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WO2010079723A1 - Procédé de production d'un film de résine fluorée traité en surface - Google Patents

Procédé de production d'un film de résine fluorée traité en surface Download PDF

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Publication number
WO2010079723A1
WO2010079723A1 PCT/JP2009/071798 JP2009071798W WO2010079723A1 WO 2010079723 A1 WO2010079723 A1 WO 2010079723A1 JP 2009071798 W JP2009071798 W JP 2009071798W WO 2010079723 A1 WO2010079723 A1 WO 2010079723A1
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WO
WIPO (PCT)
Prior art keywords
fluororesin
film
roll
fluororesin film
producing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2009/071798
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English (en)
Japanese (ja)
Inventor
裕正 湯川
樋口　義明
邦雄 増茂
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AGC Inc
Original Assignee
Asahi Glass Co Ltd
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Filing date
Publication date
Application filed by Asahi Glass Co Ltd filed Critical Asahi Glass Co Ltd
Publication of WO2010079723A1 publication Critical patent/WO2010079723A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/22—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length
    • B29C43/222—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length characterised by the shape of the surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/07—Flat, e.g. panels
    • B29C48/08—Flat, e.g. panels flexible, e.g. films
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/12—Articles with an irregular circumference when viewed in cross-section, e.g. window profiles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/13—Articles with a cross-section varying in the longitudinal direction, e.g. corrugated pipes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
    • B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
    • B29C2035/0811—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation using induction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/04—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/305—Extrusion nozzles or dies having a wide opening, e.g. for forming sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2027/00—Use of polyvinylhalogenides or derivatives thereof as moulding material
    • B29K2027/12—Use of polyvinylhalogenides or derivatives thereof as moulding material containing fluorine
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/25—Solid
    • B29K2105/253—Preform
    • B29K2105/256—Sheets, plates, blanks or films

Definitions

  • the present invention relates to a method for producing a fluororesin film having a plurality of convex portions and / or concave portions formed on the surface thereof, an agricultural house film obtained by the production method, and a skin material film for a solar cell panel.
  • the following methods are known.
  • a method of transferring to one side of a film see paragraphs [0013] and [0014] of Patent Document 1).
  • a method of injecting a thermosetting resin into a mold having concavo-convex shapes, heating and curing the prism sheet to obtain a prism sheet see paragraph [0031] of Patent Document 2.
  • thermoplastic fluororesin has been used as a material for agricultural house films, skin material films for solar battery panels, etc. because of excellent weather resistance.
  • the method (2) cannot be applied to thermoplastic fluororesins.
  • the fluororesin film with the unevenness formed on the surface is produced with high productivity and low cost for the following reasons. I can't.
  • the present invention provides a method capable of producing a fluororesin film having irregularities (prism shape, etc.) having an inclined surface with a predetermined inclination angle on the surface with good productivity and low cost;
  • a film for agricultural house and a skin material film for solar battery panel which are low cost, while being a fluororesin film having low properties.
  • the method for producing a fluororesin film of the present invention is extruded from a die between a mold roll having a plurality of convex portions and / or concave portions having an inclined surface with an inclination angle of 20 to 75 degrees and a backup roll.
  • the convex portion and / or the concave portion are transferred to the surface of the film at the same time as the fluororesin passed through is formed into a film.
  • the fluororesin is preferably an ethylene-tetrafluoroethylene copolymer.
  • the temperature of the die is preferably 280 to 360 ° C., and the temperature of the mold roll is preferably 120 to 240 ° C.
  • the outer peripheral speed of the mold roll is preferably 1 to 300 m / min.
  • the mold roll and the backup roll are preferably pressed at a linear pressure of 2 to 200 kg / cm.
  • the average interval between the local peaks of the convex portions or the average interval of the local valley bottoms adjacent to the concave portions is 4 to 200 ⁇ m, and the average height of the convex portions or the average depth of the concave portions is 2 It is preferable that the thickness is ⁇ 100 ⁇ m.
  • the convex portion is preferably a convex strip having a triangular cross section or a pyramidal projection.
  • the recess is preferably a groove having a V-shaped cross section or a pyramidal hole.
