JP2019001357A - Resin metal composite member for tire and tire - Google Patents

Abstract

To provide a resin metal composite member for tire that is a member containing a metal member provided on a tire, which is excellent in adhesive durability and wet heat durability.SOLUTION: A resin metal composite member for tire has a metal member 27, an adhesive layer 25 and a coating resin layer 28 in this order, where the adhesive layer 25 contains at least one polar functional group-containing resin selected from the group consisting of a thermoplastic resin having a polar functional group and a thermoplastic elastomer having a polar functional group, and the metal member 27 has a surface formed of any plating of copper plating, zinc plating and copper-zinc plating and has a copper content in the plating of 0% or 55% or more and 100% or less.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a resin-metal composite member for a tire and a tire.

Conventionally, as one of the attempts to increase the durability (stress resistance, internal pressure resistance and rigidity) of a tire, reinforcement by spirally winding a reinforcing cord as a metal member around a tire body (hereinafter also referred to as a tire frame body) A belt member is provided.
In general, the tire is provided with a bead that plays a role of fixing to the rim, and a metal wire is used as the bead wire.

  In addition, a method for improving the adhesion durability between the metal member provided on the tire and the tire skeleton by coating a metal member such as a reinforcement cord or a bead wire with a resin material has been proposed.

  For example, a tire that is formed of at least a thermoplastic resin material and has an annular tire frame, and has a reinforcing cord member that is wound in the circumferential direction on the outer periphery of the tire frame to form a reinforcing cord layer A tire in which the thermoplastic resin material includes at least a polyester-based thermoplastic elastomer has been proposed (for example, see Patent Document 1).

  One or more reinforcing threads; at least one thermoplastic polymer having a positive glass transition temperature, poly (p- Phenylene ether) and a functionalized unsaturated thermoplastic styrene (TPS) elastomer having a negative glass transition temperature, wherein the TPS elastomer has a functional group selected from an epoxide group, a carboxyl group and an acid anhydride group or an ester group. A composite reinforcing material including a layer of a thermoplastic polymer composition is proposed (see, for example, Patent Document 2).

JP 2012-046025 A International Publication No. 2012/104281

  As described above, a technique for improving the adhesion to the tire skeleton by coating a metal member such as a reinforcement cord or a bead wire with a resin material is known, but from the viewpoint of improving the durability of the tire. There is a need for further improvement in adhesion durability.

  This invention makes it a subject to provide the resin-metal composite member for tires which was the member containing the metal member provided in a tire in view of the said situation, and was excellent in adhesion durability and wet heat durability.

The above problems are solved by the present invention described below.
<1> A resin-metal composite member for a tire having a metal member, an adhesive layer, and a coating resin layer in this order, wherein the adhesive layer includes a thermoplastic resin having a polar functional group and a thermoplastic elastomer having a polar functional group. Including at least one polar functional group-containing resin selected from the group consisting of: the metal member having a surface formed by any one of copper plating, zinc plating, and copper-zinc plating; The resin-metal composite member for tires whose copper content in is 0% or 55% to 100%.
<2> The resin-metal composite member for tire according to claim 1, wherein the copper content in the plating is 80% or more and 100% or less.
<3> The resin-metal composite member for a tire according to <1> or <2>, wherein the metal member is a single wire or a stranded wire.
<4> The polar functional group-containing resin has at least one group selected from the group consisting of an epoxy group, a carboxy group and its anhydride, and an amino group as the polar functional group. The resin-metal composite member for tire according to any one of the above.
<5> The adhesive layer includes, as the polar functional group-containing resin, an ester resin, an olefin resin, a styrene resin, a polyester thermoplastic elastomer, a polyolefin thermoplastic elastomer, and a polystyrene thermoplastic elastomer. The resin-metal composite member for tire according to any one of <1> to <4>, containing at least one selected.
<6> The resin-metal composite member for a tire according to any one of <1> to <5>, including the polar functional group-containing resin in an amount of 50% by mass or more based on the entire adhesive layer.
<7> A tire having an annular tire skeleton including an elastic material and the resin-metal composite member for tire according to any one of <1> to <6>.
<8> The tire according to <7>, wherein the tire resin-metal composite member constitutes a reinforcing belt member wound in a circumferential direction on an outer peripheral portion of the tire skeleton.
<9> The tire according to <7>, wherein the resin-metal composite member for a tire constitutes a bead member.

  ADVANTAGE OF THE INVENTION According to this invention, it is a member containing the metal member provided in a tire, Comprising: The resin metal composite member for tires excellent in adhesion durability can be provided.

1 is a perspective view showing a partial cross section of a tire according to an embodiment of the present invention. It is sectional drawing of the bead part with which the rim | limb was mounted | worn. It is sectional drawing along the tire rotating shaft which shows the state by which the reinforcement cord member was embed | buried under the crown part of the tire frame of the tire of 1st embodiment. It is explanatory drawing for demonstrating the operation | movement which installs a reinforcement cord member in the crown part of a tire frame using a reinforcement cord member heating device and rollers.

  Hereinafter, specific embodiments of the present invention will be described in detail. However, the present invention is not limited to the following embodiments, and may be implemented with appropriate modifications within the scope of the object of the present invention. be able to.

In this specification, “resin” is a concept including a thermoplastic resin, a thermoplastic elastomer, and a thermosetting resin, and does not include vulcanized rubber. In the following description of the resin, “same species” means those having a skeleton that is common to the skeleton constituting the main chain of the resin, such as esters and styrenes.
In the present specification, a numerical range represented by using “to” means a range including numerical values described before and after “to” as a lower limit value and an upper limit value.
In this specification, the term “process” includes not only an independent process but also a process that can be clearly distinguished from other processes as long as the purpose is achieved. include.

In the present specification, the term “thermoplastic resin” means a polymer compound that softens and flows as the temperature rises and becomes relatively hard and strong when cooled, but does not have rubbery elasticity.
In the present specification, the “thermoplastic elastomer” means a copolymer having a hard segment and a soft segment. Specific examples of the thermoplastic elastomer include, for example, a polymer constituting a hard segment having a crystalline high melting point or a hard segment having a high cohesion force, and a polymer constituting a soft segment having an amorphous low glass transition temperature. The copolymer which has is mentioned. Examples of the thermoplastic elastomer include those that soften and flow as the temperature rises, become relatively hard and strong when cooled, and have rubbery elasticity.
The hard segment has, for example, a structure having a rigid group such as an aromatic group or an alicyclic group in the main skeleton, or a structure enabling intermolecular packing by intermolecular hydrogen bonding or π-π interaction, Can be mentioned. The soft segment includes, for example, a segment having a long chain group (for example, a long chain alkylene group) in the main chain, a high degree of molecular rotation freedom, and a stretchable structure.

<Resin metal composite material for tire>
The resin-metal composite member for tires of the present invention (hereinafter also simply referred to as “resin-metal composite member”) includes a metal member, an adhesive layer, and a covering resin layer in this order. The adhesive layer includes at least one polar functional group-containing resin selected from the group consisting of a thermoplastic resin having a polar functional group and a thermoplastic elastomer having a polar functional group, and the metal member includes copper plating, zinc plating And the surface is formed by any one of copper-zinc plating, and the copper content in the plating is 0% or 55% to 100%.

  As described above, metal members are used as reinforcing cords for reinforcing belt members wound around the outer periphery of the tire frame body, bead wires in beads that play a role of fixing to the tire rim, and the like. The normal tire frame is made of an elastic material such as rubber or resin. However, the metal member provided in the tire as described above has an elastic property such as a tire frame from the viewpoint of improving the durability of the tire. There is a strong demand for improved adhesion to materials. Therefore, adhesion is improved by providing an adhesive layer and a covering resin layer in this order on the surface of the metal member and interposing them between the elastic material.

Here, conventionally, a metal member having copper-zinc plating formed on the surface thereof from the viewpoint of corrosion resistance or the like has been used as the metal member. A rubber adhesive is used as an adhesive in the adhesive layer. However, when a rubber-based adhesive is applied to the surface of a metal member whose surface is made of copper-zinc plating, the copper content greatly contributes to the development of the adhesiveness. Therefore, only copper-zinc plating with a copper content in an extremely narrow range can be selected, that is, the degree of freedom in plating selection is narrow.
In addition, even when copper-zinc plating with appropriately adjusted copper content is selected, the adhesiveness is still not sufficient, and further improvement in the adhesiveness (adhesion durability) between this metal member and the adhesive layer is required. Yes.

Therefore, the present inventors made a resin-metal composite member in which an adhesive layer and a coating resin layer are provided in this order on the surface of the metal member, the adhesive layer contains a polar functional group-containing resin, and the metal member is copper-plated The surface is formed by any one of zinc plating and copper-zinc plating, and the copper content in the plating is 0% or 55% or more and 100% or less. It was found that sex can be obtained.
The reason is guessed as follows.

First, the “polar functional group” refers to a group that exhibits chemical reactivity (functionality) and causes a charge bias (polarity) in the molecule.
In the present invention, the adhesive layer contains a polar functional group-containing resin. Therefore, due to the bias of charge due to the polar functional group, an interaction occurs between the copper plating, galvanization, and the hydrated hydroxyl group on the surface of the copper-zinc plating, resulting in an attractive force between them, It is considered that high adhesion between the plating and the adhesive layer can be obtained by forming. That is, the adhesiveness is expressed regardless of the copper content in the plating as in the case of the rubber adhesive. And, in addition to the adhesiveness due to the tackiness of the polar functional group-containing resin, the adhesiveness due to the interaction with the hydrated hydroxyl group is expressed, so it is considered that excellent adhesion durability can be obtained. It is done.

  And by providing the covering resin layer via the adhesive layer, the difference in rigidity between the metal member and the elastic material such as the tire frame can be alleviated, so the resin metal provided with the metal member provided on the tire It is presumed that the composite member can realize excellent adhesion durability.

  Moreover, since adhesiveness is obtained irrespective of the copper content in plating as described above, the degree of freedom in plating selection is also increased.

  Hereinafter, each constituent member of the resin-metal composite member will be described in detail.

  The resin-metal composite member has a structure in which a metal member, an adhesive layer, and a coating resin layer are arranged in this order, and the shape is not particularly limited. Examples of the shape of the resin-metal composite member include a cord shape and a sheet shape.

Applications of the resin-metal composite member include a reinforcing belt member disposed at the crown portion (outer peripheral portion) of the tire frame included in the tire, a bead member that plays a role of fixing to the tire rim, and the like.
For example, as an aspect in which the resin-metal composite member is used as the reinforcing belt member, one or a plurality of cord-like resin-metal composite members are formed on the outer peripheral portion of the tire frame body along the circumferential direction of the tire. The belt layer, a plurality of cord-shaped resin-metal composite members having an angle with respect to the circumferential direction of the tire, and can be used as a cross belt layer arranged so as to cross each other.

  In the resin-metal composite member, the structure “having the metal member, the adhesive layer, and the coating resin layer in this order” includes, for example, a state in which the entire surface of the metal member is covered with the coating resin layer via the adhesive layer, And a state in which a part of the surface of the member is coated with a coating resin layer via an adhesive layer. At least in the region where the resin-metal composite member and the elastic member such as the tire frame body are in contact with each other, the metal member, the adhesive layer having a relatively larger tensile elastic modulus than the covering resin layer, and the covering resin layer are in this order. It is preferable to have an arranged structure. In addition to the metal member, the adhesive layer, and the coating resin layer, the resin-metal composite member may have other layers. However, from the viewpoint of adhesion between the metal member and the coating resin layer, the resin-metal composite member is bonded to the metal member. The layer is in direct contact with at least a portion, and the adhesive layer and the coating resin layer are in direct contact with at least a portion.

[Metal members]
The metal member is not particularly limited, and for example, a metal cord used for a conventional rubber tire can be used as appropriate. Examples of the metal cord include a monofilament (single wire) made of one metal cord, a multifilament (twisted wire) obtained by twisting a plurality of metal cords, and the like. The shape of the metal member is not limited to a linear shape (code shape), and may be a plate-like metal member, for example.
The metal member in the present invention is preferably monofilament (single wire) or multifilament (twisted wire), and more preferably multifilament from the viewpoint of further improving the durability of the tire. The cross-sectional shape, size (diameter), etc. of the metal member are not particularly limited, and those suitable for the desired tire can be appropriately selected and used.
When the metal member is a stranded wire of a plurality of cords, the number of the plurality of cords is, for example, 2 to 10 and preferably 5 to 9.

  The thickness of the metal member is preferably 0.2 mm to 2 mm, more preferably 0.8 mm to 1.6 mm, from the viewpoint of achieving both the internal pressure resistance and weight reduction of the tire. Let the thickness of a metal member be the number average value of the thickness measured in five places chosen arbitrarily.

  The tensile elastic modulus of the metal member itself (hereinafter, unless otherwise specified, “elastic modulus” means a tensile elastic modulus in the present specification) is usually about 100,000 MPa to 300,000 MPa, and 120,000 MPa to 270000 MPa. Preferably, it is 150,000 MPa-250,000 MPa. The tensile modulus of the metal member is calculated from the slope of a stress-strain curve drawn on a tensile tester using a ZWICK type chuck.

  The breaking elongation (tensile breaking elongation) of the metal member itself is usually about 0.1% to 15%, preferably 1% to 15%, and more preferably 1% to 10%. The tensile elongation at break of the metal member can be obtained from the strain by drawing a stress-strain curve using a ZWICK chuck with a tensile tester.

-Plating A metal member is formed with any one of copper plating, zinc plating, and copper-zinc plating on the surface thereof.
The copper content in the plating is 0% or 55% to 100%. A copper content of 0% indicates galvanization, while a copper content of 100% indicates copper plating. That is, in other words, the present invention includes copper plating, zinc plating, or copper-zinc plating having a copper content of 55% or more.
In the case of copper-zinc plating, if the copper content is less than 55%, the brittleness of the plating itself becomes high and the durability is poor.

  Preferably copper plating (plating with a copper content of 100%) or copper-zinc plating with a copper content of 57% or more, more preferably copper plating (plating with a copper content of 100%) or copper content of 62% or more. Copper-zinc plating, more preferably copper plating (plating with a copper content of 100%) or copper-zinc plating with a copper content of 80% or more.

