WO2010001751A1 - 樹脂フィルムおよびその製造方法 - Google Patents
樹脂フィルムおよびその製造方法 Download PDFInfo
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- WO2010001751A1 WO2010001751A1 PCT/JP2009/061300 JP2009061300W WO2010001751A1 WO 2010001751 A1 WO2010001751 A1 WO 2010001751A1 JP 2009061300 W JP2009061300 W JP 2009061300W WO 2010001751 A1 WO2010001751 A1 WO 2010001751A1
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- resin film
- film
- resin
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- 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
- B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
- B29C59/007—Forming single grooves or ribs, e.g. tear lines, weak spots
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- 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
- B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
-
- 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
- B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
- B29C37/0025—Applying surface layers, e.g. coatings, decorative layers, printed layers, to articles during shaping, e.g. in-mould printing
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- 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
- B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
- B29C41/24—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of indefinite length
- B29C41/28—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of indefinite length by depositing flowable material on an endless belt
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- 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
- B29C2791/00—Shaping characteristics in general
- B29C2791/004—Shaping under special conditions
- B29C2791/009—Using laser
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- 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
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
- B29C55/04—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique
- B29C55/06—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique parallel with the direction of feed
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- 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
- B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
- B29K2995/0018—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular optical properties, e.g. fluorescent or phosphorescent
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2007/00—Flat articles, e.g. films or sheets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2016/00—Articles with corrugations or pleats
Definitions
- the present invention relates to a resin film, and in particular, to a long resin film that can be appropriately rolled and a method for producing the same.
- resin films have been widely used in various fields in view of their chemical characteristics, mechanical characteristics, electrical characteristics, and the like.
- various resin films for example, a base film of a polarizing plate, a polarizing element film, a transparent protective film for protecting the polarizing element film, and the like are disposed in the image display region of the liquid crystal display device.
- a resin film for example, a resin film excellent in translucency such as a cellulose ester resin film is used.
- Such a resin film is manufactured in a long shape by, for example, a melt casting film forming method or a solution casting film forming method.
- the resin film is wound in a roll shape around a film core by a winder. Taken.
- the end face of the wound film (rolled film) is displaced (winding deviation), or air is caught when the film is wound up,
- the problem is that the film is deformed when the entrained air escapes (film deformation).
- FIG. 6 is an enlarged schematic development view of the outer peripheral surface of the embossing ring in Patent Document 1.
- FIG. 7 is a diagram for explaining embossing formed by hot embossing.
- FIG. 7A is an enlarged cross-sectional view of the embossed portion
- FIG. 7B is an enlarged cross-sectional photograph of the embossed portion made into an image by the image reading apparatus.
- FIG. 8 is an enlarged cross-sectional view of a PET film having an uneven portion in Patent Document 2.
- Patent Document 1 discloses a stable winding that does not cause a wrinkle defect or the like without causing a problem of deviation when a film is wound as an intermediate product in a roll shape. It is described that it is possible.
- the embossing process in the film winding method disclosed in Patent Document 1 is presumed to be hot embossing in which the embossing is pressed onto the film while heating.
- the structure shown in FIG. An embossed part is formed.
- the embossed portion 1010 has a concave portion 1012 formed on one main surface of the film 1011 by hot embossing, and first convex portions 1013 and 1013 are formed on both sides thereof. Further, as the concave portion 1012 is formed, the film 1011 Second convex portion 1014 is formed on the other main surface.
- a film 2001 disclosed in Patent Document 2 is a long film 2001 that is wound around a drum, and is irradiated with laser beams 2004 on both side edges of one surface 2005 to local areas. It melts to form a concave portion 2006, and convex portions 2007 and 2007 are formed on both sides thereof (FIG. 8 shows one of both side edges). According to Patent Document 2, even if air is taken in together with the winding of the film by such a configuration, the air can escape to a slight gap formed between the overlapping films and is wound up for that purpose. It is described that the film is regularly wound around the drum and does not shift laterally.
- the present invention has been made in view of the above circumstances, and an object of the present invention is to provide a resin film and a method for producing the resin film that can further suppress film deformation.
- the resin film is a long resin film having an embossed portion along the longitudinal direction at least on both side end portions, and the embossed portion has a pair of cross sections in a direction perpendicular to the longitudinal direction. It has a convex part and the recessed part formed in the other surface facing the one surface of the said resin film in which the said pair of convex part is formed between a pair of said convex parts.
