CN106256525A - The manufacture method of resin molding - Google Patents
The manufacture method of resin molding Download PDFInfo
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- CN106256525A CN106256525A CN201610414417.1A CN201610414417A CN106256525A CN 106256525 A CN106256525 A CN 106256525A CN 201610414417 A CN201610414417 A CN 201610414417A CN 106256525 A CN106256525 A CN 106256525A
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- Prior art keywords
- film
- mentioned
- grips
- resin molding
- described film
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
- B29C41/24—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of indefinite length
- B29C41/28—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of indefinite length by depositing flowable material on an endless belt
-
- 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
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (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 the manufacture method of a kind of resin molding, it possesses the supply step of the film supplying strip and carries described film by multiple grips of the both side ends of the width having held described film while stretching the stretching process of described film, wherein, described film with described grips hold hold region thickness d be 0.012～0.045mm, and, by the front end of the width of described film and the part clamped by described grips of described film, distance L between the position that described front end is farthest holds described film by described grips in the way of meeting following formula (1).2.5mm≤L≤(1200×d‑10.5)mm (1).
Description
Technical field
The present invention relates to the manufacture method of a kind of resin molding.
Background technology
Resin molding is used for various field, such as liquid crystal display in view of its chemical characteristic, mechanical property and electrical characteristics etc.
Device etc..Specifically, the image display area at liquid crystal indicator is configured with various resin molding as protecting polarization
The bloomings such as the transparent protective film of the polarizer of sheet.As such resin molding, such as, cellulose ester membrane etc. is widely used
The resin molding that the transparency is excellent.
The resin moldings such as cellulose ester membrane such as can use and the material resins such as cellulose esters system resin are dissolved in solvent form
Resin solution (rubber cement) manufacture.As the manufacture method of the resin molding employing such rubber cement, specifically, the most permissible
Enumerate solution casting film method etc..Solution casting film method is following method: is cast rubber cement on the supporting mass of movement and is formed
Casting films (net) so that it is be dried to strippable degree, peels off in membrane form from described supporting mass, the film one that will peel off
While with conveying roller conveying while being dried or stretching, manufacture the resin molding of strip.
Patent literary composition can be enumerated as the method for such manufacture resin molding, the such as method as stretched film in the mill
Offer the manufacture method described in 1.
Having the manufacture method of a kind of net described in patent documentation 1, wherein, the edge of the net during detection is mobile based on drawing
The upstream of described gripping point is also detected in the absolute position of the net width of this tenter clip in the gripping point of width machine clamp
In the absolute position of net width at edge of described net, by the net width of the described tenter clip detected
The described tenter clip in described gripping point is obtained in the absolute position of the net width at the edge of absolute position and described net
Net holding amount, by with the regulation being preset with this net holding amount net hold quantitative change equal in the way of control described in draw
The position of width machine clamp is while passing through described tenter clip along net width stretching nets.According to patent documentation 1, it discloses
The position that holds of tenter clip can be controlled the holding amount for specifying accurately.
It addition, in the method manufacturing resin molding, if stretched film in the mill, when stretching, film produces albefaction the most sometimes.
Prior art literature
Patent documentation
Patent documentation 1: Japanese Unexamined Patent Publication 8-12144 publication
Summary of the invention
The present invention completes in view of this situation, its object is to, it is provided that one suppressed sufficiently stretching time
The manufacture method of the resin molding of the albefaction produced on film.
An aspect of of the present present invention is the manufacture method of a kind of resin molding, it is characterised in that possess the film of supply strip
Supply step and the multiple grips by the both side ends of the width having held described film carry described film while drawing
Stretch the stretching process of described film, wherein, the thickness d holding region held by described grips of described film be 0.012～
0.045mm, and, with the front end of the width of described film and the part clamped by described grips of described film before described
The described grips of mode holding distance L between farthest position to meet following formula (1) holds described film.
2.5mm≤L≤(1200×d-10.5)mm(1)
Above-mentioned and other the purpose of the present invention, feature and advantage are recorded by greater detail below and appended accompanying drawing carries out bright
Really.
Accompanying drawing explanation
Fig. 1 is the manufacture device of the resin molding of the manufacture method representing the resin molding employing embodiments of the present invention
The skeleton diagram of one example of basic composition.
The manufacture device of the resin molding that Fig. 2 employs the manufacture method of resin molding in present embodiment by expression is had
The skeleton diagram of one example of standby stretching device.
Fig. 3 is the profile of the grips (fixture) in terms of the hatching III-III from the stretching device shown in Fig. 2.
The manufacture device of the resin molding that Fig. 4 employs the manufacture method of resin molding in present embodiment by expression is had
The skeleton diagram of other example of standby stretching device.
Detailed description of the invention
According to the research of the present inventor, if manufacturing cellulose acetate by the manufacture method of the net described in patent documentation 1
The resin moldings such as ester film, the albefaction produced at the periphery of the grips such as tenter clip when the most sometimes cannot be adequately suppressed stretching
Deng.
It addition, having the polyester film of thickness 13 μm described in patent documentation 1 with the holding amount that sets as the mode of 14mm
Carry out stretching as an example, but do not record the thickness according to film and adjust holding amount.The system of the net described in patent documentation 1
Although the method for making can control to measure for holding set in advance accurately, but the thickness of corresponding film cannot be adjusted to suitable holding
Amount.
The part that albefaction as above, mist degree raise is not suitable as blooming and uses, and therefore, creates the tree of albefaction
Adipose membrane will cut away the part of albefaction and by remaining part for blooming.Thus, the part along with albefaction becomes big, cuts away
Part increase, it is impossible to corresponding wide cut or manufacture efficiency and reduce.
According to these situations, it is desirable to the system of a kind of resin molding that suppressed sufficiently the albefaction produced on film when stretching
Make method.
According to the research of the present inventor, send out to currently use and produce at grips periphery when multiple fixtures etc. carry out grips stretched film
Raw albefaction, easily produces when being changed without grips for a long time and stretch.That is, find grips is being replaced by new handle
After gripping member, even if not producing this albefaction, after some period of time, such as after latter 1 year of replacing, albefaction is the most easily produced.Push away
Survey this and depend on situations below.That is, the stretching of film is carried out the most in high temperature environments.And make for a long time under such hot environment
Grips be deformed and abrasion etc..Think the reason that this deformation etc. is albefaction.Specifically, because of the deformation of grips,
Skew is produced, it is believed that this skew becomes albefaction between film is applied by grips when stretching stress and the stress originally supposed
Reason.
Thus, in the manufacture method of resin molding, when carrying out the stretching employing grips, regularly replace grips.
