JPS6235610Y2 - - Google Patents

Description

[Detailed explanation of the idea]

TECHNICAL FIELD The present invention relates to a glass run for guiding a window glass provided in an automobile door or the like. BACKGROUND OF THE INVENTION Glass runs of the above type for installation in motor vehicle window frames are well known in the art. In this type of glass run, for the purpose of reducing the sliding resistance between the main body and the window glass, it has been practiced for a long time to apply hair flocking to the part of the glass run main body that comes into sliding contact with the window glass.
However, if such hair flocking is applied to the main body of the grass run, the number of processing steps increases accordingly, and the manufacturing cost of the grass run inevitably increases. Focusing on this point, the present applicant has already developed a structure in which a large number of irregularities are formed along the longitudinal direction of the sliding contact portion of the glass run body with the window glass, thereby making it possible to omit flocking. It has been proposed (Jitsukaiaki
51−55522). According to the configuration related to this proposal, it is possible to certainly reduce the manufacturing cost of glass run, and in that sense, it is possible to obtain excellent effects. However, if only the irregularities are formed on the glass run main body, there is a risk that the glass run main body will be worn out relatively early due to the sliding contact between the main body and the window glass. When the window glass is curved, when the window glass is moved, an uneven load acts on the main body of the glass run, so the above-mentioned problem is particularly likely to occur. Furthermore, Japanese Patent Application Laid-Open No. 55-51620 discloses that in order to improve the abrasion resistance of a glass run whose sliding surface is flocked, a surface treatment agent containing a fluororesin is applied to the flocked surface. However, fluororesin is expensive and has the drawback of increasing the price of the glass run itself. Purpose The present invention was made based on the above recognition, and aims to improve the wear resistance of the glass run body and provide an inexpensive glass run. Configuration The present invention provides a glass run in which a plurality of projections and depressions are formed on at least a part of the surface of the glass run main body that comes into sliding contact with the window glass, and at least a part of the surface of the glass run main body that comes into sliding contact with the window glass.
A surface treatment agent is applied, and the surface treatment agent is
Contains 10 to 15 parts by weight of fluororesin powder, 5 to 10 parts by weight of aminosilane-treated glass beads, and silicone oil, and a combination of fluororesin powder and aminosilane-treated glass beads to 100 parts by weight of the urethane binder. It is characterized by a total amount of 20 parts by weight, and it reduces the manufacturing cost of glass runs by omitting the flocking process.It improves the abrasion resistance of conventional grass runs with unevenness while suppressing cost increases. can do. Hereinafter, specific examples of the present invention will be described in detail with reference to the drawings. FIG. 1 shows an example of a glass run according to the present invention, and FIG. 2 shows a state in which the glass run shown in FIG. 1 is used. The glass run main body 1 shown in FIG. 1 is composed of a base 2 formed in the shape of an elongated plate, and two lip parts 3 provided so as to protrude from each side end of the base 2. Such a glass run is the main body 1
is made of a soft material such as soft synthetic resin or rubber. As shown in FIG. 2, the completed glass run main body 1 is attached to the glass run housing recess 5 in the window frame 4 of an automobile, and the edge of the window glass 8 is fitted into the groove 7 defined between both lip parts 3. will be combined. The lip portion 3 is formed to be easily elastically deformable,
The lip portion 3 contacts the surface of the window glass 8 with a predetermined pressing force. Further, the glass run main body 1 in this example is configured so that the surface of its base portion 2 also comes into contact with the end surface of the window glass 8. A large number of projections and depressions 9 are formed on the portion of the glass run main body 1 that contacts the window glass, and a surface treatment agent according to the present invention is applied to the portion of the glass run main body on which these projections and depressions are formed. The unevenness 9 in this example is formed in an uneven shape extending along the longitudinal direction of the glass run main body 1, and the cross-sectional form thereof can be any suitable form such as a rectangle, a triangle, or a semicircle. Although the illustrated glass run is generally constructed as described above, details thereof will be clarified by explaining an example of a method for manufacturing this glass run. First, a raw material made of the soft material as described above is prepared, and molded into the shape shown in FIG. 1 by extrusion molding, and subjected to a vulcanization process as necessary to obtain the glass run body 1. At this time, the above-described unevenness 9 is formed at a predetermined portion of the glass run body 1 by this extrusion molding. Next, a surface treatment agent is applied to the surface of the glass run body 1 on which the unevenness is formed. The treatment agent contains 10 to 15 parts by weight of fluororesin powder, 5 to 10 parts by weight of aminosilane-treated glass beads, and silicone oil, per 100 parts by weight of the urethane binder. At this time, the total amount of the fluororesin powder and the aminosilane-treated glass beads is 20 parts by weight based on 100 parts by weight of the urethane binder. The fluororesin of the present invention is a homopolymer or copolymer of fluorinated olefins (e.g., fluorinated products of ethylene, propylene, butylene) and/or fluorinated chlorinated olefins, such as tetrafluoroethylene polymer, chlorotrifluoroethylene polymer. etc. The molecular weight of the fluororesin powder is 15,000 to 60,000, and J.Appl.Polym.Sci. 17
3253 (1973), and the average particle size is 10 to 20μ. It is known that this fluororesin powder can be dispersed in paint to improve wear resistance, but the drawback is that it is more expensive than general-purpose resins. As silicone oil, it is about 10,000 to
Dimethyl silicone oil or the like having a viscosity of about 100,000 centistokes can be advantageously used. This silicone oil has lubricating properties, but if added in large amounts, the binder will denature and become brittle.
Therefore, the limit is 15 parts by weight per 100 parts by weight of the binder. If the amount is less than 5 parts by weight, the object of the present invention cannot be achieved due to lack of lubricity. As the binder, polyester polyol, polyether polyol, castor oil or modified castor oil, etc. are used, and together with a curing agent such as polyisocyanate, a two-component thermosetting urethane resin is formed. Further, as the glass beads, it is advantageous to use beads in which 50% by weight or more have a size of 20 to 40 μm, and moreover, glass beads whose surfaces are coated with aminosilane as a coupling agent are used. In addition, in order to actually apply such a surface treatment agent to glass run, it is necessary to dissolve or disperse each of the above-mentioned substances in a dispersion medium before applying it. For example, methyl ethyl ketone (MEK) or the like can be used as appropriate. After applying the above-mentioned surface treatment agent to the main body of the glass run, it is dried to finally complete the glass run. When the completed glass run is attached to the window frame 4 as shown in FIG. 2, the window glass 8 becomes
Contacting the unevenness 9 of the glass run body 1 in a line contact manner,
Furthermore, since the surface of the window glass 8 is coated with a treatment agent, when the window glass 8 is moved, the sliding resistance acting on the window glass 8 remains small, allowing the window glass 8 to be opened and closed smoothly. In addition, by applying the surface treatment agent, the wear resistance of the glass run main body 1 can be improved, and its life can be extended. Furthermore, glass beads, which are generally available at a lower cost than fluororesins, are used in the surface treatment agent to replace a portion of the fluororesin powder, so it is possible to suppress the increase in cost associated with the application of this treatment agent. Incidentally, the unevenness and surface treatment agent may be applied to the entire sliding contact portion of the window glass in the glass run main body, but it may be applied only to a part of this sliding contact portion, for example, only to the portion that constantly contacts the window glass 8. However, the intended purpose of the present invention can be achieved. Furthermore, for convenience during processing, it is of course possible to perform unevenness and/or surface treatment on the surface portion of the glass run that does not come into contact with the window glass, or on the entire surface of the glass run. Further, the drawings only show one example of the glass run main body, and the present invention can be applied to glass runs having other suitable shapes. Further, the shape of the unevenness does not necessarily have to be an uneven line extending in the longitudinal direction of the glass run body, but may be, for example, an uneven line extending diagonally with respect to the longitudinal direction of the glass run, or a mesh-like unevenness. Finally, when the glass run body shown in the figure was coated with a surface treatment agent, the glass run body was actually attached to the window frame of a car, and the number of times the window glass was opened and closed was measured until the base material of the glass run body was exposed. The results of the wear resistance test are shown below. For this test, we used the four types of tables listed in Table 1.