- the embossed portion includes a pair of convex portions and a concave portion, and the concave portion faces one surface of the resin film formed with the pair of convex portions between the pair of convex portions. It is formed on the other side. For this reason, even if the resin film is wound in a roll shape and stacked, there is no protrusion on the other surface facing the one surface where the pair of protrusions are formed, and the other surface is a pair of protrusions.
- the concave portion is formed at a position different from the position where the pair of convex portions are formed, there is no concave portion into which the resin material of the convex portion enters even if the pair of convex portions is about to be crushed. Further, as a result of the protrusions being less likely to be crushed, the resin material of the protrusions is not entrapped, and the recesses are also less likely to be crushed. Therefore, even if air is caught when the film is wound up in a roll shape, the trapped air can be efficiently removed by the pair of convex portions and concave portions, and film deformation can be effectively suppressed. It becomes possible.
- the pair of convex portions and concave portions are continuously formed along the longitudinal direction.
- the embossed portion further includes a second concave portion on one surface of the resin film on which the pair of convex portions are formed between the pair of convex portions.
- the air can be extracted more efficiently, and film deformation can be further suppressed.
- the height of the convex portion is 3 to 30 ⁇ m from the smooth surface on one surface of the resin film, and the depth of the concave portion is a smooth surface on the other surface of the resin film.
- the film thickness of the resin film in the portion where the concave portion is formed is 1% or more from the surface, and is 90% or less of the film thickness of the resin film.
- the height of the convex portion is lower than 3 ⁇ m, winding deviation occurs, which is not preferable.
- the height of the convex portion is higher than 30 ⁇ m, the resin film is bent when wound in a roll shape. It is not preferable because the film sticks.
- the depth of the recess is shallower than 1 ⁇ m, it is not preferable because air is difficult to escape and film deformation occurs. And by making the depth of a recessed part 1 micrometer or more, a pair of convex part and a recessed part mutually interact as mentioned above, and it becomes difficult to be crushed.
- the recess becomes shallower than the thickness of the resin film, making it difficult for air to escape and causing film deformation. This is not preferable.
- the resin film has a thickness of 30 ⁇ m to 90 ⁇ m.
- the film thickness is greater than 90 ⁇ m, the recesses are small, air is difficult to escape, and film deformation is likely to occur, which is not preferable.
- the film thickness is smaller than 30 ⁇ m, it is not preferable because holes are easily formed in the film when the embossed portion is formed. That is, if there is a hole in the film, the support to the convex portion is weakened, so that the convex portion is easily crushed, and as a result, it is difficult for air to escape and film deformation is likely to occur.
- a resin film manufacturing method for manufacturing any of the above-described resin films, wherein the embossed portion is formed by a non-contact heating unit that heats the resin film in a non-contact manner. It is formed.
- the resin film can be locally heated when the embossed portion is formed.
- the resin film can be locally dissolved and can be rapidly cooled by stopping the heating.
- a recessed part can be formed in the other surface facing the said one surface between a pair of convex parts. Therefore, the resin film formed by the manufacturing method having such a configuration can further suppress film deformation.
- the non-contact heating unit is a light irradiation heating unit that heats the resin film in a non-contact manner by irradiating light.
- the resin film when the resin film is locally heated, the resin film can be heated relatively accurately, for example, by collecting the light by the optical system.
- the light irradiation heating unit is a laser heating device that heats the resin film in a non-contact manner by irradiating a laser beam.
- the laser beam since the laser beam is used, energy can be efficiently irradiated locally, and the embossed portion can be formed in a relatively short time.
- a resin film manufacturing method for manufacturing any of the above-described resin films, wherein the recess is formed by a non-contact heating unit that heats the resin film in a non-contact manner.
- the convex portion is formed by an ink jet printing unit that sprays a resin solution onto the resin film.
- FIG. 3 is an enlarged schematic development view of an outer peripheral surface of an emboss ring in Patent Document 1. It is a figure for demonstrating the embossing formed by hot embossing. It is an expanded sectional view of PET film in which the uneven part in patent documents 2 was formed.
- FIG. 1 is a plan view of a resin film in the embodiment.
- 2 is a view showing a cross section in a direction (AA line) orthogonal to the longitudinal direction of the resin film of FIG. 2A is a schematic cross-sectional view taken along line AA in FIG. 1, and
- FIG. 2B is an enlarged cross-sectional photograph taken along line AA in FIG. 1 using an image reading apparatus.
