JP2001316503A - Thermoplastic resin molding and method for producing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a thermoplastic resin molding having high adhesiveness to other members. SOLUTION: This thermoplastic molding is a thermoplastic molding provided with a part molded from a composition comprising one or more resins selected from the group consisting of a styrene resin, a styrene-based elastomer, an ionomer resin, an ethylene-methacrylic acid resin and an ethylene vinyl acetate resin and a treated part subjected to plasma discharge treatment on the surface of the molded part. The thermoplastic molding comprises the treated part having high adhesiveness to other members. For example, a window molding 21 formed by using an olefinic elastomer as a main raw material comprises a part which is brought into contact with a urethane-based sealant 29 for bonding a window glass 27 to a body panel 28 and is composed of a molded part containing the styrene-based elastomer. The surface of the molded part is made into a part to be treated and coated with a silane-based primer to excellently bond the window glass to the body panel.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molded article of a thermoplastic resin having a thermoplastic molded portion bonded to another member or composition.

[0002]

2. Description of the Related Art In general, when a resin material is used for interior and exterior members and building materials for automobiles, a molded product is not used as it is, but surface painting or flocking is often applied. Also,
When used as a seal member or the like, adhesion to other members (metal, wood, other resin members, etc.) is required. In any case, the resin member has a portion that adheres to some substance, and a certain degree of adhesive strength must be obtained between the adherend and the resin member. In recent years, olefin-based thermoplastic resins and the like have been widely used as thermoplastic resins having the above properties, instead of vinyl chloride resins which are considered to cause environmental problems at the time of disposal. However, since the olefin-based thermoplastic resin has low adhesiveness to other members, it is conceivable to improve the adhesiveness by performing a plasma discharge treatment on an adhesive surface or a processed surface in advance to obtain an appropriate adhesive strength. . However, the treatment of the surface of the olefin-based thermoplastic resin by plasma discharge requires discharge in vacuum and / or long-term discharge in order to obtain desired adhesiveness.

[0003]

Therefore, in the present invention,
It is an object of the present invention to provide a thermoplastic resin molded article having high adhesion to other substances, and to provide a method for producing such a thermoplastic resin molded article. Another object of the present invention is to provide a method for manufacturing a thermoplastic resin molded article having high adhesiveness to another substance in a short time.

[0004]

In order to solve the above problems, the present invention provides a styrene resin, a styrene elastomer, an ionomer resin, an ethylene methacrylate resin,
And a part molded with a composition containing one or more resins selected from the group consisting of ethylene vinyl acetate resin, and a part to be processed which has been subjected to plasma discharge treatment on the surface of the molded part, Provided is a plastic resin molded article. According to the present invention, by applying a plasma discharge treatment to a molded portion containing a resin having a polar group to form a portion to be treated, high adhesiveness to another member, particularly to another synthetic resin, is imparted. In the present specification, when simply referred to as “molded portion”, 1 or 2 selected from the above-mentioned group is used.
It refers to a portion molded from the composition containing the above resin.

[0005] Further, there is provided the above-mentioned molded article, wherein the molded part is provided on an olefin-based thermoplastic resin layer.

[0006] Further, there is provided the above-mentioned molded article, wherein the molded part contains an olefin-based thermoplastic resin. Further, the molded part provides a molded article containing 2.5 to 50 parts by weight of a styrene-based thermoplastic elastomer with respect to 100 parts by weight of an olefin-based thermoplastic elastomer. According to the present invention, the portion to be treated has high weather resistance and chemical resistance, and has good fusion with the olefin-based thermoplastic resin.

Further, the present invention provides any one of the above-mentioned thermoplastic resin molded products, wherein the molded product comprises a resin layer on the portion to be processed. In addition, the present invention provides the molded article, wherein the resin layer is one or more layers selected from a primer layer, a coating film, an adhesive layer, and an adhesive layer. According to these inventions, a molded article provided with a resin layer with good adhesion can be obtained.

In the present invention, one or more resins selected from the group consisting of a styrene resin, a styrene-based elastomer, an ionomer resin, an ethylene methacrylate resin, and an ethylene vinyl alcohol copolymer resin, or a resin selected from the group described above. A step of obtaining a molded body having a molded part molded with a composition containing one or more resins and an olefin-based thermoplastic resin to be performed, and a step of performing a plasma discharge treatment on the surface of the molded part. And a method for producing a thermoplastic resin molded article.

In the above-mentioned manufacturing method, there is provided a method for producing a thermoplastic resin molded body, comprising extruding a molded body having the molded part, and subsequently subjecting the surface of the molded part to plasma discharge treatment. provide. According to this method, the thermoplastic resin molded body can be extruded and formed, and the plasma discharge treatment of the molded part can be continuously performed as it is, and the thermoplastic resin molded body provided with the part to be processed can be obtained in a short time. it can.

The present invention also provides a method for producing a thermoplastic resin molded article, wherein the molding portion contains a styrene-based elastomer and an olefin-based thermoplastic resin. Further, the present invention provides a method for producing a thermoplastic resin molded article, which comprises a step of forming a resin layer on a molded portion after the plasma discharge treatment.

[0011]

Next, an embodiment of the present invention will be described in detail. The thermoplastic resin molded article of the present invention can be used as a plastic molded article having a thermoplastic resin molded part. In particular, it is preferably used for a trim material which is a long member attached to the outer edge or surface of another member. In this case, the adhesive and / or adhesive portion is a thermoplastic resin molded portion. Further, it is preferable that the molding part is provided as a flexible part.

