CN106458500A

CN106458500A - Film roll

Info

Publication number: CN106458500A
Application number: CN201580017562.XA
Authority: CN
Inventors: 樋口雄太; 宫本弘树
Original assignee: Kuraray Co Ltd
Current assignee: Kuraray Co Ltd
Priority date: 2014-04-07
Filing date: 2015-04-01
Publication date: 2017-02-22
Also published as: JP2019147692A; JPWO2015156184A1; JP2021011390A; CN111573426A; TW201542429A; WO2015156184A1; KR20160141710A; KR102457311B1; JP7015894B2; TWI737578B

Abstract

A film roll obtained by film (not shown) being wrapped on a cylindrical core (1), wherein the film roll has a water-absorbing member (3) on the inner wall (2) of a core (1). The film roll preferably has the water-absorbing member (3) on the inner wall (2) of both end parts (5) of the core (1), and preferably has the water-absorbing member (3) on the lower part of the inner wall (2) of the core (1); the distance from an end (4) of the core (1) to the water-absorbing member (3) is preferably 10 cm or more; and the water-absorbing member (3) preferably includes at least one type of fiber selected from the group consisting of cellulose synthetic fibers and polyester fibers.

Description

Film roll

Technical field

The present invention relates to film roll is around in the film roll obtained from core of cylindrical shape.

Background technology

Become the polyvinyl alcohol of polarisation film raw material（Hereinafter sometimes " polyvinyl alcohol " is abbreviated as " PVA "）The plastics of film etc The form of the film roll that film is generally formed with being wound in the core of cylindrical shape to be taken care of or to transport.Recently, for becoming liquid crystal display For the PVA film of the raw material of device light polarizing film, maximization with liquid crystal display it is desirable to the bigger PVA film of width, and, In order that the processability productivity ratio of light polarizing film improves, also require the longer PVA film of spooling length.Width with this PVA film Width, long paper, the weight of film roll can increase, therefore, by film roll to loading and unloading on framework, processing unit (plant), mobile when, mostly Insert the method that support stick operates using to core inner.Therefore, in order to easily insert support stick to core inner, open cylindrical shape The two ends of core and blocked without lid etc., in the state of core inner is exposed to air convey or keeping film roll chance Increase.In addition, with regard to the material of cylindric core, gradually use intensity（Flexural rigidity etc.）High metal, carbon fiber reinforced plastic, Or their composite.

However, for cold area for winter etc., film roll is never carried out air adjustment site of storage move into Carried out air adjustment processing site when, the inwall of cylindric core condenses sometimes.Especially, recently as described above Film roll weight is gradually increased, therefore, because the increase of the thermal capacity of film roll and the temperature change speed overall with its film roll together The reduction of degree, condensation becomes easier to occur.And, as described above, with film roll weight increase and gradually using metal system Core, the core of carbon fiber reinforced plastic, but be susceptible to compared with metal system, plastic core and core made of paper etc. condense.

In order to eliminate condensation trouble as described above, for example known have the side that the packaged configuration of film roll is made specific modality Method（With reference to patent documentation 1）.

Prior art literature

Patent documentation

Patent documentation 1：International Publication No. 2012/147665.

Content of the invention

Problems to be solved by the invention

However, needing using special packaged configuration in the method for patent documentation 1, therefore, even if not adopting this bag from providing The method this point that dress form also can eliminate condensation trouble is set out, also further room for improvement.

Thus, it is an object of the invention to, even if providing the inwall of cylindric core to occur also to be difficult to be condensed during condensation The film roll of impact.

Means for solving the problem

The present inventor etc. are repeated further investigation to achieve these goals, it is found that：By in cylindric core Inwall installs absorption member, even if the inwall that can become core occurs also to be difficult to by the film roll affecting that condenses during condensation, based on this Opinion repeats to study, thus completing the present invention further.

