CN107304008A - The carrying method and device of resin film, the manufacture method of stacked film and device - Google Patents

The carrying method and device of resin film, the manufacture method of stacked film and device Download PDF

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Publication number
CN107304008A
CN107304008A CN201710251072.7A CN201710251072A CN107304008A CN 107304008 A CN107304008 A CN 107304008A CN 201710251072 A CN201710251072 A CN 201710251072A CN 107304008 A CN107304008 A CN 107304008A
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CN
China
Prior art keywords
resin film
film
roller
width
resin
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.)
Granted
Application number
CN201710251072.7A
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Chinese (zh)
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CN107304008B (en
Inventor
石上佳照
住田幸司
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Sumitomo Chemical Co Ltd
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Sumitomo Chemical Co Ltd
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Publication of CN107304008A publication Critical patent/CN107304008A/en
Application granted granted Critical
Publication of CN107304008B publication Critical patent/CN107304008B/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H37/00—Article or web delivery apparatus incorporating devices for performing specified auxiliary operations
    • B65H37/04—Article or web delivery apparatus incorporating devices for performing specified auxiliary operations for securing together articles or webs, e.g. by adhesive, stitching or stapling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H20/00—Advancing webs
    • B65H20/02—Advancing webs by friction roller
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/0007—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding involving treatment or provisions in order to avoid deformation or air inclusion, e.g. to improve surface quality
    • B32B37/0015—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding involving treatment or provisions in order to avoid deformation or air inclusion, e.g. to improve surface quality to avoid warp or curl
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/0046—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by constructional aspects of the apparatus
    • B32B37/0053—Constructional details of laminating machines comprising rollers; Constructional features of the rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/44—Moving, forwarding, guiding material
    • B65H2301/443—Moving, forwarding, guiding material by acting on surface of handled material
    • B65H2301/4431—Moving, forwarding, guiding material by acting on surface of handled material by means with operating surfaces contacting opposite faces of material
    • B65H2301/44318—Moving, forwarding, guiding material by acting on surface of handled material by means with operating surfaces contacting opposite faces of material between rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/50—Auxiliary process performed during handling process
    • B65H2301/51—Modifying a characteristic of handled material
    • B65H2301/516—Securing handled material to another material
    • B65H2301/5161—Binding processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/11—Dimensional aspect of article or web
    • B65H2701/113—Size
    • B65H2701/1133—Size of webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/17—Nature of material
    • B65H2701/175—Plastic
    • B65H2701/1752—Polymer film

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Quality & Reliability (AREA)
  • Laminated Bodies (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Liquid Crystal (AREA)
  • Collation Of Sheets And Webs (AREA)
  • Advancing Webs (AREA)
  • Polarising Elements (AREA)

Abstract

The present invention provides the manufacture device of carrying method, the manufacture method of stacked film, the conveying device of resin film and the stacked film of the resin film for the fold that can suppress resin film.The carrying method of resin film includes the process for being clamped in the state of the first resin film (6) and the second resin film (8) coincide with one another by the first roller (1) and the second roller (2) and conveying the first resin film (6) and the second resin film (8), first roller (1) is contacted with the first resin film (6), second roller (2) is contacted with the second resin film (8), the width (W1a) of the contact area (1a) contacted with the first resin film (6) on the surface of the first roller (1) is narrower than at least one party in the width (W6) of the first resin film (6) and the width (W8) of the second resin film (8), the first resin film (6) and the second resin film (8) is set to enter from the first roller (1) side between the first roller (1) and the second roller (2).

Description

The carrying method and device of resin film, the manufacture method of stacked film and device
Technical field
The present invention relates to the carrying method of resin film, be directed to the manufacture method of stacked film, the conveying device of resin film with And the manufacture device of stacked film.
Background technology
For example, in the image display device using optical display devices such as liquid crystal display cells, using optical compensation films The various optical films such as (phase retardation film), polaroid protective film, antireflection film.
In the manufacture of such optical film, for example as described in Patent Document 1 as, pass through thermoplastic resin squeeze Pressing formation makes the resin film of bar-shape.Moreover, also resin film is extended along width (transverse direction) sometimes.By this Extend laterally, desired optical characteristics is assigned to resin film or toughness is assigned.Specifically, while by the heat of bar-shape Plastic resin film is conveyed continuously along length direction, holds the both ends of resin film with holder respectively on one side.Then, pass through The distance expanded between holder extends resin film along width.Moreover, resin film after by extension and other Process etc. of resin film (such as diaphragm) stacking and complete stacked film (stacked optical film).
Citation
Patent document
Patent document 1：Japanese Unexamined Patent Publication 2010-36414 publications
Invent problem to be solved
In extending laterally, the both ends of the resin film that holder is held with the thermoplastic resin film before extension substantially Identical thickness is remained.On the other hand, the part between both ends is thinning because of extension.Therefore, two of the resin film after extension End is processed and is cut off by cutting, removed, and the width of resin film is adjusted to Rack.It is adjusted to prolonging for Rack Film is stretched generally after batching in rolls as launch.
As noted previously, as there is thickness difference between the both ends of stretched PTFE film and central portion, therefore before cutting processing Conveying during fold is easily produced on stretched PTFE film.If producing fold near the both ends of stretched PTFE film before cutting processing, Then easily produced in cutting bad.In addition, being mixed into finished product sometimes by cutting bad caused diaphragm (powder).Moreover, prolonging The reason for stretching the uniformity for the optical characteristics that the fold of film also turns into infringement optical film.Especially, in resin film by poly- methyl-prop In the case that more crisp and splintery thermoplastic resin makes as e pioic acid methyl ester (PMMA), polystyrene (PS) etc., by In the reason in the preceding fold produced of cutting processing, not only easily produce by cutting being mixed into for bad caused diaphragm, also exist The situation that stretched PTFE film is broken.
The fold of such resin film only might not be caused by extending laterally above.For example in the extruding of thermoplastic resin In shaping, the resin film discharged from the outlet (lip) of extrusion die is influenceed by inside contract (the neck in) when discharging, therefore The central portion of the width of resin film easily becomes greater in thickness than the ends.That is, in the extrusion molding of resin, the both ends of resin film Easily become thicker than the central portion of resin film.The example is not limited to, it is various in the conveying of resin film or the manufacture of stacked film , it is necessary to the technology suppressed to the fold of resin film caused by the thickness difference as resin film in process.
The content of the invention
The present invention be in view of problem that above-mentioned conventional art has and make, its object is to there is provided can suppress The carrying method of the resin film of the fold of resin film, the manufacture method of stacked film, the conveying device of resin film and stacked film Manufacture device.
Scheme for solving problem
The carrying method of the resin film of an aspect of of the present present invention include by the first roller and the second roller the first resin film with The process that second resin film clamps in the state of coinciding with one another and conveys first resin film and second resin film, the One roller is contacted with the first resin film, and the second roller is contacted with the second resin film, and the surface of the first roller is contacted with the first resin film The width of contact area is narrower than at least one party in the width of the first resin film and the width of the second resin film, makes the first resin Film and the second resin film enter between the first roller and the second roller from the first roller side.
" width of contact area " of first roller refers to first on the direction vertical with the conveying direction of the first resin film The width of the contact area of roller." width of contact area " of first roller can rename as making parallel with the rotation axis of the first roller The width of the contact area of the first roller on direction." width of contact area " of first roller can also rename as making and bar-shape The first resin film the vertical direction of long side direction on the first roller contact area width.The conveying side of first resin film To can rename as make the first resin film long side direction.The conveying direction of first resin film can rename as making the length of the first resin film Edge direction.
" width of the first resin film " refers to the first resin film on the direction vertical with the conveying direction of the first resin film Width." width of the first resin film " can rename as making the first resin film on the direction parallel with the rotation axis of the first roller Width." width of the first resin film " can also rename as making the side vertical with the long side direction of the first resin film of bar-shape The width of the first upward resin film.
