JP2008087507A - Sealant member for weatherstrip - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sealant member for a weatherstrip with a strong force for holding a flange and capable of facilitating reassembling. <P>SOLUTION: In this sealant member 70 used for the weatherstrip 10 sealing a gap between a body opening opening/closing member of an automobile and the body opening peripheral edge of the automobile, the weatherstrip 10 is configured to comprise a mounting base 20 of a generally U-shaped cross section or a generally J-shaped cross section attached to a flange 7, and a seal part 30 which is integrally attached to the mounting base and seals the gap between the body opening opening/closing member and the body opening peripheral edge. The sealant member 70 for the weatherstrip is formed of a synthetic resin-based or rubber-based adhesive with a glass transition point of -10°C or below, and is mounted on the internal face the mounting base of the generally U-shaped cross section or the generally J-shaped cross section of the weatherstrip. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

The present invention relates to a sealant member formed from an adhesive, and in particular, seals between a vehicle body opening / closing member that opens and closes a vehicle body opening such as an automobile door, luggage, and sliding roof, and the periphery of the vehicle body opening. The present invention relates to a sealant member used for an automobile weather strip.

2. Description of the Related Art Conventionally, an automobile weather strip that seals between a door 2 and a vehicle body opening peripheral edge 6 includes a door weather strip 160 attached to an outer retainer 4 such as a door frame in the door 2, as shown in FIG. There are a glass run 150 attached to the inner peripheral channel 3 such as a door frame and an opening trim weather strip 110 attached to the flange 7 on the periphery 6 of the vehicle body opening.
The flange 7 is formed by joining the outer panel 9 defining the vehicle body opening peripheral edge 6 and the tip of the inner panel 8 inside the vehicle by welding or the like.

  The glass run 150 accommodates the front end of the door glass 5 in a substantially U-shaped cross section composed of the vehicle outer side wall 151, the bottom wall 152, and the vehicle inner side wall 153, and the front ends thereof are the front ends of the vehicle outer side wall 151 and the vehicle inner side wall 153. The vehicle is sealed by a vehicle outer side seal lip 154 and a vehicle inner side seal lip 155 extending from the vehicle.

  The door weather strip 160 attached to the outer periphery of the door 2 includes an attachment base portion 161 and a hollow seal portion 164 and a seal lip portion 166 integrally formed on the upper portion thereof. The mounting base 161 is fitted into the retainer 4 and fixed to the door frame. When the door 2 is closed, the seal lip 166 seals the gap between the front end of the door 2 and the vehicle outer side edge of the vehicle body opening periphery 6.

  An opening trim weather strip 110 attached to the flange 7 is provided in the opening of the vehicle body, and the door 2 and the vehicle body opening are located further inside the vehicle than the portion where the door weather strip 160 seals the periphery 6 of the vehicle body opening. The space between the peripheral edges 6 is sealed. The opening trim weather strip 110 is attached to the flange 7 by an attachment base portion (trim portion) 120 having a substantially U-shaped cross section, and the hollow seal portion 130 contacts and swells the bulging portion 2a of the door frame. The trim portion 120 includes a holding lip 125 in which an insert member 124 such as a metal insert is embedded to hold the flange 7.

Conventionally, a non-drying sealant member made of a highly viscous material has been used to improve sealing performance. For example, the door weather strip 160 is sealed between the mounting base 161 and the retainer 4, and the glass run 150 is sealed between the bottom wall 152 and the channel 3. Also, in some opening trim weather strips 110, as shown in FIG. 6, a non-drying sealant member 170 made of a butyl rubber-based highly viscous material is sealed on the inner surface of a trim portion 120 having a substantially U-shaped cross section ( For example, see Patent Document 1.)
However, since the sealant member 170 is a highly viscous liquid, it takes time and effort to handle the sealant member 170. When the trim part 120 is removed from the flange 7 and reassembled after assembling as shown in FIG. 7 and the sealant member 170 adhered to the outer surface of the trim part 120, and reassembly was difficult. Even when reassembly is performed, the sealant member 170 adheres to the holding lips 125 and 126 inside the trim portion 120, and the force with which the holding lips 125 and 126 hold the flange 7 is reduced. There was a risk that the strip 110 would fall off the flange 7.

