JPH07112720B2 - Glass run - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an EPDM in which a molded portion formed by molding is connected to an extruded molded portion.
TECHNICAL FIELD The present invention relates to a glass run manufactured by Mitsumi Co., Ltd., and more particularly to a glass run in which a glass sliding member is adhered to a sliding portion of a molding portion.

[0002]

2. Description of the Related Art Conventionally, as a rubber member used in automobiles, a lot of EPDM (ethylene propylene diene ternary rubber) has been used in a portion where weather resistance, ozone resistance, heat resistance and the like are important. Research has been conducted to improve the design and its function by bonding various members to the rubber base made of EPDM.

That is, a glass run made of EPDM is provided between the window frame of the door of the automobile and the window glass. In order to improve the sliding property with respect to the wind glass, the sliding portion of the glass run is subjected to flocking or urethane lubricant or the like is roller-coated.

By the way, generally, in a glass run, after a plurality of extruded parts having different cross-sectional shapes are extruded and formed so as to match the function of each position of the window frame, these extruded parts are connected by die forming. Then, it is integrated, and this is installed over the entire circumference of the window frame of the door.

[0005]

However, in the extrusion molding section, it is relatively easy to apply flocking or the like by a series of production lines of the extrusion molding process. However, it is difficult to apply flocking or the like in a continuous process in the molding unit connected to the extrusion molding unit. Therefore, in order to apply flocking etc. to the mold forming part, after molding the rubber substrate of the mold forming part, a series of steps such as buffing, degreasing, primer application, adhesive application, flocking by hand processing, adhesive curing etc. There is a problem in that it is necessary to perform the work, and the number of work steps increases. For this reason, conventionally, the mold forming portion is generally not provided with flocking or the like. However, if no treatment is performed, the rubber substrate is worn by sliding of the wind glass, dirt and shavings adhere to the wind glass, and the up-and-down property of the wind glass is deteriorated.

Further, there is known a glass run in which the sliding property is improved by providing a sliding material layer coated with a urethane lubricating material or the like instead of the flocking or the like at the sliding portion of the molding portion. This lubricant layer was scraped by the sliding of the wind glass and had a problem of poor durability.

An object of the present invention is to solve the above-mentioned problems of the prior art, and a glass sliding member is adhered to an EPDM rubber substrate of a molding part connected to an extrusion molding part. Therefore, it is an object of the present invention to provide a glass run which does not require a buffing process or a coating process of an adhesive at the time of bonding, and has excellent bonding strength and durability.

[0008]

DISCLOSURE OF THE INVENTION The present invention, which has been made to solve the above-mentioned problems, is provided with a die-molded portion of a rubber base made of EPDM, which is connected to an extrusion-molded portion formed by extrusion molding. A glass run in which a glass sliding member is heat-welded to a sliding portion of a base body with respect to the wind glass, wherein the glass sliding member is heat-welded to the sliding portion via a laminated film to obtain the laminated film. ,
A first film made of an olefin resin having a polar functional group and provided on the rubber substrate side, and a second film made of a thermoplastic resin having a polarity provided on the glass sliding member side. It is characterized in that a laminate is used.

Here, EPDM means ethylene-α-representative of ethylene-propylene-diene ternary rubber.
Refers to olefin-non-conjugated diene copolymer rubber.

The laminated film is formed by laminating the first film and the second film. The first film is obtained by introducing a polar functional group into a nonpolar olefin resin. That is, the first film has adhesiveness to EPDM as an original property of olefin resin, and also has adhesiveness to resins such as polyethylene and nylon by introducing a polar functional group. It is a thing. Examples of polar functional groups that impart such properties include carboxyl groups, hydroxyl groups, amino groups, halogen groups, and acrylic groups. The second film is a thermoplastic resin which is made of a polar resin and melts by heating. That is, the second film has a property of adhering to both the first film and the glass sliding member.

Further, the glass sliding member has a property of adhering to the second film and is excellent in slidability. For example, a woven fabric such as polyester or cloth, or polyvinyl chloride (PVC). Resin sheets such as nylon, urethane, and the like can be used.

