JP2000120942A - Wound pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To additionally provide flexibility of polyethylene while maintaining flame resistance and an adhesive bonding characteristic of hard polyvinyl chloride by constructing a polyvinyl chloride resin composition serving as a material for a pipe of a specific graft polymer and a plurality of blend polymers consisting of the same kind or varied kinds of elastomers or the like. SOLUTION: A polyvinyl chloride resin composition serving as a material for a pipe is formed of one selected from a group consisting a graft polymer A formed by graft-polymerizing vinyl chloride monomer with an elastomer, a blend polymer B constructed of an elastomer, and polyvinyl chloride resin, a blend polymer C constructed of the graft polymer A and polyvinyl chloride resin, a blend polymer D constructed of the graft polymer A and the same kind or varied kinds of elastomers, and a blend polymer E constructed of the graft polymer A, polyvinyl chloride resin, and the same kind or varied kinds of elastomers. In this case, as an elastomer, ethylene-vinyl acetate copolymer or a mixture of polyethylene and polyvinyl acetate is used, for example.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used for a wound tube, particularly for a sheath tube of an electric wire, an optical fiber cable or the like. And the connection unit can be constructed by simple adhesive bonding, hand holes or manholes can be connected with one piece without the use of joints, stored and transported in a rolled state, and pulled out at the time of construction and used as a straight tube About pipes.

[0002]

2. Description of the Related Art When laying a communication network such as an electric wire or an optical fiber cable, a rigid PVC pipe, a polyethylene pipe, or the like having an excellent lineability such as surface smoothness and low frictional resistance is used as a sheath pipe. . Rigid PVC pipes are excellent in that they have flame retardancy and can be adhesively bonded. However, when laying as a sheath pipe, many short straight tubular pipes having a circular cross section with a length of about 2 to 5.5 m are prepared, and the ends of these pipes are sequentially connected to the pipe laying groove. The way to lay was done.
In this method, since the number of connections increases as the length of the pipeline increases, a long time is required for the connection work, and the construction period is prolonged. Furthermore, a short tube having a circular cross section has a large volume of hollow portion inside, so that the transportation efficiency is poor, and there is a problem that it takes time to procure materials and transport.

In order to solve this problem, Japanese Patent Laid-Open Publication No.
Japanese Patent No. 49364 discloses that a rigid PVC pipe is wound around a drum while being deformed into a flat cross section while being softened by heating.
After forming the long tube, lay it down on the laying surface after rewinding from the drum while reheating and softening when laying, then pressurize the softened long tube with steam from inside and expand and deform into a circular cross section There is disclosed a method for causing this to occur. However, this method requires equipment and man-hours for heating and softening the tube twice, at the time of winding and unwinding. Handling was difficult due to the use of steam.

Further, as disclosed in Japanese Patent Application Laid-Open No. 9-133270, polyethylene pipes are often used for laying long pipe lines because they can be flexible long pipes. However, due to poor flame retardancy, there is a danger that when the pipeline is exposed to a fire, a communication network such as an electric wire and an optical fiber cable inside the sheath tube may be burned. Further, when an additional tube is required, there is a disadvantage that simple adhesive bonding cannot be performed.

Japanese Patent Application Laid-Open No. 58-131025 discloses a technique relating to an electric welding apparatus having a thermoplastic material as a main body. This apparatus melts a thermoplastic material as a main body and welds a member to be welded. However, in this method, an apparatus for bonding and joining is complicated, and there are problems in workability, cost, and the like.

[0006]

SUMMARY OF THE INVENTION In view of the above, it is an object of the present invention to maintain the flame retardancy and adhesive bonding properties of rigid PVC, and also have the flexibility of polyethylene, and store and transport it in a wound state. It is an object of the present invention to provide a wound tube which can be drawn out during construction and used as a straight tube.

[0007]

The rolled tube of the present invention is a rolled tube formed by forming a vinyl chloride resin composition and then rolling the same, wherein the vinyl chloride resin The composition comprises a graft (A) obtained by graft-polymerizing a vinyl chloride monomer onto an elastomer, a blend (B) comprising an elastomer and a vinyl chloride resin, and the above graft (A) and a vinyl chloride resin. A blend (C), a blend (D) comprising the above-mentioned graft (A) and the same or different elastomer as the above-mentioned elastomer, and a same or different above-mentioned graft (A), vinyl chloride resin and the above-mentioned elastomer 1 selected from the group consisting of blends (E) consisting of
It is characterized by being of a kind. Hereinafter, the present invention will be described in detail.

