JP2001097640A - Paper tube for winding shaft core and roll form scroll - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a paper tube for winding shaft core which generates no end face slippage practically to a roll form scroll of plastic film, and can recover its full layer as an old paper, and a roll form scroll wound on the above paper tube. And to prevent the unevenness of both end faces of the roll form winding article of plastic film, as well as to make it possible to recover the paper tube for shaft core as an old paper. SOLUTION: This is a paper tube for winding shaft core formed by winding a stencil paper for paper tube in a spiral form and in a layer form, and at least the surface layer of the above paper tube is formed of a paper applying at least one sort of processing agent, and the roll form scroll is made by using this paper tube.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shaft core paper tube used when winding a plastic film or the like to a predetermined length, and a roll-shaped roll obtained by winding the plastic film using the paper tube. Specifically, at least the outermost layer of the take-up shaft paper tube is formed of paper coated with a processing agent, and the end surface misalignment is prevented when a plastic film or the like is rolled up in a roll shape, and And a roll-shaped roll wound using the paper tube.

[0002]

2. Description of the Related Art Generally, in the process of manufacturing and using plastic films and processed products thereof, synthetic resin filaments, synthetic resin woven fabrics, synthetic resin nonwoven fabrics, and the like in large quantities, these are formed into cylindrical winding shafts. It is wound around a core paper tube, wound up in a roll shape to a predetermined length, and provided for its use.

[0003] The take-up shaft core paper tube includes a liner paper, a base paper, a liner paper, a surface paper, etc.
These are collectively referred to as a paper tube base paper) and spirally wound continuously at a predetermined angle, and each layer is fixed by an adhesive. Generally, bleached kraft paper is often used as a base paper for a paper tube forming the outermost layer. In addition, polyethylene laminated paper, release paper, etc. may be used. However, these cannot be recovered as waste paper because the resin film layer is formed on the surface layer of the base paper, and are expensive because of the high processing cost, which is preferable in terms of resource reuse. I can't say.

A plastic film is wound up into a roll using a winding shaft paper tube using bleached kraft paper as the outermost layer, and both end surfaces (side surfaces) of the wound material are slit as necessary to evenly align both end surfaces. Is done. The roll-shaped roll obtained in this manner has a tendency that the position of the film end of each layer shifts with the passage of time and irregularities occur on both end faces, and the shape of both end faces is not uniform (smooth). Hereinafter, in the present invention, this phenomenon is referred to as end face shift. The end face deviation is
This occurs particularly in summer when the temperature is high, and the deviation width increases. When the end face shift is remarkable, there is a problem that the film cannot be taken out or broken when the roll is released.

[0005] As a measure for solving the problem of the end face misalignment of the roll-shaped material, a method of winding the material to a predetermined length, stabilizing the wound state by heat treatment (aging), slitting both ends, orienting vertically and horizontally is adopted. There are a method of forming a film by reducing the ratio, a method of loosening the tension at the time of winding, and the like. However, none of these methods has a low productivity, and the effect of preventing end face displacement is not satisfactory.

[0006]

SUMMARY OF THE INVENTION In view of the above-mentioned problems, it is an object of the present invention to provide a roll-shaped wound material having a substantially flat end face when a plastic film is wound into a roll on a winding core paper tube. The take-up shaft paper tube, which does not wake up and can collect all layers of the take-up shaft paper tube as used paper,
And a roll-shaped roll wound around the paper tube.

[0007]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies to solve the above-mentioned problems, and as a result, have found that at least the outermost layer is formed of paper coated with at least one treatment agent. The present inventors have found that a paper tube can solve the above-mentioned problems, and have finally reached the present invention.

That is, the present invention relates to a winding core paper tube formed by spirally winding a base paper for a paper tube in a layered manner, wherein at least the outermost layer of the paper tube has at least one treatment agent. It is a winding shaft core paper tube formed of the coated paper. In a preferred embodiment of the present invention, the winding agent core paper tube using a water-soluble olefin-based wax, an aqueous emulsion-based silicone, or a mixture thereof as the treatment agent. The coating amount of the treatment agent is preferably 0.5 to 25 g / m ² as a solid content, and the friction angle between the outermost layer of the paper tube and the plastic film is preferably 18 to 40 degrees.

