JPH10185015A - Resin tube - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a resin (flexible) tube having workability, flexibility and excellent electromagnetic wave shielding properties, by applying metal plating to the resin (flexible) tube which contains by a specific rate, polyolefin resin, thermoplastic elastomer, acid soluble inorganic powder and a cationic surface active agent. SOLUTION: Polyolefin resin in a resin composition used as the raw material of a resin (flexible) tube is not especially restricted, and its component in consideration of formability and plating properties is from 20 to 95 weight parts, preferably from 40 to 90 weight parts. A thermoplastic elastomer is not especially restricted, and its component in consideration of rigidity, heat resisting- properties and formability, is from 0 to 40 weight parts, preferably from 2 to 30 weight parts. Acid-soluble inorganic powder is not especially restricted, and its component in consideration of plating properties is from 5 to 40 weight parts, preferably from 8 to 30 weight parts. A cationic surface active agent is not especially restricted, and its component in consideration of plating properties, heat resisting-properties and rigidity is from 0.01 to 5 weight parts, preferably from 0.02 to 3 weight parts.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin tube, and more particularly to a resin flexible tube, and more particularly, to a polyolefin tube or pipe which retains its inherent characteristics and has excellent electromagnetic wave shielding properties and excellent productivity. More particularly, the present invention relates to a resin pipe suitable for shielding electromagnetic waves such as electric wires.

[0002]

2. Description of the Related Art In recent years, various electronic control devices (hereinafter abbreviated as electronic devices) have become widespread for industrial use, consumer use, and the like.
It often causes malfunctions of various electronic devices, which has become a social problem. In particular, obstacles caused by electromagnetic waves radiated from computers, office equipment, and the like to televisions and audio equipment have become significant. Therefore, in order to prevent the occurrence of such electromagnetic interference,
In general, not only electronic devices affected by electromagnetic waves but also electronic devices that generate electromagnetic waves are housed in a housing provided with an electromagnetic wave shield (hereinafter referred to as an EMI shield).

[0003] In addition to such electronic devices, the need for EMI shielding of electric wires has begun to be required. Further, in automobiles, which have not been very related to the related art, along with the computerization of automobiles, wiring in automobiles has been required. The need for EMI shielding is starting to shout. In addition, E of such an electric wire
As a method of coping with the MI shield, for example, a method of winding a shield material around each electric wire, a method of bundling electric wires and winding a shield material, and the like have been proposed.
This method cannot be said to be sufficiently satisfactory in terms of cost and the like.

On the other hand, as a general construction method with good workability of electric wires, a method of laying electric wires in tubes or pipes is often used. Therefore, as an efficient EMI shielding method of an electric wire, a method of plating the tube or pipe to shield the entire electric wire can be considered. However, in general, polyolefins are often used for the tubes and pipes in terms of moldability, strength, flexibility, price, and the like. Since polyolefins are nonpolar, polyolefin tubes and pipes are generally used. It was difficult to plate. Therefore, a resin (flexible) tube such as a polyolefin tube or pipe that can be plated is manufactured, and the plated one is extremely useful for EMI shielding of electric wires and the like without impairing the inherent characteristics of the tube. The development was desired.

[0005]

SUMMARY OF THE INVENTION Under such circumstances, the present invention maintains the characteristics inherent in a polyolefin resin (flexible) tube, that is, excellent processability and flexibility, and excellent EMI shielding properties. It is an object of the present invention to provide a polyolefin resin tube, particularly a resin flexible tube, suitable for EMI shielding of electric wires and the like with high productivity.