[0008] The rolled tube of the present invention is a rolled tube formed by winding a vinyl chloride resin composition after molding, and the vinyl chloride resin composition is formed into an elastomer. A graft (A) obtained by graft polymerization of a vinyl chloride monomer, a blend (B) comprising an elastomer and a vinyl chloride resin, a blend (C) comprising the above graft (A) and a vinyl chloride resin, A blend (D) comprising the above graft (A) and the same or different elastomer from the above elastomer, and a blend comprising the above graft (A), a vinyl chloride resin and the same or different elastomer from the above elastomer It consists of one kind selected from the group consisting of the body (E).

The above-mentioned elastomer is a general term for polymer materials having flexibility at room temperature, and is not particularly limited. For example, ethylene-vinyl acetate copolymer (EVA), ethylene- ( (Meth) acrylate copolymer (EA), acrylonitrile-butadiene copolymer (NBR), chlorinated polyethylene (CPE), (meth) acrylate copolymer (AC), methyl methacrylate-styrene- Butadiene copolymer (MB
At least one elastomer selected from S), chlorosulfonated polyethylene (CSPE), polyurethane (PU) and the like, or a mixture thereof is used.

The EVA is not particularly limited. For example, when the vinyl acetate content is 10 to 80% by weight and JIS
And those having a melt flow rate (MFR) value of 0.5 to 300 measured according to K 6760.

The EA is not particularly limited. For example, when the type of acrylate is ethyl acrylate,
Examples thereof include butyl acrylate and 2-ethylhexyl acrylate having an acrylate content of 10 to 80% by weight and an MFR value of 0.1 to 100.

The above NBR is not particularly limited, and examples thereof include those having an acrylonitrile content of 20 to 50% by weight and a Mooney viscosity (ML _{1 + 4} : 100 ° C.) of 10 to 200.

The above CPE is not particularly limited. For example, the chlorination degree is 20 to 55% by weight, and the MFR value is 0.1 to 55%.
100 and the like.

The AC is not particularly limited. For example, as an acrylate ester, ethyl acrylate, n-propyl acrylate, butyl acrylate, hexyl, and the like having a glass transition temperature (hereinafter, referred to as Tg) of a homopolymer of -20 ° C. or less are used. Acrylates, polymers mainly composed of monomers such as 2-ethylhexyl acrylate,
Examples include those in which a monomer having a high Tg such as methyl methacrylate is formed into a multilayer structure by copolymerization or multi-stage polymerization, and those in which a polymer has a crosslinked structure using a monomer having two or more functionalities. The average particle size is not particularly limited,
Generally, those having a size of 0.01 to 5 μm are exemplified.

The MBS is not particularly restricted but includes, for example, 50 to 90% by weight of a butadiene component, 5 to 45% by weight of a methyl methacrylate component and 5 to 4% by weight of a styrene component.
5% by weight. The average particle size is not particularly limited, and generally includes a particle having a size of 0.01 to 5 μm.

The CSPE is not particularly limited. For example, the chlorine content is 20 to 50% by weight, the sulfur content is 0.5 to 2.0% by weight, and the Mooney viscosity (ML _{1 + 4} : 10
0 ° C) of 10 to 200.

The PU is not particularly restricted but includes, for example, a linear polymer obtained by reacting a polyfunctional active hydrogen compound such as a polyol with an isocyanate compound of the whole reaction system, or a PU having a partially crosslinked structure. And generally, caprolactone type, adipate type, ether type and the like.