Accordingly, because the albefaction using the grips of life-time service and producing will not become big problem.But, the present inventor etc. find with
The filming development of resin molding, the situation that the time of generation albefaction increasingly shortens.Thus, the present inventor is for making generation be somebody's turn to do
The time of albefaction is elongated to be studied.
In the past, the holding position of grips film when in stretching will not hold in the way of disengaging deeper from grips.
But, present inventor is studied for this holding position, found that the time producing albefaction is different because holding position.
That is, find to hold position shallower then the most effective at the aspect of suppression generation albefaction.Even if additionally, it was found that it also can suppress for thin film
The generation of albefaction.
According to above situation, the present inventor etc. is conceived to the condition during stretching in the manufacture method of resin molding, so that
Expect the present invention as described below.
Hereinafter, embodiments of the present invention are illustrated, but the present invention is not limited to these embodiments.
The manufacture method of the resin molding of embodiments of the present invention possesses the supply step of the film of supply strip and uses handle
Multiple grips of the both side ends having held the width of above-mentioned film carry above-mentioned film while stretching the stretching of above-mentioned film
Operation.And, above-mentioned film with above-mentioned grips hold hold region thickness d be 0.012～0.045mm (12～45 μ
m).That is, the film thickness when manufacture method of above-mentioned resin molding is to be manufactured as stretching by above-mentioned stretching process use above-mentioned
The resin molding that thickness is 12～45 μm holding region that gripping member holds.
It addition, in above-mentioned stretching process, as the holding position with the above-mentioned grips above-mentioned film of holding, be above-mentioned film
The front end of width and the part clamped by above-mentioned grips of above-mentioned film distance L between the position that above-mentioned front end is farthest are full
The position of foot following formula (1).It is i.e. the width central authorities of the above-mentioned film of the part clamped by above-mentioned grips from above-mentioned film
The end of side, portion meets the position of following formula (1) to distance L of the front end of the width of above-mentioned film.Above-mentioned stretching process is to become
Mode for such holding position holds above-mentioned film by above-mentioned grips.
2.5mm≤L≤(1200×d-10.5)mm(1)
The thinner thickness holding region held by grips in film in manufacture, is 0.012～0.045mm, therefore,
Final available relatively thin resin molding.Even if when manufacturing such relatively thin resin molding, by forming as above holding
Position is as holding position, to the time change producing albefaction at grips periphery after can making replacing grips.That is, even if making
It is used in the grips that in stretching process, the long period uses, it is possible to be adequately suppressed the albefaction produced at grips periphery.Relatively
In this, if above-mentioned distance L is too short, then the tendency that when there is stretching, film easily comes off from grips.If it addition, in order to suppress film
Depart from from grips and excessively extend above-mentioned distance L, then exist and cannot give full play to make until the grips periphery of film produces
The tendency of time elongated such effect of albefaction.Accordingly, as the holding position of grips, by meet above-mentioned formula (1)
Mode grips hold film and make it stretch, can be adequately suppressed stretching time film in produce albefaction.
It addition, the thickness d holding region held by above-mentioned grips of above-mentioned film is 12～45 μm as mentioned above, preferably
It is 16～40 μm, more preferably 18～32 μm.The thickness d as above institute holding region held by grips in film in manufacture
State relatively thin, therefore, final available relatively thin resin molding.It addition, when manufacturing the most relatively thin resin molding, exist easily at handle
Gripping member periphery produces the tendency of albefaction.As long as despite this, be the manufacture method of the resin molding of present embodiment, as long as i.e. possessing
Above-mentioned stretching process, even if then when manufacturing such relatively thin resin molding, it is possible to so that in grips after changing grips
The time that periphery produces albefaction is elongated.
It addition, as with above-mentioned grips hold above-mentioned film holding position, be above-mentioned distance L meet above-mentioned formula (1) this
The position of sample.It addition, this distance L preferably meets following formula (2).By so, can suppress further to produce at grips periphery
Albefaction, the most elongated to the time producing albefaction at grips periphery after replacing grips can be made.
2.5mm≤L≤(1140×d-10.5)mm(2)
It addition, above-mentioned stretching process is the two side ends with the width having held the film supplied in above-mentioned supply step
Multiple grips in portion carry above-mentioned film while stretching the operation of above-mentioned film, as long as being that the operation meeting above-mentioned condition does not just have
It is particularly limited to.
As long as it addition, the film that above-mentioned supply step can be supplied to strip is just not particularly limited.As above-mentioned supply step,
The operation etc. that Tong Guo solution casting film method as described later of such as can enumerating continuously feeds the film of strip.Concrete and
Speech, above-mentioned supply step is preferably provided with being cast on the supporting mass of movement the resin solution containing transparent resins by being cast mould
And form the curtain coating operation of casting films and from above-mentioned supporting mass, peel off above-mentioned casting films and obtain the stripping process of above-mentioned film.Only
Possess such supply step, then can continuously feed the film for stretching process.Therefore, can be continuously manufactured by inhibiting white
The resin molding of the generation changed.
It addition, hold above-mentioned distance L of the grips of the one end of above-mentioned film and the handle of the other end of the above-mentioned film of holding
Above-mentioned distance L of gripping member can be identical, it is also possible to different.Alternatively, it is also possible to according to the state of grips a side and the opposing party
Change above-mentioned distance.Such as can change above-mentioned distance according to the use used in stretching process.
As long as the manufacture method of the resin molding of present embodiment possesses above-mentioned supply step and above-mentioned stretching process does not just have
It is particularly limited to.Specifically, such as, can enumerate: in solution casting film method, from supporting mass after stripping film, to being peeled off
Film implement above-mentioned stretching process and manufacture the method etc. of resin molding.Specifically, the manufacturer of the resin molding of present embodiment
Method is to possess to be cast on the supporting mass of movement be formed stream by the resin solution (rubber cement) containing transparent resins by curtain coating mould
Prolong the curtain coating operation of film (net), the stripping process above-mentioned casting films peeled off in membrane form from above-mentioned supporting mass and to being shelled
From the manufacture method based on so-called solution casting film method of above-mentioned stretching process implemented of film.It addition, as resin molding
Manufacture method, in addition to above-mentioned each operation, it is also possible to enumerate the drying process making the film peeled off be dried and winding finally gives
Resin molding and form the rolling step of roll body.It addition, above-mentioned stretching process can also stretch and make above-mentioned film for making above-mentioned film
The operation being dried.If such operation, then make it stretch in the operation making film be dried, therefore, can effectively manufacture tree
The aspect of adipose membrane is preferred.If it addition, make film stretching and the operation making film be dried, the most easily producing white in film
Change.But, if the stretching process of present embodiment, though the stretching carried out when being then and as above make film be dried, it is possible to fully
The generation of suppression albefaction.Therefore, the resin molding of the generation inhibiting albefaction can effectively be manufactured.
