JP2007153268A - Cylindrical film roll - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a new cylindrical film assembly having solved problems in handling and conveyance, without providing large-scaled equipment for continuously cutting a cylindrical resin film per a tire manufacturing line and without requiring to perform the necessary cutting work on the cylindrical resin film at the same time during the actual operation of the tire manufacturing line. <P>SOLUTION: A film mainly composed of a thermoplastic resin is manufactured into a cylindrical shape and folded flat, and wound up into a roll to form a roll. Each unit of the cylindrical film is connected in a connection part, and the connection part is structured of a stitched slit part formed by practically continuing through parts S and non-through parts L straight each other. Rate of the through part S in relation to width W of the cylindrical film is set at 50-95%, and length of one non-through part is set so as to satisfy an expression 1 mm≤L≤10 mm. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to a tubular film roll.
More specifically, a cylindrical film made of a thermoplastic resin, which is originally produced by being molded into a cylindrical shape so as to exhibit a continuous length (infinite length), is a finite-length cylindrical film that is a general usage aspect thereof. The present invention relates to a novel tubular film winding body that is cut for each material unit and further processed and improved in the next process.

  In the present invention, the cylindrical film is usually a cylindrical film directly formed into a cylindrical shape using a resin molding machine, or a resin film molded into a single-layer plain square sheet or the like. A cylindrical film formed into a cylindrical shape by joining the opposite sides by an appropriate means or the like, and the cylindrical resin film according to the present invention has a resin film whose upper and lower openings (open surfaces) or It has an opening (open surface) on the left and right and is molded into a cylindrical shape. Therefore, it is different from a bag body made of a resin sheet and having an opening in only one direction, and a connected body of such bag bodies.

  The resin-made cylindrical film as used in the present invention is not particularly limited in terms of its industrial and industrial utilization methods. For example, it is used as an inner liner in the production of pneumatic tires for automobiles, electrophotography, and the like. And an intermediate transfer belt or a conveyance belt used in the image forming apparatus.

  In recent years, resin films formed into a cylindrical shape have been used as constituent materials for inner liner materials of pneumatic tires and intermediate transfer belts or conveyance belts used in image forming apparatuses in electrophotography.

  For example, when explaining in the pneumatic tire application field, the resin film formed in this cylindrical shape is disposed in the innermost layer of the pneumatic tire and plays a role of preventing damage to the rubber material. The size of the resin film formed into a cylindrical shape is one that is formed in accordance with the dimensions of the pneumatic tire in which it is used, but this cylindrical resin film is generally thin and wrinkled. The handling work as one material for tire manufacture should be very careful.

  In particular, the handleability of the plurality of tubular films after being cut out to the size of each tubular film piece having an appropriate length from a film generally manufactured as a continuous hollow tubular film is the most. It should be taken into consideration and should not hinder, inconvenience, or inconvenience in the work in the subsequent tire manufacturing process. Specifically, each piece of tubular film is easily gripped, and as much as possible, it is not wrinkled, and even if it is folded into a sheet, it is easily reproduced as a three-dimensional and complete cylinder What can be done is important.

  From such a viewpoint, conventionally, examinations have also been made on where to perform a step of separating a film produced as a continuous tubular film into individual tubular resin film pieces.

  For example, until the tire molding process, just before the tire molding process, the integral continuous cylindrical film form is maintained, and the tire molding process is performed while cutting into individual cylindrical sheet pieces just before being put into the tire molding process. Has been proposed (Patent Documents 1 and 2).

  However, in such a method, it is necessary to carry a continuous tubular film and arrange a cutting device for each tire molding line, which is not always efficient, requires space, and However, despite the fact that the tire production line is actually in operation, there is a problem that it is difficult for the tire production line to respond flexibly when a defective state such as cutting failure or wrinkle occurs.

  For such a problem, improvement of the resin-made cylindrical film itself is also studied, and optimization of self-adhesion tack (degree of sticking of the own film surface) has been proposed (Patent Document 3). ), The problem is not completely solved.

Also, from the viewpoint that it is not necessary to provide a cutting mechanism for each tire production line, when continuously producing a hollow tubular film, immediately cut into individual tubular film pieces, and after the cutting It is conceivable to stack and store many cylindrical film pieces in a simple box etc. and send them to each tire production line, but in normal cases, stacking and storing in a box etc. There are problems such as the films sticking together and the end of the film being unclear, resulting in problems such as a large amount of storage, and stacking, storing, packing, and taking out of the delicate cylindrical film. There was a problem that it had to be done manually.
JP 2001-219478 A JP 2004-167781 A JP 2005-103760 A

  In view of the above-described points, the object of the present invention is to provide a necessary cylinder without providing a large continuous cutting facility for a tubular resin film for each tire production line, that is, during operation of an actual tire production line. The present invention is intended to provide a novel aggregate of cylindrical films that eliminates the need to proceed with the cutting work on the resin film pieces in parallel and solves the problems in terms of handling and transportation.