This thermoplastic resin molded article has a molded part molded from a composition containing a thermoplastic resin having a polar group, and its surface is subjected to plasma discharge treatment to form a part to be treated. As a thermoplastic resin having a polar group, styrene-based resin, styrene-based elastomer, ionomer resin, ethylene methacrylate resin (EMMA resin),
Examples include ethylene vinyl acetate resin (EVA resin). When the portion other than the molding portion contains an olefin-based thermoplastic resin, if the composition constituting the molding portion contains the olefin-based thermoplastic resin, the fusing property and the like are increased, and the composition can be integrally molded. ,preferable. When an olefin-based thermoplastic resin is contained, a thermoplastic resin molded article having excellent weather resistance and chemical resistance and high adhesiveness to other members is obtained.

The part to be processed formed on the surface of the molding part has a high adhesiveness mainly to other synthetic resins, and the formation of a coating film,
Application of an adhesive or a pressure-sensitive adhesive, or flocking through a synthetic resin layer is facilitated. Further, the adhesiveness and adhesion to various members made of synthetic resin are improved.

The molded part is formed in a part of the molded body including a part that requires adhesion or adhesion to other members or the like. The whole molded body may be the molding part or a part thereof. Specifically, the molding portion is formed so as to include a portion to be brought into contact (adhesion, close contact, etc.) with another member, a surface processed portion, or a portion where a coating film is formed for the purpose of coloring or the like. . Further, the molding portion may be formed so as to include a portion of the molded body that is exposed to an environment where deterioration such as outside air is relatively likely to proceed. When only a part of the thermoplastic resin molded body is used as a molding part, the other part can be formed of an arbitrary thermoplastic resin.

[0015] The thermoplastic resin material (molding site material) forming the molding site contains a thermoplastic resin having a polar group. Examples of the thermoplastic resin having a polar group include a styrene resin, a styrene-based elastomer, an ionomer resin, an ethylene methacrylate resin, and an ethylene vinyl acetate resin. When molding the thermoplastic resin molded body and the other part with a different resin material, the molding part material is
It is preferable to select a material that can be easily fused to the other part of the thermoplastic resin. When it is desired to impart elasticity to the thermoplastic resin molded article, it is preferable to use an elastomer material. For example, it contains a polymer blend obtained by mixing an olefin-based thermoplastic elastomer (TPO) and a styrene-based thermoplastic elastomer (SBC). Thermoplastic material
(Hereinafter, referred to as a blend material).

In the case of molding the molding portion with a blend material,
TPO, one of the blend materials, is not particularly limited,
Various ones can be used. Preferably, the hard segment includes polypropylene. The soft segment is ethylene propylene diene rubber (EPD).
Those containing M) and / or ethylene propylene rubber (EPM) are preferred. TPO may be simply mixed by mechanical means such as a Banbury mixer,
A material obtained by partially cross-linking the soft segment by adding an organic peroxide, or a material forming an IPN (interpenetrating polymer network structure) can be used. Preferably, a mechanically mixed blend is used.

The SBC which is the other of the blend materials is not particularly limited, and various materials can be used. Preferably, the hard segment contains polystyrene, and the soft segment contains one or more of polybutadiene, polyisoprene, and polyethylene-polybutene. The SBC uses a block copolymer of a hard segment and a soft segment, and has an ABA type,
(AB) _n X type and the like, but ABA type is preferable.

The mixing ratio of TPO and SBC is TPO10
It is preferable that the SBC is 2.5 to 50 parts by weight based on 0 parts by weight. If the amount is less than 2.5 parts by weight, the adhesiveness and the like will be significantly reduced, and if it is more than 50 parts by weight, the weather resistance and the chemical resistance will be significantly reduced and will not be usable for exterior use. In particular, when the thermoplastic resin molded article is used under severe environmental conditions such as a place where it is exposed to the outside air, in order to ensure weather resistance and chemical resistance, the compounding ratio is 5 to 35 parts by weight of SBC with respect to 100 parts by weight of TPO. Is more preferable. Within this range, it is possible to provide an exterior vehicle member or a building member that maintains good weather resistance and chemical resistance while ensuring good adhesiveness to an adhesive.

The materials constituting the entire thermoplastic molded article including the molding site material may include, if necessary, an antioxidant, an ultraviolet absorber, a hydrolysis inhibitor, a fluidity improver, an anti-adhesive, and a colorant. Such additives as can be added as appropriate.
For example, a process oil can be added as a softening agent and a plasticizer, and talc can be added as a filler. Further, the composition is not limited to the additive alone, and may be modified by mixing another synthetic resin such as a polyol or a polyester polyol.

The portion to be processed is obtained by subjecting the surface of the molding site to plasma discharge treatment. In the present specification, the plasma discharge treatment refers to treatment with positive and negative charged particles and / or excited molecules (hereinafter, referred to as plasma) generated by gas discharge. The gas discharge mentioned here includes various gas discharges such as corona discharge, arc discharge, and glow discharge. The formation of the processing target portion of the present invention is preferably performed by corona discharge or arc discharge. Also,
It is preferable to perform a plasma jet process in which the generated plasma is blown onto a surface to be processed together with a gas such as air. When a plasma discharge treatment is performed on a molding portion, polar groups such as a carboxyl group, a carbonyl group, and a hydroxyl group are generated on the surface, and wettability and adhesiveness are improved. Further, when a crosslinked structure is formed by the plasma discharge treatment, it contributes to an improvement in adhesiveness.

