JP2007099118A - Cylindrical resin film winding element - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cylindrical resin film aggregate solving problems in a handling property or carrying, even while being previously cut into cylindrical resin film pieces, without providing the cutting equipment of the cylindrical resin film in each tire manufacturing line, namely without simultaneously proceeding with cutting work to necessary cylindrical resin film pieces during the operation of the actual tire manufacturing line. <P>SOLUTION: A plurality of the cylindrical films each having thermoplastic elastomer composition made of thermoplastic resin or by blending the thermoplastic resin and elastomer as main ingredients is folded in a sheet shape, and continuously disposed so as to shift a position in a fore-and-aft direction in a winding direction. Each cylindrical resin film forms an actually continuous long sheet shape while forming a state which can be separated without being actually damaged, and wound up as a single roll element. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a rolled-up body of a cylindrical resin film, and more specifically, is configured to improve the convenience of using a large number of resin films molded and manufactured in a cylindrical shape in the next step. The present invention relates to a wound body of a novel cylindrical resin film.

  In the present invention, the cylindrical resin 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. Refers to a cylindrical film formed into a cylindrical shape by joining the opposite sides by an appropriate means. In the present invention, the term “cylindrical resin film” means that the resin film is formed into a cylindrical shape having open ports (open surfaces) on the top and bottom or open ports (open surfaces) on the left and right. .

  Such a cylindrical resin film is not particularly limited in terms of its industrial and industrial uses. For example, it can be used as an inner liner in the manufacture of pneumatic tires for automobiles, for image forming apparatuses in electrophotography. There are applications for intermediate transfer belts and conveyor belts used.

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

  For example, in the application field of pneumatic tires, the resin film formed into a 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, from the film manufactured as a continuous hollow tube-shaped film, the size of each cylindrical resin film piece should be the most considered for the handling of the plurality of sheets after cutting them out. Therefore, there should be no hindrance, inconvenience or inconvenience in the work in the subsequent tire manufacturing process.

  Specifically, each cylindrical resin film is easy to be securely gripped, and it is not wrinkled as much as possible. Even if it is made into a sheet shape, it is easily reproduced as a three-dimensional cylindrical shape. What can be done is important.

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

  For example, until just before the tire molding process, an integral continuous hollow tubular film form is maintained, and immediately before being put into the tire molding process, it is cut into individual cylindrical resin sheet pieces, and the tire molding process as it is It is proposed to supply to (patent documents 1, 2).

  However, in such a system, it is necessary to carry a continuous hollow tubular film and arrange the cutting device for each tire molding line, which is not necessarily efficient and requires space, Even when the production line is actually in operation, there is a problem that it is difficult for the production line to respond flexibly when a defective state such as failure of cutting or generation of wrinkles occurs.

  For such a problem, improvement of the cylindrical resin film itself has been studied, and optimization of self-adhesion tack (degree of sticking of the own film surface) has been proposed (Patent Document 3).

In addition, from the viewpoint that it is not necessary to provide a cutting mechanism for each tire production line, when a hollow tubular film is continuously produced, it is immediately cut into individual cylindrical resin film pieces. Although it is possible to stack and store in a box etc. and send it to each tire production line, in normal cases, if you stack and store in a box etc., the films will stick together or the take-out end will be There are problems such as being difficult to understand, and as a result, the amount of storage cannot be increased, and it is also necessary to perform manual operations in the work of laminating, storing, packing, and taking out the delicate cylindrical resin film There's a problem.
JP 2001-219478 A JP 2004-167781 A JP 2005-103760 A

  In view of the above-described points, an object of the present invention is to provide a cylindrical resin film piece necessary without providing a tubular resin film cutting facility for each tire production line, that is, during operation of an actual tire production line. There is no need to proceed with the cutting work in parallel, and a new tubular resin film aggregate that has been cut into tubular resin film pieces in advance, but the problems in terms of handling and transportation are solved Is intended to provide.