The tubular film assembly of the present invention that achieves the above-described object has the following configuration (1).
(1) A winding body in which a film mainly composed of a thermoplastic resin is formed into a cylindrical shape, is flatly folded and wound into a roll shape, and the cylindrical film for each unit is connected at a connecting portion. The connecting portion is formed of a perforated slit portion in which the through portion S and the non-through portion L are alternately and continuously present in a straight line, and the tube A tubular film roll-up body, wherein the ratio of the penetrating part S to the width W of the film is 50% or more and 95% or less, and the length L of one non-penetrating part is 1 mm ≦ L ≦ 10 mm.

  According to the first aspect of the present invention, a cylindrical resin film is required without providing a large continuous cutting facility for the cylindrical resin film for each tire production line, that is, during operation of the actual tire production line. There is no need to proceed cutting operations into pieces in parallel, and a novel tubular film aggregate in which problems in terms of handling and transportation can be solved can be provided.

  By adopting the tubular film roll of the present invention, it is possible to simplify the supply of material members and to omit the cutting operation, so that simplification of the entire process and improvement of safety can be expected.

  Hereinafter, the rolled-up body of the tubular film of the present invention will be described in more detail with reference to the drawings.

  The tubular film roll of the present invention is a wound body in which a film comprising a thermoplastic resin as a main component is first produced in a tubular shape, folded flat, and wound into a roll, Each cylindrical film is connected at the connecting portion. “Per unit” means that when the cylindrical film is subjected to some processing as a material member of a finite length in the next step, one piece of the finite length of the tubular film, one piece That is. Further, in the tubular film winding body of the present invention, the above-described connecting portion is provided with the through portion S and the non-penetrating portion L alternately and continuously in a straight line under such a basic configuration. The perforated portion S with respect to the width W of the tubular film is 50% or more and 95% or less, and one unpenetrated portion length L is 1 mm ≦ It is configured as L ≦ 10 mm.

FIG. 1 is a schematic perspective model view for explaining a tubular film winding body of the present invention. In FIG. 1, a cylindrical film winding body 1 of the present invention is a film mainly composed of a thermoplastic resin. 2 is produced in a cylindrical shape and is folded up into a flat shape and wound up. The continuous tubular film 2 is formed by connecting the tubular film 3 per unit having a desired tubular film length l ₀ when it is used in a subsequent high-order processing step (perforated shape). It is connected by a slit portion 5 and wound up to form a continuous cylindrical film. In FIG. 1, reference numeral 4 denotes a cylindrical shape for each unit having a desired cylindrical film length l ₀ when used in a high-order processing step by cutting the connection at the connecting portion (perforated slit portion) 5. The film is shown.

  FIGS. 2 and 3 are schematic model diagrams for explaining the details of the connecting portion (perforated slit portion) 5. The connecting portion alternates the penetrating portion S and the non-penetrating portion L in a substantially linear manner. It is composed of perforated slit portions that are continuously present, and the ratio of the penetrating portion S to the full width W of the tubular film is 50% or more and 95% or less, and one non-penetrating portion length L However, it is important to be configured within the range of 1 mm ≦ L ≦ 10 mm. If the ratio of the penetrating part S and the length of the non-penetrating part L do not satisfy these relationships, the perforation will be extended when an operator or the like cuts into individual unit tubular films based on the slits. This may be undesirable because the dimensional accuracy of the tubular film may be reduced and the film may not be cut straight along the perforation.

  Specifically, if the ratio of the penetrating part S to the full width W of the tubular film is greater than 95%, the connecting part may be cut by a tensile force during winding, whereas if less than 50%, the tire In some cases, the cylindrical film material cannot be easily cut off during molding, resulting in a decrease in work efficiency. Even if it is cut off, the shape of the cut portion is disturbed, which is not preferable. From such a viewpoint, the ratio of the penetrating portion S to the full width W of the tubular film is preferably 85% or more and 95% or less. If the length L of one non-penetrating part is less than 1 mm, the connecting part may be cut by a tensile force during winding, and if it is larger than 10 mm, the tubular film material cannot be easily cut off at the time of tire molding. In some cases, the work efficiency is lowered, and even if it is cut off, the shape of the cut portion is disturbed, which is not preferable.

