CN106256525B - The manufacturing method of resin film - Google Patents
The manufacturing method of resin film Download PDFInfo
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- CN106256525B CN106256525B CN201610414417.1A CN201610414417A CN106256525B CN 106256525 B CN106256525 B CN 106256525B CN 201610414417 A CN201610414417 A CN 201610414417A CN 106256525 B CN106256525 B CN 106256525B
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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
- B29C55/045—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique in a direction which is not parallel or transverse to the direction of feed, e.g. oblique
-
- 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
-
- 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
- B29C37/0092—Drying moulded articles or half products, e.g. preforms, during or after moulding or cooling
-
- 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
- B29C41/34—Component parts, details or accessories; Auxiliary operations
- B29C41/42—Removing articles from moulds, cores or other substrates
- B29C41/44—Articles of indefinite length
-
- 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
- B29C55/005—Shaping by stretching, e.g. drawing through a die; Apparatus therefor characterised by the choice of materials
-
- 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
-
- 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
- B29C55/08—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique transverse to the direction of feed
- B29C55/085—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique transverse to the direction of feed in several stretching steps
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L1/00—Compositions of cellulose, modified cellulose or cellulose derivatives
- C08L1/08—Cellulose derivatives
- C08L1/26—Cellulose ethers
-
- 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
- B29K2001/00—Use of cellulose, modified cellulose or cellulose derivatives, e.g. viscose, as moulding material
- B29K2001/08—Cellulose derivatives
-
- 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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
The present invention provides a kind of manufacturing method of resin film, its stretching process for having the supply step of the film of supply strip and stretching the film while conveying the film with multiple grips of the both side ends for the width direction for having held the film, wherein, the thickness d in the holding region of the film held with the grips is 0.012~0.045mm, and, in such a way that distance L between the position farthest from the front end with the part of the film being clamped by the grips of the front end of the width direction of the film meets following formula (1) film is held with the grips.2.5mm≤L≤(1200×d‑10.5)mm(1).
Description
Technical field
The present invention relates to a kind of manufacturing methods of resin film.
Background technology
Resin film is used for various fields, such as liquid crystal display in view of its chemical characteristic, mechanical property and electrical characteristics etc.
Device etc..Specifically, the image display area in liquid crystal display device is used as configured with various resin films for protecting polarization
The optical films such as the transparent protective film of the polarizer of piece.As such resin film, such as cellulose ester membrane has been widely used etc.
The excellent resin film of the transparency.
Material resin cellulose esters system resin is dissolved in solvent and formed such as can be used by the resin films such as cellulose ester membrane
Resin solution (rubber cement) manufacture.As the manufacturing method for the resin film for having used such rubber cement, specifically, for example can be with
Enumerate solution curtain coating film method etc..It is following method that solution curtain coating, which is film-made method,：It is cast rubber cement on mobile supporting mass and is formed
Casting films (net), make it dry to strippable degree, are removed from the supporting mass in membrane form, by the film one of stripping
While with conveying roller conveying drying on one side or stretching, the resin film of strip is manufactured.
Method as the method for such manufacture resin film, such as stretched film during manufacturing can enumerate patent text
Offer the manufacturing method described in 1.
Record a kind of manufacturing method of net in patent document 1, wherein detect the edge of net on the move based on drawing
The absolute position of the net width direction of the tenter clip in the gripping point of width machine clamp and the upstream for detecting the gripping point
In the net edge net width direction absolute position, by the net width direction of the tenter clip that is detected
The absolute position of the net width direction of absolute position and the edge of the net finds out the tenter clip in the gripping point
Net holding amount, by be preset with the net holding amount defined net hold quantitative change it is equal in a manner of control the drawing on one side
The position of width machine clamp is on one side by the tenter clip along net width direction stretching nets.According to patent document 1, it discloses
The holding position of tenter clip can accurately be controlled as specified holding amount.
In addition, in the method for manufacture resin film, if stretched film during manufacturing, when stretching, film generates albefaction sometimes.
Existing technical literature
Patent document
Patent document 1：Japanese Unexamined Patent Publication 8-12144 bulletins
Invention content
The present invention is completed in view of the situation, it is intended that provide one kind suppressed sufficiently stretch when
The manufacturing method of the resin film of the albefaction generated on film.
An aspect of of the present present invention is a kind of manufacturing method of resin film, which is characterized in that has the film of supply strip
It supply step and is drawn while conveying the film with multiple grips of the both side ends for the width direction for having held the film
Stretch the stretching process of the film, wherein the film with the grips hold holding region thickness d be 0.012~
0.045mm, also, with the part of the front end of the width direction of the film and the film being clamped by the grips from before described
The mode that the distance L between farthest position meets following formula (1) is held to hold the film with the grips.
2.5mm≤L≤(1200×d-10.5)mm(1)
Above-mentioned and other purpose of the present invention, feature and advantage are carried out bright by detailed record below and appended attached drawing
Really.
Description of the drawings
Fig. 1 is the manufacturing device for indicating to have used the resin film of the manufacturing method of the resin film of embodiments of the present invention
The skeleton diagram of one example of basic composition.
Fig. 2 has been used by expression to be had in the manufacturing device of the resin film of the manufacturing method of the resin film in present embodiment
The skeleton diagram of one example of standby stretching device.
Fig. 3 is the sectional view from the grips (fixture) in terms of the hatching III-III in stretching device shown in Fig. 2.
Fig. 4 has been used by expression to be had in the manufacturing device of the resin film of the manufacturing method of the resin film in present embodiment
The skeleton diagram of one example of others of standby stretching device.
Specific implementation mode
According to the research of the present inventor, if the manufacturing method by the net described in patent document 1 manufactures cellulose acetate
The resin films such as ester film, the then albefaction generated on the periphery of the grips such as tenter clip when inhibiting with being unable to fully sometimes to stretch
Deng.
In addition, being recorded in patent document 1 by the polyester film of 13 μm of film thickness by the holding amount set in a manner of 14mm
It is stretched as an example, but is not recorded and holding amount is adjusted according to the film thickness of film.The system of net described in patent document 1
Although the method for making can be controlled accurately as preset holding amount, the film thickness that can not correspond to film is adjusted to holding appropriate
Amount.
Albefaction, the raised part of mist degree are not suitable as optical film use as described above, therefore, produce the tree of albefaction
Adipose membrane will cut away the part of albefaction and by remaining part for optical film.As a result, as the part of albefaction becomes larger, cut away
Part increase, can not correspond to wide cut or manufacture efficiency reduces.
According to these situations, it is desirable that a kind of system for the resin film suppressed sufficiently the albefaction generated on film when stretching
Make method.
According to the research of the present inventor, find to produce on grips periphery when carrying out grips stretched film using multiple fixtures etc.
Raw albefaction is easy to generate when being stretched being changed without grips for a long time.That is, finding for grips to be changed to new handle
After gripping member, even if not generating the albefaction, after some period of time, such as albefaction is also easy tod produce after 1 year after replacement.It pushes away
It surveys this and depends on following situations.That is, the stretching of film usually carries out under high temperature environment.And make for a long time under such hot environment
Grips is deformed and wears.Think the reason of deformation etc. is albefaction.Specifically, because of the deformation of grips,
Offset is generated between the stress that grips applies film when stretching and the stress assumed originally, it is believed that the offset becomes albefaction
Reason.