Another aspect of the present invention is a roll-shaped roll in which a plastic film is wound in a roll around each of the winding shaft core paper tubes. The roll-shaped rolled material according to the present invention has an effect that substantially no end face displacement occurs, and all layers of the wound shaft core paper tube can be recovered as used paper. In the present invention, the friction angle between the outermost layer of the take-up shaft core paper tube and the plastic film means a value measured by a method described in Examples described later.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail. The basic structure of the take-up core paper tube of the present invention is formed by winding a plurality of layers of a paper tube base paper coated with an adhesive at a predetermined angle in a spiral shape and laminating them, thereby forming a cylindrical shape. . Then, at least the outermost layer is formed of paper coated with a treatment agent. The winding shaft core paper tube of the present invention,
The shape is not particularly limited, but usually, the inner diameter is about 20 to 150 mm, the thickness is about 2 to 15 mm, and the length is about 150 to 15000 mm.

[0011] In the method for manufacturing the rolled core paper tube of the present invention, an adhesive is applied to one side of a paper tube base paper, and this is spirally and layered, for example, on a metal core rod of a paper tube forming machine. There is a winding method. The paper tube forming machine may be a known one. For example, a paper tube forming machine manufactured by Langston, USA, type: Langston and the like can be mentioned.

Usually, the innermost layer of the paper tube is formed of liner paper or the like. The basis weight of the liner paper is preferably about 160 to 230 g / m ² . A normal base paper (with a basis weight of about 250 to 600 g / m ² ) to which an adhesive has been applied is successively laminated in a spiral pattern on the innermost layer. Usually, the number of layers is 3 to 15
About a layer. At least the outermost layer is formed by winding a specific surface-treated paper so that the treated surface is on the front side. The layer formed using the surface-treated paper may be only the outermost layer, but may be formed in the same manner as two or three layers adjacent thereto. The cylindrical paper tube may be cut to a predetermined length by using, for example, a tube machine or the like.

The surface-treated paper used as the outermost layer of the wound core paper tube of the present invention is, for example, coated on one side of bleached kraft paper with a water-soluble olefin wax, aqueous emulsion silicone, or a mixture thereof, and dried. . It is preferable to use one whose surface is finished smoothly. As the outermost base paper, bleached kraft paper is preferred. The bleached kraft paper preferably has a basis weight of about 30 to 120 g / m ² .

Examples of the water-soluble olefin-based wax include Polylon A and Polylon 393, manufactured by Chukyo Yushi Co., Ltd., manufactured by Hoechst and trade names; Hoechst wax PED series. Examples of the aqueous emulsion silicone include, for example, Nissan Chemical Industries, Ltd., trade name; Snowtex S, Toshiba Silicone Co., Ltd., trade name, TSW-831, and the like. Of these, Chukyo Yushi Co., Ltd., trade name; Polylon 39
3, and Toshiba Silicone Co., Ltd., trade name; TSW
-831 is preferred.

There are no particular restrictions on the method of applying and finishing the treatment agent, and any method commonly used by those skilled in the art may be used. The amount of the treatment agent applied affects the slipperiness of the paper tube surface. If the coating amount is too small, the friction angle with the plastic film becomes large. On the other hand, if the amount is too large, not only is it difficult to finish the surface smoothly, but also adverse effects may occur when the waste paper is collected. In consideration of this point, the amount of the treatment agent applied is about 0.5 to 25 g as a solid content.
/ M ² is preferred. More preferably, about 0.5 to 10 g /
m ² . As a finishing method after application, 50 to 12
A method in which the surface is smoothed by passing between hot rolls at about 0 ° C. may be used.

The surface of the wound shaft core paper tube manufactured as described above has an appropriate slipperiness. The slipperiness is in the range of 18 to 40 degrees in terms of the friction angle with the plastic film. Therefore, the roll-shaped roll obtained by winding the plastic film on the winding core paper tube of the present invention is:
The end face does not shift even in summer. Examples of the friction angle with a plastic film are as follows: Mitsui Chemicals Platech Co., Ltd., food packaging material, trade name; High Wrap SAS
The angle of friction with is 28 degrees, manufactured by the company, agricultural coating materials,
The product has a friction angle of 34 degrees with Mitsui Nori Bi Transparent Kirikit).

Heretofore, there are polyethylene laminated paper and release paper as known ones corresponding to the surface-treated paper. However, since these papers have a resin film layer formed on the surface, they cannot be recovered as used paper, cannot be reused, and have a problem that the cost increases. On the other hand, the surface-treated paper according to the present invention has an advantage that no resin film layer is formed on the surface and can be recovered as used paper. Furthermore, the friction angle with the plastic film is in the range of 18 to 40 degrees, which is extremely effective in preventing the end face of the roll of the plastic film from shifting.