Further, as described above, the flange 7 is formed by joining the outer panel 9 defining the vehicle body opening peripheral edge 6 and the tip of the inner panel 8 inside the vehicle by welding or the like. Then, the outer panel 9 and the inner panel 8 form a cavity outside the flange 7. Through this cavity, wind noise, tire noise, road surface reflection noise, and other noises are transmitted over the entire periphery of the opening of the vehicle body, but the flange 7 is uneven by spot welding and the unevenness of the sheet metal at the end of the flange 7. Creates a gap. The above noise leaks from this gap and is transmitted into the vehicle.

In order to prevent noise leaking from the flange 7 and rainwater, dust, and noise entering the vehicle from the outside of the vehicle via the interior of the trim portion 120 of the opening trim weather strip 110, sponge rubber or the like is provided inside the trim portion 120. In some cases, the seal member is inserted (see, for example, Patent Document 2). In this case, it is only necessary to fit a sealing member such as sponge rubber into the interior of the trim portion 120, and it takes time and effort to insert the sponge rubber all the way into the trim portion 120. In some cases, the tip of the flange 7 cannot be sufficiently wrapped. For this reason, the above-mentioned sealant member 170 is also used instead of a sealing member such as sponge rubber. In addition, a sealant material has been injected into the trim portion 120 with an injection gun. (For example, refer to Patent Document 3).
Japanese Patent Laid-Open No. 2002-97450 Japanese Utility Model Publication No. 09-315152 Japanese Patent Laid-Open No. 06-135287

Therefore, an object of the present invention is to provide a weatherstrip sealant member that maintains or improves the force for holding the flange of the trim part and can be easily reassembled.

In order to solve the above problems, the present invention of claim 1 is a sealant member used for a weather strip for sealing between a vehicle body opening / closing member of an automobile and a periphery of the vehicle body opening of the automobile.
The weather strip is integrally formed with a mounting base having a substantially U-shaped cross section or a substantially J-shaped cross section that is attached to a flange provided on either the vehicle body opening / closing member or the periphery of the vehicle body opening, and the mounting base. A seal portion that is attached and seals between the vehicle body opening / closing member and the vehicle body opening / closing member in contact with the vehicle body opening / closing member or the vehicle body opening / closing member;
The sealant member is formed of a synthetic resin-based or rubber-based adhesive having a glass transition point of −10 ° C. or less, and is attached to the inner surface of the mounting base of the weather strip having a substantially U-shaped section or a substantially J-shaped section. A weatherstrip sealant member.

According to the first aspect of the present invention, the weather strip to which the sealant member is attached is substantially U-shaped in cross section attached to a flange provided on either the vehicle body opening / closing member of the automobile or the periphery of the vehicle body opening. A mounting base portion (trim portion) having a substantially J-shaped cross section, and a vehicle body opening portion opening / closing member that is integrally attached to the mounting base portion and abuts on the vehicle body opening periphery or the vehicle body opening / closing member that is the other member. A seal portion is provided for sealing between the periphery of the vehicle body opening. For this reason, when the attachment base is attached to the outer periphery of the door frame or the periphery of the vehicle body opening, the seal portion comes into contact with the periphery of the vehicle body opening or the vehicle body opening / closing member when the vehicle body opening / closing member is closed. And the periphery of the opening of the vehicle body can be sealed.

