JP2009256644A - Platy component - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a platy component having high durability when applied with vibration. <P>SOLUTION: The platy component comprises a resin composition containing 10-55 mass% of a polyamide resin (A), and 45-90 mass% of a styrenic resin (B) containing an ABS resin and substantially containing no fibrous filler, wherein the platy component exhibits a tensile strength (based on ISO 527 for an absolute dry material) of 30-60 MPa, and further the platy component is to be used in a state fixed with metal fixing attachments at one or plural points to a base material surface to which vibration is applied. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a plate-shaped component particularly suitable as an exterior component of a motorcycle.

  Polyamide resins and ABS resins are widely used as materials for motorcycle cowls and fenders. The cowl and fender are fixed to a motorcycle body using bolts and nuts. For this reason, when the motorcycle is traveling, a large vibration is applied to the contact portion between the cowl or the fender and the bolt and nut, so that the contact portion is likely to be cracked.

  This problem can be solved by blending a fibrous filler such as carbon fiber or glass fiber with polyamide or ABS resin. However, cowls and fenders containing a fibrous filler have a problem in terms of aesthetics after painting because of their poor surface smoothness.

  Patent Document 1 includes (A) hydrogenated diene rubber polymer, (B) polyolefin resin, (C) (meth) acrylic acid ester monomer and other monomers copolymerizable therewith. Copolymerized (meth) acrylic ester resin, thermoplastic resin other than (D) (A) to (C), chemical fatigue resistance, impact resistance, molded product surface appearance (colorability) ) Has been disclosed. And it is described that the said composition can be used for various parts, such as a motor vehicle field | area, a housing, a chassis.

Japanese Patent Laid-Open No. 10-45960

  Even when the present invention is used in a state of being fixed with a metal fixing tool at one point or a plurality of points with respect to the surface of the base material to which vibration is applied, the portion fixed with the fixing tool is cracked. It is an object of the present invention to provide a plate-like component that is unlikely to occur.

The present invention provides the following inventions as means for solving the problems.
1. (A) It is a plate-like part made of a resin composition containing 10 to 55% by mass of a polyamide resin and 45 to 90% by mass of a styrene resin containing (B) an ABS resin and substantially not containing a fibrous filler. ,
The plate-like component has a tensile strength (ISO 527: absolute dry product) of 30 to 60 MPa,
Furthermore, the plate-shaped component is used in a state in which the plate-shaped component is fixed to the surface of the base material to which vibration is applied at one point or a plurality of points with a metal fixture.
2. The plate-like component according to claim 1, wherein the plate-like component is fixed to a base material to which vibration is applied only by a metal fixture without interposing a buffer member.
3. The plate-shaped component according to claim 1 or 2, wherein the plate-shaped component is an exterior component that is fixed to a vehicle body or other component of a motorcycle with a metal fixture.
4). The plate-shaped component according to any one of claims 1 to 3, wherein the metal fixture is a combination of a bolt and a nut or a screw.

  In the present invention, a plate-like part means a thin part, and in addition to a part made of a plate-like molded body, the plate-like molded body is transformed into a desired shape according to the application. Or processed products are also included.

  When the plate-like component of the present invention is used in a state of being fixed with a metal fixture at one or a plurality of points on the surface of the substrate to which vibration is applied, the plate-like component is intermittently vibrated over a long period of time. Even when added, damage such as cracks is less likely to occur at the contact portion between the plate-like component and the metal fixture.

Explanatory drawing of the attachment state at the time of using the plate-shaped component of this invention as a fender of a motorcycle. (A)-(d) is explanatory drawing of the attachment state from which the plate-shaped components of this invention differ, respectively. It is the front view and top view for demonstrating the test method of vibration fatigue resistance-1 in an Example. It is the front view and top view for demonstrating the test method of vibration fatigue resistance-2 in an Example. It is the front view and top view for demonstrating the test method of vibration fatigue resistance-2 in an Example.