Next, a roll-shaped roll obtained by winding a plastic film using the shaft core paper tube of the present invention will be described. The plastic film according to the present invention can be produced by a known method, for example, a calender method, a T-die method,
It may be formed by any method such as an inflation method. Further, as a method for winding the formed film around a predetermined length on the take-up shaft core paper tube of the present invention, there are known methods such as a surface method and a center winder method. You may adopt it.

Examples of the plastic film to which the present invention can be preferably applied include, for example, a soft vinyl chloride film (thickness: 8 to 30 μm, self-adhesion force: 200 to 700 g / cm ² ) used for food packaging, and an agricultural house. Agricultural polyvinyl chloride film used as a coating material (thickness: 30 to 200 μm, self-adhesion: 150 g / c)
m ² or more). Furthermore, it can be applied to polyolefin-based films, but the adhesiveness between the paper and the film on the outermost layer of the shaft core paper tube of the present invention is low, so it is necessary to apply an adhesive to the paper tube immediately before winding the film around the paper tube. May be present, but does not limit the invention.

Usually, both ends of the above-mentioned roll of plastic film are cut uniformly by a slitter to obtain a uniform roll of plastic film. The roll-shaped roll to which the winding core paper tube of the present invention is applied is one in which the end face deviation of the roll with time is substantially prevented. The film length of the roll is 50
It is about 1500 m. The thickness of the wound layer of the film is about 5 to 200 mm. The width of the roll is substantially the same as the length of the paper tube. After being formed as a roll, the material may be cut together with the paper tube, or the film portion may be cut while leaving an arbitrary amount (usually 5 to 50 mm on one side) of the paper tube portion.

[0021]

The present invention will be described below in further detail with reference to examples. The present invention is not limited by this. A method for measuring performance in the description of the present invention will be described below.

(1) Friction angle (unit: degree) a) Measuring device: Friction measuring device (Model: AN-S, manufactured by Toyo Seiki Seisaku-sho, Ltd.) b) Measurement method Attach the following sample film to the inclined plate. At this time, the film is attached so that the thickness of the film layer is about 0.1 mm.
The paper used for the outermost layer of the paper tube is attached to the thread (weight: 100 g). Fix the stopper slide to the zero point of the distance scale. Insert a thread between this and the sample holder, turn on the switch, gradually raise the inclination angle of the inclined plate, when the friction angle is reached, the thread slips and turns off the micro switch,
The ramp stops. The inclination angle at this time is read. This is defined as the friction angle. The measurement atmosphere was at a temperature of 23 ± 2.
° C, relative humidity: 50 ± 5%.

C) Sample film 1 <Composition> Vinyl chloride resin (average degree of polymerization: 1300) 10
0 parts by weight, plasticizer (diisononyl adipate) 30 parts by weight, epoxidized soybean oil 10 parts by weight, calcium stearate 0.5 parts by weight, zinc stearate 0.5 parts by weight, glycerin monostearate 1.5 parts by weight And 0.5 parts by weight of polyoxyethylene fatty acid alcohol ether. <Molding method> The above composition was mixed with a Henschel mixer,
Using an extruder, the obtained compound was cured for about 200 hours.
The mixture is kneaded, melted and extruded from a T-die heated to the same temperature.

D) Sample film 2 <Composition> Vinyl chloride resin (average degree of polymerization: 1300) 100
Parts by weight, 45 parts by weight of a plasticizer (dioctyl phthalate),
5 parts by weight of plasticizer (tricresyl phosphate), 2 parts by weight of epoxy resin, 2.5 parts by weight of Ca-Ba-Zn-based stabilizer, 2 parts by weight of antifogging agent (sorbitan monostearate), fluorine-based surfactant 0.1 parts by weight of an agent and 0.05 parts by weight of an ultraviolet absorber (Tinuvin P). <Molding method> The above composition is mixed using a Henschel mixer, and the obtained compound is heated and kneaded at 180 ° C using a Banbury mixer and a mixing roll to form a film using an L-type calender.