It addition, such manufacture method based on solution casting film method such as can by as shown in Figure 1 based on molten
The manufacture device etc. of the resin molding of liquid casting film method is carried out.It addition, as the manufacture device of resin molding, as long as carrying out above-mentioned
Each operation is just not limited to the device shown in Fig. 1, it is also possible to the device constituted for other.It addition, film in this refers to by being cast
The casting films (net) that rubber cement on supporting mass is constituted be dried on supporting mass and become the state that can peel off from supporting mass with
After film.
Fig. 1 is the basic of the manufacture device of the resin molding of the manufacture method representing the resin molding employed in present embodiment
The skeleton diagram of the example constituted.The manufacture device of resin molding possess endless belt supporting mass 11, curtain coating mould 15, stripper roll 13,
Stretching device 21, drying device 17 and coiler device 19 etc..Curtain coating mould 15 is by the resin solution (rubber cement) containing transparent resins
14 spray 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 pair of rolls 12
Support dynamicly, form the casting films (net) being made up of the resin solution 14 being cast from curtain coating mould 15, carry and make it do
Dry until can use the degree that above-mentioned stripper roll 13 is peeled off.Then, above-mentioned stripper roll 13 is peeled off from above-mentioned endless belt supporting mass 11
To a certain degree be dried casting films and obtain film 16.The film 16 peeled off waits the direction of regulation in the width direction by stretching device 21
Stretching.It addition, the film 16 stretched is further dried by drying device 17, the film F being dried is passed through volume as resin molding
Winding apparatus 19 is wound into roll.
As long as rubber cement 14 can be sprayed with ribbon and be 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 pipe supply rubber cement from the rubber cement being connected to upper end.Then, this institute supplies
Rubber cement spray to above-mentioned endless belt supporting mass 11 from above-mentioned curtain coating mould 15, on above-mentioned endless belt supporting mass 11 formed net.
Endless belt supporting mass 11 is illustrated in figure 1 the endless belt of loopy moving, and the most preferably using surface is minute surface
The metal endless belt etc. of loopy moving.As endless belt, from the standpoint of the fissility of casting films, the most preferably make
With the band being made up of rustless steel etc..Alternatively, it is also possible to use idler body to replace endless belt supporting mass.As this idler
Body, the metal cylinder etc. of the rotation the most preferably using surface to be minute surface.
Then, what endless belt supporting mass 11 carried that the casting films (net) formed on its surface makes in rubber cement is molten
Agent is dried.Above-mentioned being dried such as can be carried out by heating endless belt supporting mass 11 or net winding-up being added hot blast.
It addition, the translational speed of endless belt supporting mass 11 is not particularly limited, but be such as preferably 50～200m/ minute left
Right.It addition, the translational speed of endless belt supporting mass 11 is relative to the ratio i.e. draw ratio of rubber cement 14 spouting velocity of curtain coating mould 15 certainly
It is not particularly limited, but is such as preferably 0.8～about 5.0.As long as above-mentioned draw ratio is within the range, then can be stably formed
Casting films.If such as draw ratio is excessive, then there is the tendency producing contracting such phenomenon that casting films reduces at width,
If it is the case, the film of wide cut then cannot be formed.
Stripper roll 13 is arranged in the near surface of the curtain coating rubber cement side of endless belt supporting mass 11, endless belt supporting mass 11 and stripping
Distance from roller 13 is preferably 1～100mm.It addition, stripper roll 13 on endless belt supporting mass 11 to a certain degree be dried
Use when net is peeled off.As fulcrum, the net applying tension force being dried is carried out tractive, by be dried using this stripper roll 13
Net is peeled off with the form of film 16.It addition, when stripping film on endless belt supporting mass 11, by peeling off tension force and conveying afterwards
Film 16 is stretched by tension force at the conveying direction (Machine Direction:MD direction) of film.
As long as multiple grips that above-mentioned stretching device 21 is the both side ends possessing the width holding film 16 also can
The device being carried out above-mentioned stretching process by the plurality of grips etc. is just not particularly limited.As above-mentioned stretching device 21, example
As can enumerate as shown in Figure 2 make film 16 in direction (the Transverse Direction:TD side orthogonal with conveying direction
To) stretching device that stretches.Such stretching device is specifically as in figure 2 it is shown, pass through vertical with the conveying direction of film 16
The both ends in direction (width) be used as the fixture 24,25 of grips and hold and increase between opposed fixture 24,25
Distance and TD direction stretch.
The manufacture device of the resin molding that Fig. 2 employs the manufacture method of resin molding in present embodiment by expression is had
The skeleton diagram of one example of standby stretching device.Above-mentioned stretching device 21 possesses the 1st guide rail the 22, the 2nd guide rail 23 and multiple folder
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
For 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.
It addition, above-mentioned 2nd guide rail 23 is along the other end extension of above-mentioned film 16, determine the moving direction of above-mentioned fixture 25 as described later.
Above-mentioned fixture 24,25 holds the end of the width of above-mentioned film 16 respectively.It addition, above-mentioned fixture 24,25 is respectively
Not shown ring chain separates predetermined distance configuration.Then, the ring chain being configured with above-mentioned fixture 24 hang on one
To sprocket wheel 26,28.It addition, the ring chain being configured at above-mentioned fixture 25 hang on pair of sprocket 27,29.Sprocket wheel 28,29 is by step
Enter the driving source such as motor to rotate and drive, for above-mentioned each ring chain is given ring rotation driving force.It addition, sprocket wheel
26,27 rotatably arrange, the driven rotation with the ring rotation of ring chain based on sprocket wheel 28,29.Then, above-mentioned
The annular of each ring chain is walked around and is guided by above-mentioned 1st guide rail 22 and above-mentioned 2nd guide rail 23.As it has been described above, be configured with above-mentioned folder
The ring chain of tool 24 and above-mentioned fixture 25 is by when being entered when guiding by above-mentioned 1st guide rail 22 and above-mentioned 2nd guide rail 23
Row ring rotation, above-mentioned fixture 24,25 is led the above-mentioned 1st when holding the end of width of above-mentioned film 16 respectively
On rail 22 and above-mentioned 2nd guide rail 23, the conveying direction along film 16 moves successively.
The moving direction of above-mentioned fixture 24,25 is identified below.
First, above-mentioned each fixture 24,25 holds the both ends of width of film only along the length of above-mentioned film 16
Degree direction is moved.That is, move in the way of changing the distance between above-mentioned fixture 24 and above-mentioned fixture 25 hardly.