" width of the second resin film " refers to the second resin film on the direction vertical with the conveying direction of the second resin film Width." width of the second resin film " can rename as making the second resin film on the direction parallel with the rotation axis of the second roller Width.
" width of the second resin film " can also rename as making vertical with the long side direction of the second resin film of bar-shape The width of the second resin film on direction.The conveying direction of second resin film can rename as making the long side direction of the second resin film.
In the carrying method of resin film in one aspect of the invention, Ke Yishi, the first resin film enter the first roller with At the time of before between second roller, in the both ends of the first resin film on the direction vertical with the conveying direction of the first resin film At least one end than the first resin film be located at both ends between central portion it is thick.
" both ends of the first resin film " refer to the first resin on the direction vertical with the conveying direction of the first resin film The both ends of film." both ends of the first resin film " can rename as making first on the direction parallel with the rotation axis of the first roller The both ends of resin film." both ends of the first resin film " can also rename as making the long side side with the first resin film of bar-shape To the both ends of the first resin film on vertical direction.
In the carrying method of resin film in one aspect of the invention, Ke Yishi, the second resin film enter the first roller with At the time of before between second roller, in the both ends of the second resin film on the direction vertical with the conveying direction of the second resin film At least one end than the second resin film be located at both ends between central portion it is thick.
" both ends of the second resin film " refer to the second resin on the direction vertical with the conveying direction of the second resin film The both ends of film." both ends of the second resin film " can rename as making second on the direction parallel with the rotation axis of the second roller The both ends of resin film." both ends of the second resin film " can also rename as making the long side side with the second resin film of bar-shape To the both ends of the second resin film on vertical direction.
In the carrying method of resin film in one aspect of the invention, the width of the contact area of the first roller can be than second The narrow width of resin film, can be such that the surface of the first resin film is integrally contacted with the surface of the first roller.
The manufacture method of the stacked film of an aspect of of the present present invention is that manufacture is laminated with the first resin film and the second resin film The method of stacked film, the manufacture method of the stacked film is characterised by, including conveying operation, in the conveying operation, by One roller and the second roller clamp in the state of the first resin film and the second resin film coincide with one another and convey first resin Film and second resin film, in conveying operation, the first roller is contacted with the first resin film, and the second roller connects with the second resin film Touch, width of the width than the first resin film of the contact area contacted with the first resin film on the surface of the first roller and the second tree At least one party in the width of adipose membrane is narrow, in conveying operation, the first resin film and the second resin film is entered from the first roller side Enter between the first roller and the second roller.
In the manufacture method of stacked film in one aspect of the invention, Ke Yishi, the first resin film enter the first roller with At the time of before between second roller, in the both ends of the first resin film on the direction vertical with the conveying direction of the first resin film At least one end than the first resin film be located at both ends between central portion it is thick.
In the manufacture method of stacked film in one aspect of the invention, Ke Yishi, the second resin film enter the first roller with At the time of before between second roller, in the both ends of the second resin film on the direction vertical with the conveying direction of the second resin film At least one end than the second resin film be located at both ends between central portion it is thick.
In the manufacture method of stacked film in one aspect of the invention, the width of the contact area of the first roller can be than second The narrow width of resin film, can be such that the surface of the first resin film is integrally contacted with the surface of the first roller.
In the conveying operation of the manufacture method of stacked film in one aspect of the invention, Ke Yishi makes adhesive or bonding Agent is between the first resin film and the second resin film, by clamping the first resin film and second by the first roller and the second roller Resin film, the first resin film is fitted with the second resin film.
In the manufacture method of stacked film in one aspect of the invention, Ke Yishi, the first resin film and the second resin film In at least one party be the film for carrying cohesive.
The conveying device of the resin film of an aspect of of the present present invention possesses the first roller and the second roller, first roller and institute State the second roller clamped in the state of the first resin film and the second resin film coincide with one another and convey first resin film and Second resin film, the first roller is contacted with the first resin film, and the second roller is contacted with the second resin film, the surface of the first roller with First resin film contact contact area width than in the width of the first resin film and the width of the second resin film at least One side is narrow, and the conveying device of the resin film is configured to, and the first resin film and the second resin film is entered from the first roller side Between one roller and the second roller.
The manufacture device of the stacked film of an aspect of of the present present invention is that manufacture is laminated with the first resin film and the second resin film The device of stacked film, wherein, the manufacture device of the stacked film possesses the conveying device of above-mentioned resin film.
The manufacture device of the stacked film of an aspect of of the present present invention can be also equipped with apparatus for coating, and the apparatus for coating is by adhesive Or adhesive is coated on the surface of the resin film of direction second of the first resin film and the resin film of direction first of the second resin film Surface at least any surface.
Invention effect
According to the present invention, there is provided the manufacturer of the carrying method of the resin film for the fold that can suppress resin film, stacked film The manufacture device of method, the conveying device of resin film and stacked film.
Brief description of the drawings
Fig. 1 is the conveying device and the schematic diagram of carrying method of the resin film of the first embodiment of the present invention, is shown The entering angle θ 1 of first resin film is the situation at obtuse angle.
Fig. 2 is conveying device shown in Fig. 1 and the variation of carrying method, shows the entering angle θ 1 of the first resin film For the situation of acute angle.
Fig. 3 is the schematic diagram in the section of conveying device shown in Fig. 1, the first resin film and the second resin film, is shown Section including the rotation axis of rotation axis comprising the first roller and the second roller.
Fig. 4 is the schematical amplification in the section of the second resin film (stretched PTFE film) before the conveying operation of first embodiment Figure.
Fig. 5 is the conveying device of the resin film of second embodiment of the present invention, the first resin film and the second resin film Section schematic diagram.
Fig. 6 is the schematical amplification in the section of the first resin film (stretched PTFE film) before the conveying operation of second embodiment Figure.
Fig. 7 is the conveying device of the resin film of third embodiment of the present invention, the first resin film and the second resin film Section schematic diagram.
Fig. 8 is the variation in the section shown in Fig. 7, shows that the table of the first roller is integrally close on the surface of the first resin film The situation in face (contact area).
Fig. 9 is the conveying device of the resin film of comparative example 1 and the schematic diagram of carrying method.
Figure 10 is the conveying device of the resin film of comparative example 2 and the schematic diagram of carrying method.
Description of reference numerals：
1 ... first roller, the rollers of 1A ... first (crowned roll), the contact area of the rollers of 1a ... first, 2 ... second rollers, 4 ... stackings Film, 6 ... first resin films (diaphragm of first embodiment, second embodiment extend laterally film), 8 ... second resin films (the extending laterally film, the diaphragm of second embodiment of first embodiment), the central portion of the resin films of 8a ... second, 8b ... The both ends of two resin films, the conveying device of 100 ... resin films, the width of the contact area of the rollers of W1a ... first, the trees of W6 ... first Width, the width of the resin films of W8 ... second of adipose membrane.
Embodiment
Hereinafter, it is explained with reference to the present invention preferred embodiment.In the accompanying drawings, to equal inscape mark The equal reference of note.The present invention is not limited to following embodiments.X, Y and Z shown in each figure refer to orthogonal Three reference axis.Direction shown in each reference axis is common in all of the figs.