The sealant member is formed of a synthetic resin-based or rubber-based pressure-sensitive adhesive having a glass transition point of −10 ° C. or less, and is attached to the inner surface of the mounting base portion of the weather strip having a substantially U-shaped cross section or a substantially J-shaped cross section. Since the glass transition point of the sealant member is -10 ° C or less, it is flexible over a wide temperature range, easily follows the flange, deforms so as to wrap the tip of the flange, and has sufficient adhesive strength. Therefore, the flange can be firmly held by being in close contact with the flange inserted into the sealant member.
In addition, the adhesive force of a sealant member has 15N-40N.
If the adhesive strength of the sealant member is less than 15N, the trim portion is J-shaped, and when the sealant member alone is held on the flange, the holding force is not sufficient and the trim portion may come off the flange. If the adhesive strength is greater than 40N, the trim part at the time of remounting will be part of the flange, and the peeling work when removing it will be difficult, so it is not preferable. Well, it may be larger than 40N.

In addition, since the sealant member is not liquid and is formed of an adhesive, the sealant member does not adhere to the tip of the flange or the outside of the mounting base even when the mounting base is removed. It doesn't protrude outside and looks good. In addition, since the tip of the flange is inserted inside the adhesive, it strongly holds the flange with its adhesive force, and further, the tip of the flange is wrapped inside the sealant member and securely held. The front end of the flange is difficult to come off from the sealant member, and noise can be prevented from entering the vehicle from the flange.

According to a second aspect of the present invention, the sealant member is a weatherstrip sealant member made of an acrylic, silicone resin, or ethylene-vinyl acetate copolymer (EVA) synthetic resin.

In the present invention of claim 2, since the sealant member is an acrylic, silicone resin, or ethylene-vinyl acetate copolymer (EVA) synthetic resin, the sealant member is used as a base material for the sealant member according to the characteristics of each synthetic resin. A sealant member having good heat resistance, aging resistance, and low temperature characteristics can be obtained.

According to a third aspect of the present invention, the sealant member is a weatherstrip sealant member that is a natural rubber, isoprene rubber, or styrene-isoprene rubber rubber.

In the present invention of claim 3, since the sealant member is a natural rubber, isoprene rubber or styrene-isoprene rubber rubber, the sealant member has a high flexibility, is rich in adhesiveness and adhesiveness, and is attached to the attachment base. Is easy.

According to a fourth aspect of the present invention, the sealant member is an emulsion type or hot melt type sealant strip sealant member.

In the present invention of claim 4, since the sealant member is an emulsion type or a hot melt type, the emulsion type is preferable from the viewpoint of work safety and protection of the global environment without using an organic solvent. The hot melt type has no volatile components, has high workability, and is easy to handle.

The present invention of claim 5 is a sealant member for a weather strip, wherein the sealant member is an emulsion of a copolymer of acrylonitrile and an acrylate ester.

In the present invention of claim 5, since the sealant member is an emulsion of a copolymer of acrylonitrile and an acrylate ester, it can be copolymerized by combining monomers having various characteristics, and has various adhesive performances. A sealant member can be obtained.

According to the present invention of claim 6, the vehicle body opening / closing member is a door, and the weather strip is an automotive weather strip which is an opening trim weather strip.

In the present invention of claim 6, since the vehicle body opening / closing member is a door and the weather strip is an opening trim weather strip, an opening trim weather is formed by using a sealant member at the flange on the periphery of the vehicle body opening. The strip can be securely held, and the front end of the flange can be wrapped with a sealant member to reliably prevent noise from entering the vehicle through the gap between the flanges.

The sealant member according to the present invention has adhesiveness because the glass transition point of the sealant member is −10 ° C. or less, has a sufficient adhesive force to be easily adhered to the flange, and is provided on the inner surface of the mounting base. The flange can be firmly held by closely contacting the tip of the flange that has entered the inside of the housing. Moreover, since the sealant member is formed of an adhesive, even when the mounting base is removed, the sealant member does not adhere to the tip of the flange or the outside of the mounting base, and maintains the holding force of the flange. The sealant member does not protrude outside, and the appearance is good.

The embodiment of the present invention will be described by taking a sealant member 70 used for the opening trim weather strip 10 as an example. In addition to the opening trim weather strip 10, the sealant member 70 of the present invention opens and closes a vehicle body opening such as a door weather strip, a luggage weather strip, a back door weather strip, and the like and closes the opening of the vehicle body opening. It can also be used for weather strips used for members.