Then, above-mentioned each fixture 24,25 moves along the length direction of above-mentioned film 16, and along in the width side of above-mentioned film 16
Move to the direction of the spacing gradually extending above-mentioned fixture 24 and above-mentioned fixture 25.By doing so it is possible, by above-mentioned film 16 along width
Direction stretches.Now, the length direction of the film 16 before stretching and stretching time above-mentioned fixture 24 or above-mentioned fixture 25 formed by angle θ
1 is preferably 1～50 °.If above-mentioned angle θ 1 is too small, then extensibility step-down, there is the inclining of wide cut that cannot fully realize resin molding
To.If it addition, above-mentioned angle θ 1 is excessive, then the periphery at the position existing that serve as fixture 24,25 holding for grips deforms
Tendency, according to circumstances, film 16 ftractures sometimes.
Finally, above-mentioned each fixture 24,25 moves in the way of changing the distance between them hardly.That is, to keep logical
Overstretching and the mode at interval that extends move.By doing so it is possible, the caudacoria 16 discharging above-mentioned each fixture 24,25 can be suppressed to exist
Width produces and shrinks.
It addition, when making above-mentioned film 16 stretch, generally film 16 is carried out heating and carries out.The heating of this film 16 is the most especially
Limit, such as, can carry out by film winding-up is added hot blast, it is also possible to heated by heaters such as infrared ray.It addition,
The temperature of film during stretching also according to the composition etc. of film and different, the most preferably 100～150 DEG C.By such heating, can
So that film is dried.Specifically, as it has been described above, above-mentioned stretching process preferably makes the stretching of above-mentioned film and the work making above-mentioned film be dried
Sequence.So, owing to making it stretch in the operation making film be dried, therefore, resin molding can effectively be manufactured.If it addition, making film draw
The operation stretched and make film be dried, the most easily produces albefaction in film.If the manufacture of the resin molding of present embodiment
Method, even if being then such operation, it is possible to be adequately suppressed the generation of albefaction.Therefore, can effectively manufacture and inhibit albefaction
The resin molding of generation.
As long as the fixture 24,25 as grips can hold film, then its structure is not particularly limited, specifically, such as
The fixture of structure as shown in Figure 3 can be enumerated.It should be noted that Fig. 3 is cuing open from the stretching device 21 shown in Fig. 2
The profile of the fixture 24,25 that upper thread III-III sees.
Above-mentioned fixture 24,25 contains movable part 31 and pedestal 32 as shown in Figure 3 and constitutes.Above-mentioned movable part 31 is rotatable
Ground axle suspension is in above-mentioned pedestal 32.Above-mentioned fixture 24,25 is by making above-mentioned movable part 31 rotate and using above-mentioned movable part 31 by upper
State film 16 and sandwich above-mentioned pedestal 32 to hold above-mentioned film 17.
It addition, the front end 16a holding the width that position is above-mentioned film 16 of above-mentioned fixture 24,25 and above-mentioned film 16
The position of above-mentioned formula (1) is met by the part of above-mentioned fixture 24,25 clamping distance L between above-mentioned position 16b farthest for front end 16a
Put.The part by the clamping of above-mentioned fixture 24,25 of above-mentioned film 16 is above-mentioned film 16 quilt from above-mentioned position 16b farthest for front end 16a
The part of above-mentioned movable part 31 and above-mentioned pedestal 32 clamping is from above-mentioned position farthest for front end 16a.It is above-mentioned movable part 31 He
The part that above-mentioned pedestal 32 all contacts with above-mentioned film 16 is from above-mentioned position farthest for front end 16a.If it addition, the quilt of above-mentioned film 16
The part of above-mentioned fixture 24,25 clamping is above-mentioned position from above-mentioned position 16b farthest for front end 16a, then be not limited to Fig. 3
Shown 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
The 1st contact surface 33 contacted with above-mentioned film 16 of 31 extends to the width center side of above-mentioned film 16.Now, above-mentioned film 16
By the part of above-mentioned fixture 24,25 clamping from above-mentioned position 16b farthest for front end 16a it is and above-mentioned film 16 and above-mentioned movable part 31
The part of contact is from above-mentioned position farthest for front end 16a.It addition, above-mentioned 1st contact surface 33 extends to from above-mentioned 2nd contact surface 34
During the width center side of above-mentioned film 16, for the part that contacts with above-mentioned film 16 and above-mentioned pedestal 32 away from above-mentioned front end 16a
Remote position.
It addition, the thickness holding region held by above-mentioned fixture 24,25 of the above-mentioned film 16 held by above-mentioned fixture 24,25
Degree d preferably more leans on the thickness d in the center side region of the width center side of above-mentioned film 16 than above-mentioned holding region ' thick 4～28 μ
M, more preferably thick 8～22 μm.The albefaction that film produces when stretching exists easily at inclining that the fixture periphery as grips produces
To.It addition, there is the tendency that film is the thinnest more easily produces in such albefaction.According to these situations, by thickening holding further
The thickness in region makes it be thicker than the thickness in center side region, can play the effect of the generation of suppression albefaction further.Even if it addition,
When manufacturing relatively thin resin molding, the holding region held by grips by thickening, can suppress the generation of albefaction.According to these
Situation, even if when manufacturing relatively thin resin molding, it is possible to film issuable albefaction when being adequately suppressed stretching.Even if it addition,
Hold the thickness d thickness d than center side region in region ' thick, if its difference is little, then the effect that the difference of this thickness produces tails off.Separately
Outward, if holding the thickness d in region relative to the thickness d in center side region ' blocked up, then deposit the change near grips after the stretch
The tendency that deformation is big.It addition, the thickness d holding region of above-mentioned film 16 is preferably 16～40 μm, more preferably 18～32 μm.Separately
Outward, the thickness d in the center side region of above-mentioned film 16 ' it is preferably 8～36 μm, more preferably 10～24 μm.
It addition, manufacture the as above thickness d thickness d than center side region holding region ' method of thick film do not has
It is particularly limited to.As long as being formed with such film in above-mentioned formation process.Such as, if by solution casting film method
In the case of forming film, then use the slit (ejection adjusted along casting width direction (width of ejiction opening) ejection rubber cement
Mouthful) the bolt curtain coating mould side by side of gap width, for the gap width of its slit, significantly extending width compared with central part
It is cast rubber cement under the state of the end in degree direction and forms film, thus can obtain holding the thickness d in region than center side region
Thickness d ' thick film.
It addition, above-mentioned stretching process is not only as above along the situation of TD direction stretching, it is also possible to for tilting the situation of stretching.
