JP2006281611A - Method for producing joined body and joined body obtained by the method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for producing the joined body of moldings produced by molding resin compositions containing an alicyclic structure-containing polymer by using a laser which has high joining strength and prevents the occurrence of bubbles on a joining surface. <P>SOLUTION: The method for producing the joined body includes a process in which a laser beam absorber is applied on at least one part of a surface for joining a molding (A) produced by molding a resin composition containing the alicyclic structure-containing polymer and having a glass transition temperature of T<SB>A</SB>(°C) and a molding (B) produced by molding a resin composition having a glass transition temperature of T<SB>B</SB>(°C) (T<SB>A</SB>≥T<SB>B</SB>) together and a process in which while the moldings (A) and (B) are contacted with each other through the absorber, the joining surface is irradiated with laser beams of output (W) ranging from (0.1×T<SB>A</SB>-2.6) to (0.1×T<SB>A</SB>-4.6) to join the moldings (A) and (B) together. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a method for manufacturing a bonded body obtained by bonding a molded body formed by molding a resin composition containing an alicyclic structure-containing polymer, and a bonded body obtained by the manufacturing method. The present invention relates to a method for producing a joined body, which has a strong adhesive force and does not generate foam on a joining surface, and a joined body obtained by the manufacturing method.

Molded articles formed by molding a resin composition containing an alicyclic structure-containing polymer do not generate harmful gases even when incinerated, and have a small amount of elution of catalyst residues and unreacted monomers. Therefore, it is used for food applications such as food containers.
Conventionally, when a resin composition containing an alicyclic structure-containing polymer is used as a food container material, the resin composition containing the alicyclic structure-containing polymer is blow molded or injection molded. The food container was manufactured by integrally forming (method of obtaining a molded body by a single molding step).
However, recently, a container having a complicated shape that cannot be obtained by integral molding has been demanded, and a method for obtaining a container or the like by joining a plurality of molded bodies has been studied.
Examples of the bonding method include a method of bonding using an adhesive, and the bonded body obtained by this method has a case where the compound or polymer used in the adhesive elutes or the bonding surface is transparent. In some cases, the aesthetics of the container deteriorated.
On the other hand, as an excellent method for joining molded products made of transparent or hard-to-adhere adhesives such as polypropylene, laser fusion (melting part of each of the two molded products and integrating them locally It is considered that the molded parts are joined together by the integrated part.).
For example, Patent Document 1 discloses that a molded body formed by molding polypropylene can be bonded using a laser with an output of 30 W.

JP 2001-71384 A

However, the present inventors tried to join a molded body formed by molding a resin composition containing an alicyclic structure-containing polymer using a laser with an output of 30 W. Thus, it was found that the part where the two molded bodies are integrated has a planar shape and is referred to as a fused surface. The present inventors further performed joining of the molded body by laser under various conditions. Depending on the physical properties of the resin composition containing the alicyclic structure-containing polymer and the type and output of the laser to be used, the joining strength was increased. It was found that bubbles are generated on the fused surface when the temperature is low.
Therefore, an object of the present invention is a method for producing a joined body of a molded body obtained by molding a resin composition containing an arbitrary alicyclic structure-containing polymer using a laser, and has high bonding strength. And it is providing the manufacturing method of the conjugate | zygote which does not generate | occur | produce in the bubble of a joining surface.

In order to solve the above problems, the inventors of the present invention focused on the physical properties of the resin composition used in the molded body and the laser irradiation conditions, and as a result of intensive studies, the glass transition temperature of the molded body to be fused and the laser The present invention has been completed by finding that there is a correlation in the output of, and expressing the range showing excellent results by accumulating experiments as an empirical formula.
Thus, according to the present invention,
_A molded product (A) formed by molding a resin composition containing an alicyclic structure-containing polymer and having a glass transition temperature of T _A (° C.), and an alicyclic structure-containing polymer, and having a glass transition temperature. Molded body (B) formed by molding a resin composition having T _B (° C.)
(Here, T _A ≧ T _B ), and a method of manufacturing a bonded body,
(I) a step of applying a laser absorber to at least a part of a surface to which the molded body (A) and / or the molded body (B) are joined; and (II) the molded body (A) and the molded body (B). Output (W) to the joint surface while contacting the
_{(0.1 × T A -2.6) ~} (0.1 × T A -4.6)
There is provided a method for producing a joined body, which comprises the step of irradiating a laser in the range of (1) and fusing the formed body (A) and the formed body (B).
A joined body of (A) and (B) obtained by the above production method is provided, and the joined body is suitable as a food container.

