WO2011002056A1 - ドアホールカバーおよび車両のドア構造 - Google Patents
ドアホールカバーおよび車両のドア構造 Download PDFInfo
- Publication number
- WO2011002056A1 WO2011002056A1 PCT/JP2010/061247 JP2010061247W WO2011002056A1 WO 2011002056 A1 WO2011002056 A1 WO 2011002056A1 JP 2010061247 W JP2010061247 W JP 2010061247W WO 2011002056 A1 WO2011002056 A1 WO 2011002056A1
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- WIPO (PCT)
- Prior art keywords
- door
- hole cover
- door hole
- base material
- inner panel
- Prior art date
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
- B60R13/02—Internal Trim mouldings ; Internal Ledges; Wall liners for passenger compartments; Roof liners
- B60R13/0237—Side or rear panels
- B60R13/0243—Doors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
- B60J5/00—Doors
- B60J5/04—Doors arranged at the vehicle sides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
- B60R13/08—Insulating elements, e.g. for sound insulation
- B60R13/0815—Acoustic or thermal insulation of passenger compartments
Definitions
- the present invention relates to a door hole cover and a vehicle door structure, and more particularly to a door hole cover for covering an opening of a vehicle door inner panel and a vehicle door structure including the door hole cover.
- an opening for work is formed in a door inner panel, and a door hole cover that covers the opening is provided in order to prevent water from entering through the opening.
- the door hole cover itself vibrates such as flapping noise or chatter noise (abnormal noise) due to vibration of the door inner panel or air vibration caused by vibration of the vehicle body or door speaker. Is generated.
- a foam rubber material mainly composed of EPDM is formed on the surface of the facing portion facing the opening in the door hole cover. It has been proposed to partially laminate the vibration damping material (see, for example, Patent Document 2 below). JP 2007-290684 A JP 2008-12993 A
- Patent Document 1 has a problem that vibration noise is generated in a portion having low rigidity other than the bead forming portion.
- Patent Document 1 requires a bead forming position corresponding to the shape and position of various automobile openings, and further requires a separate molding process for forming the bead. Therefore, there is a problem that it is complicated and very time-consuming and the cost increases.
- the door hole cover of Patent Document 2 has a problem that even if the interference sound with the door inner panel can be suppressed, the vibration sound (abnormal noise) directly generated from the door hole cover cannot be suppressed. is there.
- An object of the present invention is to provide a door hole cover and a vehicle door structure capable of reliably suppressing vibration noise of the door hole cover easily and at low cost.
- a door hole cover of the present invention is a door hole cover that is attached to a door inner panel of a vehicle and covers an opening formed in the door inner panel, and has a frequency of 150 Hz or less.
- the average value of the loss coefficient is 0.085 or more.
- the door hole cover of the present invention preferably includes a base material made of polypropylene resin and a viscoelastic layer laminated on at least one side of the base material.
- the polypropylene resin is an unstretched polypropylene resin.
- the viscoelastic layer is made of a rubber composition, and it is preferable that the rubber composition is made of acrylic rubber.
- the viscoelastic layer is made of an acrylic pressure-sensitive adhesive composition.
- the vehicle door structure of the present invention includes a door inner panel in which an opening is formed, and the door hole cover that is attached to the door inner panel so as to cover the opening. It is characterized by.
- the door hole cover of the present invention and the door structure of a vehicle including the door hole cover, the door hole cover itself has vibration damping properties, so that the vibration noise of the door hole cover can be reliably suppressed.
- the door hole cover itself has vibration damping properties, it is possible to eliminate the need for optimization of the bead formation position and the bead molding process according to the opening of the door inner panel. Therefore, the vibration sound of the door hole cover can be easily suppressed at low cost.
- Sectional drawing of one Embodiment (The aspect which is a 3 layer laminated structure) of the door hole cover of this invention is shown.
- the front view of one Embodiment of the door structure of this invention with which the door hole cover shown in FIG. 1 was attached is shown.
- Sectional drawing of other embodiment (the aspect which is 5 layer laminated structure) of the door hole cover of this invention is shown.
- Sectional drawing of other embodiment (the aspect which is 1 layer structure) of the door hole cover of this invention is shown.
- the schematic for demonstrating the evaluation method of the vibration sound in an Example is shown.
- FIG. 1 is a cross-sectional view of an embodiment of a door hole cover of the present invention (an embodiment having a three-layer laminated structure), and FIG. 2 is a view of one of the door structures of the present invention to which the door hole cover shown in FIG. The front view of an embodiment is shown.
- this door hole cover 1 is attached to a door inner panel 2 of an automobile as a vehicle and covers a work hole 3 as an opening formed in the door inner panel 2. (Alternatively, it is called a sealing screen or a hole seal.)
- the door hole cover 1 has, for example, a flat sheet shape, and as shown in FIG. 1, a first base material 5 as a base material, a viscoelastic layer (first viscoelasticity layer) laminated on the surface of the first base material 5. Layer) 6 and a second base material 7 as a base material laminated on the surface of the viscoelastic layer 6.
