JPH08108743A - Press fitting for slide member - Google Patents

Abstract

PURPOSE: To prevent the occurrence of an unpleasant noise under a high load in a wet condition by using a compact containing the specified thermoplastic resin. CONSTITUTION: Regarding a press fitting for a slide member with a slide section for a member giving a relative slide motion, the slide member is made of a compact of a special polyolefine resin composition of polyethylene system having density equal to 0.95 or above, or high density polyethylene resin. According to this construction, the slide member comes to have high abrasion resistance, and hardly becomes flattened via the abrasion of a flock member or the like forming the slide section. Furthermore, a phenomenon including the fracture of the end of the member and the subsequent adherence thereof to a mating member does not appear, regardless of repeated use. In addition, a dynamic friction coefficient is small and stable even in a wet or semi-wet condition, or even in the environment where the condition changes to a dry condition, and no unpleasant noise is generated during the slide motion of the member.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a retainer that abuts a relatively sliding member, and in particular, it has a good sliding property when moving the relatively sliding member, and has excellent wear resistance and The present invention relates to a retainer for a sliding member that does not cause an unpleasant noise when sliding with a member that slides.

[0002]

2. Description of the Related Art Conventionally, for example, a window glass of a door can be exemplified as a relatively sliding member in an automobile, but particularly in a sashless door type vehicle, as a measure for preventing vibration of the window glass during traveling or opening / closing of the door. For example, as shown in FIG. 1, a wind glass stabilizer (1) is used as a restrainer for the glass.
The stabilizer (1) is a part of the door body (2) that is in sliding contact with the wind glass (4) surface near the waist opening (3), that is, a part such as an outer reinforcement (5), an inner reinforcement (6). A method of suppressing the vibration of the wind glass (4) is employed by fixing it to the surface of the wind glass (4) and slidingly contacting the surface of the wind glass (4) under a predetermined load. In FIG. 1, (7) indicates a weather strip.

As this type of window glass stabilizer, for example, as shown in FIG. 1, for example, one having both an outer stabilizer (11) and an inner stabilizer (21) attached, and either one (11)
Alternatively, a structure having (21) attached is known. FIG. 2 shows such a stabilizer (1).
As shown in FIG. 3, it has a base body (8) made of an elastic material such as rubber or a metal material, and has a flocked portion (9) made of a fluorine-based fiber such as tetrafluoroethylene at a sliding contact portion with a wind glass surface. Those who have are well known.

[0004]

The conventional stabilizer having the above-mentioned structure has a so-called flat shape, in which as the number of times the window glass is opened and closed is increased, the flocked portion is crushed to increase the contact area with the glass. Becomes When opening and closing the wind glass in such a state, the flat tip part may be damaged and the phenomenon of adhering to the glass surface may be seen, and when opening and closing the wind glass, the glass surface may be wet or semi-wet. It has been pointed out that a particularly unpleasant noise is likely to occur in such a wet state. At this time, the stabilizer is attached to the glass surface under a considerably high load as described above, and especially under such a high load, the above-mentioned unpleasant abnormal noise tends to frequently occur.

[0005]

SUMMARY OF THE INVENTION Therefore, the inventors of the present invention have proposed a sliding member in which the sliding contact surface of a molded product is not abraded and the functionality is not deteriorated even if the number of times of opening and closing of the wind glass is increased. For the purpose of providing a suppressor, particularly for the purpose of providing a suppressor for a sliding member that does not easily cause unpleasant noise under high load in a wet state such as a wind glass surface or a semi-wet state. Various studies were repeated. As a result, it was confirmed that these objects could be achieved by using a molded product containing a specific thermoplastic resin as the sliding contact portion of such a retainer, and finally the present invention was reached.

That is, the feature of the present invention is that
In a retainer for a sliding member having a sliding portion with a relatively sliding member, the sliding contact portion is made of either a polyethylene-based special polyolefin resin composition having a density of 0.95 or more or a high-density polyethylene resin. The point is that molded products are an essential component.

A further feature of the present invention is that in a retainer for a sliding member having a sliding contact portion with a relatively sliding member, the sliding contact portion has a polyethylene-based special polyolefin resin composition having a density of 0.95 or more. The point is that a mixture of a molded product of a product and a molded product of high-density polyethylene resin is an essential component.

A further feature of the present invention is that in a retainer for a sliding member having a sliding contact portion with a relatively sliding member, the sliding contact portion is (1) a polyethylene-based special material having a density of 0.95 or more. A molded product made of either a polyolefin resin composition or a high-density polyethylene resin and (2) a fluororesin molded product are essential components.