  The method for producing a bonded body according to the present invention has high bonding strength and is generated in bubbles on the bonding surface even when a molded body formed by molding a resin composition containing an alicyclic structure-containing polymer is bonded. A joined body is obtained.

The method for producing the joined body of the present invention comprises:
_A molded body (A) formed by molding a resin composition containing an alicyclic structure-containing polymer and having a glass transition temperature (T _A (° C.));
Using a molded body (B) formed by molding a resin composition containing an alicyclic structure-containing polymer and having a glass transition temperature of (T _A (° C.) (T _A ≧ T _B )) To obtain a joined body composed of (A) and (B).

(Molded body (A) and molded body (B))
The molded body (A) and molded body (B) used in the present invention are formed by molding a resin composition containing an alicyclic structure-containing polymer.

(Aricyclic structure-containing polymer)
The alicyclic structure-containing polymer is a polymer containing an alicyclic structure in the repeating unit of the polymer, and may have the alicyclic structure in either the main chain or the side chain. Examples of the alicyclic structure include a cycloalkane structure and a cycloalkene structure, and a cycloalkane structure is preferable from the viewpoint of the thermal stability of the polymer.
The number of carbon atoms constituting the alicyclic structure is usually 4 to 30, preferably 5 to 20, and more preferably 5 to 15. When the number of carbon atoms is within this range, the resulting molded article is superior in heat resistance.

  The proportion of the repeating unit having an alicyclic structure in the alicyclic structure-containing polymer may be appropriately selected according to the purpose of use, but is usually 50% by weight or more, preferably 70% by weight or more, more preferably 90% by weight or more. When the ratio of the repeating unit having an alicyclic structure in the alicyclic structure-containing polymer is within this range, the obtained molded article is excellent in heat resistance. In addition, the remainder other than the repeating unit which has an alicyclic structure in an alicyclic structure containing polymer is suitably selected according to the intended purpose.

  Examples of alicyclic structure-containing polymers include (1) norbornene polymers, (2) monocyclic olefin polymers, (3) cyclic conjugated diene polymers, and (4) vinyl alicyclic hydrocarbon heavy polymers. And hydrides thereof. Among these, from the viewpoint of heat resistance and mechanical strength obtained, norbornene-based polymers, cyclic conjugated diene polymers, vinyl alicyclic hydrocarbon polymers, and hydrides thereof are preferable, norbornene-based polymers, A vinyl alicyclic hydrocarbon polymer and a hydride thereof are more preferable, and a hydride of a norbornene polymer is particularly preferable.

(1) Norbornene-based polymer The norbornene-based polymer includes a ring-opening polymer of a norbornene-based monomer, and a ring-opening polymer of a norbornene-based monomer and another monomer capable of ring-opening copolymerization therewith. Hydrides thereof, addition polymers of norbornene monomers, addition polymers of norbornene monomers and other monomers copolymerizable therewith, and the like. Among these, a hydride of a ring-opening polymer of a norbornene monomer is most preferable from the viewpoints of heat resistance and mechanical strength of the obtained molded body.

  The norbornene-based monomer is a compound having a norbornene ring structure (referring to an alicyclic ring composed of a bicyclo [2.2.1] hept-2-ene carbon skeleton).