  • the said cross section means the cross section of the direction orthogonal to the longitudinal direction of a protruding item
  • the film for agricultural house and the skin material film for solar cell panel of the present invention are obtained by the method for producing a fluororesin film of the present invention.
  • a fluororesin film having irregularities (prism shape or the like) having an inclined surface with a predetermined inclination angle formed on the surface can be produced with high productivity.
  • the film for agricultural house and the skin material film for solar cell panel of the present invention are low cost compared with the conventional film, though it is a fluororesin film having a small incident angle dependency of light transmission amount.
  • the method for producing a fluororesin film of the present invention includes a mold roll having a plurality of convex portions and / or concave portions (hereinafter, collectively referred to as irregularities) having an inclined surface with an inclination angle of 20 to 75 degrees formed on the surface.
  • the fluororesin extruded from the die is passed between the backup roll and the fluororesin is formed into a film, and at the same time, the protrusions and / or recesses are transferred to the surface of the film.
  • FIG. 1 is a schematic view showing an example of a fluororesin film manufacturing apparatus.
  • the manufacturing apparatus 10 includes: an extruder 12 that melts a fluororesin; a die 14 that is connected to the extruder 12 and has a slit formed at the tip for extruding the melted fluororesin; and a fluororesin extruded from the die 14 A pair of mold rolls 16 and backup rolls 18 arranged so as to be able to pass through; the fluororesin film 20 moving along the mold rolls 16 is peeled off from the mold rolls 16 and simultaneously cooled, and a winder (not shown) And a peeling roll 22 to be transported to.
  • Mold roll examples of the material of the mold roll include metals, ceramics, resins, and the like. Since the heat processing temperature of the fluororesin is relatively high, a material having high heat resistance is preferable. The heat resistant temperature is preferably 300 ° C. or higher. Accordingly, the material of the mold roll is preferably a metal or ceramic from the viewpoint of heat resistance and durability, more preferably a metal from the viewpoint of workability, and further preferably an iron-based material.
  • the surface of the metal mold roll may be subjected to surface modification such as ceramic coating, ceramic sintering, ceramic vapor deposition, superhard metal spraying, plating, carburizing, and nitriding in order to increase the hardness.
  • surface modification when the mold roll is made of an iron-based material, electroless nickel plating is preferable from the viewpoint of surface roughness, corrosion resistance, and workability.
  • the thickness of the electroless nickel plating layer is preferably 50 to 500 ⁇ m. If the thickness of the plating layer is less than 50 ⁇ m, the base is exposed when the irregularities are formed, and the accuracy of the irregularities, the corrosion resistance, etc. are likely to deteriorate. When the thickness of the plating layer exceeds 500 ⁇ m, the strain of the plating layer becomes excessive, and the adhesion and corrosion resistance of the plating layer tend to be reduced due to the occurrence of defects such as cracks.
  • Examples of the method of forming irregularities on the surface of the mold roll include methods such as cutting and etching. From the viewpoint of productivity, a method of cutting while rotating the mold roll is preferable. For cutting, it is preferable to use a precision lathe because high accuracy is required.
  • the unevenness on the surface of the mold roll has a shape obtained by inverting the unevenness formed on the surface of the fluororesin film.
  • mold roll, etc. are mentioned.
  • the recess include a long groove extending on the surface of the mold roll, holes scattered on the surface of the mold roll, and the like.
  • Examples of the shape of the ridge or groove include a straight line, a curved line, a bent shape, and the like, and a linear shape extending in the circumferential direction of the mold roll is preferable.
  • a plurality of ridges or grooves may exist in parallel and have a stripe shape.
  • Examples of the cross-sectional shape of the ridges or grooves in the direction orthogonal to the longitudinal direction include triangles (V-shaped) and trapezoids, with triangles (V-shaped) being preferred.
  • Examples of the shape of the protrusion or hole include a triangular pyramid shape, a quadrangular pyramid shape, a hexagonal pyramid shape, and a conical shape.
  • the unevenness has an inclined surface with an inclination angle of 20 to 75 degrees in order to reduce the incident angle dependency of the light transmission amount in the fluororesin film.