Specifically, can enumerate: the both side ends of the width using multiple grips to hold above-mentioned film carries, on one side
Maintain gripping state while changing the stretching process etc. of conveying direction.By as above changing conveying direction, make the above-mentioned film of holding
Multiple 3rd grips and the holding of the one end holding above-mentioned film in multiple grips of the both side ends of width are above-mentioned
The displacement of the 4th grips of the other end of film is different.By doing so it is possible, by above-mentioned film along being big relative to width
In 0 ° and carry out tilting stretching less than the direction of 90 °.As above-mentioned stretching process, it is also possible to tilt stretching for such carrying out
Operation.If such stretching process, then film the most suitably can be stretched, when this inclination stretches, can be fully
The generation of suppression albefaction.
The manufacture device of the resin molding that Fig. 4 employs the manufacture method of resin molding in present embodiment by expression is had
The skeleton diagram of other example of standby stretching device.The film in direction is controlled by the deflector roll 41 of stenter entrance side
16, the film in outside keeps starting point 42-1, the film of inner side keeps the position of starting point 42-2 to be supported by grips (fixture), uses
Tilt stretching machine 43 along the track 44-1 of the film holding means in outside, the film holding means of inner side track 44-2 shown in
Incline direction conveying, stretching, keep the release of end point 45-2 to hold by film holding end point 45-1 in outside, the film of inner side,
Control conveying by the deflector roll 46 of tenter outlet side and formed and tilt the film 16 stretched.That is, film 16 is relative to the feeding of film
Direction 51, carries out tilting stretching with the angle (angle of orientation θ 2) of the draw direction 52 of film.With this θ 2 side more than 0 ° and less than 90 °
Formula stretches.
Drying device 17 possesses multiple conveying roller, makes film be dried between this roller during transport membrane.Now, as it is shown in figure 1, permissible
Circulate in drying device 17 be dried by making to add hot-air 18, it is possible to use infrared ray etc. be dried or,
Can also and with adding hot-air and infrared ray is dried.From the standpoint of simplicity, it is preferably used and adds hot-air.
The film F becoming the residual solvent rate of regulation in drying device 17 is wound in core by coiler device 19.Additionally, it is preferred that
Utilized heat embossing mechanism that the width both ends of film are implemented embossing processing before film F is wound in core.It addition, in order to
Scratch, winding that shrinking after preventing because of winding produces relax, and temperature during winding is preferably cooled to room temperature.The winding used
Device can be without using with being particularly limited to, the coiler device typically used, and can pass through constant tension method, constant-torque
The method for winding such as the program tension control method that method, taper tension method, internal stress are constant are wound.
It addition, the manufacture device of resin molding can also possess to cut off before wind resin molding with coiler device 19 removes film
The shearing device of the end of 16.By as above cutting off removing end, being held by grips in above-mentioned stretching process can be removed
Part.Now, if the manufacture method of the resin molding of present embodiment, then can suppress grips periphery produce albefaction, therefore, can
Only cut off the part etc. deformed because of grips, reduce and cut off the part removed.Specifically, the width side away from film is preferably cut off
To the position of front end 4.5cm.By doing so it is possible, the part deformed because of grips can be removed.Alternatively, it is also possible to winding
After device 19 winding, remove end to use resin molding to cut off when extracting resin molding out as product.
As long as it addition, the manufacture method manufacturing the resin molding that device can implement present embodiment of resin molding is the most special
Limit.Specifically, the manufacture device of resin molding can not possess stretching device or drying device, alternatively, it is also possible to be not point
Respectively possess 1, but respectively possess multiple.
It addition, resin molding manufacture device in the scheme of described above exemplified with possessing endless belt supporting mass as supporting
The device of body but it also may for possessing the device of idler body.Specifically, except possess idler body replace endless belt prop up
Hold beyond body 11, the manufacture device etc. manufacturing resin molding as device with the resin molding shown in Fig. 1 can also be enumerated.Separately
Outward, as idler body, such as, the rotation driving rolling that surface is implemented the stainless steel that hard chrome plating processes can be enumerated
Cylinder etc..
Hereinafter, the composition of the resin solution (rubber cement) used in present embodiment is illustrated.
The resin solution (rubber cement) used in present embodiment makes transparent resins be dissolved in solvent and obtain.
As long as above-mentioned transparent resins for having the transparency when being configured to substrate shape by solution casting film method etc.
Resin, is not particularly limited, but preferably manufactures easily by solution casting film method etc.；With other the function such as hard conating
Layer excellent in adhesion；Optical isotropy.It addition, refer to that the transmitance of visible ray is more than 60%, preferably in this transparency
It is more than 80%, more preferably more than 90%.
As above-mentioned transparent resins, specifically, such as can enumerate: cellulose diacetate resin, tri acetic acid fiber
The cellulose esters system resins such as element resin, cellulose acetate-butyrate resin, cellulose-acetate propionate resin；Poly terephthalic acid second two
The polyester based resins such as alcohol ester resin, PEN resin；The acrylic acid series trees such as plexiglass
Fat；Polysulfones (also comprising 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
(comprising polyether sulfone) is resin.Further preferably cellulose esters system resin, in cellulose esters system resin, preferably 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.It addition, above-mentioned transparent resins can be used alone foregoing illustrative
Transparent resins, it is also possible to be applied in combination two or more.
Then, above-mentioned cellulose esters system resin is illustrated.
Mechanical strength in time being shaped to resin molding by force and becomes the cement viscosity of appropriateness solution casting film method
From the standpoint of, the number-average molecular weight of cellulose esters system resin is preferably 30000～200000.It 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.
It addition, the mean molecule quantity of the resins such as cellulose esters system resin and molecular weight distribution can use gel permeation chromatography
Or high effective liquid chromatography for measuring.Therefore, it is possible to use they calculate several mean molecule quantity (Mn), weight average molecular weight (Mw) and count
Calculate its ratio.
Cellulose esters system resin preferably has the acyl group alternatively base that acyl group, specifically carbon number are 2～4.
As the substitution value of this acyl group, the most preferably 2.2～2.95.It addition, as its substitution value, such as by the substitution value of acetyl group
Being set to the substitution value of X, propiono or bytyry when being set to Y, the aggregate value of preferably X and Y is more than 2.2 and less than 2.95, i.e. X is big
In 0 and be less than 2.95.
It addition, the part not replaced by acyl group is generally presented in hydroxyl.These cellulose esters system resins can pass through
Known method synthesis.The assay method of the substitution value of acyl group can be measured according to the regulation of ASTM-D817-96.