Specific examples of the norbornene monomer include bicyclo [2.2.1] hept-2-ene (common name: norbornene) and derivatives thereof (having a substituent in the ring), tricyclo [4.3.0]. .1 ^2,5] deca-3,7-diene (trivial name: dicyclopentadiene) and their derivatives, tetracyclo [7.4.0.0 ^2,7. 1 ^10,13] trideca -2,4,6,11- tetraene (common name: methanolate tetrahydrofluorene) and derivatives thereof, tetracyclo [4.4.0.1 ^{2, 5.} 1 ^7,10 ] dodec-3-ene (common name: tetracyclododecene), and derivatives thereof. Examples of the substituent include an alkyl group, an alkylene group, a vinyl group, and an alkoxycarbonyl group, but from the viewpoint of moisture resistance of the resulting molded article, the alkyl group, the alkylene group, the vinyl group, etc. have no polarity. Substituents are preferred. The norbornene-based monomer may have two or more of these substituents. Specific examples of the norbornene-based monomer having a substituent include 8-methoxycarbonyl-tetracyclo [4.4.0.1 ^2,5 . 1 ^7,10 ] dodec-3-ene, 8-methyl-8-methoxycarbonyl-tetracyclo [4.4.0.1 ^2,5 . 1 ^7,10 ] dodec-3-ene and the like.

  These norbornene monomers are used alone or in combination of two or more. Norbornene monomers can be used in combination with other monomers capable of ring-opening copolymerization. Examples of the ring-opening copolymerizable monomer include monocyclic olefin monomers such as cyclohexene, cycloheptene, and cyclooctene. These other norbornene-based monomers and other monomers capable of ring-opening copolymerization are used alone or in combination of two or more.

A ring-opening polymer of a norbornene-based monomer, or a ring-opening polymer of a norbornene-based monomer and another monomer capable of ring-opening copolymerization with a monomer component is a known ring-opening polymerization. It can be obtained by polymerization in the presence of a catalyst.
Examples of the ring-opening polymerization catalyst include a metal halide such as ruthenium and osmium, a nitrate or acetylacetone compound, and a reducing agent; a metal halide or acetylacetone compound such as titanium, zirconium, tungsten and molybdenum, and an organoaluminum compound. A catalyst comprising a cocatalyst such as;

  A hydride of a ring-opening polymer of a norbornene-based monomer is usually obtained by adding a known hydrogenation catalyst containing a transition metal such as nickel or palladium to a polymerization solution of the ring-opening polymer, and carbon-carbon unsaturated. It can be obtained by hydrogenating the bond.

  An addition polymer of a norbornene monomer, or an addition polymer of a norbornene monomer and another monomer that can be addition-copolymerized with the norbornene monomer may be added to a known addition polymerization catalyst, for example, And (co) polymerization using a catalyst comprising a titanium, zirconium or vanadium compound and an organoaluminum compound.

  Examples of other monomers that can be addition copolymerized with norbornene monomers include ethylene, propylene, 1-butene, 1-pentene, 1-hexene, 1-octene, 1-decene, 1-dodecene, 1 Α-olefins having 2 to 20 carbon atoms such as tetradecene, 1-hexadecene, 1-octadecene, 1-eicocene, and derivatives thereof; cyclobutene, cyclopentene, cyclohexene, cyclooctene, 3a, 5,6,7a-tetrahydro- Cycloolefins such as 4,7-methano-1H-indene and derivatives thereof; 1,4-hexadiene, 4-methyl-1,4-hexadiene, 5-methyl-1,4-hexadiene, 1,7-octadiene Non-conjugated dienes such as; Among these, an α-olefin, particularly ethylene is preferable.

  These other monomers capable of addition copolymerization with norbornene monomers can be used alone or in combination of two or more. In the case of addition copolymerization of a norbornene monomer and another monomer capable of addition copolymerization, other monomers capable of copolymerization with the structural unit derived from the norbornene monomer in the addition copolymer are used. Appropriately, the ratio with the structural unit derived from the monomer is usually in the range of 30:70 to 99: 1, preferably 50:50 to 97: 3, more preferably 70:30 to 95: 5 by weight. Selected.