A further feature of the present invention is that in a retainer for a sliding member having a sliding contact portion with a relatively sliding member, the sliding contact portion is (1) a polyethylene-based special material having a density of 0.95 or more. The point is that a mixture of a molded product of a polyolefin resin composition and a high-density polyethylene resin molded product and (2) a fluororesin molded product are essential constituent elements.

At this time, the "relatively sliding member" means
In relation to the retainer of the sliding member, at least one of them is in a movable state. Therefore, the retainer of the sliding member according to the present invention is in a movable state even in a fixed state. It doesn't matter. Examples of the member that relatively slides include a wind glass and a plastic molded product called a striker attached to the lower portion of the wind glass.

The molded product of the polyethylene-based special polyolefin resin composition having a density of 0.95 or more according to the present invention is obtained by using a resin composition prepared by appropriately blending a high molecular weight polyethylene resin and a high density polyethylene resin. It is a molded product and is not particularly limited, but the preferable range of the blending ratio of the two resins is the former: the latter = 5
50% by weight: about 95 to 50% by weight, more preferably the former: the latter = 10 to 30% by weight: about 90 to 70% by weight. It goes without saying that a molded product of such a resin composition may be mixed with a molded product of another synthetic resin (for example, a fiber) described later.

Further, a molded product of the polyethylene-based special polyolefin resin composition having a density of 0.95 or more and a high-density polyethylene resin molded product may be combined and used as a mixture of molded products. The mixing ratio of the two molded products is not particularly limited, but the preferable mixing ratio range is as follows: former molded product: latter molded product = 5 to 50% by weight: 95 to 5
For example, about 0% by weight, more preferably the former molded product: the latter molded product = 20 to 40% by weight: about 80 to 60% by weight. It goes without saying that such a mixture of molded products may be mixed with other synthetic resin molded products (for example, fibers) described later.

Next, the present invention will be described in detail with reference to specific examples shown in the drawings.

As shown in FIG. 1, there are an outer stabilizer (11) and an inner stabilizer (21) as windshield stabilizers as restrainers, and these are an elastic member, a synthetic resin, and a metal as shown in FIG. A member (for example, a member that slides relative to a base material (8) such as a material
A molded article (for example, a flocked member made of fibers) that constitutes a sliding contact portion that slidably contacts the wind glass,
The flocked member (9) may be applied to the base fabric (10) such as a woven fabric, or may be directly attached to the substrate (8) with an adhesive. At this time, the substrate (8) and the base cloth (10) may be attached with an adhesive or the like, but may be attached via a cushioning member such as felt if necessary, and there is no particular limitation.

Further, the window glass stabilizer may be a one provided with a film as a molded product which constitutes a sliding contact portion which is in sliding contact with a member (for example, wind glass) which slides relatively to the same substrate as described above. Such a film portion may be directly attached to the substrate with an adhesive or the like, or may be attached via a buffer member similar to the above. Such a film may have a single-layer structure or a multi-layer structure and is not particularly limited.

The polyethylene-based special polyolefin resin composition having a density of 0.95 or more according to the present invention comprises a high molecular weight polyethylene resin and a high density polyethylene resin as described above. The problem can be solved by mixing one or more kinds of polyethylene or the like having a molecular weight between the high-density polyethylene and the high-molecular-weight polyethylene used.

The number of kinds of polyethylene having different molecular weights to be combined depends on the shape to be molded, and may be appropriately combined so as to obtain a desired molded product, and there is no particular limitation on the combination.

The density of such a resin composition is
It has a high sliding property of 0.95 or more, and the molecular weight of the composition is 10 to 1 as an average measured by a viscosity method.
500,000, preferably 120,000 to 650,000, more preferably 1
For example, those having a molecular weight of about 500,000 to 500,000 can be exemplified, and the effect of the present invention is most exerted when using such a molecular weight. At this time, the reason why the density is 0.95 or more is to improve the hardness, heat resistance and mechanical strength of the molded product.
At this time, it is possible to add an appropriate third component to the polyethylene-based special polyolefin resin composition.

Here, the high molecular weight polyethylene resin used in the polyethylene-based special polyolefin resin composition means
High molecular weight and ultra high molecular weight polyethylene having a density of 0.94 or less and a molecular weight of 500 to 6,000,000, preferably 800 to 2,500,000 can be exemplified, and there is no particular limitation. Examples of the high-density polyethylene resin include ordinary high-density polyethylene described below. The high-density polyethylene resin used in such a resin composition is as follows.

