WO2003020554A1

WO2003020554A1 - Non-flocked weatherstrip for vehicle and method for manufacture thereof

Info

Publication number: WO2003020554A1
Application number: PCT/JP2002/002422
Authority: WO
Inventors: Nakajiro Yoshida; Masayuki Honda; Nobuyasu Noda
Original assignee: Shin-Etsu Polymer Co., Ltd.
Priority date: 2001-08-28
Filing date: 2002-03-14
Publication date: 2003-03-13
Also published as: JP4201266B2; JPWO2003020554A1

Abstract

A non-flocked weatherstrip having a single-piece construction composed of a body portion (3) for mounting it on a vehicle and a lip portion (4) to be abutted against the window glass (7) of a door, wherein a lip surface layer portion (6) is formed on the surface of the lip portion (4) contacting with the window glass (7) through molding a layer comprising a thermoplastic resin composition or thermoplastic elastomer composition containing crosslinked particles by the two-color extrusion method, and the surface of the lip surface layer portion exhibits a concave-convex shape having a ten point average roughness (Rz) of 300 to 500 μm, as measured by means of a lazer microscope. It is preferred for achieving the above surface roughness that, in the two-color co-extrusion molding to form the lip surface layer portion (6), the ratio of the land length L (mm) of a two-color extrusion die to the thickness t (mm) of the lip surface layer portion (6), L/t, lies in the range of 20 to 200. The non-flocked weatherstrip is formed by the use of a thermoplastic resin or thermoplastic elestomer composition having excellent formability, and also exhibits sliding property, dust removing property, low glass surface marring property, abrasion resistance, flexibility and sealing property which are comparable to those of a weatherstrip flocked with nylon piles, and thus suitably used for a window glass of an automobile or the like.

Description

W

Specification

FIELD OF THE INVENTION

The present invention relates to a weatherstrip used in contact with a window glass that is fitted into a door of a vehicle such as an automobile and is opened and closed. In particular, it relates to a weatherstrip without a flocking pile for an exterior facing door and window glass. Background art

A weatherstrip is attached around the windowpane fitted to the door of a vehicle such as an automobile to prevent rainwater, dust, sand particles, etc. from being drawn in when sliding the windowpane. Often.

Conventionally used weatherstrip products for vehicles, as shown in an example of a cross-sectional view in Fig. 4, the main body 3 having a core 2 made of a metal material such as stainless steel and the lip 4 It is integrally formed by extrusion molding using a resilient polymer material such as a vinyl resin composition or vulcanized EPDM rubber, and the surface of the lip portion 4 that comes into contact with the window glass is made of a nylon single piece using an adhesive. It has a structure in which piles 5 made of fibers and the like are electrostatically planted. With such a configuration, the laser strip 1 exhibits performances such as slidability, dust removal, glass surface scratch resistance, abrasion durability, and flexibility.

The lip portion 4 of the weatherstrip 1 is pressed against the glass surface by using the elasticity of the material to prevent foreign matters such as rainwater and sand particles from entering. However, especially on the outer side, foreign matter such as sand particles blown by the wind may be trapped between the window glass and the lip portion 4 of the weatherstrip 1, causing damage to the glass surface. Prone. Damage to the glass surface is caused by foreign matter remaining in one area of the lip and repeatedly rubbing the glass surface.Foreign matter once sandwiched between the glass surface and the weatherstrip is also damaged. If it moves sequentially along the space of the concave part of part 4 and is discharged out of the lip part 4 If so, the degree of scratching the glass surface should be reduced.

The pile 5 made of nylon monofilament or the like implanted in the lip portion 4 of the weather strip 1 can move the interposed foreign substances sequentially in one direction if the thickness and flexibility of the monofilament are appropriately selected. It is often used because it can be removed from the lip rather than staying in one place.

However, the flocking process for planting piles such as monofilament monofilaments involves many steps, such as primer application, drying, adhesive application, electrostatic loading of pile fibers, pile implantation, and drying. In addition to the complexity of inclusion, there are problems such as scattering of nylon single fibers, contamination of products, equipment and the environment by primers and adhesives, and difficulty in recycling. Improvement is desired. As a countermeasure, the development of a weatherstrip that does not require pile implantation is desired.

