CN1891440A - Manufacturing method for biaxial stretched film and manufacturing equipment for biaxial stretched film - Google Patents
Manufacturing method for biaxial stretched film and manufacturing equipment for biaxial stretched film Download PDFInfo
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- CN1891440A CN1891440A CNA2006101031159A CN200610103115A CN1891440A CN 1891440 A CN1891440 A CN 1891440A CN A2006101031159 A CNA2006101031159 A CN A2006101031159A CN 200610103115 A CN200610103115 A CN 200610103115A CN 1891440 A CN1891440 A CN 1891440A
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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
- B29C55/10—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial
- B29C55/12—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial biaxial
- B29C55/16—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial biaxial simultaneously
- B29C55/165—Apparatus therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D7/00—Producing flat articles, e.g. films or sheets
- B29D7/01—Films or sheets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/712—Containers; Packaging elements or accessories, Packages
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
Abstract
In the biaxially stretched film manufacturing apparatus, an energizing device 80, which has a pair of energizing rolls 81 for energizing both end parts of the base material film 2 to the outside in the width direction of the base material film 2, is provided on the upstream side of the heat treatment device 40. The energizing rolls 81 are provided as one set composed of two rolls and has cylindrical rotary parts which hold the base material film 2 from both sides thereof to apply linear pressure to the base material film 2 and can be reversely rotated each other accompanied by the advance of the base material film 2.
Description
Technical field
The present invention relates to the manufacture method and the biaxial stretchable film manufacturing installation of biaxial stretchable film.
Background technology
In general, biaxial stretchable film is because mechanical strength and excellent heat resistance are used as so-called surface substrate in the packaging material field.Wherein, especially twin shaft extends nylon membrane, because mechanical strength and puncture resistance are excellent especially, so be widely used in the packing etc. of flexible package punch or weight.
When making such biaxial stretchable film, generally the base material film after extending is implemented heat treatment (heat fixation).By this heat treatment, the hear resistance of base material film etc. significantly improves, and becomes the biaxial stretchable film of practicality excellence.As heat treatment method, generally use the stenter mode.Particularly, the base material film two ends after with anchor clamps etc. twin shaft being extended are fixed, and it is advanced in annealing device heat-treat.
When making twin shaft extension nylon membrane, the stenter mode is generally also adopted in heat treatment.On the other hand, if the base material film former state that will utilize periosteum method mode twin shaft to extend folds, heat-treats as the film of 2 coincidences, then can cause thermal welding when heat treatment, this point is known.Therefore, the tubulose base material film after the twin shaft extension is temporarily cut, make the base material film inner surface be exposed to extraneous gas, carry out The pre-heat treatment, can make heat treatment thereafter successfully carry out (for example, document 1: the spy opens flat 2-141225 communique) thus.
; method according to document 1; though up and down 2 base material film imports in the annealing device after preheating, thereby 2 base material film staggers or base material film is difficult to import situation in the annealing device owing to the moisture in the atmosphere curls about at this moment may producing.And then, be under the situation of stenter mode at annealing device, if anchor clamps to the clamping instability of base material film end, then worry base material film because of self convergent force near anchor clamps break away from or base material film ruptures anchor clamps etc. problem.
Summary of the invention
Therefore, main purpose of the present invention is the biaxial stretchable film manufacturing installation that a kind of manufacture method of biaxial stretchable film is provided and is used for this method, and the film after it can extend twin shaft successfully import heat treatment step.
The manufacture method of biaxial stretchable film of the present invention, comprise twin shaft extension process and the heat treatment step that the base material film after the twin shaft extension is heat-treated, it is characterized in that, upstream side in the aforementioned hot treatment process has application of force operation, and described application of force operation is used the both ends of the aforementioned substrates film a pair of force application mechanism to the outside application of force of width of aforementioned base material film.
At this, a pair of force application mechanism, as long as with respect to the both ends of base material film to the outside application of force of width, for example, thereby also can be to make base material film high wind be blown on the two sides of base material film mechanism to the base material film application of force by thinner slit etc.
Manufacture method according to biaxial stretchable film of the present invention, when base material film is imported heat treatment step, has application of force operation, described application of force operation is used the both ends of base material film respectively to a pair of force application mechanism of the outside application of force of width of base material film, even, also can make base material film import to heat treatment step reliably so curl in the both ends of base material film, the lax or whole left and right sides changing of the relative positions of base material film.
Therefore, be advisable near heat treatment step in the position of this application of force operation.For example, adopt at heat treatment step under the situation of stenter mode, the position of application of force operation preferably with stenter in anchor clamps base material film sandwiched starting point in 1m, more preferably in 50cm.