- the first substrate 5 is formed, for example, as a synthetic resin film, and examples of the synthetic resin material that forms such a synthetic resin film include polypropylene resins, polyethylene resins, and copolymers of these monomers. Examples thereof include polyolefin resins such as resins. Examples of the synthetic resin material include polyurethane resin, polyvinyl chloride resin, and polyamide resin.
- the synthetic resin material is preferably a polyolefin resin.
- the polypropylene resin is a polymer of a monomer component containing propylene as a main component.
- polypropylene homopolypropylene
- a copolymer of propylene and one or more other ⁇ -olefins propylene and 1
- examples thereof include copolymers with seeds or two or more (meth) acrylic acid esters, and mixtures thereof.
- polypropylene resins are classified into a stretch type (OPP) that is stretched during production and a non-stretch type (CPP) that is not stretched during production.
- OPP stretch type
- CPP non-stretch type
- the polyethylene resin is a polymer of a monomer component containing ethylene as a main component, for example, polyethylene (homopolyethylene, for example, high density polyethylene, medium density polyethylene, low density polyethylene (specifically, linear low Density polyethylene, branched low-density polyethylene, etc.), ultra-low-density polyethylene, etc.), copolymers of ethylene and one or more other ⁇ -olefins (excluding propylene), ethylene and one or two types Examples thereof include copolymers with the above (meth) acrylic acid esters (for example, ethylene / ethyl acrylate copolymers), ethylene / vinyl acetate copolymers, and the like.
- polyethylene homopolyethylene, for example, high density polyethylene, medium density polyethylene, low density polyethylene (specifically, linear low Density polyethylene, branched low-density polyethylene, etc.), ultra-low-density polyethylene, etc.
- the copolymer resin is an olefin copolymer, and specifically includes an ethylene / propylene copolymer, and more specifically, a random or block copolymer of ethylene and propylene.
- the synthetic resin material is more preferably a polypropylene resin, and even more preferably a non-stretched type (CPP) polypropylene resin.
- CPP non-stretched type
- the flow direction of the synthetic resin material (the direction in which the synthetic resin material flows during molding, hereinafter may be referred to as the MD direction) and the width direction (depending on the extension direction).
- the direction perpendicular to the flow direction hereinafter referred to as the TD direction, may be different from each other in breaking strength and vibration characteristics. Therefore, when processing the door hole cover 1 into a specific shape, it is necessary to process it in consideration of the extending direction.
- the synthetic resin material is an unstretched type (CPP) polypropylene resin
- the breaking strength and the vibration characteristics can be made constant regardless of the shape of the door hole cover 1.
- the first base material 5 can be formed as, for example, a metal foil, a nonwoven fabric, or a woven cloth (cloth).
- the thickness of the first base material 5 is appropriately selected so that the average value DF (described later) of the loss coefficient of the door hole cover 1 is within a desired range, for example, 0.01 to 0.5 mm, preferably 0. 0.02 to 0.2 mm, and more preferably 0.03 to 0.1 mm.
- the viscoelastic layer 6 is formed on the entire surface of the first substrate 5.
- Examples of the viscoelastic material forming the viscoelastic layer 6 include a rubber composition.
- rubber compositions include acrylic rubber, silicone rubber, urethane rubber, vinyl alkyl ether rubber, polyvinyl alcohol rubber, polyvinyl pyrrolidone rubber, polyacrylamide rubber, cellulose rubber, natural rubber, butadiene rubber, chloroprene rubber, and styrene / butadiene rubber.
- acrylic rubber is preferably used from the viewpoint of forming a laminated structure with the first base material 5 and the second base material 7 and increasing the average value DF of the loss coefficient of the door hole cover 1.
- the acrylic rubber is a polymer of a monomer component containing, as a main component, a (meth) acrylic acid alkyl ester such as methyl (meth) acrylate or butyl (meth) acrylate.
- the rubber composition is preferably butyl rubber.
- butyl rubber is a synthetic rubber obtained by random or block copolymerization of isobutene (isobutylene) and isoprene.
- the degree of unsaturation of butyl rubber is, for example, 0.8 to 2.2, preferably 1.0 to 2.0.
- examples of the viscoelastic material forming the viscoelastic layer 6 include an acrylic pressure-sensitive adhesive composition.
- the acrylic pressure-sensitive adhesive composition contains an acrylic polymer.
- the acrylic polymer contains 50% by mass or more of a (meth) acrylic acid alkyl ester having an alkyl group having 4 or more carbon atoms, and less than 50% by mass of a copolymerizable monomer copolymerizable with an alkyl (meth) acrylate (that is, an alkyl group). It is obtained by polymerizing a monomer composition containing (the remainder of (meth) acrylate).
- (meth) acrylic acid alkyl ester (methacrylic acid alkyl ester or acrylic acid alkyl ester) having an alkyl group having 4 or more carbon atoms
- examples include butyl (meth) acrylate, pentyl (meth) acrylate,
- examples include (meth) acrylic acid alkyl ester monomers having an alkyl group having 4 to 8 carbon atoms, such as hexyl (meth) acrylate, octyl (meth) acrylate, and 2-ethylhexyl (meth) acrylate.