  The copper content in the plating is quantified by energy dispersive X-ray spectroscopy (EDX). Contained from the peak value of copper (Cu) or zinc (Zn), etc. in the obtained EDX scattered X-ray spectrum by analyzing under the conditions of acceleration voltage 15 kV and magnification 1000 times using TM3030Plus analyzer manufactured by Hitachi High-Technologies The rate can be calculated.

For example, the plating thickness is preferably in the range of 0.1 μm or more and 10 μm or less, and more preferably in the range of 0.2 μm or more and 8.0 μm or less.
The plating thickness can be measured by observation with a scanning electron microscope (SEM).

The method for forming the plating on the surface of the metal member is not particularly limited, and can be performed by a known method. For example, the metal member that becomes the core wire of the plating element wire is immersed in, for example, a copper plating bath and a galvanizing bath, respectively, and plating is performed. In the case of copper plating, it is treated with a copper cyanide bath, a copper borofluoride bath, a copper sulfate bath or the like, and in the case of zinc plating, it is treated with a zinc cyanide bath, a zinc chloride bath, a zincate bath or the like.
Next, the metal member immersed through the plating bath is subjected to a thermal diffusion treatment, whereby copper and zinc are uniformly diffused over the entire plating layer. In the thermal diffusion treatment, for example, heat treatment is performed under conditions of 500 ° C. to 650 ° C. and within about 1 minute (for example, 5 seconds to 25 seconds), and copper-zinc plating is performed.
Next, the metal member subjected to the thermal diffusion treatment is drawn to form a metal member having a predetermined plating thickness and a predetermined wire diameter.
In addition, the formation method of plating is not limited to the order of the above processes.

[Adhesive layer]
(Polar functional group-containing resin)
The adhesive layer is disposed between the metal member and the coating resin layer, and at least one polar functional group-containing resin selected from the group consisting of a thermoplastic resin having a polar functional group and a thermoplastic elastomer having a polar functional group; ,including.

Examples of the thermoplastic resin having a polar functional group include polyester-based thermoplastic resins, olefin-based thermoplastic resins, and polystyrene-based thermoplastic resins having a polar functional group.
Examples of the thermoplastic elastomer having a polar functional group include polyester-based thermoplastic elastomers having polar functional groups, olefin-based thermoplastic elastomers, polystyrene-based thermoplastic elastomers, and the like.
You may use these individually or in combination of 2 or more types.

The polar functional group possessed by the polar functional group-containing resin is an epoxy group (the group shown in (1) below, wherein R ¹¹ , R ¹² and R ¹³ each independently represents a hydrogen atom or an organic group (eg, an alkyl group)). Carboxy group (—COOH) and its anhydride group, amino group (—NH ₂ ), isocyanate group (—NCO), hydroxy group (—OH), imino group (═NH), silanol group (—SiOH), etc. Can be mentioned.
The “anhydride group” means an anhydride group in which H ₂ O is removed from two carboxy groups (an anhydride group shown in (2-1) below, where R ²¹ is a single bond or a substituted group). Represents an alkylene group which may have a group, and R ²² and R ²³ each independently represent a hydrogen atom or an organic group (for example, an alkyl group). The anhydride group shown in the following (2-1) becomes a state shown in the following (2-2), that is, a state having two carboxy groups, when H ₂ O is given.
Among these, from the viewpoint of adhesion to a metal member, an epoxy group, a carboxy group and its anhydride group, a hydroxy group, and an amino group are preferable, and an epoxy group, a carboxy group and its anhydride group, and an amino group are more preferable. preferable.

  The polar functional group-containing resin can be obtained by modifying a thermoplastic resin or a thermoplastic elastomer with a compound (derivative) having a group that becomes a polar functional group. For example, a compound having a group that becomes a polar functional group in a thermoplastic resin or a thermoplastic elastomer and a reactive group (for example, an unsaturated group (such as an ethylenic carbon-carbon double bond)) is chemically generated. It can be obtained by bonding to (addition reaction, graft reaction, etc.).

  Examples of derivatives (compounds having a polar functional group) that modify thermoplastic resins or thermoplastic elastomers include, for example, epoxy compounds having reactive groups, unsaturated carboxylic acids (methacrylic acid, maleic acid, fumaric acid, itacon). Acid), unsaturated carboxylic anhydrides (maleic anhydride, citraconic anhydride, itaconic anhydride, glutaconic anhydride, etc.), carboxylic acids having other reactive groups and anhydrides thereof, amine compounds having reactive groups, Examples include an isocyanate compound having a reactive group, an alcohol having a reactive group, a silane compound having a reactive group, or a derivative thereof.

  Examples of the polyester-based thermoplastic resin include aliphatic polyester-based thermoplastic resins and aromatic polyester-based thermoplastic resins. The polyester-based thermoplastic resin before being modified with a compound (derivative) having a group that becomes a polar functional group is the same as the polyester-based thermoplastic resin used in the coating resin layer described later.

  Examples of the olefin-based thermoplastic resin include a polyethylene-based thermoplastic resin, a polypropylene-based thermoplastic resin, and a polybutadiene-based thermoplastic resin. The olefinic thermoplastic resin before being modified with the compound (derivative) having a group that becomes a polar functional group is the same as the olefinic thermoplastic resin used in the coating resin layer described later.

  The polyester-based thermoplastic elastomer, the olefin-based thermoplastic elastomer, and the polystyrene-based thermoplastic elastomer before being modified with a compound (derivative) having a group that becomes a polar functional group include polyester-based heat used for a tire skeleton described later. This is the same as the plastic elastomer, the olefin thermoplastic elastomer, and the polystyrene thermoplastic elastomer.

  The adhesive layer preferably contains 50% by mass or more of the polar functional group-containing resin with respect to the entire adhesive layer, more preferably 60% by mass or more, and further preferably 75% by mass or more.

(Synthesis method)
Here, a method for synthesizing the polar functional group-containing resin will be specifically described.
For example, a styrene elastomer having a polar functional group can be obtained by introducing a polar functional group into an unmodified styrene elastomer. Specifically, in the case of a styrene elastomer having an epoxy group as a polar functional group, it can be obtained by reacting an unmodified styrene elastomer with an epoxidizing agent in the presence of a solvent and a catalyst as necessary. . Examples of the epoxidizing agent include hydroperoxides such as hydrogen peroxide, tertiary butyl hydroperoxide, and cumene hydroperoxide; peracids such as performic acid, peracetic acid, perbenzoic acid, and trifluoroperacetic acid; Etc.

  As an example of the synthesis method, a method for modifying a polyester thermoplastic elastomer (TPC) with an unsaturated carboxylic acid or an anhydride thereof will be described in detail below.

  The polyester-based thermoplastic elastomer having a polar functional group (hereinafter also simply referred to as “polar group-containing TPC”) is obtained by, for example, melting a saturated polyester-based thermoplastic elastomer containing a polyalkylene ether glycol segment with an unsaturated carboxylic acid or Obtained by modification with its derivatives

  Modification means graft modification of a saturated polyester thermoplastic elastomer containing a polyalkylene ether glycol segment with an unsaturated carboxylic acid or a derivative thereof, terminal modification and modification by transesterification, modification by decomposition reaction, and the like. Specifically, as the site to which the unsaturated carboxylic acid or derivative thereof is bonded, a terminal functional group or an alkyl chain moiety is conceivable, particularly for the ether bond of the terminal carboxylic acid, terminal hydroxyl group and polyalkylene ether glycol segment. Examples include α-position and β-position carbon. In particular, it is presumed that the polyalkylene ether glycol segment has many bonds at the α-position with respect to the ether bond.

(1) Compounding material (A) Saturated polyester-based thermoplastic elastomer A saturated polyester-based thermoplastic elastomer is usually a block copolymer composed of a soft segment containing a polyalkylene ether glycol segment and a hard segment containing a polyester. is there.

  Moreover, it is preferable that content of the polyalkylene ether glycol segment in a saturated polyester-type thermoplastic elastomer is 58-73 mass% in this polyester-type elastomer, More preferably, it is 60-70 mass%.

  Examples of the polyalkylene ether glycol constituting the soft segment include polyethylene glycol, poly (1,2 and 1,3-propylene ether) glycol, poly (tetramethylene ether) glycol, poly (hexamethylene ether) glycol, and the like. Can be mentioned. Particularly preferred is poly (tetramethylene ether) glycol. In the present invention, the polyalkylene ether glycol preferably has a number average molecular weight of 400 to 6,000, more preferably 600 to 4,000, and particularly preferably 1,000 to 3,000. . The “number average molecular weight” here is measured by gel permeation chromatography (GPC). For calibration of GPC, a POLYTETRAHYDROFURAN calibration kit manufactured by POLYMERLABORATORIES, UK may be used.

  The saturated polyester-based thermoplastic elastomer includes, for example, i) an aliphatic and / or alicyclic diol having 2 to 12 carbon atoms, and ii) an aromatic dicarboxylic acid and / or an alicyclic dicarboxylic acid or an alkyl ester thereof, And iii) A polyalkylene ether glycol having a number average molecular weight of 400 to 6,000 is used as a raw material, and an oligomer obtained by an esterification reaction or a transesterification reaction can be polycondensed.

  As the aliphatic and / or alicyclic diol having 2 to 12 carbon atoms, those usually used as a raw material for polyester, particularly as a raw material for a polyester-based thermoplastic elastomer, can be used. For example, ethylene glycol, propylene glycol, trimethylene glycol, 1,4-butanediol, 1,4-cyclohexanediol, 1,4-cyclohexanedimethanol and the like are mentioned, among which 1,4-butanediol and ethylene glycol are preferable. In particular, 1,4-butanediol is preferred. These diols can be used singly or as a mixture of two or more.

  As the aromatic dicarboxylic acid and / or alicyclic dicarboxylic acid, those generally used as raw materials for polyesters, particularly polyester-based thermoplastic elastomers, can be used, such as terephthalic acid, isophthalic acid, phthalic acid, Examples include 2,6-naphthalenedicarboxylic acid and cyclohexanedicarboxylic acid. Among these, terephthalic acid and 2,6-naphthalenedicarboxylic acid are preferable, and terephthalic acid is particularly preferable. Two or more of these dicarboxylic acids may be used in combination. When using an aromatic dicarboxylic acid and / or an alkyl ester of an alicyclic dicarboxylic acid, the dimethyl ester or diethyl ester of the above-mentioned dicarboxylic acid is used. Preference is given to dimethyl terephthalate and 2,6-dimethyl naphthalate.

In addition to the above components, trifunctional triols, tricarboxylic acids or esters thereof may be copolymerized in a small amount, and aliphatic dicarboxylic acids such as adipic acid or dialkyl esters thereof can also be used as a copolymerization component.
Examples of commercially available polyester thermoplastic elastomers include “Primalloy” manufactured by Mitsubishi Chemical Corporation, “Perprene” manufactured by Toyobo Co., Ltd., “Hytrel” manufactured by Toray DuPont Co., Ltd., and the like.

(B) Unsaturated carboxylic acid or derivative thereof As unsaturated carboxylic acid or derivative thereof, for example, unsaturated acids such as acrylic acid, maleic acid, fumaric acid, tetrahydrophthalic acid, itaconic acid, citraconic acid, crotonic acid, and isocrotonic acid Carboxylic acid; for example, 2-octen-1-yl succinic anhydride, 2-dodecen-1-yl succinic anhydride, 2-octadecene-1-yl succinic anhydride, maleic anhydride, 2,3- Dimethylmaleic anhydride, bromomaleic anhydride, dichloromaleic anhydride, citraconic anhydride, itaconic anhydride, 1-butene-3,4-dicarboxylic anhydride, 1-cyclopentene-1,2-dicarboxylic acid Acid anhydride, 1,2,3,6-tetrahydrophthalic anhydride, 3,4,5,6-tetrahydrophthalic anhydride, exo-3 , 6-epoxy-1,2,3,6-tetrahydrophthalic anhydride, 5-norbornene-2,3-dicarboxylic anhydride, methyl-5-norbornene-2,3-dicarboxylic anhydride, endo-bicyclo [2.2.2] Oct-5-ene-2,3-dicarboxylic acid anhydride, bicyclo [2.2.2] oct-7-ene-2,3,5,6-tetracarboxylic acid anhydride, etc. Unsaturated carboxylic anhydrides; methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, butyl (meth) acrylate, hexyl (meth) acrylate, octyl (meth) acrylate, (Meth) acrylic acid 2-ethylhexyl, (meth) acrylic acid lauryl, (meth) acrylic acid stearyl, glycidyl methacrylate, maleic acid dimethyl, maleic acid Hexyl Le), and unsaturated carboxylic acid esters such as 2-hydroxyethyl methacrylate. Of these, unsaturated carboxylic acid anhydrides are preferred. These compounds having an unsaturated bond may be appropriately selected according to the copolymer containing the polyalkylene ether glycol segment to be modified and the modification conditions, or two or more of them may be used in combination. The compound having an unsaturated bond can be added after being dissolved in an organic solvent or the like.

(C) Radical generator As the radical generator used for carrying out the radical reaction in the modification treatment, for example, t-butyl hydroperoxide, cumene hydroperoxide, 2,5-dimethylhexane-2,5-dihydro Peroxide, 2,5-dimethyl-2,5-bis (tertiarybutyloxy) hexane, 3,5,5-trimethylhexanoyl peroxide, t-butylperoxybenzoate, benzoyl peroxide, dicumyl peroxide 1,3-bis (t-butylperoxyisopropyl) benzene, dibutyl peroxide, methyl ethyl ketone peroxide, potassium peroxide, hydrogen peroxide and other organic and inorganic peroxides, 2,2′-azobisisobutyro Nitrile, 2,2'-azobis (isobutyramide) diha Id, 2,2'-azobis [2-methyl-N-(2-hydroxyethyl) propionamide], azo compounds such as azodi -t- butane, and carbon radical generators such as dicumyl can be exemplified. These radical generators may be appropriately selected according to the type of the saturated polyester thermoplastic elastomer containing the polyalkylene ether glycol segment used for the modification treatment, the type of the unsaturated carboxylic acid or its derivative, and the modification conditions. Moreover, you may use 2 or more types together. The radical generator can also be added after being dissolved in an organic solvent or the like. In order to further improve the adhesion, not only a radical generator but also a compound having an unsaturated bond (the following (D)) can be used in combination as a modification aid.