As a result, in the manufacturing method of resin film, when carrying out having used the stretching of grips, grips is regularly replaced.
Therefore, because the albefaction generated using the grips of long-time service will not become big problem.However, the inventors of the present invention find with
The filming development for resin film, the case where generating time of albefaction and increasingly shorten.The present inventor, which is directed to, as a result, makes generation should
The time of albefaction is elongated to be studied.
In the past, the holding position of grips by stretch when film will not be detached from from grips in a manner of hold deeper.
But present inventor is studied for the holding position, as a result, it has been found that the time for generating albefaction is different due to holding position.
That is, finding that holding position is shallower then very effective in terms of inhibiting to generate albefaction.Additionally, it was found that it can inhibit for film
The generation of albefaction.
According to the above situation, condition when the inventors of the present invention are conceived to the stretching in the manufacturing method of resin film, so that
Expect the present invention as described below.
Hereinafter, embodiments of the present invention will be described, but the present invention is not limited to these embodiments.
The manufacturing method of the resin film of embodiments of the present invention has the supply step of the film of supply strip and uses handle
The multiple grips for having held the both side ends of the width direction of above-mentioned film stretch the stretching of above-mentioned film while conveying above-mentioned film
Process.Moreover, the thickness d in the holding region of above-mentioned film held with above-mentioned grips is 0.012~0.045mm (12~45 μ
m).That is, the manufacturing method of above-mentioned resin film is to be used as above-mentioned of the use of film thickness when stretching by the manufacture of above-mentioned stretching process
The resin film that the thickness in the holding region that gripping member is held is 12~45 μm.
It is above-mentioned film as the holding position for holding above-mentioned film with above-mentioned grips in addition, in above-mentioned stretching process
Distance L expires between the position farthest from above-mentioned front end with the part of above-mentioned film being clamped by above-mentioned grips of the front end of width direction
The position of sufficient following formula (1).It is from the width direction center of the above-mentioned film for the part of above-mentioned film being clamped by above-mentioned grips
The end of portion side meets the position of following formula (1) to the distance L of the front end of the width direction of above-mentioned film.Above-mentioned stretching process at
Above-mentioned film is held for such above-mentioned grips of the mode for holding position.
2.5mm≤L≤(1200×d-10.5)mm(1)
The thinner thickness in the holding region held by grips in the film in manufacture, is 0.012~0.045mm, therefore,
Relatively thin resin film finally can be obtained.Even if as manufacture when relatively thin resin film, passing through and forming as described above hold
The time change in the generation albefaction of grips periphery is arrived in position as position is held after can making replacement grips.That is, even if making
The grips that the long period uses in stretching process can also be adequately suppressed the albefaction generated on grips periphery.Relatively
In this, if above-mentioned distance L is too short, there is film when stretching and be easy the tendency to fall off from grips.If in addition, in order to inhibit film
It is detached from from grips and excessively extends above-mentioned distance L, then existing to be unable to give full play makes to generate until the grips periphery of film
The tendency of time elongated such effect of albefaction.Therefore, as the holding position of grips, by meet above-mentioned formula (1)
Mode grips holding film and make its stretching, the albefaction that generates in film when stretching can be adequately suppressed.
In addition, the thickness d in the holding region of above-mentioned film held by above-mentioned grips is 12~45 μm as described above, preferably
It is 16~40 μm, more preferably 18~32 μm.The thickness d institute as above in the holding region held by grips in the film in manufacture
It states relatively thin, therefore, relatively thin resin film finally can be obtained.In addition, in manufacture as above relatively thin resin film, exists and be easy in handle
Gripping member periphery generates the tendency of albefaction.As long as despite this, being the manufacturing method of the resin film of present embodiment, as long as having
Even if above-mentioned stretching process can also make after replacement grips then in the such relatively thin resin film of manufacture in grips
The time that periphery generates albefaction is elongated.
In addition, as the holding position for holding above-mentioned film with above-mentioned grips, be above-mentioned distance L meet above-mentioned formula (1) this
The position of sample.In addition, distance L preferably satisfies following formula (2).In this way, it can further suppress and be generated on grips periphery
Albefaction is further elongated after can making replacement grips in the time of grips periphery generation albefaction.
2.5mm≤L≤(1140×d-10.5)mm(2)
In addition, above-mentioned stretching process is with the two side ends for the width direction for having held the film supplied in above-mentioned supply step
The process that multiple grips in portion stretch above-mentioned film while conveying above-mentioned film does not have as long as being the process for meeting above-mentioned condition
It is particularly limited to.
In addition, above-mentioned supply step is not particularly limited as long as the film that can be supplied to strip.As above-mentioned supply step,
For example, as described later can be film-made the process etc. that method continuously feeds the film of strip by solution curtain coating.It is specific and
Speech, above-mentioned supply step, which is preferably provided with, is cast to the resin solution containing transparent resins on mobile supporting mass by curtain coating mould
And it forms the curtain coating process of casting films and removes above-mentioned casting films from above-mentioned supporting mass and obtain the stripping process of above-mentioned film.Only
Have such supply step, then can continuously feed the film for stretching process.Therefore, can be continuously manufactured by inhibit it is white
The resin film of the generation of change.
In addition, holding the above-mentioned distance L of the grips of the one end of above-mentioned film and holding the handle of the other end of above-mentioned film
The above-mentioned distance L of gripping member may be the same or different.Alternatively, it is also possible to according to the state of grips in a side and another party
Change above-mentioned distance.Such as above-mentioned distance can be changed according to the use used in stretching process.
The manufacturing method of the resin film of present embodiment does not have as long as having above-mentioned supply step and above-mentioned stretching process
It is particularly limited to.Specifically, for example,：In solution curtain coating film method, from supporting mass after stripping film, to being removed
Film implement above-mentioned stretching process and the method etc. that manufactures resin film.Specifically, the manufacturer of the resin film of present embodiment
Method forms stream to have the resin solution (rubber cement) containing transparent resins being cast on mobile supporting mass by curtain coating mould
The curtain coating process for prolonging film (net), the stripping process that above-mentioned casting films are removed in membrane form from above-mentioned supporting mass and to being shelled
From film implement above-mentioned stretching process based on so-called solution curtain coating be film-made method manufacturing method.In addition, as resin film
Manufacturing method, in addition to above-mentioned each process, the drying process and winding that can also enumerate the film drying for making to have removed finally obtain
Resin film and form the rolling step of roll body.In addition, above-mentioned stretching process may be to make above-mentioned film stretching and make above-mentioned film
Dry process.If such process, then makes its stretching in the process for making film dry, therefore, tree can effectively manufactured
The aspect of adipose membrane is preferred.In addition, if the process for making film stretching and film being made to dry, then in general it is easy to generate in film white
Change.However, if the stretching process of present embodiment, even if can be fully if being then the stretching carried out when as above film being made to dry
Inhibit the generation of albefaction.Therefore, the resin film for the generation for inhibiting albefaction can be effectively manufactured.