That is, the present invention relates to following technical scheme：

[1] film roll, it is around in the film roll obtained from core of cylindrical shape for film roll, and the inwall of core has absorption member；

[2] film roll according to [1], wherein, the inwall at the both ends of core has absorption member；

[3] film roll according to [1] or [2], wherein, the bottom of the inwall of core has absorption member；

[4] film roll according to any one of [1] ~ [3], wherein, from the end of core, the distance to absorption member is More than 10cm；

[5] according to the film roll any one of [1] ~ [4], wherein, absorption member comprise selected from cellulose-based synthetic fibers and At least one in polyester fiber；

[6] film roll according to any one of [1] ~ [5], it is laminated with multiple absorption member；

[7] film roll according to any one of [1] ~ [6], wherein, absorption member is fixed on the inwall of core by adhesive tape；

[8] film roll according to [7], wherein, adhesive tape is polyethylene system or polypropylene system；

[9] film roll according to any one of [1] ~ [8], wherein, core is metal system or plastics system；

[10] film roll according to any one of [1] ~ [9], wherein, the axial length of core is more than 2.5m；

[11] film roll according to any one of [1] ~ [10], wherein, film is PVA film；

[12] film roll according to any one of [1] ~ [11], wherein, quality is more than 500kg；

[13] film roll according to any one of [1] ~ [12], wherein, the length of film is 2, more than 000m.

The effect of invention

According to the present invention, even if providing the inwall of cylindric core to occur also to be difficult to by the film roll affecting that condenses during condensation.

Brief description

Fig. 1 is the skeleton diagram of the situation of an end of the core in the film roll illustrate embodiment 1（Wherein, not shown film）, （a）It is the skeleton diagram when end on observation of core,（b）Be from core axially vertical horizontal plane direction observe when general Sketch map.

Specific embodiment

Hereinafter, the present invention is described in detail for pin.

(core)

The film roll of the present invention is that film roll is around in obtained from the core of cylindrical shape.The species of this cylindric core is not particularly limited, For example metal core, plastic core, core made of paper, wooden core etc. can be included.Use metal alternatively, it is also possible to apply The compound volume morphings such as the core with the core of both plastics, using both metal and paper, the core using both plastics and paper Core.Among these, because intensity is high and significantly more plays the effect of the present invention, therefore preferably metal and/or plastic Core, even if due to affecting that Reusability is also difficult to be worn away etc., therefore, more preferably metal core.Metal and plastics The ratio shared in the gross mass of cylindric core of quality be preferably more than 50 mass %, more than more preferably 80 mass %, enter One step is preferably more than 95 mass %, particularly preferably 100 mass %.

As above-mentioned metal, such as ferrum, rustless steel, aluminum etc. can be included, can be used alone a kind among these, Can be applied in combination two or more.Among these, from the viewpoint of intensity, light weight, price etc., preferably aluminum.

In addition, as above-mentioned plastics, such as polrvinyl chloride, polyvinylidene chloride, polyester, Merlon can be included, gathers Amide, epoxy resin, polyurethane, polyureas, silicone resin etc., can be used alone among these a kind it is also possible to be applied in combination Two or more.Among these, preferably polrvinyl chloride.From the viewpoint of intensity etc., this plastics is also preferably carbon fiber-reinforced moulding The fiber-reinforced plastics such as material（FRP）.

In the present invention, even if the material at least a portion surface using cylindric core is metal and/or plastics are such Be susceptible to condense core in the case of it is also difficult to condensed affects.When therefore, using this core, can significantly more Give play to the effect of the present invention.Due to significantly more having given play to the effect of the present invention, it is therefore preferable that at least one of cylindric core Divide inner peripheral surface（It is preferably more than the 50% of inner peripheral surface area, be more preferably more than the 80% of inner peripheral surface area）Material be metal And/or plastics, the more preferably material of its whole inner peripheral surface is metal and/or plastics, the whole table of further preferably cylindric core The material in face is metal and/or plastics.

The axial length of cylindric core suitably can select according to width of the film being wound in it etc., due to significantly more sending out Shoot the effect of the present invention, therefore, this length be preferably more than 2.5m, more preferably more than 3m, more preferably 3.5m with On.The upper limit of this length is not particularly limited, and this length is, for example, below 8.5m.

The diameter of cylindric core is not particularly limited, from the viewpoint of intensity, treatability etc., its external diameter preferably 50 ~ In the range of 800mm, more preferably in the range of 80 ~ 500mm, further preferably in the range of 100 ~ 300mm, particularly preferably In the range of 150 ~ 250mm.