Products intended to replace nylon-flocked weatherstrips include a method in which rubber or resin particles are kneaded into a molding material to form irregularities on the lip surface, or a method using two types of thermoplastic resins with different melting points. Pre-kneaded, extruded and manufactured by forming irregularities on the surface, etc., and weather-strips without flocking are on the market. However, all of these products have a surface roughness of only 100 or less due to unevenness, and the shape of the unevenness is not always appropriate. It cannot be said that it has excellent scratch resistance and sealability. Therefore, the use of such weatherstrip products is limited to the use of weatherstrips for doors and inner surfaces that do not require such high performance. Under these circumstances, there has been a demand for the development of a product that has low sliding resistance without flocking and is superior to or better than pile-flocked products in dust removal, glass surface scratching, and sealing. .

Therefore, an object of the present invention is to eliminate the need for complicated and expensive steps such as the flocking process, and at the same time, to achieve the same slidability, dust removal, low and low glass surface scratching properties as a flocking product, Abrasion durability, flexibility, sealability, and excellent moldability SUMMARY OF THE INVENTION It is an object of the present invention to provide a weatherstrip without a flocking, particularly a weatherstrip for an outer surface of a door without a flocking, which can be formed from a thermoplastic resin composition or a thermoplastic elastomer composition used for a vehicle such as an automobile. Disclosure of the invention

The weatherstrip of the present invention comprises a main body attached to a vehicle and a lip portion abutting on a door and a window glass, and a thermoplastic resin composition or a thermoplastic elastomer is provided on a contact surface of the lip portion with the window glass. The composition is formed by extrusion molding to form a lip surface layer with specific properties, and the surface of the lip has a 10-point average roughness (Rz) as measured by, for example, a laser microscope. It is characterized in that the displayed surface roughness has a value of not less than 300 zm and not more than 500. The 10-point average roughness (R z) of the uneven shape of the lip surface layer portion is 300 m or more, and the area ratio (A) represented by the following formula (1) is 0.4 or more. It is preferable that it has a rough shape.

A = S z / S 0 …… (1) In this equation, S z is a valley in the virtual plane at a level of 0.6 R z from the peak of the 10-point average roughness (R z). The area of the facing part, S o, is the total area of the measurement range.

When the depth image measured and processed by the confocal laser microscope is represented as a three-dimensional image, the arrangement pattern of the irregularities on the surface of the lip surface layer is random, and the irregularities are not mountains arranged in a mountain-like shape. The coefficient of kinetic friction of the lip surface layer with respect to the glass surface is 0.35 or less, and the main body is made of a metal such as stainless steel or a resin core reinforced with fiber talc. It is further preferable that the resin composition or the thermoplastic elastomer composition is coated by extrusion molding.

Regarding the method for producing a weatherstrip for a vehicle without flocking according to the present invention, in the co-extrusion molding for forming the lip surface layer, the thickness of the lip surface layer is t (mm), and the lip of the two-color extrusion die is used. Surface layer formation When the die land length is L (mm), the value of L / t needs to be in the range of 20 to 200.

The vehicle weatherstrip without flock according to the present invention can simplify the manufacturing process because unevenness can be easily imparted by multicolor extrusion molding without flocking the nap pile, and performance equivalent to a flocked product can be obtained. This eliminates the scattering of nylon fibers and contamination by the adhesive, and the working environment is greatly improved. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a schematic sectional view of a weatherstrip without flocking according to the present invention.

FIG. 2 is an explanatory view showing a state in which the same weatherstrip according to the present invention as in FIG. 1 is attached to a door window glass.

FIGS. 3 (a) and (b) are schematic views showing a two-color die used in manufacturing a weatherstrip without flocking according to the present invention. FIG. 3 (a) is a schematic view of a two-color extrusion die. Fig. 3 is a schematic partial cross-sectional view perpendicular to the extrusion axis, and Fig. 3 (b) is a schematic cross-sectional view of the two-color extrusion die represented by a plane including the extrusion axis.