In addition, in application of force operation, can exist many to above-mentioned a pair of force application mechanism.For example, if a pair of force application mechanism is multistage along the direct of travel configuration of base material film, then the effect to the base material film application of force is more excellent.
In the present invention, preferably, aforementioned force application mechanism is 2 one group a application of force roller, and described application of force roller has the cylindric rotating part that applies linear pressure and can reverse mutually along with advancing of base material film from two sides cramping aforementioned substrates film.
According to the present invention, 2 cylindric rotating parts are parallel to each other, from two sides crimping base material film.And this application of force roller of group has a pair of at the direct of travel both ends of base material film, thus application of force roller can be reliably to the both ends of base material film to the outside application of force of width.Specifically, the both ends of base material film are stretched strongly to the width outside, also can play the effect that prevents that this from curling well even curl in the both ends of base material film.For example, if annealing device is the stenter mode, then the both ends of base material film successfully can be joined anchor clamps to stenter.
In addition, the so-called dance roller that preferably rotates freely of the rotating part of this application of force roller.Along with advancing of base material film self, dance roller automatically rotates, and base material film is worked to the power that its width outside applies, and does not use on the base material film so do not have factitious masterpiece.Promptly, the corresponding to natural rotary speed of gait of march of utilization and base material film, can bring into play the application of force effect that obtains by application of force roller.
In the present invention, preferably, the linear pressure that is imposed on the aforementioned substrates film by aforementioned cylindric rotating part is 6～500gf/cm, more preferably is 50～200gf/cm.
According to the present invention, the linear pressure that is imposed on base material film by cylindric rotating part is in the set scope of 6～500gf/cm, thus very obvious to the application of force effect of base material film, and need not to worry problems such as film fracture.
In the present invention, preferably, the aforementioned substrates film by approximate horizontal sent the aforementioned hot treatment process, in aforementioned 2 one group the application of force roller, be positioned at the aforementioned substrates film upside rotating part longitudinally length L 1, with the ratio L1/L2 of the longitudinally length L 2 of the rotating part of the downside that is positioned at the aforementioned substrates film be 1～3.
At this, L1 and L2 be meant base portion (base material film end side) from rotating part to the top length of (base material film central portion side), the base portion of two rotating parts is positioned at roughly the same position mutually on above-below direction.
According to the present invention, because be positioned at base material film upside rotating part longitudinally length L 1, with the ratio L1/L2 of the longitudinally length L 2 of the rotating part of the downside that is positioned at base material film be 1～3, so in the advancing of base material film, the situation that so-called disconnected film takes place seldom.Though promptly the length of the mutual rotating part of application of force roller can be identical, under the situation that changes length, L1 (upside) is advisable than L2 (downside) is long.
If L2 (downside) is longer than L1 (upside), the rotating part end that then is positioned at the application of force roller of base material film upside may the vibration when turning round damage the base material film surface.
In addition, if this cylindric rotating part is not parallel with respect to the base material face, embed such angle but have its end with respect to base material film, then face is easy to damage, becomes the reason of fracture easily.Therefore, the longitudinally of rotating part preferably keeps 10 degree with interior angle with respect to the base material face.
In the present invention, preferably, the angle that is formed on the downstream by the width of the longitudinally of aforementioned application of force roller and aforementioned substrates film is 20 degree～70 degree.
According to the present invention because the angle that is formed by the width of the longitudinally of application of force roller and base material film is the particular ranges of 20 degree～70 degree, so can be effectively to the both ends of base material film to the outside application of force of width.If this angle less than 20 degree, then to the tensile force shortcoming of width stretching base material film, is difficult to base material film is successfully imported in the annealing device.For example, adopting under the situation of stenter mode as annealing device, base material film is easy to leave from anchor clamps.On the contrary, if this angle surpasses 70 degree, then the power of stretching base material film is strong excessively to about throughput direction, the changing of the relative positions about causing, shortcoming stability.
This angle is preferably 30 degree～60 degree, more preferably is 30～50 degree.
In addition, be under the situation of dance roller at the rotating part of application of force roller, by the conveying of base material film, itself obtains revolving force dance roller, brings into play application of force effect by its revolving force, in view of this angle initialization of this point even more important.
In the present invention, preferably, twin shaft extends to periosteum method mode.
According to the present invention, twin shaft extends when can carry out MD direction (moving direction of film) and TD direction (with the direction of the moving direction quadrature of film), so the strength balance excellence of the biaxial stretchable film that obtains on MD direction and TD direction.
Biaxial stretchable film manufacturing installation of the present invention, comprise twin shaft extension apparatus and the annealing device that the base material film after the twin shaft extension is heat-treated, it is characterized in that, upstream side at the aforementioned hot treating apparatus has force application apparatus, and described force application apparatus has a pair of force application mechanism of the both ends of aforementioned substrates film being stated the outside application of force of width of base material film respectively forward.