(D) Compound having an unsaturated bond The compound having an unsaturated bond refers to a compound having a carbon-carbon multiple bond other than the (B) radical generator, specifically, styrene, methylstyrene, And vinyl aromatic monomers such as ethyl styrene, isopropyl styrene, phenyl styrene, o-methyl styrene, 2,4-dimethyl styrene, o-chloro styrene, o-chloromethyl styrene, and the like. With these blends, improvement in modification efficiency can be expected.

(2) Additional compounding materials (optional components)
Arbitrary components can be mix | blended with the adhesive agent for forming a contact bonding layer other than polar group containing TPC. Specifically, resin component, rubber component, talc, calcium carbonate, mica, glass fiber filler, plasticizer such as paraffin oil, antioxidant, heat stabilizer, light stabilizer, ultraviolet absorber, neutralizer Add various additives such as lubricants, anti-fogging agents, anti-blocking agents, slip agents, cross-linking agents, cross-linking aids, colorants, flame retardants, dispersants, antistatic agents, antibacterial agents, fluorescent whitening agents, etc. be able to. Among them, it is preferable to add at least one of various antioxidants such as phenol, phosphite, thioether, and aromatic amine.

(3) Blending ratio The blending ratio of each component constituting the polar group-containing TPC is preferably (B) an unsaturated carboxylic acid or its derivative with respect to 100 parts by weight of the (A) saturated polyester-based thermoplastic elastomer. 0.01 to 30 parts by mass, more preferably 0.05 to 5 parts by mass, still more preferably 0.1 to 2 parts by mass, particularly preferably 0.1 to 1 part by mass, C) The radical generator is preferably 0.001 to 3 parts by mass, more preferably 0.005 to 0.5 parts by mass, still more preferably 0.01 to 0.2 parts by mass, and particularly preferably 0.01 to The blending ratio is 0.1 parts by mass.

The amount of modification of the polar group-containing TPC by the infrared absorption spectrum method is desirably 0.01 to 15 in terms of the following formula A ₁₇₈₆ / (Ast × r), preferably 0.03 to 2.5. Yes, more preferably from 0.1 to 2.0, and particularly preferably from 0.2 to 1.8.
[However, A ₁₇₈₆ is a peak intensity of 1786 cm ⁻¹ measured on a 20 μm thick film of polar group-containing TPC, and Ast is a standard sample (the content of polyalkylene ether glycol segment is 65% by mass). It is the peak intensity of the standard wave number measured for a film having a thickness of 20 μm of a certain saturated polyester elastomer, and r is the molar fraction of the polyester segment in the polar group-containing TPC and the polyester segment in the standard sample. It is the value divided by the mole fraction. ]

A method for determining the value of the modification amount of the polar group-containing TPC by the infrared absorption spectrum method is as follows. That is, a film sample having a thickness of 20 μm is dried under reduced pressure at 100 ° C. for 15 hours to remove unreacted substances, and an infrared absorption spectrum is measured. From the obtained spectrum, the tangent line connecting the both sides of the foot of the mountain of the absorption band the baseline in the range of the absorption peak (1750~1820cm ^-1 by stretching vibration of the carbonyl group derived from an acid anhydride appears at 1786 cm ^-1 ) Is calculated as “peak intensity A ₁₇₈₆ ”. On the other hand, the infrared absorption spectrum of a standard sample (saturated polyester elastomer having a polyalkylene ether glycol segment content of 65% by mass) with a thickness of 20 μm is measured in the same manner. From the obtained spectrum, the peak of the reference wave number, for example in the case of an aromatic polyester elastomer having a benzene ring, the absorption peak due to out-of-plane deformation of the C-H in benzene ring appearing at 872cm ^-1 (850~900cm ^-1 The peak height of the tangent line connecting the mountain hems on both sides of the absorption band in the range of (the base line is used) is calculated as “peak intensity As”. The peak of the reference wave number may be selected from those derived from hard segments that are not affected by denaturation and do not have an absorption peak overlapping in the vicinity thereof. From these two peak intensities, the amount of modification by the infrared absorption spectrum method is calculated according to the above formula. In that case, as r, the value which remove | divided the molar fraction of the polyester segment in the polar group containing TPC which calculates | requires modification | denaturation amount by the molar fraction of the polyester segment in the said standard sample is used. Moreover, the molar fraction mr of the polyester segment of each sample is the mass fraction (w ₁ and w ₂ ) of the polyester segment and the polyalkylene ether glycol segment, and the molecular weight of the monomer unit constituting both segments (e ₁ and e ₂ ) and is obtained by the following equation.
mr = (w ₁ / e ₁ ) / [(w ₁ / e ₁ ) + (w ₂ / e ₂ )]

(4) Blending method Synthesis of polar group-containing TPC is, for example, modifying (A) a saturated polyester thermoplastic elastomer with (B) an unsaturated carboxylic acid or a derivative thereof in the presence of (C) a radical generator. Done in At this time, it is preferable to use the component (A) as a melt because the reaction with the component (B) becomes more efficient and sufficient modification is realized. For example, a method of preliminarily mixing the component (B) with the non-molten component (A) and then melting the component (A) to react with the component (B) can be preferably used.
Moreover, in order to mix a component (B) with a component (A), it is preferable to select what is called a melt kneading method using the kneader which can give sufficient shearing stress. As a kneading machine used for the melt kneading method, from a conventional kneading machine such as a mixing roll, a sigma type kneading machine with rotary blades, a Banbury mixer, a high-speed biaxial continuous mixer, a uniaxial, biaxial, multi-screw extruder type kneader, etc. You can choose any one. Among these, a twin screw extruder is preferable because of high reaction efficiency and low manufacturing cost. Melt-kneading is a powdery or granular component (A), component (B) and component (C), and, if necessary, component (D), the above-mentioned additional compounding material (optional component), etc. It is also possible to carry out the compounding agent after uniformly mixing with a Henschel mixer, a ribbon blender, a V-type blender or the like at a prescribed blending ratio. The kneading temperature of each component is preferably in the range of 100 ° C. to 300 ° C., more preferably in the range of 120 ° C. to 280 ° C., taking into account the thermal degradation of the component (A) and the half-life temperature of the component (C). Especially preferably, it is the range of 150 to 250 degreeC. In practice, the optimum kneading temperature is a temperature range from a temperature 20 ° C. higher than the melting point of the component (A) to the melting point. Furthermore, the kneading order and method of each component are not particularly limited, and the component (A), the component (B) and the component (C), and additional compounding materials such as the component (D) are collectively included. A method of kneading, or a method of kneading a part of components (A) to (D) and then kneading the remaining components including additional compounding materials may be used. However, when mix | blending a component (C), it is preferable from the point of an adhesive improvement to add this simultaneously with a component (B) and a component (D).

(Physical properties)
-Tensile elastic modulus It is preferable that an adhesive layer is a layer whose tensile elastic modulus is smaller than a coating resin layer. The tensile elastic modulus of the adhesive layer can be controlled by, for example, the type of adhesive used for forming the adhesive layer, the formation conditions of the adhesive layer, the thermal history (for example, heating temperature, heating time, etc.), and the like.
For example, the lower limit of the tensile elastic modulus of the adhesive layer is preferably 1 MPa or more, more preferably 20 MPa or more, and even more preferably 50 MPa or more. When the tensile modulus is equal to or higher than the lower limit, the adhesion performance with the metal member and the tire durability are excellent.
Further, the upper limit value of the tensile elastic modulus of the adhesive layer is preferably 1500 MPa or less, more preferably 600 MPa or less, and further preferably 400 MPa or less from the viewpoint of ride comfort.
The tensile modulus of the adhesive layer can be measured by the same method as the tensile modulus of the coating resin layer.
Further, the tensile modulus of the adhesive layer and _{E 1,} when the tensile modulus of the coating resin layer was _{E 2,} as the value of E 1 / _{E 2,} for example, an 0.05 or more and 0.5 or less, 0.05 or more and 0.3 or less are preferable, and 0.05 or more and 0.2 or less are more preferable. When the value of E ₁ / E ₂ is in the above range, the durability of the tire is excellent as compared with the case where the value is smaller than the above range, and the riding comfort during traveling is excellent as compared with the case where the value is larger than the above range.

-Melting | fusing point As for melting | fusing point of polar functional group containing resin, 160 to 230 degreeC is preferable, 180 to 227 degreeC is more preferable, 190 to 225 degreeC is more preferable.
When the melting point is 160 ° C. or higher, the heat resistance against heating (for example, vulcanization) during tire manufacture is excellent. Moreover, it becomes easy to make it near melting | fusing point with the polyester-type thermoplastic elastomer contained in a coating resin layer because melting | fusing point is the said range, and more excellent adhesiveness is acquired by setting it as near melting | fusing point.
The melting point of the polar functional group-containing resin refers to the temperature at which an endothermic peak is obtained in a curve (DSC curve) obtained by differential scanning calorimetry (DSC). The melting point is measured using a differential scanning calorimeter DSC according to JIS K 7121: 2012. The measurement can be performed, for example, using “DSC Q100” of TA Instruments Co., Ltd. at a sweep rate of 10 ° C./min.

-Thickness The average thickness of the adhesive layer is not particularly limited, but is preferably 5 μm to 500 μm, more preferably 20 μm to 150 μm, and more preferably 20 μm to 100 μm from the viewpoint of riding comfort during running and durability of the tire. More preferably.

  The average thickness of the adhesive layer is obtained by obtaining SEM images of cross sections obtained by cutting the resin-metal composite member along the stacking direction of the metal member, the adhesive layer, and the coating resin layer from arbitrary five locations. The number average value of the thickness of the adhesive layer measured from The thickness of the adhesive layer in each SEM image is measured at the thinnest part (the part where the distance between the interface between the metal member and the adhesive layer and the interface between the adhesive layer and the coating resin layer is minimum). Value.

Further, the average thickness of the adhesive layer and _{T 1,} when the average thickness of the resin coating layer was _{T 2,} as the value of T 1 / _{T 2,} for example, an 0.1 to 0.5, 0. 1 or more and 0.4 or less are preferred, and 0.1 or more and 0.35 or less are more preferred. When the value of T ₁ / T ₂ is in the above range, the ride comfort during running is superior to that in the case where the value is smaller than the above range, and the durability of the tire is excellent in comparison with the case where the value is larger than the above range.

[Coating resin layer]
The material of the coating resin layer is not particularly limited, and for example, at least one thermoplastic material selected from the group consisting of a thermoplastic resin and a thermoplastic elastomer can be used.
The coating resin layer desirably contains a thermoplastic elastomer from the viewpoint of ease of molding and adhesiveness to the adhesive layer.

  Moreover, it is desirable that the coating resin layer contains a polyester-based thermoplastic elastomer, among other thermoplastic elastomers. If the adhesive layer contains a polyester-based thermoplastic elastomer having a polar functional group, the material for the adhesive layer (adhesive) and the coating resin layer are included by including the coating resin layer polyester-based thermoplastic elastomer. Excellent compatibility with materials (resins). Thereby, it is considered that the adhesion at the surface of the adhesive layer is excellent and the high adhesion between the adhesive layer and the coating resin layer can be obtained.

(Polyester thermoplastic elastomer)
The polyester-based thermoplastic elastomer preferably includes a polyester-based thermoplastic elastomer having no polar functional group, and more preferably includes an unmodified polyester-based thermoplastic elastomer.
When the coating resin layer includes a polyester-based thermoplastic elastomer (preferably a polyester-based thermoplastic elastomer having no polar functional group), it is preferably included in an amount of 50% by mass or more with respect to the entire coating resin layer, and 60% by mass or more. Is more preferable, and 70 mass% or more is still more preferable.
The polyester-based thermoplastic elastomer is the same as the polyester-based thermoplastic elastomer used in the tire skeleton described later, and the preferred embodiment is also the same. Therefore, detailed description is omitted here.

When the coating resin layer contains a polyester-based thermoplastic elastomer, the melting point of the polyester-based thermoplastic elastomer is preferably 160 ° C or higher and 230 ° C or lower, more preferably 180 ° C or higher and 227 ° C or lower, and further preferably 190 ° C or higher and 225 ° C or lower. .
When the melting point is 160 ° C. or higher, the heat resistance against heating (for example, vulcanization) during tire manufacture is excellent. In addition, when the melting point is in the above range, it becomes easy to obtain a melting point close to that when the adhesive layer contains a polyester-based thermoplastic elastomer having a polar functional group. It is done.
In addition, the measurement of melting | fusing point of the polyester-type thermoplastic elastomer contained in a coating resin layer is performed by the method similar to the above-mentioned polar functional group containing resin.

(Other thermoplastic elastomers)
Examples of the other thermoplastic elastomers include polyamide-based thermoplastic elastomers, polystyrene-based thermoplastic elastomers, polyurethane-based thermoplastic elastomers, and olefin-based thermoplastic elastomers. You may use these individually or in combination of 2 or more types.
The above-mentioned polyamide-based thermoplastic elastomer, polystyrene-based thermoplastic elastomer, polyurethane-based thermoplastic elastomer, and olefin-based thermoplastic elastomer are the same as the thermoplastic elastomer used for the tire frame described later, and the preferred embodiments are also the same. Therefore, detailed description is omitted here.

(Thermoplastic resin)
Examples of the thermoplastic resin include polyamide-based thermoplastic resins, polyester-based thermoplastic resins, olefin-based thermoplastic resins, polyurethane-based thermoplastic resins, vinyl chloride-based thermoplastic resins, and polystyrene-based thermoplastic resins. it can. You may use these individually or in combination of 2 or more types.

-Polyamide thermoplastic resin-
Examples of the polyamide-based thermoplastic resin include a polyamide that forms a hard segment of a polyamide-based thermoplastic elastomer used in a tire skeleton, which will be described later. Specifically, as the polyamide-based thermoplastic resin, polyamide (amide 6) obtained by ring-opening polycondensation of ε-caprolactam, polyamide (amide 11) obtained by ring-opening polycondensation of undecane lactam, and ring-opening polycondensation of lauryl lactam. Examples thereof include polyamide (amide 12), polyamide (amide 66) obtained by polycondensation of diamine and dibasic acid, and polyamide (amide MX) having metaxylenediamine as a structural unit.