FIG. 4 is a schematic sectional view of a conventional flocking type weather strip. BEST MODE FOR CARRYING OUT THE INVENTION

According to the present invention, when the surface roughness of the lip surface layer provided on the surface of the lip of the weather strip is within a specific range, and moreover, there are many independent projections forming the unevenness, the glass surface is Based on the finding that the foreign matter drawn in gradually moves along the concave portion surrounding the convex portion and is removed to the outside of the lip portion, it is necessary to realize the conditions required for the concave and convex shape and to realize the conditions. As a result of intensive research on the manufacturing method, it was completed.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. The structure of the weatherstrip without flocking according to the present invention is, as shown in a schematic sectional view in FIG. 1, composed of a main body 3 and a lip 4 of a weatherstrip 1 having a core 2. Is basically the same as the conventional product shown in Fig. 4. The weatherstrip of the present invention is characterized in that a lip surface layer portion 6 having a specific property to come into contact with a glass surface is formed instead of planting a conventional nipper pile 5. As shown in FIG. 2, the weatherstrip 1 is attached to the window glass 7, particularly the inside and outside of the vehicle window glass 7 along the lip portions 4.

The material of the core material 2, the main body portion 3, and the lip portion 4 of the weather strip 1 may be a conventionally used material, and there is no particular limitation.

The material of the core material 2 is selected in consideration of the design standard of each vehicle manufacturer, the size and type of the vehicle, and may be any of a metal material such as stainless steel, a synthetic resin composition reinforced with fiber, talc, or the like. Good. Considering that it is more difficult to recycle if different materials are mixed, a product can be composed of a single type of resin composition without using a metal material for the core material 2.

The material of the main body portion 3 and the lip portion 4 of the weather strip 1 may be any of a thermoplastic resin composition such as a soft polyvinyl chloride resin composition and a thermoplastic elastomer composition, but the core material 2 is a synthetic resin. If it is manufactured, it is more preferable to select a material that is compatible with the material, since it enables integrated recycling.

The material for forming the concavo-convex shape constituting the lip surface layer portion 6 needs to be a material that can be co-extruded with the lip portion 4, and is preferably a material having good sliding properties with the glass surface.

The uneven shape of the surface of the lip surface part 6 is drawn into the lip part 4 and retains foreign substances such as water and dirt. It needs a function to discharge foreign matter from the outside.

In the conventional flocking process of the flocked weather strip, the nylon fiber with a bristle length of 500 to 800 m is electrostatically charged and pierces the adhesive layer applied to the lip surface. Hair is sucked and planted by electrostatic attraction. Therefore, the effective fluff length of the planted pile is 300 from m to 600 zm. However, the apparent pile length is further reduced because the pile is pushed down when the planted pile pile is pressed against the door and window glass with a predetermined load.

The sealing performance of the flocking type weather strip ゃ The performance of preventing foreign matter such as dust particles from being drawn in depends on the effective length of the pile and the degree of collapse during this pressure welding. In other words, the performance of the flocking type weatherstrip is not determined by the pile length as it is planted, but the apparent effective fluff length depending on the setting conditions installed in the vehicle, the dust removal property, window glass scratches Performance evaluation such as sticking property and sealing property is affected. Typical set load is from 300 g per 100 mm length of a single lip to 500 g at the maximum, and the deformation due to the set load is from 250 m to 3200 // m Which is about 35% to 50% of the pile length before setting.

Therefore, in the present invention for the purpose of providing a weather strip having the same performance as that of the flocking type weather strip, the unevenness of the surface of the lip surface layer portion 6 provided on the lip portion 4 of the weather strip without flocking is provided. If the surface roughness is expressed in terms of 10 point average roughness (Rz) and is in the range of 300 m to 500 m, preferably in the range of 300 m to 400 m, the nylon pile flocking product Dust removal performance, glass surface scratching performance, and sealing performance that are equal to or higher than those can be secured.