According to biaxial stretchable film manufacturing installation of the present invention, when base material film is imported annealing device, has force application apparatus, described force application apparatus has the both ends of base material film respectively to a pair of force application mechanism of the outside application of force of width of base material film, even, also can make base material film import to annealing device reliably so curl in the both ends of base material film, the lax or whole left and right sides changing of the relative positions of base material film.
In the present invention, preferably, aforementioned force application mechanism is 2 one group a application of force roller, and described application of force roller has the cylindric rotating part that applies linear pressure and can reverse mutually along with advancing of base material film from two sides cramping aforementioned substrates film.
According to the present invention, the rotating part of 2 one group application of force roller applies linear pressure from two sides cramping base material film.Promptly, 2 cylindric rotating parts are parallel to each other, from two sides crimping base material film.And this application of force roller of group has a pair of at the direct of travel both ends of base material film, thus application of force roller can be reliably to the both ends of base material film to the outside application of force of width.
Description of drawings
Fig. 1 is the skeleton diagram of the biaxial stretchable film manufacturing installation of embodiment of the present invention.
Fig. 2 is the side view of the anchor clamps of aforementioned embodiments.
Fig. 3 is a skeleton diagram of observing the force application apparatus of aforementioned embodiments from horizontal direction.
Fig. 4 A is the figure of the fault example of the application of force roller in the expression aforementioned embodiments.
Fig. 4 B is the figure of the fault example of the application of force roller in the expression aforementioned embodiments.
Fig. 5 observes the annealing device the aforementioned embodiments and the skeleton diagram of force application apparatus from the top.
The specific embodiment
Below, based on accompanying drawing, detailed description is used to implement the preferred implementation that the present invention is the manufacture method of biaxial stretchable film.Specifically, device and the action thereof to each operation of constituting the biaxial stretchable film manufacturing at length describes.
(overview of biaxial stretchable film manufacturing installation)
Fig. 1 is as an example of the present invention, the schematic diagram of the biaxial stretchable film manufacturing installation 100 of expression periosteum method mode.
Raw material as the biaxial stretchable film of being made by this biaxial stretchable film manufacturing installation 100 is suitable for using polypropylene (PP), polyethylene polyolefin such as (PE), polyester such as PET, PBT, the perhaps polyamide of nylon 6, nylon 66 etc. etc.Wherein, it is particularly desirable that the base material film after twin shaft is extended is easy to generate the application of polyamide of the problem of curling.
Biaxial stretchable film manufacturing installation 100 comprises: twin shaft extension apparatus (periosteum method extension apparatus) 10, will not extend blank film 1 (after, be also referred to as blank film 1) and extend; Conditioning treatment device (preheating furnace) 20 carries out preheating to extending the folding base material film 2 in back (after, also abbreviate film 2 as); Separator 30 is separated into two up and down with the film after the preheating 2; Annealing device 40 is heat-treated (heat fixation) to the film 2 after separating; Tenslator 50 during by heat treatment, applies tension force from the downstream to film 2 at film 2; Devices for taking-up 60 batches by film 2 being heat-treated the biaxial stretchable film 3 that forms (after, also abbreviate film 3 as).
The pressure that periosteum method extension apparatus 10 is used for by inner air will be extended by tubular blank film 1 twin shaft that extruder (not shown) is made, thereby makes film 2.Mechanism as this film 2 is folded and delivers to the preheating furnace 20 in downstream flatly has guide plate 11 and pinch roll 12.
Preheating furnace 20 is to be used for device that the film 2 that becomes flat form is carried out conditioning treatment.Begin more than the temperature and under low about 30 ℃ or the temperature conditions below it, this film 2 is carried out The pre-heat treatment in the contraction of film 2 than the fusing point of film 2.By this conditioning treatment, the degree of crystallization of film 2 increases, and the film of coincidence sliding each other is good.
Separator 30 comprises: guide roller 31, trimming device 32, separate roller 33A and 33B, have the roller 34A～34C of groove.
Trimming device 32 has blade 321, and cut at the both ends of the flat film 2 that will send here via guide roller 31, thereby be separated into 2 film 2A, 2B.By up and down with leaving the configuration pair of separated roller 33A, 33B, while make air between the two film 2A, the 2B that send here via guide roller 31 with its separation.The incision of this flat film 2 utilizes following mode to carry out: locate slightly in the inner part by blade 321 is positioned at than both ends, to produce a part of ear; Blade 321 is positioned on the folding line part of film 2, not produce ear.