- a carboxyl group-containing monomer such as (meth) acrylic acid
- a hydroxyl group-containing monomer such as 2-hydroxyethyl (meth) acrylate
- (meth) acrylamide examples include amide group-containing monomers such as (meth) acryl group-containing silane coupling agents such as ⁇ -acryloxypropyltrimethoxysilane.
- a carboxyl group-containing monomer and a (meth) acryl group-containing silane coupling agent are used.
- the method for polymerizing the monomer composition is not particularly limited, and examples thereof include known polymerization methods such as solution polymerization, bulk polymerization, emulsion polymerization, and various radical polymerizations, and preferably emulsion polymerization.
- the obtained acrylic polymer may be, for example, a random copolymer, a block copolymer, or a graft copolymer.
- the acrylic pressure-sensitive adhesive composition contains known additives such as a crosslinking agent and a tackifier, if necessary.
- the dosage form of the acrylic pressure-sensitive adhesive composition is preferably a solventless emulsion type or a hot melt type. If the acrylic pressure-sensitive adhesive composition is the above-described dosage form, it can be suitably used as an automobile interior material.
- the thickness of the viscoelastic layer 6 thus formed is appropriately selected so that the average value DF of the loss coefficient of the door hole cover 1 is within a desired range, for example, 0.01 to 1 mm, preferably The thickness is 0.01 to 0.6 mm, more preferably 0.02 to 0.4 mm.
- the second base material 7 is formed on the entire surface of the viscoelastic layer 6 and sandwiches the viscoelastic layer 6 together with the first base material 5 in the thickness direction.
- Examples of the material for forming the second base material 7 include the same materials as those for forming the first base material 5.
- the thickness of the second base material 7 is the same as that of the first base material 5.
- the thickness of the door hole cover 1 is, for example, 0.02 to 4 mm. From the viewpoint of followability with respect to the door inner panel 2, it is preferably 0.03 to 0.8 mm, and more preferably 0.05 to 0.00 mm. 6 mm.
- a polypropylene resin as a material for the first base material 5 and the second base material 7 and a material for the viscoelastic layer 6 are used.
- a combination with acrylic rubber is used.
- the door hole cover 1 has an average loss factor DF of 0.085 or more, preferably 0.095 or more, and more preferably 0.095 or more, more preferably 0.095 or more, more preferably at a room temperature of a frequency of 150 Hz or less (more specifically, a frequency range of 20 to 150 Hz). , 0.100 or more, and usually 2.000 or less. Furthermore, the average value DF of the loss coefficient of the frequency of 150 Hz or less at normal temperature of the door hole cover 1 is preferably set to 0.120 or more, more preferably 0.150 or more, for example, 1.500 or less. it can.
- the above-mentioned normal temperature is, for example, a temperature range of 20 to 25 ° C., specifically 23 ° C.
- the average value DF of the loss coefficient can be calculated for the door hole cover 1 from the measurement method described in the examples described later.
- the average value DF of the loss coefficient is calculated from the measurement method (method using the frequency response function) described in the embodiment. Difficult to do. In that case, an average value DF of a loss coefficient having a frequency of 150 Hz or less can be calculated using a viscoelastic spectrometer.
- Preferred combinations of the materials and thicknesses of the first base material 5, the viscoelastic layer 6 and the second base material 7 for setting the loss factor (frequency 150 Hz or less) DF of the door hole cover 1 in the above-described range are as follows. It is illustrated in
- the left-right direction on the paper surface is “front-rear direction”
- the up-down direction on the paper surface is “up-down direction”
- the paper thickness direction is “vehicle width direction”.
- the door structure 10 includes a door inner panel 2 and a door hole cover 1 attached to the door inner panel 2.
- the door inner panel 2 is formed in an outer shape corresponding to a front door of an automobile, and is made of a metal plate such as a steel plate, for example. This door inner panel 2 constitutes a front door of an automobile together with a door outer panel (not shown).
- the door inner panel 2 has a window frame in which the front side window is fitted so as to be movable up and down in the upper part, and a speaker hole 4 and a work hole 3 as an opening are formed in the lower part. .
- the speaker hole 4 is formed to accommodate the door speaker 8, and is formed in, for example, a substantially circular shape on the lower side of the front side of the door inner panel 2.
- the work hole 3 is provided behind the speaker hole 4 with one or a plurality (for example, two) at intervals.
- the work holes 3 are opposed to each other in the front-rear direction with a space therebetween, and are formed in a substantially rectangular shape in front view that is slightly longer in the up-down direction.
- the work hole 3 in the vicinity of the speaker hole 4 has its upper end slightly protruding forward, so that the front end of the work hole 3 is in the middle in the vertical direction.
- a step portion corresponding to the speaker hole 4 is formed.
- the door hole cover 1 is specifically processed (cut) into a substantially rectangular shape in front view extending in the front-rear direction and covering the two work holes 3 together.
