JP3055111B2 - Thermoplastic elastomer laminate - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermoplastic elastomer laminate, and more particularly, to a thermoplastic elastomer laminate effective for applications such as automotive interior materials and sealing materials.

[0002]

BACKGROUND OF THE INVENTION Conventionally, glass run channels, which are one of the important sealing materials used in automobiles, include (1)
A composite material comprising a vulcanized rubber mainly composed of an ethylene-propylene-diene copolymer rubber excellent in weather resistance and heat resistance, an adhesive and a nylon fiber, (2) the vulcanized rubber and abrasion resistance Composite material consisting of an adhesive with excellent properties,
(3) Soft polyvinyl chloride for profile extrusion molding is used.

The above-mentioned composite materials (1) and (2) are based on a vulcanized ethylene / propylene / diene copolymer rubber having excellent weather resistance and heat resistance.
Excellent heat resistance and dimensional stability. However,
The manufacturing process of these composite materials is ethylene, propylene,
It consists of a kneading process of a diene copolymer rubber and a filler, an extrusion molding process, a surface buffing process, an adhesive application process, a drying process and a fiber flocking process, and is very complicated. On the other hand, since the above-mentioned composite material (3) is manufactured by extrusion molding of soft polyvinyl chloride, the manufacturing process is simplified. However, this composite material has poor heat resistance and dimensional stability, and is inferior in practical performance as compared with the above-mentioned composite materials (1) and (2).

Therefore, it is excellent in weather resistance, heat resistance and dimensional stability, and can be manufactured by a simplified manufacturing process.
There has been a demand for a laminate that can be used effectively for applications such as automotive interior materials and sealing materials.

[0005]

SUMMARY OF THE INVENTION The object of the present invention is to solve the problems associated with the prior art as described above, and to provide an excellent weather resistance, heat resistance and dimensional stability and a simplified manufacturing process. An object of the present invention is to provide a thermoplastic elastomer laminate that can be manufactured and is excellent in so-called economic efficiency.

[0006]

Thermoplastic elastomer laminate according to the present invention SUMMARY OF THE INVENTION, a layer comprising the formed thermoplastic elastomer and a crystalline polyolefin and a rubber (A), 135 ° C. dec
The intrinsic viscosity [η] measured in a phosphorus solvent is 10 to 40 dl /
g of ultra-high molecular weight polyolefin in the range of 135 g
The intrinsic viscosity [η] measured in decalin solvent is 0.1 to 5
low to high molecular weight polio in the range of dl / g
A polyolefin composition substantially consisting of
The ultra-high molecular weight polyolefin is
Of olefins with low or high molecular weight polyolefins
15 to 40% by weight based on the total weight of 100% by weight
And a layer comprising the ultrahigh molecular weight polyolefin composition (B) that is present. Ma
Further, the thermoplastic elastomer (A) is a crystalline polyp.
Propylene (a) 60 to 10 parts by weight, ethylene propylene
Rene copolymer rubber or ethylene propylene diene
40 to 90 parts by weight of rubber (b) made of copolymer rubber
The total amount of the components (a) and (b) is 100 parts by weight.
In the presence of an organic peroxide
The rubber (b) obtained by dynamic heat treatment is partially
Preferably, it is crosslinked. The mixture is
Furthermore, ethylene-propylene copolymer rubber or ethylene
Rubber consisting of propylene / propylene / diene copolymer rubber
Rubber (c) and / or mineral oil softener other than (b)
(D) preferably 5 to 100 parts by weight
No.

[0007]

DETAILED DESCRIPTION OF THE INVENTION Hereinafter, the thermoplastic elastomer laminate according to the present invention will be specifically described. The thermoplastic elastomer laminate according to the present invention comprises a layer comprising a thermoplastic elastomer (A) and an ultrahigh molecular weight polyolefin composition.
It is composed of a layer comprising the object (B).