(first embodiment)
The first embodiment of the present invention is related to the manufacture method and system for the stacked film for being laminated with diaphragm and stretched PTFE film Make device.In addition, first embodiment is related to protection of the carrying method and conveying device of film and stretched PTFE film.Implement first In mode, the first resin film is diaphragm.But, as described later, the first resin film may not be diaphragm.Implement first In mode, the second resin film is thermoplastic stretched PTFE film.Stretched PTFE film for example refers to by implementing Longitudinal extending and extending laterally In either one or both and have been assigned the resin film of the desired characteristic such as optical characteristics or toughness.The concrete example of stretched PTFE film E.g. phase retardation film, polarizer or polaroid protective film.But, as described later, the second resin film can also not have thermoplastic Property, it may not be stretched PTFE film.Hereinafter, layer will be denoted as comprising the diaphragm directly or indirectly overlapped and the layered product of stretched PTFE film Folded film.First resin film can be the monofilm of monolayer constructions or the multilayer film of multi-ply construction.In addition, the second resin Film can be the monofilm of monolayer constructions or the multilayer film of multi-ply construction.First resin film and the second resin film can be with It is monofilm, can also is multilayer film.Can also be that the first resin film is monofilm and the second resin film is multilayer film. Can be that the first resin film is multilayer film and the second resin film is monofilm.
The thermoplastic resin for constituting stretched PTFE film is the thermoplastic resin with translucency, preferably optically transparent thermoplastic Property resin.Thermoplastic resin for example can be chain polyolefin-based resins, cyclic polyolefin hydrocarbon system resin (such as ENB system tree Fat), the polyolefin-based resins such as polyethylene-based resin or polypropylene-based resin.Thermoplastic resin can also be poly terephthalic acid The polyester based resins such as glycol ester, PEN or Poly-L-lactide.Thermoplastic resin can also be methyl-prop E pioic acid methyl ester system resin etc. (methyl) acrylic resin.Thermoplastic resin can also be cellulosic triacetate or cellulose two The cellulose-based resins such as acetic acid esters.Thermoplastic resin can also be polycarbonate-based resin, polyvinyl alcohol resin, poly- acetic acid second Alkene ester system resin, polyarylate system resin, polystyrene resin, polyether sulfone system resin, polysulfones system resin, polyamide series resin, Or polyimides system resins.Thermoplastic resin can also be the mixture or copolymer of above-mentioned resin.Thermoplastic resin can root Additive is also included according to needs.Additive for example can be antioxidant, ultraviolet absorption material, antistatic additive, lubrication prescription, into Core agent, antifoggant or antiblocking agent.For example, in the case where making polarizer as stretched PTFE film, thermoplastic resin can also It is polyvinyl alcohol resin.
Constitute diaphragm resin can be polyethylene-based resin, polypropylene-based resin, polyester based resin (for example gather to benzene Naphthalate).The surface facing with stretched PTFE film that can also be in diaphragm is formed with adhesive layer.
Extrusion molding process of the stretched PTFE film for example Jing Guo following explanation, Longitudinal extending process and extend laterally process to make Make.Can through after by Longitudinal extending process and extending laterally process to make stretched PTFE film, can also be by laterally prolong Stretch and make stretched PTFE film by Longitudinal extending process after process.Alternatively, it is also possible to pass through after by extrusion molding process Process is extended laterally to make stretched PTFE film.Hereinafter, illustrate to carry out the situation for extending laterally process after Longitudinal extending process.
In extrusion process, outlet (lip) of the thermoplastic resin after melting from the front end for being arranged at extruder will be heated It is membranaceous to be continuously extruded from shape.Make the formed body pass through multiple chill rolls to be cooled down, thus, it is possible to obtain long strip The squeeze film of shape.Squeeze film directly can continuously be conveyed to Longitudinal extending device.Or, it can also be batched by squeeze film After web-like, the squeeze film of web-like is extracted out and conveys it to Longitudinal extending device.Squeeze film is by along its long side direction Conveying.
Longitudinal extending device for example possesses at least two niprolls of separate configuration.
Niproll includes a pair of rolls, is while clamping resin film between a pair of rolls and carrying out pressurization while conveying resin film Device.In Longitudinal extending process, two niprolls that squeeze film possesses by Longitudinal extending device.So that squeeze film is most The circular velocity of niproll just passed through than followed by the slow mode of circular velocity of niproll be adjusted.Utilize the peripheral speed The difference of degree, squeeze film is extended along its long side direction (conveying direction) and turns into Longitudinal extending film.In Longitudinal extending process In, baking oven etc. can be configured between two niprolls and is come while carrying out heating to squeeze film while extending squeeze film.Also may be used To be preheated before Longitudinal extending process to squeeze film.
Implement to extend laterally after Longitudinal extending.Hereinafter, as extending laterally one of process, tentering method is illustrated.Draw Device is extended laterally used in width method and for example possesses the two holders row arranged along the both ends of Longitudinal extending film.That is, Longitudinal extending film is configured between two holder row.Each holder row include multiple holders.That is, along Longitudinal extending film Both ends are arranged with multiple holders.The both ends of Longitudinal extending film are held by each holder.In process is extended laterally, by two The Longitudinal extending film that end has been held by multiple holders is conveyed along its long side direction.During conveying, prolong longitudinally The interval for expanding a pair of relative holders on the width (transverse direction) of film is stretched, thus Longitudinal extending film turns into and extended laterally Film.It can also enter to exercise the operation (so-called relaxation) of the interval somewhat constriction after the interval of a pair of holders is expanded.So Afterwards, the both ends for extending laterally film are discharged from holder.Relieving extends laterally a pair of holders after film and returns to upstream side, again Hold the both ends of Longitudinal extending film.That is, the holding at the both ends of Longitudinal extending film, Longitudinal extending is repeated in multiple holders The release for extending laterally and extending laterally film of film.Using the tentering method of the above, Longitudinal extending film is by continuously along width Direction (transverse direction) extends, and can obtain extending laterally film.Can be also in process is extended laterally while being carried out to Longitudinal extending film Heating is while extend Longitudinal extending film.In process is extended laterally or it can also extend laterally that process is laggard to be about to extend laterally Film heats and makes to extend laterally the stabilized heat fixation of film.Stretched PTFE film after extending laterally by guided by multiple guide reels and by Conveyed to conveying device described later.
The thickness at the both ends for the Longitudinal extending film that holder is held even in after extending laterally also with extend laterally before Thickness it is roughly the same.On the other hand, part (central portion) between the both ends of Longitudinal extending film is easily because laterally prolonging Stretch and thinning.That is, as shown in figure 4, the both ends 8b for extending laterally film 8 easily become than extend laterally film 8 be located at both ends Central portion 8a between 8b is thick.Extending laterally the central portion 8a of film 8 thickness T8a easily becomes uniform.Therefore, film is extended laterally Cutting processing of the 8 both ends 8b after and be cut off, remove, extending laterally the width W8 of film 8, to be adjusted to regulation wide Spend (such as width W8a).However, the carrying method by using conventional guide reel or niproll will extend laterally film to In the case of cutting processing unit (plant) conveying, the stretched PTFE film during conveying easily produces fold.Especially in film 8 is extended laterally, hold It is also easy to produce from both ends 8b towards central portion 8a fold, from central portion 8a towards both ends 8b fold.
The fold is caused by the difference for extending laterally the both ends 8b of film 8 thickness T8b and central portion 8a thickness T8a 's.According to conveying device and carrying method described further below, film 8 (second is extended laterally during conveying can be suppressed Resin film) on fold.But, the fold extended laterally on film during conveying may not be only as caused by thickness difference.Even in Extend laterally in the case of there's almost no thickness difference in film 8, according to the conveying device and carrying method of first embodiment, Also the fold extended laterally on film 8 during conveying can be suppressed.
The manufacture device of the stacked film of first embodiment as shown in Figures 1 to 3, possesses to diaphragm 6 and extended laterally The conveying device 100 that film 8 is conveyed.Conveying device 100 possesses the first roller 1 and the second roller 2.The rotation axis of first roller 1 A1 is parallel with the rotation axis A2 of the second roller 2.The manufacture method of the stacked film of first embodiment is including the use of conveying device 100 Conveying operation.In conveying operation, by the first roller 1 and the second roller 2 are by diaphragm 6 and extend laterally film 8 to weigh each other The state of conjunction is clamped and conveyed.Diaphragm 6 is also similarly formed as the banding of strip with extending laterally film 8.Diaphragm 6 for example by from Blank volume is extracted out and supplied to conveying device 100.