- the length in the front-rear direction of the door hole cover 1 is, for example, 480 mm.
- the vertical length of the door hole cover 1 is, for example, 550 mm.
- the door hole cover 1 exposes the speaker hole 4 and has an upper end protruding forward so as to correspond to the front end of the work hole 3.
- the door hole cover 1 described above is prepared.
- the sheet-shaped door hole cover 1 is exposed so that the speaker hole 4 is exposed, the two work holes 3 are covered, and the work holes 3 are continuous.
- the outer shape is cut (cut) into the shape.
- the adhesive tape 15 is laminated on the peripheral edge of the back surface of the door hole cover 1.
- the adhesive tape 15 has a narrow tape shape, and is continuously arranged along the peripheral edge of the back surface of the first base material 5 of the door hole cover 1.
- the pressure-sensitive adhesive composition forming the pressure-sensitive adhesive tape 15 is not particularly limited, and examples thereof include the butyl rubber described above.
- the thickness of the adhesive tape 15 is, for example, 0.01 to 5 mm.
- the door hole cover 1 is attached via an adhesive tape 15 so as to cover the two work holes 3 together on one side surface (inner side surface) of the door inner panel 2 in the vehicle width direction.
- the door speaker 8 is accommodated in the speaker hole 4 and the door speaker 8 is attached to the door inner panel 2.
- the door speaker 8 is electrically connected to the generator 14 via the wiring 25.
- the door hole cover 1 itself has vibration damping properties, the optimization of the bead formation position and the bead forming process corresponding to the work hole 3 of the door inner panel 2 as in Patent Document 1 are not required. it can.
- the vibration sound of the door hole cover 1 can be easily suppressed at low cost.
- the door hole cover 1 has flexibility.
- the unevenness formed on the door inner panel 2 can be followed.
- the door hole cover 1 has excellent transparency when the first base material 5 and the second base material 7 are made of a polyolefin resin and the viscoelastic layer 6 is made of an acrylic rubber or an acrylic pressure-sensitive adhesive composition. have. Therefore, the adhesive tape 15 on the back surface of the door hole cover 1 can be reliably aligned with the door inner panel 2.
- the door hole cover 1 has excellent mechanical strength, heat resistance, water resistance and weather resistance equivalent to a door hole cover made of only a polyethylene resin film.
- acoustic performance for example, sound absorption property, sound insulation property, etc.
- a door A sound absorbing layer, a sound insulating material, or the like can be laminated on the front surface and / or the back surface of the hole cover 1.
- the door hole cover 1 can be formed as a two-layer laminated structure including the first base material 5 and the viscoelastic layer 6 without providing the second base material 7.
- FIG. 3 is a cross-sectional view of another embodiment of the door hole cover of the present invention (an aspect having a five-layer laminated structure), and FIG. 4 is another embodiment of the door hole cover of the present invention (an aspect having a one-layer structure). ) Is a cross-sectional view.
- the same referential mark is attached
- the door hole cover 1 is formed as a three-layer (laminated) structure.
- the door hole cover 1 is formed as a five-layer (laminated) structure. It can also be formed.
- a second viscoelastic layer 16 as a viscoelastic layer is laminated on the surface of the second base material 7, and a third base material 17 as a base material is laminated on the surface.
- the viscoelastic material forming the second viscoelastic layer 16 is the same as the viscoelastic material forming the first viscoelastic layer 6.
- the thickness of the second viscoelastic layer 16 is the same as the thickness of the first viscoelastic layer 6.
- the material for forming the third base material 17 is the same as the material for forming the first base material 5.
- the thickness of the third base material 17 is the same as the thickness of the first base material 5.
- Preferred combinations of materials and thicknesses of the 16 and the third substrate 17 are exemplified below.
- Preferred materials and thicknesses of the first base material 5 for setting the average value DF of the loss coefficient (frequency of 150 Hz or less) of the door hole cover 1 in the above range are exemplified below.
- the door hole cover 1 is formed as a multilayer structure having two or more layers.
- the average value DF of the loss coefficient of the door hole cover 1 is reliably increased as compared with the case where it is formed as a single layer structure. Can be set.
- the monomer composition was added dropwise over 3 hours while maintaining the internal temperature of the reaction vessel at 60 ° C.
- the mixture was aged for 3 hours while maintaining the internal temperature. Thereafter, 0.1 part by mass of ascorbic acid and 0.1 part by mass of hydrogen peroxide (35%) are added to the reaction vessel, cooled to room temperature, and an acrylic polymer in which an acrylic polymer is dispersed in water. An emulsion (solid content: 56% by mass) was obtained.
- Polymerized rosin resin (tackifier, trade name: Superester E-865NT, softening point: 160 ° C., solid content: 50 with respect to 100 parts by mass of the solid content of the acrylic polymer emulsion (that is, acrylic polymer)
- the polymerized rosin resin was added to the acrylic polymer emulsion so that 20 parts by mass of a solid content (mass%, manufactured by Arakawa Chemical Industries, Ltd.) was added.