The amide 6 can be represented by, for example, {CO— (CH ₂ ) ₅ —NH} _n . The amide 11 can be represented by, for example, {CO— (CH ₂ ) ₁₀ —NH} _n . The amide 12 can be represented by, for example, {CO— (CH ₂ ) ₁₁ —NH} _n . The amide 66 can be represented by {CO (CH ₂ ) ₄ CONH (CH ₂ ) ₆ NH} _n , for example. Amide MX can be represented by the following structural formula (A-1), for example. Here, n represents the number of repeating units.
As a commercially available product of amide 6, for example, “UBE nylon” series (for example, 1022B, 1011FB, etc.) manufactured by Ube Industries, Ltd. can be used. As a commercially available product of amide 11, for example, “Rilsan B” series manufactured by Arkema Co., Ltd. can be used. As a commercially available product of amide 12, for example, “UBE nylon” series (for example, 3024U, 3020U, 3014U, etc.) manufactured by Ube Industries, Ltd. can be used. As a commercially available product of amide 66, for example, “UBE nylon” series (for example, 2020B, 2015B, etc.) manufactured by Ube Industries, Ltd. can be used. As a commercially available product of amide MX, for example, “MX nylon” series (for example, S6001, S6021, S6011, etc.) manufactured by Mitsubishi Gas Chemical Co., Ltd. can be used.

  The polyamide-based thermoplastic resin may be a homopolymer formed only from the above structural unit, or may be a copolymer of the above structural unit and another monomer. In the case of a copolymer, it is preferable that the content rate of the said structural unit in each polyamide-type thermoplastic resin is 40 mass% or more.

-Polyester thermoplastic resin-
Examples of the polyester-based thermoplastic resin include a polyester that forms a hard segment of a polyester-based thermoplastic elastomer used in a tire skeleton described below.
Specific examples of the polyester-based thermoplastic resin include polylactic acid, polyhydroxy-3-butylbutyric acid, polyhydroxy-3-hexylbutyric acid, poly (ε-caprolactone), polyenantlactone, polycaprylolactone, and polybutylene. Examples include aliphatic polyesters such as adipate and polyethylene adipate, and aromatic polyesters such as polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, and polybutylene naphthalate. Among these, from the viewpoint of heat resistance and processability, polybutylene terephthalate is preferable as the polyester-based thermoplastic resin.

  Examples of commercially available polyester-based thermoplastic resins include “Duranex” series (for example, 2000, 2002, etc.) manufactured by Polyplastics Co., Ltd., and “Novaduran” series (for example, manufactured by Mitsubishi Engineering s Plastics Co., Ltd.) 5010R5, 5010R3-2, etc.), “Toraycon” series (for example, 1401X06, 1401X31, etc.) manufactured by Toray Industries, Inc. can be used.

-Olefin-based thermoplastic resin-
Examples of the olefinic thermoplastic resin include polyolefin that forms a hard segment of an olefinic thermoplastic elastomer used in a tire skeleton described later.
Specific examples of the olefin-based thermoplastic resin include a polyethylene-based thermoplastic resin, a polypropylene-based thermoplastic resin, a polybutadiene-based thermoplastic resin, and the like. Among these, from the viewpoints of heat resistance and processability, the olefin thermoplastic resin is preferably a polypropylene thermoplastic resin.
Specific examples of the polypropylene-based thermoplastic resin include a propylene homopolymer, a propylene-α-olefin random copolymer, a propylene-α-olefin block copolymer, and the like. Examples of the α-olefin include propylene, 1-butene, 1-pentene, 3-methyl-1-butene, 1-hexene, 4-methyl-1-pentene, 3-methyl-1-pentene, 1-heptene, Examples include α-olefins having about 3 to 20 carbon atoms such as 1-octene, 1-decene, 1-dodecene, 1-tetradecene, 1-hexadecene, 1-octadecene, and 1-eicocene.

  The coating resin layer may contain components other than the thermoplastic resin and the thermoplastic elastomer. Examples of other components include rubbers, thermoplastic resins, various fillers (for example, silica, calcium carbonate, clay, etc.), anti-aging agents, oils, plasticizers, color formers, weathering agents, and the like.

(Physical properties)
-Thickness The average thickness of the coating resin layer is not particularly limited. From the viewpoint of excellent durability and weldability, it is preferably 10 μm or more and 1000 μm or less, and more preferably 50 μm or more and 700 μm or less.

  The average thickness of the coating resin layer was obtained by acquiring SEM images of cross sections obtained by cutting the resin-metal composite member along the lamination direction of the metal member, the adhesive layer, and the coating resin layer from arbitrary five locations. It is set as the number average value of the thickness of the coating resin layer measured from the image. The thickness of the coating resin layer in each SEM image is a value measured at the thinnest part (the part where the distance between the interface between the adhesive layer and the coating resin layer and the outer edge of the resin-metal composite member is minimum). And

-Tensile elastic modulus The tensile elastic modulus of the coating resin layer is preferably larger than the tensile elastic modulus of the adhesive layer, for example, 50 MPa or more and 1000 MPa or less. 50 MPa or more and 700 MPa or less are more preferable.
The tensile elastic modulus of the coating resin layer can be controlled by, for example, the type of resin contained in the coating resin layer.
The tensile modulus is measured according to JIS K7113: 1995.
Specifically, for example, Shimadzu Corporation, Shimadzu Autograph AGS-J (5KN) is used, the tensile velocity is set to 100 mm / min, and the tensile elastic modulus is measured. In addition, when measuring the tensile elasticity modulus of the coating resin layer contained in the resin metal composite member, for example, a measurement sample made of the same material as the coating resin layer may be separately prepared and the elasticity modulus may be measured.

<Tire>
The tire of the present invention includes an annular tire skeleton including an elastic material and the above-described resin-metal composite member for tire according to the present invention.
The resin-metal composite member for tire is used as a reinforcing belt member, a bead member, or the like that is wound around the outer peripheral portion of the tire frame body in the circumferential direction, for example.
Here, the tire skeleton constituting the tire of the present invention will be described.

[Tire skeleton body]
The tire skeleton is formed of an elastic material. That is, as a tire skeleton body, an aspect formed with a rubber material as an elastic material (a so-called tire skeleton body for a rubber tire), an aspect formed with a resin material as an elastic material (a so-called tire skeleton body for a resin tire), etc. Is mentioned.

(Elastic material: rubber material)
The rubber material should just contain rubber | gum (rubber component) at least, and may contain other components, such as an additive, in the range which does not impair the effect of this invention. However, the content of rubber (rubber component) in the rubber material is preferably 50% by mass or more, and more preferably 90% by mass or more based on the total amount of the rubber material. The tire frame body can be formed using, for example, a rubber material.

The rubber component used in the tire frame is not particularly limited, and natural rubber and various synthetic rubbers that are conventionally used for rubber blending can be used alone or in combination of two or more. For example, a rubber as shown below or a blend of two or more of these can be used.
The natural rubber may be a sheet rubber or a block rubber, and all of RSS # 1 to # 5 can be used.
As the synthetic rubber, various diene synthetic rubbers, diene copolymer rubbers, special rubbers, modified rubbers, and the like can be used. Specifically, for example, a butadiene polymer such as polybutadiene (BR), a copolymer of butadiene and an aromatic vinyl compound (eg, SBR, NBR, etc.), a copolymer of butadiene and another diene compound, and the like; Isoprene polymers such as polyisoprene (IR), copolymers of isoprene and aromatic vinyl compounds, copolymers of isoprene and other diene compounds; chloroprene rubber (CR), butyl rubber (IIR), halogenated Examples include butyl rubber (X-IIR); ethylene-propylene copolymer rubber (EPM), ethylene-propylene-diene copolymer rubber (EPDM), and any blend thereof.

Further, the rubber material used for the tire frame may be added with other components such as additives depending on the purpose.
Examples of additives include reinforcing materials such as carbon black, fillers, vulcanizing agents, vulcanization accelerators, fatty acids or salts thereof, metal oxides, process oils, anti-aging agents, and the like. can do.

  A tire skeleton formed of a rubber material is obtained by molding an unvulcanized rubber material in which the contained rubber is in an unvulcanized state into the shape of a tire skeleton and vulcanizing the rubber by heating.

(Elastic material: resin material)
The resin material should just contain resin (resin component) at least, and may contain other components, such as an additive, in the range which does not impair the effect of this invention. However, the content of the resin (resin component) in the resin material is preferably 50% by mass or more, and more preferably 90% by mass or more based on the total amount of the resin material. The tire skeleton can be formed using, for example, a resin material.

  Examples of the resin contained in the tire skeleton include thermoplastic resins, thermoplastic elastomers, and thermosetting resins. From the viewpoint of ride comfort during traveling, the resin material preferably includes a thermoplastic elastomer, and more preferably includes a polyamide-based thermoplastic elastomer.

Examples of the thermosetting resin include phenol-based thermosetting resins, urea-based thermosetting resins, melamine-based thermosetting resins, and epoxy-based thermosetting resins.
Examples of the thermoplastic resin include polyamide-based thermoplastic resins, polyester-based thermoplastic resins, olefin-based thermoplastic resins, polyurethane-based thermoplastic resins, vinyl chloride-based thermoplastic resins, polystyrene-based thermoplastic resins, and the like. You may use these individually or in combination of 2 or more types. Among these, the thermoplastic resin is preferably at least one selected from polyamide-based thermoplastic resins, polyester-based thermoplastic resins, and olefin-based thermoplastic resins, and is selected from polyamide-based thermoplastic resins and olefin-based thermoplastic resins. More preferably, at least one selected from the group consisting of

Examples of the thermoplastic elastomer include a polyamide-based thermoplastic elastomer (TPA), a polystyrene-based thermoplastic elastomer (TPS), a polyurethane-based thermoplastic elastomer (TPU), an olefin-based thermoplastic elastomer (TPO) defined in JIS K6418, Examples thereof include polyester-based thermoplastic elastomer (TPEE), crosslinked thermoplastic rubber (TPV), and other thermoplastic elastomers (TPZ). In consideration of elasticity required during traveling, moldability during production, and the like, it is preferable to use a thermoplastic resin as the resin material forming the tire frame, and it is more preferable to use a thermoplastic elastomer.
In the present invention, the same type of resin as the coating resin layer contained in the resin-metal composite member is used (for example, when the coating resin layer contains a polyester-based thermoplastic resin or thermoplastic elastomer, the tire frame body also has a polyester-based resin. Use a thermoplastic resin or thermoplastic elastomer, and if the coating resin layer contains a polyamide-based thermoplastic resin or thermoplastic elastomer, use a polyamide-based thermoplastic resin or thermoplastic elastomer for the tire frame as well) From the viewpoint of adhesiveness.

-Polyamide thermoplastic elastomer-
The polyamide-based thermoplastic elastomer is a thermoplastic resin material made of a copolymer having a crystalline polymer having a high melting point and a non-crystalline polymer having a low glass transition temperature. It means that having an amide bond (—CONH—) in the main chain of the polymer forming the hard segment.
As the polyamide-based thermoplastic elastomer, for example, at least a polyamide is a crystalline hard crystalline segment with a high melting point, and other polymers (for example, polyester, polyether, etc.) are amorphous and have a soft glass transition temperature low soft segment. The material which forms is mentioned. The polyamide-based thermoplastic elastomer may be formed using a chain extender such as dicarboxylic acid in addition to the hard segment and the soft segment.
Specific examples of the polyamide-based thermoplastic elastomer include an amide-based thermoplastic elastomer (TPA) defined in JIS K6418: 2007, a polyamide-based elastomer described in JP-A-2004-346273, and the like. it can.

  In the polyamide-based thermoplastic elastomer, examples of the polyamide that forms the hard segment include polyamides produced from monomers represented by the following general formula (1) or general formula (2).

General formula (1)

[In General Formula (1), R ¹ represents a molecular chain of a hydrocarbon having 2 to 20 carbon atoms (for example, an alkylene group having 2 to 20 carbon atoms). ]

General formula (2)

[In General Formula (2), R ² represents a molecular chain of a hydrocarbon having 3 to 20 carbon atoms (for example, an alkylene group having 3 to 20 carbon atoms). ]

In general formula (1), R ¹ is preferably a hydrocarbon molecular chain having 3 to 18 carbon atoms, such as an alkylene group having 3 to 18 carbon atoms, and a hydrocarbon molecular chain having 4 to 15 carbon atoms, such as carbon. An alkylene group having 4 to 15 carbon atoms is more preferable, and a molecular chain of a hydrocarbon having 10 to 15 carbon atoms, for example, an alkylene group having 10 to 15 carbon atoms is particularly preferable.
In general formula (2), R ² is preferably a hydrocarbon molecular chain having 3 to 18 carbon atoms, such as an alkylene group having 3 to 18 carbon atoms, and a hydrocarbon molecular chain having 4 to 15 carbon atoms, For example, an alkylene group having 4 to 15 carbon atoms is more preferable, and a molecular chain of a hydrocarbon having 10 to 15 carbon atoms, for example, an alkylene group having 10 to 15 carbon atoms is particularly preferable.
Examples of the monomer represented by the general formula (1) or the general formula (2) include ω-aminocarboxylic acid or lactam. Examples of the polyamide forming the hard segment include polycondensates of these ω-aminocarboxylic acids or lactams, and co-condensation polymers of diamines and dicarboxylic acids.