<Resin composition for producing plate-like parts>
As the polyamide resin of component (A), nylon 6, nylon 66, nylon 610, nylon 612, nylon 11, nylon 12, special transparent nylon, nylon 46, nylon MXD6, nylon 6T, nylon 9T, nylon 6I, nylon 6 / 66, nylon 6/610, polyether ester amide and copolymers thereof, and the like. These can be used alone or in combination of two or more. Among these, nylon 6, nylon 66, and nylon 6/66 are preferable.

  The component (B) is a styrene resin containing an ABS resin, and the component (B) preferably contains 5% by mass or more of the ABS resin. The rubber content of the ABS resin is not particularly limited, but can be in the range of 3 to 70% by mass. Styrenic resins other than ABS resin include AS resin, ASA resin, AES resin, ACS resin, ASS resin, PS resin, HIPS resin, MS resin, MBS resin, MABS resin, SB resin, SBS resin, SEBS resin, SIS. Examples thereof include resins, SIPS resins, SEPS resins, and the like, and those obtained by adding an α-methyl group or phenylmaleimide group to a part of styrene may be used.

The content of the component (A) and the component (B)
(A) A component is 10-55 mass%, Preferably it is 15-50 mass%, More preferably, it is 20-50 mass%,
(B) A component is 90-45 mass%, Preferably it is 85-50 mass%, More preferably, it is 80-50 mass%.

  The composition used in the present invention may further contain a compatibilizer for the component (A) and the component (B). As the compatibilizing agent, acrylic acid-modified ABS resin, methacrylic acid-modified ABS resin, acrylic acid-modified AS resin, methacrylic acid-modified AS resin, maleic anhydride-styrene copolymer, maleic anhydride-acrylonitrile-styrene copolymer, Acid-modified styrene resins such as maleic anhydride-styrene-phenylmaleimide copolymer, maleic anhydride-modified SEBS resin, maleic anhydride-modified SBS resin, maleic anhydride-modified SIS resin, and the like can be used.

  As for content of a compatibilizing agent, 2-50 mass parts is preferable with respect to 100 mass parts of total amounts of (A) component and (B) component.

  The composition used in the present invention is substantially free of fibrous filler. “Substantially free of fibrous filler” means that the content of fibrous filler in the composition is 5% by mass or less, preferably 3% by mass or less, more preferably Most preferably, it is 1% by mass or less and is not contained at all or is contained as an impurity resulting from the production environment.

  The composition used by this invention can contain the well-known additive for resin within the range which can solve the subject of this invention. Known additives for resins include heat, light or oxygen stabilizers, UV absorbers, plasticizers, flame retardants, antistatic agents, lubricants, mold release agents, powder fillers, colorants, and the like. Can do.

<Plate parts>
The plate-like component of the present invention varies in size and shape depending on the application, and the thickness also varies depending on the application, but is usually in the range of about 0.5 to 10.0 mm. Preferably, it is 1.0-5.0 mm, More preferably, it is the range of 1.2-3.0 mm.

  The plate-like component of the present invention has a tensile strength (ISO 527: absolute dry product) of 30 to 60 MPa, preferably 35 to 55 MPa.

  The plate-like component of the present invention can be obtained by molding into a desired shape according to the application by a known molding method such as injection molding.

  The plate-like parts of the present invention include exterior parts (for example, fenders and cowls) fixed to metal bodies or other parts of various motorcycles, as well as exterior parts of bicycles and automobiles, mechanical parts. It can be used as exterior parts such as various household items and exercise equipment that are used in a state in which various vibrations are applied.

<Usage of plate parts>
Next, the usage pattern of the plate-like component of the present invention will be described with reference to FIGS. FIG. 1 is an explanatory view of an attachment state when the plate-like component of the present invention is used as a front fender of a motorcycle (only a part of which is shown). FIGS. 2A to 2D are diagrams for explaining different attachment states of the plate-like parts of the present invention.