The rolled-up body of the cylindrical resin film of the present invention that achieves the above-described object has the configuration described in the following (1).
(1) A plurality of tubular resin films mainly composed of a thermoplastic resin or a thermoplastic elastomer composition composed of a thermoplastic resin and an elastomer are folded into a sheet shape, and back and forth in the winding direction. The cylindrical resin films are continuously arranged at different positions while maintaining a state in which the individual cylindrical resin films can be separated again from each other without substantial damage. A rolled-up body of a cylindrical resin film, which is formed into a long sheet shape and wound up as a single roll body.

Furthermore, in the tubular resin film roll according to the present invention, more specifically, preferably, it has the following configurations (2) to (11).
(2) The tubular resin film roll-up body as described in (1) above, wherein the tubular resin film is used as an inner liner material of a tire.
(3) The plurality of tubular resin films being wound are characterized in that the form as a wound body of the film is maintained by the self-adhesive tack property of the surface of the cylinder outer surface side of the tubular resin film. A rolled-up body of the cylindrical resin film according to the above (1) or (2).
(4) The cylindrical resin film has a self-adhesive tack value on the cylinder outer surface side film surface of the cylindrical resin film larger than the self-adhesive tack value on the cylinder inner surface film surface of the cylindrical resin film. A rolled-up body of a cylindrical resin film as described in (1), (2) or (3) above,
(5) The above-mentioned (1), (2), (3) or (5), wherein the self-adhesion tack value on the outer surface of the cylindrical resin film is 0.2 N or more and 5.0 N or less. 4) A rolled-up body of the tubular resin film as described.
(6) The above-mentioned (1), (2), (3), (3), wherein the self-adhesion tack value of the cylindrical inner film surface of the cylindrical resin film is 0.0 N or more and less than 0.2 N 4) or the rolled-up body of the cylindrical resin film according to (5).
(7) The front end portion of the tubular resin film folded into a sheet shape is overlapped with the rear end portion of the tubular film folded into the previous sheet shape, and the state is sequentially repeated, The cylindrical resin film according to (1), (2), (3), (4), (5) or (6), wherein the cylindrical resin film is wound up on a single roll body A roll of film.
(8) When the front end portion of the tubular resin film folded into a sheet is overlapped with the rear end portion of the tubular film folded into the previous sheet, the front end portion of the tubular resin film is The rolled up body of the cylindrical resin film according to the above (7), wherein the rolled up body is positioned on the inner core side of the rear end portion of the cylindrical film folded into the previous sheet.
(9) The length S of the overlapping portion in the winding direction is related to the winding direction length W of the tubular resin film folded into a sheet shape, and satisfies 0 <S / W ≦ 0.45. The tubular resin film roll-up body as described in (7) or (8) above, wherein
(10) The length S of the overlapping portion in the winding direction satisfies 0.02 <S / W ≦ 0.30 in relation to the winding direction length W of the tubular resin film folded into a sheet shape. The tubular resin film roll-up body as described in (7) or (8) above, wherein the roll-up body is wound up.
(11) When a plurality of tubular resin films folded into a sheet form are wound up as a single roll body in a continuous long sheet form, a separator is interposed between the long sheet forms (1), (2), (3), (4), (5), (6), (7), (8), (9) or (10) A rolled-up body of the cylindrical resin film according to (10).
(12) When a plurality of tubular resin films folded into a sheet form are wound up as a single roll body in a continuous long sheet form, a separator is interposed between the long sheet forms. (1), (2), (3), (4), (5), (6), (7), (8), (9) or (10) The rolled-up body of the cylindrical resin film of description.

  According to the first aspect of the present invention, a cylindrical resin film cutting facility is not provided for each tire production line, that is, during operation of an actual tire production line, cutting into necessary cylindrical resin film pieces. Providing an aggregate of cylindrical resin films that eliminates the need for advancing work in parallel and that has been cut into cylindrical resin film pieces in advance, while eliminating problems in terms of handling and transportation It was made.

Hereinafter, the rolled up body of the cylindrical resin film of the present invention will be described in more detail.
The rolled body of the tubular resin film of the present invention is formed by folding a plurality of tubular resin films each having a thermoplastic elastomer composition comprising a thermoplastic resin or a blend of a thermoplastic resin and an elastomer as a main component. In addition, the cylindrical resin films are continuously arranged with their positions shifted back and forth in the winding direction, and the individual cylindrical resin films can be separated from each other without substantial damage. However, it is characterized in that it is wound up as a single roll body in the form of a substantially continuous long sheet.