(2) Monocyclic cyclic olefin polymer Examples of the monocyclic cyclic olefin polymer include addition polymers of monocyclic cyclic olefin monomers such as cyclohexene, cycloheptene, and cyclooctene.

(3) Cyclic conjugated diene polymer Examples of the cyclic conjugated diene polymer include polymers obtained by subjecting a cyclic conjugated diene monomer such as cyclopentadiene and cyclohexadiene to 1,2- or 1,4-addition polymerization, and hydrides thereof. Can be mentioned.

(4) Vinyl alicyclic hydrocarbon polymer Examples of the vinyl alicyclic hydrocarbon polymer include polymers of vinyl alicyclic hydrocarbon monomers such as vinyl cyclohexene and vinyl cyclohexane, and hydrides thereof; styrene, α -Hydrogenated aromatic ring portion of a polymer of vinyl aromatic monomer such as methylstyrene; and the like, vinyl alicyclic hydrocarbon polymer and vinyl aromatic monomer, and their single amount Any of random copolymers with other monomers copolymerizable with the polymer, copolymers such as block copolymers, and hydrides thereof may be used. Examples of the block copolymer include diblock, triblock, or more multiblock and gradient block copolymers, and are not particularly limited.

  The molecular weight of the norbornene-based polymer, monocyclic olefin polymer and cyclic conjugated diene polymer is appropriately selected according to the purpose of use, but is usually 5,000 to 500,000, preferably 8 in terms of weight average molecular weight. The range is from 10,000 to 200,000, more preferably from 10,000 to 100,000. The molecular weight of the vinyl alicyclic hydrocarbon polymer is also appropriately selected according to the purpose of use, but is usually 10,000 to 300,000, preferably 15,000 to 250,000, more preferably in terms of weight average molecular weight. It is in the range of 20,000 to 200,000. When the weight average molecular weight is in this range, the molding processability of the obtained resin composition and the mechanical strength of the obtained molded product are highly balanced, which is preferable. In the present invention, the weight average molecular weight is a polyisoprene conversion (in the case of a cyclohexane solution) measured by gel permeation chromatography as a cyclohexane solution (a toluene solution when the polymer to be tested is not dissolved) or a polystyrene conversion ( (In the case of a toluene solution).

  The melt mass flow rate (MFR) of the alicyclic structure-containing polymer used in the present invention is not particularly limited, but is preferably in the range of 1 to 100 g / 10 minutes, more preferably in the range of 2 to 70 g / 10 minutes. A range of 3-50 g / 10 min is particularly preferred. When the MFR is in this range, the moldability of the alicyclic structure-containing polymer molding material is good. Here, the melt mass flow rate (MFR) is a value measured according to JIS-K 7210 except that the test temperature is 280 ° C. and the test load is 21.18 N.

  The glass transition temperature (Tg) of the alicyclic structure-containing polymer used in the present invention is preferably 60 ° C or higher, more preferably in the range of 70 ° C to 200 ° C, and in the range of 80 ° C to 170 ° C. Particularly preferred. When Tg is within this range, the resulting molded article has excellent heat resistance and durability. In the present invention, Tg is a value measured by differential scanning calorimetry (DSC) based on JIS K7121.

(Resin composition comprising an alicyclic structure-containing polymer)
The resin composition containing the alicyclic structure-containing polymer used in the present invention contains the alicyclic structure-containing polymer.
The resin composition containing the alicyclic structure-containing polymer can be obtained by adding a compounding agent to the alicyclic structure-containing polymer as necessary so long as the effects of the invention are not impaired.
The proportion of the alicyclic structure-containing polymer in the resin composition is not particularly limited, but is usually 50% by weight or more, preferably 70% by weight or more, more preferably 90% by weight or more, and particularly preferably 95% by weight or more. is there.

(Combination agent)
Compounding agents include antioxidants, lubricants, flame retardants, anti-blocking agents, mold release agents, light stabilizers, UV absorbers, antistatic agents, dispersants, thermal stabilizers, nucleating agents, dispersants, and chlorine scavengers. Agents, crystallization nucleating agents, antifogging agents, pigments, dyes, organic fillers, inorganic fillers, neutralizers, decomposing agents, metal deactivators, antifouling agents, antibacterial agents, and other types of polymers (Rubber or resin).