[0012]

The glass run of the present invention is an EP having excellent heat resistance, weather resistance and ozone resistance on the rubber substrate of the molding part.
DM is used. Since EPDM is a non-polar polymer, it can adhere to non-polar resins similar to polyethylene and polypropylene, but cannot adhere to polar resins such as polyester and members such as cloth. In the present invention, a laminated film is used for adhering the glass sliding member to the EPDM rubber substrate having such properties. The laminated film is a laminate of a first film made of an olefinic resin having a polar functional group and a second film made of a polar thermoplastic resin. First
Since the film (1) has a polar functional group introduced into a nonpolar olefin resin, it can be easily laminated with the second film, which is a polar thermoplastic resin such as polyester. Using such a laminated film, for example, the first film of the laminated film is disposed on the rubber substrate side and the second film is disposed on the glass sliding member side in a preheated state immediately after vulcanization of the rubber substrate. It is arranged and these are pressure-welded. This makes the first
The film (2) is adhered because it is compatible with EPDM, which is an olefinic rubber, and the second film is strongly adhered to the glass sliding member because it has polarity.

By thus adhering the glass sliding member to the rubber base of the molding portion using the laminated film, the glass sliding member can be adhered in a simple process.

[0014]

Preferred embodiments of the present invention will be described below in order to further clarify the structure and operation of the present invention described above. (1) Adhesive Structure First, in describing the embodiments, the adhesive structure shown in FIG. 1, which is a basic configuration, and a method for manufacturing the same will be described.

In FIG. 1, the adhesive structure 1 comprises an extrusion molding part 3 made of an extrusion-molded rubber substrate 2 and a molding part 5 having a rubber substrate 4 connected to the extrusion molding part 3. There is. A glass sliding member 9 is bonded on the rubber substrate 4 of the mold forming section 5 via a laminated film 7. The laminated film 7 is the first film provided on the rubber base 4 side.
Film 11 and a second film 13 arranged on the glass sliding member 9 side.

The rubber substrates 2 and 4 are made of EPDM. In EPDM, a small amount of a non-conjugated diene such as ethylidene nobornene, dicyclopentadiene, and 1,4-hexadiene is added as a third component to ethylene and α-olefin (for example, propylene), and copolymerized to form a side chain with a diamine. A heavy bond is introduced to allow sulfur vulcanization.
The EPDM is usually blended with auxiliary materials such as a reinforcing filler (carbon black or white filler), a plasticizer, a lubricant and a vulcanizing agent.

The material of the first film 11 is an olefin resin having a polar functional group. For example, Admer (manufactured by Mitsui Petrochemical Co., Ltd .: trade name), Bond First (Sumitomo Chemical Co., Ltd .: trade name), and Modic (Mitsubishi Petrochemical Co., Ltd .: trade name) can be used.

The material of the second film 13 is a copolyester resin. For example, Chemit R-248 (trade name, manufactured by Toray Industries, Inc.) can be used. Further, the glass sliding member 9 is a material having adhesiveness to the second film 13 and excellent in slidability, and for example, a cloth such as polyester or a resin sheet material such as PVC can be used. .

Next, a method of manufacturing the above-mentioned adhesive structure 1 will be described. The adhesive structure 1 is manufactured by an extrusion molding process and a molding process. As shown in FIG. 2, first, the rubber substrate 2 forming the extrusion molding portion 3 is extrusion-molded. EPDM material 21 is used as the solid rubber of the rubber substrate 2,
The extrusion molded body 25 is manufactured by extrusion molding this with the extruder 23. Next, a vulcanization process is performed. This step is performed by passing the extrusion molded body 25 through the vulcanization tank 27. The vulcanization temperature is 180 ° C. to 240 ° C., which is suitable for vulcanizing EPDM. After cooling, the extrusion molding unit 3 is completed.

Subsequently, the mold forming part 5 is manufactured. First, the extrusion molding unit 3 is installed in the molding die 31, and the molding die 31
The plasticized EPDM rubber material 39 is injected into the cavity 33 formed in the above. Then, the EPDM material 39 is 16
The rubber base 4 is vulcanized by the molding die 31 heated to 0 ° C. to 200 ° C. to form the rubber base 4, and is integrated with the rubber base 2 of the extrusion molding unit 3. After that, the rubber substrate 4 is attached to the molding die 3
Then, the glass sliding member 9 to which the laminated film 7 is adhered is pressed against the rubber substrate 4 in the residual heat state immediately after the rubber substrate 4 is vulcanized. As a result, the laminated film 7 is heat-welded and the glass sliding member 9 is bonded to the rubber substrate 4.