  • the tilt angle is less than 20 degrees, the reduction in the dependency of the light transmission amount on the incident angle is small, and the light transmission amount cannot be sufficiently improved.
  • the inclination angle exceeds 75 degrees, the strength of the convex portions on the surface of the fluororesin film becomes insufficient, the mold release property after transferring the irregularities becomes poor, the production of the mold roll becomes difficult, Since the strength of the convex portions on the surface becomes insufficient, problems such as a decrease in durability of the mold roll occur.
  • the inclination angle of the inclined surface is preferably 30 to 65 degrees.
  • the inclination angle is the smallest angle ⁇ from the line to the inclined surface from the line connecting the local peaks of the mold rolls 16 that are adjacent to the convex portions (convex ridges 24).
  • the line connecting the local valley bottoms adjacent to the concave part is defined as 0 degree and the smallest angle ⁇ from the line to the inclined surface.
  • the total area of the inclined surfaces is preferably 50% or more, more preferably 70% or more, of the surface area (100%) of the mold roll.
  • the area of the surface of the mold roll is the area in the projected view showing the surface on one plane when viewed from the direction orthogonal to the surface of the mold roll, and the area of the surface of the mold roll before forming the irregularities. The same. Further, the area of the inclined surface is an area of the portion where the inclined surface is formed in the projection view, and is different from the actual area of the inclined surface in consideration of the inclination.
  • the unevenness is preferably in the form of a prism because the incident angle dependency of the light transmission amount can be sufficiently reduced.
  • the prism shape include a one-way triangular prism, a two-way prism, and a three-way prism.
  • a unidirectional triangular prism is easy to produce a mold roll and has good release properties, but optically anisotropic.
  • the two-way prism and the three-way prism have small optical anisotropy, but the cost of the mold roll is high.
  • the prism shape is selected depending on the performance required for the fluororesin film.
  • Examples of the unidirectional triangular prism include a protrusion having a triangular cross section and / or a groove having a V-shaped cross section. As shown in FIG. 2, the ridges and / or grooves preferably have a shape in which ridges 24 having a triangular cross section and grooves 26 having a V-shaped cross section are present alternately and in parallel.
  • Bidirectional prisms include quadrangular pyramidal protrusions and / or quadrangular pyramidal holes. It is more preferable that the protrusions and / or holes have a shape in which a plurality of protrusions and / or holes are arranged at equal intervals and the inclined surfaces of the adjacent protrusions and / or holes are positioned in the same plane.
  • Tridirectional prisms include triangular pyramidal protrusions and / or triangular pyramidal holes. It is more preferable that the protrusions and / or holes have a shape in which a plurality of protrusions and / or holes are arranged at equal intervals and the inclined surfaces of the adjacent protrusions and / or holes are positioned on the same plane.
  • the unevenness may be a conical protrusion and / or a conical hole from the viewpoint of reducing optical anisotropy. More preferably, the protrusions and / or holes have a shape in which a plurality of protrusions and / or holes are arranged at equal intervals.
  • the average interval between the irregularities is preferably 4 to 200 ⁇ m, and the average height of the convex portions or the average depth of the concave portions is preferably 2 to 100 ⁇ m. Since the thickness of the fluororesin film is preferably 300 ⁇ m or less in terms of weight and light transmittance, when the average interval exceeds 200 ⁇ m and the average height (average depth) exceeds 100 ⁇ m, the local valley bottom portion of the fluororesin film The thickness of the film becomes too thin and sufficient strength cannot be obtained.
  • the average interval between the irregularities is more preferably 5 to 100 ⁇ m, and the average height of the convex portions or the average depth of the concave portions is more preferably 4 to 50 ⁇ m. Further, the average interval between the irregularities is more preferably 10 to 60 ⁇ m, and the average height of the convex portions or the average depth of the concave portions is more preferably 8 to 30 ⁇ m.
  • the average interval is a value obtained by measuring 10 points at random between the intervals at the tops of the local peaks adjacent to the convex portions or the intervals at the local valley bottoms adjacent to the concave portions.
  • the average height (average depth) is a value obtained by randomly measuring 10 average height differences between the local peak of the convex part and the local valley bottom of the concave part that becomes the convex part.