  In the present invention, it is preferable to use an antioxidant for the purpose of preventing oxidative deterioration and aging deterioration of the resulting molded article. Antioxidants include phenolic antioxidants, phosphorus antioxidants, sulfur antioxidants, etc. Among these, phenolic antioxidants are preferred, and alkyl-substituted phenolic antioxidants are more preferred. . Examples of phenolic antioxidants include 2,6-di-t-butyl-4-methylphenol, 2,6-di-t-butyl-4-ethylphenol, and octadecyl-3- (3,5-di-t. -Butyl-4-hydroxyphenyl) propionate, 2,2'-methylene-bis (4-methyl-6-t-butylphenol), 4,4'-butylidene-bis (6-t-butyl-m-cresol), 4,4′-thiobis (3-methyl-6-tert-butylphenol), bis (3-cyclohexyl-2-hydroxy-5-methylphenyl) methane and the like can be mentioned. Examples of phosphorus antioxidants include triphenyl phosphite, diphenylisodecyl phosphite, phenyl diisodecyl phosphite, and tris (nonylphenyl) phosphite. Sulfur-based antioxidants include dilauryl 3,3′-thiodipropionate, dimyristyl-3,3′-thiodipropionate, distearyl-3,3′-thiodipropionate, lauryl stearyl 3,3 ′. -Thiodipropionate, pentaerythritol-tetrakis- (β-lauryl-thio-propionate), 3,9-bis (2-dodecylthioethyl) -2,4,8,10-tetraoxaspiro [5,5] For example, undecane. These antioxidants can be used alone or in combination of two or more. Although the compounding quantity of antioxidant is suitably selected according to the intended purpose, it is 0.001-5 weight part normally with respect to 100 weight part of alicyclic structure containing polymers, Preferably it is 0.01-1 weight. Part range.

  Other types of polymers (rubber and resin) include olefin polymers such as polyethylene and polypropylene; isobutylene polymers such as polyisobutylene and isobutylene / isoprene rubber; polybutadiene, polyisoprene, and butadiene / styrene random copolymers , Isoprene / styrene random copolymer, acrylonitrile / butadiene copolymer, acrylonitrile / butadiene / styrene copolymer, butadiene / styrene / block copolymer, styrene / butadiene / styrene / block copolymer, isoprene / styrene block Copolymers, diene polymers such as styrene / isoprene / styrene block copolymers and their hydrides; acrylic polymers such as polybutyl acrylate and polyhydroxyethyl methacrylate; Polymers of vinyl compounds such as vinyl alcohol, polyvinyl acetate, and vinyl acetate / styrene copolymers; Epoxy polymers such as polyethylene oxide, polypropylene oxide, epichlorohydrin rubber; Vinylidene fluoride rubber, Tetrafluoroethylene-propylene rubber And the like. These polymers may have a crosslinked structure, or may have a functional group introduced by a modification reaction. Among the above polymers, a diene polymer is preferable in terms of rubber elasticity, mechanical strength, flexibility, and dispersibility, and a hydride obtained by hydrogenating a carbon-carbon unsaturated bond of the polymer is particularly preferable.