If the roughness R z exceeds 500 m, the drainage performance will be inferior, and the results of the abrasion test required by the exterior parts standards of each vehicle manufacturer, ie, the test sand (average particle size) Not satisfy the requirement that sand particles with a particle diameter of 180 to 200 zm, which are considered to be particularly inconvenient, of 30 to 200 // m of silica sand, should not be drawn in. become.

On the other hand, if the roughness R z of the uneven shape is smaller than 300 Atm, the glass surface is likely to be damaged in the evaluation test of the glass surface for scratching by repeatedly opening and closing the window glass with the test sand particles pulled in. In other words, it tends to be difficult to move the drawn test sand particles sequentially and remove them from the lip. The coefficient of friction of the non-flocked weatherstrip lip surface layer 6 against the glass surface is one of the important factors influencing the opening and closing performance of the window glass. In other words, if the coefficient of friction is large, a large starting torque is required for a window motor (not shown) for driving the opening and closing of the window glass, and the motor becomes inconveniently heavy. In this case, it is important not to increase the apparent coefficient of static friction due to adhesion or sticking between the glass surface and the lip surface layer. Although the dynamic friction coefficient is often specified in the standards for this type of component, it is preferable that the difference between the static friction coefficient and the dynamic friction coefficient is small, and in order to secure slidability comparable to nylon pile piled products. It is important that the coefficient of dynamic friction with respect to the glass surface is 0.35 or less, preferably 0.30 or less.

Regarding the uneven shape of the lip surface layer surface, it is important to minimize the contact area with the glass surface in order to reduce the sliding resistance. Making the shape of the protrusions of the irregular shape more irregular than that of the hemisphere and making the contact between the protrusions and the glass surface point-to-point reduces the sliding resistance, in addition to dust removal and scratches on the glass surface. It is also advantageous in terms of sex.

In this regard, it is preferable that the surface unevenness satisfies the following conditions. ^ That is, the roughness of the unevenness (Rz) at the depth of 0.6 Rz from the peak line is assumed. The area ratio (A = SzZSo) of the area (Sz) of the part of the plane facing the valley in a certain measurement range (Sz) to the total area (So) of the measurement range may be 0.4 or more. desirable.

If the value of A is less than 0.4, the ability to hold large dust and foreign particles having a particle size of 180 m to 200 xm is insufficient, and the glass surface is not easily scratched and the foreign matter is inferior. become.

Furthermore, if the shape of each peak constituting the unevenness is a spline shape or a mountain range shape, the discharging performance of foreign particles is inferior, so that the shape having randomly isolated mountain-shaped protrusions is preferable.

In the present invention, the 10-point average roughness (R z), the cross-sectional area (S z) within a certain measurement range of the cross section from the peak line of R z to the valley depth 0.6 R z, the measurement range of Total cross-sectional area (S o), the cross-sectional area of the peak when cut at the peak line of R z (S a), when the valley depth from the peak line of R z is 0.6 Rz As the cross-sectional area (S m) of the peak height, for example, a value obtained by measuring and processing with a confocal laser microscope such as Keyence VK850 model may be used.

The force required to open and close the door window glass depends on the area where the uneven surface of the lip surface layer 6 contacts the glass surface and the coefficient of friction of the material constituting the uneven surface that comes into contact with the glass surface against the glass surface. Therefore, it is advantageous that the uneven surface of the lip surface layer that comes into contact with the glass surface is sharply projected to reduce the contact area. In this case, it is preferable that the molding material for forming the uneven shape on the surface of the lip surface layer 6 is a composition containing irregularly shaped particles that do not melt or deform at the extrusion molding temperature or pressure. It is preferable that the irregular particles have a size of 300 m or more, have a welding property with the base material polymer of the forming material composition, and do not fall off from the base material due to shear stress. As such a material, crosslinked particles of a thermoplastic resin or a thermoplastic elastomer, pulverized particles of a thermoplastic resin, or particles of a thermosetting resin can be used.

These particle materials are pre-kneaded using a kneading machine together with a thermoplastic resin or a thermoplastic elastomer to be a binder, and the resulting mixture is mixed with a molding material for a body 3 and a lip 4 of a laser strip 1. By co-extrusion molding with a thermoplastic resin or a thermoplastic elastomer, a lip surface layer portion 6 having a required uneven shape is formed on the surface of the lip portion 4.