In addition, from the viewpoint of intensity, treatability etc., the wall thickness of cylindric core preferably in the range of 2 ~ 50mm, more Preferably in the range of 3 ~ 20mm, further preferably in the range of 4 ~ 10mm.

(film)

The species of above-mentioned film is not particularly limited, and can include such as polyethylene film, polypropylene screen, polymethylpentene film, alicyclic ring Formula olefin polymer film, polystyrene film, polycarbonate membrane, polychloroethylene film, methacrylic resin film, polyamide Film, polyethylene terephthalate film, PVA film etc., are particularly due to quality and are greatly reduced because of moisture absorption, significantly more play Go out the effect of the present invention, therefore preferably PVA film.

As the PVA constituting PVA film, it is possible to use by polyvinylesters obtained from the monomer polymerization of vinyl esters system Carry out saponification thus manufacture PVA.As vinyl esters system monomer, can include for example vinyl formate, vinyl acetate, third Vinyl acetate, vinyl valerate, vinyl laurate, stearic acid vinyl ester, vinyl benzoate, pivalic acid vinyl acetate, tertiary carbon Vinyl acetate etc., among these, preferably vinyl acetate.

The degree of polymerization constituting the PVA of PVA film is also different because of purposes of PVA film etc., preferably 500 ~ 9, in the range of 000, More preferably in the range of 1,500 ~ 7,000, further preferably in the range of 1,800 ~ 5,000, particularly preferably 2,000 ~ In the range of 3,000.It should be noted that the degree of polymerization of PVA that this specification refers to refers to according to JIS K6726-1994's The average degree of polymerization recorded and measure.

In addition, the saponification degree constituting the PVA of PVA film is also different because of purposes of PVA film etc., preferably 75 moles more than %, more It is preferably 85 moles of more than %, more preferably 95 moles more than %, particularly preferably 99 moles of more than %.It should be noted that The saponification degree of the PVA in this specification refers to that the molal quantity of the vinyl alcohol units having in PVA can changed by saponification Become the construction unit of vinyl alcohol units（It is vinyl ester units for typical case）Shared with the total mole number of this vinyl alcohol units Ratio（Mole %）.Saponification degree can measure according to the record of JIS K6726-1994.

PVA film can contain plasticizer, surfactant, dichroic dye etc. as needed.The manufacture method of PVA film does not have Have and be particularly limited to it is preferable to use the PVA film manufacturing by the known method such as solution film-forming method, melted masking method.

The thickness of film is not particularly limited, preferably in the range of 5 ~ 500 μm, more preferably in the range of 10 ~ 300 μm, Further preferably in the range of 15 ~ 100 μm.

The width of film is not particularly limited, preferably more than 2.1m, more preferably more than 2.3m, more preferably 2.6m Above, it is particularly preferably more than 3m, most preferably more than 3.3m.Using have this width film when, easy greater amount real estate Source of students from the water of condensation, but in the present invention, due to affecting of being difficult to be condensed, therefore, using having width as described above During the film of degree, can significantly more give play to the effect of the present invention.

On the other hand, when the width of film is wide, treatability reduces sometimes, and therefore, the width of film is preferably below 8m.

The length being wound in the film of cylindric core is not particularly limited, preferably 2, more than 000m, more preferably 4,000m Above, it is more preferably more than 7,000m, particularly preferably more than 11,000m.During less than 2,000m, due to the winding of film roll Start/loss that produces of the part that terminates of winding becomes the reason such as big with respect to overall ratio, sometimes uneconomic.The opposing party Face, with regard to the length limit of film, is not particularly limited, and when long, the quality of film roll, diameter become too much, in framework, processing dress When putting loading and unloading, moving, there is it and process the tendency becoming difficult, therefore, the length of film is preferably 20, below 000m.

The quality of the film roll of the present invention is preferably more than 500kg, more preferably more than 1,000kg, is more preferably 1, More than 800kg, particularly preferably more than 3,300kg.In the present invention, even its quality is bigger, be susceptible to the film roll of condensation, Also be difficult to be condensed affects.Therefore, the effect of the present invention in the case of film roll as described above, can significantly more have been given play to Really.Wherein, when the quality of film roll is excessive, treatability etc. reduces sometimes, and therefore, the quality of film roll is preferably 5, below 000kg.