[0006]

Means for Solving the Problems The present inventors have conducted intensive studies to develop a resin (flexible) tube having the above-mentioned preferable properties.
A resin (flexible) tube using a resin composition containing a thermoplastic elastomer, an acid-soluble inorganic powder, and a cationic surfactant in a predetermined ratio can be easily plated, and the resin (flexible) can be used. (B) It has been found that a plated tube is suitable for the purpose. The present invention
It has been completed based on such knowledge. That is,
The present invention relates to (A) 20 to 95 parts by weight of a polyolefin resin, (B) 0 to 40 parts by weight of a thermoplastic elastomer,
Plating treatment was applied to a tubular molded body composed of a resin composition containing (C) 5 to 40 parts by weight of an acid-soluble inorganic powder and (D) 0.01 to 5.0 parts by weight of a cationic surfactant. The present invention provides a resin (flexible) tube characterized by the following.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The polyolefin resin as the component (A) in the resin composition used as a material of the resin (flexible) tube of the present invention is not particularly limited. For example, ethylene; propylene; butene-1; 3-methylbutene-
1; 3-methylpentene-1; 4-methylpentene-1
And α-olefin homopolymers and copolymers thereof, and copolymers thereof with other copolymerizable unsaturated monomers. Representative examples include high-, medium-, and low-density polyethylene, linear low-density polyethylene, ultra-high-molecular-weight polyethylene, polyethylenes such as ethylene-vinyl acetate copolymer, ethylene-ethyl acrylate copolymer, and propylene alone. Polymers, polypropylenes such as propylene-ethylene block copolymers and random copolymers, propylene-ethylene-diene compound copolymers, and the like, polybutene-1, poly-4-methylpentene-1 and the like can be mentioned. Among them, crystalline polyethylene and crystalline polypropylene are preferable, and particularly, melt index (MI) (230 ° C., 2.16
Crystalline polypropylene with a kgf) of 0.05 to 10 g / 10 min is preferred.

The crystalline polypropylene includes, for example, an isotactic propylene homopolymer having crystallinity, an ethylene-propylene random copolymer having a low ethylene unit content, a homo part composed of a propylene homopolymer and an ethylene unit. Relatively high content of ethylene-
A propylene block copolymer composed of a propylene random copolymer and a copolymer part composed of a propylene random copolymer, wherein the homo part or the copolymer part in the propylene block copolymer is further obtained by copolymerizing an α-olefin such as butene-1. Crystalline propylene-ethylene-α-olefin copolymer.

The polyolefin resin of the component (A) may be used alone or in combination of two or more. The thermoplastic elastomer of the component (B) in the resin composition is not particularly limited, and a conventionally known thermoplastic elastomer can be used. Such rubbers include, for example, polysulfide rubber, thiocol rubber, acrylic rubber, urethane rubber, epichlorohydrin rubber, chlorinated rubber, styrene-butyl acrylate rubber, ethylene-methyl methacrylate-glycidyl methacrylate copolymer rubber, ethylene-methyl Ethylene-polar vinyl monomer copolymer rubber such as methacrylate-maleic anhydride copolymer rubber, natural rubber, polybutadiene, polyisoprene, polyisobutylene, neoprene, silicone rubber, styrene-butadiene block copolymer rubber (SBR), styrene -Butadiene-styrene block copolymer (SBS), hydrogenated styrene-butadiene-
Styrene block copolymer (SEBS), styrene-isoprene block copolymer (SIR), styrene-isoprene-styrene block copolymer (SIS), hydrogenated styrene-isoprene-styrene block copolymer (SEPS), ethylene propylene Rubber (EPM), ethylene propylene diene rubber (EPDM), ethylene butylene rubber (EBM), and the like, or a modified rubber thereof may be used. Among them, EPM, EPDM,
EBM and SEBS are preferred. The thermoplastic elastomer of the component (B) may be used alone or in combination of two or more.

The acid-soluble inorganic powder of the component (C) in the resin composition is not particularly limited, and an acid-soluble inorganic powder may be appropriately selected from those conventionally used as inorganic fillers for plastics. Can be used. Such as, for example, calcium carbonate,
Powders such as magnesium carbonate, magnesium hydroxide, and basic magnesium oxysulfate are included. The shape of the acid-soluble inorganic powder is not particularly limited, but preferably has an average particle diameter of about 0.1 to 10 μm.