In addition, such manufacturing method for being film-made method based on solution curtain coating for example can be by as shown in Figure 1 based on molten
Manufacturing device of resin film of liquid casting film method etc. carries out.In addition, the manufacturing device as resin film, as long as carrying out above-mentioned
Each process is just not limited to device shown in FIG. 1, or the device of other compositions.In addition, film in this refers to by being cast
The casting films (net) that rubber cement on supporting mass is constituted it is dry on supporting mass and as the state that can be removed from supporting mass with
Film afterwards.
Fig. 1 is to indicate to have used the basic of the manufacturing device of the resin film of the manufacturing method of the resin film in present embodiment
The skeleton diagram of the example constituted.The manufacturing device of resin film have endless belt supporting mass 11, curtain coating mould 15, stripper roll 13,
Stretching device 21, drying device 17 and winding device 19 etc..Mould 15 is cast by the resin solution (rubber cement) containing transparent resins
14 are sprayed with ribbon and are cast on the surface of endless belt supporting mass 11.Above-mentioned endless belt supporting mass 11 can be driven by a pair of rolls 12
It supports dynamicly, forms the casting films (net) being made of the resin solution 14 being cast from curtain coating mould 15, make it dry while conveying
The dry degree until can be used above-mentioned stripper roll 13 to remove.Then, above-mentioned stripper roll 13 is removed from above-mentioned endless belt supporting mass 11
Dry to a certain degree casting films and obtain film 16.The film 16 of stripping waits defined direction by stretching device 21 in the width direction
It stretches.In addition, the film 16 stretched is further dried by drying device 17, the film F dried is passed through into volume as resin film
Winding apparatus 19 is wound into roll.
As long as rubber cement 14 can with ribbon be sprayed and is cast on the surface of endless belt supporting mass 11 by above-mentioned curtain coating mould 15
On be just not particularly limited.Above-mentioned curtain coating mould 15 supplies rubber cement from the rubber cement supply pipe for being connected to upper end.Then, which supplies
Rubber cement sprayed from above-mentioned curtain coating mould 15 to above-mentioned endless belt supporting mass 11, form net on above-mentioned endless belt supporting mass 11.
Endless belt supporting mass 11 is the endless belt of loopy moving as shown in Figure 1, such as it is minute surface preferably to use surface
Metal endless belt of loopy moving etc..As endless belt, from the aspect of the fissility of casting films, such as preferably make
With the band being made of stainless steel etc..Alternatively, it is also possible to use idler body to replace endless belt supporting mass.As the idler
Body, such as preferably using the metal roller of rotation etc. that surface is minute surface.
Then, endless belt supporting mass 11 on one side convey while that casting films (net) is formed by its surface make it is molten in rubber cement
Agent is dried.Above-mentioned drying can for example be carried out by carrying out heating to endless belt supporting mass 11 or being blown heating wind to net.
In addition, the movement speed of endless belt supporting mass 11 is not particularly limited, but it for example it is preferably 50~200m/ minutes left
It is right.In addition, the movement speed of endless belt supporting mass 11 is cast the ratio between spouting velocity of mould 15 i.e. draw ratio relative to rubber cement 14 certainly
It is not particularly limited, but is for example preferably 0.8~5.0 or so.As long as above-mentioned draw ratio is in the range, then can be stably formed
Casting films.Such as if draw ratio is excessive, exists and generates the tendency of the such phenomenon of contracting that casting films are reduced in width direction,
If it is the case, can not then form the film of wide cut.
Stripper roll 13 configures near the surface of the curtain coating rubber cement side of endless belt supporting mass 11, endless belt supporting mass 11 and stripping
It is preferably 1~100mm with a distance from roller 13.In addition, stripper roll 13 is to the drying to a certain degree on endless belt supporting mass 11
It is used when net is removed.Apply tension to the net dried using the stripper roll 13 as fulcrum to pull, by what is dried
Net is removed in the form of film 16.In addition, when from stripping film on endless belt supporting mass 11, conveying by stripping tension and later
Tension by film 16 film conveying direction (Machine Direction：The directions MD) it stretches.
As long as above-mentioned stretching device 21 is multiple grips of the both side ends for the width direction for having holding film 16 and can
The device that above-mentioned stretching process is carried out by multiple grips etc. is just not particularly limited.As above-mentioned stretching device 21, example
Can such as enumerate as shown in Figure 2 makes film 16 in direction (the Transverse Direction orthogonal with conveying direction：The side TD
To) stretch stretching device.Such stretching device is specifically as shown in Fig. 2, by will be vertical with the conveying direction of film 16
The both ends in direction (width direction) be used as the fixture 24,25 of grips and hold and increase between opposed fixture 24,25
It is stretched apart from and the directions TD.
Fig. 2 has been used by expression to be had in the manufacturing device of the resin film of the manufacturing method of the resin film in present embodiment
The skeleton diagram of one example of standby stretching device.Above-mentioned stretching device 21 has the 1st guide rail 22, the 2nd guide rail 23 and multiple folders
Tool 24,25 etc..It should be noted that Fig. 2 is skeleton diagram, the number of fixture 24,25 is compared with the number described in Fig. 2, it is however generally that
It is multiple.
Above-mentioned 1st guide rail 22 extends along the one end of above-mentioned film 16, determines the moving direction of above-mentioned fixture 24 as described later.
In addition, above-mentioned 2nd guide rail 23 extends along the other end of above-mentioned film 16, the moving direction of above-mentioned fixture 25 is determined as described later.
Above-mentioned fixture 24,25 holds the end of the width direction of above-mentioned film 16 respectively.In addition, above-mentioned fixture 24,25 is distinguished
Specified interval configuration is separated on ring chain (not shown).Then, the ring chain configured with above-mentioned fixture 24 hang on one
To sprocket wheel 26,28.In addition, the ring chain for being configured at above-mentioned fixture 25 hang on a pair of sprocket 27,29.Sprocket wheel 28,29 is by step
It rotates and drives into driving sources such as motor, the driving force for assigning ring rotation to above-mentioned each ring chain.In addition, sprocket wheel
26,27 are rotatably freely arranged, the driven rotation with the ring rotation of the ring chain based on sprocket wheel 28,29.Then, above-mentioned
The annular of each ring chain is walked around to be guided by above-mentioned 1st guide rail 22 and above-mentioned 2nd guide rail 23.As described above, being configured with above-mentioned folder
Tool 24 and above-mentioned fixture 25 ring chain by by above-mentioned 1st guide rail 22 and above-mentioned 2nd guide rail 23 guiding in the state of into
Row ring rotation, above-mentioned fixture 24,25 are led in the state of holding the end of width direction of above-mentioned film 16 respectively the above-mentioned 1st
The conveying direction of 23 upper edge film 16 of rail 22 and above-mentioned 2nd guide rail moves successively.
The moving direction of above-mentioned fixture 24,25 determines as follows.
First, above-mentioned each fixture 24,25 onlys the length along above-mentioned film 16 while the both ends of the width direction of holding film
Spend direction movement.That is, being moved in a manner of hardly changing the distance between above-mentioned fixture 24 and above-mentioned fixture 25.