The portion to be processed is formed at a portion of the molded body where adhesion or adhesion to other members or the like is required.
Further, it can be formed at a portion exposed to a severely degraded environment. Various resin layers or resin members can be provided on the processing target portion. The resin layer is often formed of a synthetic resin composition. The various resin layers include, for example, a primer layer, a coating film, an adhesive layer, a pressure-sensitive adhesive layer, and the like. By providing a primer layer, an adhesive layer, and a pressure-sensitive adhesive layer, it is possible to improve the adhesiveness with other members, and by forming a coating film and covering a portion to be processed,
A protective layer can be provided, and at the same time, a color, a pattern, and the like can be provided to a molded portion to improve appearance.

Further, the object to be processed may be provided with another attachment through these resin layers. For example, a double-sided tape having a resin layer or the like may be attached to the processing target portion. Further, an attachment that improves the slidability with another member such as a flocked portion via a resin layer may be provided. Since the portion to be processed and the resin layer or the portion to be processed and the mounted object are in good contact with each other, the mounted object is also stably held at the molded portion.

The thermoplastic resin molded article of the present invention can have desired flexibility in the whole or a part of the molded article, and the whole or a part of the molded article can be elastically deformed. Therefore, it can be mounted according to the shape of another member to be bonded or adhered. Further, the processing target portion can be adhered and fixed to another member with good adhesion via a resin layer such as an adhesive. Further, the attachment can be provided to the molded body with good adhesion.

Further, the molded article of the present invention can change the material of the molding portion and the resin material of other portions,
In addition to providing a processing target part having high adhesiveness and adhesion, desired properties and functions can be imparted to predetermined portions. For example, when the molded article of the present invention is used in a part exposed to the outside air, if a part other than the molded part is formed of a thermoplastic resin having excellent weather resistance, for example, TPO, a part having a high adhesiveness to other members is formed. Thus, a molded article having weather resistance and chemical resistance can be obtained. In addition, a portion that can be exposed to the outside air is formed in the molded portion to provide a portion to be processed, and a coating film having predetermined properties such as weather resistance can be formed. In this case, the coating film is also a physical protective film and a design layer on the outer surface. As described above, a molded article having adhesion to a predetermined portion and having excellent weather resistance and stain resistance can be obtained.

For this reason, it is preferable that the present molded body is applied to a member that fills a gap between the two members or adheres to prevent the flow of moisture, for example, a trim material. Specifically, it is applied to trim materials for automobiles, for example, moldings such as window moldings, belt moldings, side moldings, and roof moldings for exterior use, run channels, weather strips, and joint materials for construction. Is preferred. Further, it is preferable to form the coating film by providing the molding portion and the portion to be processed on the outer surface that is not the adhesion imparting portion. Thereby, it is possible to obtain a trim material having good appearance, weather resistance, stain resistance and the like.

Next, a method for producing the thermoplastic resin molded article of the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic diagram showing a series of steps for producing the thermoplastic resin molded article of the present invention. FIG. 1 shows a molding apparatus 1.
1, each of the apparatuses constituting the apparatus for manufacturing a thermoplastic resin molded article of the present invention, which includes a WBL removing apparatus 12, a plasma discharge processing apparatus 14, a surface processing apparatus 16, and a cutter 18, is shown. In FIG. 1, it is assumed that a molding material 1 molded by a molding device 10 is sequentially transferred to each device at a speed substantially equal to a molding speed in a long shape.

The molding device 10 is a conventionally known extrusion molding device having an extruder for feeding a thermoplastic resin as a raw material, an extrusion die, a shaping die, and a cooling device. The molding of the molded article of the present invention is not limited to extrusion molding, and various molding methods such as injection molding, blow molding, and inflation molding are possible. If so, extrusion is preferred. In the case where only a part of the present molded body is formed of the blend material, in the extrusion molding, the molded portion can be satisfactorily integrally molded by extruding the laminated body.

When only the molding site is formed of an ionomer resin or an ethylene methacrylate resin and the other portions are formed of an olefin thermoplastic elastomer, the solubility parameters of the molding site material and the olefin thermoplastic elastomer are the same or similar. It is preferable that the compound has compatibility and shows good fusion. In addition, it is particularly preferable that the molding temperatures are the same or similar, and it is possible to manufacture with one extrusion mold. When the molding temperature of the molding material and that of the olefin-based thermoplastic elastomer are significantly different, the other parts can be molded first, and the molded part can be formed by molding the molded part while supplying the molded part to the molding die. .

The molding material 1 whose outer shape has been molded by the extrusion molding device 10 may be subjected to plasma discharge treatment as it is, but in the present embodiment, the surface to be processed of the molding portion is moved forward by the WBL removing device 12. To process. WBL (weak boundary layer) removal device 12
May be a conventionally known device capable of performing a known WBL removal treatment such as an ultraviolet irradiation treatment or a solvent treatment. For example, in the ultraviolet irradiation treatment, a low-pressure mercury lamp is used, and a low wavelength, preferably 18
Excellent WBL by irradiating 4.9nm and 254.0nm ultraviolet rays
Substances that inhibit homo-adhesion can be removed. In the case of the solvent treatment, a substance capable of dissolving the blended material of TPO and SBC in good contact with the surface of the molding site can remove the substances that inhibit adhesion and WBL. WBL
In the removal treatment, impurities such as additives and low molecular weight oxides present on the surface of the molding portion of the molding material 1 can be removed. As a result, a surface with higher adhesiveness can be obtained, and the effect of the subsequent plasma discharge treatment can be enhanced.