  The length of the cylindrical resin film used in the present invention is not infinite, and a certain finite length should be determined depending on the specific application of the cylindrical resin film.

  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, although it is not completely equal.

  Moreover, a cylindrical resin film means the cylindrical film in which the upper and lower (or right and left) end surfaces are formed as open surfaces.

In the present invention, a cylindrical resin film mainly composed of a thermoplastic elastomer composition composed of a thermoplastic resin or a blend of a thermoplastic resin and an elastomer is generally discharged as having an infinite length from a molten die hole. Although formed, as shown in FIG. 1 (a), it was once cut into a cylindrical resin film molding 1 having an appropriate original cylinder length L ₀ determined in consideration of workability such as handling. Thereafter, as shown in FIG. 1 (b), a film formed into a cylindrical shape such as a cylindrical shape is folded into a sheet to form a flat sheet 1 ′, and then shown in FIG. 1 (c). As described above, each cylindrical resin film 3 having a length L that is put into the tire manufacturing process is cut. Further, a flat sheet that is discharged and folded into a sheet shape may be continuously cut into a length L without being cut into the original cylinder length L ₀ .

  Note that the cylindrical resin film 3 does not necessarily need to be cut after the cylinder or the like is crushed into a sheet shape, as shown in FIG. 2 (a). It may be cut into a length L and then folded into a sheet shape and planarized as shown in FIG. Further, at the time of discharging from the base of the original film, a single plane single layer sheet may be formed into a cylindrical film by joining both ends thereof.

  As shown in FIG. 3 and FIG. 4, the cylindrical resin film 3 folded into a sheet shape is arranged substantially continuously by shifting the position back and forth in the winding direction. A long sheet shape is formed and wound up as a single roll body 4. This winding is done by arranging a plurality of cylindrical resin films and successively winding them up manually, etc., while keeping the tip of the next cylindrical resin film along the winding layer of the cylindrical resin film that has already been rolled up. It can be realized by winding up.

  The embodiment shown in FIGS. 3 and 4 shows an example in which the front and rear cylindrical films are partially overlapped and wound up. More specifically, the tip of the cylindrical resin film folded into a sheet shape is shown. A cylindrical shape that is overlapped and wound up with the rear end portion of the cylindrical film folded into the previous sheet shape, and the front end portion of the cylindrical resin film is folded into the previous sheet shape The state which is located and overlapped on the inner core side of the rear end portion of the film is shown. Employing such a winding method is preferable because the positions of the front and rear ends of each tubular resin film are easy to understand. FIG. 3 shows a case where the opening (surface) of the cylindrical resin film is wound up in a position substantially perpendicular to the winding direction (arrow direction), and FIG. 4 shows the opening of the cylindrical resin film. (Surface) shows a winding method in a positional relationship substantially parallel to the winding direction (arrow direction). According to the knowledge of the present inventors, although any winding method may be used, the cylindrical open end is not located on the side surface of the roll body from the viewpoint of further preventing foreign matters from being mixed into the cylindrical shape. The scheme of FIG. 3 is better.

  In the present invention, "a plurality of individual cylindrical resin films are continuously arranged with their positions shifted back and forth in the winding direction and can be separated from each other without substantial damage. While maintaining the state, it is wound up as a single roll body in the form of a substantially continuous long sheet, ”as shown in FIG. 3 or FIG. Says that it is rolled up in a row.

  In the present invention, “a plurality of individual cylindrical resin films are continuously arranged with their positions shifted back and forth in the winding direction” as shown in FIG. 3 and FIG. It is sufficient if the direction of one side of the resin film is in a vertical or parallel relationship, and the resin film may be deviated by about 5 ° from front to back from the vertical or parallel direction.

  In addition, “maintaining a state in which they can be separated from each other without suffering substantial damage” means that a part of the tubular film is not accompanied by special breakage. It refers to a state where it is wound up in a state where it can be separated into individual tubular films. For example, a part of the overlapping portion of the individual tubular resin films is joined by an adhesive or the like, and the joining is performed. This excludes a state in which separation is not possible without partial destruction. When a part of the cylindrical resin film is damaged, for example, in the use of an inner liner of a pneumatic tire, the damaged part may be a starting point causing trouble or failure, which is not preferable.