- the measuring device is composed of a loss factor measuring device (20) including a clamp (11) and a laser Doppler vibrometer system (21).
- the laser Doppler vibrometer system (21) includes an electromagnetic exciter (13) provided below the clamp (11) with an interval at which the test piece (18) hangs down, and the length of the test piece (18) that hangs down.
- a vibration meter (22) provided at intervals in the middle of the direction is provided, and an electromagnetic exciter (13) and a signal processing device (23) connected to the vibration meter (22).
- the signal processing device (23) is composed of an FFT analyzer (model number “CF-5220”, manufactured by Ono Sokki Co., Ltd.).
- the door hole covers (1) of Examples 1 to 9 and Comparative Examples 1 and 2 were each cut into a size of 5 mm wide by 50 mm long to obtain a test piece (18).
- the electromagnetic exciter (13) vibrates the iron piece (12) with the excitation signal (swept sine wave) output from the signal processing device (23), and the vibrometer (22)
- the laser Doppler vibrometer system (21) was operated so that the vibration in the longitudinal direction of 18) was detected and a vibration (detection) signal was input to the signal processing device (23).
- the frequency response function was calculated based on the vibration signal output to the electromagnetic vibrator (13) and the vibration signal input from the vibration meter (22). From this frequency response function, the average value DF of the loss coefficient at a frequency of 150 Hz or less (20 to 150 Hz) was calculated by curve fitting the resonance peak shape.
- a 45-Hz sine wave signal is reproduced from the door speaker (8), and the door hole cover Vibration sound (abnormal sound) generated from (1) is measured with a microphone (model number “Type4190”, manufactured by Bruel & Kjaer), and frequency analysis is performed with analyzer software (model number “Artems”, manufactured by HEAD Acoustics). did.
- the noise level (sound pressure level of the sound pressure level) including the vibration sound is measured.
- a partial overall value of (A characteristic correction) was calculated.
- the frequency of the sine wave signal reproduced from the door speaker (8) was selected as follows.
- the door hole cover (1) normally generates a vibration noise (abnormal noise), that is, the natural vibration of the door inner panel (2). It is necessary to reproduce a sine wave signal having a frequency close to a number from the door speaker (8). Since the natural frequency of the door inner panel (2) varies depending on the shape and material of the door inner panel (2), a sine wave signal was continuously reproduced in a frequency range of 20 to 150 Hz. Then, 45 Hz was selected as a frequency at which the door inner panel (2) greatly vibrates (excited vibration) and the door hole cover (1) easily generates vibration noise.
- a vibration noise abnormal noise
- Example 3 vibration sound was also measured in the same manner as described above for the door structure (10) in which the door hole cover (1) was not provided. 3.
- Examples and Comparative Examples Example 1 A first base material having a thickness of 0.07 mm made of a lateral uniaxially stretched polypropylene film, a viscoelastic layer having a thickness of 0.028 mm made of acrylic rubber, and a second base material having a thickness of 0.06 mm made of a biaxially stretched polypropylene film are sequentially provided. By laminating, a door hole cover having a three-layer laminated structure with a thickness of 0.158 mm was produced (see FIG. 1).
- the door hole cover was cut into a substantially rectangular shape in front view with the upper end protruding forward.
- the width direction (TD direction) of the door hole cover was adjusted along the vertical direction.
- an adhesive tape made of butyl rubber and having a thickness of 5 mm was continuously laminated on the peripheral end of the back surface (the back surface of the first base material).
- the speaker hole was exposed on the inner side surface of the door inner panel, and the door hole cover was attached with adhesive tape so as to cover the two work holes.
- the door hole cover was attached to the door inner panel (see FIG. 2).
- Example 2 A door hole cover having a single layer structure (single layer) was prepared only from a first base material having a thickness of 0.10 mm made of a polypropylene film (see FIG. 4).
- Example 3 Three-layer lamination was performed in the same manner as in Example 1 except that a 0.09 mm thick second substrate made of polyethylene resin was used instead of the 0.06 mm thick second substrate made of a biaxially stretched polypropylene film. A door hole cover having a structure thickness of 0.188 mm was produced (see FIG. 1), and then the door hole cover was attached to the door inner panel (see FIG. 2).
- Example 4 Instead of a 0.07 mm thick first substrate made of a lateral uniaxially stretched polypropylene film, a 0.06 mm thick first substrate made of a biaxially stretched polypropylene film was used, and a 0.06 mm thick made of polypropylene resin.
- a door hole cover having a three-layer laminated structure of 0.178 mm was produced in the same manner as in Example 1 except that a second substrate made of polyethylene resin and having a thickness of 0.09 mm was used instead of the second substrate. Next, the door hole cover was attached to the door inner panel (see FIG. 2).
- Example 5 Instead of the first base material having a thickness of 0.07 mm made of a laterally uniaxially stretched polypropylene film, except that a first base material having a thickness of 0.06 mm made of a biaxially stretched polypropylene film was used, the same as in Example 1, A door hole cover having a three-layer laminated structure with a thickness of 0.148 mm was produced (see FIG. 1), and then the door hole cover was attached to the door inner panel (see FIG. 2).