(absorption member)

The film roll of the present invention has absorption member in the inwall of core.The position of the configuration absorption member of in-core wall does not especially limit Fixed, due to significantly more having given play to the effect of the present invention, the therefore inwall of the end in core for the preferred disposition.As absorption member Concrete configuration position, from the viewpoint of will not waiting in the way when mobile film roll, from distance to absorption member for the end of core （Beeline）It is preferably more than 10cm, more preferably more than 15cm.On the other hand, apart from end too remote when, exist and be difficult to pacify Tendency of dress absorption member etc., therefore, above-mentioned distance is preferably below 50cm.Absorption member is configured at the inwall of the end of core When, can only be configured at the inwall of an end of the axial direction of core, due to significantly more having given play to the effect of the present invention, therefore, Preferably the inwall in two ends of core has absorption member.

In addition, absorption member can configure circlewise in the way of continuously along the inwall side face of core, from configuration easily From the viewpoint of degree, cost reduction etc., preferably only it is configured at a part for the inwall side face of core, especially more preferably in core Wall bottom configures absorption member.

The material of absorption member is not particularly limited, as long as there is absorptive component can be with using any material. As the concrete example of the material of absorption member, cellulose-based synthetic fibers, cellulose-based natural fiber, Polyester fibre can be included Dimension etc..Among these, the problem that makes the quality of film reduce due to being difficult to occur fragment etc. of absorption member to be attached to film etc., because This, be preferably selected from least one in cellulose-based synthetic fibers and polyester fiber, and more preferably cellulose-based synthesis is fine Dimension.From the viewpoint of cheap, water absorbing properties ageing stability from absorption member etc., fiber preferably as described above Material processed, need during higher water absorbing properties etc., as absorption member further preferably using desiccant such as silica dioxide gels.

The form of absorption member is not particularly limited, from the viewpoint of processing easness, availability etc., preferably piece Shape, especially, the non-woven fabrics of more preferably lamellar.Using lamellar absorption member when, 1 can be separately configured in core Wall, from the viewpoint of guaranteeing sufficient water absorbing capacity etc., is preferably laminated multiple absorption member.Now, water suction structure to be laminated The piece number of part is not particularly limited, such as preferably more than 2, more preferably more than 3, more preferably more than 4, separately Outward, preferably less than 10.

Configuration means in the inner wall arrangement absorption member of core are not particularly limited, can include such as adhesive tape, Bonding agent, Magnet etc., due to can fully fix and being easier to dismantle, therefore, absorption member is preferably fixed by adhesive tape.

The species of above-mentioned adhesive tape is not particularly limited, and can include such as paper adhesive tape, cloth adhesive tape, film and glue Rubber alloy band, special adhesion adhesive tape etc., specifically, can exemplify cellophane tape, kraft paper adhesive tape, cloth adhesive tape, OPP adhesive tape, aluminium strip, plastic tape, polyester belt, polyethylene, polypropylene tape, polyamide tape, rubber strip or by they Combination is two or more and processes composite band obtaining etc..Among these, due to being difficult to occur fragment of adhesive tape etc. to be attached to Film and lead to the problem that the quality of film reduces etc., and water proofing property is also excellent, it is therefore preferable that viscous for polyethylene system or polypropylene Rubber alloy band.

The film roll of the present invention can be transported under its original form or be taken care of it is also possible to packed with packaging material To package body form under transported or taken care of.The purposes of the film in the film roll of the present invention is not particularly limited, according to this Invention, the impact of condensation less, be able to maintain that excellent film quality, it is therefore preferable that with acting on the manufacture blooming such as light polarizing film Initial coiled material film.

Embodiment

By the following examples etc. illustrating the present invention, but the present invention is not limited to these embodiments completely.Need Illustrate, the condensation for in-core wall that adopts in below example and comparative example, outflow from core for the condensation, in core The dust that inwall confirms and fixed each evaluation methodology of absorption member are as follows.

The condensation of in-core wall

To evaluate the situation that in-core wall produces condensation according to following benchmark.

○：Condensation is less.

×：Condensation is more.

Outflow from core for the condensation

To evaluate outflow from core for the condensation according to following benchmark.