  • Backup roll As the backup roll, an elastic roll is preferable from the viewpoint of making the pressing to the mold roll uniform.
  • the elastic roll include a roll coated with heat-resistant silicone rubber.
  • Peeling roll examples include a metal roll, a rubber-coated roll, and a resin-coated roll, and a metal roll having a high cooling capacity is preferable.
  • the fluororesin melted in the extruder 12 is extruded from the slit of the die 14 into a film shape.
  • a mold roll 16 and a backup roll 18 disposed below the die 14 and pressed with a predetermined pressure By passing the fluororesin between a mold roll 16 and a backup roll 18 disposed below the die 14 and pressed with a predetermined pressure, the fluororesin is formed into a film, and at the same time, The irregularities on the surface of the mold roll 16 are transferred to the surface.
  • the fluororesin film 20 that has passed between the mold roll 16 and the backup roll 18 moves along the mold roll 16 that rotates at a predetermined outer peripheral speed, and is peeled off from the mold roll 16 by the peeling roll 22 and simultaneously cooled. It is transferred to a winder (not shown).
  • the fluororesin a fluororesin having a fluorine atom content of 10% by mass or more is preferable, and a fluororesin having a fluorine atom content of 30% by mass or more is more preferable.
  • the fluororesin include polyvinylidene fluoride, polytetrafluoroethylene, polychlorotrifluoroethylene, polyhexafluoropropylene, polyvinyl fluoride, vinylidene fluoride-tetrafluoroethylene-hexafluoropropylene copolymer, and vinylidene fluoride-hexa.
  • ETFE ethylene-tetrafluoroethylene copolymer
  • ETFE ethylene-tetrafluoroethylene copolymer
  • tetrafluoroethylene-hexafluoropropylene copolymer perfluoro (alkyl vinyl ale) -tetrafluoroethylene copolymer, ethylene / Chlorotrifluoroethylene copolymer, etc.
  • ETFE tetrafluoroethylene-hexafluoropropylene copolymer, perfluoro (alkyl vinyl ether) -tetrafluoroethylene copolymer Coalescence
  • ETFE is more preferred.
  • Additives such as inorganic pigments, organic pigments, dyes, ultraviolet absorbers, infrared absorbers and the like may be appropriately added to the fluororesin for purposes such as ultraviolet cut, infrared cut, light scattering, and coloring.
  • the temperature in the extruder is preferably 280 to 360 ° C, more preferably 300 to 340 ° C when the fluororesin is ETFE. If the temperature in the extruder is less than 280 ° C, the viscosity of the resin does not decrease sufficiently, so the load of the screw that transports the resin becomes excessive, and the appearance of the product may deteriorate due to the low temperature resin flowing into the next die. is there. If the temperature in the extruder exceeds 360 ° C., the resin may be thermally decomposed and colored, or the strength may decrease due to a decrease in molecular weight.
  • the die temperature is preferably 280 to 360 ° C., more preferably 300 to 340 ° C. If the temperature of the die is less than 280 ° C., the viscosity of the resin is not sufficiently lowered, so that the so-called processing pressure becomes excessive, the product appearance is deteriorated, and the productivity is lowered. If the temperature of the die exceeds 360 ° C., the resin may be thermally decomposed and colored, or the strength may decrease due to a decrease in molecular weight.
  • the surface temperature of the mold roll is preferably 120 to 240 ° C., more preferably 140 to 220 ° C. when the fluororesin is ETFE. If the surface temperature of the mold roll is less than 120 ° C., the softening of ETFE becomes insufficient, and the unevenness transferability deteriorates. When the surface temperature of the mold roll exceeds 240 ° C., ETFE adheres to the mold roll, and peeling becomes difficult.
  • the heating method for the mold roll include a method of circulating a heat medium inside the roll, a method of heating an induction coil with a double structure, and a heating method using an electric heater.
  • the outer peripheral speed of the mold roll is preferably 1 to 300 m / min, more preferably 3 to 200 m / min when the fluororesin is ETFE.
  • the outer peripheral speed is less than 1 m / min, the productivity is lowered.
