JP2950604B2 - Glass run and method for producing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial applications]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a glass run in which an adhered member for glass sliding for smooth sliding of glass is adhered to a rubber substrate made of EPDM, and a method for producing the glass run.

[Prior art and its problems]

2. Description of the Related Art Conventionally, as a rubber member used in automobiles, EPDM (ethylene propylene diene ternary rubber) is widely used in a portion where importance is placed on weather resistance, ozone resistance, heat resistance and the like. It has been studied to improve the design and its function by bonding various members to the rubber substrate made of EPDM. That is, a glass run made of EPDM is provided between a door sash of an automobile and a window glass. In order to enhance the slidability with respect to the window glass, an adhered member for sliding the glass such as a sliding material is adhered to the sliding portion of the glass run, and flocking is performed. By the way, for example, the following method is known as a bonding method for a rubber substrate made of EPDM. That is, this is a method in which a rubber substrate that has been extruded and vulcanized is subjected to processes such as buffing, degreasing, applying a primer, applying an adhesive, drying, attaching a member to be bonded, and curing the adhesive. However, in the conventional bonding technique, many processes described above are required after the vulcanization process, so that the production line is lengthened, the productivity is low, and the cost is increased. In addition, even with the technique of implanting hair on the sliding part of the glass run,
After the adhesive application, it is necessary to perform a process such as flocking using an electrostatic flocking device (Japanese Patent Publication No. 57-56378) and curing the adhesive.
There were similar problems as described above. Further, as another prior art, there is one described in Japanese Patent Application Laid-Open No. 58-158216. That is, a solvent-based adhesive such as ethylene vinyl alcohol (EVA), nylon, or polyester is applied to the surface of the member to be bonded in advance. The adhesive side of the member to be bonded is superimposed on the extruded body immediately after the extrusion molding, and is pressed with a roller or the like, and the adhesive is melted by the heat of the product itself immediately after the extrusion molding. Thereby, the member to be bonded is bonded to the extruded body. However, when this bonding method is applied to the bonding of EPDM, there is no adhesive that firmly bonds to both EPDM and polyester, so that there is a problem that high bonding strength cannot be obtained. An object of the present invention is to solve the above-mentioned problems of the conventional technology, and to apply a buffing process or an adhesive to a sliding portion of a rubber substrate made of EPDM in order to adhere a member to be slid to glass. It is an object of the present invention to provide a glass run which does not require such treatments and has excellent adhesive strength and a method for producing the same.

[Means for Solving the Problems]

Among the inventions made to solve the above problems, the invention of claim 1 is an EPDM having a sliding portion for glass.
A glass run having a rubber substrate made of a non-metallic glass and a member to be slid on the sliding portion of the rubber substrate, wherein the glass substrate is heat-welded to the rubber substrate via a laminated film. A first film made of an olefin-based resin having a polar functional group and disposed on the rubber substrate side as the laminated film, and a polar thermoplastic film disposed on the member to be bonded and having a polarity; It is characterized by using a laminated product of a second film made of resin. Further, the invention according to claim 2 is a method for producing a glass run in which a non-metallic glass sliding adhered member is adhered to a sliding portion of a rubber substrate made of EPDM. The extruded rubber substrate is vulcanized at a predetermined temperature, and the member to be bonded is thermally welded via a laminated film in a residual heat state immediately thereafter, and is disposed on the rubber substrate side as the laminated film, And a laminate of a first film made of an olefin-based resin having a polar functional group and a second film made of a thermoplastic resin provided on the member to be bonded and having a polarity. And Here, EPDM refers to an ethylene-α-olefin-non-conjugated diene copolymer rubber represented by an ethylene propylene diene tertiary rubber. Further, the laminated film is obtained by laminating a first film and a second film. The first film is obtained by introducing a polar functional group into a nonpolar olefin resin. In other words, the first film has an adhesive property to EPDM as an intrinsic property of the olefin resin, and also has an adhesive property to resins such as polyethylene and nylon by introducing a polar functional group. Things. Polar functional groups that add such properties include carboxyl groups, hydroxyl groups, amino groups,
There are a halogen group, an acrylic group and the like. The second film is made of a polar resin and is a thermoplastic resin that is melted by heating. That is,
The second film has a property of bonding to both the first film and a non-metal member such as a sheet material such as polyester or cloth. Further, the member to be bonded is a non-metallic member for glass sliding having a property of bonding to the second film, and is, for example, a woven fabric such as polyester or cloth, or polyvinyl chloride (PVC).
C), a resin sheet of nylon, urethane or the like can be used.