The above-mentioned vinyl chloride monomer is a vinyl monomer containing vinyl chloride as a main component, and may contain a monomer copolymerizable with vinyl chloride in addition to vinyl chloride. The monomer copolymerizable with the vinyl chloride is not particularly limited, and includes, for example, α-olefins such as ethylene, propylene and butylene; vinyl esters such as vinyl acetate and vinyl propionate; vinyl ethers such as ethyl vinyl ether and butyl vinyl ether Kind;
Acrylic esters such as methyl acrylate, butyl acrylate, and hydroxyethyl acrylate; methacrylic esters such as methyl methacrylate, butyl methacrylate, and hydroxyethyl methacrylate; aromatic vinyls such as styrene and α-methyl styrene; Vinyl halides such as vinylidene chloride and vinylidene chloride; and N-substituted maleimides such as N-phenylmaleimide and N-cyclohexylmaleimide. These may be used alone or in combination of two or more.

The content of the monomer copolymerizable with vinyl chloride is appropriately used depending on the purpose.
The following is preferred. If the content exceeds 20% by weight, the inherent properties of the vinyl chloride resin will be lost.

The graft copolymerization of the above-mentioned elastomer and the above-mentioned vinyl chloride monomer is not particularly limited, and can be carried out according to a conventional method. For example, a suspension polymerization method, an emulsion polymerization method, a solution polymerization method and the like can be mentioned, and generally, a suspension polymerization method is used. In the suspension polymerization method, a dispersant, a polymerization initiator and the like are used.

The dispersant is not particularly restricted but includes, for example, methylcellulose, ethylcellulose, hydroxypropylmethylcellulose, polyvinyl alcohol and partially saponified products thereof, gelatin, polyvinylpyrrolidone,
Starch, maleic anhydride-styrene copolymer, and the like. These may be used alone or in combination of two or more.

The polymerization initiator is not particularly limited.
For example, organic peroxides such as lauroyl peroxide, t-butyl peroxypivalate, diisopropyl peroxy dicarbonate, dioctyl peroxy dicarbonate, t-butyl peroxy neodecanoate, α-cumyl peroxy neodecanoate, etc. Class; 2,2-
Azobisisobutyronitrile, 2,2-azobis-2,
An azo compound such as 4-dimethylvaleronitrile and the like can be mentioned.

Further, in the above suspension polymerization method, a pH adjuster, an antioxidant and the like may be used as necessary.

As the above suspension polymerization method, specifically, the following method is used. That is, pure water, a dispersant, a polymerization initiator, and an elastomer are charged into a polymerization vessel equipped with a temperature controller and a stirrer, and air is removed from the polymerization vessel by a vacuum pump, and then vinyl chloride is introduced into the polymerization vessel. After the elastomer is dispersed or dissolved in vinyl chloride, the temperature is raised and polymerization is started at a desired polymerization temperature. After completion of the reaction, the remaining monomer is discharged out of the polymerization vessel to obtain a slurry. After dehydration with a dehydrator, drying is performed to obtain a graft body (A).

The degree of polymerization of the vinyl chloride component comprising the vinyl chloride monomer in the graft (A) is 40.
0 to 2500 is preferred. More preferably, 600-1
600. If the degree of polymerization is less than 400, the durability will be poor. If the degree of polymerization exceeds 2500, the melt viscosity of the resin will be high and the moldability will be poor.

The above-mentioned vinyl chloride resin is obtained by polymerizing the above-mentioned vinyl chloride monomer. The content of the monomer copolymerizable with vinyl chloride is the same as the content described above. The degree of polymerization of the vinyl chloride resin is the same as the degree of polymerization of the vinyl chloride component.

The method of blending the elastomer, the vinyl chloride resin and the graft is not particularly limited, and it can be performed by a hot blending method or a cold blending method, and is blended with various compounding agents described in detail later. You can also.

The content of the vinyl chloride component and the vinyl chloride resin component in the vinyl chloride resin composition is 6%.
0 to 85% by weight. If the content is less than 60% by weight, sufficient strength cannot be obtained, and the wire or optical fiber cable may be ruptured when the wire or the optical fiber cable is passed by air pressure.
If the amount exceeds the weight percentage, the flexibility of the wound tube is insufficient, and the tube buckles when the tube is wound.

The wound tube of the present invention is formed by winding the above-mentioned vinyl chloride resin composition after molding.

The above-mentioned vinyl chloride resin composition may contain, if necessary, a stabilizer, a stabilizing aid, a lubricant, a processing aid, an ultraviolet absorber, a light stabilizer, an antioxidant, a pigment, a plasticizer, and a filler. And the like are added and molded.