  As shown in FIG. 1, a front fender (plate-shaped part) 1 formed into a shape corresponding to a motorcycle to be attached is fixed to a front hydraulic fork 2 with an aluminum stay 3 with screws 4. The stay 3 is fixed only by the screw 5 without using a cushioning component such as a plastic or rubber washer. In addition, the opposite side which cannot be illustrated is also fixed similarly.

  Since the front fender (plate-shaped component) 1 is fixed to the front hydraulic fork 2 via the stay 3, a gap is provided between the front fender (plate-shaped component) 1 and the front hydraulic fork 2. ing. Therefore, the vibration generated by the traveling of the motorcycle is mainly applied to a portion where the front fender (plate-shaped part) 1 is fixed by the screw 5.

  FIG. 2A shows a form in which the plate-like component 11 is fixed to a base material (for example, a motorcycle component) 12 by only bolts 13 and nuts 14 (such as plastic or rubber washers). No cushioning member is used). There is a gap between the plate-like component 11 and the substrate 12. However, the bolt 13 and the nut 14 can use a plurality of combinations as necessary.

  FIG. 2B shows a form in which the plate-like component 21 is fixed to a base material (for example, a motorcycle component) 22 via a metal connection component (for example, the stay 3 in FIG. 1) 23. Show. The connecting component 23 is fixed to the base member 22 with screws 24a and 24b, and the plate-like component 21 is fixed to the connecting component only with the screw 26 (a buffer member such as a plastic or rubber washer). Is not used). However, a plurality of screws 26 can be used as necessary.

  FIG. 2C shows a form in which the plate-like component 31 is fixed to a base material (for example, a motorcycle component) 32 via a metal connection component (for example, the stay 3 in FIG. 1) 33. Show. The connecting part 33 is fixed to the base material 32 with screws 34a and 34b, and the plate-like part 31 is fixed to the connecting part only with a bolt 35 and a nut 36 (plastic or rubber washer or the like). The buffer member is not used. However, a plurality of combinations of bolts 35 and nuts 36 can be used as necessary.

  FIG. 2D shows a form in which the plate-like component 41 is fixed only to the base material (for example, a motorcycle component) 42 with screws 43 (a cushioning member such as a washer made of plastic or rubber). Not used). The plate-like component 41 has a part (screwed part) in contact with the base material 42, and the remaining part is spaced from the base material 42. However, a plurality of screws 43 can be used as necessary.

  In the embodiment shown in FIGS. 2A to 2D, when vibration is applied to the base material 12, 22, 32, 42, a contact portion between the plate-like member 11, the bolt 13, and the nut 14, a plate-like shape The vibration of the contact portion between the member 21 and the screw 26, the contact portion between the plate-like member 31 and the bolt 35 and the nut 36, the portion in contact with the base member 42 of the plate-like member 41, and the contact portion with the screw 43 is the largest. Will receive the power of. In addition, the plate-like component of the present invention includes a form in which the entire plate-like component including a fixing portion with a screw or the like is in contact with the substrate.

  In the prior art, when the force due to the vibration is intermittently applied for a long time (a long number of days), there is a problem that cracks and the like are likely to occur. 31 and 41, even when vibrations are intermittently applied to the base materials 12, 22, 32 and 42 over a long period of time (long days), it is difficult for cracks and the like to occur in the contact portions ( That is, vibration fatigue resistance is excellent). Such effects are exhibited because the plate-like members 11, 21, 31, and 41 of the present invention have excellent vibration fatigue resistance when vibration is applied, and absorb the applied vibration. It is thought that this is because it acts to attenuate.

  When the conventional product is used in the same form as the plate-like member of the present invention, it is easy to cause cracks in the contact portion, and this problem is solved even when buffer parts such as metal washers, plastic washers, rubber bushes are used. It wasn't done. The plate-like component of the present invention can exhibit high vibration fatigue resistance equal to or higher than that when the buffer component is used without using the buffer component. And when applying to the use which an excessively strong vibration is added, higher vibration fatigue resistance can be obtained by combining with the said buffer component.