In the above-mentioned adhesive structure 1, a molded EP is used.
A first film 11 in which a polar functional group is introduced into a non-polar olefin resin and a second film 13 having polarity are laminated in order to bond the glass sliding member 9 to the rubber base 4 made of DM. The laminated film 7 is used. That is, the first film 11 of the laminated film 7 is laminated between the rubber base 4 and the glass sliding member 9 so that the first film 11 is arranged on the rubber base 4 side and the second film 13 is arranged on the glass sliding member 9 side. The film 7 is interposed, and these are pressed in a heated state. As a result, the first film 11 is adhered to the rubber substrate 4 because it is compatible with EPDM, which is an olefinic rubber, and the second film 13 is strongly adhered to the glass sliding member 9 because it has polarity. To do. As a result, the glass sliding member 9 is firmly adhered to the rubber substrate 4.

According to the adhesive structure 1 described above, the effects described below can be achieved as compared with the conventional technique.

In the step of adhering the glass sliding member 9 to the molding portion 5, complicated processing steps such as buffing and adhesive are not required, and therefore the productivity is excellent.

Further, since the glass sliding member 9 is heat-welded to the rubber substrate 4 through the laminated film 7 by utilizing the residual heat at the time of molding, the glass sliding member is produced in the production process continuous to the molding. Since 9 can be bonded, it has excellent productivity.

Next, an example of a glass run having the above-mentioned adhesive structure 1 will be described. As shown in FIG. 3, the glass run 401 is attached to the peripheral portion of the window frame of the door 405 of the automobile body 403 to enhance the slidability with the window glass 407 and ensure the sealing property. As shown in FIG. 4, the glass run 401 includes the first to fourth extruded parts 410, 420, 4 having different cross sections.
The first extrusion-molded portion 410 having 30, 440
Between the second extrusion molding section 420 and the first molding section 51.
0, the second extrusion molding part 420 and the third extrusion molding part 430 are connected by the second die molding part 520, and the third extrusion molding part 430 and the fourth extrusion molding part 440 are connected.
The third mold forming part 530 is connected between the two.

Of the glass run 401, the first extrusion molding section 410 and the second extrusion molding section 420, and the first molding section 510 for connecting the first extrusion molding section 410 and the second extrusion molding section 420 will be representatively described. As shown in FIG. 5, the first extrusion-molded portion 410 includes a rubber base 413 integrally formed with a lip portion 411, and a groove 41 for sliding a window glass 407 on the rubber base 413.
Have four. A glass sliding member 418 is bonded to the sliding portion of the base 415 of the rubber base 413 via a laminated film 417. Also, the lip portion 411
A urethane lubricant is applied to the.

The second extruded part 420 has a mounting base 422 in which an insert member 421 is embedded, and the mounting base 4
22 and a rubber base 423 formed integrally. A glass sliding member (not shown) is bonded to a sliding portion of the base portion of the rubber base 423 through a laminated film (not shown).

The first mold molding section 510 includes a rubber base 413 of the first extrusion molding section 410 and a second extrusion molding section 420.
It has a rubber base 513 for connecting the mounting base 422 and the rubber base 423. As shown in FIG. 6, the glass sliding member 51 is provided on the lip portion 514 and the base portion 515 of the rubber substrate 513 via the laminated films 516 and 517.
8,519 are adhered.

Next, a method of manufacturing the glass run 401 will be briefly described. In this glass run 401, first to fourth extrusion molding portions 410, 420, 430 and 440 are manufactured by an extrusion molding method, and these are formed by injection molding into first to third mold molding portions 510, 520 and 530. It is manufactured by connecting. Since the first to fourth extrusion-molded portions 410, 420, 430, 440 and the mold-molded portions 510, 520, 530 for connecting and molding them are manufactured by substantially the same method, the first and second The extrusion molding units 410 and 420 and the first mold molding unit 510 will be described as representatives.

First, the rubber substrate 413 was extrusion-molded. In the extrusion molding, an extrusion molded body was formed by extruding the EPDM material using an extruder. The extrusion speed at this time was set to 5 m / min. Next, the rubber base 413
Was vulcanized. This step was performed by passing the extruded product through a microwave heating device (UHF) mainly for heating and a hot air vulcanizing device (HAV) mainly for heat retention. The vulcanization conditions at this time are 200 ° C. × 5
Adopted minutes. Then, an adhesive treatment was performed. That is, the glass sliding member 4 to which the laminated film 417 is adhered
The glass sliding member 418 was welded to the base portion 415 of the rubber substrate 413 by a pressure bonding roller in a residual heat state immediately after vulcanization. In the laminated film 417, Admer (Mitsui Petrochemical Co., Ltd .: trade name) is used as the first film, and a copolyester resin (Chemit R-248 manufactured by Toray Industries, Inc.) is used as the second film. The layers are laminated so that the thicknesses are 50 μm and 30 μm, respectively. Further, the glass sliding member 418
As the fabric, a woven fabric made of polyester was used.