First roller 1 and the second roller 2 are the niprolls for applying line pressure to the surface of resin film.That is, diaphragm 6 and horizontal stroke It is held between the first roller 1 and the second roller 2, is pressurizeed by the first roller 1 and the second roller 2 in course of conveying to stretched PTFE film 8.Example Such as, can be controlled by controlling the speed of niproll positioned at the upstream side of niproll diaphragm 6 and to extend laterally film 8 each From tension force.
First roller 1 for example can be the substantially uniform plain-barreled roll of diameter.I.e. as shown in figure 3, including the rotary shaft of the first roller 1 In section including line A1, the surface of the first roller 1 can be substantially linear.Second roller 2 can also be plain-barreled roll.I.e. as shown in figure 3, In the section including the rotation axis A2 comprising the second roller 2, the surface of the second roller 2 can be substantially linear.
The contact area 1a contacted with diaphragm 6 (the first resin film) on the surface of the first roller 1 width W1a ratios and second The width W8a for the central portion 8a for extending laterally film 8 (the second resin film) that roller 2 is contacted is narrow.In connecing that the progress of the first roller 1 is contacted In the case that the width W8a for the central portion 8a that the width W1a ratios for touching region 1a extend laterally film 8 (the second resin film) is narrow, first The contact area 1a of roller 1 is not easy pressure to the both ends 8b (portions thicker than central portion 8a for extending laterally film 8 (the second resin film) Point), the first roller 1 easily only applies tension force to the central portion 8a for extending laterally film 8 (the second resin film).By only to extending laterally The central portion 8a of film 8 (the second resin film) applies tension force, so as to form central portion 8a in uniform thickness and be not easy to produce fold. Extend laterally the width W8 of film 8 (the second resin film) and the contact area 1a of the first roller 1 width W1a difference (W8-W1a) for example For 10~300mm or so.
In conveying operation, make diaphragm 6 and extend laterally film 8 from the side of the first roller 1 enter the first roller 1 and the second roller 2 Between.That is, the side of the first roller 1 for making diaphragm 6 and extending laterally film 8 from narrow width of the width than extending laterally film 8 enters roller Between.As a result, the contact area 1a of the first roller 1 easily applies equal via diaphragm 6 to the central portion 8a for extending laterally film 8 Even line pressure.
As previously discussed, in the first embodiment, the first roller 1 can be via diaphragm 6 to extending laterally in film 8 Centre portion 8a applies full and uniform line pressure.By the uniform line pressure, so as to the central portion 8a to extending laterally film 8 Apply uniform tension force.As a result, the fold extended laterally on film 8 during conveying is inhibited.Especially, easily suppress Extend laterally film 8 from both ends 8b towards central portion 8a fold, from central portion 8a towards both ends 8b fold, easily suppression Make the fold as caused by the central portion 8a and both ends 8b that extend laterally film 8 thickness difference.If make diaphragm 6 and transverse direction In the case that one or both in stretched PTFE film 8 enters between the first roller 1 and the second roller 2 from the side of the second roller 2, first roller 1 connects Touch region 1a (the thick part of the first roller 1) to be difficult to make uniform line pressure involve the central portion 8a for extending laterally film 8, it is difficult to press down Fold processed.
As shown in Fig. 1 and 2, cut in vertical with the rotation axis A1 of the first roller 1 and the second roller 2 rotation axis A2 On face (ZX faces), the first datum line L1 be with by rotation axis A1 and rotation axis A2 link line segment La it is vertical and with protection The intersecting line segment of film 6 (the first resin film).The entering angle θ 1 of diaphragm 6 (the first resin film) is defined as (the first tree of diaphragm 6 Adipose membrane) and angle formed by the first datum line L1.In addition, on the section vertical with rotation axis A1 and rotation axis A2, the Two datum line L2 are vertical with line segment La and with extending laterally the line segment that film 8 (the second resin film) intersects.Extend laterally film 8 ( One resin film) entering angle θ 2 be defined as extending laterally film 8 (the second resin film) and angle formed by the second datum line L2.
As shown in figure 1, the entering angle θ 1 of diaphragm 6 can be obtuse angle.As shown in Fig. 2 the entering angle θ 1 of diaphragm 6 also may be used To be acute angle.The entering angle e1 of diaphragm 6 is, for example, 10~170 °.In order to increase the pleat as caused by the shape of the first roller 1 Wrinkle inhibition, entering angle θ 1 is preferably 30~120 °.As shown in figure 1, the entering angle θ 2 for extending laterally film 8 can be acute angle. The entering angle θ 2 for extending laterally film 8 can also be obtuse angle.For example, the entering angle θ 2 for extending laterally film 8 can be 10~170 ° i.e. Can.Entering angle θ 1 and θ 2 within the above range in the case of, easily suppress to extend laterally the fold of film 8.
At the time of extending laterally before film 8 enters between the first roller 1 and the second roller 2, as shown in figure 4, with extending laterally The both ends 8b for extending laterally film 8 on direction vertical the conveying direction D8 of film 8 can be located at two ends than extend laterally film 8 Central portion 8a between portion 8b is thick.That is, the both ends 8b for extending laterally film 8 on width (short side direction or Y direction) Can be thicker than extending laterally the central portion 8a being located between the 8b of both ends of film 8.Extended laterally even in extending laterally in process The both ends 8b of film 8 thickness T8b become thickness T8a than central portion 8a it is big and it is easy produce towards central portion 8a fold or From central portion 8a towards both ends 8b fold, in conveying operation, the contact area 1a of the first roller 1 also can be via diaphragm 6 pairs extend laterally film 8 the uniformly applied tension force of central portion 8a, therefore, it is possible to suppress the fold for extending laterally film 8.
The surface of diaphragm 6 (the first resin film) can also be made integrally to be close to the surface of the first roller 1 as shown in Figure 3 (the contact area 1a of the first roller 1).It is close to the diaphragm 6 (first on the surface (the contact area 1a of the first roller 1) of the first roller 1 Resin film) surface area it is bigger, then the contact area 1a of the first roller 1 is easier makes line via diaphragm 6 (the first resin film) Pressure involves the central portion 8a for extending laterally film 8 (the second resin film).As a result, can suppress to extend laterally the direction of film 8 Central portion 8a fold, from central portion 8a towards both ends 8b fold.
Can contact area 1as of the width W6 than the first roller 1 of diaphragm 6 (the first resin film) as shown in Figure 3 it is wide Spend W1a narrow.In the narrow situations of contact area 1as of the width W6 than the first roller 1 of diaphragm 6 (the first resin film) width W1a Under, the contact area 1a of the first roller 1 easily to diaphragm 6 and extends laterally the application line pressure of film 8.But, diaphragm 6 ( One resin film) width W6 can also be wider than the contact area 1a of the first roller 1 width W1a.It can protect as shown in Figure 3 The width W8 that the width W6 ratios of film 6 (the first resin film) extend laterally film 8 (the second resin film) is narrow.But, diaphragm 6 (first Resin film) width W6 can also be wider than extending laterally the width W8 of film 8 (the second resin film).Can be horizontal as shown in Figure 3 Width W8 to stretched PTFE film 8 (the second resin film) is narrower than the width W2 of the second roller 2.
Can as shown in Figure 3, in conveying operation, the central portion of the first roller 1, diaphragm 6 (the first resin film) The central portion of central portion, the central portion for extending laterally film 8 (the second resin film) and the second roller 2 on same plane (ZX faces) or Alignd on same straight line (Z axis).
The surface of first roller 1 can be the high rigid body of rigidity.For example, the surface of the first roller 1 can be iron or stainless steel Etc. (SUS304) metal, can also carry out the surface treatment such as chromium plating process, Nickel Plating Treatment to the surface of the first roller 1.First roller 1 Surface can also be elastomer.For example, the surface of the first roller 1 can be nitrile rubber (NBR), polyurethane rubber, silicone rubber, Or the rubber such as ethylene propylene diene rubber (EPDM).This point of high shape from easy assign, the surface of the first roller 1 is preferably elasticity Body.