  In particular, the ratio of the penetrating part S to the full width W of the tubular film described above is 50% or more and 95% or less, and the length L of one non-penetrating part is in the range of 1 mm ≦ L ≦ 10 mm. According to the various knowledge of the present inventors, it is possible for the operator to pull out easily even with one hand and tear it for each cylindrical film unit.

  Moreover, in order to perform an operator's cutting | disconnection more easily and correctly, the pre-cut 6 whose penetration length E is 1 mm <= E <= 30mm is provided in the edge part of the width direction of the cylindrical film 2 Is preferred. When the penetration length E is less than 1 mm, the non-penetrating portion L is stretched at the time of cutting, and it is difficult to stabilize the shape of the cut surface. On the other hand, when E is larger than 30 mm, the pulling force generated during winding causes wrinkles from the end portion or the end portion is rolled up, so that the surface state of the tubular film is deteriorated or the end portion is folded. It is not preferable because it may be wound up in a damaged state.

  Moreover, each slit does not necessarily need to be provided on a straight line. If the cut surface can be substantially linear after cutting, each slit has a schematic model as shown in FIG. It may be engraved as a slant.

  In the present invention, the cylindrical resin film is usually manufactured as an infinite length from the discharge cap, but depending on its specific use, a certain finite length l is determined, Corresponding portions (perforated slit portions) are provided corresponding to the finite length l.

  For example, when used for an inner liner of a pneumatic tire, the length of the cylindrical resin film should correspond to the radial dimension of the inner surface of the tire, though not completely equal.

  In the present invention, when a cylindrical film folded into a flat shape is wound up as a single wound body, it may be wound up without interposing a separator between the tubular films, but in particular, interposing a separator. Can be rolled up. In particular, it is expected that the handleability will change in accordance with the storage period / standby period, its own weight, etc. as a roll-up body. This is because it may be preferable to give more careful consideration such as using the cylindrical film to prevent wrinkles and uneven loads from entering.

  In the rolled body of the cylindrical resin film of the present invention, although not particularly limited, according to the knowledge of the present inventors, the number of unit cylindrical films wound up on one wound body is 50 sheets (units). ) To about 500 (unit), and most preferably about 100 (unit) to 300 (unit). If too many sheets (units) are wound, the total weight of the wound body becomes too heavy, and the weight of the wound body may distort the shape of the wound body, causing trouble in peeling, and eventually damaging the tubular film. In some cases, the work efficiency is lowered and the work efficiency is low.

  When obtaining the rolled-up body of the tubular film of the present invention, although not particularly limited, a commercially available slitter capable of providing perforated slits for providing perforated slits in a continuous tubular film. Use a machine. The commercially available slitter machine can be used to form perforations on continuous paper.

  In the present invention, the film mainly composed of a thermoplastic resin is preferably composed of a thermoplastic elastomer composition containing a blend of a thermoplastic resin and an elastomer in order to improve the handleability. When the tire is used as an inner liner material of a tire, it is more effective to use the thermoplastic elastomer composition, and the reason for this is that the separation is particularly made by using perforated slits. This is because when the cylindrical film is prepared for each unit, it is possible to realize a state in which the inner peripheral surfaces of the cylindrical film do not stick together.

  According to the various findings of the present inventors, the self-adhesion tack value on the cylinder inner surface film surface of the cylindrical film is preferably zero, but it may be somewhat, and from the viewpoint of handleability, 0 N or more and 0.0. It is preferably within a range of less than 2N.

  Moreover, it is preferable that the self-adhesion tack value of the cylinder outer surface side film surface of a cylindrical film is 0N or more and less than 5.0N. If it is out of these ranges, the efficiency at the time of tire molding deteriorates.

  The tubular film 3 may have a self-adhesive tack value on the outer surface side film surface of the tubular resin film 3 larger than the self-adhesive tack value on the inner surface film surface of the tubular resin film 3. More preferably, the self-adhesion tack value of the tubular outer surface side film surface of the tubular film is preferably 0 N or more and 5.0 N or less.

  As a technique for imparting tack properties to the film surface, (1) co-extrusion of an adhesive and a film, and (2) application of an adhesive or cement to the film surface can be performed.

  The cylindrical film may be a single layer film or a multi-layer structure. In the case of a plurality of layers, one of them may be an adhesive layer.