The ω-aminocarboxylic acid has 6 to 20 carbon atoms such as 6-aminocaproic acid, 7-aminoheptanoic acid, 8-aminooctanoic acid, 10-aminocapric acid, 11-aminoundecanoic acid, 12-aminododecanoic acid and the like. Aliphatic omega-aminocarboxylic acid etc. can be mentioned. Moreover, as a lactam, C5-C20 aliphatic lactams, such as lauryl lactam, (epsilon) -caprolactam, udecan lactam, (omega) -enantolactam, 2-pyrrolidone, etc. can be mentioned.
Examples of the diamine include ethylene diamine, trimethylene diamine, tetramethylene diamine, hexamethylene diamine, heptamethylene diamine, octamethylene diamine, nonamethylene diamine, decamethylene diamine, undecamethylene diamine, dodecamethylene diamine, 2, 2, 4 Examples include diamine compounds such as aliphatic diamines having 2 to 20 carbon atoms such as trimethylhexamethylenediamine, 2,4,4-trimethylhexamethylenediamine, 3-methylpentamethylenediamine, and metaxylenediamine.
Further, dicarboxylic _{^{acids, HOOC- (R 3) m -COOH}} (R 3: the molecular chain of a hydrocarbon of 3 to 20 carbon atoms, m: 0 or 1) can be represented by, for example, oxalic acid, succinic acid And aliphatic dicarboxylic acids having 2 to 20 carbon atoms such as glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid and dodecanedioic acid.
As the polyamide that forms the hard segment, polyamide obtained by ring-opening polycondensation of lauryl lactam, ε-caprolactam, or udecan lactam can be preferably used.

Moreover, as a polymer which forms a soft segment, polyester, polyether, etc. are mentioned, for example, Polyethylene glycol, polypropylene glycol, polytetramethylene ether glycol, ABA type | mold triblock polyether etc. are mentioned specifically ,. These can be used alone or in combination of two or more. Moreover, polyether diamine etc. which are obtained by making ammonia etc. react with the terminal of polyether can also be used.
Here, the “ABA type triblock polyether” means a polyether represented by the following general formula (3).

General formula (3)
[In general formula (3), x and z represent the integer of 1-20. y represents an integer of 4 to 50. ]

  In the general formula (3), each of x and z is preferably an integer of 1 to 18, more preferably an integer of 1 to 16, still more preferably an integer of 1 to 14, and particularly preferably an integer of 1 to 12. In general formula (3), y is preferably an integer of 5 to 45, more preferably an integer of 6 to 40, still more preferably an integer of 7 to 35, and particularly preferably an integer of 8 to 30.

  As a combination of a hard segment and a soft segment, each combination of the hard segment and the soft segment mentioned above can be mentioned. Among these, combinations of hard segment and soft segment include lauryl lactam ring-opening polycondensate / polyethylene glycol combination, lauryl lactam ring-opening polycondensate / polypropylene glycol combination, and lauryl lactam ring-opening polycondensation. Preferred is a combination of isomers / polytetramethylene ether glycol, or a ring-opening polycondensate of lauryl lactam / ABA type triblock polyether, and a combination of ring-opening polycondensate of lauryl lactam / ABA type triblock polyether is more preferable. preferable.

  The number average molecular weight of the polymer (polyamide) forming the hard segment is preferably 300 to 15000 from the viewpoint of melt moldability. Moreover, as a number average molecular weight of the polymer which forms a soft segment, 200-6000 are preferable from a viewpoint of toughness and low temperature flexibility. Furthermore, the mass ratio (x: y) to the hard segment (x) and the soft segment (y) is preferably 50:50 to 90:10, more preferably 50:50 to 80:20, from the viewpoint of moldability. .

  The polyamide-based thermoplastic elastomer can be synthesized by copolymerizing a polymer forming a hard segment and a polymer forming a soft segment by a known method.

  Examples of commercially available products of polyamide-based thermoplastic elastomer include UBE Kosan's “UBESTA XPA” series (for example, XPA9063X1, XPA9055X1, XPA9048X2, XPA9048X1, XPA9040X1, XPA9040X2XPA9044, etc.) and “Vestamide” of Daicel Eponic Corporation. ”Series (for example, E40-S3, E47-S1, E47-S3, E55-S1, E55-S3, EX9200, E50-R2, etc.) and the like can be used.

  The polyamide-based thermoplastic elastomer is suitable as a resin material because it satisfies the performance required as a tire frame from the viewpoint of elastic modulus (flexibility), strength, and the like. In addition, polyamide-based thermoplastic elastomers often have good adhesion to thermoplastic resins and thermoplastic elastomers.

-Polystyrene thermoplastic elastomer As the polystyrene thermoplastic elastomer, for example, at least polystyrene forms a hard segment, and other polymers (for example, polybutadiene, polyisoprene, polyethylene, hydrogenated polybutadiene, hydrogenated polyisoprene, etc.) are not. Examples thereof include materials that form a soft segment having a crystallinity and a low glass transition temperature. As the polystyrene forming the hard segment, for example, those obtained by a known radical polymerization method, ionic polymerization method and the like are preferably used, and specifically, polystyrene having anion living polymerization can be mentioned. Examples of the polymer that forms the soft segment include polybutadiene, polyisoprene, and poly (2,3-dimethyl-butadiene).

  As a combination of a hard segment and a soft segment, each combination of the hard segment and the soft segment mentioned above can be mentioned. Among these, the combination of the hard segment and the soft segment is preferably a combination of polystyrene / polybutadiene or a combination of polystyrene / polyisoprene. Moreover, in order to suppress the unintended cross-linking reaction of the thermoplastic elastomer, the soft segment is preferably hydrogenated.

The number average molecular weight of the polymer (polystyrene) forming the hard segment is preferably 5,000 to 500,000, and more preferably 10,000 to 200,000.
Moreover, as a number average molecular weight of the polymer which forms a soft segment, 5000-1 million are preferable, 10000-800000 are more preferable, and 30000-500000 are still more preferable. Furthermore, the volume ratio (x: y) to the hard segment (x) and the soft segment (y) is preferably 5:95 to 80:20 and more preferably 10:90 to 70:30 from the viewpoint of moldability. .

The polystyrene-based thermoplastic elastomer can be synthesized by copolymerizing a polymer forming a hard segment and a polymer forming a soft segment by a known method.
Examples of the polystyrene-based thermoplastic elastomer include styrene-butadiene copolymer [SBS (polystyrene-poly (butylene) block-polystyrene), SEBS (polystyrene-poly (ethylene / butylene) block-polystyrene)], styrene-isoprene. Copolymer (polystyrene-polyisoprene block-polystyrene), styrene-propylene copolymer [SEP (polystyrene- (ethylene / propylene) block), SEPS (polystyrene-poly (ethylene / propylene) block-polystyrene), SEPS ( Polystyrene-poly (ethylene-ethylene / propylene) block-polystyrene), SEB (polystyrene (ethylene / butylene) block)] and the like.

  As a commercially available product of polystyrene-based thermoplastic elastomer, for example, “Tough Tech” series (for example, H1031, H1041, H1043, H1051, H1052, H1053, H1062, H1082, H1141, H1221, H1272, etc.) manufactured by Asahi Kasei Corporation, “SEBS” series (8007, 8076, etc.) and “SEPS” series (2002, 2063, etc.) manufactured by Kuraray Co., Ltd. can be used.

-Polyurethane thermoplastic elastomer-
As polyurethane-based thermoplastic elastomers, for example, at least polyurethane forms a hard segment in which pseudo-crosslinking is formed by physical aggregation, and other polymers form a soft segment with a low glass transition temperature that is amorphous. Material.
Specific examples of the polyurethane-based thermoplastic elastomer include a polyurethane-based thermoplastic elastomer (TPU) defined in JIS K6418: 2007. The polyurethane-based thermoplastic elastomer can be represented as a copolymer including a soft segment including a unit structure represented by the following formula A and a hard segment including a unit structure represented by the following formula B.

[Wherein P represents a long-chain aliphatic polyether or a long-chain aliphatic polyester. R represents an aliphatic hydrocarbon, an alicyclic hydrocarbon, or an aromatic hydrocarbon. P ′ represents a short-chain aliphatic hydrocarbon, alicyclic hydrocarbon, or aromatic hydrocarbon. ]

In the formula A, as the long-chain aliphatic polyether or long-chain aliphatic polyester represented by P, for example, those having a molecular weight of 500 to 5000 can be used. P is derived from a diol compound containing a long-chain aliphatic polyether represented by P and a long-chain aliphatic polyester. Examples of such a diol compound include polyethylene glycol, polypropylene glycol, polytetramethylene ether glycol, poly (butylene abido) diol, poly-ε-caprolactone diol, poly (hexamethylene carbonate) having a molecular weight within the above range. ) Diol, ABA type triblock polyether and the like.
These can be used alone or in combination of two or more.

In Formula A and Formula B, R is a partial structure introduced using a diisocyanate compound containing an aliphatic hydrocarbon, an alicyclic hydrocarbon, or an aromatic hydrocarbon represented by R. Examples of the aliphatic diisocyanate compound containing an aliphatic hydrocarbon represented by R include 1,2-ethylene diisocyanate, 1,3-propylene diisocyanate, 1,4-butane diisocyanate, 1,6-hexamethylene diisocyanate, and the like. Can be mentioned.
Examples of the diisocyanate compound containing an alicyclic hydrocarbon represented by R include 1,4-cyclohexane diisocyanate and 4,4-cyclohexane diisocyanate. Furthermore, examples of the aromatic diisocyanate compound containing an aromatic hydrocarbon represented by R include 4,4′-diphenylmethane diisocyanate and tolylene diisocyanate.
These can be used alone or in combination of two or more.

In the formula B, as the short chain aliphatic hydrocarbon, alicyclic hydrocarbon, or aromatic hydrocarbon represented by P ′, for example, those having a molecular weight of less than 500 can be used. P ′ is derived from a diol compound containing a short-chain aliphatic hydrocarbon, alicyclic hydrocarbon, or aromatic hydrocarbon represented by P ′. Examples of the aliphatic diol compound containing a short-chain aliphatic hydrocarbon represented by P ′ include glycol and polyalkylene glycol. Specifically, ethylene glycol, propylene glycol, trimethylene glycol, 1, 4 -Butanediol, 1,3-butanediol, 1,5-pentanediol, 1,6-hexanediol, 1,7-heptanediol, 1,8-octanediol, 1,9-nonanediol, 1,10- A decanediol etc. are mentioned.
Examples of the alicyclic diol compound containing an alicyclic hydrocarbon represented by P ′ include cyclopentane-1,2-diol, cyclohexane-1,2-diol, cyclohexane-1,3-diol, Examples include cyclohexane-1,4-diol and cyclohexane-1,4-dimethanol.
Furthermore, examples of the aromatic diol compound containing an aromatic hydrocarbon represented by P ′ include hydroquinone, resorcin, chlorohydroquinone, bromohydroquinone, methylhydroquinone, phenylhydroquinone, methoxyhydroquinone, phenoxyhydroquinone, 4,4′- Dihydroxybiphenyl, 4,4′-dihydroxydiphenyl ether, 4,4′-dihydroxydiphenyl sulfide, 4,4′-dihydroxydiphenylsulfone, 4,4′-dihydroxybenzophenone, 4,4′-dihydroxydiphenylmethane, bisphenol A, 1, Examples include 1-di (4-hydroxyphenyl) cyclohexane, 1,2-bis (4-hydroxyphenoxy) ethane, 1,4-dihydroxynaphthalene, 2,6-dihydroxynaphthalene and the like.
These can be used alone or in combination of two or more.

  The number average molecular weight of the polymer (polyurethane) forming the hard segment is preferably 300 to 1500 from the viewpoint of melt moldability. Further, the number average molecular weight of the polymer forming the soft segment is preferably 500 to 20000, more preferably 500 to 5000, and particularly preferably 500 to 3000 from the viewpoints of flexibility and thermal stability of the polyurethane-based thermoplastic elastomer. . Further, the mass ratio (x: y) to the hard segment (x) and the soft segment (y) is preferably 15:85 to 90:10, more preferably 30:70 to 90:10, from the viewpoint of moldability. .

The polyurethane-based thermoplastic elastomer can be synthesized by copolymerizing a polymer forming a hard segment and a polymer forming a soft segment by a known method. As the polyurethane-based thermoplastic elastomer, for example, thermoplastic polyurethane described in JP-A-5-331256 can be used.
As the polyurethane-based thermoplastic elastomer, specifically, a combination of a hard segment composed of an aromatic diol and an aromatic diisocyanate and a soft segment composed of a polycarbonate is preferable. More specifically, tolylene diisocyanate ( TDI) / polyester-based polyol copolymer, TDI / polyether-based polyol copolymer, TDI / caprolactone-based polyol copolymer, TDI / polycarbonate-based polyol copolymer, 4,4′-diphenylmethane diisocyanate (MDI) / polyester -Based polyol copolymer, MDI / polyether-based polyol copolymer, MDI / caprolactone-based polyol copolymer, MDI / polycarbonate-based polyol copolymer, and MDI + hydroquinone / polyhexamethylene At least one selected from carbonate copolymers is preferable, TDI / polyester polyol copolymer, TDI / polyether polyol copolymer, MDI / polyester polyol copolymer, MDI / polyether polyol copolymer, And at least one selected from MDI + hydroquinone / polyhexamethylene carbonate copolymer is more preferable.

  Examples of commercially available polyurethane-based thermoplastic elastomers include, for example, “Elastollan” series (for example, ET680, ET880, ET690, ET890, etc.) manufactured by BASF, and “Clamiron U” series (for example, Kuraray Co., Ltd.) 2000 series, 3000 series, 8000 series, 9000 series, etc.) "Milactolan" series (for example, XN-2001, XN-2004, P390RSUP, P480RSUI, P26MRNAT, E490, E590, P890, etc.) manufactured by Japan Miraclan Co., Ltd. Etc. can be used.

-Olefin thermoplastic elastomer-
As the olefin-based thermoplastic elastomer, for example, at least a polyolefin forms a hard segment with a crystalline and high melting point, and other polymers (for example, polyolefin, other polyolefins, polyvinyl compounds, etc.) are amorphous and have a glass transition temperature. Examples include materials that form low soft segments. Examples of the polyolefin forming the hard segment include polyethylene, polypropylene, isotactic polypropylene, polybutene, and the like.
Examples of the olefinic thermoplastic elastomer include olefin-α-olefin random copolymers, olefin block copolymers, and the like. Specifically, propylene block copolymers, ethylene-propylene copolymers, propylene- 1-hexene copolymer, propylene-4-methyl-1-pentene copolymer, propylene-1-butene copolymer, ethylene-1-hexene copolymer, ethylene-4-methyl-pentene copolymer, ethylene- 1-butene copolymer, 1-butene-1-hexene copolymer, 1-butene-4-methyl-pentene, ethylene-methacrylic acid copolymer, ethylene-methyl methacrylate copolymer, ethylene-ethyl methacrylate Copolymer, ethylene-butyl methacrylate copolymer, ethylene-methyl acrylate copolymer Ethylene-ethyl acrylate copolymer, ethylene-butyl acrylate copolymer, propylene-methacrylic acid copolymer, propylene-methyl methacrylate copolymer, propylene-ethyl methacrylate copolymer, propylene-butyl methacrylate copolymer , Propylene-methyl acrylate copolymer, propylene-ethyl acrylate copolymer, propylene-butyl acrylate copolymer, ethylene-vinyl acetate copolymer, propylene-vinyl acetate copolymer, and the like.