The stabilizer is not particularly restricted but includes, for example, dimethyltin mercapto, dibutyltin mercapto, dioctyltin mercapto, dibutyltin malate, dibutyltin maleate polymer, dioctyltin malate, dioctyltin maleate polymer, dibutyltin laurate And tin-based stabilizers such as dibutyltin laurate polymer; lead white, basic lead sulfite, dibasic lead sulfite, tribasic lead sulfate, dibasic lead phosphite, silica gel coprecipitated silicate, stearin Lead-based stabilizers such as lead oxide, lead benzoate, dibasic lead stearate, and lead naphthenate; metal soaps such as calcium stearate, barium stearate, and zinc stearate; calcium-zinc-based stabilizer, and barium-zinc-based Stabilizers, barium-cadmium stabilizers, hydrotalcite, zeolites and the like It is. These may be used alone or in combination of two or more.

The stabilizing aid is not particularly limited.
For example, epoxidized soybean oil, epoxidized linseed oil, epoxidized tetrahydrophthalate, epoxidized polybutadiene, phosphate esters and the like can be mentioned. These may be used alone or in combination of two or more.

The lubricant is not particularly restricted but includes, for example, montanic acid wax, paraffin wax, polyethylene wax, stearic acid, stearyl alcohol, butyl stearate and the like. These may be used alone or in combination of two or more.

The processing aid is not particularly restricted but includes, for example, (meth) acrylates such as methyl (meth) acrylate, ethyl (meth) acrylate and butyl (meth) acrylate.
Acrylate homopolymer; copolymer of two or more monomers selected from the above (meth) acrylate homopolymers; copolymer of (meth) acrylate and vinyl monomers such as styrene, vinyltoluene, and acrylonitrile And the like. These may be used alone or in combination of two or more.

The ultraviolet absorber is not particularly limited, and examples thereof include salicylate-based, benzophenone-based, benzotriazole-based, and cyanoacrylate-based ultraviolet absorbers. These may be used alone or in combination of two or more.

The light stabilizer is not particularly restricted but includes, for example, hindered amine light stabilizers.
These may be used alone or in combination of two or more.

The antioxidant is not particularly limited.
For example, phenolic antioxidants and the like can be mentioned. These may be used alone or in combination of two or more.

The above-mentioned pigments are not particularly restricted but include, for example, organic pigments such as azo, phthalocyanine, sulene and dye lakes; oxides, molybdenum chromates, sulfides / selenides, ferrocyanides. And other inorganic pigments. These may be used alone or in combination of two or more.

The plasticizer is not particularly restricted but includes, for example, dibutyl phthalate, di-2-ethylhexyl phthalate, di-2-ethylhexyl adipate and the like. These may be used alone or in combination of two or more.

The filler is not particularly restricted but includes, for example, silica, diatomaceous earth, alumina, zinc oxide, titanium oxide, calcium oxide, magnesium oxide, iron oxide, tin oxide, antimony oxide, ferrites, calcium hydroxide, water Magnesium oxide, aluminum hydroxide, basic magnesium carbonate, calcium carbonate, magnesium carbonate, zinc carbonate, barium carbonate, dawsonite, hydrotalcite, calcium sulfate, barium sulfate, gypsum fiber, calcium silicate, talc, clay, mica, montmorillonite , Bentonite, activated clay, sepiolite, imogolite, sericite, glass fiber, glass beads, silica balun, aluminum nitride, boron nitride, silicon nitride, carbon black, graphite, carbon fiber, carbon balun, charcoal powder Various metal powders, potassium titanate, magnesium sulfate (MOS), titanate zirconium lead, aluminum borate, molybdenum sulfide, silicon carbide, stainless steel fiber, zinc borate, various magnetic powder,
Slag fibers, fly ash, dewatered sludge, and the like are included. These may be used alone or in combination of two or more.

The order and method of mixing the above-mentioned various compounding agents with the above-mentioned vinyl chloride resin composition are not particularly limited, and any method can be adopted, and a method by hot blending or a method by cold blending may be used.