Next, the surface of the molded portion is subjected to plasma discharge treatment by the plasma discharge treatment device 14. FIG. 2 schematically shows one embodiment of the plasma discharge treatment apparatus. In FIG. 2, an elongated main molded material 1 has a molding portion 2 on an upper surface,
A plasma generator (not shown) and a plasma outlet 15 are provided above the molding portion 2. The plasma outlet 15 is formed by combining plasma generated by arc discharge in the plasma generator with air,
That is, by spraying on the surface of the molding portion 2 of the molding material 1,
The processed part 3 is formed.

In the plasma discharge treatment, the surface of the molding portion to be treated (the surface to be treated) is treated more efficiently as it comes closer to the outlet 15. Further, it is preferable that the distance from each part of the surface to be processed to the outlet 15 be substantially equal, since uniform processing can be performed. For this reason, for example, even in the case of the shape shown by the dotted line in FIG. 2, it is preferable to elastically deform and support the distance from the outlet 15 on the surface to be processed to be more uniform.

Further, in the present embodiment, even if the plasma discharge treatment is performed for a short time, the adhesiveness of the portion to be processed formed on the surface of the molding portion can be improved to a desired degree. According to the above, the processing target portion which is the bonding surface can be formed. When performing the plasma discharge treatment from the molding in-line, at least one of the surface to be treated and the outlet 15 is moved at a constant speed in the longitudinal direction of the molded body before the plasma discharge treatment and the gas is sprayed. The entire surface can be uniformly treated, which is preferable.

The molded material 1 subjected to the plasma discharge treatment can be cut into a predetermined length to form a molded body as it is.
Further, by applying the resin layer, a molded article surface-treated with the resin layer can be obtained. In FIG. 1, a surface processing device 16 is a device that applies a primer to a portion to be processed to form a better adhesive surface. The surface processing device 16 includes:
A primer is applied to a portion to be processed formed by the plasma discharge processing device 14 with an application roll, and dried with hot air using a dryer. Since the portion to be treated has high adhesiveness to the primer, the primer can be adhered well while moving at the extrusion speed. The coating roll for applying the primer is made of silicon that can be elastically deformed in accordance with the uneven shape of the processing target portion, so that the primer can be uniformly applied to the processing target portion.

In the manufacturing process shown in FIG. 1, a molded body can be obtained by finally cutting the molded material 1 to a predetermined length with the cutter 18. The cutting of the molded body into a predetermined length can be performed after an arbitrary step such as immediately after extrusion molding or immediately after plasma discharge treatment.

Next, an automotive trim material according to an embodiment of the thermoplastic resin molded article of the present invention will be described with reference to the drawings. FIG. 3 is a cross-sectional view of a window molding 21 according to an embodiment of the present invention.
And a state provided in a gap between the window glasses 27. The window molding 21 is a long member provided along the edge of the window glass 27 which is fixedly attached, at the joint between the vehicle body panel 28 and the window glass 27, and each of the glass holding portions 2 extending in the longitudinal direction.
2, having a leg 23 and a lip 24. The glass holding portion 22 is an L-shaped portion that is in close contact with the thickness portion and the outer edge of the window glass 27, and the leg portion 23 is a convex portion that comes into contact with a urethane-based sealant 29 that joins the window glass 27 and the vehicle body panel 28. It is. Also, the lip 24
A portion where the window glass 27 and the design surface of the vehicle body panel 28 are continuous with a smooth curve, and are pushed by the design surface of the vehicle body panel 28 to be elastically deformed.

The window molding 21 has molding portions 23b and 24b made of a blended material from the inner surface of the leg 23 and the lip 24 to a predetermined thickness. The entire surface of the leg 23 and the inner surface of the lip 24 are formed. Are subjected to the plasma discharge processing to form the processed parts 23a and 24a. In addition,
The other portion is formed of TPO, and the window molding 21 is a thermoplastic resin molded body having a molding portion provided on the olefin-based thermoplastic resin layer. For this reason, this window molding 21 adheres well to the urethane-based sealant 29 at the processing target parts 23a and 24a,
And it is a member excellent in weather resistance.

That is, in the window molding 21 provided in the gap between the edge of the window glass 27 and the vehicle body panel 28, the window glass 27 and the vehicle body panel 2
At least a part of the surface that comes into contact with the liquid sealant (29) that is to be joined with the molding material 8 is used as a molding part of the blend material to form a part to be processed. Also, in this window molding 21, if a silane-based primer is applied as a resin layer to a portion to be treated that comes into contact with the liquid sealant (29), the portion to be treated and the silane-based primer adhere well, and furthermore, the primer and the liquid This is preferable because the sealant (29) adheres more firmly.

The surface (the inner surface of the concave portion) of the glass holding portion 22 of the window molding 21 which is in contact with the window glass is used as a molding portion, and is formed on the portion to be processed.
By providing an adhesive or an adhesive (typically a double-sided adhesive tape) via these, the adhesion between the glass holding portion 22 and the window glass 27 can be further improved, which is preferable. In addition, this form is not limited to a window molding, and in various automotive trim materials, a part to be bonded to a glass member is formed into a molded part, and after processing the processed part, the resin layer is formed or the resin layer is formed. It is preferable to form and further attach a deposit.