[Action]

The rubber substrate of the present invention uses EPDM having excellent heat resistance, weather resistance and ozone resistance. Since EPDM is a non-polar polymer, it can be bonded to non-polar resins similar to polyethylene and polypropylene, but not to non-metallic materials such as polar resins such as polyester and cloth. In the present invention, a laminated film is used in order to adhere a nonmetallic adherend to a rubber substrate made of EPDM having such properties. The laminated film is obtained by laminating a first film made of an olefin-based resin having a polar functional group and a second film made of a polar thermoplastic. Since the first film has a polar functional group introduced into a nonpolar olefin-based resin, it can be easily laminated with the second film which is a polar thermoplastic resin such as polyester. Using such a laminated film, the first film of the laminated film is disposed on the rubber substrate side and the second film is disposed on the member to be adhered in a residual heat state immediately after vulcanization of the rubber substrate. And press them together. As a result, the first film adheres to EPDM, which is an olefin rubber, because it is compatible, and the second film adheres strongly to the member to be adhered because it has polarity.

【Example】

Hereinafter, an embodiment of the present invention will be described. (1) Adhesive Structure First, in describing an example, an adhesive structure shown in FIG. 2 as a basic configuration and a method of manufacturing the same will be described. In FIG. 2, the bonding structure 1 is configured by bonding a member 9 to be bonded to a rubber substrate 5 made of EPDM via a laminated film 7. The laminated film 7 is composed of a first film 11 provided on the rubber base 5 side and a second film 13 provided on the member 9 to be bonded. Here, EPDM is obtained by adding a small amount of a non-conjugated diene such as ethylidene norbornene, dicyclopentadiene, or 1,4-hexadiene as a third component to ethylene and α-olefin (for example, propylene) and copolymerizing the same. A double bond is introduced into the chain to enable sulfur vulcanization. This 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 Industries, Ltd .: trade name), Bond First (Sumitomo Chemical Co., Ltd .: trade name), and Modic (Mitsubishi Yuka Corporation: trade name) can be used. The material of the second film 13 is a copolyester resin. For example, Chemit R-248 (manufactured by Toray Industries, Inc .:
Trade name) can be used. In addition, as a material of the second film, nylon (N (PA)), polyethylene (PE), polypropylene (PP), polystyrene (PS),
Polyvinyl alcohol (PVA), PVC (PV
C), polyvinylidene chloride (PVDC), ethylene vinyl alcohol copolymer, ionomer (IONOMAER), and the like can be used. Further, the member 9 to be bonded is a glass sliding material having adhesiveness to the second film 13, and for example, a cloth such as polyester or a resin sheet material such as PVC can be used. Next, a method for manufacturing the adhesive structure 1 will be described. The above-mentioned adhesive structure 1 is manufactured by the production line shown in FIG. 1. Before describing a continuous process by the production line, a step of forming the laminated film 7 will be described. As a method of forming such a laminated film 7,
The well-known extrusion lamination method, dry lamination method, wet lamination method, hot melt lamination method, two-layer inflation method and the like can be used. Among them, the extrusion lamination method, which is the most preferable manufacturing method of the laminated film 7, is a method in which each molten resin material of the first film 11 and the second film 13 is formed from a T-shaped die provided at the tip of an extruder. By co-extrusion, a wide film is formed by lamination. In addition, the dry lamination method is a method of bonding separately formed films with an adhesive in another step. Next, the forming step shown in FIG. 1 will be described. First, the rubber base 5 is extruded. An EPDM material 21 is used as the solid rubber of the rubber
The rubber substrate 5 is manufactured by extrusion molding. Next, a vulcanization treatment is performed. This step is performed by passing the extruded rubber base 5 through a vulcanizing tank 25. The vulcanization temperature is 180 ° C to 2 ° C, which is suitable for vulcanizing EPDM.
Perform at 40 ° C. Subsequently, an adhesion process is performed. That is, this step
The member to be bonded 9 to which the laminated film 7 has been previously bonded is
, And the bonded member 9 is sequentially fed out,
The bonding is performed by pressing the member 9 to be bonded to the rubber base 5 with the pressing roller 29. This step is performed in a preheated state immediately after vulcanization of the rubber base 5. Thereby, the laminated film 7 is thermally welded, and the member 9 to be bonded is bonded to the rubber base 5. In addition, besides this method, as shown by a two-dot chain line, the laminated film 7 is wound around the member 9 to be bonded and another roller 30,
By simultaneously feeding out the laminated film 7 and the member 9 to be bonded,
A method in which the laminated film 7 is interposed between the rubber substrate 5 and the member 9 to be adhered and adhered may be used. After cooling through the above steps, the product is completed by performing processing such as bending into a desired shape. In the above embodiment, a first film 11 in which a polar functional group is introduced into a non-polar olefin resin and a second film having a polarity are used for bonding the member 9 to be bonded to the rubber substrate 5 made of EPDM. 13 is used. That is, in the preheating state immediately after vulcanization of the rubber substrate, the rubber substrate 5 is disposed such that the first film 11 of the laminated film 7 is disposed on the rubber substrate 5 side and the second film 13 is disposed on the member 9 to be bonded. The laminated film 7 is interposed between the substrate and the member 9 to be bonded, and they are pressed against each other. Thereby, the first film 11