  The resin composition containing the alicyclic structure-containing polymer used in the present invention is not particularly limited by its preparation method. For example, a method in which an alicyclic structure-containing polymer and a compounding agent used as necessary are mixed using a mixer such as a Henschel mixer, a V blender, a ribbon blender, a tumbler blender, or a conical blender; A method of melt kneading with a single screw extruder, twin screw extruder, kneader, etc. and then melt kneading with a single screw extruder, twin screw extruder, kneader, etc .; used as needed for a solution of an alicyclic structure-containing polymer A method in which a solution in which a compounding agent is dissolved is added and dispersed, and then the solvent is removed by a coagulation method, a casting method, or a direct drying method; required for a resin solution at the stage of (co) polymerization reaction or hydrogenation reaction And the like. Although the resin temperature at the time of kneading | mixing is not specifically limited, It is preferable to set it as the temperature of Tg + 50 degreeC-Tg + 150 degreeC of the resin. Moreover, it can be set as a preferable uniform mixing state by fully applying a share. If the temperature of the resin composition at the time of kneading is too low, the viscosity becomes high and kneading may be difficult. If the temperature of the resin composition at the time of kneading is too high, the alicyclic structure-containing polymer and the compounding agent may be deteriorated, or the two may not be sufficiently kneaded due to differences in viscosity and melting point. The resin composition containing the alicyclic structure-containing polymer is preferably granulated, pulverized, or pelletized in order to facilitate molding.

  The melt mass flow rate (MFR) of the resin composition containing the alicyclic structure-containing polymer used in the present invention is not particularly limited, but is preferably in the range of 5 to 70 g / 10 minutes, preferably 5 to 35 g / It is more preferably in the range of 10 minutes, particularly preferably in the range of 10 to 30 g / 10 minutes, and most preferably in the range of 15 to 25 g / 10 minutes.

  The glass transition temperature (Tg) of the resin composition containing the alicyclic structure-containing polymer used in the present invention is not particularly limited, but is preferably 60 ° C or higher, and is in the range of 70 ° C to 200 ° C. Is more preferable, and is particularly preferably in the range of 80 ° C to 170 ° C. When Tg is in this range, it is preferable in terms of moldability of the resin composition and heat resistance of the resulting molded body and joined body.

The molded body (A) and the molded body (B) used in the present invention include a resin composition containing an alicyclic structure-containing polymer having a glass transition temperature of T _A (° C.), and a glass transition temperature of T. Each resin composition containing an alicyclic structure-containing polymer that is _B (° C.) is molded, and T _A ≧ T _B. These resin compositions may be the same or different, and the alicyclic structure-containing polymer in each resin composition may be the same or different. To change the T _A and T _B, or using different alicyclic structure-containing polymer may be the type or amount of the different formulations. Of the two resin compositions, it towards the glass transition temperature is not lower the T _A, the molded body obtained by molding such a resin composition and molded product (A). It towards the glass transition temperature is not high and T _B, the molded body obtained by molding such a resin composition and molded product (B). When TA and TB are the same, the effect of the present invention is the same regardless of which is positioned.

(laser)
The laser that can be used in the present invention is not particularly limited as long as it is a laser used in an ordinary laser fusion method, but glass: neodymium ³⁺ laser, YAG: neodymium ³⁺ laser, ruby laser, helium-neon laser. And laser light such as krypton laser, argon laser, H ₂ laser, N ₂ laser, and semiconductor laser. Among these, a semiconductor laser is preferable because the output is stable and the irradiation area can be precisely controlled. The wavelength of the laser beam is not particularly limited, but is preferably in the range of 808 nm to 940 nm. When the wavelength of the laser beam is in this range, it is preferable from the viewpoints of the adhesiveness of the joint surface and the antifoaming property of the joint surface.

(Method of manufacturing joined body)
In the manufacturing method of the bonded body of the present invention, the laser beam output (W) is adjusted and irradiated in accordance with the glass transition temperatures of the molded body (A) and the molded body (B) to be bonded.
In the present invention,
(I) a step of applying a laser absorber to at least a part of a surface to which the molded body (A) and / or the molded body (B) are joined; and (II) the molded body (A) and the molded body (B). Output (W) to the joint surface while contacting the
_{(0.1 × T A -2.6) ~} (0.1 × T A -4.6)
And a step of fusing the molded body (A) and the molded body (B) by irradiating with a laser in the range. The output (W) of the laser beam is
Preferable to be in the range of _{(0.1 × T A -3.0) ~} (0.1 × T A -4.2),
It is more preferable in the range of (0.1 × T ₁ -3.4) to (0.1 × T ₁ -4.0).