Thermoplastic Elastomer (A) The thermoplastic elastomer (A) used in the present invention comprises a crystalline polyolefin and a rubber.

The crystalline polyolefin used in the present invention includes a homopolymer or a copolymer of an α-olefin having 2 to 20 carbon atoms. Specific examples of the crystalline polyolefin include the following (co) polymers. (1) Ethylene homopolymer (manufacturing method may be either low-pressure method or high-pressure method) (2) Co-polymerization of ethylene with 10 mol% or less of other α-olefin or vinyl monomer such as vinyl acetate, ethyl acrylate Polymer (3) Propylene homopolymer (4) Random copolymer of propylene and 10% or less of other α-olefin (5) Block copolymer of propylene and 30% or less of other α-olefin (6) 1-butene homopolymer (7) Random copolymer of 1-butene and 10% by mole or less of other α-olefin (8) 4-methyl-1-pentene homopolymer (9) 4 -Methyl-1-pentene and less than 20 mol% of other α
-Random copolymer with olefin As the α-olefin, specifically, ethylene, propylene, 1-butene, 4-methyl-1-pentene, 1-
Hexene, 1-octene and the like.

[0010] The rubber used in the present invention is not particularly limited, but an olefin copolymer rubber is preferred. The olefin-based copolymer rubber has 2 to 20 carbon atoms.
Amorphous random elastic copolymer containing α-olefin as a main component, which is an amorphous α-olefin copolymer composed of two or more α-olefins and non-conjugated with two or more α-olefins Α-olefin / non-conjugated diene copolymer comprising diene.

Specific examples of such an olefin copolymer rubber include the following rubbers. (1) Ethylene / α-olefin copolymer rubber [ethylene / α-olefin (molar ratio) = about 90/10
50/50] (2) Ethylene / α-olefin / non-conjugated diene copolymer rubber [Ethylene / α-olefin (molar ratio) = about 90/10
５０50/50] (3) Propylene / α-olefin copolymer rubber [propylene / α-olefin (molar ratio) = about 90/1
0-50 / 50] (4) Butene / α-olefin copolymer rubber [butene / α-olefin (molar ratio) = about 90/10
50/50] Specific examples of the α-olefin include the same α-olefins as the specific examples of the α-olefin constituting the crystalline polyolefin described above. As the non-conjugated diene, specifically, dicyclopentadiene,
Examples include 1,4-hexadiene, cyclooctadiene, methylene norbornene, and ethylidene norbornene.

The Mooney viscosity ML of these copolymer rubbers
_{1 + 4} (100 ° C.) is from 10 to 250, especially from 40 to 150
Is preferred. The iodine value when the non-conjugated diene is copolymerized is preferably 25 or less.

The above-mentioned olefin-based copolymer rubber can exist in the thermoplastic elastomer in all cross-linked states such as uncross-linked, partially cross-linked, and totally cross-linked. Preferably it is present.

The rubber used in the present invention includes:
In addition to the above olefin copolymer rubber, other rubber,
For example, styrene-butadiene rubber (SBR), nitrile rubber (NBR), natural rubber (NR), butyl rubber (I
IR) and the like, diene rubbers, SEBS, polyisobutylene and the like.

In the thermoplastic elastomer used in the present invention, the weight ratio of the crystalline polyolefin to the rubber (crystalline polyolefin / rubber) is from 90/10 to 10
/ 90, preferably in the range of 70/30 to 20/80.

When an olefin copolymer rubber and another rubber are used in combination as the rubber, the other rubber has a total amount of crystalline polyolefin and rubber of 1%.
40 parts by weight or less, preferably 5 to 100 parts by weight
It is blended at a ratio of 20 parts by weight.

The thermoplastic elastomer preferably used in the present invention comprises crystalline polypropylene, ethylene-α-
It consists of an olefin copolymer rubber or an ethylene / α-olefin / non-conjugated diene copolymer rubber, exists in a thermoplastic elastomer in a partially cross-linked state, and has a weight blend of crystalline polypropylene and rubber. The ratio (crystalline polypropylene / rubber) is 70 / 30-2
It is a thermoplastic elastomer in the range of 0/80.