It is molten that solvent used in present embodiment can use containing relative to the good solvent of above-mentioned transparent resins
Agent.Above-mentioned good solvent is different according to the transparent resins used.Such as, when transparent resins is cellulose esters system resin, good
Solvent and poor solvent change according to the acyl substitution of cellulose esters, such as when using acetone as solvent, at fibre
Dimension the element acetas (degree of substitution with acetyl group 2.4) of ester, cellulose-acetate propionate become good solvent, at the acetas of cellulose
(degree of substitution with acetyl group 2.8) becomes poor solvent.Therefore, good solvent and poor solvent are according to the transparent resins used not
With, accordingly, as an example, the situation of cellulose esters system resin is illustrated.
As the good solvent relative to cellulose esters system resin, such as, can enumerate the organic halogen chemical combination such as dichloromethane
Thing, methyl acetate, ethyl acetate, pentyl acetate, acetone, oxolane, 1,3-dioxolanes, 1,4-dioxane, dioxolanes
Derivant, Ketohexamethylene, Methylethyl, 2,2,2 tfifluoroethyl alcohol, 2,2,3,3-hexafluoro-1-propanol, 1,3-bis-fluoro-2-propanol, 1,
1,1,3,3,3-hexafluoro-2-methyl-2-propanol, 1,1,1,3,3,3-hexafluoro-2-propanol, 2,2,3,3,3-five fluoro-1-propanol, nitre
Base ethane etc..In these good solvents, preferably organohalogen compound, dioxolane derivatives, methyl acetate, the second such as dichloromethane
Acetoacetic ester, acetone etc..In these good solvents, preferably dichloromethane.These good solvents may be used alone, can also be used in combination
Two or more.
Alternatively, it is also possible to containing poor solvent in rubber cement in the range of transparent resins will not separate out.As relatively
In the poor solvent of cellulose esters system resin, such as can enumerate methanol, ethanol, normal propyl alcohol, isopropanol, n-butyl alcohol, sec-butyl alcohol,
The alcohol of the carbon numbers such as the tert-butyl alcohol 1～8, methyl ethyl ketone, methyl iso-butyl ketone (MIBK), propyl acetate, monochlorobenzene, benzene, hexamethylene, four
Hydrogen furan, methyl cellosolve, glycol monoethyl ether etc..In these poor solvents, preferred alcohol.These poor solvents can be independent
Use, it is also possible to be applied in combination two or more.
It addition, the resin solution used in present embodiment can also contain in the range of the effect not hindering the present invention
There is other the composition (additive) beyond above-mentioned transparent resins and above-mentioned solvent.As above-mentioned additive, such as, can lift
Go out microgranule, plasticizer, antioxidant, UV absorbent, thermally-stabilised agent, conductive material, fire retardant, lubricant and delustring
Agent etc..
Then, as an example of the method preparing rubber cement, to using cellulose esters system resin as transparent resins
Situation illustrate.
As the dissolving method of cellulose esters system resin when preparing rubber cement, it is not particularly limited, it is possible to use general
Method.From the standpoint of preventing gel or being referred to as the generation of the undissolved thing of bulk of agglomerate, preferably by can be by combination
More than more than heating and the boiling point of solvent that is heated under normal pressure boiling point at ambient pressure make cellulose esters system resin
It is dissolved in solvent.Additionally, it also may be preferable for use after cellulose esters system resin mixed with poor solvent making it moisten or be swelling, enter
The method that one step is added good solvent and dissolved.
Then, the solution of the cellulose esters system resin that the suitable filtering material such as filter paper is filtrated to get is used.
By the manufacture method of the resin molding of present embodiment as above, the generation of albefaction can be suppressed, can make for a long time
Make the resin molding that the generation of albefaction is inhibited.It addition, the preferably fabricated acetic acid of the manufacture method of the resin molding of present embodiment is fine
Dimension element film is as resin molding.By doing so it is possible, the generation of albefaction can be suppressed and manufactures the cellulose acetate that is applicable to blooming etc.
Film.Therefore, the blooming of high-quality can be manufactured for a long time.
It addition, the thickness of above-mentioned resin molding (thickness) is preferably 5～25 μm.If such thickness, then from liquid crystal display
From the standpoint of the slimming of device or the steady production rate of resin molding etc. preferably.It addition, thickness in this refers to average film thickness.Make
For this assay method, such as, utilize the contact film thickness gauge of Mitutoyo Corp, blooming width measure 20～
Thickness at 200, calculates the meansigma methods of its measured value as thickness.It addition, from the use large-scale liquid crystal indicator, partially
From the standpoint of the sheet that shakes adds the service efficiency of the resin molding in man-hour, production efficiency, the width of the resin molding obtained at this is preferably
1000～4000mm.
(polaroid)
The resin molding obtained by the manufacture method of the resin molding of present embodiment can be used as the protecting film of polaroid.
Resin molding as used above as the polaroid of protecting film possess polarizer and be arranged on the surface of above-mentioned polarizer saturating
Bright protecting film, above-mentioned transparent protective film is above-mentioned resin molding.Above-mentioned polarizer is incident illumination to be become polarized light and penetrates
Optical element.
As above-mentioned polaroid, the most preferably making by polyvinyl alcohol mesentery being impregnated in iodine solution and stretch
Polarizer at least one surface use fully saponified type polyvinyl alcohol water solution fit above-mentioned resin molding polaroid.
It addition, can also the above-mentioned resin molding of stacking on another surface of above-mentioned polarizer, it is also possible to other polaroid of stacking
Transparent protective film.
Above-mentioned polaroid above-mentioned resin molding used as discussed above is as the guarantor of at least one face side being laminated in polarizer
Cuticula.Now, when above-mentioned resin molding plays a role as phase retardation film, preferably with slow axis and the suction of polarizer of resin molding
The mode receiving axle substantial parallel or orthogonal configures.
Such polaroid uses the resin molding of present embodiment as transparent protective film.Even if this resin molding is thin is also high
Quality.Therefore, even if the polaroid obtained is the thinnest also for high-quality.Therefore, the polaroid obtained such as is being applied to liquid crystal
During showing device, the higher image quality of liquid crystal indicator can be realized.
(liquid crystal indicator)
It addition, above-mentioned resin molding or above-mentioned polaroid can be used for liquid crystal indicator.Specifically, above-mentioned polaroid can be made
Polaroid for liquid crystal indicator uses.The liquid crystal indicator possessing above-mentioned polaroid possesses liquid crystal cells and with in clamping
Stating 2 polaroids that the mode of liquid crystal cells configures, at least one in above-mentioned 2 polaroids is above-mentioned polaroid.It addition, liquid
Brilliant unit is filled with liquid crystal material between pair of electrodes, by this electrode is applied voltage, can change the state of orientation of liquid crystal, control
System is through light quantity.Such liquid crystal indicator uses above-mentioned polaroid as the transparent protective film of polaroid.By so
Do, the liquid crystal indicator of the high image quality that available contrast etc. is improved.