  • the outer peripheral speed exceeds 300 m / min, the unevenness transferability is poor at the above-described roll temperature and pressure.
  • the surface temperature of the backup roll is preferably 50 to 240 ° C., more preferably 60 to 140 ° C. when the fluororesin is ETFE.
  • the surface temperature of the backup roll is less than 50 ° C., the surface temperature of the mold roll is also lowered, so that the softening of ETFE becomes insufficient and the unevenness transferability is deteriorated.
  • ETFE sticks to the backup roll, and the adhesive force between the rubber coating and the core metal (metal roll) is lowered, so that the durability of the backup roll is significantly lowered.
  • Examples of the heating method for the backup roll include a method of circulating a heat medium inside the roll, a method of heating an induction coil with a double structure, and a heating method using an electric heater. Moreover, water cooling cooling, heat medium cooling, heat pump cooling etc. are mentioned as cooling for preventing a raise of surface temperature.
  • the linear pressure obtained by dividing the pressure applied when pressing the backup roll against the mold roll by the length in the width direction of the roll is preferably 2 to 200 kg / cm, and more preferably 5 to 100 kg / cm. If the linear pressure is less than 2 kg / cm, the pressability is insufficient, so that the transferability is poor and the uniformity tends to be poor.
  • the fluororesin film When the fluororesin film is peeled from the mold roll, the fluororesin film may be locally cooled to increase the film strength, and at the same time, the adhesion between the mold roll and the fluororesin film may be reduced and peeled stably.
  • a method for local cooling a method in which a fluororesin film is brought into contact with a cooling roll (for example, the release roll) disposed in the vicinity of the mold roll; a fluororesin film is applied to the cooling roll pressed against the mold roll at a very low pressure. The method of making it contact; The method of spraying air from the air knife provided orthogonal to the moving direction of a fluororesin film, etc. are mentioned.
  • the surface temperature of the cooling roll is preferably ⁇ 30 to 150 ° C., more preferably 20 to 110 ° C.
  • the air temperature is preferably ⁇ 10 to 50 ° C.
  • the tip wind speed of the air knife is preferably 0.5 to 20 m / sec, and more preferably 1 to 12 m / sec. The lower the temperature of the fluororesin film by local cooling, the easier the peeling of the fluororesin film from the mold roll will be. However, it may be difficult to maintain the surface temperature of the mold roll if it is cooled excessively. It is necessary to select appropriate conditions.
  • the fluororesin film peeled off from the mold roll may be wound as it is, or may be wound with a soft protective film stacked on the uneven surface for the purpose of protecting the uneven surface.
  • a soft protective film As a material for the protective film, polyolefin (polyethylene, polypropylene, etc.) is preferable.
  • a rubber coating roll is used as a backup roll, fine irregularities on the rubber surface may be transferred to the fluororesin film.
  • a heat resistant film such as a polyethylene terephthalate film
  • a die is interposed between a mold roll in which a plurality of irregularities having an inclined surface with an inclination angle of 20 to 75 degrees is formed on the surface, and a backup roll.
  • the extruded fluororesin is directly passed through and the fluororesin is formed into a film, and at the same time, the irregularities on the surface of the mold roll are transferred to the surface of the film.
  • a fluororesin film having irregularities (such as a prism shape) having a surface formed on the surface can be produced with high productivity and at low cost.
  • the film for agricultural houses of this invention is obtained by the manufacturing method of the fluororesin film of this invention.
  • the film for an agricultural house of the present invention is spread on a framework constructed of a metal pipe or the like with the surface on which the irregularities are formed facing the outdoor side of the agricultural house.
  • a well-known drip layer or the like may be provided on the indoor side surface of the agricultural house film of the present invention.
  • the thickness of the agricultural house film of the present invention is preferably 20 ⁇ m or more, more preferably 50 ⁇ m or more from the viewpoint of film strength, and preferably 300 ⁇ m or less from the viewpoint of suppressing an increase in mass or a decrease in light transmittance. 200 ⁇ m or less is more preferable.
  • the skin material film for solar cell panels of the present invention is obtained by the method for producing a fluororesin film of the present invention.