  As described above, “a plurality of individual cylindrical resin films can be continuously arranged with their positions shifted back and forth in the winding direction, and can be separated from each other without substantial damage. While maintaining this state, it is possible to form a substantially continuous long sheet and roll it up as a single roll body "by making the overlapping of the tubular films appropriate. Further, it can be realized more appropriately if the degree of mutual sticking derived from the film material is made appropriate.

  According to the knowledge of the present inventors, in the case of winding up partly overlapping as shown in FIGS. 3 and 4, as shown in the model diagram in FIG. Is preferably rolled up to satisfy 0 <S / W ≦ 0.45, more preferably 0 in relation to the winding direction length W of the cylindrical resin film folded into a sheet shape. 0.02 <S / W ≦ 0.30 to be satisfied.

  Further, when there is no overlapping portion, specifically, as shown in the model in FIG. 6A, the front and rear cylindrical resin films are rolled up in a butted state, or in FIG. When the front and rear cylindrical resin films are rolled up at a slight interval as shown in FIG. 3), a plurality of cylindrical resin films 3 to be rolled up have a cylindrical outer surface side film surface that the cylindrical resin film 3 itself has. The self-adhesive tack property of the film is important so that the film as a wound body is maintained.

  Specifically, the cylindrical resin film 3 has a self-adhesion tack value on the cylinder outer surface side film surface of the cylindrical resin film 3 which is higher than the self-adhesion tack value on the cylinder inner surface film surface of the cylindrical resin film 3. The self-adhesive tack value on the surface of the cylindrical outer surface of the cylindrical resin film is preferably 0.2 N or more and 5.0 N or less. By adopting such a configuration, the cylindrical resin film can be formed into a single roll body by the self-adhesive force with respect to the already-rolled cylindrical resin film even in the embodiment shown in FIGS. 6 (a) and 6 (b). As a result, it is possible to easily wind up and reproduce a cylindrical three-dimensional structure, which is preferable. Specifically, when the self-adhesion tack value is larger than 5.0 N, the end of the tubular film wound up in the lower layer may be pulled up, which is not preferable, but less than 0.2 N Then, there is almost no behavior that the film sticks and it is difficult to wind up as a single roll body.

  According to the various knowledge of the present inventors, the self-adhesion tack value on the cylinder inner surface side film surface of the cylindrical resin film may be zero if it is zero, but may be somewhat, from the viewpoint of handleability and the like. It is preferably 0N or more and less than 0.2N.

  In the present invention, when a large number of cylindrical resin films folded into a sheet form are rolled up as a single roll body in a continuous long sheet form, a separator is interposed between the long sheet forms. It is preferably wound up without being interposed, and winding up without using such a separator constitutes a rolled body of the cylindrical resin film of the present invention with an appropriate self-adhesive tack value and the like. This is the original technical idea.

  In the rolled body of the cylindrical resin film of the present invention, although not particularly limited, the number of cylindrical resin films wound up on one wound body is 50 to 500 according to the knowledge of the present inventors. It is preferable that the number of sheets is about 1, and most preferably about 100 to 300. If too many sheets are wound, the total weight of the wound body becomes too heavy, and the shape of the wound body is distorted due to its own weight, which may cause problems in peeling or eventually damage. In addition, when the number of windings is small, the work efficiency is lowered, which is not preferable.

  Effective techniques for imparting tack properties to the film surface include (1) co-extrusion of an adhesive and a film, and (2) application of an adhesive or cement to the film surface.

  However, taking into consideration the dimensions of the cylindrical resin film, the weight of the roll body, and the like, the separator may be appropriately wound between the long sheets. In particular, it is expected that the handleability will change in response to the storage period / standby period, its own weight, etc. as a roll body. This is because it may be preferable to give more careful consideration, for example, to prevent wrinkles or uneven loads from entering each cylindrical resin film.

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

That is, as an example, the thermoplastic resin suitably used for the cylindrical resin film in the present invention preferably has an air permeability coefficient of 25 × 10 ⁻¹² cc · cm / cm ² · sec · cmHg or less, preferably 5 × 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 resin film of the present invention may further be one obtained by blending an elastomer with the above-described thermoplastic resin, assuming use as an inner liner 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, the configuration and effect of the rolled body of the cylindrical resin film of the present invention will be described more specifically with reference to examples and comparative examples.