FIG. 4 shows a belt molding 31 which is an embodiment of the thermoplastic resin molded article of the present invention. The belt molding 31 is a member that is attached to a flange (not shown) of an outer panel at the lower end of the window of the door and adheres to a vertically movable window glass 38 to prevent moisture from flowing. The belt molding 31 has a tubular portion 32 with an open lower surface that covers the flange of the door panel, and two lips 33 and 34. The lips 33, 34
An elastic member that extends from the outer surface of the window glass 2 toward the window glass and elastically deforms to closely adhere to the window glass, thereby preventing the window glass from being shaken. Cylindrical portion 32,
The lips 33 and 34 are respectively provided along the long axis of the belt molding.

In the belt molding 31, the entire outer surface of the cylindrical portion 32 and the lower surfaces of the lips 33, 34 are formed by molding portions 32b, 3b.
3b and 34b, the surfaces of which are subjected to a plasma discharge treatment to be processed portions 32a, 33a and 34a, and the other portions are formed of TPO. A coating 32 of a synthetic resin such as an acrylic resin is formed on the processing target portion 32a of the cylindrical portion 32, and is colored so as not to impair the external appearance when attached to the door panel. In addition, although the blend material is provided on the outer surface side, since the surface is covered with the coating film 35, it does not directly hit the outside air, and a decrease in the weather resistance of the belt molding 31 is suppressed.

On the other hand, the processed part 33 of the lips 33, 34
A synthetic resin pile (nylon pile) is planted on the a and 34a via a urethane-based adhesive so that the window glass can be in close contact with the window glass without hindering the vertical movement of the window glass. As described above, in a trim material for automobiles such as a belt molding, a portion that is in close contact with a moving glass member is formed in an elastically deformable molded portion, and a plasma discharge process is performed to provide a portion to be processed, thereby forming an adhesive layer. The flock can be satisfactorily adhered through the hair. For this reason, this trim material
There is no hindrance to the movement of the glass member, and good adhesion can be achieved. Another example of a trim material having a portion that is in close contact with a moving glass member is a run channel. In this way, a portion of the trim material to be bonded to another member is defined as a molded portion, formed on a portion to be processed by plasma surface treatment, or after plasma surface treatment, a primer, an adhesive, or one selected from adhesives. By forming two or more resin layers, the adhesiveness with other members can be improved.

Note that the entire inner surface of the cylindrical portion 32 may be formed as a molding portion, and may be formed in the portion to be processed. In a trim material of an automobile, a surface to be in contact with a body panel is used as a molding portion, a plasma discharge process is performed to provide a portion to be processed, and one or more resin layers selected from a primer, an adhesive, an adhesive, etc. It is preferable that the vehicle body panel and the trim material can be satisfactorily adhered to each other by applying the adhesive or further applying an adhesive, an adhesive, or the like.

FIG. 5 is a perspective view schematically showing a part of a run channel 41 for a liftable window glass of an automobile. The run channel 41 holds the elevating window glass 49 and guides the moving direction, and is in close contact with both side edges of the glass to prevent the flow of moisture. The run channel 41 has a width into which the window glass 49 can be inserted, and has a cylindrical portion 42 having an open surface.
Sliding lips 43, 43 facing the inside of the tubular portion 42 and outer lips 44 facing the outside of the tubular portion 42,
44. Note that the run channel 41 of this embodiment is installed such that the entirety of the tubular portion 42 fits inside the door panel.

Since the run channel 41 has a small portion exposed to the outside air, the entire run channel 41 is formed of a blend material to form a molded portion. The upper end face shown in FIG. The surface not facing the side 42 is formed in the processed parts 41a, 43a, 43a. For this reason, the nylon pile can be satisfactorily adhered to the processed portions 43a, 43a of the sliding lips 43, 43 via the urethane-based adhesive, and is used as a flocked portion. The sliding lips 43 of the present embodiment elastically deform the
9 is pinched from both sides so as to be tight enough to prevent the flow of moisture, and
9 can slide smoothly.

The processed portion 41a on the upper end surface of the run channel 41 can be satisfactorily bonded to, for example, an injection molded run channel corner or the like via a urethane-based adhesive. Alternatively, by inserting an upper end surface of the run channel 41 and using an injection mold for a run channel corner portion where a cavity is completed, the corner portion can be formed. That is, the cut end surface of the trim material is used as a molding part, formed on the part to be processed by plasma surface treatment, and a part provided with a resin layer or the like to improve the adhesiveness is arranged in the injection mold, and the cavity is formed. Form a part. Thereafter, by injecting the liquid synthetic resin, the other member can be used as the trim material provided via the resin layer.

When forming a corner for connecting the run channel 41 of the present embodiment to the run channel provided at the upper edge of the window glass 49 frame, the connection end faces of the two types of run channels are covered. When formed in the processing section and arranged so as to be in contact with each connection end of the injection mold at the corner, two types of run channels can be integrally formed in a continuous manner. That is, the two or more molded bodies can be connected by using an injection mold having a cavity formed by arranging two or more processed parts of the molded body of the present invention. In this case,
Either one of the molded body and the corner portion of the present invention can be regarded as another member provided to the other molded body via the resin layer.

FIG. 6 is a perspective view schematically showing a state in which the roof molding 51 according to the present invention is provided at the joint between the center roof panel 57 and the side roof panel 58. The roof molding 51 can conceal the joint between the center roof panel 57 and the side roof panel 58 to form a continuous beautiful appearance. Roof molding 51
Is a long member, along a long axis, a leg 52, a core 53,
And a design part 54. The leg portion 52 is a plate-shaped portion that comes into contact with the surface of a urethane-based sealant 59 that seals a joint portion between the center roof panel 57 and the side roof panel 58. The design part 54 includes the center roof panel 5.
7 and a side roof panel 58 are a plate-shaped portion for continuing a smooth curve, and a core portion 53 is a portion connecting the leg portion and the design portion 54. The roof molding 51
Is formed by inserting a metal core material 53a into the center of the core portion 53. The core material 53a adds rigidity to the roof molding 51 and suppresses expansion and contraction deformation.