Then, 3 roller 34A～34C that have groove by disposing successively on the direct of travel of two film 2A, 2B overlap two film 2A, 2B once more.In addition, these roller 34A～34C that have groove have implemented plating to the surface to handle the roller that obtains after implementing fluting processing.Obtain the good contact condition of film 2A, 2B and air via this groove.
The film of sending from separator 30 2 passes through force application apparatus 80 described later, is directed in the annealing device 40.
The film 2 of coincidence status (2A, 2B) is controlled both ends by the anchor clamps 41 (Fig. 2) of stenter 41, below the fusing point of the resin that constitutes film 2 and than fusing point, heat-treat (heat fixation) more than the temperature under this condition for low about 30 ℃ simultaneously, thereby obtain the biaxial stretchable film 3 (after, be also referred to as film 3) of stable physical property.
Fig. 2 is illustrated in the side view of the anchor clamps 411 that use in the stenter 41.
Tenslator 50 (Fig. 1) comprising: 2 dance roller 51A, 51B; Be positioned at the centre of 2 dance roller 51A, 51B, but the dancer roll 52 of upper and lower displacement (moving).
The film of sending from annealing device 40 3 passes out to devices for taking-up 60 through after dance roller 51A, the dancer roll 52 from dance roller 51B.
Dance roller 51A, 51B rotate freely from advancing of annealing device 40 with film with matching, but but dancer roll 52 upper and lower displacements.Therefore, if make dancer roll 52 displacement downwards, then the tension force of film 3 increases, otherwise if make dancer roll 52 displacement upward, then the tension force of film 3 descends.Promptly, the upper and lower displacement by dancer roll 52, can carry out tension force control to film 2 in the annealing device 40 internal interface heat-treated that are positioned at the upstream.
Devices for taking-up 60 comprises guide roller 61 and takers-in 62.By heat fixation film 3 through tenslators 50, be used as film 3A, 3B via guide roller 61 and batch on 2 takers-ins 62.
(overview of force application apparatus)
Fig. 3 is a skeleton diagram of observing force application apparatus 80 from horizontal direction.
The both ends that force application apparatus 80 has folding film 2 (2A, 2B) are used as force application mechanism to a pair of application of force roller 81 of the outside application of force of width respectively.In the present embodiment, the shape of this a pair of application of force roller, configuration are symmetrical.
In addition, as shown in Figure 3, application of force roller 81 respectively disposes one up and down film 2 (2A, 2B), and the application of force roller 81B of the application of force roller 81A of upside and downside becomes one group.
Application of force roller 81A constitutes and comprises that a core 811A and rotation are fixed on the cylindric rotating part 812A on the core 811A freely.Application of force roller 81B is also identical, constitutes to comprise a core 811B and cylindric rotating part 812B.The base portion 812A1 of rotating part 812A and the base portion 812B1 of rotating part 812B are in same position on above-below direction.
At this, preferably, the longitudinally length L 1 of rotating part 812A is 1～3 with the ratio L1/L2 of the longitudinally length L 2 of rotating part 812B.Though the length of rotating part 812A and rotating part 812B can be identical, under the situation that changes length, L1 is advisable than L2 is long.More preferably, L1/L2 is 1.5～2.5.
If L2 is identical with L1 length, then because the vibration when turning round and application of force roller terminal part is in contact with one another via film 2 each other is possible owing to cutter effect (edge effect) is damaged film 2 surfaces.In addition, shown in Fig. 4 A, rotating part 812B (downside) than the long situation of rotating part 812A (upside) under, the end of rotating part 812A that is positioned at the upside of film 2 also may damage film 2A surface because of the vibration in when running.For example, in Fig. 3, L2 than the long situation of 20cm under, L1 need be for about 30～60cm., in this case, the resistance that the film of carrying in annealing device 40 2 is subjected to becomes excessive.
As the material of rotating part 812B, rotating part 812A, preferably use the heat-resistant plastic of metals such as stainless steel or phenolic resins etc.Under the situation of using metal, improve durability by implement chromium plating on the surface.
In addition, as the material of rotating part 812B, rotating part 812A, from the viewpoint of durability, though both sides can be metals, a certain side is that the heat-resistant plastic softer than metal is even more ideal.Material at rotating part 812B, rotating part 812A all is under the situation of metal, if carry out running continuously for a long time, then produces fine scar on the rotating part surface, and this scar may become the reason (recess generation) that makes film 2 fractures.
In addition, heat-resistant plastic is easy damaged film 2 surfaces not, from this point, preferably are used as the material of the rotating part 812B that is positioned at film 2 downsides.