If necessary, additives such as a mineral oil-based softener, a heat stabilizer, an antistatic agent, a weather stabilizer, an antioxidant, a filler, a coloring agent, and a lubricant are added to the thermoplastic elastomer. Can be blended within a range that does not impair the object of the present invention.

More specific examples of the thermoplastic elastomer preferably used in the present invention include crystalline polypropylene (a) in an amount of 60 to 10 parts by weight, ethylene-propylene copolymer rubber or ethylene-propylene-diene copolymer. 40 to 90 parts by weight of rubber (b) made of rubber [total amount of components (a) and (b) is 100 parts by weight]
And a rubber (c) other than the rubber (b) and / or 5-100 parts by weight of a mineral oil-based softener (d), which is dynamically heat-treated in the presence of an organic peroxide to obtain a mixture. A thermoplastic elastomer obtained by partially cross-linking the rubber (b) is exemplified.

As the above organic peroxide, specifically, dicumyl peroxide, di-tert-butyl peroxide, 2,5-dimethyl-2,5-di- (tert-butylperoxy)
Hexane, 2,5-dimethyl-2,5-di- (tert-butylperoxy) hexyne-3, 1,3-bis (tert-butylperoxyisopropyl) benzene, 1,1-bis (tert-butylperoxy)- 3,3,5-trimethylcyclohexane, n-butyl
-4,4-bis (tert-butylperoxy) valerate, benzoyl peroxide, p-chlorobenzoyl peroxide, 2,4-dichlorobenzoyl peroxide, tert-butylperoxybenzoate, tert-butylperbenzoate, tert-butylperoxyisopropyl carbonate, Diacetyl peroxide, lauroyl peroxide, tert-butylcumyl peroxide and the like.

Among these, 2,5-dimethyl-2,5-di- (tert-butylperoxy) hexane and 2,5-dimethyl-2,5-di-, in terms of odor and scorch stability. (Tert-butylperoxy) hexyne-3,1,3-bis (tert-butylperoxyisopropyl) benzene, 1,1-bis (tert-butylperoxy) -3,3,5-trimethylcyclohexane, n-butyl-4 1,4-Bis (tert-butylperoxy) valerate is preferred, and 1,3-bis (tert-butylperoxyisopropyl) benzene is most preferred.

In the present invention, the organic peroxide is
It is used in an amount of 0.05 to 3% by weight, preferably 0.1 to 1% by weight, based on 100% by weight of the total amount of the crystalline polyolefin and the rubber.

In the present invention, sulfur, p-quinonedioxime, p, p'-dibenzoylquinonedioxime, N-methyl-N
-4- dinitrosoaniline, nitrosobenzene, diphenylguanidine, peroxy crosslinking aids such as trimethylolpropane-N, N'-m-phenylenedimaleimide, or divinylbenzene, triallyl cyanurate, ethylene glycol dimethacrylate, Polyfunctional methacrylate monomers such as diethylene glycol dimethacrylate, polyethylene glycol dimethacrylate, trimethylolpropane trimethacrylate, allyl methacrylate, and polyfunctional vinyl monomers such as vinyl butyrate and vinyl stearate can be blended.

