic side view of a resin film laminating apparatus according to a second embodiment of the present invention.
FIG. 5 is a schematic side view of a resin film trimming apparatus according to a modification of another embodiment of the present invention.
[Explanation of symbols]
10 ... Metal plate (base material),
10A ... Laminated plate,
11 ... Coater roll,
12 ... Roll body 13 ... Belt mounting part,
15 ... T-die,
16 ... resin coating,
17 ... ears,
18 ... belt mounting roll 19 ... coater belt R ... molten resin,
θ1 ... Coater belt inclination angle

Claims (7)

A pair of coater belts are wound around the belt wearing part and the belt wearing roll at both ends of the coater roll,
At least one surface of the base material is coated with molten resin having ears through between coater rolls , and then the ears of the resin coating are trimmed, and the separated ears are guided and discharged by a pair of right and left coater belts facing each other. A method for laminating a resin film characterized by the above. The method for laminating a resin film according to claim 1, wherein the pair of right and left coater belts facing each other guide the ear part without simultaneously pressing the ear part of the resin film. The method for laminating a resin film according to claim 1 or 2, wherein the ear part of the resin film is discharged while being inclined with respect to the substrate. A T die for supplying a molten resin between a base material and a coater roll, and the coater roll are disposed on both sides of the base material, and a belt mounting roll is provided below the coater roll, and both ends of the coater roll and a belt A resin film laminating device in which a coater belt is wound between mounting rolls. The apparatus for laminating a resin film according to claim 4, wherein the relationship between the thickness U of the ear part of the resin film and the gap S between the coater belts facing each other is 2U <S. The resin film laminating apparatus according to claim 4 or 5, wherein the relationship between the base plate passing speed V1 and the coater belt peripheral speed V2 is the base plate pass speed V1> the coater belt peripheral speed V2 . The resin film laminating apparatus according to any one of claims 4 to 6, wherein the coater belt is disposed in a state where the coater belt is inclined by θ1 (coater belt inclination angle) with respect to a sheet passing direction of the metal plate .

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