Subsequently, after cooling the molded body, urethane lubricant was roller-coated on the lip portion 411 of the rubber substrate 413 and further cut by a cutter. After that, the end portion of the glass sliding member 418 is attached to the heat-resistant thread 61 by using a sewing machine.
9 was sewn to the rubber substrate 413. This sewing operation is performed in order to prevent the end portion of the glass sliding member 418 from being peeled off from the rubber base 413 due to heat in the later-described molding. As a result, the first extrusion molding section 410 was completed.

On the other hand, the second extrusion molding section 420 is the same as the above-mentioned first extrusion molding section 410 except for the step of simultaneously extrusion molding and embedding the insert member 421 together with the rubber material.
It is manufactured in almost the same process as the molding method of.

Subsequently, the first mold forming section 510 was manufactured. First, the first extrusion molding part 410 and the second extrusion molding part 420 were installed in the molding die 701 (see FIG. 7). The molding die 701 includes an upper die 703, a lower die 705, and an intermediate die 7.
It is formed from 07. It should be noted that a glass sliding member 518 is provided at a portion of the intermediate die 707 where the lip portion 514 is formed.
Is formed with a convex portion 708 for bonding. Then, the EPDM rubber material is injected into the cavity 709 formed in the molding die 701. Then, the injected rubber material is vulcanized to form the rubber base 513, and the rubber bases 413 and 413 of the first and second extrusion-molded portions 410 and 420.
Integrated with 423.

Thereafter, the rubber substrate 513 is removed from the molding die 701 in a preheated state of about 170 ° C. before being completely cooled. At this time, as shown in FIG. 8, the concave portion 5 formed by the convex portion 708 of the intermediate die 707 is formed in the lip portion 514.
14a is formed. Next, in the residual heat state, the glass sliding member 518 to which the laminated film 516 is adhered is pressed into the recess 514a of the lip portion 514. The laminated film 516 is formed by laminating the same material as the laminated film 417. Therefore, the lip portion 5
Since the temperature of 14 is about 170 ° C., the laminated film 51
6 is heat-welded, and the glass sliding member 518 is attached to the rubber base 5.
It is adhered to the lip portion 514 of 13.

Here, the glass sliding member 518 has a thickness of about 1.0 mm, which is thicker than 0.1 mm of the urethane lubricant layer of the lip portion 514, but has a recess 514a formed in the lip portion 514. Since the glass sliding member 518 is bonded to the recess 514a, the lip portion 514 is
And, it becomes flush with the lip portion 411 and the like of the second extrusion molding portion. Therefore, since there is no step difference with respect to the windshield at this portion, smooth sliding can be obtained. Similarly, the glass sliding member 519 to which the laminated film 517 is adhered is also pressure-welded to the base portion 515 to be heat-welded.

Therefore, when the glass sliding members 518 and 519 are adhered to the rubber base 513 of the first molding part 510, the glass sliding members 518 and 519 are bonded to the rubber base 5.
Since it can be pressed against 13, it does not require complicated processing steps such as buffing and adhesive as in the conventional technique, and is excellent in productivity.

Further, since the glass sliding members 518 and 519 are heat-welded to the rubber substrate 513 through the laminated films 516 and 517 by utilizing the residual heat at the time of molding, the productivity is excellent.

Further, the glass sliding member is adhered to the second molding section 520 and the third molding section 530 in the same manner as described above. For example, as shown in FIG. 9, a third extrusion-molding section 430 and a third extrusion-molding section 440 that connect the third extrusion-molding section 430 and the fourth extrusion-molding section 440 are connected.
In the mold forming part 530, the rubber base 443 and the rubber base 43 are
3 and 3 are connected and molded by the rubber base 533 of the third mold molding part 530. Since the window glass 407 slides on the lip portion 534 of the rubber substrate 533, the glass sliding member 538 is heat-welded to this sliding portion. As a result, smooth slidability with respect to the window glass 407 can be ensured.

Next, the glass run 401 was allowed to stand at room temperature for 24 hours and then subjected to the test described below.