The main body part 3 and the lip part 4 of the weather strip 1 are formed of a soft polyvinyl chloride resin composition or a thermoplastic elastomer composition based on a polyolefin-based or polystyrene-based thermoplastic elastomer. On the other hand, it is preferable that the lip surface layer portion 6 in contact with the window glass surface is formed of a thermoplastic elastomer molding material composition having good slidability, but a desired uneven shape is imparted to the surface of the formed surface layer portion 6. For this purpose, crosslinked particles having good slidability are blended into the molding material composition. At the same time, by co-extrusion molding using a two-color co-extrusion die having a specific die dimension, the lip The desired uneven shape can be provided.

The overall structure of the two-color or multicolor extrusion die itself required to form the desired concavo-convex shape is the same as that of a molding die for forming a normal thermoplastic resin or thermoplastic elastomer by profile extrusion. It is not fundamentally different from the structure. However, in addition to the fact that the material for forming the uneven shape contains a large amount of cross-linked particles that do not melt at the molding temperature, and that the base polymer component has a sliding property at the temperature at which the base polymer component is in a molten state, it is generally used. While the molding die for a typical thermoplastic resin or thermoplastic elastomer composition has a dimension ratio L / t of 5 or 30, it is preferable to use a die having a large value. In the two-color extrusion molding die of the material forming the lip portion surface layer 6 in the weather strip of the present invention, the ratio L / t of the die land length (L) to the thickness (t) through which the surface layer forming material flows is less than 20. When the molding is performed under the following conditions, the uneven shape becomes too fine to obtain the desired uneven shape, so that the effects of weather stripping, abrasion resistance, and low glass surface scratch resistance can be sufficiently obtained. Absent. If the value of LZt exceeds 200, the irregularities with the desired roughness can be obtained, but the tips of the projections are crushed, and the irregularities with the pointed tips are not formed. In addition, the trash removal and sealing properties will be reduced. In order to obtain excellent performance, the L / t ratio of the die's dimension must be 20 to 200, and preferably, the L / t is 50 to 150.

FIGS. 3 (a) and 3 (b) show a main part of a two-color extrusion die used for manufacturing a weatherstrip for a vehicle without flocking according to the present invention. FIG. 3 (a) is a schematic partial sectional view of the two-color extrusion die perpendicular to the extrusion axis, and FIG. 3 (b) shows a cross section of the two-color extrusion die including the extrusion axis. FIG.

In FIG. 3 (b), a lip portion of the weather strip is extruded from right to left along arrow I, and a molding composition for forming a lip surface layer from above along arrow II on the way. Is supplied and co-extruded. In Fig. 3 (b), t indicates the thickness of the lip surface layer 6, and L indicates the die land length. You. Examples and comparative examples

Although not shown, two extruders were used for two-color extrusion. In this embodiment, the main body portion and the lip portion of the weather strip are extruded along the arrow II in FIG. 3 (b) with a first single screw extruder having a 30 mm diameter screw, and a two-color extrusion die (land) is used. In the middle of the length (L), the material for forming the lip surface layer is applied to the surface of the lip portion 4 using a second single screw extruder with a screw diameter of 20 mm so that the surface layer 6 having a thickness t is formed on the surface of the lip portion 4. Extrusion was performed along the arrow I in Fig. 3 (b) under the conditions shown in Fig. 3 (b). The material of the main body part 3 and the lip part 4 of the weather strip is a thermoplastic thermoplastic elastomer (trade name: TSE-7650 of Shin-Etsu Polymer Co., Ltd.), and the material of the lip surface part 6 in the embodiment is An olefin thermoplastic elastomer composition containing 30% by weight of crosslinked particles (trade name of Shin-Etsu Polymer Co., Ltd .: TSE-465X) was used.