The method for molding the mixture of the vinyl chloride resin composition and the various compounding agents is not particularly limited. For example, the above-mentioned components may be mixed as powder or pellets.
Also, as a mixture thereof, a single screw extruder, a twin screw extruder,
The mixture can be kneaded using a kneading device such as a Banbury mixer, a kneader mixer, or a mixing roll, and can be formed by any conventionally known method. Generally, a method of molding using an extruder is used.

The method for winding the wound tube of the present invention is not particularly limited.
As shown in the publication, there is a method in which the end of a tube is fixed to a winding drum and the tube is continuously wound.

The rolled tube according to the second aspect of the present invention is a rolled tube obtained by forming a vinyl chloride resin composition and then rolling the same, wherein the vinyl chloride resin composition is an elastomer. 15 to 40% by weight of vinyl chloride monomer 85 to 60
A graft body (A-1) obtained by graft polymerization of
15 to 40% by weight of elastomer and vinyl chloride resin 85
A blend (B-2) of from about 60 to about 60% by weight, and a graft (A-2) obtained by graft polymerization of less than 85% by weight to more than 55% by weight of a vinyl chloride monomer to more than 45% by weight and more than 15% by weight of an elastomer. (C) having a total elastomer content of 15 to 40% by weight, comprising a rubber and a vinyl chloride resin;
Less than 60% by weight of vinyl chloride monomer to less than 9% by weight
5% by weight or less of a graft (A-
3) and a blend (D) having a total elastomer content of 15 to 40% by weight composed of the elastomer and the same or different elastomer, and the graft (A-
3) a mixture of one selected from the group consisting of a blend (E) having a total elastomer content of 15 to 40% by weight, comprising a vinyl chloride resin and the same or different elastomer as the above elastomer. It is.

As the elastomer, vinyl chloride monomer and vinyl chloride-based resin of the present invention 2, the same as those described above can be used. In addition, the same method as the above-described method can be used for the graft polymerization method and the blending method of the second invention.

The amount of the elastomer component in the vinyl chloride resin composition of the present invention 2 is 15 to 40% by weight. When the amount of the elastomer component is less than 15% by weight, the flexibility of the wound tube is insufficient, the tube buckles when the tube is wound, and when the amount of the elastomer component exceeds 40% by weight, Sufficient strength is not obtained, and there is a possibility that the wire or optical fiber cable may burst when the wire or the optical fiber cable is passed by pneumatic feeding.

[0047]

The present invention will be described in more detail with reference to the following examples, but the present invention is not limited to these examples.

Example 1 Preparation of Graft (A) Acrylic Copolymer (Emulsion Polymerization) In a 10 liter reactor equipped with a stirrer and a reflux condenser, 4 kg of pure water and 24 g of ammonium persulfate as a polymerization initiator
(10% aqueous solution) was added, and the inside of the vessel was replaced with nitrogen, and then the temperature inside the reactor was raised to 75 ° C. with stirring. 1.5 kg of pure water, 50 g of Hytenol N-08 (trade name) (manufactured by Daiichi Kogyo Seiyaku Co., Ltd.) (10% aqueous solution) as an emulsifier,
N-butyl acrylate (n
BA) was prepared from 2.4 kg, and 10 g of trimethylolpropane triacrylate (TMPA) as a polyfunctional monomer. The emulsion monomer was dropped at a constant dropping rate into the reaction vessel after the temperature was raised. The dropping of all the emulsified monomers was completed in 3.0 hours, and thereafter, stirring was continued for 1 hour, and then the polymerization was terminated to obtain an acrylic copolymer latex having a solid content of 30% by weight.

Preparation of Graft (Graft Copolymerization) Then, 7.5 kg of pure water and 3.2 kg of the obtained acrylic copolymer latex (acryl copolymer solid) were placed in a 15-liter polymerization vessel equipped with a stirrer and a jacket. Weight 0.96 kg), 300 g of a 3% aqueous solution of partially saponified polyvinyl alcohol (Kuraray Co., Ltd., Kuraray Poval L-8 (trade name)) as a dispersant, t-butyl peroxydecaneate and α-cumene as polymerization initiators 1 g of luperoxydecane was added, and the air in the reactor was exhausted by a vacuum pump.
8 kg were added. The temperature of the reactor was raised to 64 ° C. to initiate polymerization. The reaction was terminated when the polymerization rate of the vinyl chloride monomer was 80%, and an antifoaming agent (Toray Silicon SH5510, manufactured by Toray Industries, Inc.) was used.
(Trade name)) was added under pressure. Thereafter, unreacted vinyl chloride monomer was removed, and further dehydration drying was performed to obtain a graft resin having an elastomer content of 30% by weight in the graft resin. Table 1 shows the degree of polymerization of the obtained graft resin.
It described in.