Then, above-mentioned each fixture 24,25 is moved along the length direction of above-mentioned film 16, and along in the width side of above-mentioned film 16
It is moved to the direction for the spacing for gradually extending above-mentioned fixture 24 and above-mentioned fixture 25.By doing so, by above-mentioned film 16 along width
Direction stretches.At this point, angle θ formed by the length direction of film 16 and the above-mentioned fixture 24 when stretching or above-mentioned fixture 25 before stretching
1 is preferably 1~50 °.If above-mentioned angle θ 1 is too small, extensibility is lower, and there is inclining for the wide cut for being unable to fully realize resin film
To.In addition, if above-mentioned angle θ 1 is excessive, the periphery for existing that serve as the position of the holding of fixture 24,25 for grips deforms
Tendency, according to circumstances, sometimes film 16 crack.
Finally, above-mentioned each fixture 24,25 is moved in a manner of hardly changing the distance between they.That is, to keep logical
Overstretching and the mode at interval that extends move.Exist in the caudacoria 16 for discharging above-mentioned each fixture 24,25 by doing so, can inhibit
Width direction generates contraction.
In addition, when making above-mentioned film 16 stretch, usually film 16 is heated to carry out.The heating of the film 16 is not special
It limits, such as can be carried out by being blown heating wind to film, can also be heated by heating devices such as infrared rays.In addition,
The temperature of film when stretching is different also according to composition of film etc., such as preferably 100~150 DEG C.Heating in this way, can
So that film is dried.Specifically, as described above, above-mentioned stretching process is preferably the work for making above-mentioned film stretching and making above-mentioned film drying
Sequence.In this way, due to making its stretching in the process for making film dry, resin film can be effectively manufactured.In addition, if making film draw
In general the process for stretching and making film to dry, then be easy to generate albefaction in film.If the manufacture of the resin film of present embodiment
Method can be adequately suppressed the generation of albefaction if even if being then such process.Therefore, it can effectively manufacture and inhibit albefaction
Generation resin film.
As long as grips fixture 24,25 can holding film, then its structure be not particularly limited, specifically, for example
The fixture of structure as shown in Figure 3 can be enumerated.It should be noted that Fig. 3 is from cuing open in stretching device 21 shown in Fig. 2
The sectional view for the fixture 24,25 that upper thread III-III is seen.
Above-mentioned fixture 24,25 is constituted containing movable part 31 and pedestal 32 as shown in Figure 3.Above-mentioned movable part 31 rotates freely
Ground axle suspension is in above-mentioned pedestal 32.Above-mentioned fixture 24,25 by make above-mentioned movable part 31 rotate and will be upper with above-mentioned movable part 31
It states film 16 and sandwiches above-mentioned pedestal 32 to hold above-mentioned film 17.
In addition, the front end 16a for holding the width direction that position is above-mentioned film 16 and above-mentioned film 16 of above-mentioned fixture 24,25
Met the position of above-mentioned formula (1) by distance L between the position 16b farthest from above-mentioned front end 16a of the part that above-mentioned fixture 24,25 is clamped
It sets.The position 16b that the part of above-mentioned film 16 being clamped by above-mentioned fixture 24,25 is farthest from above-mentioned front end 16a is 16 quilt of above-mentioned film
The part of above-mentioned movable part 31 and the clamping of above-mentioned pedestal 32 position farthest from above-mentioned front end 16a.As above-mentioned 31 He of movable part
The part that above-mentioned pedestal 32 is contacted with above-mentioned film 16 position farthest from above-mentioned front end 16a.As long as in addition, the quilt of above-mentioned film 16
The position 16b that the part of the clamping of above-mentioned fixture 24,25 is farthest from above-mentioned front end 16a is above-mentioned position, then is not limited to Fig. 3
Shown in position.
Specifically, in figure 3, the 2nd contact surface 34 contacted with above-mentioned film 16 of above-mentioned pedestal 32 is from above-mentioned movable part
31 the 1st contact surface 33 contacted with above-mentioned film 16 extends to the width direction center side of above-mentioned film 16.At this point, above-mentioned film 16
It is and above-mentioned film 16 and above-mentioned movable part 31 by the part position 16b farthest from above-mentioned front end 16a that above-mentioned fixture 24,25 is clamped
The part of the contact position farthest from above-mentioned front end 16a.In addition, above-mentioned 1st contact surface 33 is extended to from above-mentioned 2nd contact surface 34
When the width direction center side of above-mentioned film 16, for the part that is contacted with above-mentioned film 16 and above-mentioned pedestal 32 away from above-mentioned front end 16a most
Remote position.
In addition, the thickness in the holding region of the above-mentioned film 16 held by above-mentioned fixture 24,25 held by above-mentioned fixture 24,25
D is spent preferably than above-mentioned holding region more by thickness d ' 4~28 μ of thickness of the central side region of the width direction center side of above-mentioned film 16
M is more preferably 8~22 μm thick.The albefaction that film generates when stretching, which exists, is easy inclining in the fixture periphery generation as grips
To.In addition, there are the tendencies that the film the thin more easy tos produce for such albefaction.According to these situations, by further thickening holding
The thickness in region makes it be thicker than the thickness of central side region, can further play the effect for the generation for inhibiting albefaction.In addition, even if
When manufacturing relatively thin resin film, the holding region held by thickening grips can inhibit the generation of albefaction.According to these
Situation, even if film issuable albefaction when can be adequately suppressed stretching if when manufacturing relatively thin resin film.In addition, even if
Hold the thickness d of the thickness d than central side region in region ' it is thick, if its difference is small, the effect that the difference of the thickness generates tails off.Separately
Outside, if holding thickness d of the thickness d in region relative to central side region ' it is blocked up, deposit the change near grips after the stretch
Shape bigger tendency.In addition, the thickness d in the holding region of above-mentioned film 16 is preferably 16~40 μm, more preferably 18~32 μm.Separately
Outside, the thickness d of the central side region of above-mentioned film 16 ' it is preferably 8~36 μm, more preferably 10~24 μm.
In addition, the manufacture thickness d as described above for holding region does not have than the method for the film of the thickness d ' thickness of central side region
It is particularly limited to.As long as being formed with such film in above-mentioned formation process.If for example, being film-made method by solution curtain coating
In the case of forming film, then the slit for being sprayed rubber cement along casting width direction (width direction of ejiction opening) using adjustment (is sprayed
Mouthful) gap width bolt curtain coating mould side by side, for the gap width of its slit, in the substantially extension width with central portion compared with
It is cast rubber cement in the state of the end in degree direction and forms film, this makes it possible to obtain hold the thickness d in region than central side region
The film of thickness d ' thickness.
In addition, above-mentioned stretching process is not only the case where as above stretching along the directions TD, or tilt the case where stretching.
Specifically, can enumerate：It is conveyed while holding the both side ends of width direction of above-mentioned film with multiple grips, on one side
Gripping state is maintained to change the stretching process etc. of conveying direction on one side.By as above changing conveying direction, make the above-mentioned film of holding
Multiple 3rd grips of the one end of the above-mentioned film of holding in multiple grips of the both side ends of width direction and holding are above-mentioned
The displacement distance of 4th grips of the other end of film is different.By doing so, by above-mentioned film along relative to width direction being big
Direction in 0 ° and less than 90 ° is stretched into line tilt.As above-mentioned stretching process, or it is such into line tilt stretch
Process.If such stretching process, then film along inclined direction can suitably be stretched, it, can be fully when the inclination stretches
Inhibit the generation of albefaction.