In addition, shown in Fig. 4 B, if this rotating part 812A or rotating part 812B are not parallel with respect to the surface of film 2, its end has angle φ with respect to the surface of film 2 in acute side, then is easy to damage face, becomes the reason of film fracture.
Therefore, this angle φ is preferably below 10 degree.Angle φ is more preferably below 5 degree.
In addition, these rotating parts 812A, 812B apply linear pressure from two sides cramping film 2 to it, but as linear pressure, are preferably about 6～500gf/cm.If linear pressure is less than 6gf/cm, then the curling of film 2 ends prevents that the changing of the relative positions of effect or film 2 from preventing the effect shortcoming.Film 2 is easy to break away from from anchor clamps 411.On the other hand, if linear pressure surpasses 500gf/cm, then film 2 is easy to fracture.
In addition, because rotating part 812A, 812B are so-called dance rollers, film 2 is applied linear pressure reverse rotation mutually on one side on one side so be accompanied by advancing (conveying) of film 2.
Fig. 5 is the skeleton diagram of observing force application apparatus 80, annealing device 40 and being directed to the film 2 the annealing device 40 via force application apparatus 80 from the top.Film 3 after the heat treatment is sent, is wound up on the devices for taking-up 60 (Fig. 1) from annealing device 40.
Application of force roller 81 is set the angle θ that is formed at the downstream by the width of the longitudinally of application of force roller 81 and film 2.At this, angle θ is preferably 20～70 degree.
If this angle less than 20 degree, then to the tensile force shortcoming of width stretching base material film, is difficult to base material film is successfully imported in the annealing device.For example, in the present embodiment, because use the stenter mode, so film 2 is easy to break away from from anchor clamps 411 as annealing device.On the contrary, if this angle surpasses 70 degree, then the tensile force of stretching base material film is strong excessively to about throughput direction, the changing of the relative positions about causing, shortcoming stability.
This angle θ is preferably 30～60 degree, more preferably is 30～50 degree.In addition, this application of force roller 81 can freely change the angle of horizontal direction and vertical direction.
In addition, after the both ends application of force to film 2, film 2 is sent in the annealing device 40 be advisable immediately, so this force application apparatus 80 is configured near the inlet of annealing device 40.Specifically, preferably with stenter 41 in anchor clamps 411 begin to sandwich the place of base material film in 1m, more preferably in 50cm.
According to above-mentioned embodiment, can play following effect.
(1) the biaxial stretchable film manufacturing installation 100, because have force application apparatus 80, described force application apparatus 80 has the both ends of the film 2 a pair of application of force roller 81 to the outside application of force of width of film 2, so even curl in the both ends of film 2, the lax or film 2 whole left and right sides changing of the relative positions, also can make the heat treatment step in the annealing device 40 stable, for a long time the progressive forming biaxial stretchable film.
(2) rotating part 812A, the 812B of application of force roller 81 are the so-called dance rollers that rotate freely, along with advancing of film 2 self, rotating part 812A, 812B automatically rotate, and film 2 is worked to the power that its width outside applies, and do not use on the film 2 so do not have factitious masterpiece.Promptly, the corresponding to natural rotary speed of gait of march of utilization and film 2, can bring into play and obtain 81 application of force effect by application of force roller.
(4) because the angle in the downstream that is formed by the width of the longitudinally of application of force roller 81 and film 2 is the particular ranges that θ is in 20 degree～70 degree, thus can be effectively to the both ends of film 2 to the width outside application of force.
(5) linear pressure that imposes on film 2 is in the set scope of 6～500gf/cm, thus very obvious to the application of force effect of film 2, and need not to worry the problem of film fracture etc.
(6) because be positioned at base material film 2 upside rotating part 812A longitudinally length L 1, with the ratio of the longitudinally length L 2 of the rotating part 812B of the downside that is positioned at base material film 2 be 1～3, so in the advancing of base material film, the situation that so-called disconnected film takes place is seldom.
(7) because being positioned at the anchor clamps 411 of stenter 41, the position of force application apparatus 80 begins to sandwich near sandwiching the starting point of base material film, so can easily give full play to the application of force effect of force application apparatus 80.
Though it is open in above-mentioned record to be used for implementing preferred formation of the present invention etc., the invention is not restricted to this.Though the present invention mainly is illustrated specific embodiment; but under the situation that does not break away from technological thought of the present invention and protection domain, those skilled in the art can to the material in the aforesaid embodiment, structure, and other detailed structure carry out all distortion.
Therefore, the above-mentioned disclosed record that defines material, structure only exemplifies in order to understand the present invention easily, the invention is not restricted to this, and the record that the title outside limiting with part or all of the qualification of these structures etc. is carried out is also included among the present invention.