Is adhered to the rubber substrate 5 because it is compatible with EPDM which is an olefin rubber, and the second film 13 is strongly adhered to the member 9 to be adhered because it has polarity. As a result, the member 9 to be bonded is firmly bonded to the rubber base 5. According to the above-described embodiment, the following effects can be obtained as compared with the related art. Since the bonding process between the rubber substrate 5 and the member 9 to be bonded in the preheated state immediately after vulcanization is performed on a series of production lines in the preheated state immediately after vulcanization, the productivity is excellent. Since the residual heat at the time of vulcanization is used as the energy for heat welding in the bonding process, it also contributes to energy saving. As in the conventional technology, processes such as a buffing process and an application process of an adhesive or the like are not required, so that the production line is shortened,
Equipment is simplified. Since heat welding is used, no adhesive is required,
Therefore, cost reduction can be realized. (2) Glass Run Next, an embodiment applied to a glass run will be described. Third
As shown in the figure, a glass run 101 is attached to the periphery of a window glass 38 of a door 36 of an automobile body 33. FIG. 4 shows a cross section of the glass run 101. As shown in FIG. 4, a rubber base 103 made of solid rubber is attached to a frame (not shown) of the door. A groove 106 for sliding a window glass 105 is formed in the rubber base 103. The groove 106 has a groove bottom portion 107 sliding on the window glass 105 and sliding portions 109 on both sides, and a member to be bonded 113 for sliding is bonded to these via a laminated film 111. Next, a method for manufacturing a glass run will be described with reference to FIG. First, the rubber base 103 was extruded. An extruder 52 was used for extrusion molding. That is, the EPDM material filled in the cylinder 54 was taken out, and an extruded body 115 shown in FIG. 6 was formed. The extrusion speed at this time was set to 5 m / min. The composition of EPDM used in this example is as follows. Blending Blending amount (parts by weight) EPDM Note 1) 100 MAF carbon black 130 Paraffin-based process oil 100 Zinc flower 5 Stearic acid 1 Dehydrating agent (CaO) 5 Vulcanization accelerator 3.5 Sulfur 2 Note 1) “JSREP 57C” (Nihon Gosei) Next, the rubber substrate 103 was vulcanized. In this step, the extruded body 59 is mainly heated by a microwave heater (UHF) 61 for heating and a hot air vulcanizer (HA) mainly for keeping heat.
V) 63. The vulcanization condition at this time was 200 ° C. × 5 minutes. Subsequently, an adhesive treatment was performed. That is, the member-to-be-bonded 113 to which the laminated film 111 was bonded was fed out from the roller 65, and the member-to-be-bonded 113 was welded to the surface of the rubber base 103 by the pressure roller 67 in a residual heat state immediately after vulcanization. At this time, the laminated film 113 uses Admer (Mitsui Petrochemical Co., Ltd .: trade name) as the first film, and uses a copolymerized polyester resin (Chemit R-248 manufactured by Toray Industries, Inc.) as the second film. Are laminated so that their film thicknesses are 50 μm and 30 μm, respectively. Further, as the member 113 to be bonded, a woven fabric made of polyester was used. Subsequently, the formed body after the vulcanization was cooled by the cooler 69 to complete the glass run 101 shown in FIG. Next, after leaving this glass run 101 at room temperature for 24 hours, a test described below was performed. (1) Adhesion strength test (180 ° peeling) A test piece 73 having a width of 5 mm is cut out from the glass run 101 as shown in FIG.
Was pulled in the direction of the arrow with a tensile strength of 100 mm / min. At this time, the peel strength was 2.5 kg / 5 mm load.
The rubber substrate 71 was broken. (2) Sliding resistance measurement test As shown in FIGS. 8 and 9, the glass run 101 was assembled to the frame 121, the glass 123 was slid in the groove 106, and the sliding resistance at that time was measured. The pressing load of the glass 123 was 1 kg, and the sliding speed of the glass 123 was 100 mm / min. The sliding resistance at this time was 0.2 kg / 50 mm, which was equal to or less than that of the conventional flocked product. (3) Abrasion resistance test Under the same conditions as in the test of (2), the glass 123 was slid with a stroke of 100 mm in the direction of the arrow using a gakushin type abrasion test to perform an abrasion resistance test. . As a result, even after the sliding operation was repeated 10,000 times, there was no abnormality such as peeling of the bonded member 113 and detachment of hair. As another embodiment of the glass run, a glass inner provided at a position where the window glass 38 and the lower window frame 36a of the door 36 slide as shown in FIG. May be used. That is, as shown in FIG. 10, the glass inner 131 is formed by bonding the glass sliding adhered member 139 to the sliding portion of the rubber base 133 in which the iron insert member 135 is embedded via the laminated film 137. It is constituted by The glass runs to which the present invention can be applied include the following.
The present invention is applicable not only to a signal channel type door glass run as shown in the figure, but also to other types of glass runs such as a double channel type. Further, as an adhered member for sliding glass of a glass run, besides a flocking type in which flocking is performed with short fibers, a type in which a surface treatment having an effect of reducing sliding resistance may be performed.