By using a compound as described above,
A uniform and mild crosslinking reaction can be expected. Particularly, in the present invention, divinylbenzene is most preferred. Divinylbenzene is easy to handle, has good compatibility with the crystalline polyolefin and rubber, which are the main components of the above-mentioned crosslinked product, and has an action of solubilizing the organic peroxide. Therefore, a thermoplastic elastomer having a uniform cross-linking effect by heat treatment and a good balance between fluidity and physical properties can be obtained. In the present invention, the crosslinking aid or the polyfunctional vinyl monomer as described above is used in an amount of 0.1 to 0.1% based on the whole to-be-crosslinked product.
It is preferably used at a ratio of from 2 to 2% by weight, especially from 0.3 to 1% by weight. If the compounding ratio of the crosslinking aid or the polyfunctional vinyl monomer exceeds 2% by weight, the crosslinking reaction proceeds too quickly if the compounding amount of the organic peroxide is large, so that the obtained thermoplastic elastomer has poor fluidity. Inferior,
On the other hand, when the compounding amount of the organic peroxide is small, the crosslinking aid and the polyfunctional vinyl monomer remain as unreacted monomers in the thermoplastic elastomer, and the thermoplastic elastomer depends on the heat history during processing and molding. Or changes in physical properties. Therefore, the co-agent and the polyfunctional vinyl monomer should not be compounded in excess.

The term "dynamically heat-treating" refers to kneading the above components in a molten state. As the kneading device, a conventionally known kneading device, for example, an open-type mixing roll, a non-open-type Banbury mixer, an extruder, a kneader, a continuous mixer, or the like is used. Of these, a non-open type kneading apparatus is preferable, and kneading is preferably performed in an atmosphere of an inert gas such as nitrogen gas or carbon dioxide gas.

The kneading is preferably carried out at a temperature at which the half-life of the organic peroxide used is less than 1 minute.
The kneading temperature is usually 150 to 280 ° C, preferably 17 to 280 ° C.
The temperature is 0 to 240 ° C, and the kneading time is 1 to 20 minutes, preferably 3 to 10 minutes. The applied shearing force is usually determined in the range of 10 to 10 ⁴ sec ^-1 , preferably 10 ² to 10 ³ sec ^-1 .

The preferred thermoplastic elastomer used in the present invention is partially crosslinked, and the term "partially crosslinked" refers to a gel having a gel content of 20 to 98% as measured by the following method. In the present invention, the gel content is preferably in the range of 45 to 98%.

[Measurement Method of Gel Content] About 100 mg of a thermoplastic elastomer pellet is weighed as a sample, and 30 ml which is a sufficient amount for the pellet is placed in a closed container.
In cyclohexane at 23 ° C. for 48 hours.

Next, the sample is taken out on a filter paper and dried at room temperature for at least 72 hours until the weight becomes constant. The gel content is represented by the following equation. Gel content [%] = (dry weight after cyclohexane immersion)
÷ (weight before immersion in cyclohexane) × 100 The thermoplastic elastomer (A) constituting one layer of the thermoplastic elastomer laminate according to the present invention is composed of a crystalline polyolefin and rubber, and thus has excellent fluidity.

Ultrahigh molecular weight polyolefin composition (B) Ultrahigh molecular weight polyolefin preferably used in the present invention
Specific examples of the composition (B) include the following ultrahigh molecular weight polyolefin compositions .

(1) An ultrahigh molecular weight polyolefin having an intrinsic viscosity [η] measured in a decalin solvent at 135 ° C. within a range of 10 to 40 dl / g, and an intrinsic viscosity [η] measured in a decalin solvent at 135 ° C. A polyolefin composition consisting essentially of a low molecular weight to high molecular weight polyolefin in the range of 0.1 to 5 dl / g, wherein the ultrahigh molecular weight polyolefin is composed of an ultrahigh molecular weight polyolefin and a low molecular weight to high molecular weight polyolefin. An ultrahigh molecular weight polyolefin composition present in a proportion of 15 to 40% by weight relative to 100% by weight of the total.

(2) A composition comprising the ultrahigh molecular weight polyolefin composition of (1) and 1 to 20% by weight of a liquid or solid lubricant based on the ultrahigh molecular weight polyolefin composition.

The ultrahigh molecular weight polyolefin and the low molecular weight to high molecular weight polyolefin described above include, for example, ethylene, propylene, 1-butene, 1-pentene, 1-hexene, 1-octene, 1-decene, 1-dodecene, -Methyl
It is composed of a homopolymer or copolymer of α-olefin such as -1-pentene and 3-methyl-1-pentene. In the present invention, ethylene homopolymer, and ethylene and other α
-Ethylene-based copolymers composed of olefins are preferred.