  Although the scanning speed of a laser is not specifically limited, Usually, it is 0.1-500 m / sec, Preferably it is 1-100 m / sec. The laser beam is irradiated substantially perpendicularly (60 to 120 °, preferably 80 to 100 °) with respect to the bonding surface. The incidence of the laser may be from the molded body (A) side or from the molded body (B) side.

  In the present invention, a laser absorber applied to the surface where the molded body (A) and the molded body (B) are in contact, absorbs the laser energy and converts it into thermal energy, and the molded body (A) and the molded body ( B) is fused. A laser absorber will not be specifically limited if it consists of a substance which absorbs the laser to be used rather than the resin composition (A) and the same (B) to be used. Substances that can be used for the laser absorber are not particularly limited, but carbon materials such as carbon black, carbon fiber, and graphite; inorganic colorants such as composite oxide pigments, copper phthalodianine pigments, and phthalocyanine pigments And the like, and the like. Of these, phthalocyanine pigments are colored before joining, but are preferred after joining because they become transparent in the visible light region. A material in which these materials are dissolved or dispersed in a solvent is applied to at least a part of the joint surface, and preferably dried to obtain a laser absorber. Examples of the solvent used here include water, alcohols such as ethanol, and other organic solvents such as acetone. However, alcohols are preferable because they are easily dried and have high safety in the working environment.

  According to the method for producing a joined body of the present invention, a joined body having high joining strength and not generated in bubbles on the joining surface can be obtained.

The joined body of the present invention is excellent in adhesiveness and transparency of the joined portion. Therefore, the joined body of the present invention is useful in various fields as various molded articles.
For example, medical equipment; electrical insulation materials; electronic parts processing equipment; optical materials; light-receiving element window through electronic parts applications; windows, equipment parts, housing and other structural materials and building materials; bumpers, room mirrors, headlamp covers Automotive equipment such as tail lamp cover and instrument panel; Electrical equipment such as speaker cone material, speaker vibration element and microwave container; Food containers such as bottles, returnable bottles and baby bottles; Available.
Among them, since the bonded body of the present invention does not use an adhesive, the compound or polymer used in the adhesive is not eluted and is suitable as a food container.

  Hereinafter, although a manufacture example, an Example, and a comparative example are given and this invention is demonstrated more concretely, the scope of the present invention is not limited to these examples. In these examples, unless otherwise indicated, parts are on a weight basis. Moreover, the measuring method of various physical properties is as follows.

[Glass transition temperature (Tg)]
It measured by the differential scanning calorimetry (DSC) based on JISK7121.
[Adhesion test]
Evaluation was made with x for those that were easily peeled by hand, and ○ for those that were not easily peeled.
[Appearance of joint surface]
The case where the joint surface was foamed was evaluated as x, and the case where there was no foam was evaluated as ◯.

[Example 1]
Two 10 cm × 5 cm × 1 mm molded bodies (molded bodies (A) formed by molding a resin composition (manufactured by Zeon Corporation; Zeonore 1020R (Tg = 96 ° C.)) containing an alicyclic structure-containing polymer. ) And a molded body (B)) were prepared. One side of the molded body (A) was coated with a phthalocyanine pigment dispersed in ethanol at a concentration of 10% by weight. After drying, the molded body (B) was superposed so as to be in contact with the coated surface.
Next, while lightly pressing the molded body (A) and the molded body (B) by hand, using a laser fusion machine (FD-100, manufactured by Fine Device Co., Ltd.) under conditions of laser output 5 W and scanning speed 10 mm / sec. Laser bonding was performed to obtain a joined body including the formed body (A) and the formed body (B). Using the obtained bonded body, an adhesion test and observation of the bonded surface were performed. The results are shown in Table 1.

[Example 2]
Laser fusion was performed in the same manner as in Example 1 except that the laser output was changed to 7 W, and an adhesion test and observation of the bonding surface were performed. The results are shown in Table 1.

[Comparative Example 1]
Laser fusion was performed in the same manner as in Example 1 except that the laser output was changed to 1 W, and an adhesion test and observation of the bonding surface were performed. The results are shown in Table 1.