In addition, each physical-property value used by description of this invention is a value calculated | required by the method described below.
(1) Self-adhesive tack value:
About the self-adhesion tack value, both the outer surface side and the inner surface side of the tubular film are based on the same 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 same film sheet cut into 10 cm squares Next, the outer surface sides or the inner surface sides of the cylindrical resin film were pressed vertically (pressing time (pressing time): 0.5 seconds), and the force at the time of 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 1200 mm produced by coextrusion of a resin film and an adhesive was folded and cut at a length of 360 mm to produce 100 cylindrical resin film pieces having the same dimensions.

  100 pieces of this cylindrical resin film piece were wound up as a single roll body by the method of FIG. For winding, the core was set on the support and wound up while being arranged manually one by one. The film was wound up so that the winding direction and the direction of one side of the cylindrical resin film were substantially parallel to each other.

  The length W of the cylindrical resin film folded into a sheet is 360 mm, the length S of the overlapping portions in the winding direction of the front and rear cylindrical resin films is 72 mm, and the S / W is 20%. Yes, the separator was wound up without any particular use.

  The self-adhesion tack value of this 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 rolled body of the cylindrical resin film according to the present invention thus obtained is taken to the side of the tire production line, and each piece of the cylindrical resin film is peeled off and used as an inner liner film. It used for manufacture.

  As a result, workability was not particularly problematic, and tire production could be carried out without delay. The roll form of the roll body was not a clean cylindrical shape because of the overlapping portion, but was inferior to that of Example 2 described later.

Example 2
As shown in FIG. 6 (a), 100 cylindrical resin film pieces according to the present invention were formed in the same manner as in Example 1 except that the front and rear cylindrical resin films were continuously wound up by the butting method. A wound body was produced.

  The rolled body of the cylindrical resin film according to the present invention thus obtained is taken to the side of the tire production line, and each piece of the cylindrical resin film is peeled off and used as an inner liner film. It used for manufacture.

  As a result, workability was not particularly problematic, and tire production could be carried out without delay. Compared with the roll body of Example 1, the outer shape was a beautiful cylindrical shape, and the handling property in that respect was good. However, after peeling off one cylindrical resin film, when taking out the next cylindrical resin film, it was evaluated that its end portion was somewhat difficult to understand.

Example 3
As shown in FIG. 6B, the present invention is the same as in Example 1 except that the front and rear cylindrical resin films are separated by about 70 mm and continuously wound using the tack force of the film. A roll of 100 tubular resin film pieces was produced.

  The rolled body of the cylindrical resin film according to the present invention thus obtained is taken to the side of the tire production line, and each piece of the cylindrical resin film is peeled off and used as an inner liner film. It used for manufacture.

  As a result, workability was not particularly problematic, and tire production could be carried out without delay. Compared with the roll body of Example 1, after peeling one cylindrical resin film, when taking out the next cylindrical resin film, it was evaluated that its end portion was somewhat difficult to understand.

Example 4
Using a polyethylene film (thickness: 50 μm) having the same width as that of the cylindrical resin film piece but having a higher hardness as the separator, the separator and the cylindrical resin were the same as in the winding of Example 1 except for that. A long sheet-like material with continuous film pieces was superposed to produce a rolled body made up of 100 cylindrical resin film pieces and a separator.

  Take the cylindrical resin film rolls obtained according to the present invention to the side of the tire production line, pull them out with the separator, and peel off the cylindrical resin film pieces one by one as a film for the inner liner Used for tire manufacture.

  As a result, workability was not particularly problematic, and tire production could be carried out without delay. The roll form has an overlapped part, but the roll form is good because it uses a separator, but the whole roll form is large, and there is room for improvement in handling in that respect. It was evaluated that there is.