The surface of second roller 2 can be the high rigid body of rigidity.For example, the surface of the second roller 2 can also be iron or stainless steel Etc. (SUS304) metal, can also carry out the surface treatment such as chromium plating process, Nickel Plating Treatment to the surface of the second roller 2.Second roller 2 Surface can also be elastomer.For example, the surface of the second roller 2 can be nitrile rubber (NBR), polyurethane rubber, silicone rubber, Or the rubber such as ethylene propylene diene rubber (EPDM).
One or both in first roller 1 and the second roller 2 can be by direct or indirect by power source (such as motor) Ground drives and rotated.
From that can take into account fold inhibition and uniform laminate pressure this point, the preferably surface of the first roller is elasticity The surface of body and the second roller is rigid body.
Diaphragm 6 and extend laterally film 8 as stacked film 4 by between the first roller 1 and the second roller 2 extract out.Stacking Film 4 is guided from multiple guide reels and conveyed to cutting processing unit (plant).In the cutting manufacturing procedure using cutting processing unit (plant), The both ends 8b for extending laterally film 8 is cut off (cutting) and is removed.Extend laterally the both ends 8b of film 8 either one is overlapping In the case of having diaphragm 6, a part for the diaphragm 6 overlapping with the both ends 8b for extending laterally film 8 is also turned off (cutting) And be removed.
Can also be laminated or fit on the stacked film 4 after cutting processing other resin films.For example, can be by relative to guarantor Other diaphragms (the second resin film) for cuticula 6 are laminated or fit in stretched PTFE film and sandwich stretched PTFE film by a pair of diaphragms. In addition to the second resin film, other more than one resin films can also be also laminated or fitted in stacked film 4.
At the time of extending laterally before film 8 enters between the first roller 1 and the second roller 2, the central portion 8a of film 8 is extended laterally Thickness T8a for example can be 3~100 μm, 4~80 μm or 5~40 μm.In conventional conveying operation, exist and extend laterally The central portion 8a of film 8 thickness T8a is smaller, extends laterally the easier tendency for producing fold of film 8.In other words, film is extended laterally 8 central portion 8a is thinner, then more can be difficult on the width for extending laterally film 8 equably additional because fold etc. influences Power, the tension force for extending laterally film 8 is partly uprised, and is extended laterally film 8 and is easily broken off.Therefore, it is difficult in conventional conveying operation To suppress the thin fold extended laterally on film 8 by tension force.However, according to first embodiment, even in extending laterally In the case that the central portion 8a of film 8 thickness T8a is less than 40 μm, it can also suppress the pleat for extending laterally film 8 during conveying Wrinkle, suppresses to extend laterally the fracture of film 8.
The thickness of diaphragm 6 is, for example, 10~100 μm or so.
The width W8 for extending laterally film 8 for example can be 300~6000mm.The width W8 for extending laterally film 8 is (especially horizontal To the central portion 8a of stretched PTFE film 8 width W8a) it is wider, then extend laterally the easier generation fold of film 8 during conveying.However, According to first embodiment, in the case that the width W8 for extending laterally film 8 is wide, it can also suppress the transverse direction during conveying The fold of stretched PTFE film 8.The width W6 of diaphragm 6 for example can be 300~6000mm.
Diaphragm 6 and the transporting velocity for extending laterally film 8 for example can be 2~100m/ point.
The contact area 1a of first roller 1 diameter for example can be 60~400mm.The diameter of second roller 2 for example can be 60~400mm.
The stacked film obtained in first embodiment more than for example can fit in liquid as stacked optical film The optical display device such as crystal display element or organic EL display element.Stacked optical film for example can be stacked polarization plates.
(second embodiment)
Illustrate second embodiment of the present invention.In this second embodiment, the situation also with first embodiment is same The fold on stretched PTFE film during can suppressing to convey.Hereinafter, (the first embodiment party of item specific to second embodiment is illustrated The difference of formula and second embodiment).In following unaccounted item, second embodiment is total to first embodiment It is logical.
In the first embodiment, the first resin film 6 contacted with the first roller 1 is diaphragm, the contacted with the second roller 2 Two resin films 8 are stretched PTFE film.On the other hand, in this second embodiment, the first resin film 6 contacted with the first roller 1 is extension Film, the second resin film 8 contacted with the second roller 2 is diaphragm.So, except stretched PTFE film it is opposite with the upper and lower relation of diaphragm this Beyond point, second embodiment is identical with first embodiment.
The manufacture method of the stacked film of second embodiment also possesses the conveying operation using conveying device 100.
As shown in figs.5 and 6, the contact area 1a contacted with the first resin film 6 (stretched PTFE film) on the surface of the first roller 1 Width W1a it is narrower than the width W6 of the first resin film 6 (stretched PTFE film).Compare first in the contact area 1a of the first roller 1 width W1a In the case that the width W6 of resin film 6 (stretched PTFE film) is narrow, the contact area 1a of the first roller 1 is not easy the first resin film of pressure 6 and (prolonged Stretch film) both ends 6b (part thicker than central portion 6a), the center of the first roller 1 easily only to the first resin film 6 (stretched PTFE film) Portion 6a applies tension force.
By only applying tension force to the central portion 6a of the first resin film 6 (stretched PTFE film), so as to suppress the first resin film 6 (stretched PTFE film) towards central portion 6a fold, from central portion 6a towards both ends 6b fold.First resin film 6 (stretched PTFE film) Width W6 and the contact area 1a width W1a difference (W6-W1a) of the first roller 1 for example can be for 10~300mm or so.
In conveying operation, make the first resin film 6 (stretched PTFE film) and the second resin film 8 (diaphragm) from the side of the first roller 1 Into between the first roller 1 and the second roller 2.That is, make the first resin film 6 and the second resin film 8 from width than the first resin film 6 The side of the first roller 1 of narrow width enters between roller.As a result, the first 1 central portion 6a and second easily to the first resin film 6 of roller Resin film 8 applies line pressure.
As previously discussed, in this second embodiment, the first roller 1 can be to the central portion of the first resin film 6 (stretched PTFE film) 6a applies full and uniform line pressure.By the line pressure, applied so as to the central portion 6a to the first resin film 6 (stretched PTFE film) Plus uniform tension force, fold can be suppressed.Especially, the fold on the both ends of the first resin film 6 (stretched PTFE film) is easily suppressed.
At the time of before the first resin film 6 (stretched PTFE film) enters between the first roller 1 and the second roller 2, such as Fig. 5 and Fig. 6 It is shown, the two ends of the first resin film 6 (stretched PTFE film) on the direction vertical with the conveying direction D6 of the first resin film 6 (stretched PTFE film) Portion 6b can be thicker than the central portion 6a being located between the 6b of both ends of the first resin film 6 (stretched PTFE film).That is, width (short side Direction or Y direction) on the first resin film 6 (stretched PTFE film) both ends 6b can than the first resin film 6 (stretched PTFE film) position Central portion 6a between the 6b of both ends is thick.Even in the both ends 6b for extending laterally the first resin film 6 (stretched PTFE film) in process Thickness T6b become that thickness T6a than central portion 6a is big and the easy fold produced towards central portion 6a, in conveying operation, The contact area 1a of first roller 1 also can apply uniform tension force, therefore energy to the central portion 6a of the first resin film 6 (stretched PTFE film) Enough suppress the generation of fold.