A two-color co-extruded product for a simulation test was formed using an extrusion die having an L / t value of 125 in the die dimension. At this time, the surface of the lip was evaluated for the appearance of irregularities, slidability (static friction coefficient and dynamic friction coefficient against the glass surface), dust removal, abrasion resistance, glass surface scratching, and sealability (load 20%). 0 g), and the results are shown in Table 2. In Comparative Examples 1 and 2 shown in the same table, the lip surface layer forming material was the same as that of the main body, the same TSE-7650 or 60% by weight of cross-linked particles of an olefinic thermoplastic elastomer composition (Shin-Etsu Polymer) The product was manufactured under the same molding conditions as in the example except that the product name was TSE-4602X). Further, as a reference example, the same table shows the test results of conventional nylon pile type weather strips.

Since it was expected that the glass surface scratching property was strongly related to the Rz value of the uneven shape, the TSE-4605X or TSE-4602X described above was used as the surface layer forming material and a 20 mm extruder was used in the evaluation. Same as the example except that the rotation speed of Using the four types of dies with dimension ratios L / t of 15, 100, 150 and 250 under the same conditions, a single-layer lip with a surface thickness t of 0.40 mm was used. Extruded. The surface of the lip at this time was visually evaluated for the appearance of the uneven shape, and the results and Rz values are shown in Table 3. In the same table, A in the results of the visual evaluation of the shape of the projections indicates that the shape was good, and B indicates that the peak was crushed and the shape was somewhat poor.

Table 1 Lip body Lip surface layer Molding material TSE-7650 Test material Extruder 30 Hidden diameter 20 Sleeping diameter Barrel 160-180 160-180

Say

/ Dish

Nozzle 180 200 degrees

(.C) Die 200

Screw rotation speed

(rpm) 10-15 10-15

L / t ratio 125

Table 2 Examples Comparative example 1 Comparative example 2 Reference example Surface layer molding material TSE-4605X TSE-7650 Nylon

TSE-4602X Noire

R z (m) 350 30 520 600

S z / S o 0.56 0.15 0.45 0.75 Static friction coefficient 0.2618 0.3059 0.2712 0.2611 Dynamic friction coefficient 0.2318 0.2579 0.2518 0.196

Mouth Dust removal A C C A

No Abrasion resistance A C A

Comment

Value Glass Scratching ACAA Sealing AACA Foreign matter exclusion ACAA

Table 3

The test results shown in Table 2 were obtained by the following test methods.

(A) The friction coefficient was measured using a friction tester (Shinto Kagakusha, Haydon 141-D-ANL type).

1) A 5 Omm long test piece cut from the product was used for the measurement.

2) The test load was 200 g.

3) The test speed (removal speed) was measured at 10 Omm / min.

(B) The wear durability was evaluated by a simple wear test method proposed as a wear test method for lips of glass run channel products.

1) A 20 Omm long test piece cut from the product was used.

2) The test load corresponds to a friction element of 300 000 g / 5 cm square.

3) Regarding the test speed, the friction element was slid reciprocally in the horizontal direction at a moving distance of 14 Omm at a cycle of 60 to 66 times / min. The durability was evaluated according to the following three criteria based on the state of wear of the uneven shape after 500,000, 2000, 2000, 5000, and 100000 reciprocal slides. .

No wear is observed.

Slight wear,

Wear is clearly seen, (C) The evaluation of glass surface scratch resistance was carried out according to the abrasion resistance test method adopted by automobile manufacturers. Silica sand particles having a diameter of 185 to 200 m were inserted between the surface of the lip and the test surface, and after 100,000 reciprocal slides, the scratched state was recorded based on the following three criteria.

A: No scratch is found.

B: Slight scratches are observed.

C: Clearly scratched.

(D) Dust removal was evaluated by the following three criteria based on the results of measurement using a friction tester (Shinto Kagaku Co., Haydon 14-D-ANL type).

1) A 50 mm long test piece cut from the product was used.

2) The test load was measured in three stages: 100 g, 200 g, and 300 g.

3) The test speed was 100 mm / min.

4) Using two types of silica particles with a particle size of 20 to 30 m and a particle size of 180 to 200 ^ m, depending on the degree to which the silica particles are drawn into the lip by one movement of the lip. The trash removal property was evaluated.

A: No sand particles are drawn.

B: Slight retraction of sand grains is observed.