The acid-soluble inorganic powder of component (C) may be used alone or in combination of two or more.
The content ratios of the components (A), (B), (C) and (D) are as follows: component (A) is 20 to 95 parts by weight,
Component (B) ranges from 0 to 40 parts by weight, component (C) ranges from 5 to 40 parts by weight, and component (D) ranges from 0.01 to 5 parts by weight.
If the content of the component (A) is less than 20 parts by weight, the moldability is insufficient, and if it exceeds 95 parts by weight, the plating property is reduced.
When the content of the component (B) exceeds 40 parts by weight, the rigidity, heat resistance and moldability of the product are reduced. When the content of the component (C) is less than 5 parts by weight, the plating property is poor, and when it exceeds 40 parts by weight, the strength of the product is reduced. Further, when the content of the component (D) is less than 0.01 part by weight, the plating property is poor, and when it exceeds 5 parts by weight, heat resistance and rigidity are reduced. From the viewpoint of the balance between moldability, plating properties and product rigidity, heat resistance, strength, etc., the preferable content ratio of each component is as follows.
90 parts by weight, 2 to 30 parts by weight of the component (B), 8 to 30 parts by weight of the component (C), and 0.02 to 3 parts by weight of the component (D).

In the resin composition of the present invention, a resin composition containing a cationic surfactant as the component (D) for the purpose of simplifying the operation and omitting the step of imparting polarity during plating. Used. There is no particular limitation on the chaoline surfactant, and conventionally known ones such as amine salts and quaternary ammonium salts can be used.

Examples of the amine salt include aliphatic amine salts which can be obtained by neutralizing primary, secondary and tertiary higher alkylamines with an acid.
Examples of the quaternary ammonium salts include aromatic quaternary ammonium salts, aliphatic quaternary ammonium salts, and heterocyclic quaternary ammonium salts. Examples of the aromatic quaternary ammonium salt include a benzalkonium salt and a benzethonium sulfide salt. Examples of the aliphatic quaternary ammonium salt include an alkyltrimethylammonium salt, a dialkyldimethylammonium salt, and an alkyldimethylamine. Benzyl ammonium salts and the like can be mentioned. Examples of the heterocyclic quaternary ammonium salt include an alkylpyridinium salt, an imidazolinium salt, an alkylisoquinolinium salt, and a dialkylmorpholinium salt. Furthermore, in addition to these, examples of the quaternary ammonium salt include quaternary ammonium chloride, quaternary ammonium sulfate, and quaternary ammonium nitrate. Among these, an aliphatic quaternary ammonium salt is preferred from the viewpoint of excellent plating adhesion improving effect. The cationic surfactant of the component (D) may be used alone, or two or more kinds may be used in combination.

This resin composition may further contain (E) a copper damage inhibitor and / or (F) an antioxidant, if desired. The copper damage inhibitor is not particularly limited, and conventionally known ones, for example, oxalic acid derivatives, salicylic acid derivatives, hydrazine derivatives and the like are used. Specifically, 3- (N-salicyloyl) amino-1,2,4-triazole, decamethylenecarboxylic acid disalicyloyl hydrazide, N, N-bis [3- (3,5-di-t-butyl) -4-hydroxyphenyl) propionyl] hydrazine, bis (2-isophthalate)
Phenoxypropionyl hydrazide), N-formyl-N'-
Salicilloylhydrazine, 2,2-oxamidobis- [ethyl-3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate], oxalyl-bis-benzylidene-hydrazide and the like.

The copper harm inhibitor of component (E) may be used alone or in combination of two or more. Also,
The content is usually in the range of 0.01 to 2.0 parts by weight.
If the content is less than 0.01 part by weight, the effect of preventing copper damage may not be sufficiently exhibited. If the content is more than 2.0 parts by weight, the effect is not improved for the amount, and it is rather uneconomical. In addition, other physical properties may be reduced. From the viewpoints of copper damage prevention effect, economic efficiency, and other physical properties, the preferred content of the component (E) is in the range of 0.1 to 1.8 parts by weight.