In the present invention, the high-density polyethylene resin (hereinafter abbreviated as high-density polyethylene) can be used alone, and such a high-density polyethylene molded product is used alone to form the sliding portion. It does not matter if you configure it. On the other hand, when high-molecular-weight polyethylene is used alone, when melt extrusion molding or the like is performed, moldability is deteriorated, and it becomes difficult to mold it as a fiber, for example.

The above-mentioned high-density polyethylene according to the present invention may be a commercially available product, for example, a low / medium pressure method obtained by the Ziegler method, Phillips method, standard oil method or the like, and the density is 0. It is preferably about 95 or more. Such high density polyethylene is quite different from the high molecular weight polyethylene resins described above. Those having a density of 0.95 or more have better physical properties such as tensile strength, elongation, bending strength, etc., and have less deformation under load, as compared with low density polyethylene having a low density.
It also has excellent wear resistance. Also, the softening point (ASTM D
1525) is 115 to 125 ° C. and 30 ° C. higher than 85 to 95 ° C. of low density polyethylene, and is a preferable material from the viewpoint of heat resistance and wear resistance when used in a wind glass stabilizer of an automobile, for example. For such applications, high density polyethylene having a density of 0.95 or more is more preferable. However, the application,
The density value is not particularly limited depending on the method of use. The most effective molecular weight of such high density polyethylene is in the range of 1 to 400,000, preferably about 5 to 200,000.

Examples of the molded article constituting the sliding contact portion according to the present invention include fibers, films, sheets, injection molded articles, and the like, but there is no particular limitation, but fibers are preferable. These molded products also include flocked members obtained by appropriately processing the fibers, and by using these flocked members, they can be suitably used for stabilizers of automobiles, waist moldings, and the like. Therefore, as a preferable embodiment of the molded article, a flocked member can be mentioned, and the film can be used for the same purpose together with the substrate (8), for example. Appropriate additives such as an ultraviolet absorber and a heat deterioration inhibitor may be added to these molded products. Of course, these additives may be blended at the time of forming a molded product, may be mixed in an appropriate amount in the resin to be used in advance, and may be added in any process.

Examples of the ultraviolet absorbers include salicylate-based, benzophenone-based, benzotriazole-based, nickel-based, cyanoacrylate-based, hindered amine-based, oxalic acid anilide-based, carbon and the like. In order to prevent deterioration by ultraviolet rays, these may be mixed in an appropriate amount in the resin used. For prevention of thermal deterioration, for example, if a suitable amount of a phenol-based, phosphorus-based, or sulfur-based antioxidant is mixed and used, slidability does not deteriorate even after long-term use. It is more preferable for applications such as restraints for sliding members in automobiles.

The molded article used in the present invention, for example, the above-mentioned fiber is basically obtained by melt-spinning the above-mentioned specific thermoplastic resin, and is not particularly limited, but for example, a single yarn (monofilament), Examples include multifilaments and finely chopped fibers. Fibrous materials obtained by other methods are also included in the fibers of the present invention.

The shape and length of these fibers or fibrous materials,
The thickness is not particularly limited. For example, with respect to the shape, a circular, hollow, or irregular cross-sectional shape can be exemplified, and the size of one of them is about 5 to 5 when converted to a circular cross-sectional area.
About 300 μm, preferably about 20 to 200 μm, and with respect to the length, it is preferable to use long filaments in the pile knitting / weaving described later, and to use chopped fibers of about 0.3 to 1.5 mm in electrostatic flocking. Regarding the circular cross-sectional area, all fibers having irregular cross-sections, hollow cross-sections, etc. show the diameter when converted into a circle except for spaces, and in the case of a circle, no conversion is required.

There are no particular restrictions on the form of the fibers used in the above-mentioned flocked member (molded product) obtained by processing these fibers, but in general they are often used in the form of filaments.
When used in a filament state, it is more preferable to use it as a yarn such as a multifilament rather than a single yarn. The number of single yarns in such a yarn is not particularly limited, but is about 5 to 200 in consideration of weaving characteristics and the like when forming flock by a pile weave described later. This range depends on the thickness of the filament itself, and when the filament is thick, it is advisable to reduce the number of filaments to facilitate weaving.