The present invention will be described with reference to FIGS.
FIG. 1 is a cross-sectional view of a portion along line AA in FIG. 4 in a state in which an opening trim weather strip 10 provided with a sealant member of the present invention is mounted on a vehicle body opening peripheral edge 6 in FIG. 3 is a perspective view showing a state in which the opening trim weather strip 10 is attached to the vehicle body opening peripheral edge 6 in a state in which the door 2 of the automobile is opened. FIG. 4 is a front view of the opening trim weather strip 10 attached to the periphery 6 of the vehicle body opening.

As will be described later, the weather strip sealant member 70 of the present invention is provided on the inner surface of the trim portion 20 of the opening trim weather strip 10 having a substantially U-shaped cross section. First, the composition of the sealant member 70 will be described, and then the mounting state and the mounting method of the opening trim weather strip 10 and the sealant member 70 will be described.
The sealant member 70 is made of a pressure sensitive adhesive mixed with a foaming agent, a rust preventive agent, or the like as appropriate, based on a base material of rubber or synthetic resin.
As an adhesive, the glass transition point of the base material to constitute is −10 ° C. or lower. When the glass transition point is −10 ° C. or lower, the sealant member 70 does not solidify over a wide temperature range, and the sealant member 70 has sufficient adhesive force, and is firmly held when the tip of the flange 7 is inserted into the sealant member. Can do.
The sufficient adhesive force here means that a value measured by a test method described later is 15 N or more, and it is preferable to have 15 N to 40 N in consideration of the time of reattaching the trim portion.

As this adhesive, acrylic resin, silicone resin, ethylene-vinyl acetate copolymer (EVA), etc. are used for synthetic resins, and natural rubber, isoprene rubber, styrene-isoprene rubber, etc. are used for rubber. Is used. Further, it is used in the form of an emulsion of the above synthetic resin or rubber material or a hot melt resin. Among these, acrylic resins and silicone resin systems are preferable to EVA resins than synthetic resins based on odor problems, and acrylic resins are preferable to silicone resins from the viewpoint of cost.

As for the acrylic resin, which is a synthetic resin adhesive, there are polyacrylic acid ester, polyacrylic acid ester copolymer and the like.
The silicone resin adhesive is composed of a silicone rubber, a silicone resin, and an organic solvent, and has excellent heat resistance and adhesive strength in high and low temperature atmospheres.
The ethylene-vinyl acetate copolymer (EVA) -based adhesive is an adhesive mainly composed of a resin obtained by copolymerizing ethylene vinyl alcohol and vinyl acetate.

A natural rubber-based pressure-sensitive adhesive that is a rubber-based pressure-sensitive adhesive is a pressure-sensitive adhesive mainly composed of natural rubber, and an isoprene rubber-based is an adhesive mainly composed of isoprene rubber. The styrene-isoprene rubber system is a block copolymer of styrene and isoprene. A block copolymer of styrene and butylene can also be used. The rubber-based pressure-sensitive adhesive is preferably composed mainly of natural rubber, but a synthetic resin is more preferable because of its ease of handling.

These pressure-sensitive adhesives can be used as a hot melt type or an emulsion type.
The hot-melt type is a type in which the pressure-sensitive adhesive exhibits adhesive strength by melting and solidifying, there is no volatile matter such as organic solvent in the pressure-sensitive adhesive, the working environment is good, high-speed adhesion is possible, and further work However, there is a problem that a dedicated applicator (apparatus) is required.
Examples of the hot melt adhesive include synthetic resin-based ethylene-vinyl acetate copolymer (EVA) -based rubber and rubber-based styrene-isoprene rubber-styrene copolymer.