(2) Self-adhesive force (g / cm ² ) a) Measuring device Autograph manufactured by Shimadzu Corporation, type: S-500.
A sheet for holding a sample film; a soft vinyl chloride sheet (size: width 5 cm, length 8 cm, thickness 0.5 cm). b) Test conditions Load cell: 50 kg, crosshead speed: 500
mm / min, measurement temperature: 23 ± 2 ° C., relative humidity: 65 ± 5
% C) Measurement method Two sample films and two holding sheets are prepared. A sample film is stuck on one side of each holding sheet. At this time, the film is applied so as to overlap the periphery of the other side of the holding sheet, and wrinkles do not enter the sample film. The two holding sheets are overlapped with each other at a length of 5 cm in such a manner that the sample films face each other, and a 10 kg weight is placed thereon for 10 seconds.
The stacked holding sheets are fixed to the upper and lower chucks of the autograph, the autograph is started, and the measurement is continued until the overlapped portion is peeled off. The maximum stress value (A: unit; g) required for peeling is read from the measurement chart paper. And divided by the area superimposed maximum stress value (A) (25cm ²⁾ to calculate the self-adhesion (g / cm ^2).

(3) Deviation of the end face The roll is left for one month in an environment of a temperature of 35 ° C. and a relative humidity of 65%, and the state of the end of the roll is visually observed. The evaluation criteria are as follows. A: No deviation is observed. ：: The displacement depth is less than 1 mm, and only one displacement is observed. D: The depth of the shift is 1 mm or more, and two or more steps of shift are observed.

Example 1 <Preparation of outermost layer paper> Bleached kraft paper (basis weight: about 70 g /
m ² ), a water-soluble olefin wax (manufactured by Chukyo Yushi Co., Ltd., trade name: Polylon 393) is spray-coated at a solid content of about 4 to 5 g / m ² , and the surface is smoothed by passing between rolls at about 100 ° C. Finished. Hereinafter, this paper is referred to as MS paper 1
(Thickness: 0.1 mm). It was used as the outermost layer paper of the shaft core paper tube.

<Manufacture of Paper Tube> K-liner paper (thickness: 0.25 mm, basis weight: 180) was attached to the mandrel for forming the shaft core of a paper tube forming machine (Langston, USA; type: Langston).
g / m ² ) and spirally wound around the innermost layer (inner diameter: 76 m
m) was formed. A base paper for paper tube 1 (thickness: 0.5 mm) was successively spirally wound around the uppermost layer of the innermost layer to form an intermediate layer. A white liner paper (thickness:
0.25 mm, basis weight: 170 g / m ² ) was spirally wound, and the above-mentioned MS paper 1 was spirally wound on the upper layer to form the outermost layer, thereby obtaining a wound shaft paper tube. Note that an adhesive was applied between the respective layers. The inner diameter of the obtained paper tube is 76 m
m, the thickness was about 6.2 mm, and the length was 320 mm.

<Manufacture of a roll>
Soft plastic film (thickness:
15 μm) at a winding speed of about 100 m / min. Cut both ends of the rolled material with a slitter,
Soft vinyl chloride resin film with a film width of 300 mm, a winding layer thickness of about 40 mm, and a film length of 1000 m (made by Mitsui Chemicals Platech Co., Ltd., food packaging film, trade name: high wrap, automatic packaging machine, brand name: SAS equivalent product)
Was obtained. The self-adhesive strength of the obtained film, the friction angle between the obtained film and the outermost layer of the paper tube, and the deviation of the end face of the roll were evaluated by the above-mentioned methods, and the results are shown in [Table 1]. The evaluation of the friction angle was based on the method of the sample film 1.

This soft plastic film was added to 100 parts by weight of a vinyl chloride resin (average degree of polymerization: 1300).
Plasticizer (diisononyl adipate) 30 parts by weight, epoxidized soybean oil 10 parts by weight, calcium stearate 0.5
Parts by weight, 0.5 parts by weight of zinc stearate, 1.5 parts by weight of glycerin monostearate, and 0.5 parts by weight of polyoxyethylene fatty acid alcohol ether are mixed with a Henschel mixer, and the obtained compound is subjected to known extrusion molding. Using a machine, melt film formation was performed from a T-die heated to about 200 ° C., followed by cooling and molding.

Example 2 <Manufacture of paper tube> The intermediate layer was formed of a paper tube base paper 2 (thickness: 0.85
mm), and 6 layers are further formed thereon using a paper tube base paper 3 (thickness: 0.58 mm), and the interlayer between the intermediate layer and the outermost layer is formed with K liner paper. Forming
A roll-up core paper tube was manufactured in the same manner as in Example 1, except that the inner diameter of the paper tube was 60 mm, the thickness was 10 mm, and the length was 3100 mm.