Examples and Comparative Examples Using the compositions shown in Table 1, extrusion was performed in a strand shape with a twin-screw extruder (cylinder temperature 250 ° C.), and then cut to produce pellets. After pre-drying the obtained pellets (80 ° C. for 4 hours), injection molding (molding conditions: cylinder temperature 250 ° C., mold temperature 60 ° C.) to produce a disk-shaped molded product 100 shown in FIG. The vibration fatigue resistance was tested by the following method. The disk-shaped molded product 100 has a disk portion 101 (diameter 100 mm, thickness 2.0 mm) and fixing tabs 102 and 103 provided at two positions facing each other (length and width 5.0 mm, thickness 1 each). 4 mm and screw holes 102a and 103a having a hole diameter of 2.0 mm).

(Vibration fatigue resistance test-1)
First, a disk-shaped molded product 100 was fixed to a stainless steel substrate (85 × 125 mm, thickness 20 mm) with stainless steel screws 104 and 105 (nominal diameter 1.7 mm, length 10 mm).

  After that, a microplate tray as an attachment is attached to the vortex mixer (IMS-1000 type; manufactured by Tokyo Rika Kikai Co., Ltd.), and a stainless steel substrate with a disk-shaped molded product 100 fixed thereon is fitted onto the tray. It is.

  In this state, the tray was continuously rotated at 500 r / m for 24 hours to test whether or not the fixing tabs 102 and 103 fixed with the screws 104 and 105 were cracked.

（Ａ）成分
Ａ−１：ナイロン６（ユニチカナイロン６ Ａ１０２０ＢＲＬ，ユニチカ（株）製）
Ａ−２：ナイロン６（ユニチカナイロン６ Ａ１０３０ＢＲＬ，ユニチカ（株）製）
（Ｂ）成分
ＡＢＳ樹脂：スチレン４５質量％、アクリロニトリル１５質量％、ポリブタジエン系ゴム４０質量％；アセトン可溶分還元粘度０．５０
ＡＳ樹脂：スチレン７５質量％、アクリロニトリル２５質量％；アセトン可溶分還元粘度０．８０
（相溶化剤）
相溶化剤−１：酸変性ＡＢＳ−１；スチレン４２質量％、アクリロニトリル１６質量％、ポリブタジエン系ゴム４０質量％、メタクリル酸２質量％；アセトン可溶分還元粘度０．６３
相溶化剤−２：酸変性ＡＢＳ−２；スチレン４０質量％、アクリロニトリル１４質量％、ポリブタジエン系ゴム４０質量％、メタクリル酸６質量％；アセトン可溶分還元粘度０．６６
相溶化剤−３：酸変性ＡＳ；スチレン７１質量％、アクリロニトリル２６質量％、メタクリル酸３質量％；アセトン可溶分還元粘度０．２４
相溶化剤−４：無水マレイン酸−フェニルマレイミド−スチレン共重合体（マレッカ ＭＳ−ＮＣ、電気化学工業（株）製）
（ガラス繊維）
マイクログラスチョップストランド ＲＥＳ０３−ＴＰ２７（エヌエスジー・ヴェトロテックス社製）

(A) Component A-1: Nylon 6 (Unitika nylon 6 A1020BRL, manufactured by Unitika Ltd.)
A-2: Nylon 6 (Unitika nylon 6 A1030BRL, manufactured by Unitika Ltd.)
Component (B) ABS resin: 45% by mass of styrene, 15% by mass of acrylonitrile, 40% by mass of polybutadiene rubber; reduced viscosity of acetone soluble component 0.50
AS resin: 75% by mass of styrene, 25% by mass of acrylonitrile; reduced viscosity of acetone soluble component 0.80
(Compatibilizer)
Compatibilizer-1: acid-modified ABS-1; styrene 42% by mass, acrylonitrile 16% by mass, polybutadiene rubber 40% by mass, methacrylic acid 2% by mass; acetone-soluble component reduced viscosity 0.63
Compatibilizer-2: acid-modified ABS-2; styrene 40% by mass, acrylonitrile 14% by mass, polybutadiene rubber 40% by mass, methacrylic acid 6% by mass; acetone-soluble component reduced viscosity 0.66
Compatibilizer-3: acid-modified AS; styrene 71% by mass, acrylonitrile 26% by mass, methacrylic acid 3% by mass; acetone-soluble component reduced viscosity 0.24
Compatibilizer-4: Maleic anhydride-phenylmaleimide-styrene copolymer (Marekka MS-NC, manufactured by Denki Kagaku Kogyo Co., Ltd.)
(Glass fiber)
Micrograss chop strand RES03-TP27 (manufactured by NSG Vetrotex)