FIG. 1 is a model perspective view illustrating an example of a process for producing a tubular resin film roll of the present invention. FIG. 2 is a model perspective view for explaining another example of the process for producing the tubular resin film roll of the present invention. FIG. 3 is a model perspective view for explaining an example of a process for manufacturing a rolled body of the cylindrical resin film of the present invention by partially overlapping and winding up the front and rear cylindrical films. FIG. 4 is a model perspective view for explaining another example of the process of manufacturing the rolled body of the tubular resin film of the present invention by partially rolling up the front and rear tubular films. FIG. 5 is a model perspective view for explaining an example of a method of manufacturing a rolled body of the cylindrical resin film of the present invention by partially winding up and down the cylindrical films of the front and rear. FIGS. 6A and 6B are models for explaining an example of a method for producing a rolled body of the cylindrical resin film of the present invention by winding up the front and rear cylindrical films without overlapping each other. It is a perspective view.

Explanation of symbols

1: Original cylindrical length L ₀ cylindrical resin film molded product 1 ′: Flat sheet material 2: Cylindrical resin film 3: Resin film folded in sheet shape 4: Single roll body W: Sheet shape Winding direction length S of the folded cylindrical resin film: length of overlapping portions in the winding direction of the front and rear cylindrical resin films

Claims (12)

  A plurality of tubular resin films mainly composed of a thermoplastic resin or a thermoplastic elastomer composition composed of a thermoplastic resin and an elastomer are folded into a sheet shape and shifted in the front-rear direction in the winding direction. Are arranged continuously, and the individual cylindrical resin films are maintained in a state where they can be separated from each other without substantial damage, and are substantially continuous long sheets. A rolled-up body of a cylindrical resin film, characterized in that it is wound up as a single roll body.   The tubular resin film roll-up body according to claim 1, wherein the tubular resin film is used as an inner liner material of a tire.   The plurality of cylindrical resin films being wound up are maintained in the form of a film winding body by the self-adhesive tack property of the cylinder outer surface side film surface of the cylindrical resin film. A rolled-up body of a cylindrical resin film according to 1 or 2.   The cylindrical resin film is characterized in that the self-adhesion tack value of the cylindrical outer film side film surface of the cylindrical resin film is larger than the self-adhesion tack value of the cylindrical inner film surface of the cylindrical resin film. The rolled-up body of the cylindrical resin film of Claim 1, 2 or 3.   The cylindrical resin film winding according to claim 1, 2, 3, or 4, wherein the self-adhesion tack value of the cylindrical outer film side film surface of the cylindrical resin film is 0.2N or more and 5.0N or less. body.   6. The tubular resin film according to claim 1, wherein a self-adhesion tack value of the tubular inner surface side film surface of the tubular resin film is 0.0N or more and less than 0.2N. Rolled up body.   The front end portion of the tubular resin film folded into a sheet is overlapped with the rear end portion of the tubular film folded into the previous sheet shape, and the state is sequentially repeated to form a plurality of tubular shapes. The tubular resin film roll-up body according to claim 1, 2, 3, 4, 5 or 6, wherein the resin film is wound up on a single roll body.   When the leading end portion of the tubular resin film folded into a sheet is overlapped with the trailing end portion of the tubular film folded into the previous sheet shape, the leading end portion of the tubular resin film is The tubular resin film roll-up body according to claim 7, wherein the rolled-up body of the tubular resin film is located on the inner core side of the rear end portion of the tubular film folded in a sheet shape.   The length S of the overlapping portion in the winding direction is wound up so as to satisfy 0 <S / W ≦ 0.45 in relation to the winding direction length W of the tubular resin film folded into a sheet shape. The rolled-up body of the cylindrical resin film according to claim 7 or 8.   The length S of the overlapping portion in the winding direction is wound up in a relationship of 0.02 <S / W ≦ 0.30 in relation to the winding direction length W of the tubular resin film folded into a sheet shape. The tubular resin film roll-up body according to claim 7 or 8, wherein the roll-up body is a tubular resin film.   When many cylindrical resin films folded into a sheet form are rolled up as a single roll body in a continuous long sheet form, no separator is interposed between the long sheet forms. The tubular resin film roll according to claim 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10, wherein the roll is wound.   When a large number of tubular resin films folded into a sheet form are wound up as a single roll body in a continuous long sheet form, a separator is interposed between the long sheet forms and wound up. The tubular resin film roll-up body according to claim 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10.

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