(1) Adhesive Strength Test (Peeling by 180 °) From the first molding part 510, as shown in FIG.
mm test piece 73 is cut out, and with respect to the rubber base 75,
Pulling speed of the tip of the glass sliding member 77 in the arrow direction: 1
It was pulled under the condition of 00 mm / min. The peel strength at this time was a break in the rubber substrate 75 under a load of 2.5 kg / 5 mm.

(2) Sliding resistance measurement test As shown in FIGS. 11 and 12, a test piece 101 cut out from the first die molding section 510 was assembled to the frame 121,
The glass 123 was slid on the groove 106, and the sliding resistance at that time was measured. The pressing load of the glass 123 is
The sliding speed of the glass 123 is 100 mm /
Minutes The sliding resistance at this time is 0.2 kg / 50 m
m, which was less than or equal to the conventional flocked product.

(3) Abrasion resistance test A glass 123 with a stroke of 100 mm in the direction of the arrow using the Gakushin type abrasion test in the same state as the test of (2).
Was slid on and a wear resistance test was conducted. As a result, 1
Even after sliding 10,000 times, there was no abnormality such as peeling of the glass sliding member.

In the above embodiment, in addition to the mold forming section,
The glass sliding member was adhered to the extruded part through the laminated film, but the extruded part may be coated with a urethane lubricant or may be flocked.

The glass run 40 to which the present invention can be applied.
No. 1 is applicable not only to a single channel type door glass run as shown in FIG. 4 etc., but also to other types of glass runs such as a double channel type. further,
As a glass sliding member for sliding glass in a glass run,
In addition to the polyester woven fabric, a flocked type in which flocking processing with short fibers is performed, or a type in which surface treatment with Teflon coat having a sliding resistance reducing effect is performed may be used.

[0045]

As described above, according to the glass run of the present invention, in order to bond the glass sliding member to the rubber base of the EPDM mold forming part, the glass sliding member is bonded to the rubber base and the glass sliding member, respectively. Since the laminated film is used, it has excellent adhesive strength. Further, since the glass sliding member is adhered to such a molded portion, the sliding resistance is not reduced by the molded portion. Moreover, it is possible to adhere the glass sliding member, such as the molding part, to a place where it is troublesome to adhere the glass sliding member in a simple working process.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an adhesive structure according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram illustrating a manufacturing process of an adhesive structure.

FIG. 3 is an explanatory view showing a glass run attached to a window frame of an automobile door.

FIG. 4 is an explanatory diagram illustrating a cross-sectional shape of a glass run.

FIG. 5 is a perspective view showing the periphery of a first mold forming portion of a glass run.

FIG. 6 is a cross-sectional view of a first mold forming portion of a glass run.

FIG. 7 is an explanatory view illustrating a mold forming process.

FIG. 8 is an explanatory diagram illustrating a bonding step of a glass sliding member.

FIG. 9 is a perspective view showing the periphery of a third mold forming section.

FIG. 10 is an explanatory diagram illustrating an adhesive strength test.

FIG. 11 is a cross-sectional view illustrating a test of a glass run.

FIG. 12 is an explanatory diagram illustrating a sliding resistance test of a glass run.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Adhesive structure 2 Rubber base 3 Extrusion molding part 4 Rubber base 5 Molding part 7 Laminated film 9 Glass sliding member 11 First film 13 First film 401 Glass run 407 Wind glass 410 First extrusion molding part 413 Rubber substrate 417 Laminated film 418 Glass sliding member 420 Second extrusion molding part 423 Rubber substrate 510 First mold molding part 513 Rubber substrate 514 Lip part 514a Recess 516 Laminated film 517 Laminated film 518 Glass sliding member 519 Glass slide Dynamic member

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location B29C 69/00 2126-4F B60J 10/04 // B29K 19:00 B29L 9:00 31:30

Claims (1)

[Claims] 1. A glass sliding member is heat-welded to a sliding portion of the rubber substrate, which is connected to an extrusion-molded portion molded by extrusion molding and is made of an EPDM rubber substrate, on the sliding portion of the rubber substrate with respect to the window glass. In the above glass run, the glass sliding member is heat-welded to the sliding portion via a laminated film, and as the laminated film,
A first film made of an olefin resin having a polar functional group and provided on the rubber substrate side, and a second film made of a thermoplastic resin having a polarity provided on the glass sliding member side. A glass run characterized by using a laminate.