On the other hand, as the antioxidant of the component (F),
There is no particular limitation, and those conventionally known, for example, phenol-based, phosphorus-based, and sulfur-based ones are used. here,
Examples of phenolic antioxidants include 2,6-di-
t-butyl-4-methylphenol, n-octadecyl-3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate, pentaerythrityl-tetrakis [3- (3,5-di-t- Butyl-4-hydroxyphenyl) propionate], 2-t-butyl-6- (3
-T-butyl-2-hydroxy-5-methylbenzyl)
-4-methylphenyl acrylate, 2- [1- (2-
Hydroxy-3,5-di-t-pentylphenyl) ethyl] -4,6-di-t-pentylphenyl acrylate, triethylene glycol-bis- [3- (3-t-
Butyl-5-methyl-4-hydroxyphenyl) propionate], 1,6-hexanediol-bis- [3-
(3,5-di-t-butyl-4-hydroxyphenyl)
Propionate], 3,9-bis [1,1-dimethyl-2- [β- (3-t-butyl-4-hydroxy-5-
Methylphenyl) propionyloxy] ethyl] -2,
4,8,10-tetraoxaspiro [5,5] undecane, 1,3,5-trimethyl-2,4,6-tris (3,5-di-t-butyl-4-hydroxybenzyl)
Benzene, tris (3,5-di-t-butyl-4-hydroxybenzyl) isocyanurate, tris (4-t-
Butyl-2,6-di-methyl-3-hydroxybenzyl) isocyanurate.

Examples of the phosphorus-based antioxidant include tris (nonylphenyl) phosphite, tris (2,4-di-t-butylphenyl) phosphite,
Bis (2,4-di-t-butylphenyl) pentaerythritol-diphosphite, bis (2,6-di-t
-Butyl-4-methylphenyl) pentaerythritol-diphosphite, bis (2,4,6-tri-t-
Butylphenyl) pentaerythritol-di-phosphite, methylenebis (2,4-di-t-butylphenyl) octylphosphite, tetrakis (2,4-di-t-butylphenyl) -4,4'-biphenylene-di -Phosphonite, tetrakis (2,4-di-t-butyl-5-methylphenyl) -4,4'-biphenylene-di-phosphonite and the like.

Further, examples of the sulfur-based antioxidants include dilauryl thiodipropionate, dimyristyl thiodipropionate, distearyl thiodipropionate, glycerin tributyl thiopropionate, and glycerin trioctyl thiopropionate. Glycerin trilauryl thiopropionate, glycerin tristearyl thiopropionate, trimethylol ethane tributyl thiopropionate, trimethylol ethane trioctyl thiopropionate, trimethylol ethane trilauryl thiopropionate, trimethylol ethane Stearyl thiopropionate, pentaerythritol tetrabutyl thiopropionate, pentaerythritol tetraoctyl thiopropionate, pentaerythritol tetralau Lucio propionate, pentaerythritol tetra distearyl propionate.

The antioxidant of component (F) may be used alone or in combination of two or more. Also,
The content is usually in the range of 0.01 to 2.0 parts by weight.
If the content is less than 0.01 part by weight, the antioxidant effect may not be sufficiently exerted. If the content exceeds 2.0% by weight, the effect is not improved for the amount, and it is uneconomical. In addition, other physical properties may be reduced. From the viewpoints of antioxidant effect, economy and other physical properties, the preferred content of the component (F) is in the range of 0.1 to 1.5 parts by weight.