When the thickness of the above-mentioned filament is, for example, 20 to 200 μm and 100 threads are arranged to form a thread, the thickness is converted into denier. In the case of a fiber made of a specific resin according to the present invention, 270 Equivalent to ~ 27,000 denier.

As the fiber, for example, untwisted or twisted single yarn, untwisted uniform yarn, and twisted yarn obtained by twisting two or more single yarns can be used, but the present invention is not limited thereto. Here, examples of the twisting method include S twist, Z twist, co-twist, sweet twist, strong twist, morred twist, crepe twist, and mixed twist thereof. Further, a covered yarn in which a filament yarn is wound around a core yarn in a coil shape can be exemplified. Among them, a uniform yarn, a twisted yarn or a covered yarn is preferable, and a twisted yarn is more preferable. Here, spun yarn is also included as the fiber. In addition, such aligned threads,
The twisted yarn, the covered yarn, or the like may be composed of a single yarn, and may be a multi-shaped yarn or a yarn in which a single yarn and a multi yarn are mixed. Here, the fiber diameters of the single yarns forming the yarn may be the same or different. However, in order to achieve the object of the present invention of suppressing the generation of unpleasant noise, it is desirable that the fibers constituting the flocked member have different diameters when viewed in a single yarn state. The thing is not particularly limited.

Further, the specific molded product according to the present invention and another synthetic resin molded product may be mixed and used as a mixture. In order to create the above-mentioned flocked member exemplified as a molded product in such a state, usually, in the molded product according to the present invention, for example, a fiber, another synthetic resin molded product, for example, a fiber (different fiber) is added. The flocked member may be directly formed in the mixed state. The mixing amount in this case is limited to the extent that the essence of the present invention is not changed, and the proportion of other synthetic resin is 5 in terms of cross-sectional area ratio.
It is 0% or less, preferably about 10 to 50%. Examples of preferable "other synthetic fibers" include fluorine-based fibers, polyamide-based fibers, polyester-based fibers, liquid crystal fibers, and polyolefin-based fibers (eg polypropylene-based fibers) other than the specific resin according to the present invention. In the case of the system fiber, the mixing amount is 1 to 50%, preferably 10 to 50%, and more preferably 15 to 40% in terms of cross-sectional area ratio.

Here, the cross-sectional area ratio means the unit area (1
The ratio of the cross-sectional area of the different fibers to the total cross-sectional area of the flocked part per cm ² is shown in%.

In the present invention, the flocked member using the fiber mixed with the fluorine-based fiber has an elastic recovery rate of, for example, 5 to 5 as a barometer of durability as compared with the flocked member of the present invention which is composed of the fiber alone. It is preferable because it is improved by 20% or more. This fluorine-based fiber is a fiber obtained from a generally known fluorine-containing aliphatic polymer. The fluorine-based fiber is not particularly limited, but polytetrafluoroethylene (PTFE), copolymer of tetrafluoroethylene and perfluoroalkyl vinyl ether (PFA), copolymer of tetrafluoroethylene and hexafluoropropylene (FEP). ), Polyvinylidene fluoride (PUD) which is one of fluorinated hydrocarbons
Examples thereof include F), a copolymer of tetrafluoroethylene and ethylene (ETFE), a copolymer of chlorotrifluoroethylene and ethylene, and the like. Above all, PF
A, FEP, and ETFE can be exemplified as more preferable ones, and a mixed fiber using at least two kinds thereof may be used.

Next, a preferred example of the method for producing the flocked member will be described. At this time, the flocked member is preferably one in which piles with cut tips (cut piles) are flocked, but the fact that the piles are cut is not a condition and may be within a range that does not impair the effects of the present invention. For example, a part or all of the flocked member may be flocked by a pile that is not cut. In addition, the tip of the flock may be a loop-shaped pile, or may be a mixture of a loop-shaped pile and a cut pile. As described above, in the present invention, as shown in FIG. 2, the base cloth (1
0) and the fibers forming the flocking member (9) are woven and knitted so that the latter has a pile structure, and then the pile is cut to form a flocking member by so-called cut pile. desirable. The pile knitting / weaving may be a single pile or a double pile, and if necessary, a coating layer (13) made of resin, adhesive, etc. is appropriately formed on the surface opposite to the pile surface to set, and the flocking member is more reliably removed. It may be prevented. In the present invention, this state is referred to as a hair transplant (12). The fibers constituting the above-mentioned base fabric (10) are not particularly limited, but various fibers such as synthetic fibers such as polyester, polyamide, polypropylene and acrylic polymer as well as natural fibers and chemical fibers can be used. is there. The resin and adhesive forming the coating layer described above are not particularly limited, but acrylic, vinyl acetate and the like can be exemplified.
Those having heat resistance are more preferable.