<Manufacture of Roll> Using the same paper tube as in Example 1, a soft plastic film (thickness: 100 μm, width: about 3100 mm) formed by a calender method was wound. The both ends of the roll are cut with a slitter, and the film width is 3000 mm and the winding layer thickness is about 90 m.
m and a roll length of 500 m of a soft vinyl chloride resin film (a coating material for agricultural use, manufactured by Mitsui Chemicals Platec Co., Ltd., trade name: equivalent to Mitsui Agricultural Biological Clear Cut). The self-adhesive strength of the obtained film, the friction angle between the obtained film and the outermost layer of the paper tube, and the deviation of the end face of the roll were evaluated in the same manner as in Example 1, and the results are shown in [Table 1]. The evaluation of the friction angle was based on the method of the sample film 2 described above.

This plastic film is composed of 45 parts by weight of a plasticizer (dioctyl phthalate), 5 parts by weight of a plasticizer (tricresyl phosphate), and 2 parts by weight of an epoxy resin based on 100 parts by weight of a vinyl chloride resin (average degree of polymerization: 1300). Parts, 2.5 parts by weight of a Ca-Ba-Zn-based stabilizer, 2 parts by weight of an antifogging agent (sorbitan monostearate), 0.1 part by weight of a fluorine-based surfactant, and an ultraviolet absorber (tinuvin P)
0.05 parts by weight were mixed with a Henschel mixer, and the obtained compound was heated and kneaded with a Banbury mixer and a mixing roll, formed into a film with an L-type calender, and cooled.
After passing through a winding machine, it was made into a roll-shaped roll.

Example 3 <Preparation of outermost layer paper> Bleached kraft paper (basis weight: about 35 g /
m ² ) is spray-coated with about 0.8 to 1 g / m ² of a solid content of an aqueous emulsion silicone (trade name: TSW831 manufactured by Toshiba Silicone Co., Ltd.) on one surface of the m2). Finished smoothly. Hereinafter, this paper is referred to as S paper.

<Manufacture of Paper Tube and Roll> A paper tube and a roll were manufactured in the same manner as in Example 2 except that the above-mentioned S paper was used as the outermost layer paper of the paper tube. The self-adhesive force of the obtained film, the friction angle between the obtained film and the outermost layer of the paper tube, and the end face deviation of the roll were evaluated in the same manner as in Example 2, and the results are shown in [Table 1].

Example 4 <Preparation of outermost layer paper> A water-soluble olefin wax (manufactured by Chukyo Yushi Co., Ltd., trade name: Polylon 393) was used and spray-coated at a solid content of about 9 to 10 g / m ² , except that An outermost layer paper was obtained in the same manner as in Example 1. Hereinafter, this paper is referred to as M
Called S paper 2. <Manufacture of paper tubes and rolls>
A paper tube and a roll were manufactured in the same manner as in Example 1 except that S paper 2 was used. The self-adhesive strength of the obtained film, the friction angle between the obtained film and the outermost layer of the paper tube, and the deviation of the end face of the roll were evaluated in the same manner as in Example 1, and the results are shown in [Table 1].

Comparative Example 1 <Manufacture of Paper Tube and Rolled Material> As the outermost layer paper of the paper tube, MS was used.
Bleached kraft paper instead of paper 1 (single gloss, thickness: 0.1mm,
The basis weight: 65 g / m ² ), except that a paper tube and a roll were manufactured in the same manner as in Example 1. The self-adhesive strength of the obtained film, the friction angle between the obtained film and the outermost layer paper of the paper tube, and the deviation of the end face of the roll were evaluated in the same manner as in Example 1, and the results are shown in [Table 1].

Comparative Example 2 <Manufacture of Paper Tube and Scroll> As the outermost layer paper of the paper tube, MS was used.
Bleached kraft paper (single gloss, thickness: 0.1m instead of paper 1)
m, basis weight: 65 g / m ² ), except that a paper tube and a roll were produced in the same manner as in Example 2. The self-adhesive strength of the obtained film, the friction angle between the obtained film and the outermost layer paper of the paper tube, and the deviation of the end face of the roll were evaluated in the same manner as in Example 2, and the results are shown in [Table 1].

Comparative Example 3 <Preparation of outermost layer paper> Release paper (manufactured by Oji Chemical Co., Ltd., trade name: Sepak OPT-64, high quality paper, basis weight: 64 g /
m ² , thickness: 90 ± 10 μm, polyethylene laminate, silicone coating). <Manufacture of paper tube and roll> A paper tube and roll were manufactured in the same manner as in Example 1 except that the release paper was used as the outermost layer paper. The self-adhesive strength of the obtained film and the friction angle between the obtained film and the outermost layer paper of the paper tube were evaluated in the same manner as in Example 1, and the results are shown in [Table 1]. When the film was wound around the paper tube, the film protruded from the paper tube, and a regular roll-shaped roll was not obtained.