[Table] In Example 1 shown in Table 1, 1/4 part by weight of the fluororesin powder in Comparative Example 1 was replaced with the same weight of glass beads, and the number of wears was improved by 14%. In addition, Example 2 contains 1/1/2 of the fluororesin powder of Comparative Example 1.
Although 2 parts by weight was replaced with the same part by weight of glass beads, the number of wears was almost the same. As shown in Comparative Example 2, when 3/4 of the fluororesin powder in Comparative Example 1 is replaced with glass beads, the number of wears is reduced compared to Comparative Example 1. That is, a urethane-based bond is applied to at least a part of the surface of the main body of the glass run that comes into sliding contact with the window glass of a non-flocked glass run that has a plurality of irregularities formed on at least a part of the surface that comes into sliding contact with the window glass. In a surface treatment agent containing 20 parts by weight of fluororesin powder and silicone oil, when 5 to 10 parts by weight of the 20 parts by weight of fluororesin powder is replaced with aminosilane-treated glass beads. , the price of the surface treatment agent can be lowered compared to when glass beads are not used,
Moreover, the wear resistance can be the same or improved. Effects According to the present invention, not only can the flocking process of glass run be omitted, but also glass beads are included in the surface treatment agent in place of part of the fluororesin, thereby reducing the cost of glass run and improving the wear resistance of the glass run body. You can improve your sexuality.

[Brief explanation of the drawing]

FIG. 1 is a partial perspective view of the glass run according to the present invention, and FIG. 2 is a sectional view showing the usage state of the glass run shown in FIG. 1. 1...Glass run body, 2...Window glass, 9...
...Unevenness.

Claims (1)

[Scope of Claim for Utility Model Registration] In a glass run in which a plurality of irregularities are formed on at least a part of the surface of the glass run main body that comes into sliding contact with the window glass, at least a part of the surface of the glass run main body that comes into sliding contact with the window glass has a surface A treatment agent is applied, and the surface treatment agent contains 10 to 15 parts by weight of fluororesin powder, 5 to 10 parts by weight of aminosilane-treated glass beads, and silicone oil based on 100 parts by weight of the urethane binder. The above-mentioned glass run is characterized in that the total amount of the fluororesin powder and the aminosilane-treated glass beads is 20 parts by weight.