C: Retraction of sand grains is clearly observed.

(E) The sealability (drainability) was evaluated based on the results of measurement using a friction tester (Shinto Kagaku Co., Haydon 141-D-ANL type) according to the following three criteria.

1) A 50 mm long test piece cut from the product was used.

2) The test and test loads were set in three stages: 100 g, 200 g, and 300 g. 3) The test speed was 10 OmmZ minutes.

4) 0.3 ml of water was dropped on the glass surface, and the lip was moved only once, and the water was wiped off by the lip and evaluated. A: Good wiping of water droplets.

B: There is a little water left behind.

C: There is noticeable water remaining after wiping.

The following conclusions can be drawn from Tables 2 and 3. That is,

1) As can be seen from Table 2, the desired product performance is hardly expected if the average roughness (Rz) force of the irregularities on the lip surface layer is less than S300m. If it exceeds 500, the abrasion resistance and the flaw resistance on the glass surface are satisfied, but the dust-removing property and the sealing property deteriorate. If Rz is not less than 300 m and not more than 500 m, the performance required for the product will not be satisfied for all test items.

2) As can be seen from Table 3, the relationship between the L / t value in the die dimension and the concave / convex shape was determined by using two types of surface layer forming material compositions having different contents of crosslinked particles. The value of L / t at which the Rz value of m or more is obtained is 100 to 150.When the value of L / t is 250, the peak of the peak is crushed and a sharp pointed projection cannot be obtained. . Industrial potential

The present invention relates to a vehicle weatherstrip without flocking and a method for manufacturing the same, and has the same performance as a flocking type weatherstrip without the need for complicated and expensive processes such as flocking. A weather strip exhibiting slidability, dust removal, low glass surface scratch resistance, abrasion durability, flexibility, and sealing properties is provided. In addition, since it can be efficiently manufactured using a thermoplastic resin composition or a thermoplastic elastomer composition having excellent moldability, a high-performance and inexpensive weatherstrip used for automobiles and the like, especially a window without flocking. Since the weather strip for the outer glass surface is provided, the industrial utility of the present invention is great.

Claims

The scope of the claims

1. A weatherstrip for a vehicle in which at least one lip portion is integrated with a main body portion attached to a vehicle and a door and a window glass surface, and is in contact with a glass surface of the lip portion. A lip surface layer portion made of a thermoplastic resin composition or a thermoplastic elastomer composition is formed on the surface, and the surface of the surface layer portion has a 10-point average surface roughness Rz of 300 to 500 m. A weatherstrip for a vehicle without flocking, characterized by having a concave-convex shape.

2. The area of the part of the surface of the lip surface facing the valley within the measurement range of the virtual plane at a level below 0.6 Rz from the summit line, where the 10-point average surface roughness is Rz. 2. The weatherstrip for a vehicle according to claim 1, wherein the weatherstrip has a concavo-convex shape in which a ratio Sz / So of Sz to the total area So of the measurement range is 0.4 or more.

3. The weatherstrip for a vehicle according to claim 1, wherein the distribution of the peak-top protrusions in the uneven shape of the lip surface layer portion is a random arrangement.

4. The weatherstrip for a vehicle according to claim 1, wherein a dynamic friction coefficient of the surface of the lip surface layer with respect to a glass surface does not exceed 0.35.

5. The coating layer / core composite structure in which the main body is covered with a core material made of a metal or a reinforced polymer material with a coating layer made of a thermoplastic resin composition or a thermoplastic elastomer composition. A vehicle weather strip according to claim 1 comprising:

6. The first molding composition for forming the main body and the lip portion is supplied to the first extruder, and the second molding composition for forming the lip surface layer in the second extruder. The method for producing a weatherstrip for a vehicle according to claim 1, wherein the two-color extrusion die has a shape of a die land length L and a thickness of a lip surface layer portion. A method for manufacturing a weatherstrip for a vehicle, wherein the shape has a ratio L / t of t in the range of 20 to 200.

7. The method of manufacturing a weatherstrip for a vehicle according to claim 6, wherein the ratio LZt is in a range of 50 to 150.