Molding of Wound Tube The obtained graft resin 1 was used to form a wound tube.
00 parts by weight, 1.5 parts by weight of dibutyltin mercapto (ONZ-41F (trade name) manufactured by Sankyoki Co., Ltd.) as a stabilizer,
0.5 parts by weight of a montanic acid ester wax (manufactured by Hoechst, WAX-OP (trade name)) as an internal / external lubricant;
As an external lubricant, 0.5 parts by weight of oxidized polyethylene wax (manufactured by Mitsui Chemicals, Inc., HIWAX220RKT (trade name)) was blended with a Henschel mixer at a ratio of 0.5 part by weight to prepare a compounded powder. Furthermore, this compounded powder was adjusted to a cylinder temperature of 170 ° C. using a 30 mm twin extruder, and pelletized by a pelletizer. Using the obtained pellets as a raw material, using a twin-screw extruder with a diameter of 90 mm (SLM-90 (trade name) manufactured by Sekisui Koki Co., Ltd.)
The resin temperature is kept at 190 ° C, and the polyvinyl chloride pipe for sewage described in JIS K 6741 (plain-end straight pipe V
U50: 50 mm inner diameter). However, in order to use a wound tube, the length per tube was set to 15 m.

Evaluation method (1) Winding evaluation It was evaluated whether the obtained tube could be wound around a drum having a body diameter of 1.6 m. Those that could be wound without buckling were indicated by ○, and those that buckled and could not be wound on the drum were indicated by x, and the results are shown in Table 1. (2) Evaluation of Flame Retardancy In accordance with the UL94V standard, a sample was cut out from the obtained wound tube, and its flame retardancy was evaluated. When the evaluation result achieved 94V-0, it was shown as 94V-0, and the results are shown in Table 1. When the evaluation result achieved 94V-0, it was determined that the composition had sufficient flame retardancy. (3) Evaluation of Adhesion The obtained pellets were kneaded with a roll at 180 ° C. for 3 minutes, and then heated and cooled with a press machine at 200 ° C. to form a 3 mm plate. A test piece of 10 mm × 50 mm was cut out from this plate and adhered to the shape as shown in FIG. 1 using an adhesive (Esdine # 73 (trade name) manufactured by Sekisui Chemical Co., Ltd.), and 23 ° C., 24 hours After standing, the stress until the bonded surface was peeled off was measured using a tensile strength tester, and the measured value was taken as the adhesive strength. The results are shown in Table 1.

Example 2 The grafted product (A) was prepared in the same manner as in Example 1, except that the amount of the acrylic copolymer to be grafted onto the vinyl monomer was 1.87 kg (solid content: 0.56 kg). Various evaluations were made. The results are shown in Table 1.

Examples 3 to 10 Graft (A) Various evaluations were carried out in the same manner as in Example 1 except that the type and amount of the elastomer to which the vinyl monomer was grafted were as shown in Table 1. The results are shown in Table 1.

[0054]

[Table 1]

In the table, AC1 is the acrylic copolymer synthesized in Example 1, AC2 is the acrylic copolymer synthesized in Example 2, and AC3 is Kaneace FM-21. (Product name) (Average particle size after dispersion: 0.1 to 1)
EVA is Evaflex 45LX (trade name) (vinyl acetate content: 45% by weight, MFR3, manufactured by Du Pont-Mitsui Chemicals).
A is Evaflex EEA A-709 (trade name)
(MFR25, manufactured by Mitsui Dupont Chemical Co., Ltd.)
BR is JSR PN30A (trade name) (acrylonitrile content 35% by weight, ML _{1 + 4} (100 ° C.): 4
2, manufactured by Nippon Synthetic Rubber Co., Ltd., and CPE refers to Eraslen 351A (trade name) (chlorine content 35 wt%, MFR
2, Showa Denko KK), and MBS is BTA-75.
1 (trade name) (average particle size of 0.1 to 2 μm after dispersion, manufactured by Kureha Chemical Co., Ltd.), and CSPE is Hypalon 40 (trade name) (chlorine content 35 wt%, sulfur content 1.1 w
t%, ML _{1 + 4} (100 ° C.): 30, manufactured by Tosoh Corporation), and PU is Pandex 500E (trade name) (caprolactone-based, manufactured by Dainippon Ink and Chemicals, Inc.).