- Example 6 In the cut of the door hole cover, when the door hole cover was attached to the door, the flow direction (MD direction) of the door hole cover was adjusted so as to be along the vertical direction. A door hole cover having a layer stack structure of 0.148 mm in thickness was produced (see FIG. 1), and then the door hole cover was attached to the door inner panel (see FIG. 2).
- Example 7 Instead of the viscoelastic layer made of acrylic rubber having a thickness of 0.028 mm, a viscoelastic layer having a thickness of 0.100 mm made of the acrylic pressure-sensitive adhesive composition prepared above was used in the same manner as in Example 5, A door hole cover having a three-layer laminated structure with a thickness of 0.220 mm was manufactured (see FIG. 1), and then the door hole cover was attached to the door inner panel (see FIG. 2).
- Example 8 Instead of the first base material and the second base material made of biaxially stretched polypropylene having a thickness of 0.06 mm, except for using the first base material and the second base material made of an unstretched polypropylene film having a thickness of 0.06 mm, In the same manner as in Example 7, a door hole cover having a three-layer laminated structure with a thickness of 0.220 mm was manufactured (see FIG. 1), and then the door hole cover was attached to the door inner panel (see FIG. 2).
- Example 9 In the cut of the door hole cover, when the door hole cover was attached to the door, the flow direction (MD direction) of the door hole cover was adjusted so as to be along the vertical direction. A door hole cover having a layered structure of 0.220 mm in thickness was produced (see FIG. 1), and then the door hole cover was attached to the door inner panel (see FIG. 2).
- Comparative Example 1 One layer is formed in the same manner as in Example 2 except that a first base material (commercial product) made of polyethylene resin and having a thickness of 0.09 mm is used instead of the first base material made of polypropylene resin and having a thickness of 0.10 mm.
- a door hole cover having a (single layer) structure was prepared (see FIG. 4), and then the door hole cover was attached to the door inner panel (see FIG. 2).
- Comparative Example 2 One layer (single layer) in the same manner as in Example 2 except that the first base material made of polypropylene resin and having a thickness of 0.07 mm was used instead of the first base material made of polypropylene resin and having a thickness of 0.10 mm. A door hole cover having a structure was prepared (see FIG. 4), and then the door hole cover was attached to the door inner panel (see FIG. 2).
- the door hole cover and the vehicle door structure of the present invention are used to cover the opening of the vehicle door inner panel.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
- Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
- Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
Abstract
Description