- a resin film 11 is a strip-like long film having a predetermined substantially constant width and a predetermined substantially constant film thickness, and is substantially linear along the longitudinal direction X at least at both side ends 12, 12. It has the embossed parts 13 and 13 formed in the shape.
- the embossed portion 13 may be formed in a substantially linear shape along the longitudinal direction X, not only between the side end portions 12 and 12 but also between the side end portions 12 and 12.
- the embossed portion 13 may be further formed along the longitudinal direction X at a substantially central portion in the width direction Y of the resin film 11.
- the embossing part 13 may be formed over the full length of the elongate resin film 11, and may be formed intermittently.
- the predetermined constant width is appropriately set according to, for example, the use and specifications of the resin film 11, and includes, for example, use in a large-sized liquid crystal display device, use efficiency and production efficiency of the resin film during polarizing plate processing, etc. From the viewpoint, it is preferably 1000 to 4000 mm.
- the predetermined constant film thickness is appropriately set according to, for example, the use and specifications of the resin film 11, for example, formation of a recess having an appropriate depth, thinning of the liquid crystal display device, and stabilization of production of the resin film, etc. From this viewpoint, it is preferably 30 ⁇ m to 90 ⁇ m, and from the above viewpoint, more preferably 30 ⁇ m to 80 ⁇ m.
- the film thickness means an average film thickness, and the film thickness is measured at intervals of 50 mm in the width direction of the resin film with a contact-type film thickness meter manufactured by Mitutoyo Corporation. Shown as thickness.
- the resin film 11 preferably has a length of 2000 m to 6000 m, for example, from the viewpoint of use efficiency and production efficiency of the resin film during polarizing plate processing.
- the material of the resin film 11 is appropriately set according to, for example, the use and specifications of the resin film 11 and is not particularly limited.
- the material is, for example, cellulose diacetate resin, cellulose triacetate resin, cellulose acetate butyrate resin, cellulose acetate propio Cellulose ester resins such as nate resins; Polyester resins such as polyethylene terephthalate resins and polyethylene naphthalate resins; Acrylic resins such as polymethyl methacrylate resins; Polysulfone (including polyethersulfone) resins, polyethylene resins, polypropylene resins, Cellophane, polyvinylidene chloride resin, polyvinyl alcohol resin, ethylene vinyl alcohol resin, syndiotactic polystyrene resin, cycloolefin resin, polymethylpe Polycarbonate resins; vinyl resins such as polymethylpentene resin polyarylate resins; polyether ketone resins; polyether ketone imide resin; can be mentioned flu
- cellulose is excellent in adhesiveness with a hard coat layer and the like, and is optically isotropic.
- Ester resins, cycloolefin resins, polycarbonate resins, and polysulfone (including polyethersulfone) resins are preferred.
- cellulose ester resins are preferable, and among cellulose ester resins, cellulose acetate resin, cellulose propionate resin, cellulose butyrate resin, cellulose acetate butyrate resin, and cellulose acetate propionate resin are preferable, and cellulose acetate propionate is preferable.
- Nate resins are particularly preferred.
- the transparency means that the visible light transmittance is 60% or more, preferably 80% or more, more preferably 90% or more.
- the cellulose ester resin has a mixed fatty acid ester of cellulose where x and y satisfy the following formulas (I) and (II), where x is the substitution degree of the acetyl group and y is the substitution degree of the propionyl group or butyryl group.
- a cellulose ester resin is preferred. 2.0 ⁇ x + y ⁇ 2.6 (I) 0.1 ⁇ y ⁇ 1.2 (II)
- the portion not substituted with an acyl group usually exists as a hydroxyl group.
- These cellulose ester resins can be synthesized by a known method. The method for measuring the substitution degree of the acyl group can be measured according to the provisions of ASTM-D817-96.
- the cellulose that is the raw material of the cellulose ester-based resin is not particularly limited, and examples thereof include cotton linter, wood pulp (derived from coniferous tree, derived from broadleaf tree), kenaf and the like. Moreover, the cellulose ester-type resin obtained from them can be mixed and used in arbitrary ratios, respectively.