[0040]

[Table 1]

<Explanation of Table Symbols> (1) F1: Soft vinyl chloride resin film for food packaging,
Self-adhesive strength: 615 g / cm ² , manufactured by Mitsui Chemicals Platech Co., Ltd., trade name: High Wrap SAS equivalent, 1000
m volume. (2) F2: soft vinyl chloride resin film for agricultural covering material, self-adhesive strength: 263 g / cm ² , manufactured by Mitsui Chemicals Platech Co., Ltd., trade name: transparent Kirikit equivalent, 500 m
roll. (3) *: When the film is wound on the paper core, the film protrudes from the paper core, so that a regular roll-shaped roll cannot be obtained, and measurement of the end face deviation is not possible.

Practical evaluation test 1 <Packaging test> Using the roll-shaped roll of the food packaging film obtained in Example 1, a tray packaging test was performed by an automatic packaging machine. As a result of successively packing about 1200 packs, the film was smoothly removed from the rolled material, and no trouble was observed. The tester and packaged items are as follows. Automatic packaging machine: Teraoka Seiko Co., Ltd., model: AW-2600JR, tray: Pearl China Chemical Co., Ltd., EL-12-30, dimensions: width; 19
5 mm, depth; 122 mm, height; 30 mm, packaged material: about 300 g of meat / tray.

Practical evaluation test 2 <Adhesion processing test> A width joint adhesion processing test was performed using two roll-shaped rolls of the agricultural covering material film obtained in Example 2. As a result, the film was unwound from the two rolls without any problem, and the roll length was 500 m.
Until the end, the joint processing of the two films could be performed without any trouble. The tester and main conditions are as follows.
Bonding machine: Queen Light Electronics Co., Ltd., high frequency bonding machine LAM-S303, bonding speed: 10 m /
min. .

[0044]

The winding shaft core paper tube according to the present invention comprises:
By adjusting the friction angle between the paper on the outermost layer of the paper tube and the plastic film, the roll-shaped roll using the same suppresses the end face deviation. Therefore, when unrolling the film from the roll, the film can be taken out smoothly. For example, in a food packaging film, if a roll-shaped roll using the shaft core paper tube of the present invention is used, when packaging by an automatic packaging machine, troubles when unrolling the film from the roll are avoided, Loss, work time loss, etc. are reduced. In addition, in the field of agricultural coating films, it is possible to prevent the occurrence of processing defects due to disturbance of the width joint surface when performing width joint processing of two or three rolls. Moreover, the winding shaft core paper tube of the present invention can be collected as used paper, and has a useful effect in terms of effective use of resources.

Continuation of the front page (72) Inventor Takayuki Isobe 2-1-1 Tango-dori, Minami-ku, Nagoya City, Aichi Prefecture Inside Mitsui Chemicals Platech Co., Ltd. (72) Inventor Yoshihiko Hirate 2-153-1, Sotobori, Komaki City, Aichi Prefecture Marupira Paper Works Co., Ltd. Company F-term (reference) 3F058 AA03 AB01 BB01 BB05 CA01 CA06 DA04 DB05

Claims (6)

[Claims] 1. A wound core paper tube formed by spirally winding a base paper for a paper tube in a layered manner, wherein at least the outermost layer of the paper tube is coated with at least one treatment agent. Winding shaft core paper tube formed of. 2. A treatment agent comprising at least one selected from a water-soluble olefin wax and an aqueous emulsion silicone.
The paper tube according to claim 1, which is a compound. 3. The coating amount of the treatment agent is from 0.5 to 0.5 as a solid content.
^{2. The} take-up shaft core paper tube according to claim 1, wherein the weight is 25 g / m ² . 4. The paper tube according to claim 1, wherein the friction angle between the outermost layer of the paper tube and the plastic film is 18 to 40 degrees. 5. An inner diameter of 20 to 150 mm and a wall thickness of 2 to 15 m
5. The take-up shaft core paper tube according to claim 1, wherein the length is 150 to 15000 mm. 6. A roll-shaped roll obtained by winding a plastic film into a roll around the take-up shaft core paper tube according to any one of claims 1 to 5.