Fig. 4 has been used by expression to be had in the manufacturing device of the resin film of the manufacturing method of the resin film in present embodiment
The skeleton diagram of one example of others of standby stretching device.The film in direction is controlled by deflector roll 41 of stenter entrance side
16, film on the outside keeps the film of starting point 42-1, inside that the position of starting point 42-2 is kept to be supported by grips (fixture), uses
Tilt stretching machine 43 along the track 44-1 of the film holding meanss in outside, the film holding meanss of inside track 44-2 shown in
Inclined direction conveying stretches, and keeps the film holding end point 45-2 releases of end point 45-1, inside to hold by the film in outside,
The film 16 for tilting and having stretched is formed by the deflector roll 46 of tenter outlet side controls conveying.That is, feeding of the film 16 relative to film
Direction 51 is stretched with the angle (angle of orientation θ 2) of the draw direction 52 of film into line tilt.Side with the θ 2 more than 0 ° and less than 90 °
Formula is stretched.
Drying device 17 has multiple conveying rollers, so that film is dried when transport membrane between the roller.At this point, as shown in Figure 1, can be with
By making the circulation in the drying device 17 of heating air 18 be dried, can also use infrared ray etc. be dried or,
It can also and be dried with heating air and infrared ray., it is preferable to use heating air from the aspect of simplicity.
The film F for becoming defined residual solvent rate in drying device 17 is wound in core by winding device 19.Additionally, it is preferred that
Embossing processing is implemented to the width direction both ends of film using heat embossing mechanism before film F is wound in core.In addition, in order to
Scratch, winding relaxation that contraction after preventing because of winding generates etc., temperature when winding is preferably cooled to room temperature.The winding used
Device can be not particularly limited to use, and general used winding device can pass through constant tension method, constant-torque
The winding method such as the constant program tension control method of method, taper tension method, internal stress are wound.
In addition, the manufacturing device of resin film, which can also have the cut-out before winding resin film with winding device 19, removes striping
The disconnecting device of 16 end.End is removed by as above cutting off, being held by grips in above-mentioned stretching process can be removed
Part.At this point, the manufacturing method of the resin film if present embodiment, then can inhibit the generation albefaction of grips periphery therefore can
The part etc. deformed by grips is only cut off, the part that cut-out removes is reduced.Specifically, it is preferable that width side of the cut-out away from film
To front end 4.5cm position.By doing so, the part deformed by grips can be removed.Alternatively, it is also possible to winding
After device 19 is wound, when in order to use resin film to extract as product resin film out cut-out remove end.
In addition, the manufacturing device of resin film is no special as long as it can implement the manufacturing method of resin film of present embodiment
It limits.Specifically, the manufacturing device of resin film can not have stretching device or drying device, alternatively, it is also possible to not be point
Do not have 1 respectively, but respectively has multiple.
In addition, the manufacturing device of resin film instantiates in the scheme of above description has endless belt supporting mass as bearing
The device of body, but may be the device for having idler body.Specifically, replacing endless belt branch except having idler body
It holds other than body 11, the manufacturing device etc. of resin film same as the manufacturing device of resin film shown in FIG. 1 can also be enumerated.Separately
Outside, as idler body, for example, the rotation for implementing the stainless steel of hard chrome plating processing to surface drives rolling
Cylinder etc..
Hereinafter, being illustrated to the composition of the resin solution (rubber cement) used in present embodiment.
The resin solution (rubber cement) used in present embodiment is that transparent resins is made to be dissolved in obtained from solvent.
As long as above-mentioned transparent resins are when being configured to substrate shape by solution curtain coating film method etc. with the transparency
Resin is not particularly limited, but is preferably easy through manufactures such as solution curtain coating film methods；With other functions such as hard conating
Layer it is excellent in adhesion；Optical isotropy.In addition, it is 60% or more that the transparency, which refers to the transmitance of visible light, herein, preferably
It is 80% or more, more preferably 90% or more.
As above-mentioned transparent resins, specifically, for example,：Cellulose diacetate resin, tri acetic acid fiber
The cellulose esters system such as plain resin, cellulose acetate-butyrate resin, cellulose-acetate propionate resin resin；Poly terephthalic acid second two
The polyester based resins such as alcohol ester resin, polyethylene naphthalate resin；The acrylic acid series tree such as plexiglass
Fat；Polysulfones (also including polyether sulfone) is resin, polyvinyl resin, acrylic resin, cellophane, polyvinylidene chloride resin, poly- second
The ethylene such as enol resin, ethylene vinyl alcohol, styrene-based resin, cyclic olefine resin, polymethylpentene resin
Base system resin；Polycarbonate-based resin；Polyarylate system resin；Polyether ketone resin；Polyether-ketone imide resin；Polyamide-based tree
Fat；Fluorine resin etc..In these resins, preferred cellulose ester system resin, cyclic olefine resin, polycarbonate-based resin, polysulfones
(including polyether sulfone) is resin.Further preferred cellulose esters system resin, in cellulose esters system resin, preferred cellulose acetate tree
Fat, cellulose propionate resin, cellulose butyrate resin, cellulose acetate-butyrate resin, cellulose-acetate propionate resin, triacetic acid
Celluosic resin, particularly preferred cellulose triacetate resin.In addition, above-mentioned transparent resins can be used alone it is foregoing illustrative
Two or more can also be applied in combination in transparent resins.
Then, above-mentioned cellulose esters system resin is illustrated.
Cement viscosity that is strong from mechanical strength when being shaped to resin film and becoming appropriateness in solution curtain coating film method
From the aspect of, the number-average molecular weight of cellulose esters system resin is preferably 30000~200000.In addition, weight average molecular weight (Mw)/number
Average molecular weight (Mn) is preferably in the range of 1~5, more preferably in the range of 1.4~3.
In addition, gel permeation chromatography can be used in the average molecular weight and molecular weight distribution of the resins such as cellulose esters system resin
Or high effective liquid chromatography for measuring.Therefore, it is possible to use they calculate number average molecular weight (Mn), weight average molecular weight (Mw) and count
Calculate its ratio.
The acyl group that cellulose esters system resin preferably has acyl group, specifically carbon atom number is 2~4 is as substituent group.
As the degree of substitution of the acyl group, such as preferably 2.2~2.95.In addition, as its degree of substitution, such as by the degree of substitution of acetyl group
When being set as the degree of substitution of X, propiono or bytyry and being set as Y, the aggregate value of preferably X and Y is 2.2 or more and 2.95 hereinafter, i.e. X is big
In 0 and be 2.95 or less.
In addition, the part not replaced by acyl group exists usually in the form of hydroxyl.These cellulose esters system resins can pass through
Well known method synthesis.The assay method of the degree of substitution of acyl group can be measured according to the regulation of ASTM-D817-96.
Solvent used in present embodiment can be used containing the molten of the good solvent relative to above-mentioned transparent resins
Agent.Above-mentioned good solvent is different according to the transparent resins used.For example, when transparent resins are cellulose esters system resin, it is good
Solvent and poor solvent change according to the acyl substitution of cellulose esters, such as when using acetone as solvent, in fibre
Become good solvent in the acetic acid esters (degree of substitution with acetyl group 2.4) of the plain ester of dimension, cellulose-acetate propionate, in the acetic acid esters of cellulose
Become poor solvent in (degree of substitution with acetyl group 2.8).Therefore, good solvent and poor solvent according to the transparent resins used without
Together, therefore, as an example, the case where cellulose esters system resin, is illustrated.