An emulsion-type pressure-sensitive adhesive is an emulsion in which resin or rubber colloidal particles or larger fine particles are dispersed in a solvent. And when water is used as the solvent, the emulsion-type pressure-sensitive adhesive is free from volatile substances such as organic solvents as in the hot melt type, has a good working environment, and can use a general-purpose coating device. Its handling is easier than hot melt adhesives.
Emulsion-type adhesives include synthetic resin-based ethylene-vinyl acetate copolymer (EVA) systems, acrylic ester resins, styrene / acrylic ester resins, and silicone / acrylic ester hybrid resins. Examples of the agent include natural rubber and styrene-isoprene rubber-styrene copolymer.

Specifically, a copolymer of a main monomer and a submonomer is used as a constituent component of the acrylic pressure-sensitive adhesive. A base material for a sealant member having necessary performances can be obtained by appropriately combining the main monomer and the submonomer. As main monomers, acrylonitrile, butyl acrylate, 2-ethylhexyl acrylate, isooctyl acrylate, octyl acrylate, isononyl acrylate, decyl acrylate, decyl methacrylate, dodecyl acrylate, dodecyl methacrylate, etc. are used. .
As secondary monomers, acrylic acid ester, acrylic acid, methacrylic acid, vinyl acetate, methyl acrylate, methyl methacrylate, or the like is used.

For example, as a base material for an emulsion-type acrylic adhesive, a copolymer of acrylonitrile and an acrylate ester, polyalkylene glycol (meth) acrylate, sulfoalkyl (meth) acrylate salt, alkyl-substituted (meth) acrylamide, etc. Can be used. In the case of a copolymer of acrylonitrile and an acrylate ester, an emulsion having a synthetic resin content of 55% in water can be used.
In addition, as a base material for hot-melt type acrylic pressure-sensitive adhesives, a block copolymer composed of a (meth) acrylic acid ester polymer and a vinyl-based polymer, a co-polymer containing (meth) acrylic acid ester and an unsaturated carboxylic acid There are coalescence etc.

Further, for example, as a base material of a silicone resin-based pressure-sensitive adhesive, a blend of silicone rubber, which is a long-chain polymer of polymethylmethylsiloxane, and a three-dimensional structure silicone resin (MQ resin) can be used. Silicone resin-based pressure-sensitive adhesives have very high thermal stability, are excellent in heat resistance, cold resistance, and water resistance, and have a wide usable temperature range.

The sealant member contains a softener, a tackifier, a filler, and an anti-aging agent in addition to the polymer as a base material. Furthermore, the foaming agent which provides elasticity, and the rust preventive agent which prevents the rust of a flange can also be contained.
The softening agent is compatible with the polymer of the base material and can be dispersed in the tissue to relax the bond and plastic flow, or can be lubricated to soften and wet the adherend.
As the softening agent, liquid polybutene, mineral oil, liquid polyisobutylene, liquid polyacrylate, and the like can be used.

The tackifier imparts an adhesive force to the sealant member, and a cohesive force, an apparent viscosity is reduced, and a critical surface tension is reduced, thereby improving the adhesive force. Examples include rosin, rosin derivatives, polyterpene resins, terpene phenol resins, petroleum resins, and the like.
However, in the case of the emulsion type acrylic pressure-sensitive adhesive of the copolymer of acrylonitrile and acrylic acid ester described above, the glass transition point is −30 ° C., and even when the double-foaming power is doubled, 28N is a sufficient value. In the case as shown, this tackifier need not be blended.
The filler is used for the purpose of reducing the cost due to heat resistance, imparting electrical characteristics, coloring, and increasing the amount. The filler is easy to uniformly disperse, has little deterioration in physical and chemical properties, and needs to be inexpensive. Examples thereof include zinc white, titanium white, calcium carbonate, and clay.

The anti-aging agent prevents the base material of the sealant member from being oxidized and deteriorated by ozone, heat or light, and an anti-corridor used for ordinary rubber products can be used. There are two types of anti-aging agents, phenolic and amine-based, which can react with radicals generated in the base material to prevent oxidation of the base material.