- the acylating agent is an acid anhydride (acetic anhydride, propionic anhydride, butyric anhydride)
- these cellulose ester resins use an organic acid such as acetic acid or an organic solvent such as methylene chloride, It can be obtained by reacting with a cellulose raw material using such a protic catalyst.
- the reaction is performed using a basic compound such as an amine as a catalyst. More specifically, it can be synthesized with reference to, for example, the method described in JP-A-10-45804.
- the cellulose ester resin is obtained by adjusting the amount of the acylating agent in accordance with the degree of substitution, and the cellulose ester resin reacts with the hydroxyl group of the cellulose molecule.
- Cellulose molecules are composed of many glucose units linked together, and the glucose unit has three hydroxyl groups. The number of acyl groups derived from these three hydroxyl groups is called the degree of substitution (mol%).
- cellulose triacetate has acetyl groups bonded to all three hydroxyl groups of the glucose unit (actually 2.6 to 3.0).
- a propionate group or a butyrate group is bonded in addition to an acetyl group such as a cellulose acetate propionate resin, a cellulose acetate butyrate resin, and a cellulose acetate propionate butyrate resin.
- a mixed fatty acid ester of cellulose is preferably used.
- a cellulose acetate propionate resin containing a propionate group as a substituent is excellent in water resistance and is particularly useful as a film for a liquid crystal image display device.
- the number average molecular weight of the cellulose ester-based resin is preferably 40,000 to 200,000 in view of strong mechanical strength when molded into a resin film, and an appropriate dope viscosity in the solution casting film forming method. More preferably, it is 50,000 to 150,000.
- the weight average molecular weight (Mw) / number average molecular weight (Mn) is preferably in the range of 1.4 to 4.5.
- Such a resin film 11 can be manufactured by, for example, a melt casting film forming method and a solution casting film forming method.
- the melt casting film forming method is a method in which a resin melt obtained by heating and melting a raw material resin is cast on a support, the casting film is cooled and solidified, and then the solidified casting film is wound as a resin film 11. It is a method to take.
- the solution casting film-forming method is generally a method in which a resin solution in which a raw material resin is dissolved in a solvent is cast on a support, dried while transporting the casting film, and then the dried casting film is made into a resin. In this method, the film 11 is wound up.
- the film thickness of the resin film 11 is more easily uniformed, and the resin film 11.
- production by a solution casting film forming method is preferable because birefringence hardly occurs.
- the embossed portion 13 is formed in a substantially straight line along the longitudinal direction X and a pair of convex portions 13 b and 13 b formed in a substantially straight line along the longitudinal direction X. And a concave portion (first concave portion) 13a.
- the concave portion 13a is one main surface (surface) of the resin film 11 between which the pair of convex portions 13b, 13b are formed, between the pair of convex portions 13b, 13b. It is formed on the other main surface (back surface) 14b opposite to 14a.
- FIGS. 1 and 2 the embossed portion 13 is formed in a substantially straight line along the longitudinal direction X and a pair of convex portions 13 b and 13 b formed in a substantially straight line along the longitudinal direction X.
- a concave portion (first concave portion) 13a is one main surface (surface) of the resin film 11 between which the pair of convex portions 13b, 13b are formed, between the pair of convex portions 13b, 13
- the embossed portion 13 is formed on one main surface 14a of the resin film 11 on which the pair of convex portions 13b and 13b are formed between the pair of convex portions 13b and 13b.
- the embossed portion 13 ⁇ / b> A further includes a second recess 13 c formed substantially linearly along the longitudinal direction X.
- the height of the convex portion 13b is empirically found that if the height of the convex portion 13b is lower than 3 ⁇ m, winding deviation occurs, which is not preferable. On the other hand, if the height of the convex portion 13b is higher than 30 ⁇ m, When the film is wound in a roll shape, the resin film is bent and the film is not preferable.
- the thickness is preferably 3 ⁇ m to 30 ⁇ m from the smooth surface 14a on the one main surface 14a of the resin film 11. From the above viewpoint, the height of the convex portion 13b is more preferably 5 ⁇ m to 30 ⁇ m, and further preferably 5 ⁇ m to 28 ⁇ m.
- the depth of the recess 13a is not preferable if the depth of the recess 13a is shallower than 1 ⁇ m, because it is difficult for air to escape and film deformation occurs, and by setting the depth of the recess 13a to 1 ⁇ m or more, Since the pair of convex portions 13b and 13b and the concave portion 13a interact with each other and are not easily crushed, the thickness is preferably 1 ⁇ m or more from the smooth surface 14b on the other main surface 14b of the resin film 11. From the above viewpoint, the depth of the recess 13a is more preferably 2 ⁇ m or more, and further preferably 3 ⁇ m or more.