The roof molding 51 includes a leg 52 and a core 5.
The lower portion of 3 is a molding portion 52b of the blend material, and only the lower surface of the leg portion 52 is subjected to the plasma discharge treatment to be a processed portion 52a. Since the silane-based primer is applied to the processed portion 52a to improve the adhesiveness with the liquid sealant 59, the roof molding 51 adheres well to the sealant at the processed portion 52a of the leg portion 52.
The other parts are made of TPO, so that they have excellent weather resistance, are exposed to a lot of sunlight, and are hardly deteriorated even if they are provided on the roof of an automobile exposed to severe environmental conditions. in this way,
In the trim material of the car, the part provided on the outermost surface
By forming with TPO, the bonding part with other members is formed in the molding part with the blended material of TPO and SBC, and by making it to be processed part,
A trim material having good adhesion to other members and having excellent weather resistance can be obtained.

FIG. 7 shows a state in which the weather strip 61 according to the present invention is attached to a sunroof glass 69. The weather strip 61 is a long member, and is attached to the outer edge of a glass 69 for a sunroof,
It is a member that comes into close contact with the roof panel so that moisture does not flow. The weatherstrip 61 has a base 62 having a holding portion 63 to which a sunroof glass 69 is sandwiched and adhered, and a seal portion 64 capable of adhering to the roof panel. The seal portion 64 is a long convex portion having a semicircular cross section, and is provided on the back side of the opening of the holding portion 63 with the same width as the base portion 62.

The inner surface of the holding portion 63 of the weather strip 61 is formed as a molding portion 63b, and is formed on the portion to be processed 63a. The weatherstrip 61 is satisfactorily adhered to the glass 69 by applying an adhesive to the portion to be processed 63a and fitting the weatherstrip 61 to the outer edge of the glass 69 before the adhesive dries. The base 62 and the seal 64 are made of TPO and have excellent weather resistance. Further, since the seal portion 64 is formed of a foam having a hollow cross section, the seal portion 64 can be elastically deformed flexibly along the outer edge of the roof panel, and can be in close contact with each other so that moisture does not flow. In addition, the sealing portion 6
The bonding between the base 4 and the base 62 may be integrated when the seal portion 64 is formed, or may be welded after the formation of the seal portion 64. Thus, the thermoplastic resin molded article of the present invention,
A part having a different composition or a different structure other than the molding part may be provided.

FIG. 8 shows a state where the side molding 71 according to the present invention is provided on the outer surface of the door panel 79. The side molding 71 is a long member provided in the horizontal direction along the surface of the door panel, and is formed by a long main body portion 72 extruded and a terminal portion 74 injection-molded. The main body 72 is a long member having an outer shape of a rectangular cross section, and is formed in a hollow shape in which the inside is cut out from a surface adhered to the door panel 79. In the main body 72, the end surfaces of the upper surface and the lower surface adhered to the door panel 79 and the entire peripheral surface constituting the appearance of the side molding 71 are formed as molded parts. The end face of the main body 72 that is bonded to the door panel 79 is formed on the processing target portion by plasma discharge processing, and a urethane-based adhesive is applied to each of the end faces, and each of the end faces is well bonded to the door panel 79. Note that the end portion 74 is separately bonded to the end of the main body 72.

The entire peripheral surface forming the appearance of the main body 72 formed at the molding site is subjected to plasma discharge treatment to form the processing target portion 72a, and the coating film 73 is formed of an acrylic synthetic resin. Is formed. Therefore, the appearance of the side molding 71 can be colored in a desired color according to the door panel 79 of the vehicle body, and the appearance is good.
Further, by forming a coating film on the surface of the side molding 71, the weather resistance can be improved.

FIG. 9 schematically shows a state in which the joint material 91 according to the present invention is provided in the gap between the building panels 101 and 102. The joint material 91 includes a long support 92
And elastic lips 94, 96 in the form of thin plates protruding from both lower side surfaces of the pillar portion 92 and both central side surfaces of the pillar portion 92 are provided along the longitudinal direction of the pillar portion 92. Further, a plate-shaped design portion 97 is provided at the top of the support portion 92, and a reinforcing core material 92 a is provided inside the support portion 92. The elastic lips 94 and 96 are used for the building panel 10.
The elastic lip 9
4 and 96 are bent and pressed against the side surfaces of the building panels 101 and 102 to be fixed.

In the joint material 91, the surface of the design portion 97 is formed by a molding portion 97b of the blend material, and the entire surface of the molding portion 97b is subjected to plasma discharge treatment to form a processed portion 97a. Other parts are formed from TPO.
A coating film is formed on the processing target portion 97 a with an acrylic urethane-based synthetic resin, and the design portion 97 is colored so that the joint material 91 does not impair the appearance of the portion formed by the building panels 101 and 102. Have been. In addition, a coating film made of a synthetic resin has a molded portion 97 formed of a blend material.
b suppresses a decrease in the weather resistance. The other portions made of TPO are formed to have excellent weather resistance and flexibility, so that the lips 94 and 96 can be in close contact with the side surfaces of the panels 101 and 102. For this reason, the joint material 91 prevents water from entering between the panels 101 and 102, and does not impair the appearance.
01 and 102 can be provided.