Next, the mounting state and mounting method of the weatherstrip sealant member of the present invention will be described by taking the opening trim weatherstrip 10 as an example.
As shown in FIG. 3, the vehicle body 1 of the automobile has a vehicle body opening, and the vehicle body opening is opened and closed by a door 2 that is an opening and closing member of the vehicle body opening. The periphery of the vehicle body opening forms a vehicle body opening peripheral edge 6, and the front ends of the outer panel 9 and the inner panel 8, which define the vehicle body opening peripheral edge 6 constituting the vehicle body 1. It is united and welded to form a flange 7 (see FIG. 1). An opening trim weather strip 10 is attached to the flange 7 for sealing between the periphery 6 of the vehicle body opening and the door 2.

The opening trim weather strip 10 is linearly formed by extrusion. As shown in FIG. 4, the straight opening trim weather strip 10 is attached to the flange 7 so as to form an annular shape along the shape of the periphery 6 of the vehicle body opening. The attachment is carried out sequentially from one end of the opening trim weather strip 10 to the flange 7, and when the attachment is completed, the other end is joined to the one end. This terminal may be formed into an annular shape by being joined by the connecting portion 11.
Further, the ends of the opening trim weather strip 10 may be bonded to each other before mounting.

Next, based on FIG. 1, the shape of the opening trim weather strip 10 which is 1st Embodiment is demonstrated.
The opening trim weather strip 10 is in contact with a mounting base portion (trim portion) 20 having a substantially U-shaped cross section, which is attached to the flange 7, and a bulging portion 2 a of the door frame of the door 2. 6 has a hollow seal portion (hollow seal portion) 30 for sealing between the two.

The trim portion 20 has a substantially U-shaped cross section including an outer side wall 21, an inner side wall 22 and a bottom wall 23, and the trim portion 20 has a strong force for clamping the flange 7. Then, the insert member 24 in which the insert member 24 is embedded is formed of sheet metal, wire, or hard synthetic resin. In the case of sheet metal or hard synthetic resin, a large number of strip-shaped bone fragments are arranged in parallel in the width direction, and the strip-shaped bone fragments are connected in a ladder shape or fishbone shape in the longitudinal direction, or a strip-shaped bone A continuous zigzag piece is used. In order to increase the flexibility of the trim portion 20, it is possible to use one that separates the connecting portions of the strip-shaped bone fragments one by one or plural after the insert member 24 is embedded. A continuous zigzag of strip-shaped bone fragments is also stretchable in the longitudinal direction and has flexibility.
As the wire insert member 24, a so-called wire carrier type member in which a wire is bent in a zigzag shape and held in a longitudinal direction by a plurality of threads is used.

  On the inner surface of the trim portion 20, a plurality of vehicle outer side holding lips 25 and a vehicle inner side holding lip 26 are extended from the vehicle outer side wall 21 and the vehicle inner side wall 22 toward the oblique bottom wall 23, respectively. When the flange 7 on the periphery 6 of the vehicle body opening is inserted into the inside of the trim portion 20 having a substantially U-shaped cross section, the vehicle outer side holding lip 25 and the vehicle inner side holding lip 26 sandwich the side surface of the flange 7 so that the opening trim The strip 10 can be held on the flange 7.

In the present embodiment, a plurality of short vehicle outer side holding lips 25 are formed, and one long vehicle inner side holding lip 26 is formed. Since the number of sheet metals constituting the flange 7 is different in each part of the periphery 6 of the vehicle body opening, the thickness of the flange 7 changes. The vehicle interior holding lip 26 bends flexibly as the thickness of the flange 7 changes, and can reliably hold the flange 7 at any thickness.
A cover lip 29 extends from the continuous portion of the bottom wall 23 of the trim portion 20 and the vehicle interior side wall 22 in the vehicle interior direction to cover the tip of the garnish 40 mounted in the vehicle to improve the aesthetic appearance.