As the liquid lubricating oil used in the composition (2) , petroleum-based lubricating oil, synthetic lubricating oil and the like are used. Specific examples of the petroleum-based lubricating oil include liquid paraffin, spindle oil, refrigerating machine oil, dynamo oil, turbine oil, machine oil, cylinder oil, and the like.

Specific examples of the synthetic lubricating oil include synthetic hydrocarbon oil, polyglycol oil, polyphenyl ether oil, ester oil, phosphate ester oil, polychlorotrifluoroethylene oil, fluoroester oil, and chlorinated biphenyl. Oil, silicone oil and the like are used.

As the solid lubricating oil used in the composition (2) , graphite and molybdenum disulfide are mainly used, but in addition, boron nitride, tungsten disulfide and lead oxide , Glass powder, metal soap, etc. can also be used. The solid lubricating oil can be used alone or in combination with a liquid lubricating oil. For example, the solid lubricating oil can be blended with the ultrahigh molecular weight polyolefin in the form of a powder, a sol, a gel, a suspensoid or the like.

The above ultrahigh molecular weight polyolefin composition may optionally contain a mineral oil-based softener, a heat stabilizer, an antistatic agent, a weather stabilizer, an antioxidant, a filler, a coloring agent, a lubricant and the like. Additives can be incorporated within a range that does not impair the purpose of the present invention.

Thermoplastic Elastomer Laminate The thermoplastic elastomer laminate according to the present invention comprises a layer composed of the thermoplastic elastomer (A) as described above and a layer composed of the ultrahigh molecular weight polyolefin composition (B). You. The thermoplastic elastomer laminate according to the present invention can be obtained by laminating the above two layers.

[0039] Thermoplastic elastomer (A) layer [hereinafter
(A) layer) and ultra-high molecular weight polyolefinComposition
The method of laminating the layer (B) [hereinafter abbreviated as (B) layer] is the final method.
Depends on product shape, size and required physical properties, especially limited
No, for example, the following lamination method
You.

(1) A method of thermally fusing the previously formed layers (A) and (B) at a temperature higher than the temperature at which at least one of the layers is melted, using a calender roll forming machine, a compression molding machine, or the like. .

[0041] (2) advance either is sheet forming (A) layer or (B) layer extruded, a method of thermal fusion to the other layer that has a calendar molding. (3) A method of simultaneously extruding the layers (A) and (B) with a multilayer extruder and heat-sealing the layers.

In the present invention, the thickness of the layer (A) is 0.1.
1 to 50 mm, and the thickness of the (B) layer is 5 μm to 10 m.
m is generally preferred. In the thermoplastic elastomer laminate according to the present invention, the layer made of the thermoplastic elastomer (A) includes a crystalline polyolefin,
Since it is made of rubber, it has excellent heat resistance, heat aging resistance and rubber elasticity.

Further, in the thermoplastic elastomer laminate according to the present invention, the above-mentioned ultrahigh molecular weight polyolefin composition
The layer made of the object (B) is excellent in abrasion resistance, scratch resistance, slidability and chemical resistance.

[0044]

The thermoplastic elastomer laminate according to the present invention has remarkably excellent interlayer adhesion between the thermoplastic elastomer (A) layer and the ultrahigh molecular weight polyolefin composition (B) layer. Further, the thermoplastic elastomer laminate according to the present invention is lighter in weight than a conventional composite material composed of vulcanized rubber and nylon fibers, or soft polyvinyl chloride, and has a sticky surface due to oozing out of a plasticizer and the like. Moreover, it is excellent in mechanical strength, heat resistance, heat aging resistance, weather resistance, abrasion resistance, scratch resistance, slidability and dimensional stability.