  In order to carry out the present invention more effectively, it is also important to make the material used for the tubular film suitable. In the present invention, the thermoplastic resin and elastomer preferably used for the tubular film are described below. A thermoplastic elastomer composition comprising a blend of these will be described. However, this description is an example suitable for use as an inner liner of a pneumatic tire.

As an example of the thermoplastic resin suitably used for the tubular film in the present invention, the air permeability coefficient is preferably 25 × 10 ⁻¹² cc · cm / cm ² · sec · cmHg or less, preferably 5 × 10 10. ^-12 cc · cm / cm ² · sec · cmHg or less, and Young's modulus is 1 to 500 MPa, preferably 10 to 300 MPa.

When the air permeability coefficient exceeds 25 × 10 ⁻¹² cc · cm / cm ² · sec · cmHg, when used as an inner liner of a pneumatic tire, the thickness of the air permeation preventive layer for maintaining tire air pressure is increased. In addition, if the Young's modulus is less than 1 MPa, wrinkles and the like are generated at the time of molding the tire and molding processability is lowered. Conversely, if it exceeds 500 MPa, it is not preferable from the viewpoint of durability.

  Examples of such thermoplastic resins include polyamide resins [eg, nylon 6 (N6), nylon 66 (N66), nylon 46 (N46), nylon 11 (N11), nylon 12 (N12), nylon 610. (N610), nylon 612 (N612), nylon 6/66 copolymer (N6 / 66), nylon 6/66/610 copolymer (N6 / 66/610), nylon MXD6, nylon 6T, nylon 6 / 6T Copolymer, nylon 66 / PP copolymer, nylon 66 / PPS copolymer], N-alkoxyalkylated products thereof (for example, methoxymethylated product of 6-nylon, methoxymethylated product of 6-610-nylon, 612- Methoxymethylated product of nylon], polyester resin [for example, polybutylene terephthalate (PBT), polyethylene terephthalate (PET), polyethylene isophthalate (PEI), PET / PEI copolymer, polyarylate (PAR), polybutylene naphthalate (PBN), liquid crystal polyester, polyoxyalkylene diimide diacid / polybutylene Aromatic polyesters such as terephthalate copolymers], polynitrile resins (for example, polyacrylonitrile (PAN), polymethacrylonitrile, acrylonitrile / styrene copolymer (AS), methacrylonitrile / styrene copolymer, methacrylonitrile / Styrene / butadiene copolymer], polymethacrylate resin [for example, polymethyl methacrylate (PMMA), polyethyl methacrylate], polyvinyl resin [for example, vinyl acetate (EVA), polyvinyl alcohol (PVA), vinyl alcohol / ethylene copolymer (EVOH), polyvinylidene chloride (PVDC), polyvinyl chloride (PVC), vinyl chloride / vinylidene chloride copolymer, vinylidene chloride / methyl acrylate copolymer, vinylidene chloride / Acrylonitrile copolymer], cellulosic resin [eg cellulose acetate, cellulose acetate butyrate], fluorine resin [eg polyvinylidene fluoride (PVDF), polyvinyl fluoride (PVF), polychlorofluoroethylene (PCTFE), tetrafluoroethylene / An ethylene copolymer (ETFE)], an imide resin [for example, aromatic polyimide (PI)] or the like can be used, and two or more of these may be used.

  The material of the cylindrical film according to the present invention may be a material obtained by blending an elastomer with the above-described thermoplastic resin, assuming an inner liner application for a pneumatic tire. The elastomer component that can be blended with the thermoplastic resin is a composition that is blended with the thermoplastic resin, as long as it has the above air permeability coefficient and Young's modulus. Is not particularly limited.

  Examples of such elastomers include diene rubbers and hydrogenated products thereof [eg, NR, IR, epoxidized natural rubber, SBR, BR (high cis BR and low cis BR), NBR, hydrogenated NBR, hydrogen SBR], olefin rubber [eg ethylene propylene rubber (EPDM, EPM), maleic acid modified ethylene propylene rubber (M-EPM)], butyl rubber (IIR), isobutylene and aromatic vinyl or diene monomer copolymer, acrylic Rubber (ACM), ionomer, halogen-containing rubber [eg Br-IIR, Cl-IIR, bromide of isobutylene paramethylstyrene copolymer (Br-IPMS), chloroprene rubber (CR), hydrin rubber (CHC, CHR), chloro Sulfonated polyethylene (CSM), chlorinated polyethylene Ethylene (CM), maleic acid-modified chlorinated polyethylene (M-CM)], silicone rubber (eg methyl vinyl silicone rubber, dimethyl silicone rubber, methyl phenyl vinyl silicone rubber), sulfur-containing rubber (eg polysulfide rubber), fluoro rubber (eg Vinylidene fluoride rubber, fluorine-containing vinyl ether rubber, tetrafluoroethylene-propylene rubber, fluorine-containing silicone rubber, fluorine-containing phosphazene rubber), thermoplastic elastomer (eg, styrene elastomer, olefin elastomer, polyester elastomer, Urethane elastomer, polyamide elastomer) or the like may be used, and two or more of these may be used.