As the good solvent relative to cellulose esters system resin, for example, the organic halogens chemical combination such as dichloromethane
Object, methyl acetate, ethyl acetate, pentyl acetate, acetone, tetrahydrofuran, 1,3- dioxolanes, 1,4- dioxanes, dioxolanes
Derivative, cyclohexanone, Methylethyl, 2,2,2 tfifluoroethyl alcohol, 2,2,3,3- hexafluoro -1- propyl alcohol, bis- fluoro- 2- propyl alcohol of 1,3-, 1,
1,1,3,3,3- hexafluoro -2- methyl-2-propanols, 1,1,1,3,3,3- hexafluoro -2- propyl alcohol, five fluoro- 1- propyl alcohol of 2,2,3,3,3-, nitre
Base ethane etc..In these good solvents, the preferably organohalogen compounds such as dichloromethane, dioxolane derivatives, methyl acetate, second
Acetoacetic ester, acetone etc..In these good solvents, preferred dichloromethane.These good solvents may be used alone, can also be used in combination
Two or more.
Alternatively, it is also possible to contain poor solvent in rubber cement in the range of transparent resins will not be precipitated.As opposite
In the poor solvent of cellulose esters system resin, for example, methanol, ethyl alcohol, normal propyl alcohol, isopropanol, n-butanol, sec-butyl alcohol,
The alcohol of the carbon atom numbers such as the tert-butyl alcohol 1~8, methyl ethyl ketone, methyl iso-butyl ketone (MIBK), propyl acetate, monochlorobenzene, benzene, hexamethylene, four
Hydrogen furans, methyl cellosolve, glycol monoethyl ether etc..In these poor solvents, preferred alcohol.These poor solvents can be independent
It uses, two or more can also be applied in combination.
In addition, the resin solution used in present embodiment can also contain in a range that does not hinder the effect of the present invention
There are other ingredients (additive) other than above-mentioned transparent resins and above-mentioned solvent.As above-mentioned additive, such as can lift
Go out particle, plasticizer, antioxidant, ultra-violet absorber, thermally-stabilised agent, conductive material, fire retardant, lubricant and delustring
Agent etc..
Then, as an example of the method for preparing rubber cement, to using cellulose esters system resin as transparent resins
The case where illustrate.
As the dissolving method of cellulose esters system resin when preparing rubber cement, it is not particularly limited, can uses general
Method.From the aspect of preventing gel or being referred to as the generation of the undissolved object of bulk of agglomerate, preferably by combination can be passed through
It is heated and pressurizeed more than the boiling point more than boiling point for the solvent being heated under normal pressure and under normal pressure to make cellulose esters system resin
It is dissolved in solvent.In addition, it also may be preferable for using cellulose esters system resin is mixed with poor solvent make its moisten or swelling after, into
One step adds good solvent and the method that dissolves.
Then, the solution for the cellulose esters system resin being obtained by filtration using the filtering material appropriate such as filter paper.
By the manufacturing method of the resin film of present embodiment as described above, the generation of albefaction is can inhibit, can be made for a long time
Make the resin film that the generation of albefaction is inhibited.In addition, the preferably fabricated acetic acid of the manufacturing method of the resin film of present embodiment is fine
The plain film of dimension is as resin film.By doing so, can inhibit the generation of albefaction and manufacture the cellulose acetate suitable for optical film etc.
Film.Therefore, the optical film of high-quality can be manufactured for a long time.
In addition, the thickness (film thickness) of above-mentioned resin film is preferably 5~25 μm.If such film thickness, then from liquid crystal display
The slimming of device or the steady production rate of resin film etc. consider preferred.In addition, film thickness in this refers to average film thickness.Make
For the assay method, for example, using the contact film thickness gauge of Mitutoyo Corp, 20 are measured in the width direction of optical film~
Film thickness at 200 calculates the average value of its measured value as film thickness.In addition, use from large-scale liquid crystal display device, partially
From the aspect of the service efficiency of resin film, the production efficiency when piece that shakes is processed, the width of the resin film obtained herein is preferably
1000~4000mm.
(polarizing film)
The protective film that the resin film obtained by the manufacturing method of the resin film of present embodiment can be used as polarizing film uses.
As above resin film is used to have polarizer as the polarizing film of protective film and configure saturating on the surface of above-mentioned polarizer
Bright protective film, above-mentioned transparent protective film are above-mentioned resin film.Incident light is become polarised light and projected by above-mentioned polarizer
Optical element.
As above-mentioned polarizing film, such as preferably made by polyvinyl alcohol mesentery is impregnated and stretched in iodine solution
At least surface of polarizer be bonded polarizing film made of above-mentioned resin film using fully saponified type polyvinyl alcohol water solution.
In addition, above-mentioned resin film can also be laminated in another surface in above-mentioned polarizer, other polarizing films can also be laminated
Transparent protective film.
Above-mentioned polarizing film is as described above using above-mentioned resin film as the guarantor for at least surface side for being laminated in polarizer
Cuticula.At this point, when above-mentioned resin film plays a role as phase difference film, preferably with the suction of the slow axis of resin film and polarizer
The substantial parallel or orthogonal mode of axis is received to configure.
Such polarizing film uses the resin film of present embodiment as transparent protective film.The resin film is height thin
Quality.Therefore, the polarizing film obtained is also high-quality thin.Therefore, the polarizing film obtained is for example applied to liquid crystal
, it can be achieved that the higher image quality of liquid crystal display device when showing device.
(liquid crystal display device)
In addition, above-mentioned resin film or above-mentioned polarizing film can be used for liquid crystal display device.Specifically, above-mentioned polarizing film can be made
It is used for the polarizing film of liquid crystal display device.The liquid crystal display device for having above-mentioned polarizing film has liquid crystal cells and in clamping
2 polarizing films that the mode of liquid crystal cells configures are stated, at least one of above-mentioned 2 polarizing films are above-mentioned polarizing film.In addition, liquid
Brilliant unit is filled with liquid crystal material between a pair of electrodes, and by applying voltage to the electrode, the state of orientation of liquid crystal, control can be changed
System penetrates light quantity.Transparent protective film of such liquid crystal display device using above-mentioned polarizing film as polarizing film.In this way
It does, the liquid crystal display device for the high image quality that contrast etc. is improved can be obtained.
Wherein main technology is summarized as follows as described above, disclose the technology of various schemes by this specification.
An aspect of of the present present invention be a kind of manufacturing method of resin film, have supply strip film supply step and
The film is stretched while conveying the film with multiple grips of the both side ends for the width direction for having held the film
Stretching process, wherein the thickness d in the holding region of the film held with the grips is 0.012~0.045mm, also,
With the part of the front end of the width direction of the film and the film being clamped by the grips position farthest from the front end
Between distance L meet the mode of following formula (1) and hold the film with the grips.