The pile knitting / weaving may be double face knitting pile or double weaving with a double pile knitting / loom machine as described above to obtain a cut pile by cutting into two, or a single pile. The loop (looper-shaped) pile obtained by the knitting / loom machine may be used. Further, it is also possible to form a high-low pile (long and short pile) in which the pile length is partially high and low.

In the flocked member obtained by the above specific example, the distribution state of flocked, that is, the flocked (pile) density also differs depending on the thickness of the single yarn, the thickness of the yarn, the manufacturing method, and the like.
However, the present invention is not limited in any way, but there may be a difference in the effect of the density of flocking to some extent, and the flocking may be performed, for example, in a unit area (1c).
It is preferable that the number of single yarn per m ² ) is about 200 to 10,000. In addition, the length of flocked hair is generally about 2
When it is used as the above-mentioned stabilizer with a length of about 10 mm, it can be exemplified with about 3 to 6 mm. However,
When the flocked member is formed by the electrodeposition flocking method described above, the flocked length can be about 0.3 to 1.5 mm.

In order to use the thus obtained flocked article (12) as a restraint according to the present invention, for example, a stabilizer,
It is necessary to cut it into a predetermined size according to the shape and size of various bases (8) and to attach it to the base (8). At this time, the formation, size, material, etc. of the substrate and the sticking method are not particularly limited, but as the sticking method, a method of sticking to one surface of the necessary substrate with an adhesive (preferably one having high heat resistance) or The method of physically fastening or screwing can be exemplified, and they may be attached separately. When attaching,
A cushioning material such as rubber, sponge or felt may be provided between the base body and the flocked article. At this time, an elastic member such as rubber, a metal material, a synthetic resin or the like can be exemplified as the base, and there is no particular limitation. The size of such a restraint may be arbitrary, but in the case of the above-mentioned stabilizer, although depending on the size of the windshield, small ones are usually arranged on the door side a plurality of times at intervals.

The holding member for the sliding member thus obtained is particularly suitable for use as an inner stabilizer.
This is because dust tends to adhere to the outside of the wind glass, and the glass may be damaged by this influence. Especially when the sliding contact surface is the film portion, the inner stabilizer is preferable. Of course, it can also be used as an outer stabilizer, and in this case, it is configured to have a cleaning part or the like using an appropriate flocking member or the like that is usually used on the upper part of the stabilizer, and to provide a part for temporarily removing dust. However, it is of course possible to use an outer stabilizer without such a cleaning portion.

The retainer for the sliding member according to the present invention is excellent as a wind glass stabilizer for automobiles, particularly as an inner stabilizer, but its use is as a cleaning member for copiers, printers, facsimiles, washing processes, printing processes, etc. Examples of the brushing member, waist molding (weather strip) of an automobile, and the like are not limited to these, and members facing each other move relatively,
Further, the present invention can be applied to all the restraining tools that press the surface of this member.

[0038]

EXAMPLES Next, the present invention will be described in more detail with reference to Examples and Comparative Examples, but it goes without saying that these do not limit the technical scope of the present invention.

The samples obtained in Examples 1 to 3 and Comparative Example 1 were subjected to various tests of Test Examples 1 to 10.

Example 1 First, a hair-implanted portion and a base fabric holding the hair-implanted portion were designed as follows to prepare a hair-implanted article.

[Base fabric design] Warp yarn number 30-2, weft yarn 4
A 0th-two spun polyethylene terephthalate fiber was used, and a base fabric was prepared for preparation with a striking number of 44 / inch and a length of 55 / inch.

[Design of Flocking Member] First, the molecular weight is about 30.
A polyethylene-based special polyolefin resin composition having a density of 0.96 was prepared. This special polyolefin resin composition was a mixture of 20% by weight of an ultrahigh molecular weight polyethylene resin having a molecular weight of about 1,000,000 and 80% by weight of high-density polyethylene having a molecular weight of about 150,000. This resin is L
Supply to a 30mm extruder of / D = 24, 0.5mmφ ×
An unstretched film was obtained by extruding from a 64-hole nozzle. At this time, as the extrusion condition, the screw rotation speed is 2
0 rpm, the resin pressure in the die part is 25 kgf / cm ² , and the cylinder temperature is 100 ° C, 170 ° C, 250 in sequence from the supply part.
° C, head section 250 to 255 ° C, die section 260 to 26
The temperature was 5 ° C., and the discharge amount was 1800 g / H. The unstretched filament thus obtained was stretched 8 times at a temperature of 70 to 80 ° C. to obtain a stretched filament. Regarding the strength and elongation, the elongation was 35% and the strength was 4.5 g / d, and the cross section was circular with a fiber diameter of 163 μm and was 20 d.