Example 11 Blend (B) Polymerization degree: 1000 polyvinyl chloride (Tokuyama Sekisui Kogyo Co., Ltd., T
S-1000R (trade name) 75% by weight, Evaflex 45LX (trade name) (vinyl acetate content 45% by weight,
MFR3, manufactured by Du Pont-Mitsui Chemicals Co., Ltd.) to obtain a vinyl chloride resin composition mixed at a ratio of 25% by weight. To 100 parts by weight of the obtained vinyl chloride resin composition, dibutyltin mercapto (ONZ-
41F (trade name) 1.5 parts by weight, a montanic acid ester wax (WAX, manufactured by Hoechst Co., Ltd.)
-OP (trade name)) 0.5 parts by weight, oxidized polyethylene wax (HIWAX220, manufactured by Mitsui Chemicals, Inc.) as an external lubricant
RKT) was blended at a ratio of 0.5 parts by weight with a Henschel mixer to prepare a blended powder. In addition, this blended powder
Using a mm twin extruder, the cylinder temperature was adjusted so that the resin temperature became 170 ° C., and pelletized with a pelletizer. Using the obtained pellets as a raw material, a diameter of 90 mm
The resin temperature was kept at 190 ° C. using a twin screw extruder (SLM-90 (trade name) manufactured by Sekisui Koki Co., Ltd.)
A vinyl chloride pipe for sewage described in K 6741 (plain-end straight pipe VU50: inner diameter 50 mm) was molded. However, in order to use a wound tube, the length per tube was set to 15 m. The obtained tube was evaluated in the same manner as in Example 1. The results are shown in Table 2.

Examples 12 to 19 Various evaluations were performed in the same manner as in Example 1 except that the blend (B) was blended with the elastomer and the vinyl chloride resin in the types and amounts shown in Table 2. . The results are shown in Table 2.

[0058]

[Table 2]

In the table, St-PVC is TS-1000.
R (trade name) (polymerization degree 1000, manufactured by Tokuyama Sekisui Industry Co., Ltd.), and PVC is VE-T (trade name) (polymerization degree 700, ethylene content 8% by weight, manufactured by Tokuyama Sekisui Industry Co., Ltd.) It is.

Examples 20 to 29 Blend (C) Example 1 was repeated except that the graft resin prepared in Examples 1 and 3 to 10 and the vinyl chloride resin were blended in the types and amounts shown in Table 3. Various evaluations were performed in the same manner as described above. The results are shown in Table 3.

[0061]

[Table 3]

Examples 30 to 47 Blends (D) Same as Example 1 except that the graft resins and elastomers prepared in Examples 1 to 10 were blended in the types and amounts shown in Tables 4 and 5. Various evaluations were made. The results are shown in Tables 4 and 5.

[0063]

[Table 4]

[0064]

[Table 5]

Examples 48-55 Blend (E) Example 1 was repeated except that the graft resin prepared in Examples 1 and 4 was blended with the elastomer and the vinyl chloride resin in the types and amounts shown in Table 6. Various evaluations were performed in the same manner as described above. The results are shown in Table 6.

[0066]

[Table 6]

Comparative Example 1 Various evaluations were performed in the same manner as in Example 1 except that only polyvinyl chloride resin TS-800E (trade name) (polymerization degree: 800, manufactured by Tokuyama Sekisui Industry Co., Ltd.) was used as the resin. went. The results are shown in Table 7.

Comparative Example 2 A polyethylene resin (HZ manufactured by Mitsui Petrochemical Co., Ltd.)
Various evaluations were performed in the same manner as in Example 1 except that only 7700M (trade name) and a density of 0.958 g / cc) were used. The results are shown in Table 7.