  In addition, when the compatibility between the specific thermoplastic resin and the elastomer component is different, it is also preferable to add an appropriate compatibilizing agent as the third component. That is, by mixing a compatibilizing agent into the system, the interfacial tension between the thermoplastic resin and the elastomer component is reduced, and as a result, the particles of the elastomer component forming the dispersed phase become finer. The characteristics will be expressed more effectively. As such a compatibilizing agent, generally a copolymer having a structure of one or both of a thermoplastic resin and an elastomer component, or an epoxy group, a carbonyl group, a halogen group, which can react with the thermoplastic resin or the elastomer component, A copolymer structure having an amino group, an oxazoline group, a hydroxyl group and the like can be taken.

  These may be selected according to the kind of the thermoplastic resin and the elastomer component to be mixed, and those usually used include styrene / ethylene butylene block copolymer (SEBS) and its maleic acid modified product, EPDM: EPDM / Styrene or EPDM / acrylonitrile graft copolymer and its maleic acid modified product, styrene / maleic acid copolymer, reactive phenoxin and the like. The amount of the compatibilizer is not particularly limited, but is preferably 0.5 to 10 parts by weight with respect to 100 parts by weight of the polymer component (the total of the thermoplastic resin and the elastomer component).

  The composition ratio between the specific thermoplastic resin (A) and the elastomer component (B) when blending the thermoplastic resin and the elastomer is not particularly limited, and the balance of film thickness, air permeation resistance, and flexibility is not limited. However, the preferred range is 10/90 to 90/10, more preferably 15/85 to 90/10 in terms of weight ratio (A) / (B).

Hereinafter, based on an Example, the concrete structure and effect of this invention are demonstrated.
In addition, each physical-property value shown by the above-mentioned description of this invention and the following Example is a value calculated | required by the method described below.
(1) Self-adhesive tack value:
The self-adhesion tack value on the inner surface side or the self-adhesion tack value on the outer surface side of the tubular film is determined by the measurement method described below.

  A cylindrical resin film, which is a sample to be measured, is cut into a 12.7 cm wide band and attached to the grip of a tack measuring machine (PICMA tack tester manufactured by Toyo Seiki Seisakusho Co., Ltd.). The inner surface sides or the outer surface sides of the cylindrical resin film were vertically pressed against each other (pressing time (pressure bonding time): 0.5 seconds), and the force when peeling them was measured.

The measurement conditions are as follows.
Upper sample film size: 12.7 mm × 152 mm
Crimping load: 4.90N
Peeling speed: 120 mm / min
Crimping time: 0.5 seconds Temperature: 20 ° C
Relative humidity: 65%
In the measurement, n number is 50, and raw data (unit: N) is obtained to the second decimal place, and the average value is obtained and then rounded off to the first decimal place. .
(2) Air permeability coefficient of film:
Using a cylindrical resin film as a sample to be measured, the measurement was made based on JIS K 7126 “Method A of Gas Permeability Test for Plastic Film and Sheet A”. The measurement was performed assuming that the n number was 10, and the average of these values was obtained.
(3) Young's modulus of the film:
It measured based on K6251 "Tensile test method of vulcanized rubber" using the cylindrical resin film which is a to-be-measured sample. The experiment was performed with the n number as 10, and the average of those values was obtained.
Example 1
A resin film having a circumferential length of 1260 mm produced by coextrusion of the resin film and the adhesive was folded to obtain a flattened cylindrical film width (W = 630 mm).

To this flattened tubular film,
S: Perforation length of perforated slit = 80 mm
L: Length of non-penetrating portion of perforated slit = 5 mm
E: Length of penetration part of pre-cut = 15mm
Slit ratio = 93%
A perforated slit was formed according to the specifications.