For example, in the present embodiment, force application apparatus 80 is made of a pair of application of force roller 81 (2 group), but also can dispose two pairs, three pairs or above application of force roller.
In addition, in the present embodiment, a pair of application of force roller 81 still not necessarily must left-right symmetry with respect to the throughput direction left-right symmetry of film 2.If the character of film is asymmetric with respect to the throughput direction left and right sides, then the shape of application of force roller is different about also can be correspondingly.
It is cylindraceous that rotating part 812A, the 812B of application of force roller 81 not necessarily need, and also can be for example coniform, circular cone shape.
In addition, in the present embodiment, adopt periosteum method mode as the twin shaft extension method, but can be the stenter mode.And then as extension method, the while twin shaft extends or the twin shaft extension can one by one.
And then, in the present embodiment, use hot-blast stove, but also can adopt known mode of heatings such as infrared ray heating or roller heating as annealing device 40.
Embodiment
Then, the present invention will be described in more detail according to embodiment and comparative example.But the present invention is not subjected to the qualification of these examples.In addition, as shared parts such as devices, use and the identical Reference numeral of Reference numeral in the embodiment.
(embodiment 1)
In aforesaid embodiment (Fig. 1, Fig. 5), set concrete condition and produced twin shaft and extend nylon membrane 3.
As the crystalline thermoplastic resin, use polyamide-based nylon 6 (relative viscosity 3.7), after melt extruding from the annular die of diameter 60mm, chilling in 15 ℃ cooling water makes the blank film 1 (tubulose nylon membrane, shrink 45 ℃ of temperature of beginning, 215 ℃ of fusing points) of diameter 90mm, thickness 120 μ m.In periosteum method extension apparatus 10, use infrared heater that this blank film 1 is heated,, obtain the film 2 of thickness 15 μ m with the condition twin shaft extension simultaneously of extension ratio MD (moving direction of film)/TD (orthogonal direction)=3.0/3.2.
Then, this film 2 is supplied to guide plate 11 continuously fold, obtain flat tubular film 2 thus with pinch roll 12.
Then, the film 2 that this is flat is sent in the conditioning treatment device (preheating furnace) 20, at this, film 2 is carried out preheating with 170 ℃, carries out preliminary treatment in advance.In the inside of preheating furnace 20, the anchor clamps 411 of controlling the end of film 2 about disposing and advancing.
Then, with the trimming device 32 that belongs to separator 30 both ends of flat film 2 are cut, and after being separated into 2 film 2A, 2B, these 2A, 2B are separated with separate roller 33A, 33B, its inner surface is contacted with air, it is overlapped once more by the roller 34A～34C that has groove.Then, the force application apparatus 80 via having each parameter of aftermentioned imports to film 2A, 2B in the annealing device 40 with 80m/min.
In annealing device, by the stenter 41 that have anchor clamps 411 control the both ends of film 2A, 2B on one side, heat-treat (heat fixation) with 210 ℃ on one side, obtain twin shaft and extend nylon membrane 3 (film 3A, 3B).
Then, the progressive forming time in the heat treatment (manufacturing of film 3) of film 2 is measured.Specifically, to moment of becoming stable from batching of 60 pairs of films 2 of devices for taking-up, to because of film 2,3 breaks away from or the fracture of film 2,3 is measured the time till the manufacturing of biaxial stretchable film stops from anchor clamps 411, as the progressive forming time.
At this, as described below about each parameter of force application apparatus 80.
The shape material of rotating part 812A:
L1=20cm, diameter 4cm, stainless steel are made (chrome-faced)
The shape material of rotating part 812B:
L2=15cm, diameter 4cm, stainless steel are made (chrome-faced)
Linear pressure T between rotating part 812A, 812B:
T＝134gf/cm
Width angulation (acute angle) θ of the longitudinally of application of force roller 81 and film 2:
θ=40 degree
The longitudinally of application of force roller 81 and horizontal plane (surface of film 2) angulation (acute angle) φ:
φ=0 degree (application of force roller 81A, 81B are)
In table 1, show the parameter and the progressive forming time of the force application apparatus 80 that uses in embodiment 1 and embodiment described later 2～6, the comparative example 1,2.
(embodiment 2)
Except the parameter of force application apparatus 80 among the embodiment 1 being carried out following change, carry out similarly to Example 1.
The shape material of rotating part 812B:
L2=10cm, diameter 4cm, phenolic resins are made
Width angulation (acute angle) θ of the longitudinally of application of force roller 81 and film 2:
θ=20 degree
Linear pressure T between rotating part 812A, 812B:
T＝200gf/cm
(embodiment 3)
Except the parameter of force application apparatus 80 among the embodiment 1 being carried out following change, carry out similarly to Example 1.