Main technology, as it has been described above, disclose the technology of various scheme, is summarized as follows by this specification.
An aspect of of the present present invention is the manufacture method of a kind of resin molding, it possess supply strip film supply step and
Described film is carried while stretching described film by multiple grips of the both side ends of the width having held described film
Stretching process, wherein, described film with described grips hold hold region thickness d be 0.012～0.045mm, and,
With the position that the front end of width of described film and the part clamped by described grips of described film are farthest from described front end
Between distance L meet following formula (1) the described grips of mode hold described film.
2.5mm≤L≤(1200×d-10.5)mm(1)
By such composition, it is possible to provide a kind of fully inhibit the resin molding of film issuable albefaction when stretching
Manufacture method.The thickness holding region held by grips of the film in manufacture is 0.012～0.045mm, finally gives
Resin molding becomes relatively thin.Even if when manufacturing such relatively thin resin molding, it is possible to make after replacing grips in grips week
The time that limit produces albefaction is elongated.Even if it addition, use the grips that in stretching process, longer-term uses, it is possible to be adequately suppressed
The albefaction that grips periphery produces.According to these situations, the issuable albefaction of film when stretching can be adequately suppressed.
It addition, in the manufacture method of above-mentioned resin molding, above-mentioned film comprises above-mentioned holding region and than above-mentioned holding region
More leaning on the center side region of the center side of the width of above-mentioned film, the thickness in above-mentioned holding region is preferably than above-mentioned central authorities lateral areas
Thick 4～28 μm in territory.
By such composition, film issuable albefaction when can suppress further to stretch.That is, by making film as mentioned above
Held by grips hold region than the most more thickening by the region of center side, the product of albefaction can be suppressed further
Raw.Even if it addition, when manufacturing relatively thin resin molding, by adding the holding region that thick quilt grips is held, albefaction can be suppressed
Generation.According to these situations, even if when manufacturing relatively thin resin molding, it is possible to being adequately suppressed the film when stretching may produce
Albefaction.
It addition, in the manufacture method of above-mentioned resin molding, above-mentioned stretching process is preferably following operation: use multiple grips
Hold the both side ends of the width of above-mentioned film, and above-mentioned grips moves and above-mentioned along making along the length direction of above-mentioned film
Multiple 1st grips of the one end keeping above-mentioned film in grips and the 2nd grips of the other end of the above-mentioned film of holding
The direction that gradually extends at the width of above-mentioned film of distance move.
By such composition, can suitably stretch along the width of film, when it stretches, can fully suppress albefaction
Produce.
It addition, in the manufacture method of above-mentioned resin molding, above-mentioned stretching process can also be following operation: with multiple
Grips holds the both side ends of the width of described film while carrying, and maintains gripping state to change conveying side
To, thus make the width of the described film of holding both side ends multiple grips in hold described film one end many
Individual 3rd grips is different with the displacement of the 4th grips of the other end holding described film, by described film along relative to width
Degree direction is that the direction more than 0 ° and less than 90 ° carries out tilting stretching.
By such composition, film the most suitably can be stretched, when this inclination stretches, can be adequately suppressed
The generation of albefaction.
It addition, in the manufacture method of above-mentioned resin molding, above-mentioned supply step is preferably provided with containing transparent resins
Resin solution by be cast mould be cast to movement supporting mass and formed casting films curtain coating operation and from above-mentioned supporting mass peel off
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.Thus, can be continuously manufactured by inhibiting white
The resin molding of the generation changed.
It addition, in the manufacture method of above-mentioned resin molding, above-mentioned stretching process makes while preferably making the stretching of above-mentioned film
The operation that above-mentioned film is dried.
If such composition, then make it stretch in the operation making film be dried, therefore, can effectively manufacture resin molding.
If it addition, make the operation making film be dried while film stretching, the most generally speaking film easily produces albefaction.If the one of the present invention
The manufacture method of the resin molding of aspect, even if being then such operation, it is possible to be adequately suppressed the generation of albefaction.Therefore, can have
Effect ground manufactures the resin molding of the generation inhibiting albefaction.
It addition, in the manufacture method of above-mentioned resin molding, above-mentioned film is preferably cellulose ester membrane.
If such composition, the generation of albefaction can be suppressed to manufacture the cellulose esters being suitable as blooming
Film.
It addition, above-mentioned distance L in the manufacture method of above-mentioned resin molding, in the grips of the one end holding above-mentioned film
Can be identical with above-mentioned distance L in the grips of the other end keeping above-mentioned film, it is also possible to different.It addition, additionally, it is possible to
Above-mentioned distance is changed a side and the opposing party with the state according to grips.For example, it is possible to used according to stretching process
Period changes above-mentioned distance.
Pass through the present invention, it is possible to provide a kind of suppressed sufficiently the system of resin molding of the issuable albefaction of film when stretching
Make method.
Hereinafter, enumerate embodiment and the present invention is specifically described, but the present invention is not limited to these embodiments.
[embodiment]
[embodiment 1～11, comparative example 1～3]
(preparation of rubber cement)
First, add as the transparency in the dissolving tank being placed with dichloromethane 418 mass parts and ethanol 23 mass parts
Cellulose triacetate resin (substitution value 2.88 of acetyl group) 100 mass parts of resin, then add triphenyl phosphate 8 mass parts,
Ethyl phthalyl 2 mass parts, Tinuvin 326 (BASF Amada Co., Ltd. system) 1 mass parts and
Aerosil 200V (Aerosil Co., Ltd. of Japan system) 0.1 mass parts.Then so that it is heat up after becoming 80 DEG C until liquid temperature,
Stir 3 hours.By so, obtain resin solution.Then, terminate stirring, place until liquid temperature becomes 43 DEG C.Then, use
Resin solution after the filter paper filtering placement of filtering accuracy 0.005mm.Place a night by the resin solution after filtering, make tree
Bubble deaeration in lipoprotein solution.The resin solution as above obtained is used to manufacture resin molding as follows as rubber cement.
(manufacture of resin molding)
First, the temperature of the rubber cement obtained is adjusted to 35 DEG C, the temperature of endless belt supporting mass is adjusted to 20 DEG C.So
After, the manufacture device of use resin molding as shown in Figure 1, adjust the slit separation of ejiction opening of curtain coating mould with film during stretching
Thickness be that the mode that width is 1160mm of film when the thickness shown in table 1 and table 2, stretching manufactures film.