  The cylindrical resin film has a continuous longitudinal direction slit-to-slit interval of 360 mm, and a total of 100 units (sheets) of cylindrical films (tubular film width W = 630 mm, length 360 mm / sheet) connected to each other. The film (total length 36 m) was wound up as a single roll as shown in the model in FIG.

  For winding, a winding core was set on the support, and the separator was wound without any particular use.

  The self-adhesive tack value of this cylindrical resin film was 4.0 N on the outer surface side and 0.0 N on the inner surface side.

The air permeability coefficient was 20 × 10 ⁻¹² cc · cm / cm ² · sec · cmHg, and the Young's modulus was 50 MPa.

  The cylindrical resin film winding body according to the present invention obtained in this way is brought to the side of the tire production line, and the operator cuts the cylindrical resin film pieces one by one at the perforation part, It used for tire manufacture using it as a film for inner liners.

  As a result, workability was not particularly problematic, and tire production could be carried out without delay.

The cut end of the tubular film was cut cleanly despite being manually cut, and it was determined that there was no particular effect on tire performance.
Comparative Example 1
Similarly to Example 1, a resin film having a circumferential length of 1260 mm produced by coextrusion of a resin film and an adhesive was folded to obtain a flattened cylindrical film width (W = 630 mm).

To this flattened tubular film,
S: Perforation length of perforated slit = 65 mm
L: Length of non-penetrating portion of perforated slit = 30 mm
E: Length of penetration part of pre-cut = 15mm
Slit ratio = 62%
A perforated slit was formed according to the specifications.

  The cylindrical resin film has a continuous longitudinal direction slit-to-slit interval of 360 mm, and a total of 100 units (sheets) of cylindrical films (tubular film width W = 630 mm, length 360 mm / sheet) connected to each other. The film (total length 36 m) was wound up as a single roll as shown in the model in FIG.

  For winding, a winding core was set on the support, and the separator was wound without any particular use.

The self-adhesive tack value of this cylindrical resin film was 4.0 N on the outer surface side and 0.0 N on the inner surface side. The air permeability coefficient is 20 × 10 ⁻¹² cc · cm / cm ² · sec · cmHg, the Young's modulus is 50 MPa, and these are the same values as in Example 1.

  Take the cylindrical resin film winding body obtained in this way to the side of the tire production line, and the operator cuts the cylindrical resin film pieces one by one at the perforation part, as a film for the inner liner Used for tire production.

  As a result, the cutting workability at the slit portion is not good, the work tends to be delayed, and the cut end of the cylindrical film is not cut cleanly, and there is a saw blade-like film end protrusion etc. It was judged that there was a possibility of affecting the inner liner performance and thus the tire performance.

FIG. 1 is a schematic perspective model view for explaining a tubular film roll of the present invention. FIG. 2 is a schematic model plan view illustrating details of the connecting portion (perforated slit portion) 5. FIG. 3 is a partially enlarged schematic model plan view illustrating details of the connecting portion (perforated slit portion) 5. FIG. 4 is a partially enlarged schematic model plan view for explaining another example of the connecting portion (perforated slit portion) 5.

Explanation of symbols

1: Rolled body of cylindrical film 2: Continuous cylindrical film 3: Cylindrical film for each unit having a desired cylindrical film length 4: Cylindrical film separated at connecting portion 5: Connecting portion (Perforated slit)
6: Pre-cut W: Cylindrical film width S: Perforated portion of perforated slit L: Unperforated portion of perforated slit l ₀ : Desired cylindrical film length per unit E: Pre-cut through Department length

Claims (4)

  A film made of a thermoplastic resin as a main component is produced in a cylindrical shape, is folded flatly, and is wound up into a roll shape, and the cylindrical film for each unit is connected at the connecting portion. The connecting portion is composed of a perforated slit portion in which the penetrating portion S and the non-penetrating portion L are alternately and continuously present in a straight line, and the tubular film A cylindrical film roll-up body, wherein the ratio of the penetrating part S to the width W is 50% or more and 95% or less, and the length L of one non-penetrating part is 1 mm ≦ L ≦ 10 mm.   The rolled-up body of the tubular film according to claim 1, wherein a pre-cut having a penetration length E of 1 mm ≦ E ≦ 30 mm is provided at an end in the width direction of the tubular film.   3. The tubular film roll according to claim 1 or 2, wherein the film mainly composed of the thermoplastic resin is composed of a thermoplastic elastomer composition containing a blend of a thermoplastic resin and an elastomer. .   The tubular film roll-up body according to claim 1, 2, or 3, wherein the tubular film is used as an inner liner material of a tire.

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