(Example 1) Extrusion molding was performed using a styrene-based thermoplastic elastomer to obtain a long molded product (samples 1 to 5).
4) was obtained. Next, for each compact set at the fixed position, the electric discharge treatment machine “Plasma Jet” (Corotec Corporatio
n) was operated at an output of 0.5 kW, the distance from the outlet to one surface of the molded body was kept at 2.5 cm, and the one surface of the molded body was subjected to plasma discharge treatment while moving the outlet at 6 m / min. . Immediately thereafter, a urethane-based adhesive TKS-6X (Sanwa Polymer Co., Ltd.) diluted with a solvent was applied to the treated surface with a brush, dried at 80 ° C. for 10 minutes, and left at room temperature to obtain a thickness of about A sample having a 0.25 mm adhesive layer was obtained. Also, for each of the samples 1 to 4, the plasma discharge treatment was not performed.
A control sample on which the adhesive layer was formed was also prepared.

The styrene thermoplastic elastomer used in each sample is shown below. Sample 1 Actimer LQA8970S (manufactured by Riken Vinyl Industry Co., Ltd.) Sample 2 ... Actimer LQA8951S (manufactured by Riken Vinyl Industry Co., Ltd.) Sample 3 ... Actimer LQA0168A (manufactured by Riken Vinyl Industry Co., Ltd.) Sample 4 Thermolan TC05-3B (MKV Corporation)
Made)

Further, extruded products (samples 5 to 10) were obtained using blended materials obtained by blending the olefin-based thermoplastic elastomer and the styrene-based thermoplastic elastomer at various ratios shown in Table 1. By performing the same treatment, Samples 5 to 10 having an adhesive layer having a thickness of about 0.25 mm were obtained. In addition, control samples 5 to 10 were prepared in the same manner as samples 1 to 4. The olefin-based thermoplastic elastomer used in each sample is shown below. As for the styrene-based thermoplastic elastomer, Lavalon SJ400B (manufactured by Mitsubishi Chemical Corporation) was used for all samples. Samples 5 to 8 Santoplane 121-67W (AES
Sample 9: Rheomers LQR0168A (manufactured by Riken Vinyl Industry Co., Ltd.) Sample 10: Actima LQA0167A (manufactured by Riken Vinyl Industry Co., Ltd.)

Further, the same processes as those of Samples 1 to 4 were carried out on the molded articles obtained by extrusion molding using only the olefin-based thermoplastic elastomer, and Comparative Samples 1 to 3 having an adhesive layer having a thickness of about 0.25 mm were obtained. 6 was obtained. The olefin-based thermoplastic elastomer used in each comparative sample is shown below. Also,
In addition, Comparative Samples 1 to 6 were prepared in the same manner as Samples 1 to 4. Comparative Sample 1 Santoplane 121-67W (AES
Comparative Sample 2 Santoplane 121-72W (AES
Comparative sample 3 Santoplane 123-50 (AES
Comparative sample 4 Santoplane 123-52W (AES
Comparative sample 5: Actimer LQA8391S (manufactured by Riken Vinyl Industry Co., Ltd.) Comparative sample 6: Mirastomer G2500B (manufactured by Mitsui Chemicals, Inc.)

Each sample 1 to 24 hours after hot-air drying
10. Regarding Comparative Samples 1 to 6, the edge of the adhesive layer was peeled off with a knife, and the adhesive layer was pulled with a finger in a direction of 90 degrees from the adhesive surface to test the adhesive strength. Table 1 shows the results.

[0060]

[Table 1]

As shown in Table 1, it was found that the plasma treatment of the surface of the material containing the styrene-based thermoplastic elastomer significantly improved the adhesiveness. On the other hand, with the olefin-based elastomer alone, no significant improvement in adhesion was observed even by the plasma discharge treatment. Further, the content of the polar group may be small, and good adhesiveness can be obtained only by adding 2.5 parts by weight of the styrene-based thermoplastic elastomer to 100 parts by weight of the olefin-based thermoplastic elastomer. Was.

(Example 2) A molding material having a polar group was extruded on an olefin-based thermoplastic resin in the form of a laminate, and the surface thereof was subjected to an electric discharge treatment machine “Plasma Jet Surface Treate”.
"r" was operated at an output of 0.5 kW, and plasma discharge treatment (CD treatment) was performed for 5 seconds while maintaining the distance from the outlet to the surface of the molded body at 1.5 cm. Then, primers were immediately applied to obtain samples 11 and 12. For samples 11 and 12, a sealant was applied immediately after the application of the primer, one week later, and four weeks later, and left for 10 days. In addition, as comparative samples, comparative samples 7 and 8 were obtained by applying a primer to the surface of a molded article molded in the same manner as samples 11 and 12 without performing CD treatment. Immediately after the application of the primer, one week and four weeks after the application of the primer, the sealant was applied and left for 10 days. Sample 1
Ten days after application of the primers of Sample Nos. 1 and 12 and Comparative Samples Nos. 7 and 8, the sealant layer was pulled in a direction of 180 ° to test the adhesive strength. Table 2 shows the results.