Using the thus obtained single yarn, 1280 d /
Make 64f multifilament, then 120
After the S twist was applied at a turn / m, heat setting was performed at 70 ° C. for 30 minutes to obtain one twisted yarn.

Using the thus obtained twisted yarn, preparation was carried out to fabricate a flocking member with the number of yarns strung in at 9 longitudinal / cm and 10 transverse / cm.

With the above design, the pile length after cutting is 5.3 mm and the base cloth width is 40 m by using the double pile loom.
A double pile woven fabric was prepared so that the m and flock width were 15 mm, and the central portion of the double woven fabric was cut to obtain two cut pile woven fabrics. After that, a back coat was applied to the opposite surface of the pile surface with an acrylic-styrene adhesive so that the pile would not lose hair. The pile density is 7 in terms of single yarn.
It was 56 lines / cm ² . The woven fabric (flocked product) thus obtained was cut into a predetermined shape and adhered to a substrate to obtain a sample, which was subjected to the test described below. Furthermore, 30 × 40 mm
It was cut into pieces and attached to a substrate made of a metal material to obtain a stabilizer, which was also subjected to the test described later.

The results of these tests are shown in Table 1.

EXAMPLE 2 One fiber 640d / 32f of the polyethylene-based special polyolefin resin composition prepared in Example 1 and a fluororesin (tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer; PFA) prepared separately were used as multi-fibers. Two filaments 480d / 24f are twisted S120 times / m, twisted Z120
A filament for flocking was produced by combining the filaments at a rate of rotations / m, and a retainer for a sliding member was obtained by the method described in Example 1.

Example 3 Hi-Zex 3300 was used as a high-density polyethylene resin.
Using F (density = 0.954; molecular weight = 100,000 (viscosity method), manufactured by Mitsui Chemicals, Inc.), it was supplied to a 30 mm extruder with L / D = 24, extruded from a nozzle of 0.5 mmφ x 64 holes, and unstretched. Was obtained. At this time, the screw rotation speed is 20 rpm, the cylinder temperature is 75 ° C, 140 ° C, 2
00 ℃, 200 ~ 210 ℃ head, 21 dies
The temperature was 0 to 225 ° C., and the discharge rate was 1500 g / H. The unstretched filaments thus obtained are 70-80
The filament was drawn 6 times at a temperature of ° C. As for the strength and elongation, the elongation was 40% and the strength was 4 g / d, and the cross section was a circle having a fiber diameter of 54 μm and was 20 d.

Using the single yarn thus obtained, 1280
Making d / 64f multifilament, then 1
After applying S twist at 20 times / m, heat setting was performed at 70 ° C. for 30 minutes to obtain one twisted yarn. Hereinafter, a retainer for a sliding member was manufactured under the conditions described in Example 1.

Comparative Example 1 Polytetrafluoroethylene multifilament 1200D / 90f (13.3d, single yarn diameter 2)
A sample stabilizer was produced in the same manner as in Example 1 except that two 9 .mu.m single yarns were used) to form a yarn, and the samples were subjected to the following tests. Table 1 shows the results.

Example 4 High-density polyethylene fiber 640d / obtained in Example 3
32 f, one filament and fluororesin PFA multifilament 480 d / 24 f, two filaments were combined by lower twist S 120 times / m and upper twist Z 120 times / m to prepare a filament for flocking, and the method described in Example 1 was used. Thus, a holder for the sliding member was obtained. The deformation rate of the flocked member in this presser is 20.
It is 4%, the value is the lowest in the examples, and it can be seen that it is difficult to deform.

[Test Method] Test Example 1. Flexural modulus was tested according to ASTM D790.

Test Example 2. Tested according to IZO Impact Strength ASTM D256.

Test Example 3. Deformation rate of flocked member A load of 10 kgf was applied to a sample placed on tempered glass, and after 200 sliding times, the deformation rate of the height of the flocked member when left unloaded for 5 minutes was calculated by the following formula. .