The resin composition of the present invention may contain a halogen-based flame retardant and a flame-retardant auxiliary, if necessary, in order to impart flame retardancy to the resulting resin (flexible) tube. can do. Here, the halogen-based flame retardant is not particularly limited, and a conventionally known chlorine-based or bromine-based flame retardant can be used. Examples of such halogen-based flame retardants include chlorine-based flame retardants such as perchlorocyclopentadecane, chlorinated paraffin, tetrachlorophthalic anhydride, and chlorendic acid, and tetrabromobisphenol A (T
BA), decabromodiphenyl oxide, hexabromocyclododecane, octabromodiphenyl oxide, bistribromophenoxyethane, tribromophenol, ethylenebistetrabromophthalimide, TB
A polycarbonate oligomer, brominated polystyrene,
Brominated flame retardants such as TBA epoxy oligomer / polymer, ethylenebispentabromodiphenyl, hexabromobenzene, polydibromophenylene oxide, tetrabromodiphenyl oxide and the like. One of these halogen-based flame retardants may be used, or two or more of them may be used in combination.

On the other hand, the flame-retardant auxiliary is not particularly limited, and may be a conventionally known one, for example, an antimony type such as antimony trioxide and antimony pentoxide, and a zirconium type. One of these flame retardant aids may be used, or two or more thereof may be used in combination. The halogen-based flame retardant and the flame retardant auxiliary are generally used in a weight ratio of 5: 1 to 2: 1. The content of the combination of the halogen-based flame retardant and the flame-retardant aid is based on 100 parts by weight of the basic composition comprising the components (A), (B), (C) and (D). Usually, it is in the range of 10 to 150 parts by weight. If the content is less than 10 parts by weight, the effect of imparting flame retardancy may not be sufficiently exhibited, and if it exceeds 150 parts by weight, other physical properties may be reduced. From the standpoint of balance between flame retardancy and other physical properties, the preferred content of the combination of the halogen-based flame retardant and the flame retardant auxiliary is the above-mentioned basic composition 100
It is in the range of 50 to 100 parts by weight based on parts by weight.

As described above, the flame retardancy of the resin composition containing the combination of the halogen-based flame retardant and the flame retardant aid preferably has an oxygen index (OI) in the range of 23 to 32. In the resin composition of the present invention, various known additives such as a light stabilizer, an ultraviolet absorber, a heat stabilizer, a lubricant,
Various fillers, reinforcing materials, additives such as pigments may be contained, and other thermoplastic resins, for example, polyvinyl chloride resin, polyamide resin, polyimide resin, polyester resin, polycarbonate resin, polyacetal resin Resins, polyaromatic ether ketone resins, polyphenylene ether resins, polyphenylene sulfide resins, styrene resins, polyaromatic ester resins, polysulfone resins, acrylate resins, and the like may be contained. The method for preparing the resin composition is not particularly limited, and a conventionally known method, for example, mixing essential components and various optional components used as desired by a mixer such as a V-type blender, a ribbon blender, and a Henschel mixer. A method of kneading with a kneader such as an extruder, a mixing roll, a Banbury mixer, a kneader, or a method of mixing and kneading by combining a kneader and a kneader can be used.

The resin (flexible) tube of the present invention is formed into a tube-like or pipe-like tubular molded body by a known molding method, such as an extrusion molding method, using the resin composition thus obtained. After that, it is obtained by plating. There is no particular limitation on the plating method, and a method conventionally used for plating a plastic can be used. For example, plating is usually performed by sequentially performing (1) an etching step, (2) a catalyst supporting step, (3) an electroless copper plating step, and (4) an electroless nickel plating step. The present invention does not require a polarity imparting step. The etching step (1) is a step of forming an anchor hole on the surface of the molded body, and the etching method is not particularly limited.
A method commonly used in plating a plastic molded body can be used. As an etching agent,
For example, dichromic acid, bichromic acid / sulfuric acid mixture, chromic acid,
A mixed solution of chromic acid / sulfuric acid, trichloroethane, trichloroethylene, xylene and the like are used. After the etching treatment, the etching agent remaining on the surface of the molded body is removed by neutralization, washing, or the like.