The olefinic thermoplastic resin used was Rheosomer (manufactured by Riken Vinyl Industry Co., Ltd.), and the following resin having a polar group was used. Sample 11, comparative sample 7: ionomer resin (Himilan, manufactured by Mitsui Dupont Polychemical Co., Ltd.) Sample 12, comparative sample 8: methylene methacrylate resin (Nucrel, Mitsui Dupont Polychemical Co., Ltd.) As a primer, a silane compound-based primer 435-75 (manufactured by Sunstar Co., Ltd.) was used for all samples and comparative samples. In addition, the following three types of urethane-based sealants were applied to all samples and comparative samples, and an experiment was performed. YH …………………………………………………………… Hammatite WS-95 (manufactured by Yokohama Rubber Co., Ltd.) SS ··········· Penguin seal 556 (manufactured by Sans Sunter Co., Ltd.) (Made by Corporation)

[0064]

[Table 2]

As shown in Table 2, it was found that the plasma discharge treatment showed a strong adhesiveness irrespective of the molding material constituting the molding portion where the portion to be treated was formed. In addition, by plasma discharge treatment, even if the sealant was applied four weeks after the application of the primer, the adhesive strength of both samples 11 and 12 was maintained at about 10 kgf. Storage and transportation were possible.

[0066]

According to the present invention, it is possible to provide a thermoplastic resin article having a portion having high adhesiveness. In addition, a thermoplastic resin article having a highly adhesive portion can be manufactured.

[Brief description of the drawings]

FIG. 1 is a schematic view showing a process for producing a thermoplastic resin molded article of the present invention.

FIG. 2 is a sectional view schematically showing a plasma discharge processing apparatus according to the present invention.

FIG. 3 is a perspective view when a window molding according to one embodiment of the present invention is provided in a gap between a vehicle body panel and a window glass.

FIG. 4 is a perspective view when a belt molding according to one embodiment of the present invention is attached to a door panel.

FIG. 5 is a perspective view when the run channel according to one embodiment of the present invention is attached to a door panel.

FIG. 6 is a perspective view when a roof molding according to one embodiment of the present invention is provided between a center roof panel and a side roof panel of an automobile.

FIG. 7 is a perspective view when a weatherstrip according to one embodiment of the present invention is provided on a sunroof glass.

FIG. 8 is a perspective view when the side molding according to one embodiment of the present invention is attached to a door panel.

FIG. 9 is a cross-sectional view when joint materials according to one embodiment of the present invention are provided between building panels.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Molding material 2 Molding part 3 Processed part 10 Molding apparatus 12 WBL removal apparatus 14 Plasma discharge processing apparatus 15 Plasma blowing port 16 Surface processing apparatus 18 Cutter 21 Window molding 22 Glass holding part 23 Leg part 24 Lip 27, 38, 49 Window Glass 28 Body panel 29,59 Urethane sealant 31 Belt molding 32,42 Cylindrical part 33,34 Lip 41 Run channel 43 Sliding lip 44 Outer lip 51 Roof molding 52 Leg 53 Core 53a Core 54 Design part 57 Center Roof panel 58 Side roof panel 61 Weather strip 62 Base 63 Holding part 64 Seal part 69 Glass for sunroof 71 Side molding 72 Main body part 73 Coating film 74 End part 79 Door panel 91 Joint material 92 Post 94,96 Elastic lip 97 Design part 101,102 Architectural panel

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B32B 27/32 B32B 27/32 C C08L 23/08 C08L 23/08 // (C08L 23/08 (C08L 23 / 08 25:04) 25:04) B29K 23:00 B29K 23:00 55:02 55:02 B29L 9:00 B29L 9:00 (72) Inventor Yasuhiro Fukushima 4-1-1 Naganecho, Obu City, Aichi Prefecture Tokai F-term (reference) in Kogyo Co., Ltd. KA01 KA17 KK81 KW41 KW50 4J002 BB121 BB151 BC032 BP012

Claims (10)

[Claims] 1. A styrene resin, a styrene-based elastomer, an ionomer resin, an ethylene methacrylate resin,
And a part molded by a composition containing one or more resins selected from the group consisting of ethylene vinyl acetate resin, and a part to be processed by plasma discharge treatment on the surface of the molded part; Plastic molded article. 2. The thermoplastic resin molded article according to claim 1, wherein the molding portion is provided on an olefin-based thermoplastic resin layer. 3. The thermoplastic resin molded article according to claim 1, wherein the molded portion contains an olefin-based thermoplastic resin. 4. The molding part contains 2.5 to 50 parts by weight of a styrene-based thermoplastic elastomer based on 100 parts by weight of an olefin-based thermoplastic elastomer.
The thermoplastic resin molded article according to the above. 5. The thermoplastic resin molded article according to claim 1, further comprising a resin layer on the portion to be processed. 6. The thermoplastic resin article according to claim 5, wherein the resin layer is one or more layers selected from the group consisting of a primer layer, a coating film, an adhesive layer, and a pressure-sensitive adhesive layer. 7. A styrene resin, a styrene-based elastomer, an ionomer resin, an ethylene methacrylate resin,
One or more resins selected from the group consisting of ethylene vinyl alcohol copolymer resins, or one or more resins selected from the group and an olefinic thermoplastic resin,
A method for producing a thermoplastic resin molded article, comprising: a step of obtaining a molded article having a molded portion molded with a composition containing: and a step of subjecting a surface of the molded portion to plasma discharge treatment. 8. The method for producing a thermoplastic resin molded article according to claim 7, wherein the molded article provided with the molded part is extruded, and subsequently, the surface of the molded part is subjected to plasma discharge treatment. 9. The method for producing a thermoplastic resin molded article according to claim 7, wherein the molded portion contains a styrene-based elastomer and an olefin-based thermoplastic resin. 10. The method according to claim 7, further comprising a step of applying a resin layer to a discharge-treated portion after the plasma discharge treatment.
10. The method for producing a thermoplastic resin article according to any one of items 1 to 9.