Can be with width of the width W8 than the first resin film 6 (stretched PTFE film) of the second resin film 8 (diaphragm) as shown in Figure 5 Spend W6 narrow.But, the width W8 of the second resin film 8 (diaphragm) can also be wider than the width W6 of the first resin film 6 (stretched PTFE film). Can be narrow with contact area 1as of the width W8 than the first roller 1 of the second resin film 8 (diaphragm) as shown in Figure 5 width W1a. But, the width W8 of the second resin film 8 (diaphragm) can also be wider than the contact area 1a of the first roller 1 width W1a.Can be as The width W6 of the first resin film 6 (stretched PTFE film) is narrower than the width W2 of the second roller 2 as shown in Figure 5.Second resin film 8 (diaphragm) Width W8 can be narrower than the width W2 of the second roller 2.
(the 3rd embodiment)
Illustrate third embodiment of the present invention.In the third embodiment, it is also real with first embodiment and second The fold on the first resin film 6 or the second resin film 8 can equally be suppressed by applying the situation of mode.Hereinafter, the 3rd embodiment party is illustrated Item specific to formula.Hereinafter, for unaccounted item, the 3rd embodiment and first embodiment are common.In addition, with Under, for unaccounted item, the 3rd embodiment and second embodiment are common.
As shown in fig. 7, the first roller 1A of the 3rd embodiment is crowned roll (crown roll).That is, the first roller is being included It is smooth curve positioned at the first roller 1A central contact area 1a surface in section including 1A rotation axis A1. Also, the first roller 1A diameter (thickness) is reduced with the centre from the first roller 1A towards the first roller 1A both ends 1b. On the other hand, the second roller 2 of the 3rd embodiment for example can be plain-barreled roll.But, the second actual roller 2 for example can be because of deadweight And bent in the way of the contact area 1a along the first roller 1A.
In the conveying operation of the 3rd embodiment, also make the first resin film 6 and the second resin film 8 from the first roller 1A sides Into between the first roller 1A and the second roller 2.That is, the first resin film 6 and the second resin film 8 is made to enter from crowned roll side between roller.
First roller 1A contact area 1a (the thick part of crowned roll) and plain-barreled roll are in a ratio of convex, therefore easily with first The surface contact of resin film 6.Therefore, central portion 6as of the first roller 1A (crowned roll) compared with plain-barreled roll easily to the first resin film 6 Or second resin film 8 the uniformly applied tension force of central portion 8a, it is not easy to produce the pleat of the first resin film 6 or the second resin film 8 Wrinkle.That is, according to the 3rd embodiment using crowned roll, with the first embodiment and second embodiment phase using plain-barreled roll Than easily suppressing the fold of the first resin film 6 or the second resin film 8.If make the first resin film 6 and the second resin film 8 One or both from the side of the second roller 2 enter between the first roller 1A and the second roller 2 in the case of, the first roller 1A contact area 1a (the thick part of crowned roll) is difficult to make line pressure equably involve each resin film, it is difficult to suppress fold.
First roller 1A (crowned roll) middle a large amount for example can be 0.05~5mm.Middle a large amount refers to the first roller 1A contact The difference of the maxima and minima of diameter in the 1a of region.In other words, middle a large amount refers in the first roller 1A contact area 1a The difference of the diameter of the diameter in centre portion and the first roller 1A contact area 1a end.For the first roller 1A middle a large amount, from The deflection of first roller 1 subtract value obtained by the deflection of the second roller 2 be on the occasion of and in the case that the value is bigger, the first roller 1A is got over Easily to diaphragm 6 and extend laterally film 8 central portion 8a apply line pressure, easier suppression fold.If described on the occasion of mistake Yu great, then the end of film width is not clamped, therefore fold inhibition is possible to diminish.Therefore, middle a large amount is preferably located In subtracted from the deflection of the first roller 1 value obtained by the deflection of second roller 2 be on the occasion of and film width end be clamped The scope of this degree.
The part on the surface of the first resin film 6 can be made to be close to the first roller 1A surface (first as shown in Figure 7 Roller 1A contact area 1a), the surface of the first resin film 6 can also be made integrally to be close to the first roller 1A's as shown in Figure 8 Surface (the first roller 1A contact area 1a).It is close to first tree on the first roller 1A surface (the first roller 1A contact area 1a) The surface area of adipose membrane 6 is bigger, then the first roller 1A contact area 1a is easier makes line pressure involve via the first resin film 6 The central portion 8a of two resin films 8.The result is that, it is not easy to produce the second resin film 8 towards central portion 8a fold, from center Folds of the portion 8a towards both ends 8b.Even if in addition, the second resin film 8 positioned at the upstream side of conveying device 100 generates pleat Wrinkle, the fold of the second resin film 8 is also easily pressed expansion because of the first roller 1A (crowned roll) shape.
(another embodiment)
It is explained above first embodiment, second embodiment and the 3rd embodiment of the present invention, but the present invention It is not limited to above-mentioned embodiment.
The fold of resin film might not be only caused by extending laterally for squeeze film.For example in the extruding of thermoplastic resin In forming process, film is configured to from for example cooled roller cooling and solidifying of molten resin that the outlet (lip) of extrusion die is discharged During shape, the end of squeeze film easily becomes thicker than the central portion of squeeze film under the influence of (neck in) is inside contracted.That is, laterally prolong The both ends of squeeze film before stretching easily become thicker than the central portion of squeeze film.As suppression as caused by the extrusion molding process The means of the fold of squeeze film, the present invention is also useful.The example is not limited to, conveying or the system of stacked film in resin film Under the various occasions made, it can suppress the fold of the resin film as caused by the thickness difference of resin film by the present invention. In the manufacture of stacked film, the carrying method of the resin film of the multiple present invention can also be implemented.
The manufacture device of the stacked film of first embodiment, second embodiment and the 3rd embodiment is except possessing tree Beyond the conveying device of adipose membrane, apparatus for coating can be also equipped with.Implement in first embodiment, second embodiment and the 3rd In the manufacture method of the stacked film of mode, can before conveying operation, using apparatus for coating the first resin film direction It is coated with the face of either one in the surface of the resin film of direction first of the surface of two resin films or the second resin film gluing Agent (Japanese is " then drug ") or adhesive (Japanese is " adhesion drug ").In ensuing conveying operation, adhesive can be made Or adhesive between the first resin film and the second resin film and by the first roller and the second roller clamp the first resin film and Second resin film.I.e. in conveying operation, can fit the first resin film and the second resin film via adhesive or adhesive. That is, the conveying device of resin film can also have the function of being fitted each other to resin film concurrently.
At least one party in first resin film and the second resin film can also be the film for carrying cohesive.For example can also Being that diaphragm has carries cohesive.For example, in the presence of the diaphragm being made up of polyethylene-based resin or polypropylene-based resin.From Adhesive surface with cohesive film for example can be the surface of the resin film of direction second of the first resin film.Or carry cohesive film Adhesive surface can also be the second resin film the resin film of direction first surface.It can also be the direction second of the first resin film The surface both sides of the resin film of direction first of the surface of resin film and the second resin film are adhesive surface.In the first resin film and In the case that at least one party in second resin film is the film for carrying cohesive, in conveying operation, without using adhesive or viscous Mixture just can fit the first resin film with the second resin film.
For example, in the above-described 3rd embodiment, the second roller 2 also can be set into crowned roll.In first embodiment, In two embodiments and the 3rd embodiment, the width of the contact area of the first roller can than the first resin film width and This two side of the width of second resin film is narrow., can be with first embodiment, second embodiment and the 3rd embodiment It is that the both ends of the second resin film are thicker than the central portion being located between both ends of the second resin film, also, the first resin film Both ends are thicker than the central portion being located between both ends of the first resin film.
First resin film is not limited to diaphragm or stretched PTFE film.Second resin film is also not limited to diaphragm or stretched PTFE film. First resin film or the second resin film for example can be from by reflection type polarization film, antiglare film, surface antireflection film, reflectance coating, The one kind selected in the group that Transflective film, phase retardation film and compensation film for angular field of view are constituted.Stacked film can be possessed From by polarizer, polaroid protective film, reflection type polarization film, antiglare film, surface antireflection film, reflectance coating, Transflective film, At least one stacked optical film above selected in the group that phase retardation film and compensation film for angular field of view are constituted.