Therefore, the thermoplastic elastomer laminate according to the present invention can be used not only for automotive interior materials and sealing materials, but also for furniture, building materials, home appliance housings, bags, suitcases, sporting goods, office supplies, miscellaneous goods and the like. It can be used effectively for applications.

Hereinafter, the present invention will be described with reference to Examples.
The present invention is not limited to these examples.

[0047]

Example 1 Ethylene content 70 mol%, iodine value 1
2. 80 parts by weight of an ethylene / propylene / ethylidene norbornene copolymer rubber (hereinafter abbreviated as EPDM (1)) having a Mooney viscosity of ML _{1 + 4} (100 ° C.) 120 and MFR
(ASTM D 1238-65T, 230 ° C) 13,
Polypropylene having a density of 0.91 g / cm ³ [hereinafter referred to as PP
(1) is kneaded with a Banbury mixer at 180 ° C. for 5 minutes in a nitrogen atmosphere using a Banbury mixer.
The kneaded material was passed through a roll to form a sheet, which was formed into square pellets by a sheet cutter.

Next, this square pellet and 1,3-bis (t
0.3 parts by weight of tert-butylperoxyisopropyl) benzene [hereinafter abbreviated as peroxide (A)] and 0.5 part by weight of divinylbenzene [hereinafter abbreviated as DVB] were stirred and mixed with a Henschel mixer.

Next, the mixture was extruded at 220 ° C. in a nitrogen atmosphere using a single screw extruder having an L / D of 30 and a screw diameter of 50 mm to obtain a thermoplastic elastomer (a).

Then, the gel content of the copolymer rubber in the obtained thermoplastic elastomer (a) was measured by the above method. Table 1 shows the results. Further, the obtained thermoplastic elastomer (a) was compression-molded at 190 ° C. to prepare a sheet for measuring physical properties, and tested for tensile stress at break (T _B ), flexibility and moldability according to the following methods. Table 1 shows the results.

[Test method] (1) Tensile strength at break (T _B ) According to JIS K 6301, the tensile strength at break (T _B : unit kgf / cm ² ) at a tensile speed of 200 mm / min. It was measured.

(2) Flexibility The torsional rigidity (unit kgf / cm ² ) was determined in accordance with ASTM D1043, and the flexibility was evaluated based on the torsional rigidity.

(3) Moldability Melt flow rate (MFR: unit g / 10 min, 230 ° C., 2.16) according to ASTM D1238
kg), and the moldability was evaluated based on the melt flow rate.

Next, the obtained thermoplastic elastomer (a) was subjected to full flight, L / D = 2 using a 50 mm diameter T-die extruder manufactured by Toshiba Machine Co., Ltd.
8. Extrusion temperature 240 ° C, T die is coat hanger die,
Extruded into a sheet at a take-up speed of 2.5 m / min,
Next, the extruded sheet-shaped thermoplastic elastomer (a) in a molten state was converted to an ultra-high molecular weight polyolefin film [Sukishin Kogyo Co., Ltd., skive film, 0.1 m
m thickness], and passed between a pair of rolls to obtain a laminate in which the thickness of the thermoplastic elastomer (a) layer was 1.0 mm and the thickness of the ultrahigh molecular weight polyolefin layer was 0.1 mm. However, the thermoplastic elastomer (a) was passed through a roll at a roll temperature of 60 ° C., and the ultrahigh molecular weight polyolefin film was passed through a roll at a room temperature.

For the obtained laminate, the interlayer adhesive strength was measured according to the following method. Table 1 shows the results. [Interlayer adhesive strength test] Test method: 180 degree peeling Test piece: width 25 mm, length 100 mm Peeling speed: 25 mm / min Interlayer adhesive strength: value obtained by dividing the peeling load by the width of the test piece (unit: kgf / cm)

[0056]

Example 2 Example 1 was repeated except that peroxide (A) and DVB were not used.

Table 1 shows the results.