The shape material of rotating part 812B:
L2=10cm, diameter 4cm, phenolic resins are made
Width angulation (acute angle) θ of the longitudinally of application of force roller 81 and film 2:
θ=60 degree
Linear pressure T between rotating part 812A, 812B:
T＝200gf/cm
(embodiment 4)
Except the parameter of force application apparatus 80 among the embodiment 1 being carried out following change, carry out similarly to Example 1.
The shape material of rotating part 812B:
L2=10cm, diameter 4cm, phenolic resins are made
Linear pressure T between rotating part 812A, 812B:
T＝200gf/cm
(embodiment 5)
Except the parameter of force application apparatus 80 among the embodiment 1 being carried out following change, carry out similarly to Example 1.
The shape material of rotating part 812B:
L2=10cm, diameter 4cm, phenolic resins are made
The longitudinally of application of force roller 81 and horizontal plane angulation (acute angle) φ:
φ=10 degree (only application of force roller 81A)
(embodiment 6)
Except the parameter of force application apparatus 80 among the embodiment 1 being carried out following change, carry out similarly to Example 1.
The shape material of rotating part 812A:
L1=10cm, diameter 5cm, stainless steel are made (chrome-faced)
The shape material of rotating part 812B:
L2=10cm, diameter 4cm, phenolic resins are made
Width angulation (acute angle) θ of the longitudinally of application of force roller 81 and film 2:
θ=30 degree
Linear pressure T between rotating part 812A, 812B:
T＝160gf/cm
(comparative example 1)
Except force application apparatus 80 is not set in embodiment 1, carry out similarly to Example 1.
(comparative example 2)
Except in embodiment 1, removing application of force roller 81A (roller of upside), carry out similarly to Example 1 from force application apparatus 80.
Table 1
| The setting of application of force roller | The angle θ of application of force roller (degree) | Rotating part length compares L1/L2 | The progressive forming time (Hr) | |
| Embodiment 1 | Have 1) | 40 | 20/15 3) | 8 |
| | Have 1) | 20 | 20/10 3) | 12 |
| | Have 1) | 60 | 20/10 3) | 15 |
| Embodiment 4 | Have 1) | 40 | 20/10 3) | 24 |
| Embodiment 5 | Have 1) | 40 | 20/10 3) | 13 |
| Embodiment 6 | Have 1) | 30 | 10/10 3) | 20 |
| Comparative example 1 | Do not have | - | - | 1.5 |
| Comparative example 2 | Have 2) | (40) | (-/15) | 2.0 |
1) at one group of application of force roller of upper and lower settings of base material film
2) only application of force roller is set at the downside of base material film
3) ratio of the rotating part length of application of force roller up and down
(result)
As table 1 and shown in Figure 3, in each embodiment, by the force application apparatus 80 (application of force roller 81) that satisfies established condition, film 2 is imported annealing device smoothly, so the film 3 after film 2 or the heat treatment etc. is difficult to rupture, the continuous formation time till stopping to the biaxial stretchable film manufacturing installation is long enough all.Promptly, application of force roller 81 is with respect to the both ends of film 2, the application of force effect (to the outside effect that stretches of width) that performance is excellent is so film 2 is successfully guided on the anchor clamps 411 of porch of annealing device 40.
On the other hand, the comparative example 1 basic application of force roller that just is not provided with, the both ends of film 2 (ear) becomes unstable, and film 2,3 is easy to break away from from the anchor clamps 411 of stenter 41, and the progressive forming time is very short.
In addition, though as comparative example 2 only the lower side at film 2 application of force roller 81B is set, the application of force effect of film 2 is also almost had no impact, the progressive forming time does not improve.
Claims (8)
1. the manufacture method of a biaxial stretchable film comprises twin shaft extension process and the heat treatment step that the base material film after the twin shaft extension is heat-treated, it is characterized in that,
Upstream side in the aforementioned hot treatment process has application of force operation, and described application of force operation is used the both ends of the aforementioned substrates film a pair of force application mechanism to the outside application of force of width of aforementioned base material film.
2. the manufacture method of biaxial stretchable film as claimed in claim 1, it is characterized in that, aforementioned force application mechanism is 2 one group a application of force roller, and described application of force roller has the cylindric rotating part that applies linear pressure and can reverse mutually along with advancing of base material film from two sides cramping aforementioned substrates film.
3. the manufacture method of biaxial stretchable film as claimed in claim 2 is characterized in that, the linear pressure that is imposed on the aforementioned substrates film by aforementioned cylindric rotating part is 6～500gf/cm.