Next, the catalyst supporting step (2) is a step for advancing the next step of electroless copper plating, and the method of supporting the catalyst is not particularly limited. A method commonly used in processing can be used. For example, using a colloid of stannous chloride and palladium chloride having negative charges as catalyst particles,
First, colloidal substances of tin and palladium are deposited on the surface of the molded body to which polarity has been imparted by catalyst listing,
Then, by accelerating, by removing tin and leaving only palladium, a method of supporting a catalyst (metal catalyst) for electroless copper plating, or sensitizing (sensitizing treatment), for example, to a stannous chloride solution After immersing the molded body with the polarity, and performing a treatment to adsorb ionic tin having a reducing power on the surface of the molded body,
A method of supporting an electroless copper plating catalyst (metal catalyst) by activation, for example, by immersing the molded body in a palladium chloride solution and depositing palladium by the above-described action of slipping can be used.

Further, the electroless copper plating step (3)
In this step, copper ions are reduced and precipitated on the surface of the molded body after the catalyst supporting step (2) to form a copper film. The electroless copper plating method is not particularly limited, and a method conventionally used in plating a plastic molded body can be used. For example, 10
By immersing the compact obtained in the above step (2) in an aqueous solution of a copper salt containing a reducing agent at about 50 ° C. for about 2 to 20 minutes, a copper plating film can be formed on the surface. The last (4) electroless nickel plating process
This is a step of activating the copper plating film formed in the electroless copper plating step of the above (3) by an ordinary method, and then forming a nickel plating film thereon similarly to the case of (3). In this way, a nickel film having an antirust effect is formed. The resin (flexible) tube plated in this way has good adhesion of the plating film, retains the original characteristics of the polyolefin resin (flexible) tube, and has excellent EMI shielding properties. . The type of the resin (flexible) tube of the present invention is not particularly limited, and a tube having rigidity, a tube having flexibility, for example, a spiral tube or pipe, various shaped tubes or pipes, a corrugated tube or pipe, a flexible spiral. Tubes and the like.

[0026]

Next, the present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples. Example 1 Polypropylene [manufactured by Idemitsu Petrochemical Co., Ltd., trade name: Idemitsu Polypro E-250G, MI 0.9 g / 10 min (230
° C, 2.16 kgf)] 60 parts by weight, Mooney viscosity [ML
_{1 + 4} 100 ° C.] 15 parts by weight of 70 ethylene-propylene copolymer rubber, calcium carbonate powder 2 having an average particle size of 0.8 μm
5 parts by weight, cationic surfactant [manufactured by NOF CORPORATION,
Trade name: Elegan 264] 1 part by weight, copper damage inhibitor [white powder having a melting point of 65 ° C. or more, manufactured by Asahi Denka Kogyo KK, trade name:
ADK STAB ZS-27] 0.2 parts by weight and antioxidant [Sumitomo Chemical Industry Co., Ltd., trade name: Sumilizer TPD]
"Sulfur-based"] After dry blending 0.1 part by weight,
The mixture was melt-kneaded with a twin-screw kneader to obtain pellets. Next, the pellet was formed by an extruder to produce a spiral tube having a thickness of 0.4 mm and a diameter of 60 mm. Next, after attaching this spiral tube to a rack, an etching treatment was performed with a mixed solution of dichromic acid and monosulfuric acid (etching agent). After that, neutralization was performed to remove the etching agent remaining on the surface. Colloidal particles of stannous chloride / palladium chloride were adsorbed as a catalyst on the tube surface thus etched, and then palladium metal was precipitated as an accelerator.

Next, by performing an electroless copper plating treatment to uniformly deposit copper on the surface of the spiral tube, and further activating the copper surface as an activator,
A nickel film having an antirust effect was formed by electroless nickel plating. The spiral tube plated in this way was subjected to a 100-fold bending test, but no peeling of the plated film was observed. The resin was exposed to an oven at 120 ° C. for 500 hours, but no resin deterioration due to copper was observed. Further, when the shielding effect was measured, it was a satisfactory value of 60 dB or more for 300 MHz electric and magnetic waves.