2.5mm≤L≤(1200×d-10.5)mm(1)
By such composition, it is possible to provide a kind of fully to inhibit the resin film of the issuable albefaction of film when stretching
Manufacturing method.The thickness in the holding region of the film in manufacture held by grips is 0.012~0.045mm, finally obtained
Resin film becomes relatively thin.Even if in grips week after replacement grips can be made if as manufacture when relatively thin resin film
The time that side generates albefaction is elongated.In addition, even if used using longer-term in stretching process grips if can be adequately suppressed
The albefaction that grips periphery generates.According to these situations, the issuable albefaction of film when stretching can be adequately suppressed.
In addition, in the manufacturing method of above-mentioned resin film, above-mentioned film is comprising above-mentioned holding region and than above-mentioned holding region
The central side region of the center side of the width direction of above-mentioned film is more leaned on, the thickness in above-mentioned holding region is preferably than above-mentioned central lateral areas
4~28 μm of domain thickness.
By such composition, film issuable albefaction when can further suppress stretching.That is, by making film as described above
By grips hold hold region than in contrast more lean on center side region thicken, the production of albefaction can be further suppressed
It is raw.In addition, even if when manufacturing relatively thin resin film, by thickening the holding region held by grips, albefaction can inhibit
Generation.According to these situations, though can be adequately suppressed if when manufacturing relatively thin resin film when stretching film there may be
Albefaction.
In addition, in the manufacturing method of above-mentioned resin film, above-mentioned stretching process is preferably following process：With multiple grips
Hold the both side ends of the width direction of above-mentioned film, and above-mentioned grips moves and above-mentioned along making along the length direction of above-mentioned film
2nd grips of multiple 1st grips of the one end of the above-mentioned film of holding in grips and the other end of the above-mentioned film of holding
Distance the direction that the width direction of above-mentioned film gradually extends move.
By such composition, it can suitably be stretched along the width direction of film, when it is stretched, can fully inhibit albefaction
It generates.
In addition, in the manufacturing method of above-mentioned resin film, above-mentioned stretching process may be following process：On one side with multiple
The both side ends that grips holds the width direction of the film convey on one side, change conveying side while maintaining gripping state
To thus making the more of the one end of the holding film in multiple grips of the both side ends of the width direction of the holding film
A 3rd grips is different with the displacement distance of the 4th grips of the other end of film is held, by the film along relative to width
It is that the direction more than 0 ° and less than 90 ° is stretched into line tilt to spend direction.
By such composition, film along inclined direction can suitably be stretched, when the inclination stretches, can be adequately suppressed
The generation of albefaction.
In addition, in the manufacturing method of above-mentioned resin film, above-mentioned supply step is preferably provided with will be containing transparent resins
Resin solution is cast to mobile supporting mass by curtain coating mould and is formed the curtain coating process of casting films and removed from above-mentioned supporting mass
Above-mentioned casting films and obtain the stripping process of above-mentioned film.
By such composition, the film for stretching process can be continuously fed.Can be continuously manufactured by as a result, inhibit it is white
The resin film of the generation of change.
In addition, in the manufacturing method of above-mentioned resin film, above-mentioned stretching process preferably makes to make while above-mentioned film stretching
The process of above-mentioned film drying.
If such composition, then makes its stretching in the process for making film dry, therefore, resin film can be effectively manufactured.
In addition, if the process for making to dry film while film stretching, then in general film easy tos produce albefaction.If the one of the present invention
The manufacturing method of the resin film of aspect can be adequately suppressed the generation of albefaction if even if being then such process.Therefore, can have
The manufacture of effect ground inhibits the resin film of the generation of albefaction.
In addition, in the manufacturing method of above-mentioned resin film, above-mentioned film is preferably cellulose ester membrane.
It, can be on one side inhibiting being manufactured while generation for albefaction to be suitable as the cellulose esters of optical film if such composition
Film.
In addition, in the manufacturing method of above-mentioned resin film, the above-mentioned distance L in the grips of the one end of above-mentioned film is held
It may be the same or different with the above-mentioned distance L in the grips of the other end for keeping above-mentioned film.In addition, in addition, also may be used
To change above-mentioned distance in a side and another party according to the state of grips.For example, can be according to used in stretching process
Period changes above-mentioned distance.
Through the invention, it is possible to provide a kind of system suppressed sufficiently the resin film of the issuable albefaction of film when stretching
Make method.
The present invention is specifically described hereinafter, enumerating embodiment, but the present invention is not limited to these embodiments.
[embodiment]
[embodiment 1~11, comparative example 1~3]
(preparation of rubber cement)
First, addition is used as the transparency in the dissolving tank for being put into 23 mass parts of 418 mass parts of dichloromethane and ethyl alcohol
Cellulose triacetate resin (degree of substitution 2.88 of acetyl group) 100 mass parts of resin, then add 8 mass parts of triphenyl phosphate,
2 mass parts of ethyl phthalyl, (BASF Amada Co., Ltd.s system) 1 mass parts of Tinuvin 326 and
Aerosil 200V (Japanese Aerosil Co. Ltd. systems) 0.1 mass parts.Then, make its heating after liquid temperature becomes 80 DEG C,
Stirring 3 hours.In this way, resin solution is obtained.Then, terminate stirring, place until liquid temperature becomes 43 DEG C.Then, it uses
Resin solution after the filter paper filtering placement of filtering accuracy 0.005mm.By the way that filtered resin solution is placed a night, make tree
Bubble deaeration in lipoprotein solution.Resin film is manufactured as follows as rubber cement using the resin solution as above obtained.
(manufacture of resin film)
First, the temperature of obtained rubber cement is adjusted to 35 DEG C, the temperature of endless belt supporting mass is adjusted to 20 DEG C.So
Afterwards, using the manufacturing device of resin film as shown in Figure 1, the film when slit separation of the ejiction opening of adjustment curtain coating mould is to stretch
Thickness be thickness shown in table 1 and table 2, stretch when film width be 1160mm mode manufacture film.
First, rubber cement is cast by curtain coating mould (coat hanger die) on the supporting mass of endless belt.In addition, as endless belt supporting mass,
Using by stainless steel (SUS316 systems) and to be polished to the 3 dimension table faces obtained using sweep type atomic force microscope (AFM) thick
The endless belt supporting mass that the endless belt of the super minute surface of rugosity (Ra) average out to 1.0nm is constituted.
Then, the dry wind that net of the drying machine on side on the supporting mass of endless belt send 30 DEG C is supported from endless belt, thus
Make net drying.The net dried is removed in membrane form from the supporting mass of endless belt.By the film removed on one side with conveying
Roller conveying is dried on one side until residual solvent rate is 80 mass %.
For the film dried, fixture holding film is used on one side in the environment of 140 DEG C using stretching device (stenter)
The one edge directions TD of both ends stretch 22% after, release clip.
In addition, the holding position of the film as fixture, with the portion of the front end of the width direction of film and film being clamped by fixture
Detach (the ends from the width direction central portion side of the film for the part of film being clamped by fixture distance L of the farthest position in front end
To the distance L of the front end of the width direction of film) as the mode fixture holding film of L shown in following table 1 and table 2.
Then, the film dried is wound with winding device, this makes it possible to obtain the resin films for being wound into roll.
[evaluation (albefaction)]
Obtained resin film is evaluated as follows.