(Vibration fatigue resistance test-2)
The test was performed using the measurement jig 200 shown in FIGS. 4A and 4B and the same vortex mixer (IMS-1000 type; manufactured by Tokyo Rika Kikai Co., Ltd.) as in the vibration fatigue resistance test-1.

  The measurement jig 200 includes a circular substrate part 201, a protruding part 202 fixed to the bottom surface of the substrate part 201, a column part 203 fixed perpendicularly from the center of the substrate part 201, and a vertical part fixed from the column part 203. A rotating arm 204 is provided. The surface of the substrate unit 201 and the rotating arm unit 204 are parallel. The substrate part 201 is formed with through holes 211, 212, and 213 for screwing to the vortex mixer.

  The test piece was obtained by injection molding the composition of Example 2 shown in Table 1 as test piece 2-1, and the composition of Comparative Example 2 shown in Table 1 was injection molded as test piece 2-2. A thing was used. The shape and dimensions of the test piece are as follows.

  A test piece 220 having a disc portion 221 and a fixing tab 222 protruding from a part of the disc portion 221 as shown in FIG. The fixing tab 222 is formed with the same screw holes (102a and 103a in FIG. 3) as those shown in FIG. The disc portion 221 has a diameter of 100 mm and a thickness of 2.0 mm, the fixing tab 222 has a length and width of 5.0 mm, a thickness of 1.4 mm, and a screw hole diameter of 2.0 mm.

  The test method is as follows. First, the measuring jig 200 was fixed to the vortex mixer with three screws. Next, in a state where the through hole 205 of the rotating arm portion 204 of the measuring jig 200 and the screwing hole of the fixing tab 222 of the test piece 220 are aligned, as shown in FIG. It was fixed using a washer 302 and a nut 303. The screw 301 has a nominal diameter of 2.0 mm and a length of 10 mm.

  In this way, the vortex mixer is rotated at 1000 r / m with the test piece 220 fixed to the rotating arm 204 of the measuring jig 200 as shown in FIG. 5A until the fixing tab 222 is broken. Was measured. As a result, the test piece 2-1 (composition of Example 2) broke the fixing tab 222 in about 10 minutes, while the test piece 2-2 (composition of Comparative Example 2) was fixed in about 1 minute. The tab 222 is broken.

1 Front fender (plate-shaped parts)
11, 21, 31, 41 Plate-shaped parts

Claims (4)

(A) It is a plate-like part made of a resin composition containing 10 to 55% by mass of a polyamide resin and 45 to 90% by mass of a styrene resin containing (B) an ABS resin and substantially not containing a fibrous filler. ,
The plate-like component has a tensile strength (ISO 527: absolute dry product) of 30 to 60 MPa,
Furthermore, the plate-shaped component is used in a state in which the plate-shaped component is fixed to the surface of the base material to which vibration is applied at one point or a plurality of points with a metal fixture.   The plate-like component according to claim 1, wherein the plate-like component is fixed to a base material to which vibration is applied only by a metal fixture without interposing a buffer member.   The plate-shaped component according to claim 1 or 2, wherein the plate-shaped component is an exterior component that is fixed to a vehicle body or other component of a motorcycle with a metal fixture.   The plate-shaped component according to any one of claims 1 to 3, wherein the metal fixture is a combination of a bolt and a nut or a screw.

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