- the film thickness of the resin film 11 in the part in which the recessed part 13a was formed exceeds 90% of the film thickness of the resin film 11 in the part in which the recessed part 13a was formed, the resin film 11 Since the concave portion 13a is shallower than the film thickness, it is difficult for air to escape and film deformation occurs, which is not preferable, and is preferably 90% or less of the film thickness of the resin film 11. From the said viewpoint, the film thickness of the resin film 11 in the part in which the recessed part 13a was formed becomes like this. More preferably, it is 85% or less, More preferably, it is 80% or less.
- the resin film 11 having such a structure is manufactured, for example, as follows, and wound up in a roll shape.
- FIG. 3 is a schematic diagram showing a configuration of a resin film manufacturing apparatus according to the embodiment.
- the production apparatus S for the resin film 11 includes an endless belt support 111, a casting die 112, a peeling roller 113, a stretching / drying device 114, a non-contact heating unit 115, and a winding roller 116. It is prepared for.
- the casting die 112 casts a resin solution (dope) 117 in which a raw material resin, for example, a transparent resin is dissolved in a solvent, onto the surface of the endless belt support 111.
- the endless belt support 111 forms a casting film (web) made of the resin solution 117 cast from the casting die 112 and is dried while being conveyed.
- the peeling roller 113 peels the cast film from the endless belt support 111.
- the peeled cast film is conveyed to the stretching / drying device 114, stretched by the stretching / drying device 114, and further dried.
- the dried cast film is conveyed to the non-contact heating unit 115 as the resin film 11, and the non-contact heating unit 115 forms the embossed portions 13 and 13 at both side end portions 12 and 12, respectively.
- the resin film 11 on which the embossed portions 13 and 13 are formed is wound around the winding roller 116.
- the non-contact heating unit 115 is a device that heats the resin film 11 in a non-contact manner at a predetermined temperature. More specifically, in the present embodiment, the non-contact heating unit 115 is a light irradiation heating unit 115 that heats the resin film with a predetermined light intensity in a non-contact manner by irradiating light. More specifically, in this embodiment, the non-contact heating unit (light irradiation heating unit) 115 heats the resin film 11 in a non-contact manner with a predetermined light intensity by irradiating laser light.
- Laser heating device includes a relatively high-power laser device such as a carbon dioxide laser or a YAG laser.
- the embossed part forming step for forming the embossed part 13 (13A) when one main surface (front surface) 14a of the resin film 11 is locally heated at a predetermined temperature set in advance by the non-contact heating part 115, the resin The film 11 is melted and a second recess 13c is formed in the heated portion, and a pair of projections 13b and 13b are formed on both sides of the second recess 13c.
- the local heating is stopped, the melted resin film 11 is contracted and solidified by rapid cooling, and a recess 13a is formed on the other surface (back surface) 14b of the resin film 11 in the heated portion.
- the resin film 11 when one surface (surface) 14a of the resin film 11 is heated with a predetermined light intensity locally set by the laser heating device 115, the resin film 11 is dissolved.
- the second recess 13c is formed in the heated portion, and a pair of protrusions 13b and 13b are formed on both sides of the second recess 13c.
- the local heating is stopped, the melted resin film 11 is contracted and solidified by rapid cooling, and a recess 13a is formed on the other main surface (back surface) 14b of the resin film 11 in the heated portion.
- a laser heating device 115 since laser light is used, energy can be efficiently irradiated locally, and the embossed portion 13 can be formed in a relatively short time.
- the laser beam irradiation time (heating time) is determined by the transport speed (winding speed) of the resin film 11. Even if the laser heating device 115 continuously irradiates the laser beam, since the resin film 11 is conveyed, it is locally heated for a predetermined irradiation time (heating time).
- the non-contact heating unit 115 includes the laser heating device 115.
- the non-contact heating unit 115 condenses light with a relatively high-power lamp such as a high-pressure sodium lamp, a mercury lamp, and a halogen lamp. And an optical system that condenses the light of the lamp by the optical system and locally heats the resin film 11 in a non-contact manner.