【The invention's effect】

As described above, according to the glass run of the present invention,
Since a laminated film that adheres to the rubber substrate and the adhered member is used to adhere the glass sliding adherend to the EPDM rubber substrate, the adhesive strength is excellent. Further, according to the manufacturing method of the present invention, unlike the prior art, steps such as buffing, application of an adhesive, and flocking are not required, so that the production line is shortened and the equipment is simplified. Further, since the bonding treatment is performed in a residual heat state immediately after vulcanization of the rubber substrate, the productivity is excellent and the energy is also contributed.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a method for manufacturing an adhesive structure according to one embodiment of the present invention, FIG. 2 is a sectional view showing the adhesive structure, and FIG.
FIG. 4 is an explanatory view showing the appearance of an automobile, FIG. 4 is a sectional view showing a glass run of the present embodiment, FIG. 5 is an explanatory view showing a production line of the embodiment, and FIG. 6 is extrusion molding of the embodiment. FIG. 7 is an explanatory view showing a test state, FIG. 8 is a cross-sectional view illustrating a glass run test, FIG. 9 is a perspective view illustrating a glass run sliding resistance test, FIG. The figure is a sectional view showing a glass inner. DESCRIPTION OF SYMBOLS 1 ... Adhesive structure, 41 ... Insert member 5,103,133 ... Rubber base 7,111,137 ... Laminated film 9,113,139 ... Adhered member 11 ... First film 13 ... Second film 23 ... Extruder 25 ... ... vulcanizing tank, 101 ... glass run 106 ... groove, 109 ... sliding part 131 ... glass inner

Claims (2)

(57) [Claims] 1. A glass run comprising: a rubber base made of EPDM having a sliding portion for glass; and a non-metallic glass sliding member adhered to the sliding portion of the rubber base. A first film made of an olefin-based resin having a polar functional group, which is provided on the rubber substrate side and has a member to be bonded, the member being heat-welded to the substrate via a laminated film; A glass run characterized by using a laminate provided on a member side and a second film made of a thermoplastic resin having polarity. 2. A method for producing a glass run comprising bonding a non-metallic glass sliding member to a sliding portion of a rubber substrate made of EPDM, wherein the rubber substrate is extruded. A rubber substrate is vulcanized at a predetermined temperature, and a member to be bonded is thermally welded via a laminated film in a preheating state immediately after the vulcanization. The laminated film is disposed on the rubber substrate side and has a polar functional group. Wherein a first film made of an olefin-based resin having the following characteristics and a second film made of a thermoplastic resin having a polarity disposed on the side of the member to be bonded are laminated. Manufacturing method.