The pressure-sensitive adhesive of the first embodiment is composed of the above-mentioned copolymer of acrylonitrile and acrylate ester, and the sealant member 70 made of this pressure-sensitive adhesive is a bottom wall on the inner surface of the trim portion 20 as shown in FIG. 23, the tip of the flange 7 is inserted into the sealant member 70, and the sealant member 70 holds the tip of the flange 7.
In the present embodiment, the side surface of the flange 7 is held by a plurality of vehicle outer side holding lips 25 and one vehicle inner side holding lip 26. For this reason, even if the thickness of the flange 7 changes, the inside holding lip 26 is deformed and held, so that the force for holding the flange 7 is strong and the gap between the flange 7 and the trim portion 20 is reliably sealed. Can do.

As shown in FIG. 2, a side wall sealant member 71 formed of an adhesive may be provided on the inner surface of the vehicle outer side wall 21 without forming the vehicle outer side holding lip 25. The side wall sealant member 71 is formed of the same material as the sealant member 70.
In this case, the insert member 24 embedded in the inside of the vehicle outer side wall 21, the vehicle inner side wall 22, and the bottom wall 23 constituting the trim portion 20 can be omitted. For this reason, the weight of the opening trim weather strip 10 can be reduced, and since the insert member 24 is not simultaneously extruded during extrusion molding, only the rubber material has to be extruded and manufacturing is easy. Since the sealant member 70 and the side wall sealant member 71 strongly hold the tip and side surfaces of the flange 7, the trim portion 20 does not fall off the flange 7 even without the insert member 24.

The holding force when the tip of the flange 7 is inserted into the sealant member 70 is that a steel plate having a thickness of 3 mm and a width of 50 mm is inserted into the sealant member 70 with a force of 30 N, and then pulled up vertically. Is determined by measuring the force when the material peels from the sealant member 70. In this embodiment, an acrylic pressure-sensitive adhesive is used, but the holding force has a peeling force of 35 N, and has a sufficient holding force. Further, the holding force when the same acrylic pressure-sensitive adhesive is used for the double foaming has a peeling force of 28N, and the double foamed material has a sufficient holding power.

Further, in order to insert the flange 7 into the sealant member 70, the tip of the flange 7 is wrapped and held by the highly adhesive sealant member 70. For this reason, the flange 7 can be more strongly held together with the vehicle outer side holding lip 25 and the vehicle inner side holding lip 26. Even when the opening trim weather strip 10 is removed from the flange 7 for repair or the like, the sealant member 70 remains separated as a whole, and the sealant member 70 is separated from the front end of the flange 7 or the inside holding lip 26 of the trim portion 20. Will not adhere.

Further, when the reassembly is performed, the sealant member 70 remains in a lump, adheres to the flange 7, and has a strong force to wrap the tip of the flange 7 in the sealant member 70 and securely hold the sealant member 70. 70 does not protrude outside and looks good. Furthermore, since the sealant member 70 wraps the tip of the flange 7, it is possible to prevent noise from entering the vehicle from the flange 7.

Further, in the opening trim weather strip 10, a hollow seal portion 30 is formed integrally with the trim portion 20. In the present embodiment, it is integrally formed on the outer surface of the vehicle outer side wall 21. The hollow seal portion 30 abuts against the bulging portion 2a of the door 2 when the door is closed, and seals between the door 2 and the periphery 6 of the vehicle body opening. In addition to the hollow seal portion 30, a lip-shaped seal lip may be provided. When the hollow seal part 30 is formed of a sponge material of EPDM rubber or olefinic thermoplastic elastomer, and the trim part 20 is formed of a solid material or fine foamed material of EPDM rubber or olefinic thermoplastic elastomer, the weather resistance is improved. You can get a good product. In this case, the opening trim weather strip 10 is entirely olefin-based, and can be used after being pulverized and recycled together.

Next, a method for manufacturing the opening trim weather strip 10 will be described.
The opening trim weather strip 10 is formed by extrusion molding, and even when an insert member 24 made of metal or hard synthetic resin is embedded in the trim portion 20, the insert member 24 and the solid rubber that constitutes the trim portion 20 are hollow. The sponge rubber constituting the seal portion 30 can be integrally extruded by an extruder.