- the non-contact heating unit 115 includes, for example, a microwave generator that generates a microwave and a condensing device that uses a diffraction phenomenon such as a zone plate, and collects the microwave of the microwave generator.
- the apparatus which concentrates by an apparatus and heats the resin film 11 locally without contact may be sufficient.
- the resin film 11 can be locally heated relatively accurately.
- the non-contact heating unit 115 may be a device that includes a resistance heater and locally heats the resin film 11 in a non-contact manner by bringing the resistance heater close to the resin film 11.
- Such a non-contact heating unit 115 can heat the resin film 11 with a relatively simple and inexpensive configuration.
- the resin film 11 having the embossed portion 13 including the pair of convex portions 13b and 13b and the concave portion 13a at at least both side end portions 12 and 12 the resin film 11 is wound in a roll shape and overlapped.
- the other main surface 14b opposite to the one main surface 14a on which the pair of protrusions 13b and 13b are formed has no protrusion as described in the background art, and the other main surface 14b has a pair of protrusions.
- the concave portion 13a is formed at a position different from the position where the portions 13b and 13b are formed, there is no concave portion into which the resin material of the convex portions 13b and 13b enters even if the pair of convex portions 13b and 13b are crushed.
- the pair of convex portions 13b and 13b are not easily crushed.
- the resin material of the protrusion 13b portion does not enter, so the recess 13a is also less likely to be crushed.
- the resin film 11 concerning this embodiment is further provided with the 2nd recessed part 13c, the said air can be extracted more efficiently and it becomes possible to further suppress a film deformation
- the embossed portion 13 is the embossed portion 13A having the second recessed portion 13c as shown in FIG. 2, but of course, for example, as shown in FIG. There may be no embossed portion 13B.
- FIG. 4 is a view showing a cross section of another form taken along line AA in FIG.
- FIG. 5 is a view for explaining a method of manufacturing the embossed portion having the structure shown in FIG.
- the embossed portion 13B shown in FIG. 4 includes a pair of convex portions 13e and 13e formed in a substantially linear shape along the longitudinal direction X, and a concave portion 13d formed in a substantially linear shape along the longitudinal direction X.
- the concave portion 13d is formed on the other main surface (back surface) 14b facing the one main surface (front surface) 14a of the resin film 11 on which the pair of convex portions 13e, 13e are formed, between the pair of convex portions 13e, 13e. Is formed.
- a recess 13d is formed on the other main surface 14b of the resin film 11 by the non-contact heating portion 115 (recess forming step, FIG. 5A). ).
- the recess forming step when the other main surface 14b of the resin film 11 is locally heated with a predetermined strength set in advance by the non-contact heating unit 115, the resin film 11 is dissolved, and the heated portion is A recess 13d is formed. More specifically, in the present embodiment, when the other main surface 14b of the resin film 11 is heated with a predetermined light intensity locally set by the laser heating device 115, the resin film 11 is dissolved, A recess 13d is formed in the heated portion.
- the light intensity of the laser beam irradiated to form the recess 13d is that of the laser beam irradiated to form the pair of protrusions 13b and the recess 13c. Less than light intensity.
- the convex portion forming unit 118 includes, for example, an ink jet printing unit 118 that prints a resin solution on the resin film 11 by an ink jet method in which a resin solution in which a raw material resin, for example, a transparent resin is dissolved, is sprayed.
- the same material as the resin film 11 is used for the resin solution used in the inkjet printing unit 118.
- a resin solution is sprayed and dried by the inkjet printing part 118, and a pair of convex parts 13e and 13e are formed.
- the embossed portion 13B having the structure shown in FIG. 4 is formed by the concave portion forming step and the convex portion forming step. However, even if the convex portion forming step is performed first and then the concave portion forming step is performed. Good.
- a triacetyl cellulose film as shown in Table 1 was formed by the solution casting film forming method and embossing. That is, first, the dove is prepared. Next, the dope is cast on the belt support to form a cast film. This cast film was peeled off from the belt support, stretched in the stretching process, dried in the drying process, and the film width was slit to 2000 mm. Thereafter, in the embossed part forming step, the embossed part was applied with a width of 10 mm at both ends of the film. In this embossed portion forming step, a carbon dioxide laser device having a wavelength of 10.6 ⁇ m and a rated output of 60 W was used.
- the laser beam was irradiated with a predetermined output (light intensity) when the embossed portion was formed on the triacetyl cellulose film.