Deformation rate = {(Flock height before test-measured value above) / (Flock height before test)} × 100 Test Example 4. Flocking member Elastic recovery force Load 10kgf and 20kgf on the sample for 10 minutes each, and
The height of the flocked member when left unloaded for a minute was measured and determined by the following formula. Note that FIG. 5 is a graph of the values.

Elastic recovery force (%) = (Flock height after test /
Flock height before test) × 100 Test example 5. Abrasion resistance test A sample on tempered glass (flat plate) is loaded with a load of 10 kgf, and a distance of 450 mm is measured at a speed of 150 mm / sec for 20,000.
The state of the flocked member after sliding once was visually observed.

Test Example 6. Dust sliding test Tempered glass (flat plate) sprayed with dust and wet with a sprayer
A load of 10 kgf was applied to the above sample, and the state of generation of abnormal noise was observed when sliding a distance of 150 mm at a speed of 150 mm / sec 3000 times.

Test Example 7. Dynamic friction coefficient In the measuring instrument shown in FIG. 4, a sample (17) in which a predetermined load (16) was applied to the glass (15) (flat plate) surface.
Was used to determine the dynamic friction coefficient at a speed of 400 mm / min. Here, the value when the load was gradually increased was obtained for each of the state where the glass surface was dry and the state where the glass was wet by the sprayer, and the respective results are shown in FIGS. 6 and 7.
In addition, (18) is a stand which supports a load, (19) shows a load cell.

Test Example 8. Changes in dynamic friction coefficient due to environmental changes
The sample on of tempered glass (flat), a load 1kgf added,
Sliding at a speed of 100 mm / sec for a distance of 100 mm in the following sliding state, the change in the dynamic friction coefficient at that time was determined, and a graph is shown in FIG. At this time, the sliding state is such that after sliding 50 times on the glass surface in a dry state, the surface is wetted sufficiently with a sprayer and sliding is started again, the glass surface becomes completely in a dry state and the friction coefficient is stable. It continued to slide until.

Test Example 9. Dynamic friction coefficient change rate test example 7. Perform the test under the same conditions as above, and when sliding in the order of dry → wet → semi-wet → dry,
The time required for the glass surface to change from the wet state to the semi-wet state and the amount of change (rate of change) in the dynamic friction coefficient per unit time were obtained, and the results are plotted in FIG.

Test Example 8. And Test Example 9. The dynamic friction coefficient was measured by a surface property measuring instrument using Haydon 14DR (manufactured by Shinto Scientific Co., Ltd.).

Test Example 10. Mounting test Two stabilizers obtained in Example 1 were attached to the inner side of the driver's side door of Laurel (manufactured by Nissan Motor Co., Ltd.) and used as the inner stabilizer, and the load pressing the glass surface was gradually increased to make noise. The load value at which it begins to occur was determined.

Test Example 1 above -10. The results are shown in Table 1.

[0064]

[Table 1]

The above test results show the following.

(1) The pressing member for a sliding member of the present invention has a large bending elastic modulus and a strong repulsive force against bending, so that it is less susceptible to settling.

(2) IZO impact strength is high and resistance to impact is high.

(3) The deformation rate of the flocked member is small, and the flocked member is unlikely to be deformed. Particularly, in Example 2 in which PFA was mixed,
The deformation rate is smaller than that in Example 1, and the effect of reducing the flocking deformation rate by mixing PFA is recognized.

(4) The elastic recovery rate of the flocked member is large, and the flocked member is unlikely to be crushed. Especially by mixing PFA,
The elastic recovery rate of the flocked member is improved.

(5) From the results of the abrasion resistance test, it is understood that the retainer of the present invention has excellent abrasion resistance.

(6) From the results of the dust sliding test, the suppressor of the present invention is excellent in that no unpleasant noise is generated.

(7) The suppressor of the present invention has a smaller dynamic friction coefficient than that of the comparative example, especially under a high load. Therefore, it is understood that the suppressor is excellent in slidability and hardly causes abnormal noise.

(8) In the suppressor of the present invention, the change in the dynamic friction coefficient due to the environmental change is small regardless of whether the glass surface is dry, semi-wet, or wet. Since abnormal noise is likely to occur when the dynamic friction coefficient changes, it has been clarified that the suppressor of the present invention hardly causes abnormal noise and always maintains slidability.