[0069]

[Table 7]

[0070]

According to the present invention, the wound tube of the present invention has the above-mentioned structure, so that it has the flexibility of polyethylene while maintaining the flame-retardant properties and adhesive bonding properties of rigid PVC, and the rolled state. It can be stored, transported, pulled out at the time of construction, and used in the form of a straight tube. By taking advantage of these properties, a wound pipe excellent in workability, which has not been possible with conventional hard PVC, can be suitably used for sheath pipe applications such as electric wires and optical fiber cables.

[0071]

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a method for producing a test piece used for an adhesion evaluation test of a wound tube of the present invention.

[Explanation of symbols]

 1, 2 Test piece for adhesion test 3 Adhesive layer

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (reference) C08L 101/00 C08L 101/00 F term (reference) 3H111 AA02 BA15 BA34 DA11 DB23 EA04 4J002 AC072 AC073 BB062 BB063 BB072 BB073 BB242 BB243 BB272 BB273 BD041 BD051 BD061 BD071 BD081 BD091 BG042 BG043 BG052 BG053 BN081 BN082 BN091 BN092 BN101 BN102 BN121 BN122 BN141 BN142 BN162 BN163 BN171 BN172 BN211 BN212 CK022 CK023 FD010 FD030 FD170 GP00 GQ00 GT00 4J026 AA12 AA17 AA38 AA45 AA46 AA49 AA68 AB02 AC04 AC07 AC08 AC12 AC15 AC25 AC26 AC31 AC32 AC34 AC36 BA01 BA02 BA03 BA05 BA10 BA11 BA16 BA19 BA20 BA27 BA30 BA38 BB01 BB02 BB08 CA05 CA06 DB02 DB03 DB04 DB10 DB12 DB15 DB29 GA01 GA09

Claims (3)

[Claims] 1. A wound tube formed by winding a vinyl chloride resin composition after molding, wherein the vinyl chloride resin composition is obtained by graft-polymerizing a vinyl chloride monomer onto an elastomer. (A), a blend (B) comprising an elastomer and a vinyl chloride resin,
A blend (C) comprising the graft (A) and a vinyl chloride resin, a blend (D) comprising the graft (A) and an elastomer of the same or a different type from the elastomer, and the graft ( (A) a vinyl chloride-based resin and a blended product (E) of the same or different elastomer with the above-mentioned elastomer, which is made of one kind selected from the group consisting of: . 2. A wound tube formed by winding a vinyl chloride resin composition after molding, wherein the vinyl chloride resin composition contains 15 to 40% by weight of an elastomer in a vinyl chloride monomer. Graft product (A-1) obtained by graft polymerization of 85 to 60% by weight, elastomer 15 to 40
Blend (B) consisting of 85% to 60% by weight of a vinyl chloride resin and more than 15% by weight of an elastomer.
A graft product (A) obtained by graft-polymerizing a vinyl chloride monomer of less than 85% by weight to 55% by weight or more to 5% by weight or less.
A blend (C) having a total elastomer content of 15 to 40% by weight, comprising a vinyl chloride-based resin and a vinyl chloride monomer in an amount of from 5% by weight to less than 40% by weight and more than 60% by weight of a vinyl chloride monomer; A blend (D) having a total elastomer content of 15 to 40% by weight, comprising a graft (A-3) obtained by graft polymerization of not more than 5% by weight and an elastomer of the same or different type with the elastomer;
And a blend (E) having a total elastomer content of 15 to 40% by weight composed of the graft (A-3), a vinyl chloride resin, and the same or different elastomer as the elastomer. A rolled tube, characterized in that it is made of one of the following. 3. The elastomer is an ethylene-vinyl acetate copolymer, an ethylene- (meth) acrylate copolymer, an acrylonitrile-butadiene copolymer, a chlorinated polyethylene, a (meth) acrylate copolymer, 3. The wound roll according to claim 1 or 2, wherein the roll is at least one elastomer selected from the group consisting of methyl methacrylate-styrene-butadiene copolymer, chlorosulfonated polyethylene, and polyurethane. tube.