  • crystalline silicon, amorphous silicon, compound, organic, etc. have been researched and developed, making it easy to increase the area, and the amount of battery cell semiconductors used is significantly less than that of crystalline silicon. Therefore, the growth of thin film amorphous silicon, compound, and organic systems is large.
  • the skin material film for solar cell panel of the present invention is suitable as a skin material film for thin film amorphous silicon-based, semiconductor-based, organic, etc. thin-film solar cells for the following reasons.
  • the skin material film for a solar cell panel of the present invention is suitable as a skin material film for a thin film solar cell because it can scatter sunlight due to surface irregularities.
  • the thickness of the skin material film for solar cell panel of the present invention is preferably 20 ⁇ m or more, more preferably 50 ⁇ m or more from the viewpoint of film strength, and 300 ⁇ m from the viewpoint of suppressing an increase in mass or a decrease in light transmittance.
  • the following is preferable, and 200 ⁇ m or less is more preferable.
  • the film is obtained by the method for producing the fluororesin film of the present invention, the incident angle dependency of the light transmission amount is although it is a small fluororesin film, it is less expensive than the conventional one.
  • Example 1 is an example and Example 2 is a comparative example.
  • a light source 30 manufactured by Toshiba Corporation, metal hide lamp DR400 / T (L)
  • an illuminance meter 32 manufactured by ASONE, LM-332
  • the distance was 1 m.
  • the fluororesin film 20 was attached to the front surface of the sensor portion 34 so that the longitudinal direction of the ridges and grooves of the fluororesin film 20 was the vertical direction, and the surface on which the irregularities were formed was directed to the light source 30. .
  • the incident angle of light to the fluororesin film 20 is 0 degrees, 45 degrees
  • the illuminance was measured at 60 degrees and 85 degrees.
  • the illuminance when no film was attached to the front surface of the sensor unit 34 was also measured.
  • Example 1 A 30 mm diameter extruder, a die connected to the tip of the extruder with a width of 250 mm, a gap with a gap of 0.5 mm, and a film take-up machine consisting of a mold roll and a rubber-covered backup roll are prepared. did.
  • the mold roll was produced as follows. An electroless plating layer of a nickel phosphorus compound was provided on the surface of a carbon steel roll made of carbon steel having an outer diameter of 150 mm and heated inside through a heat transfer oil, and then ground to form a plating layer of about 200 ⁇ m. .
  • the roll is attached to a precision lathe (manufactured by Toshiba Machine Co., Ltd.), and a continuous V-shaped groove having an average interval of 20 ⁇ m and a depth of 10 ⁇ m is formed over the entire circumference of the roll by a grinding tool having a cutting edge angle of 90 degrees.
  • a die roll was obtained in which the ridges having a cross-sectional triangle having an inclination angle of 45 degrees and grooves having a V-shaped cross section were formed alternately and in parallel on the surface.
  • a rubber-coated roll having an outer diameter of 150 mm and a silicone rubber lined with a thickness of 5 mm and a rubber hardness of 65 degrees was used on the surface of the metal roll.
  • An ethylene-tetrafluoroethylene copolymer (manufactured by Asahi Glass Co., Ltd., Fluon ETFE LM720AP) was charged into an extruder and melted, and then extruded from a die connected to the tip of the extruder.
  • the typical temperature in the extruder and the die was 320 ° C., and the amount of extrusion was adjusted to 2.2 kg / hour by adjusting the number of rotations of the screw.
  • the extruded resin By passing the extruded resin while pressing the backup roll through the mold roll at a linear pressure of 10.6 kg / cm, the film is formed into a film, and at the same time, the unevenness formed on the surface of the mold roll is transferred to the surface of the film.
  • a fluororesin film having a thickness of 100 ⁇ m was obtained.
  • the surface temperature of the mold roll was set to 170 ° C., and the roll outer peripheral speed was 2.5 m / min.
  • An electron micrograph of the obtained fluororesin film is shown in FIGS.
  • the evaluation results of the fluororesin film are shown in Table 1.