○：Can't see condensation completely to flow out from the end of core.

×：Observe that condensation flows out from the end of core.

The dust confirming in the inwall of core

To evaluate the dust that the inwall in core confirms according to following benchmark.

○：Visually confirm less than dust.

×：Visually it is able to confirm that dust.

The stationarity of absorption member

To evaluate the stationarity to in-core wall for the absorption member according to following benchmark.

○：By fixing without moving.

×：Mobile, unstable.

[embodiment 1]

By the width 3.3m of film, 60 μm of thickness, length 12,500m PVA film（The degree of polymerization of PVA is 2,450, the saponification degree of PVA For 99.3 moles of %）It is wound in aluminum and length 3.5m, external diameter 215mm, the central part of the cylindric core of wall thickness 6mm.Thereafter, accurate Standby two by the sheet-like nonwoven cloth being formed by cellulose-based synthetic fibers（" ダストタッ Network Le " wiper, KURARAY CO., LTD. system, vertical 33cm × horizontal 33cm）Material obtained from overlapping 4, as shown in the skeleton diagram of Fig. 1, by them with bonding Adhesive tape is separately fixed at the inner wall lower at the both ends of core.It should be noted that the fixed position of non-woven fabrics is set to from each end Deviate the position of 20cm in the axial direction（It is 20cm from beeline to absorption member for the end of core）.In addition, as viscous Rubber alloy band, using the adhesive tape of polyethylene.The quality of so film roll obtained from operation is 3,600kg.

Above-mentioned film roll is taken care of more than 10 hours with less than 10 DEG C, the then atmosphere decentralization that condensation occurs more than 20 DEG C Put the stipulated time, carry out above-mentioned each evaluation.Show the result in table 1.

[embodiment 2]

In order to replace material obtained from overlapping for the sheet-like nonwoven cloth being formed by cellulose-based synthetic fibers 4, using by piece The cellulose-based natural fiber of shape（Pilus Caprae seu Oviss, vertical 30cm × horizontal 30cm）Material obtained from overlapping 2, in addition, with enforcement Example 1 equally operates and obtains film roll.With regard to this film roll, operate similarly to Example 1, carry out each evaluation.Show the result in table 1.

[embodiment 3]

Outside 12,500m is altered to 1,000m, operates similarly to Example 1 and obtain film roll except by the length of PVA film.Need It is noted that the quality of film roll is 300kg.With regard to this film roll, operate similarly to Example 1, carry out each evaluation.Result is shown In table 1.

[comparative example 1]

In addition to not using non-woven fabrics, operate similarly to Example 1 and obtain film roll.With regard to this film roll, similarly to Example 1 Operation, carries out each evaluation.Show the result in table 1.

Description of reference numerals

1. an end of the core of cylindrical shape, the 2. inwall of core, 3. absorption member, 4. an end of core, 5. core.

Claims

1. film roll, it is around in the film roll obtained from core of cylindrical shape for film roll, and the inwall of core has absorption member.

2. film roll according to claim 1, wherein, the inwall at the both ends of core has absorption member.

3. film roll according to claim 1 and 2, wherein, the bottom of the inwall of core has absorption member.

4. the film roll according to any one of claim 1 ~ 3, wherein, from the end of core, the distance to absorption member is More than 10cm.

5. the film roll according to any one of claim 1 ~ 4, wherein, absorption member comprises selected from cellulose-based synthetic fibers With at least one in polyester fiber.

6. the film roll according to any one of claim 1 ~ 5, it is laminated with multiple absorption member.

7. the film roll according to any one of claim 1 ~ 6, wherein, absorption member is fixed in core by adhesive tape Wall.

8. film roll according to claim 7, wherein, adhesive tape is polyethylene system or polypropylene system.

9. the film roll according to any one of claim 1 ~ 8, wherein, core is metal system or plastics system.

10. the film roll according to any one of claim 1 ~ 9, wherein, the axial length of core is more than 2.5m.

11. film roll according to any one of claim 1 ~ 10, wherein, film is polyvinyl alcohol film.

12. film roll according to any one of claim 1 ~ 11, wherein, quality is more than 500kg.

13. film roll according to any one of claim 1 ~ 12, wherein, the length of film is 2, more than 000m.