By as the clamp-replacing of grips be new product after, measure using usage time be 2100 hours when and 2800 hours
Fixture obtained from resin film mist degree.As measurement site, the width direction away from the resin film before cut-out end is measured
The position of front end 4.5cm and in different 10 points of length direction.As determination condition, mist is used under 23 DEG C, 55%RH environment
Instrument (NDH2000 of Japan electricity color industrial (strain) system) is spent to measure.The results are shown in tables 1.
In addition, the more front end sides front end 4.5cm than the width direction away from the resin film before cut-out end exist because with fixture
The deformation of film caused by holding.Therefore, mostly by the partial cut.In addition, if mist degree is 0.6% or more, it is not suitable as partially
Shake the transparent protective film of piece.According to these situations, if above-mentioned mist degree is 0.6% or more, need cut-out remove produce because
It is more than the part of the deformation of the film caused by being held with fixture.
Table 1
Table 2
By table 1 and table 2 it is found that even if the film that the thickness in the holding region held using fixture is 0.012~0.045mm
When stretching, as the position with fixture holding film, the case where distance L meets above-mentioned formula (1) (embodiment 1~11), not with distance L
The case where meeting above-mentioned formula (1) (comparative example 1~4), is compared, and the generation of albefaction is can inhibit.
In addition, understanding that the thickness in the holding region held with fixture is thicker than the central lateral areas for more leaning on center side than holding region
The case where domain (embodiment 5~11) compared with holding region and the identical situation (Examples 1 to 4) of the center thickness of side region,
It can inhibit the generation of albefaction.In turn, it is known that the case where difference of its thickness is 4~28mm (embodiment 5~8) and the difference of thickness are less than
The case where 4mm (embodiment 9~11), is compared, and the generation of albefaction can be further inhibited.
This application on the basis of Japanese patent application Japanese Patent Application filed in 16 days June in 2015 2015-120989,
Content includes in this application.
In order to state the present invention, this hair is adequately and sufficiently illustrated by embodiment while with reference to attached drawing above
It is bright, but if being those skilled in the art, then it should be realized that it is to be easily able to that change and/or person, which improve the above embodiment,
's.Therefore, those skilled in the art implement change mode or mode of ameliorating are without departing from recorded in claims
The interest field of claim, then be construed to the change mode or the mode of ameliorating is included in the interest field of the claim
In.
Industrial utilizability
Through the invention, it is possible to provide a kind of manufacture of the resin film of film issuable albefaction when suppressed sufficiently stretching
Method.
Claims (7)
1. a kind of manufacturing method of resin film, which is characterized in that have：
Supply step supplies the film of strip, and
Stretching process, with the multiple grips for the both side ends for having held the film width direction. while conveying the film
Stretch the film；
Wherein, the film is cellulose ester membrane,
The temperature of film when stretching is 100~150 DEG C,
The thickness d in the holding region of the film held by the grips is 0.012~0.045mm,
Also, with the front end of the width direction of the film with the part of the film being clamped by the grips from the front end
The mode that distance L between farthest position meets following formula (1) holds the film with the grips,
2.5mm≤L≤(1200×d-10.5)mm (1)。
2. the manufacturing method of resin film according to claim 1, wherein the film includes described in the holding region and ratio
The central side region of the center side of the width direction of the film is more leaned in holding region,
The thickness for holding region is 4~28 μm thicker than the central side region.
3. the manufacturing method of resin film according to claim 1, wherein the stretching process is following process：It uses on one side
Multiple grips hold the both side ends of the width direction of the film, and the grips is made to be moved along the length direction of the film on one side
Multiple grips of one end dynamic and along the holding film made in the grips and the other end of the holding film
The distance of grips moves in the direction that the width direction of the film is gradually expanded.
4. the manufacturing method of resin film according to claim 1, wherein the stretching process is following process：It uses on one side
The both side ends that multiple grips hold the width direction of the film convey on one side, change conveying while maintaining gripping state
Direction, to make the holding film width direction both side ends multiple grips in the holding film one end
Multiple grips are different with the displacement distance of grips of the other end of film is held, by the film along relative to width side
It is stretched to for the direction more than 0 ° and less than 90 ° into line tilt.
5. the manufacturing method of resin film according to claim 1, wherein the supply step has：
It is cast process, the resin solution containing transparent resins is cast to by curtain coating mould on mobile supporting mass and forms curtain coating
Film, and
Stripping process removes the casting films from the supporting mass and obtains the film.
6. the manufacturing method of resin film according to claim 1, wherein the stretching process be make the film stretching and
Make the process of the film drying.
7. the manufacturing method of resin film according to claim 1, wherein hold the institute of the grips of the one end of the film
It is different with the distance L of grips of the other end of film is held to state distance L.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015-120989 | 2015-06-16 | ||
| JP2015120989A JP2017001367A (en) | 2015-06-16 | 2015-06-16 | Production method of resin film |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106256525A CN106256525A (en) | 2016-12-28 |
| CN106256525B true CN106256525B (en) | 2018-10-19 |
Family
ID=57714017
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610414417.1A Active CN106256525B (en) | 2015-06-16 | 2016-06-13 | The manufacturing method of resin film |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP2017001367A (en) |
| KR (1) | KR20160148455A (en) |
| CN (1) | CN106256525B (en) |
| TW (1) | TW201708090A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019151093A (en) * | 2017-10-31 | 2019-09-12 | 住友化学株式会社 | Method for producing resin film |
| JP7066427B2 (en) * | 2018-02-01 | 2022-05-13 | 日東電工株式会社 | Film stretching device and manufacturing method of stretched film |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3982863A (en) * | 1972-05-12 | 1976-09-28 | Imperial Chemical Industries Limited | Quenching of polymeric film |
| JP2822888B2 (en) | 1994-06-27 | 1998-11-11 | 東レ株式会社 | Web production method and production apparatus |
| US5771547A (en) * | 1997-08-14 | 1998-06-30 | E.I. Du Pont De Nemours And Company | Tenter clip cleaning method and apparatus |
| JP4250494B2 (en) * | 2003-10-01 | 2009-04-08 | 富士フイルム株式会社 | Film stretching apparatus and solution casting method using the same |
| DE102004012439B4 (en) * | 2004-03-13 | 2007-06-14 | Illig Maschinenbau Gmbh & Co. Kg | Method for deep-drawing and punching of containers made of a thermoplastic film and apparatus for deep drawing and punching of containers |
| DE102010038076B4 (en) * | 2010-10-08 | 2022-04-21 | Collin Lab & Pilot Solutions Gmbh | Device for mono- or biaxial stretching of film sections (stretching frame) |
| CN203011757U (en) * | 2013-01-11 | 2013-06-19 | 青岛中科华联新材料有限公司 | Film tensile testing device |
-
2015
- 2015-06-16 JP JP2015120989A patent/JP2017001367A/en active Pending
-
2016
- 2016-04-20 TW TW105112292A patent/TW201708090A/en unknown
- 2016-06-08 KR KR1020160070707A patent/KR20160148455A/en not_active Application Discontinuation
- 2016-06-13 CN CN201610414417.1A patent/CN106256525B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| TW201708090A (en) | 2017-03-01 |
| CN106256525A (en) | 2016-12-28 |
| KR20160148455A (en) | 2016-12-26 |
| JP2017001367A (en) | 2017-01-05 |
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