  • Example 2 A fluororesin film having a smooth surface and a thickness of 100 ⁇ m was obtained in the same manner as in Example 1 except that the mold roll in Example 1 was changed to a mirror roll having a hard chrome plating on the surface. The evaluation results of the fluororesin film are shown in Table 1.
  • the fluororesin film obtained by the production method of the present invention has a small incident angle dependency of the light transmission amount, and is useful as a film for agricultural house or a skin material film for solar cell panel. It should be noted that the entire contents of the specification, claims, drawings and abstract of Japanese Patent Application No. 2009-002511 filed on January 8, 2009 are cited herein as disclosure of the specification of the present invention. Incorporated.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)

Abstract

L'invention propose un procédé de production à une productivité élevée et à un coût réduit d'un film de résine fluorée sur la surface duquel sont formés des motifs convexes et des motifs concaves (par exemple de forme prismatique) dont la surface est inclinée à un angle d'inclinaison prédéterminé, ainsi qu'un film peu coûteux pour serres agricoles et un film de matériau de peau de surface pour panneaux de cellules solaires comprenant un film de résine fluorée dont le niveau de transmission de lumière dépend peu de l'angle d'incidence. Un procédé de production d'un film (20) de résine fluorée dans lequel une résine fluorée extrudée par une filière (14) est passée entre un rouleau de gaufrage (16) à la surface duquel sont formés plusieurs motifs convexes et/ou motifs concaves dont les surfaces inclinées ont un angle d'inclinaison de 20 à 75 degrés et un rouleau de dos (18), pour mouler la résine fluorée en un film et en même temps transférer les motifs convexes et/ou les motifs concaves sur une surface du film.
PCT/JP2009/071798 2009-01-08 2009-12-28 Procédé de production d'un film de résine fluorée traité en surface Ceased WO2010079723A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2009002511A JP2012056083A (ja) 2009-01-08 2009-01-08 フッ素樹脂フィルムの製造方法、および農業ハウス用フィルムならびに太陽電池パネル用表皮材フィルム
JP2009-002511 2009-01-08

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WO2010079723A1 true WO2010079723A1 (fr) 2010-07-15

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TW (1) TW201031513A (fr)
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EP2611611A4 (fr) * 2010-08-31 2015-06-10 Saint Gobain Performance Plast Film de protection à motif
KR20180037137A (ko) * 2015-08-04 2018-04-11 아사히 가라스 가부시키가이샤 불소 수지 필름의 제조 방법
CN108582627A (zh) * 2018-05-04 2018-09-28 苏州奥美材料科技有限公司 一种一次成型喇叭网的生产装置的成型机构
JP2019519942A (ja) * 2016-06-02 2019-07-11 江▲蘇▼舜大新能源科技有限公司Ｊｉａｎｇｓｕ Ｓｕｎｄａ Ｎｅｗ Ｅｎｅｒｇｙ Ｔｅｃｈｎｏｌｏｇｙ Ｃｏ．， Ｌｔｄ 軽量光起電力モジュール

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CN103094382B (zh) * 2013-01-31 2015-08-19 上海晶澳太阳能科技有限公司 一种预设安装倾角的光伏组件面板及光伏组件和该光伏组件的制作方法

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JP2000323734A (ja) * 1999-05-06 2000-11-24 Dainippon Printing Co Ltd 太陽電池用フィルムおよびそのフィルムを用いた太陽電池モジュール
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EP2611611A4 (fr) * 2010-08-31 2015-06-10 Saint Gobain Performance Plast Film de protection à motif
KR20180037137A (ko) * 2015-08-04 2018-04-11 아사히 가라스 가부시키가이샤 불소 수지 필름의 제조 방법
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JP2019519942A (ja) * 2016-06-02 2019-07-11 江▲蘇▼舜大新能源科技有限公司Ｊｉａｎｇｓｕ Ｓｕｎｄａ Ｎｅｗ Ｅｎｅｒｇｙ Ｔｅｃｈｎｏｌｏｇｙ Ｃｏ．， Ｌｔｄ 軽量光起電力モジュール
CN108582627A (zh) * 2018-05-04 2018-09-28 苏州奥美材料科技有限公司 一种一次成型喇叭网的生产装置的成型机构

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