First, by curtain coating mould (coat hanger die) curtain coating rubber cement on the supporting mass of endless belt.It addition, as endless belt supporting mass,
Use by stainless steel (SUS316 system) and the 3-dimensional surface that is polished to utilize sweep type atomic force microscope (AFM) to obtain 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 drying machine on supporting side, endless belt net on the supporting mass of endless belt the dry wind of 30 DEG C is sent, thus
Net is made to be dried.This net being dried is peeled off from the supporting mass of endless belt in membrane form.By the film peeled off while with conveying
Roller conveying is while being dried until residual solvent rate is 80 mass %.
The film being dried for this, uses stretching device (stenter) to hold film with fixture in the environment of 140 DEG C
TD direction, edge, two ends one stretching 22% after, release clip.
It addition, the holding position of the film as fixture, with the front end of the width of film and film by the portion of holder
Separate the distance L (end from the width central part side of the film by the part of holder of film of farthest position, front end
Distance L of front end of width to film) the mode fixture that becomes the L shown in table 1 below and table 2 holds film.
Then, the film coiler device winding that will be dried, thus can obtain being wound into the resin molding of roll.
[evaluating (albefaction)]
Evaluate the resin molding obtained as follows.
After being new product as the clamp-replacing of grips, it is 2100 little constantly with 2800 hours for measuring and utilizing the use time
Fixture and the mist degree of resin molding that obtains.As measurement site, measure the width of the resin molding before cutting off end
The position of front end 4.5cm and at different 10 points of length direction.As condition determination, 23 DEG C, use mist under 55%RH environment
Degree instrument (NDH2000 that Japan's electricity color industry (strain) makes) measures.The results are shown in table 1.
It addition, exist because of with fixture than the front end 4.5cm more front away from the width cutting off the resin molding before end
The deformation of the film caused by holding.Therefore, how by this partial cut.If it addition, mist degree is more than 0.6%, then it is not suitable as partially
Shake the transparent protective film of sheet.According to these situations, if above-mentioned mist degree is more than 0.6%, then need cut off removing create because of
More than the part with the deformation of the film caused by fixture holding.
Table 1
Table 2
From table 1 and table 2, even if at the film that thickness is 0.012～0.045mm holding region using fixture to hold
During stretching, as the position with fixture holding film, distance L meets the situation (embodiment 1～11) of above-mentioned formula (1), with distance L not
The situation (comparative example 1～4) meeting above-mentioned formula (1) is compared, and can suppress the generation of albefaction.
It addition, understand the thickness holding region held with fixture to be thicker than ratio holding region more by the central lateral areas of center side
Compared with the situation (embodiment 1～4) that the situation (embodiment 5～11) in territory is identical with the thickness in holding region and center side region,
The generation of albefaction can be suppressed.And then, it is known that the difference of its thickness is that the situation (embodiment 5～8) of 4～28mm is less than with the difference of thickness
The situation (embodiment 9～11) of 4mm is compared, and can further suppress the generation of albefaction.
This application on the basis of Japanese patent application Japanese Patent Application filed in 16 days June in 2015 2015-120989, its
Content comprises in this application.
In order to state the present invention, while referring to the drawings, adequately and sufficiently illustrate this by embodiment above
Bright, but if those skilled in the art, then should be realized that change and/or person improve above-mentioned embodiment is to be easily able to
's.Therefore, those skilled in the art implement change mode or mode of ameliorating are without departing from described in claims
The interest field of claim, then be construed to this change mode or this mode of ameliorating is included in the interest field of this claim
In.
Industrial utilizability
Pass through the present invention, it is possible to provide a kind of manufacture of the resin molding of film issuable albefaction when suppressed sufficiently stretching
Method.
Claims (8)
1. the manufacture method of a resin molding, it is characterised in that possess:
Supply step, the film of supply strip, and
Stretching process, by multiple grips of the both side ends having held described film width, carries described film
Stretch described film；
Wherein, the thickness d holding region held by described grips of described film is 0.012～0.045mm,
Further, with the part clamped by described grips of the front end of the width of described film and described film from described front end
Farthest distance L between position meets the described grips of mode of following formula (1) and holds described film,
2.5mm≤L≤(1200×d-10.5)mm (1)。
The manufacture method of resin molding the most according to claim 1, wherein, described film comprises described holding region and ratio is described
The center side region of the center side of the width of described film is more leaned in holding region,
The thickness in described holding region is than described center side region thick 4～28 μm.
The manufacture method of resin molding the most according to claim 1, wherein, described stretching process is following operation: use
Multiple grips hold the both side ends of the width of described film, make described grips along the length direction shifting of described film
Dynamic and edge makes multiple 1st grips of the one end holding described film in described grips and the other end holding described film
The direction that gradually expands at the width of described film of the distance of the 2nd grips move.
The manufacture method of resin molding the most according to claim 1, wherein, described stretching process is following operation: use
Multiple grips hold the both side ends of the width of described film while carrying, and maintain gripping state to change conveying
Direction, so that the one end holding described film held in multiple grips of the both side ends of the width of described film
Multiple 3rd grips are different with the displacement of the 4th grips of the other end holding described film, by described film edge relative to
Width is that the direction more than 0 ° and less than 90 ° carries out tilting stretching.
The manufacture method of resin molding the most according to claim 1, wherein, described supply step possesses:
Curtain coating operation, is cast on the supporting mass of movement be formed curtain coating by the resin solution containing transparent resins by being cast mould
Film, and
Stripping process, peels off described casting films from described supporting mass and obtains described film.
The manufacture method of resin molding the most according to claim 1, wherein, described stretching process for make described film stretching and
Make the operation that described film is dried.
The manufacture method of resin molding the most according to claim 1, wherein, described film is cellulose ester membrane.
The manufacture method of resin molding the most according to claim 1, wherein, holds the institute of the grips of the one end of described film
State distance L different with described distance L of the grips of the other end holding described film.
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 true CN106256525A (en) | 2016-12-28 |
| CN106256525B 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) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI780244B (en) * | 2017-10-31 | 2022-10-11 | 日商住友化學股份有限公司 | Manufacturing method of resin film |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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2016
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- 2016-06-08 KR KR1020160070707A patent/KR20160148455A/en not_active Application Discontinuation
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| TWI780244B (en) * | 2017-10-31 | 2022-10-11 | 日商住友化學股份有限公司 | Manufacturing method of resin film |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201708090A (en) | 2017-03-01 |
| KR20160148455A (en) | 2016-12-26 |
| JP2017001367A (en) | 2017-01-05 |
| CN106256525B (en) | 2018-10-19 |
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