Comparative Example 1 A plated spiral tube was manufactured in the same manner as in Example 1, except that talc was used instead of the calcium carbonate powder. When the bending test was performed 100 times on this spiral tube, the peeling of the plating film was remarkable, and the plating film was in a state where it did not adhere.

Example 2 70 parts by weight of the same polypropylene as in Example 1 and ethylene-
10 parts by weight of a propylene copolymer rubber, 20 parts by weight of a basic magnesium oxysulfate powder having an average particle diameter of 0.4 μm, 0.1 part by weight of a cationic surfactant (trade name: Elegan 264, manufactured by NOF Corporation) Copper damage inhibitor [3-
(N-salicyloyl) amino-1,2,4-triazole, manufactured by Asahi Denka Kogyo Co., Ltd., trade name: ADK STAB CDA
-1] 0.5 parts by weight and an antioxidant [Sumitomo Chemical Co., Ltd.
(Trade name: SUMILIZER GA-80 "Phenol")] was dry-blended, and then melt-kneaded with a twin-screw kneader to obtain pellets. Next, the pellet was formed by an extruder to produce a tube having a thickness of 0.15 mm and a diameter of 20 mm. Next, after attaching this tube to a rack, a mixed solution of dichromic acid and monosulfuric acid (etching agent)
An etching process was performed. After that, neutralization was performed to remove the etching agent remaining on the surface. On the etched tube surface, as a catalyst, stannous chloride / palladium chloride colloid particles are adsorbed,
Next, metal palladium was deposited as an accelerator.

Next, copper is uniformly deposited on the tube surface by performing an electroless copper plating process. Further, the copper surface is activated as an activator, and then rust prevention is performed by an electroless nickel plating process. An effective nickel film was formed. The deformed tube plated in this manner was subjected to a 100-fold bending test, but no peeling of the plated film was observed. The resin was exposed to an oven at 120 ° C. for 500 hours, but no resin deterioration due to copper was observed. Further, when the shielding effect was measured, it was a satisfactory value of 60 dB or more for 300 MHz electric and magnetic waves.

Comparative Example 2 A modified tube was prepared in the same manner as in Example 2 except that no cationic surfactant was added. In this tube, the plating was easily peeled off, and did not reach the point where a bending test was performed.

[0032]

The resin (flexible) tube of the present invention retains the characteristics inherent to the polyolefin resin (flexible) tube, namely, processability and flexibility, and has excellent electromagnetic wave shielding properties. For example, EMI of various electric wires in OA equipment field, automobile field, home electric appliance field, housing equipment field, communication field, etc.
It is suitable for shielding. In particular, it is not necessary to impart a polarity in the plating step, which is very excellent in productivity and cost.

Claims (6)

[Claims] 1. A polyolefin-based resin (A) 20 to 95.
Parts by weight, (B) 0 to 40 parts by weight of a thermoplastic elastomer,
Plating treatment was applied to a tubular molded body composed of a resin composition containing (C) 5 to 40 parts by weight of an acid-soluble inorganic powder and (D) 0.01 to 5.0 parts by weight of a cationic surfactant. A resin tube characterized by the following: 2. The resin tube according to claim 1, wherein the amount of the component (B) is 2 to 30 parts by weight. 3. The resin composition further comprising (E) a copper damage inhibitor.
0.01 to 2.0 parts by weight and / or (F) an antioxidant 0.01
The resin tube according to claim 1, wherein the resin tube contains about 2.0 parts by weight. 4. The resin tube according to claim 1, wherein the plating treatment includes an etching step, a catalyst supporting step, an electroless copper plating step, and an electroless nickel plating step. 5. The resin tube according to claim 1, wherein the resin tube is a flexible tube. 6. The resin tube according to claim 1, which is for electromagnetic wave shielding.