4. as the manufacture method of claim 2 or 3 described biaxial stretchable films, it is characterized in that, the aforementioned substrates film by approximate horizontal sent the aforementioned hot treatment process, in aforementioned 2 one group the application of force roller, be positioned at the aforementioned substrates film upside rotating part longitudinally length L 1, with the ratio L1/L2 of the longitudinally length L 2 of the rotating part of the downside that is positioned at the aforementioned substrates film be 1～3.
5. as the manufacture method of claim 2 or 3 described biaxial stretchable films, it is characterized in that the angle that is formed on the downstream by the width of the longitudinally of aforementioned application of force roller and aforementioned substrates film is 20 degree～70 degree.
6. as the manufacture method of each described biaxial stretchable film of claim 1～3, it is characterized in that twin shaft extends to periosteum method mode.
7. biaxial stretchable film manufacturing installation, comprise twin shaft extension apparatus and the annealing device that the base material film after the twin shaft extension is heat-treated, it is characterized in that, upstream side at the aforementioned hot treating apparatus has force application apparatus, and described force application apparatus has the both ends of the aforementioned substrates film a pair of force application mechanism to the outside application of force of width of aforementioned base material film.
8. twin shaft as claimed in claim 7 extends manufacturing installation, it is characterized in that, aforementioned force application mechanism is 2 one group a application of force roller, and described application of force roller has the cylindric rotating part that applies linear pressure and can reverse mutually along with advancing of base material film from two sides cramping aforementioned substrates film.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005193982 | 2005-07-01 | ||
| JP2005193982A JP4724481B2 (en) | 2005-07-01 | 2005-07-01 | Biaxially stretched film manufacturing method and biaxially stretched film manufacturing apparatus |
| JP2005-193982 | 2005-07-01 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1891440A true CN1891440A (en) | 2007-01-10 |
| CN1891440B CN1891440B (en) | 2010-11-24 |
Family
ID=37596756
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006101031159A Expired - Fee Related CN1891440B (en) | 2005-07-01 | 2006-07-03 | Manufacturing method for biaxial stretched film and manufacturing equipment for biaxial stretched film |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP4724481B2 (en) |
| KR (1) | KR101213521B1 (en) |
| CN (1) | CN1891440B (en) |
| TW (1) | TWI375618B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101905819A (en) * | 2010-07-16 | 2010-12-08 | 中材科技股份有限公司 | Feeding mechanism for feeding polytetrafluoroethylene membrane into chain clamping device |
| CN102205634A (en) * | 2010-03-31 | 2011-10-05 | 尤尼吉可株式会社 | Manufacturing method of synchronous double-shaft stretching film |
| CN114654710A (en) * | 2022-05-16 | 2022-06-24 | 河南银金达新材料股份有限公司 | Stretching equipment for polymer composite multilayer material |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4496448A (en) * | 1983-10-13 | 1985-01-29 | At&T Bell Laboratories | Method for fabricating devices with DC bias-controlled reactive ion etching |
| JPS6098630U (en) * | 1983-12-13 | 1985-07-05 | 三菱重工業株式会社 | Horizontal stretching machine |
| JPH02141225A (en) * | 1988-11-24 | 1990-05-30 | Idemitsu Petrochem Co Ltd | Method and device for thermally treating crystalline thermoplastic resin film |
-
2005
- 2005-07-01 JP JP2005193982A patent/JP4724481B2/en active Active
-
2006
- 2006-06-30 KR KR1020060060349A patent/KR101213521B1/en not_active IP Right Cessation
- 2006-06-30 TW TW095124079A patent/TWI375618B/en not_active IP Right Cessation
- 2006-07-03 CN CN2006101031159A patent/CN1891440B/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102205634A (en) * | 2010-03-31 | 2011-10-05 | 尤尼吉可株式会社 | Manufacturing method of synchronous double-shaft stretching film |
| CN102205634B (en) * | 2010-03-31 | 2016-03-23 | 尤尼吉可株式会社 | The manufacture method of synchronous double-shaft stretching |
| CN101905819A (en) * | 2010-07-16 | 2010-12-08 | 中材科技股份有限公司 | Feeding mechanism for feeding polytetrafluoroethylene membrane into chain clamping device |
| CN114654710A (en) * | 2022-05-16 | 2022-06-24 | 河南银金达新材料股份有限公司 | Stretching equipment for polymer composite multilayer material |
Also Published As
| Publication number | Publication date |
|---|---|
| KR101213521B1 (en) | 2012-12-18 |
| JP4724481B2 (en) | 2011-07-13 |
| JP2007008090A (en) | 2007-01-18 |
| CN1891440B (en) | 2010-11-24 |
| TWI375618B (en) | 2012-11-01 |
| KR20070003659A (en) | 2007-01-05 |
| TW200716355A (en) | 2007-05-01 |
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