Among these, as the olefinic thermoplastic elastomer, propylene block copolymer, ethylene-propylene copolymer, propylene-1-hexene copolymer, propylene-4-methyl-1-pentene copolymer, propylene-1- Butene copolymer, ethylene-1-hexene copolymer, ethylene-4-methyl-pentene copolymer, ethylene-1-butene copolymer, ethylene-methacrylic acid copolymer, ethylene-methyl methacrylate copolymer , Ethylene-ethyl methacrylate copolymer, ethylene-butyl methacrylate copolymer, ethylene-methyl acrylate copolymer, ethylene-ethyl acrylate copolymer, ethylene-butyl acrylate copolymer, propylene-methacrylic acid copolymer , Propylene-methyl methacrylate copolymer, pro Lene-ethyl methacrylate copolymer, propylene-butyl methacrylate copolymer, propylene-methyl acrylate copolymer, propylene-ethyl acrylate copolymer, propylene-butyl acrylate copolymer, ethylene-vinyl acetate copolymer, And at least one selected from propylene-vinyl acetate copolymer, ethylene-propylene copolymer, propylene-1-butene copolymer, ethylene-1-butene copolymer, ethylene-methyl methacrylate copolymer More preferred is at least one selected from ethylene-methyl acrylate copolymer, ethylene-ethyl acrylate copolymer, and ethylene-butyl acrylate copolymer.
Further, two or more olefin resins such as ethylene and propylene may be used in combination. Moreover, 50 mass% or more and 100 mass% or less of the olefin resin content rate in an olefin type thermoplastic elastomer are preferable.

The number average molecular weight of the olefinic thermoplastic elastomer is preferably 5,000 to 10,000,000. When the number average molecular weight of the olefinic thermoplastic elastomer is 5,000 to 10,000,000, the mechanical properties of the thermoplastic resin material are sufficient and the processability is also excellent. From the same viewpoint, the number average molecular weight of the olefinic thermoplastic elastomer is more preferably 7,000 to 1,000,000, and particularly preferably 10,000 to 1,000,000. Thereby, the mechanical properties and processability of the thermoplastic resin material can be further improved. Moreover, as a number average molecular weight of the polymer which forms a soft segment, 200-6000 are preferable from a viewpoint of toughness and low temperature flexibility. Furthermore, the mass ratio (x: y) to the hard segment (x) and the soft segment (y) is preferably 50:50 to 95:15, and more preferably 50:50 to 90:10, from the viewpoint of moldability. .
The olefinic thermoplastic elastomer can be synthesized by copolymerization by a known method.

Further, as the olefinic thermoplastic elastomer, one obtained by acid-modifying a thermoplastic elastomer may be used.
“A product obtained by acid-modifying an olefinic thermoplastic elastomer” means that an unsaturated compound having an acidic group such as a carboxylic acid group, a sulfuric acid group, or a phosphoric acid group is bonded to the olefinic thermoplastic elastomer.
Examples of bonding an unsaturated compound having an acidic group such as a carboxylic acid group, sulfuric acid group or phosphoric acid group to an olefinic thermoplastic elastomer include, for example, an unsaturated compound having an acidic group to an olefinic thermoplastic elastomer, Examples include bonding (for example, graft polymerization) an unsaturated bond site of an unsaturated carboxylic acid (generally maleic anhydride).
The unsaturated compound having an acidic group is preferably an unsaturated compound having a carboxylic acid group which is a weak acid group from the viewpoint of suppressing deterioration of the olefin-based thermoplastic elastomer. For example, acrylic acid, methacrylic acid, itaconic acid, croton Examples include acids, isocrotonic acid, maleic acid and the like.

  Examples of commercially available olefin-based thermoplastic elastomers include “Tuffmer” series (for example, A0550S, A1050S, A4050S, A1070S, A4070S, A35070S, A1085S, A4085S, A7090, A70090, MH7007, MH7010, manufactured by Mitsui Chemicals, Inc. XM-7070, XM-7080, BL4000, BL2481, BL3110, BL3450, P-0275, P-0375, P-0775, P-0180, P-0280, P-0480, P-0680, etc.), Mitsui DuPont “Nucleel” series (for example, AN4214C, AN4225C, AN42115C, N0903HC, N0908C, AN42012C, N410, N1050H, N1108C manufactured by Polychemical Co., Ltd. N1110H, N1207C, N1214, AN4221C, N1525, N1560, N0200H, AN4228C, AN4213C, N035C, etc. "Elvalloy AC" series (for example, 1125AC, 1209AC, 1218AC, 1609AC, 1820AC, 1913AC, 2112AC, 2116AC, 2615AC, 2715AC, etc. 3117AC, 3427AC, 3717AC, etc.), Sumitomo Chemical Co., Ltd.'s "Acryt" series, "Evaate" series, etc., Tosoh Corporation's "Ultrasen" series, etc., "Prime TPO" series made by prime polymers (for example, E-2900H, F-3900H, E-2900, F-3900, J-5900, E-2910, F-3910, J-5910, E-2710, F- 710, J-5910, E-2740, F-3740, R110MP, R110E, can be used T310E, also M142E, etc.) and the like.

-Polyester thermoplastic elastomer-
As the polyester-based thermoplastic elastomer, for example, at least a polyester is crystalline and a hard segment having a high melting point is formed, and another polymer (eg, polyester or polyether) is amorphous and has a low glass transition temperature. The material which forms is mentioned.

An aromatic polyester can be used as the polyester forming the hard segment. The aromatic polyester can be formed, for example, from an aromatic dicarboxylic acid or an ester-forming derivative thereof and an aliphatic diol. The aromatic polyester is preferably polybutylene terephthalate derived from at least one of terephthalic acid and dimethyl terephthalate and 1,4-butanediol. The aromatic polyester may be, for example, isophthalic acid, phthalic acid, naphthalene-2,6-dicarboxylic acid, naphthalene-2,7-dicarboxylic acid, diphenyl-4,4′-dicarboxylic acid, diphenoxyethanedicarboxylic acid, 5 -Dicarboxylic acid components such as sulfoisophthalic acid or their ester-forming derivatives and diols having a molecular weight of 300 or less (for example, ethylene glycol, trimethylene glycol, pentamethylene glycol, hexamethylene glycol, neopentyl glycol, decamethylene glycol, etc. Aliphatic diols such as 1,4-cyclohexanedimethanol, tricyclodecane dimethylol and the like; xylylene glycol, bis (p-hydroxy) diphenyl, bis (p-hydroxyphenyl) propane, 2,2- Bi [4- (2-hydroxyethoxy) phenyl] propane, bis [4- (2-hydroxy) phenyl] sulfone, 1,1-bis [4- (2-hydroxyethoxy) phenyl] cyclohexane, 4,4′- Aromatic diols such as dihydroxy-p-terphenyl and 4,4′-dihydroxy-p-quarterphenyl; etc.) and polyesters derived from these, or a co-combination of two or more of these dicarboxylic acid components and diol components Polymerized polyester may also be used. It is also possible to copolymerize a trifunctional or higher polyfunctional carboxylic acid component, polyfunctional oxyacid component, polyfunctional hydroxy component and the like in a range of 5 mol% or less.
Examples of the polyester forming the hard segment include polyethylene terephthalate, polybutylene terephthalate, polymethylene terephthalate, polyethylene naphthalate, polybutylene naphthalate, and the like, and polybutylene terephthalate is preferable.

Moreover, as a polymer which forms a soft segment, aliphatic polyester, aliphatic polyether, etc. are mentioned, for example.
Aliphatic polyethers include poly (ethylene oxide) glycol, poly (propylene oxide) glycol, poly (tetramethylene oxide) glycol, poly (hexamethylene oxide) glycol, copolymers of ethylene oxide and propylene oxide, poly (propylene oxide) And ethylene oxide addition polymer of glycol, and a copolymer of ethylene oxide and tetrahydrofuran.
Examples of the aliphatic polyester include poly (ε-caprolactone), polyenantlactone, polycaprylolactone, polybutylene adipate, and polyethylene adipate.
Among these aliphatic polyethers and aliphatic polyesters, poly (tetramethylene oxide) glycol, poly (propylene oxide) glycol are polymers that form soft segments from the viewpoint of the elastic properties of the resulting polyester block copolymer. Preferred are ethylene oxide adducts, poly (ε-caprolactone), polybutylene adipate, polyethylene adipate, and the like.

  The number average molecular weight of the polymer forming the soft segment is preferably 300 to 6000 from the viewpoint of toughness and low temperature flexibility. Furthermore, the mass ratio (x: y) between the hard segment (x) and the soft segment (y) is preferably 99: 1 to 20:80, more preferably 98: 2 to 30:70, from the viewpoint of moldability. .

  As a combination of the above-mentioned hard segment and a soft segment, each combination of the above-mentioned hard segment and a soft segment can be mentioned, for example. Among these, the combination of the hard segment and the soft segment described above is preferably a combination in which the hard segment is polybutylene terephthalate, the soft segment is an aliphatic polyether, and the hard segment is polybutylene terephthalate. More preferred is a combination wherein is poly (ethylene oxide) glycol.

  Examples of commercially available polyester-based thermoplastic elastomers include “Hytrel” series (for example, 3046, 5557, 6347, 4047, 4767, etc.) manufactured by Toray DuPont Co., Ltd., and “Perprene” series manufactured by Toyobo Co., Ltd. (For example, P30B, P40B, P40H, P55B, P70B, P150B, P280B, P450B, P150M, S1001, S2001, S5001, S6001, S9001, etc.) can be used.

  The polyester-based thermoplastic elastomer can be synthesized by copolymerizing a polymer forming a hard segment and a polymer forming a soft segment by a known method.

-Other ingredients-
The elastic material (rubber material or resin material) may contain other components than rubber or resin as desired. Examples of other components include resins, rubbers, various fillers (for example, silica, calcium carbonate, clay), anti-aging agents, oils, plasticizers, colorants, weathering agents, reinforcing materials, and the like.

-Physical properties of elastic materials-
When a resin material is used as the elastic material (that is, in the case of a tire skeleton for a resin tire), the melting point of the resin contained in the resin material is, for example, about 100 ° C. to 350 ° C., and the durability and productivity of the tire are increased. From the viewpoint, about 100 ° C to 250 ° C is preferable, and 120 ° C to 250 ° C is more preferable.

  The tensile modulus of elasticity defined in JIS K7113: 1995 of the elastic material (tire frame) itself is preferably 50 MPa to 1000 MPa, more preferably 50 MPa to 800 MPa, and particularly preferably 50 MPa to 700 MPa. When the elastic modulus of the elastic material is 50 MPa to 1000 MPa, the rim can be assembled efficiently while maintaining the shape of the tire frame.

  The tensile strength defined in JIS K7113 (1995) of the elastic material (tire frame) itself is usually about 15 MPa to 70 MPa, preferably 17 MPa to 60 MPa, and more preferably 20 MPa to 55 MPa.

  The tensile yield strength specified in JIS K7113 (1995) of the elastic material (tire frame) itself is preferably 5 MPa or more, more preferably 5 MPa to 20 MPa, and particularly preferably 5 MPa to 17 MPa. When the tensile yield strength of the elastic material is 5 MPa or more, the elastic material can withstand deformation against a load applied to the tire during traveling.

  The tensile yield elongation of the elastic material (tire frame) itself as defined in JIS K7113 (1995) is preferably 10% or more, more preferably 10% to 70%, and particularly preferably 15% to 60%. When the tensile yield elongation of the elastic material is 10% or more, the elastic region is large and the rim assembly property can be improved.

  The tensile elongation at break specified by JIS K7113 (1995) of the elastic material (tire frame) itself is preferably 50% or more, more preferably 100% or more, particularly preferably 150% or more, and most preferably 200% or more. When the tensile breaking elongation of the elastic material is 50% or more, the rim assembly property is good, and it is possible to make it difficult to break against a collision.

  The deflection temperature under load (0.45 MPa load) specified in ISO 75-2 or ASTM D648 of the elastic material (tire frame) itself is preferably 50 ° C or higher, more preferably 50 ° C to 150 ° C, and more preferably 50 ° C to 50 ° C. 130 ° C. is particularly preferred. If the deflection temperature under load of the elastic material is 50 ° C. or higher, deformation of the tire frame can be suppressed even when vulcanization is performed in the manufacture of the tire.

<Tire structure>
Hereinafter, tires according to embodiments of the present invention will be described with reference to the drawings.

  In addition, each figure (FIG. 1A, FIG. 1B, FIG. 2, and FIG. 3) shown below is the figure shown typically, and the magnitude | size and shape of each part are exaggerated suitably for easy understanding. As shown. In the following embodiments, the resin-metal composite member is applied to the belt portion, but the resin-metal composite member may be applied to other parts such as a bead portion in addition to the belt portion.

(First embodiment)
First, a tire 10 according to a first embodiment of the present invention will be described with reference to FIGS. 1A and 1B.
FIG. 1A is a perspective view showing a cross section of a part of the tire according to the first embodiment. FIG. 1B is a cross-sectional view of a bead portion attached to a rim. As shown in FIG. 1A, a tire 10 according to the first embodiment has a cross-sectional shape substantially similar to that of a conventional general rubber pneumatic tire.

  The tire 10 includes a pair of bead portions 12 that contact the bead seat 21 and the rim flange 22 of the rim 20, a side portion 14 that extends outward in the tire radial direction from the bead portion 12, and a tire radial direction of one side portion 14. A tire frame body 17 including a crown portion (outer peripheral portion) 16 that connects an outer end and an outer end in the tire radial direction of the other side portion 14 is provided. The tire skeleton 17 is formed using a resin material (for example, a polyamide-based thermoplastic elastomer). However, it can also be formed using a rubber material.