- the output of the laser light was appropriately adjusted according to the film thickness of the triacetyl cellulose film, the height of the pair of convex portions, the depth of the concave portions, and the like.
- a triacetyl cellulose film was formed by a solution casting film forming method as in the example, and an embossed portion having a structure shown in FIG. 7 was formed on the triacetyl cellulose film by hot embossing.
- triacetyl cellulose films were each rolled into a roll having a length of 4000 m, and the films were evaluated.
- the evaluation of the film was made by producing 100 film windings of each condition, and by visually measuring the number of minute irregularities due to film deformation in the film winding, the occurrence of the film deformation was observed and evaluated according to the following criteria: did.
- X There is film winding in which the number of minute irregularities is 2 or more.
- the height of the convex portion is 10 ⁇ m from the smooth surface of the film
- the depth of the concave portion is 1 ⁇ m or more from the smooth surface of the film
- the film thickness of the film in the portion where the concave portion is formed is film
- the film thickness was 30 ⁇ m to 90 ⁇ m
- the number of minute irregularities in all the wound films was 0 (Examples 2 to 4).
- the film thickness is 100 ⁇ m
- the height of the convex portion is 10 ⁇ m from the smooth surface of the film
- the depth of the concave portion is 0.5 ⁇ m from the smooth surface of the film
- the portion where the concave portion is formed The film thickness is 97% of the film thickness, the number of fine irregularities is 1 or more, and there are no more than 4 film windings, and the number of minute irregularities is 2 or more. (Example 1).
- the height of the convex portion is 12 ⁇ m from the smooth surface of the film
- the depth of the concave portion is 11 ⁇ m or more from the smooth surface of the film
- the film thickness of the film in the portion where the concave portion is formed is the film thickness of the film.
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Abstract
Description
2.0≦x+y≦2.6 ・・・(I)
0.1≦y≦1.2 ・・・(II)
また、上記式(I)及び(II)に加えて、下記式(III)及び(IV)を満たすセルロースの混合脂肪酸エステルを有するセルロースエステル系樹脂(総アシル基置換度=x+y)がより好ましい。
2.4≦x+y≦2.6 ・・・(III)
1.4≦x≦2.3 ・・・(IV)
さらに、上記式(I)~(IV)に加えて、下記式(V)及び(VI)を満たすセルロースアセテートプロピオネート樹脂またはセルロースアセテートブチレート樹脂(総アシル基置換度=x+y)が特に好ましい。
1.7≦x≦2.3 ・・・(V)
0.1≦y≦0.9 ・・・(VI)
また、アシル基で置換されていない部分は、通常水酸基として存在している。これらのセルロースエステル系樹脂は、公知の方法で合成することができる。アシル基の置換度の測定方法は、ASTM-D817-96の規定に準じて測定することができる。
◎;全ての巻きフィルムの微小凹凸の個数が0個である、
○;微小凹凸の個数が1個であるフィルム巻きが3本以下であり、かつ、微小凹凸の個数が2個以上であるフィルム巻きがない、
△;微小凹凸の個数が1個であるフィルム巻きが4本以上であり、かつ、微小凹凸の個数が2個以上であるフィルム巻きがない、
×;微小凹凸の個数が2個以上であるフィルム巻きがある。
13、13A、13B エンボス部
13a、13d 凹部(第1凹部)
13b、13e 凸部
13c 第2凹部
115 非接触加熱部(光照射加熱部、レーザ加熱装置)
118 凸部形成部