[embodiment]
Hereinafter, present disclosure is described in more detail using embodiment and comparative example, but the present invention is not limited In following embodiment.
(embodiment 1)
In embodiment 1, following Longitudinal extending process is implemented successively, extend laterally process and conveying operation.
In Longitudinal extending process, while heating the resin film of bar-shape under conditions of 120 DEG C while by resin film Extend along its length direction (conveying direction).As resin film, use by PMMA resins (methyl methacrylate/propylene Sour methyl terpolymer (weight compares 94/6), 108 DEG C of vitrification point) formed film.The width W of resin film before Longitudinal extending0For 1000mm.The thickness T of resin film before Longitudinal extending0For the value shown in table 1 below.Longitudinal extending multiplying power has been adjusted to following tables Value shown in 1.The thickness of central portion on the width (short side direction) of resin film (Longitudinal extending film) after Longitudinal extending T1For the value shown in table 1 below.
After extending laterally process after Longitudinal extending process, tentering method is employed.In tentering method, tool has been used What two holders that the standby both ends along Longitudinal extending film are arranged were arranged extends laterally device.Two holder row include respectively Multiple holders.In process is extended laterally, longitudinal direction is held by the multiple holders arranged along the both ends of Longitudinal extending film The both ends of stretched PTFE film.While the Longitudinal extending film held under conditions of 120 DEG C to each holder is heated, while expanding The interval of big a pair of holders relative on the width of Longitudinal extending film, thus along the width of Longitudinal extending film (transverse direction) is extended.Film at the same temperature after heating extension is while carried out the interval constriction of holder on one side 5mm relaxation.The step of by the above, so as to obtain extending laterally film (the second resin film).
Extend laterally multiplying power and be adjusted to value shown in table 1 below.As shown in figure 4, the resulting width for extending laterally film 8 The central portion 8a that both ends 8b ratios on degree direction (short side direction) extend laterally film 8 is thick.That is, the two ends of film 8 are being extended laterally At portion 8b, remain with the thickness T with Longitudinal extending film1The part of roughly the same thickness.Extend laterally the central portion of film 8 8a thickness T8a is the value shown in table 1 below, and generally uniform.
This is extended laterally into film from multiple guide reels to convey to conveying device.As shown in Fig. 1 and Fig. 8, embodiment 1 is made Conveying device possesses the first roller 1A arranged in parallel and the second roller 2 and the motor being driven to their rotation.The One roller 1A and the second roller 2 are niproll, and the first roller 1A is the crowned roll that surface is made up of rubber.First roller 1A's (crowned roll) The maximum of contact area 1a diameter is 120mm.First roller 1A middle a large amount is 400 μm.
First roller 1A contact area 1a width W1a is 1500mm.Second roller 2 is the plain-barreled roll being made up of rigid metal. A diameter of 210mm of second roller 2.The width W2 of second roller 2 is 2100mm.In conveying operation, as shown in figure 1, making diaphragm 6 And film 8 is extended laterally from the first roller 1A sides between the first roller 1A and the second roller 2, they are conveyed with the state of coincidence. As diaphragm 6 (the first resin film), film (the eastern beautiful film processing strain formula of the bar-shape formed by polyethylene-based resin has been used Commercial firm's system " Toretec ").The thickness of diaphragm 6 is 30 μm.The width W6 of diaphragm 6 is 1450mm.The width W6 of diaphragm 6 Width W1a than the first roller 1A contact area 1a is narrow.The width W8a for extending laterally the central portion 8a of film 8 is wider than diaphragm 6 The width for spending W6 is wide.The width W8a that first roller 1A contact area 1a width W1a ratios extend laterally the central portion 8a of film 8 is narrow. The width W8 that the width W2 ratios of the contact area of second roller 2 extend laterally film 8 is wide.
To the diaphragm 6 extracted out with the state of coincidence between the first roller 1A and the second roller 2 and extend laterally film 8 and carry out Observation.After the conveying operation of embodiment 1, in the absence of the fold extended laterally on film 8.
(embodiment 2)
In the Longitudinal extending process of embodiment 2, the thickness T of the resin film before Longitudinal extending0Shown in table 1 below Value.In the Longitudinal extending process of embodiment 2, Longitudinal extending multiplying power has been adjusted to the value shown in table 1 below.In embodiment 2 In the case of, the thickness T of the central portion on the width of Longitudinal extending film1For the value shown in table 1 below.
Process is extended laterally in embodiment 2, is extended laterally multiplying power and has been adjusted to value shown in table 1 below.In addition, Extending laterally in process for embodiment 2, has been carried out the interval constriction 10mm of holder relaxation.In the case of embodiment 2, The thickness T8a of central portion 8a on the resulting width for extending laterally film 8 is the value shown in table 1 below.In embodiment 2 In the case of, the width W8a for extending laterally the central portion 8a of film 8 is the value shown in table 1 below.
In the case of embodiment 2, the width W6 of diaphragm 6 is 1450mm, and the width W6 of diaphragm 6 is than the first roller 1A's Contact area 1a width W1a is narrow.
In addition to item more than, implemented in the same manner as the situation of embodiment 1 embodiment 2 Longitudinal extending process, Extend laterally process and conveying operation.After the conveying operation of embodiment 2, also in the absence of the fold extended laterally on film.
(embodiment 3)
In the Longitudinal extending process of embodiment 3, Longitudinal extending multiplying power has been adjusted to the value shown in table 1 below.Implementing In the case of example 3, the thickness T of the central portion on the width of Longitudinal extending film1For the value shown in table 1 below.
Process is extended laterally in embodiment 3, is extended laterally multiplying power and has been adjusted to value shown in table 1 below.In addition, Extending laterally in process for embodiment 3, has been carried out the interval constriction 10mm of holder relaxation.In the case of example 3, The thickness T8a of central portion 8a on the resulting width for extending laterally film is the value shown in table 1 below.In embodiment 3 In the case of, the width W8a for extending laterally the central portion 8a of film is the value shown in table 1 below.
In addition to item more than, implemented in the same manner as the situation of embodiment 2 embodiment 3 Longitudinal extending process, Extend laterally process and conveying operation.After the conveying operation of embodiment 3, also in the absence of the fold extended laterally on film.
(comparative example 1)
In the Longitudinal extending process of comparative example 1, Longitudinal extending multiplying power has been adjusted to the value shown in table 1 below.Comparing In the case of example 1, the thickness T of the central portion on the width of Longitudinal extending film1For the value shown in table 1 below.
Process is extended laterally in comparative example 1, is extended laterally multiplying power and has been adjusted to value shown in table 1 below.In addition, Extending laterally in process for comparative example 1, has been carried out the interval constriction 16mm of holder relaxation.In the case of comparative example 1, The thickness T6a of central portion 6a on the resulting width for extending laterally film is the value shown in table 1 below.In comparative example 1 In the case of, the central portion 6a of stretched PTFE film width W6a is the value shown in table 1 below.
As shown in figure 9, in the conveying operation of comparative example 1, as the first roller, having been used instead of crowned roll by rubber structure Into plain-barreled roll 10.A diameter of 160mm of the plain-barreled roll 10 of comparative example 1.In the conveying operation of comparative example 1, the first resin film 6 (prolongs Stretch film) to the roller 2 of plain-barreled roll 10 and second enter entering angle be zero.
In addition, in the conveying operation of comparative example 1, making the second resin film 8 (diaphragm) enter plain-barreled roll 10 from the side of the second roller 2 Between the second roller 2.As shown in figure 9, the upper and lower relation of the stretched PTFE film and diaphragm in comparative example 1 and the situation of embodiment 1 Conversely.