  The tire frame body 17 includes an annular tire frame half body (tire frame piece) 17A having the same shape, which is injection-molded by integrating one bead portion 12, one side portion 14, and a half-width crown portion 16 together. It is formed by facing each other and joining at the tire equatorial plane.

  An annular bead core 18 made of a steel cord is embedded in the bead portion 12 in the same manner as a conventional general pneumatic tire. Further, the portion of the bead portion 12 that comes into contact with the rim 20 and at least the portion that comes into contact with the rim flange 22 of the rim 20 are made of rubber, which is a material having better sealing properties than the resin material constituting the tire frame body 17. An annular seal layer 24 is formed.

  In the crown portion 16, the resin-metal composite member 26, which is a reinforcing cord, is embedded in the crown portion 16 in a cross-sectional view along the axial direction of the tire frame body 17. It is spirally wound in the circumferential direction. A tread 30 made of rubber, which is a material superior in wear resistance to the resin material constituting the tire skeleton 17, is disposed on the outer peripheral side of the resin metal composite member 26 in the tire radial direction. Details of the resin-metal composite member 26 will be described later.

  In the tire 10 according to the first embodiment of the present invention, the tire skeleton 17 is formed of a resin material, but may be formed of a rubber material. The tire frame half body 17A has a bilaterally symmetric shape, that is, one tire frame half body 17A and the other tire frame body A have the same shape, and therefore one type of mold for molding the tire frame half body 17A is used. There is a merit that it is sufficient.

  In the tire 10 according to the first embodiment of the present invention, the tire skeleton 17 is formed of a single resin material, but is not limited to such an embodiment, and is made of a conventional general rubber. Similarly to the pneumatic tire, a resin material having different characteristics for each portion (for example, the side portion 14, the crown portion 16, the bead portion 12, etc.) of the tire skeleton 17 may be used. The tire frame 17 may be formed of a single rubber material, and the rubber material having different characteristics for each portion of the tire frame 17 (for example, the side portion 14, the crown portion 16, and the bead portion 12). It can also be formed using. Further, reinforcing materials (polymer materials, metal fibers, cords, non-woven fabrics, woven fabrics, etc.) are embedded in each part of the tire skeleton body 17 (for example, the side portion 14, the crown portion 16, the bead portion 12, etc.). The tire frame body 17 may be reinforced with the reinforcing material.

  In the tire 10 according to the first embodiment of the present invention, the tire frame half body 17A is molded by injection molding, but is not limited thereto, and is molded by, for example, vacuum molding, pressure molding, melt casting, or the like. It may be. Further, in the tire 10 according to the first embodiment, the tire skeleton 17 is formed by joining two members (tire skeleton half 17A), but is not limited thereto, and a low melting point metal is used. The tire skeleton body may be formed as one member by the melting core method, the split core method, or the blow molding used, or may be formed by joining three or more members.

An annular bead core 18 made of a metal cord such as a steel cord is embedded in the bead portion 12 of the tire 10. In addition, as the member including the bead core 18, the resin-metal composite member according to the present invention described above can be used. For example, the bead portion 12 can be formed of a resin-metal composite member.
The bead core 18 may be formed of an organic fiber cord, a resin-coated organic fiber cord, or a hard resin, in addition to the steel cord. The bead core 18 may be omitted if the rigidity of the bead portion 12 is ensured and there is no problem in fitting with the rim 20.
An annular seal layer 24 made of rubber is formed on a portion of the bead portion 12 that contacts the rim 20 and at least a portion of the rim 20 that contacts the rim flange 22. The seal layer 24 may also be formed in a portion where the tire skeleton 17 (bead portion 12) and the bead sheet 21 are in contact with each other. When rubber is used as the material for forming the seal layer 24, it is preferable to use the same type of rubber as that used on the outer surface of the bead portion of a conventional general rubber pneumatic tire. In the case where the tire frame 17 is formed of a resin material, the rubber seal layer 24 is omitted if only the resin material forming the tire frame 17 can secure a sealing property with the rim 20. Also good.

  The seal layer 24 may be formed using another thermoplastic resin or a thermoplastic elastomer that is more excellent in sealability than the resin material forming the tire frame body 17. Examples of such other thermoplastic resins include resins such as polyurethane resins, olefin resins, polystyrene resins, and polyester resins, and blends of these resins with rubbers or elastomers. Thermoplastic elastomers can also be used, and examples thereof include polyester-based thermoplastic elastomers, polyurethane-based thermoplastic elastomers, olefin-based thermoplastic elastomers, combinations of these elastomers, and blends with rubber.

Next, the reinforcing belt member formed of the resin cord member 26 will be described with reference to FIG. Note that the resin-metal composite member according to the present invention described above can be used for the resin cord member 26.
FIG. 2 is a cross-sectional view along the tire rotation axis of the tire 10 according to the first embodiment, and shows a state in which the resin cord member 26 is embedded in the crown portion of the tire frame body 17.
As shown in FIG. 2, the resin cord member 26 is spirally wound in a state in which at least a part thereof is embedded in the crown portion 16 in a cross-sectional view along the axial direction of the tire frame body 17. And the part embed | buried under the crown part 16 of the resin cord member 26 is in the state closely_contact | adhered with the elastic material (rubber material or resin material) which comprises the crown part 16 (tire frame 17). L in FIG. 2 indicates the embedding depth in the tire rotation axis direction of the resin cord member 26 with respect to the crown portion 16 (tire frame body 17). In an embodiment, the embedding depth L of the resin cord member 26 with respect to the crown portion 16 is ½ of the diameter D of the resin cord member 26.

The resin cord member 26 has a structure in which a metal member 27 (for example, a steel cord twisted with steel fibers) is used as a core and the outer periphery of the metal member 27 is covered with a coating resin layer 28 via an adhesive layer 25. doing.
A rubber tread 30 is disposed on the outer peripheral side of the resin cord member 26 in the tire radial direction. Further, the tread 30 is formed with a tread pattern including a plurality of grooves on the ground contact surface with the road surface in the same manner as a conventional rubber pneumatic tire.

  In one embodiment, in the tire 10, the resin cord member 26 coated with the coating resin layer 28 including a thermoplastic elastomer is in close contact with the tire skeleton 17 formed of a resin material including the same type of thermoplastic elastomer. Buried. Therefore, the contact area between the coating resin layer 28 covering the metal member 27 and the tire frame body 17 is increased, and the adhesion durability between the resin cord member 26 and the tire frame body 17 is improved. As a result, the durability of the tire is increased. Will be excellent.

  The embedding depth L of the resin cord member 26 with respect to the crown portion 16 is preferably not less than 1/5 of the diameter D of the resin cord member 26, and more preferably more than 1/2. Further, it is more preferable that the entire resin cord member 26 is embedded in the crown portion 16. If the embedding depth L of the resin cord member 26 exceeds 1/2 of the diameter D of the resin cord member 26, it is difficult to jump out of the buried portion due to the dimension of the resin cord member 26. When the entire resin cord member 26 is embedded in the crown portion 16, the surface (outer peripheral surface) becomes flat, and the member is placed on the crown portion 16 in which the resin cord member 26 is embedded. However, air can be prevented from entering the peripheral portion of the resin cord member 26.

  In the tire 10 according to the first embodiment of the present invention, the tread 30 is formed of rubber, but a tread formed of a thermoplastic resin material having excellent wear resistance may be used instead of rubber.

・ Resin cord member 26
Here, the aspect which uses the resin metal composite member of this invention as the resin cord member 26 is demonstrated.
For example, a belt layer formed by arranging one or a plurality of cord-like resin-metal composite members on the outer periphery of a tire frame body along the circumferential direction of the tire, It can be used as a crossing belt layer or the like that has an angle with respect to the circumferential direction of the tire and is arranged so as to cross each other.

  In the resin-metal composite member, the resin-metal composite member is preferably arranged so that the average distance between adjacent metal members is 400 μm to 3200 μm, more preferably 600 μm to 2200 μm, More preferably, it is arranged to be 800 μm to 1500 μm. When the average distance between the metal members of adjacent resin-metal composite members is 400 μm or more, an increase in the weight of the tire is suppressed and the fuel efficiency during running tends to be excellent. When the average distance between the metal members of adjacent resin-metal composite members is 3200 μm or less, a sufficient tire reinforcing effect tends to be obtained.

  In this specification, “adjacent resin-metal composite members” means a certain resin-metal composite member and another resin-metal composite member located closest to the resin-metal composite member, and are different from each other. Both when the members are adjacent to each other and when different parts of the same resin-metal composite member are adjacent (for example, when a single resin-metal composite member is wound around the outer periphery of the tire frame body multiple times) included.

In this specification, the “average distance between metal members” is a value determined by the following equation.
Formula: Average distance between metal members = {width of belt portion− (thickness of metal member × n)} / (n−1)
The “belt portion” means a portion where the resin-metal composite member is disposed on the outer peripheral portion of the tire frame body.
In the above formula, “n” is the number of resin-metal composite members observed in a cross section obtained by cutting the tire frame body on which the resin-metal composite members are arranged in a direction perpendicular to the radial direction of the tire.
In the above formula, “the width of the belt portion” means the resin metal at the both ends of the resin-metal composite member observed in the cross section (positions farthest from the center line of the tire frame body in the left-right direction). The length between the composite members means the length along the outer peripheral surface of the tire frame.
In the above formula, “the thickness of the metal member” is the number average value of the measured thickness values at five arbitrarily selected locations. When the metal member is composed of one metal cord, the measured thickness value is the maximum diameter of the cross section of the metal member (the distance between two points arbitrarily selected on the contour line of the cross section of the metal member is the maximum). The distance between the two points). When the metal member is composed of a plurality of metal cords, the diameter of the smallest circle among circles including all the cross-sections of the plurality of metal cords observed in the cross-section of the metal member is set.
When metal members having different thicknesses are included in the belt portion, the thickness of the thickest metal member is defined as “the thickness of the metal member”.

Next, a method for manufacturing a tire according to the first embodiment of the present invention will be described.
[Tire skeleton molding process]
First, the tire skeleton halves supported by a thin metal support ring face each other. Next, a joining mold is installed so as to contact the outer peripheral surface of the abutting portion of the tire skeleton half. Here, the said joining metal mold | die is comprised so that the periphery of the junction part (butting part) of a tire frame half body may be pressed with a predetermined pressure (not shown). Next, the periphery of the joint portion of the tire frame half body is pressed at a temperature equal to or higher than the melting point (or softening point) of the thermoplastic resin material (in this embodiment, a polyamide-based thermoplastic elastomer) that forms the tire frame body. When the joint portion of the tire frame half body is heated and pressurized by the bonding mold, the joint portion is melted, the tire frame half halves are fused together, and these members are integrated into the tire frame body 17. Is formed.

[Resin cord member molding process]
Next, a resin cord member molding process in which the resin cord member is formed of the resin metal composite member according to the present invention will be described.
First, for example, the metal member 27 is unwound from a reel and the surface thereof is cleaned. Next, the outer periphery of the metal member 27 is covered with an adhesive extruded from an extruder (for example, an adhesive containing a polar functional group-containing resin) to form a layer that becomes the adhesive layer 25. Further, the resin cord member 26 in which the outer periphery of the metal member 27 is covered with the covering resin layer 28 via the adhesive layer 25 is formed by covering the upper surface with a resin (polyester thermoplastic elastomer) extruded from the extruder. To do. Then, the obtained resin cord member 26 is wound around a reel 58.

[Resin cord member winding process]
Next, the resin cord member winding step will be described with reference to FIG. FIG. 3 is an explanatory diagram for explaining an operation of installing the resin cord member on the crown portion of the tire frame body using the resin cord member heating device and the rollers. In FIG. 3, the resin cord member supply device 56 includes a reel 58 around which the resin cord member 26 is wound, a resin cord member heating device 59 disposed downstream of the reel 58 in the cord conveyance direction, and conveyance of the resin cord member 26. A first roller 60 disposed on the downstream side in the direction, a first cylinder device 62 that moves the first roller 60 in a direction of moving toward and away from the tire outer peripheral surface, and a resin cord member of the first roller 60 26, a second roller 64 disposed on the downstream side in the conveying direction, and a second cylinder device 66 that moves the second roller 64 in a direction in which the second roller 64 comes in contact with and separates from the tire outer peripheral surface. The second roller 64 can be used as a metal cooling roller. Further, the surface of the first roller 60 or the second roller 64 is coated with a fluororesin (in this embodiment, Teflon (registered trademark)) in order to suppress adhesion of a molten or softened resin material. . As described above, the heated resin cord member is firmly integrated with the case resin of the tire frame.

  The resin cord member heating device 59 includes a heater 70 and a fan 72 that generate hot air. The resin cord member heating device 59 includes a heating box 74 through which the hot air is supplied and the resin cord member 26 passes through the internal space, and a discharge port 76 that discharges the heated resin cord member 26. Yes.

  In this step, first, the temperature of the heater 70 of the resin cord member heating device 59 is raised, and the ambient air heated by the heater 70 is sent to the heating box 74 by the wind generated by the rotation of the fan 72. Next, the resin cord member 26 unwound from the reel 58 is sent into a heating box 74 in which the internal space is heated with hot air, and heated (for example, the temperature of the resin cord member 26 is heated to about 100 ° C. to 250 ° C.). To do. The heated resin cord member 26 is spirally wound around the outer peripheral surface of the crown portion 16 of the tire frame body 17 rotating in the direction of arrow R in FIG. Here, when the coated resin layer of the heated resin cord member 26 comes into contact with the outer peripheral surface of the crown portion 16, the resin material at the contact portion melts or softens and melts and joins with the resin of the tire skeleton to bond the crown portion 16. It is integrated with the outer peripheral surface. At this time, since the resin cord member is melt-bonded to the adjacent resin cord member, the resin cord member is wound without a gap. Thereby, the air entering to the portion where the resin cord member 26 is embedded is suppressed.

  The embedding depth L of the resin cord member 26 can be adjusted by the heating temperature of the resin cord member 26, the tension applied to the resin cord member 26, the pressing force by the first roller 60, and the like. In an embodiment, the embedding depth L of the resin cord member 26 is set to be 1/5 or more of the diameter D of the resin cord member 26.