[0058]

Example 3 In Example 1, when producing a thermoplastic elastomer, in addition to EPDM (1) and PP (1), butyl rubber [IIR-065, manufactured by Esso, 0.8% by mole of unsaturation] , Hereinafter abbreviated as IIR (1)] 10 parts by weight and a paraffin-based process oil [Idemitsu Kosan,
[Trade name: Diana process oil], except that 30 parts by weight were blended.

Table 1 shows the results.

[0060]

Example 4 Paraffin-based process oil is 40 PHR
Oil-extended ethylene / propylene / ethylidene norbornene copolymer rubber [ethylene content 78 mol%, iodine value 13, Mooney viscosity ML _{1 + 4} (100 ° C.) 75, hereinafter abbreviated as EPDM (2)] 64 parts by weight And MFR (A
STM D 1238-65T, 230 ° C) 11, polypropylene having a density of 0.91 g / cm ³ [hereinafter referred to as PP
(Abbreviated as (2)) 14 parts by weight, butyl rubber [Mooney viscosity ML _{1 + 4} (100 ° C) 45, unsaturation 1.0 mol%,
Hereinafter, abbreviated as IIR (2)], 14 parts by weight and 8 parts by weight of a paraffinic process oil are kneaded at 180 ° C. for 5 minutes in a nitrogen atmosphere using a Banbury mixer.
The kneaded material was passed through a roll to form a sheet, which was formed into square pellets by a sheet cutter.

Next, the square pellets and a solution obtained by dissolving and dispersing 0.4 parts by weight of peroxide (A) in 0.4 parts by weight of DVB were stirred and mixed by a tumbler blender, and the solution was uniformly spread on the surface of the square pellets. Attached.

Next, the pellets are extruded using an extruder.
The mixture was extruded at 210 ° C. in a nitrogen atmosphere to obtain a pellet-shaped thermoplastic elastomer (d). Hereinafter, it carried out similarly to Example 1.

Table 1 shows the results.

[0064]

[Table 1] (Note) Material rupture: When the base material is destroyed.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-220844 (JP, A) JP-A-2-649 (JP, A) JP-A 1-272646 (JP, A) JP-A-63-1988 241050 (JP, A) JP-A-2-60951 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B32B 1/00-35/00 B60R 13/02

Claims (3)

(57) [Claims] 1. A layer comprising a thermoplastic elastomer (A) composed of a crystalline polyolefin and a rubber, having an intrinsic viscosity [η] of 10 measured at 135 ° C. in a decalin solvent.
Ultrahigh molecular weight polyolefin in the range of 〜40 dl / g and intrinsic viscosity [η] measured in decalin solvent at 135 ° C.
Is a polyolefin composition consisting essentially of a low molecular weight or high molecular weight polyolefin having a range of 0.1 to 5 dl / g, wherein the ultrahigh molecular weight polyolefin is an ultrahigh molecular weight polyolefin and a low molecular weight or high molecular weight polyolefin. A layer comprising the ultrahigh molecular weight polyolefin composition (B) present at a ratio of 15 to 40% by weight with respect to 100% by weight of the total weight of the thermoplastic elastomer laminate. 2. The rubber (b) wherein the thermoplastic elastomer (A) comprises 60 to 10 parts by weight of a crystalline polypropylene (a) and an ethylene / propylene copolymer rubber or an ethylene / propylene / diene copolymer rubber. 40
-90 parts by weight [Total amount of components (a) and (b) is 1
The rubber (b) obtained by dynamically heat-treating a mixture of the rubber (b) and the rubber (b) is partially crosslinked. 3. The thermoplastic elastomer laminate according to item 1. 3. The rubber composition according to claim 1, wherein the mixture further comprises a rubber (c) other than the rubber (b) comprising ethylene-propylene copolymer rubber or ethylene-propylene-diene copolymer rubber and / or a mineral oil-based softener (d). 3) The thermoplastic elastomer laminate according to claim 2, which contains 5 to 100 parts by weight.