In molding of the opening trim weather strip 10, synthetic rubber and thermoplastic elastomer are used as the molding material. For example, EPDM rubber is used for synthetic rubber, and polyolefin-based elastomer is used for thermoplastic elastomer. As the sponge material, the above EPDM rubber and thermoplastic elastomer are used by foaming.

In the case of synthetic rubber, it is conveyed to a vulcanizing tank after extrusion and heated by hot air or high frequency to vulcanize and foam. In the case of a thermoplastic elastomer or soft synthetic resin, it is heated and foamed simultaneously with or after extrusion, and then cooled and solidified.
After this extrusion molding, in the case of rubber, after vulcanization, the trim part 20 is opened in a letter C shape, and the sealant member 70 is continuously inserted into the trim part 20 and fixed to the bottom wall 23. Thereafter, the cross section is bent into a substantially U shape, and the insert member 24 of the trim portion 20 is separated if necessary.
Thereafter, it is cut to a predetermined length to produce an extruded part.

The opening trim weather strip 10 manufactured in this way is attached to the flange 7 at the vehicle body opening edge of the automobile.
When the opening trim weather strip 10 is attached to the flange 7, the trim part 20 is inserted into the flange 7 as it is, or the trim part 20 is temporarily fixed with a substantially U-shaped opening slightly open, and the flange 7 may be inserted into the sealant member 70 and attached by a roll forming method.

FIG. 5 is a cross-sectional view showing a state in which the opening trim weather strip according to the first embodiment of the present invention is mounted on the periphery of the vehicle body opening at a portion along line AA in FIG. 4. FIG. 5 is a cross-sectional view showing a state in which an opening trim weather strip according to a second embodiment of the present invention is attached to a periphery of a vehicle body opening portion along a line AA in FIG. 4. It is a perspective view of the side of a car. It is a front view of the opening trim weather strip which is an embodiment of the present invention. It is sectional explanatory drawing which shows the seal structure around the door of the state which attached the conventional opening trim weather strip to the opening edge of a motor vehicle. It is a partial cross section figure in the state where other conventional opening trim weather strips were attached to the opening edge of a car. It is a partial sectional view in the state where other conventional opening trim weather strips were removed from the opening edge of the automobile.

Explanation of symbols

6 Car body opening periphery 10 Opening trim weather strip 20 Mounting base (trim)
21 Car Outer Side Wall 22 Car Inside Side Wall 23 Bottom Wall 24 Insert Member 30 Hollow Seal Part 70 Sealant Member

Claims (6)

In a sealant member used for a weather strip for sealing between a vehicle body opening / closing member of an automobile and a vehicle body opening periphery of the automobile,
The weather strip includes a mounting base having a substantially U-shaped cross section or a substantially J-shaped cross section that is attached to a flange provided on either the vehicle body opening / closing member or the periphery of the vehicle body opening, and the mounting base. A seal portion that is integrally attached and seals between the vehicle body opening / closing member and the vehicle body opening / closing member in contact with the vehicle body opening / closing periphery or the vehicle body opening / closing member as the other member; ,
The sealant member is formed of a synthetic resin-based or rubber-based adhesive having a glass transition point of −10 ° C. or lower, and is attached to the inner surface of the mounting base of the weather strip having a substantially U-shaped section or a substantially J-shaped section. A weatherstrip sealant member characterized by the above. 2. The weatherstrip sealant member according to claim 1, wherein the sealant member is an acrylic, silicone resin, or ethylene-vinyl acetate copolymer (EVA) synthetic resin. 2. The weatherstrip sealant member according to claim 1, wherein the sealant member is a natural rubber-based, isoprene rubber-based, or styrene-isoprene rubber-based rubber.   The weatherstrip sealant member according to any one of claims 1 to 3, wherein the sealant member is an emulsion type or a hot melt type. The sealant member for a weather strip according to claim 1, wherein the sealant member is an emulsion of a copolymer of acrylonitrile and an acrylate ester. 6. The weather strip sealant member according to claim 1, wherein the vehicle body opening / closing member is a door, and the weather strip is an opening trim weather strip.

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