In the case of comparative example 1, the width W8 of the second resin film 8 (diaphragm) is 1900mm.In the situation of comparative example 1 Under, the width W6 of the first resin film 6 (stretched PTFE film) is narrower than the width W8 of the second resin film 8 (diaphragm).In the situation of comparative example 1 Under, the width W6 of the first resin film 6 (stretched PTFE film) is narrower than the width of the first roller (plain-barreled roll 10) and the width W2 of the second roller 2. In the case of comparative example 1, the width W8 of the second resin film 8 (diaphragm) is also than the width and the second roller of the first roller (plain-barreled roll 10) 2 width W2 is narrow.
In addition to item more than, implemented in the same manner as the situation of embodiment 1 comparative example 1 Longitudinal extending process, Extend laterally process and conveying operation.After the conveying operation of comparative example 1, extend laterally film 8 and generate fold.
(comparative example 2)
In the Longitudinal extending process of comparative example 2, Longitudinal extending multiplying power has been adjusted to the value shown in table 1 below.Comparing In the case of example 2, the thickness T of the central portion on the width of Longitudinal extending film1For the value shown in table 1 below.
Process is extended laterally in comparative example 2, does not enter to be about to the relaxation of the interval constriction of holder.Extend laterally again Rate has been adjusted to the value shown in table 1 below.In the case of comparative example 2, on the resulting width for extending laterally film 8 Central portion 8a thickness T8a is the value shown in table 1 below.In the case of comparative example 2, the central portion 8a of stretched PTFE film width W8a is the value shown in table 1 below.
The width W1 of the first roller 1A (crowned roll) entirety used in the conveying operation of comparative example 2 is 2100mm.Than The width W1a of contact area 1a compared with the first roller 1A (crowned roll) of example 2 is 1591mm.First roller 1A of comparative example 2 middle height Measure as 1200 μm.As shown in Figure 10, in the conveying operation of comparative example 2, make to extend laterally film 8 and enter first from the side of the second roller 2 Between roller 1A and the second roller 2.
In the case of comparative example 2, the width W6 of diaphragm 6 is 1800mm.That is, in the case of comparative example 2, diaphragm The width W8 that 6 width W6 ratios extend laterally film 8 is wide.In the case of comparative example 2, the width W6 of diaphragm 6 is than the first roller 1A Contact area 1a width W1a it is wide.In the case of comparative example 2, the first roller 1A contact area 1a width W1a is than laterally The width W8 of stretched PTFE film 8 is narrow.
In addition to item more than, implemented in the same manner as the situation of embodiment 1 comparative example 2 Longitudinal extending process, Extend laterally process and conveying operation.After the conveying operation of comparative example 2, pleat is not present in the central portion for extending laterally film 8 Wrinkle, but generate fold at the both ends for extending laterally film 8.
(comparative example 3)
Process is extended laterally in comparative example 3, has been carried out the interval constriction 5mm of holder relaxation.Resulting The thickness T8a for extending laterally the central portion 8a on the width of film 8 is the value shown in table 1 below.In the situation of comparative example 3 Under, the width W8a for extending laterally the central portion 8a of film 8 is the value shown in table 1 below.
In the conveying operation of comparative example 3, make to extend laterally film 8 from the side of the second roller 2 enter the first roller 1A and the second roller 2 it Between.
In addition to item more than, implemented in the same manner as the situation of embodiment 1 comparative example 3 Longitudinal extending process, Extend laterally process and conveying operation.After the conveying operation of comparative example 3, fold is somewhat generated extending laterally film 8.
[table 1]
Industrial applicability
It is defeated in the manufacturing process of stacked film (such as stacked polarization plates) according to the carrying method of the resin film of the present invention When sending stretched PTFE film (such as polarizer membrane), the fold on stretched PTFE film can be suppressed.

Claims (13)

1. a kind of carrying method of resin film, it is characterised in that
Including being clamped and being conveyed in the state of the first resin film coincides with one another with the second resin film by the first roller and the second roller The process of first resin film and second resin film,
First roller is contacted with first resin film,
Second roller is contacted with second resin film,
The width of the contact area contacted with first resin film on the surface of first roller is than first resin film At least one party in the width of width and second resin film is narrow, makes first resin film and second resin film Enter from the first roller side between first roller and second roller.
2. the carrying method of resin film according to claim 1, wherein,
At the time of before first resin film enters between first roller and second roller, with first resin film The vertical direction of conveying direction on first resin film both ends at least one end than first resin film The central portion being located between the both ends it is thick.
3. the carrying method of resin film according to claim 1 or 2, wherein,
At the time of before second resin film enters between first roller and second roller, with second resin film The vertical direction of conveying direction on second resin film both ends at least one end than second resin film The central portion being located between the both ends it is thick.
4. the carrying method of resin film according to any one of claim 1 to 3, wherein,
The width of the contact area of first roller than second resin film narrow width,
The surface of first resin film is set integrally to be contacted with the surface of first roller.
5. a kind of manufacture method of stacked film, it is the side for the stacked film that manufacture is laminated with the first resin film and the second resin film Method,
The manufacture method of the stacked film is characterised by,
Including conveying operation, in the conveying operation, by the first roller and the second roller in first resin film and described second Resin film clamps in the state of coinciding with one another and conveys first resin film and second resin film,
In the conveying operation, first roller is contacted with first resin film, second roller and second resin Film is contacted,
The width of the contact area contacted with first resin film on the surface of first roller is than first resin film At least one party in the width of width and second resin film is narrow, in the conveying operation, makes first resin film And second resin film enters between first roller and second roller from the first roller side.
6. the manufacture method of stacked film according to claim 5, wherein,
At the time of before first resin film enters between first roller and second roller, with first resin film The vertical direction of conveying direction on first resin film both ends at least one end than first resin film The central portion being located between the both ends it is thick.
7. the manufacture method of the stacked film according to claim 5 or 6, wherein,
At the time of before second resin film enters between first roller and second roller, with second resin film The vertical direction of conveying direction on second resin film both ends at least one end than second resin film The central portion being located between the both ends it is thick.
8. the manufacture method of the stacked film according to any one of claim 5 to 7, wherein,
The width of the contact area of first roller than second resin film narrow width,
The surface of first resin film is set integrally to be contacted with the surface of first roller.
9. the manufacture method of the stacked film according to any one of claim 5 to 8, wherein,
In the conveying operation,
Make adhesive or adhesive between first resin film and second resin film,
By clamping first resin film and second resin film by first roller and second roller, by institute The first resin film is stated to fit with second resin film.
10. the manufacture method of the stacked film according to any one of claim 5 to 8, wherein,
At least one party in first resin film and second resin film is the film for carrying cohesive.
11. a kind of conveying device of resin film, it is characterised in that
Possess the first roller and the second roller, first roller and second roller in the first resin film and the second resin film each other Clamped in the state of coincidence and convey first resin film and second resin film,
First roller is contacted with first resin film,
Second roller is contacted with second resin film,
The width of the contact area contacted with first resin film on the surface of first roller is than first resin film At least one party in the width of width and second resin film is narrow, and the conveying device of the resin film is configured to, and makes institute The first resin film and second resin film is stated from the first roller side to enter between first roller and second roller.
12. a kind of manufacture device of stacked film, it is the dress for the stacked film that manufacture is laminated with the first resin film and the second resin film Put,
The manufacture device of the stacked film is characterised by,
Possesses the conveying device of the resin film described in claim 11.
13. the manufacture device of stacked film according to claim 12, wherein,
The manufacture device of the stacked film is also equipped with apparatus for coating, and adhesive or adhesive are coated on described by the apparatus for coating The table of the direction on surface and second resin film first resin film of direction second resin film of one resin film At least any surface in face.
CN201710251072.7A 2016-04-21 2017-04-17 Method and apparatus for conveying resin film, method and apparatus for manufacturing laminated film Active CN107304008B (en)

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CN107304008B (en) 2020-11-13

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