Claims (9)
- 少なくとも両側端部に長手方向に沿ってエンボス部を有する長尺な樹脂フィルムであって、
前記エンボス部は前記長手方向に直交する方向における断面において、一対の凸部と、
前記一対の凸部の間における、前記一対の凸部が形成されている前記樹脂フィルムの一方面に対向する他方面に形成されている凹部とを有すること
を特徴とする樹脂フィルム。 - 前記一対の凸部および凹部は、前記長手方向に沿って連続的に形成されていること
を特徴とする請求項1に記載の樹脂フィルム。 - 前記エンボス部は、前記一対の凸部の間における、前記一対の凸部が形成されている前記樹脂フィルムの一方面に、第2凹部をさらに備えること
を特徴とする請求項1または請求項2に記載の樹脂フィルム。 - 前記凸部の高さは、前記樹脂フィルムの一方面における平滑面から3~30μmであり、
前記凹部の深さは、前記樹脂フィルムの他方面における平滑面から1μm以上であり、
前記凹部が形成された部分における前記樹脂フィルムの膜厚は、前記樹脂フィルムの膜厚の90%以下であること
を特徴とする請求項1から請求項3のいずれか1項に記載の樹脂フィルム。 - 前記樹脂フィルムの膜厚は、30μm~90μmであること
を特徴とする請求項1から請求項3のいずれか1項に記載の樹脂フィルム。 - 請求項1から請求項5のいずれか1項に記載の樹脂フィルムを製造する樹脂フィルムの製造方法であって、
前記エンボス部は、非接触で前記樹脂フィルムを加熱する非接触加熱部によって形成されること
を特徴とする樹脂フィルムの製造方法。 - 前記非接触加熱部は、光を照射することによって非接触で前記樹脂フィルムを加熱する光照射加熱部であること
を特徴とする請求項6に記載の樹脂フィルムの製造方法。 - 前記光照射加熱部は、レーザ光を照射することによって非接触で前記樹脂フィルムを加熱するレーザ加熱装置であること
を特徴とする請求項7に記載の樹脂フィルムの製造方法。 - 請求項1から請求項5のいずれか1項に記載の樹脂フィルムを製造する樹脂フィルムの製造方法であって、
前記凹部は、非接触で前記樹脂フィルムを加熱する非接触加熱部によって形成され、
前記凸部は、樹脂溶液を前記樹脂フィルムに吹き付けるインクジェット印刷部によって形成されること
を特徴とする樹脂フィルムの製造方法。
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Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6369624A (ja) * | 1986-07-30 | 1988-03-29 | ヘキスト セラニ−ズ コ−ポレ−シヨン | 高モジュラス熱可塑性フィルムの巻き取り用無接触節形成方法 |
JPH0691753A (ja) * | 1992-06-24 | 1994-04-05 | Eastman Kodak Co | ウェブ用のローレット装置および方法 |
JP2007119181A (ja) * | 2005-10-28 | 2007-05-17 | Toray Ind Inc | シートロールの製造方法、シートロールおよびシートロールの製造装置 |
WO2007063653A1 (ja) * | 2005-11-30 | 2007-06-07 | Konica Minolta Opto, Inc. | 光学フィルムの製造方法、及び製造装置 |
JP3134651U (ja) * | 2007-05-18 | 2007-08-23 | 共立産業株式会社 | ロール巻きフイルム |
JP2009040964A (ja) * | 2007-08-10 | 2009-02-26 | Nitto Denko Corp | フィルム及びその製造方法 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2561159B2 (ja) * | 1989-10-20 | 1996-12-04 | 富士写真フイルム株式会社 | 放射線画像読取装置 |
JP3134651B2 (ja) * | 1994-02-23 | 2001-02-13 | 凸版印刷株式会社 | 容器の口部構造並びに容器用口栓 |
JPH09124199A (ja) | 1995-10-30 | 1997-05-13 | Toray Ind Inc | フイルムの巻取方法および装置 |
JP2003167314A (ja) * | 2001-12-04 | 2003-06-13 | Fuji Photo Film Co Ltd | フィルム |
-
2009
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Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6369624A (ja) * | 1986-07-30 | 1988-03-29 | ヘキスト セラニ−ズ コ−ポレ−シヨン | 高モジュラス熱可塑性フィルムの巻き取り用無接触節形成方法 |
JPH0691753A (ja) * | 1992-06-24 | 1994-04-05 | Eastman Kodak Co | ウェブ用のローレット装置および方法 |
JP2007119181A (ja) * | 2005-10-28 | 2007-05-17 | Toray Ind Inc | シートロールの製造方法、シートロールおよびシートロールの製造装置 |
WO2007063653A1 (ja) * | 2005-11-30 | 2007-06-07 | Konica Minolta Opto, Inc. | 光学フィルムの製造方法、及び製造装置 |
JP3134651U (ja) * | 2007-05-18 | 2007-08-23 | 共立産業株式会社 | ロール巻きフイルム |
JP2009040964A (ja) * | 2007-08-10 | 2009-02-26 | Nitto Denko Corp | フィルム及びその製造方法 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI813251B (zh) * | 2021-05-28 | 2023-08-21 | 日商東洋鋼鈑股份有限公司 | 薄膜捲繞體及薄膜捲繞體之製造方法 |
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