第1基材5 材料:ポリプロピレン樹脂 厚み0.01~0.5mm
粘弾性層6 材料:アクリルゴム 厚み0.01~1mm
第2基材7 材料:ポリプロピレン樹脂 厚み0.01~0.5mm
<組合せ2>
第1基材5 材料:ポリプロピレン樹脂 厚み0.01~0.5mm
粘弾性層6 材料:アクリルゴム 厚み0.01~1mm
第2基材7 材料:ポリエチレン樹脂 厚み0.01~0.5mm
<組合せ3>
第1基材5 材料:ポリプロピレン樹脂 厚み0.01~0.5mm
粘弾性層6 材料:ブチルゴム 厚み0.01~1mm
第2基材7 材料:ポリプロピレン樹脂 厚み0.01~0.5mm
<組合せ4>
第1基材5 材料:ポリプロピレン樹脂 厚み0.01~0.5mm
粘弾性層6 材料:アクリル系粘着剤組成物 厚み0.01~1mm
第2基材7 材料:ポリプロピレン樹脂 厚み0.01~0.5mm
このドアホールカバー1を作製するには、まず、第1基材5を用意し、その表面に粘弾性層6を、塗布によって積層し、次いで、粘弾性層6の表面に第2基材7を積層する。
第1基材5 材料:ポリプロピレン樹脂 厚み0.01~0.5mm
第1粘弾性層6 材料:アクリルゴム 厚み0.01~1mm
第2基材7 材料:ポリプロピレン樹脂 厚み0.01~0.5mm
第2粘弾性層16 材料:アクリルゴム 厚み0.01~1mm
第3基材17 材料:ポリプロピレン樹脂 厚み0.01~0.5mm
<組合せ6>
第1基材5 材料:ポリプロピレン樹脂 厚み0.01~0.5mm
第1粘弾性層6 材料:アクリル系粘着剤組成物 厚み0.01~1mm
第2基材7 材料:ポリプロピレン樹脂 厚み0.01~0.5mm
第2粘弾性層16 材料:アクリル系粘着剤組成物 厚み0.01~1mm
第3基材17 材料:ポリプロピレン樹脂 厚み0.01~0.5mm
また、図4に示すように、粘弾性層6および第2基材7を形成することなく、ドアホールカバー1を第1基材5のみから1層(単層)構造として形成することもできる。
・材料:ポリプロピレン樹脂 厚み0.03~1mm
・材料:ポリエチレン樹脂 厚み0.1~1mm
好ましくは、ドアホールカバー1を2層以上の複層積層構造として形成する。ドアホールカバー1を複層積層構造として形成することにより、単層構造として形成する場合に比べて、ドアホールカバー1の損失係数の平均値DFを確実に増大させて、上記した範囲に確実に設定することができる。
1.アクリル系粘着剤組成物の調製
冷却管、窒素導入管、温度計および攪拌機を備えた反応容器に、2,2’-アゾビス[N-(2-カルボキシルエチル)-2-メチル-プロピオンアミジン](重合開始剤、商品名:VA-057、和光純薬社製)0.1質量部およびイオン交換水35質量部を投入し、窒素ガスを導入しながら1時間攪拌した。
2.評価方法
(1) 損失係数の測定
図5に示すように、測定装置は、クランプ(11)と、レーザードップラー振動計システム(21)とを備える損失係数測定装置(20)からなる。
(2) 振動音の評価
実施例1~9、比較例1および2のドア構造(10)(図2参照)において、45Hzの正弦波信号をドアスピーカ(8)から再生して、ドアホールカバー(1)から発生する振動音(異音)を、マイクロフォン(型番「Type4190」、Bruel&Kjaer社製)にてそれぞれ計測して、アナライザソフト(型番「Artems」、HEAD Acoustics社製)にてそれぞれ周波数分析した。
3.各実施例および各比較例
実施例1
横一軸延伸ポリプロピレンフィルムからなる厚み0.07mmの第1基材、アクリルゴムからなる厚み0.028mmの粘弾性層、および、二軸延伸ポリプロピレンフィルムからなる厚み0.06mmの第2基材を順次積層することにより、3層積層構造の厚み0.158mmのドアホールカバーを作製した(図1参照)。
ポリプロピレンフィルムからなる厚み0.10mmの第1基材のみから、1層(単層)構造のドアホールカバーを用意した(図4参照)。
二軸延伸ポリプロピレンフィルムからなる厚み0.06mmの第2基材に代えて、ポリエチレン樹脂からなる厚み0.09mmの第2基材を用いた以外は、実施例1と同様にして、3層積層構造の厚み0.188mmのドアホールカバーを作製し(図1参照)、続いて、ドアホールカバーをドアインナパネルに取り付けた(図2参照)。
横一軸延伸ポリプロピレンフィルムからなる厚み0.07mmの第1基材に代えて、二軸延伸ポリプロピレンフィルムからなる厚み0.06mmの第1基材を用い、また、ポリプロピレン樹脂からなる厚み0.06mmの第2基材に代えて、ポリエチレン樹脂からなる厚み0.09mmの第2基材を用いた以外は、実施例1と同様にして、3層積層構造の厚み0.178mmのドアホールカバーを作製し(図1参照)、続いて、ドアホールカバーをドアインナパネルに取り付けた(図2参照)。
横一軸延伸ポリプロピレンフィルムからなる厚み0.07mmの第1基材に代えて、二軸延伸ポリプロピレンフィルムからなる厚み0.06mmの第1基材を用いた以外は、実施例1と同様にして、3層積層構造の厚み0.148mmのドアホールカバーを作製し(図1参照)、続いて、ドアホールカバーをドアインナパネルに取り付けた(図2参照)。
ドアホールカバーのカットにおいて、ドアホールカバーをドアに取り付けたときに、ドアホールカバーの流れ方向(MD方向)が、上下方向に沿うように調整した以外は、実施例5と同様にして、3層積層構造の厚み0.148mmのドアホールカバーを作製し(図1参照)、続いて、ドアホールカバーをドアインナパネルに取り付けた(図2参照)。
アクリルゴムからなる厚み0.028mmの粘弾性層に代えて、上記で調製したアクリル系粘着剤組成物からなる厚み0.100mmの粘弾性層を用いた以外は、実施例5と同様にして、3層積層構造の厚み0.220mmのドアホールカバーを作製し(図1参照)、続いて、ドアホールカバーをドアインナパネルに取り付けた(図2参照)。
二軸延伸ポリプロピレンからなる厚み0.06mmの第1基材および第2基材に代えて、無延伸ポリプロピレンフィルムからなる厚み0.06mmの第1基材および第2基材を用いた以外は、実施例7と同様にして、3層積層構造の厚み0.220mmのドアホールカバーを作製し(図1参照)、続いて、ドアホールカバーをドアインナパネルに取り付けた(図2参照)。
ドアホールカバーのカットにおいて、ドアホールカバーをドアに取り付けたときに、ドアホールカバーの流れ方向(MD方向)が、上下方向に沿うように調整した以外は、実施例8と同様にして、3層積層構造の厚み0.220mmのドアホールカバーを作製し(図1参照)、続いて、ドアホールカバーをドアインナパネルに取り付けた(図2参照)。
ポリプロピレン樹脂からなる厚み0.10mmの第1基材に代えて、ポリエチレン樹脂からなる厚み0.09mmの第1基材(市販品)を用いた以外は、実施例2と同様にして、1層(単層)構造のドアホールカバーを用意し(図4参照)、続いて、ドアホールカバーをドアインナパネルに取り付けた(図2参照)。