[Comparative Example 2]
Laser fusion was performed in the same manner as in Example 1 except that the laser output was changed to 20 W, and an adhesion test and observation of the bonding surface were performed. The results are shown in Table 1.

[Example 3]
As a resin composition containing an alicyclic structure-containing polymer (manufactured by Nippon Zeon Co., Ltd .; Zeonore 1420R (Tg = 96 ° C.)), except that the laser output was changed to 7 W, the same as in Example 1, Laser fusion was performed, and an adhesion test and observation of the bonded surface were performed. The results are shown in Table 1.

[Example 4]
As a resin composition containing an alicyclic structure-containing polymer (manufactured by Nippon Zeon Co., Ltd .; Zeonore 1420R (Tg = 96 ° C.)), except that the laser output was changed to 11 W, the same as in Example 1, Laser fusion was performed, and an adhesion test and observation of the bonded surface were performed. The results are shown in Table 1.

[Comparative Example 3]
Except for using a resin composition containing an alicyclic structure-containing polymer (manufactured by Nippon Zeon Co., Ltd .; ZEONOR 1420R (Tg = 96 ° C.)), laser fusion was performed in the same manner as in Example 1 for adhesion. Test and observation of the bonding surface. The results are shown in Table 1.

[Comparative Example 4]
As a resin composition containing an alicyclic structure-containing polymer (manufactured by Nippon Zeon Co., Ltd .; Zeonore 1420R (Tg = 96 ° C.)), except that the laser output was changed to 7 W, the same as in Example 1, Laser fusion was performed, and an adhesion test and observation of the bonded surface were performed. The results are shown in Table 1.

[Comparative Example 5]
As a resin composition containing an alicyclic structure-containing polymer (manufactured by Nippon Zeon Co., Ltd .; Zeonore 1420R (Tg = 96 ° C.)), except that the laser output was changed to 20 W, the same as in Example 1, Laser fusion was performed, and an adhesion test and observation of the bonded surface were performed. The results are shown in Table 1.

Table 1 shows the following.
(I) The step of applying a laser absorber to at least a part of the surface to be joined of the molded body (A) and / or the molded body (B) of the present invention, (II) the molded body (A) and the molded body (B ) while crimping the molded body (a) or moldings (from B) side, the output (W) is _{(0.1 × T a -2.6) ~} (0.1 × T a -4.6) By a method of manufacturing a joined body, which includes a step of irradiating a laser in the range of 5 and melting the molded body (A) and the molded body (B) at a surface where the molded body (A) and the molded body (B) are in contact with each other. The obtained joined body is excellent in joining strength, and no bubbles are generated on the joining surface (Examples 1 to 4).
On the other hand, when the output of the laser is weaker than (0.1 × T _A −2.6) (W), the obtained bonded body is inferior in bonding strength (Comparative Examples 1 and 3). The output of the laser (0.1 × _T A -4.6) When stronger than (W), the conjugate obtained is foamed on the bonding surface (Comparative Examples 1 and 3).

Claims (3)

_A molded product (A) formed by molding a resin composition containing an alicyclic structure-containing polymer and having a glass transition temperature of T _A (° C.), and an alicyclic structure-containing polymer, and having a glass transition temperature. Molded body (B) formed by molding a resin composition having T _B (° C.)
(Here, T _A ≧ T _B ), and a method of manufacturing a bonded body,
(I) a step of applying a laser absorber to at least a part of a surface to which the molded body (A) and / or the molded body (B) are joined; and (II) the molded body (A) and the molded body (B). Output (W) to the joint surface while contacting the
_{(0.1 × T A -2.6) ~} (0.1 × T A -4.6)
The manufacturing method of the joined body characterized by having the process of irradiating the laser which exists in the range, and fuse | melting a molded object (A) and a molded object (B).   The joined body of a molded object (A) and a molded object (B) obtained by the manufacturing method of Claim 1.   The joined body according to claim 2, which is a food container.