  Next, a belt-like tread 30 is wound around the outer peripheral surface of the tire frame body 17 in which the resin cord member 26 is embedded, and this is accommodated in a vulcanizing can or a mold and heated (vulcanized). The tread 30 may be unvulcanized rubber or vulcanized rubber.

  And if the sealing layer 24 which consists of vulcanized rubber is adhere | attached on the bead part 12 of the tire frame | skeleton body 17 using an adhesive agent etc., the tire 10 will be completed.

  In the method for manufacturing a tire according to the first embodiment of the present invention, the bonding portion of the tire frame half body 17A is heated using a bonding mold, but the present invention is not limited to this, and for example, provided separately. The tire frame half body 17A may be joined by heating the joining portion with a high-frequency heater or the like, softening or melting in advance by hot air or infrared irradiation, and pressurizing with a joining mold.

  In the tire manufacturing method according to the first embodiment of the present invention, the resin cord member supply device 56 has two rollers, a first roller 60 and a second roller 64, but the present invention is not limited to this. The present invention is not limited to this, and only one of the rollers (that is, one roller) may be provided.

In the method for manufacturing a tire according to the first embodiment of the present invention, the resin cord member 26 is heated, and the surface of the tire skeleton body 17 at the portion where the heated resin cord member 26 contacts is melted or softened. The present invention is not limited to this embodiment, and the resin cord member 26 is heated after the outer peripheral surface of the crown portion 16 in which the resin cord member 26 is embedded using a hot air generator without heating the resin cord member 26. It may be embedded in the crown portion 16.
In the tire manufacturing method according to the first embodiment of the present invention, the heat source of the resin cord member heating device 59 is a heater and a fan. However, the present invention is not limited to this embodiment, and the resin cord member It is good also as an aspect which heats 26 directly with radiant heat (for example, infrared rays etc.).

Furthermore, in the tire manufacturing method according to the first embodiment of the present invention, the portion where the thermoplastic resin material in which the resin cord member 26 is embedded is melted or softened is forcibly forced by the second metal roller 64. However, the present invention is not limited to this embodiment, and cold air is blown directly onto a portion where the thermoplastic resin material is melted or softened to forcibly apply the melted or softened portion of the thermoplastic resin material. It is good also as an aspect which cools and solidifies.
Although it is easy to manufacture the resin cord member 26 spirally, a method of disposing the resin cord member 26 discontinuously in the width direction is also conceivable.

  In the tire manufacturing method according to the first embodiment of the present invention, the belt-shaped tread 30 is wound around the outer peripheral surface of the tire frame body 17 in which the resin cord member 26 is embedded, and then heated (vulcanized). However, the present invention is not limited to this embodiment, and a vulcanized belt-like tread may be bonded to the outer peripheral surface of the tire skeleton 17 with an adhesive or the like. Examples of the vulcanized belt-like tread include precure treads used for retreaded tires.

  The tire 10 according to the first embodiment of the present invention is a so-called tubeless tire in which an air chamber is formed between the tire 10 and the rim 20 by attaching the bead portion 12 to the rim 20. It is not limited to this aspect, A perfect tube shape may be sufficient.

  The present invention has been described with reference to the embodiments. However, these embodiments are merely examples, and the present invention can be implemented with various modifications without departing from the scope of the present invention. It goes without saying that the scope of rights of the present invention is not limited to these embodiments.

  EXAMPLES The present invention will be specifically described below with reference to examples, but the present invention is not limited to these descriptions. Unless otherwise specified, “part” represents a mass standard.

[Examples and Comparative Examples]
<Plating treatment>
First, the metal cords shown in Tables 1 to 6 were plated with the metal compositions shown in Tables 1 to 6.
First, the metal cord used as the core wire of a plating strand was each immersed in the copper plating bath and the zinc plating bath so that it might become a metal composition shown in Tables 1-6. Next, copper and zinc were uniformly diffused over the entire plating layer by applying a thermal diffusion treatment (set to conditions of 500 ° C. to 650 ° C. and 5 seconds to 25 seconds). Next, the metal cord subjected to thermal diffusion treatment was subjected to wire drawing to form a plated metal cord having a predetermined wire diameter and plating thickness.
The plating thickness was 0.1 to 0.5 μm.

<Production of resin-metal composite member>
In accordance with the resin cord member molding step in the tire manufacturing method of the first embodiment described above, the adhesive layer shown in Tables 1 to 6 is attached to the metal cord that has been subjected to the plating treatment to form an adhesive layer. Formed.

  Next, the coating resin (polyester-based thermoplastic elastomer (manufactured by Toray DuPont, “Hytrel 5557”, melting point 207 ° C.) or polyamide extruded on the outer periphery of the layer serving as an adhesive layer by an extruder) A thermoplastic elastomer (“UBESTA XPA9055X1”, melting point 165 ° C., manufactured by Ube Industries, Ltd.) was attached, coated, and cooled.The extrusion conditions were a metal member temperature of 200 ° C. and a coating resin temperature of 240 ° C. As described above, a resin-metal composite member having a structure in which the outer periphery of the metal cord was coated with the coating resin layer via the adhesive layer was produced. Tables 1 to 6 show the average thickness of the adhesive layer and the average thickness of the coating resin layer.

<Production of tire having resin-metal composite member as reinforcing belt member>
According to the tire manufacturing method in the first embodiment described above, a polyester-based thermoplastic elastomer (manufactured by Toray DuPont, “Hytrel 5557”, melting point 207 ° C.) or a polyamide-based thermoplastic elastomer (manufactured by Ube Industries, “UBESTA XPA9055X1” A melting point of 165 ° C.) was used to prepare a tire skeleton formed of a resin material (using the same material as the thermoplastic elastomer used for the coating resin layer).
Subsequently, using the obtained resin-metal composite member and tire skeleton, a raw tire in which the resin-metal composite member is wound around the crown portion of the tire skeleton and disposed on the unvulcanized tread rubber Was made. The resin-metal composite member was placed on the tire frame so that the average distance between the metal members of adjacent resin-metal composite members was 1000 μm. The tire size was 245/35 R18. The thickness of the tread rubber was 10 mm.
The produced raw tire was heated (vulcanized tread rubber) at 170 ° C. for 18 minutes.

<Initial adhesion test>
Plating was formed on a steel plate having a width of 20 mm under the same formation conditions as in the above <Plating treatment>. Further, an adhesive layer is formed on the steel plate on which the plating has been formed under the same formation conditions as the formation of the adhesive layer described in <Preparation of resin-metal composite member>, and a metal plate-adhesive bonding test A piece was prepared.
Using this specimen, a 180 ° peel test was performed at a tensile speed of 100 mm / min in a room temperature environment (25 ° C.) using “TENSIRON RTF-1210” manufactured by A & D Co., Ltd. (Unit: N / 20 mm) was measured, and adhesion was evaluated according to the following evaluation criteria.
(Evaluation criteria)
A: The peeling force is 30 N / 20 mm or more.
B: Peeling force is 20 N / 20 mm or more and less than 30 N / 20 mm.
C: The peeling force is less than 20 N / 20 mm.

<Peeling strength test after wet heat degradation>
The metal plate-adhesive bonded test piece was subjected to a wet heat deterioration treatment for 24 hours under the conditions of a temperature of 70 ° C. and 95% RH.
A peel test was performed on the test piece after the wet heat deterioration treatment in the same manner as in the initial adhesion test, the peel force (unit: N / 20 mm) was measured, and the adhesion was evaluated according to the same evaluation criteria.

<Belt bending fatigue test>
First, a test sample of a belt bending fatigue tester was prepared. A sample was prepared by coating one cord (SC) with an adhesive layer and a coating resin layer, and coating with a thickness of 2.1 mm, a width of 2.5 mm, and a length of 500 mm.
Using this test sample, using a belt bending fatigue tester manufactured by Takachiho Seiki Co., Ltd. as a measuring device, hanging the test sample (resin-coated SC) on the shaft in a U-shape and applying a load to both ends of the test sample It was bent up and down 40,000 times. Test conditions include a shaft of 62 mm, a bending speed of 125 cpm (cycle per minute, 2 Hz), a load of 55.5 N, presence or absence of SC fracture, and peeling force before and after the test (peeling measured in the initial adhesion test). Force) was evaluated according to the following evaluation criteria.
(Evaluation criteria)
A: SC does not break and peel strength decreases less than 20% B: SC does not break and peel force decreases from 20% to less than 50% C: SC fracture, peel force decreases by 50% or more from the beginning (SC break is at least a monofilament (One of them is broken by kink or shear input)

<Tire running (JIS drum test)>
The tires produced in the examples and comparative examples were adjusted to an internal pressure of 3.0 kg / cm ² in a room at 25 ± 2 ° C. and then left for 24 hours. Thereafter, the air pressure was readjusted, a load twice as large as the JIS load was applied to the tire, and a maximum of 20,000 km was run on a drum having a diameter of about 3 m at a speed of 60 km / h.
Then, the distance traveled until the tire broke down was measured and evaluated according to the following evaluation criteria. The longer the travel distance, the better the durability of the tire, and it can be said that it is practically preferable if it is classified as [A] or [B]. The results are shown in Tables 1-6.
(Evaluation criteria)
A: Completed 20,000 km.
B: The travel distance until the failure occurred was 10,000 km or more and less than 20,000 km.
C: The travel distance until the failure occurred was less than 10,000 km.

The unit of the composition shown in the table is “part” unless otherwise specified.
The components in the table are as follows.
(Metal cord)
・ "1 + 5 SC": Twisted strands of 7 multifilaments with an average diameter of φ1.15 mm (φ0.35 mm monofilament (steel, strength: 280 N, elongation: 3%) ・ “3 + 8 SC”: average diameter φ0.90mm multifilament (φ0.20mm monofilament (steel, strength: 120N, elongation: 3%), stranded wire twisted 11 strands; “1 + 0 SC (monofilament)”: monofilament with average diameter φ1.25mm (Steel, strong: 2700N, elongation: 7%)

(Adhesive layer)
Olefin-based thermoplastic elastomer: manufactured by Mitsui Chemicals, maleic anhydride-modified olefin-based thermoplastic elastomer, “Admer QE060”, melting point 140 ° C.
Polyester thermoplastic elastomer: manufactured by Mitsubishi Chemical Corporation, maleic anhydride modified polyester thermoplastic elastomer, “Primalloy-AP GQ730”, melting point 204 ° C.
PP: manufactured by Prime Polymer, unmodified polypropylene resin, “J-700GP”, melting point: 163 ° C.
-TPC: manufactured by Toray DuPont, polyester thermoplastic elastomer, "Hytrel 5557", melting point 207 ° C
Rubber adhesive: 100 parts of natural rubber, 60 parts of carbon black [manufactured by Tokai Carbon Co., Ltd., N330], 8 parts of zinc oxide, vulcanization accelerator N, N′-dicyclohexyl-2-benzothiazolylsulfene Amide [manufactured by Ouchi Shinsei Chemical Co., Ltd., trade name: Noxeller DZ] 1 part, anti-aging agent N- (1,3-dimethylbutyl) -N′-phenyl-p-phenylenediamine [Ouchi Shinsei Chemical Industry Co., Ltd., trade name: NOCRACK 6C] rubber adhesive prepared by blending 2 parts and 5 parts sulfur and vulcanizing at 145 ° C. for 180 minutes

(Coating resin layer)
・ Polyester thermoplastic elastomer: "Hytrel 5557" manufactured by Toray DuPont, melting point 207 ° C
Polyamide thermoplastic elastomer: “UBESTA XPA9055X1” manufactured by Ube Industries, melting point 165 ° C.

  As can be seen from the evaluation results shown in Tables 1 to 6, the adhesive layer includes a polar functional group-containing resin, and the metal member is any one of copper plating, zinc plating, and copper-zinc plating. In this example using a resin-metal composite member in which the surface is formed by plating and the copper content in plating is 0% or 55% or more and 100% or less, compared to the comparative example, adhesion durability and wet heat durability It turns out that both are excellent.

10 tires, 12 bead parts, 16 crown parts (peripheral parts), 17 tire frame bodies, 18 bead cores, 20 rims, 21 bead sheets, 22 rim flanges, 24 seal layers, 25 adhesive layers, 26 resin cord members, 27 metal members , 28 Coating resin layer, 30 tread, D metal member diameter, L metal member embedment depth

Claims (9)

A resin-metal composite member for a tire having a metal member, an adhesive layer, and a covering resin layer in this order,
The adhesive layer includes at least one polar functional group-containing resin selected from the group consisting of a thermoplastic resin having a polar functional group and a thermoplastic elastomer having a polar functional group;
The metal member has a surface formed by any one of copper plating, zinc plating, and copper-zinc plating, and the copper content in the plating is 0% or 55% to 100%. ,
Resin metal composite member for tires.   2. The resin-metal composite member for tire according to claim 1, wherein a copper content in the plating is 80% or more and 100% or less.   The resin-metal composite member for tire according to claim 1 or 2, wherein the metal member is a single wire or a stranded wire.   The said polar functional group containing resin has at least 1 type of group selected from the group which consists of an epoxy group, a carboxy group, its anhydride group, and an amino group as said polar functional group. The resin-metal composite member for tires according to 1.   The adhesive layer includes, as the polar functional group-containing resin, a polyester-based thermoplastic resin, an olefin-based thermoplastic resin, a polystyrene-based thermoplastic resin, a polyester-based thermoplastic elastomer, a polyolefin-based thermoplastic elastomer, and a polystyrene-based thermoplastic elastomer. The resin-metal composite member for tire according to any one of claims 1 to 4, comprising at least one selected from the group consisting of:   The resin-metal composite member for a tire according to any one of claims 1 to 5, comprising the polar functional group-containing resin in an amount of 50% by mass or more based on the entire adhesive layer. An annular tire skeleton containing an elastic material;
The resin-metal composite member for tire according to any one of claims 1 to 6,
Tire with.   The tire according to claim 7, wherein the tire resin-metal composite member constitutes a reinforcing belt member wound in a circumferential direction on an outer peripheral portion of the tire frame body.   The tire according to claim 7, wherein the resin-metal composite member for tire constitutes a bead member.