(10) From the results of the mounting test, it is clear that the retainer of the present invention does not generate any abnormal noise near the normal load where the inner stabilizer pushes the windshield.

[0075]

INDUSTRIAL APPLICABILITY The retainer for a sliding member according to the present invention is particularly excellent in wear resistance, and it is difficult for the flocked member or the like forming the sliding portion to be worn and to be flattened. It has a special effect that the parts are not damaged and adhere to the other side.

Further, the restraint of the present invention has a low dynamic friction coefficient and is stable even in a wet or semi-wet state, or in a state where these environments change to dry, and it causes an uncomfortable difference during sliding. No sound is produced.

When the suppressor of the present invention is used as a stabilizer for an automobile, it produces a particular effect such that the generation of unpleasant noise can be suppressed compared to the conventional product even under dusty conditions or under high load. .

[Brief description of drawings]

FIG. 1 is a schematic sectional view of a front door of an automobile.

FIG. 2 is a perspective view showing a stabilizer which is a retainer for a sliding member according to the present invention.

FIG. 3 is a cross-sectional view of a flocked member used for the stabilizer.

FIG. 4 is a cross-sectional view showing a dynamic friction coefficient measuring device.

FIG. 5 is a graph showing an elastic recovery rate of a flocked member with respect to a load.

FIG. 6 is a graph showing the relationship between the load and the coefficient of dynamic friction when the glass surface is in a dry state.

FIG. 7 is a graph showing the relationship between the load and the coefficient of dynamic friction when the glass surface is wet.

FIG. 8 is a graph showing changes in dynamic friction coefficient due to changes in environment.

FIG. 9 is a graph showing a changing speed of a dynamic friction coefficient due to a change in environment.

[Explanation of symbols]

 1 Stabilizer 2 Door body 3 Waist opening 4 Wind glass 5 Outer rain force 6 Inner rain force 7 Weather strip 8 Base material 9 Flocking member 10 Base cloth 11 Outer stabilizer 12 Flocking part 13 Back coating part 15 Glass 16 Load 17 Sample 18 units 19 Load cell 21 Stabilizer for inner

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shigeki Yamaguchi 1st Toritsuki, Murakuno-cho, Konan-shi, Aichi Gunze Corporation Engineering Center Business Center (72) Inventor Yukio Mori 1st Toritsuki, Muruno-cho, Konan-shi, Aichi Gunze Corporation Engineering Plastics Business Center (72) Inventor Shoichi Tsukada 163 Morikawahara Town, Moriyama City, Shiga Prefecture Gunze Stock Company Shiga Research Institute

Claims (8)

[Claims] 1. A retainer for a sliding member having a sliding contact portion with a relatively sliding member, wherein the sliding contact portion has a density of 0.95.
A retainer for a sliding member, which comprises a molded product made of either the above polyethylene-based special polyolefin resin composition or a high-density polyethylene resin as an essential component. 2. A retainer for a sliding member having a sliding contact portion with a relatively sliding member, wherein the sliding contact portion has a density of 0.95.
A retainer for a sliding member, which comprises a mixture of the above-mentioned molded product of a polyethylene-based special polyolefin resin composition and a high-density polyethylene resin molded product as an essential component. 3. A retainer for a sliding member having a sliding contact portion with a relatively sliding member, wherein the sliding contact portion comprises (1) a polyethylene-based special polyolefin resin composition having a density of 0.95 or more or a high A retainer for a sliding member, which comprises a molded product made of any one of high density polyethylene resin and (2) a fluororesin molded product as an essential component. 4. A retainer for a sliding member having a sliding contact portion with a relatively sliding member, wherein the sliding contact portion is (1) molded of a polyethylene-based special polyolefin resin composition having a density of 0.95 or more. A mixture of a molded product and a high-density polyethylene resin molded product, and (2) a fluororesin molded product as an essential component for a sliding member retainer. 5. The retainer for a sliding member according to claim 1, wherein the polyethylene-based special polyolefin resin having a density of 0.95 or more has a molecular weight of 100,000 to 1,500,000. 6. The polyethylene-based special polyolefin resin composition having a density of 0.95 or more comprises a high molecular weight polyethylene resin having a density of 0.94 or less and a high density polyethylene resin having a density of 0.95 or more. The retainer for the sliding member according to any one of claims. 7. The retainer for a sliding member according to claim 1, wherein the molded product is a fiber. 8. The retainer for a sliding member according to claim 1, wherein the molded product is a flocked member made of fibers.