ポリプロピレン樹脂からなる厚み0.10mmの第1基材に代えて、ポリプロピレン樹脂からなる厚み0.07mmの第1基材を用いた以外は、実施例2と同様にして、1層(単層)構造のドアホールカバーを用意し(図4参照)、続いて、ドアホールカバーをドアインナパネルに取り付けた(図2参照)。
*2:ポリプロピレンフィルム(商品名:P-3300、クラボウ社製)
*3:二軸延伸ポリプロピレンフィルム(商品名:トレファン BO2548、東レ社製、破断強度(MD):140MPa、破断強度(TD):300MPa)
*4:無延伸ポリプロピレンフィルム(商品名:アロマーET20、オカモト社製)
*5:ポリエチレン樹脂フィルム(材料:低密度ポリエチレン、商品名「ノバテックLL」、日本ポリエチレン社製)
なお、上記発明は、本発明の実施形態の例示として提供したが、これは単なる例示にすぎず、限定的に解釈してはならない。当該技術分野の当業者によって明らかな本発明の変形例は、後記特許請求の範囲に含まれるものである。
Claims (7)
- 車両のドアインナパネルに取り付けられ、前記ドアインナパネルに形成された開口部を被覆するためのドアホールカバーであって、
周波数150Hz以下の損失係数の平均値が、0.085以上であることを特徴とする、ドアホールカバー。 - ポリプロピレン樹脂からなる基材と、
前記基材の少なくとも片面に積層される粘弾性層と
を備えることを特徴とする、請求項1に記載のドアホールカバー。 - 前記ポリプロピレン樹脂が、無延伸のポリプロピレン樹脂であることを特徴とする、請求項2に記載のドアホールカバー。
- 前記粘弾性層が、ゴム組成物からなることを特徴とする、請求項2に記載のドアホールカバー。
- 前記ゴム組成物が、アクリルゴムからなることを特徴とする、請求項4に記載のドアホールカバー。
- 前記粘弾性層が、アクリル系粘着剤組成物からなることを特徴とする、請求項2に記載のドアホールカバー。
- 開口部が形成されたドアインナパネルと、
前記ドアインナパネルに、前記開口部を被覆するように取り付けられ、周波数150Hz以下の損失係数の平均値が、0.085以上であるドアホールカバーと
を備えていることを特徴とする、車両のドア構造。
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US13/381,805 US8534738B2 (en) | 2009-07-03 | 2010-07-01 | Door hole cover and vehicular door structure |
CN201080028538.3A CN102470733B (zh) | 2009-07-03 | 2010-07-01 | 车门孔罩和车辆的车门结构 |
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JP2010143025A JP5441833B2 (ja) | 2009-07-03 | 2010-06-23 | ドアホールカバーおよび車両のドア構造 |
JP2010-143025 | 2010-06-23 |
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JP (1) | JP5441833B2 (ja) |
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MX2018015232A (es) * | 2016-06-10 | 2019-04-25 | Fiero Paul | Parches de capa restringida de butilo de densidad baja y ultrabaja. |
JP6818490B2 (ja) * | 2016-10-03 | 2021-01-20 | 西川ゴム工業株式会社 | 自動車用ドアホールシール材 |
EP3335872A1 (en) * | 2016-12-16 | 2018-06-20 | Amcor Flexibles Winterbourne Limited | Polymeric films and packages produced therefrom |
JP7403349B2 (ja) | 2020-02-26 | 2023-12-22 | 西川ゴム工業株式会社 | ドアホールシール |
JP7375725B2 (ja) * | 2020-10-19 | 2023-11-08 | 株式会社オートネットワーク技術研究所 | ドア用配線モジュール |
JP7331819B2 (ja) * | 2020-10-20 | 2023-08-23 | 株式会社オートネットワーク技術研究所 | ドア用配線モジュール、サービスホールカバー及びドア用配線モジュールの製造方法 |
JP2022088858A (ja) * | 2020-12-03 | 2022-06-15 | 本田技研工業株式会社 | 車両用ドアの内装構造体 |
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2010
- 2010-06-23 JP JP2010143025A patent/JP5441833B2/ja not_active Expired - Fee Related
- 2010-07-01 WO PCT/JP2010/061247 patent/WO2011002056A1/ja active Application Filing
- 2010-07-01 CN CN201080028538.3A patent/CN102470733B/zh not_active Expired - Fee Related
- 2010-07-01 US US13/381,805 patent/US8534738B2/en not_active Expired - Fee Related
- 2010-07-01 CN CN201410141226.3A patent/CN103935305A/zh active Pending
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CN103935305A (zh) | 2014-07-23 |
JP2011025915A (ja) | 2011-02-10 |
CN102470733A (zh) | 2012-05-23 |
CN102470733B (zh) | 2014-05-14 |
JP5441833B2 (ja) | 2014-03-12 |
US20120169083A1 (en) | 2012-07-05 |
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