KR102260035B1 - A composition for weather strip for vehicle and weather strip for vehicle prepared using the same - Google Patents

Abstract

The present invention relates to a composition for a vehicle weather strip and a vehicle weather strip manufactured using the same. In one embodiment, the composition for a vehicle weather strip comprises 100 parts by weight of ethylene-propylene-diene (EPDM) rubber; 80-140 parts by weight of carbon black; 30 to 80 parts by weight of an emollient; 20-50 parts by weight of inorganic filler; and 3 to 15 parts by weight of a thermally expansible foaming agent.

Description

A composition for a vehicle weather strip and a vehicle weather strip manufactured using the same {A COMPOSITION FOR WEATHER STRIP FOR VEHICLE AND WEATHER STRIP FOR VEHICLE PREPARED USING THE SAME}

The present invention relates to a composition for a vehicle weather strip and a vehicle weather strip manufactured using the same. More specifically, the present invention relates to a composition for a vehicle weather strip suitable for use in a vehicle weather strip due to excellent lightness and mechanical strength, and a vehicle weather strip manufactured using the same.

The weather strip of a vehicle is installed in the vehicle door and trunk room, etc. to block the inflow of noise, moisture and various foreign substances from the outside, to increase the heating and cooling efficiency of the vehicle, and to absorb shock when the door is closed. , It also serves to prevent vibration of the door or trunk lid while driving.

The weather strip for a vehicle is slightly different depending on the applied part, but airtightness, lightness, mechanical strength and appearance are required.

Background art related to the present invention is disclosed in Korean Patent Application Laid-Open No. 2015-0095398 (published on August 21, 2015, title of the invention: weather strip composition and weather strip using the same).

An object of the present invention is to provide a composition for a vehicle weather strip excellent in appearance, mechanical strength, light weight and dimensional stability.

Another object of the present invention is to provide a composition for a vehicle weather strip excellent in mixing properties, dispersibility and moldability of the composition.

Another object of the present invention is to provide a composition for a vehicle weather strip that can be easily mounted and removed from the vehicle.

Another object of the present invention is to provide a composition for a vehicle weather strip excellent in productivity, reliability and economy.

Another object of the present invention is to provide a vehicle weather strip manufactured using the composition for a vehicle weather strip.

One aspect of the present invention relates to a composition for a vehicle weatherstrip. In one embodiment, the composition for a vehicle weather strip comprises 100 parts by weight of ethylene-propylene-diene (EPDM) rubber; 80-140 parts by weight of carbon black; 30 to 80 parts by weight of an emollient; 20-50 parts by weight of inorganic filler; and 3 to 15 parts by weight of a thermally expansible foaming agent, wherein the thermally expansible foaming agent comprises: a thermoplastic polymer shell; and a hydrocarbon-based compound enclosed in the shell.

In one embodiment, the EPDM rubber has a Mooney viscosity (ML 1+4 100° C.) of 80 to 95, an ethylidene norbornene (ENB) content of 2 to 10% by weight, and an ethylene content of 65 to 85 % by weight.

In one embodiment, the inorganic filler may include at least one of silica (silica), magnesium carbonate (MgCO ₃ ), titanium dioxide (TiO ₂ ), barium sulfate (BaSO ₄ ), talc (talc), and calcium carbonate (CaCO ₃ ). can

In one embodiment, the inorganic filler, the softener, and the carbon black may be included in a weight ratio of 1:1.5-3:2-7.

In one embodiment, the composition comprises 0.5 to 20 parts by weight of a processing aid based on 100 parts by weight of the EPDM rubber; and 0.5 to 20 parts by weight of an active agent; It will further include one or more of, the processing aid includes at least one of stearic acid and polyalkylene glycol, and the active agent includes at least one of zinc oxide (ZnO), zinc carbonate, magnesium oxide (MgO) and lead oxide. can

In one embodiment, the composition has a specific gravity of 0.7 to 0.95 measured based on ASTM D 792 standard, and a tensile strength of 100 to 150 kgf/cm ^{2 measured based on ASTM D 412 standard} and the elongation measured according to ASTM D 412 may be 180 to 300%.

Another aspect of the present invention relates to a vehicle weatherstrip manufactured using the composition for a vehicle weatherstrip. In one embodiment, the vehicle weather strip is formed in a cross-sectional shape of an inverted 'U', the carrier part having a metal member inserted therein; a tube part formed on one side of the carrier part and including a hollow part inside; and a trim rib part protruding obliquely from the other side of the carrier part, wherein at least one of the carrier part and the trim rib part is formed using the composition for a vehicle weather strip.

In one embodiment, at least one of the carrier part and the trim rib part is formed with a closed cell having an average diameter of 90 μm or less, and a foaming rate: 25 to 35%.

The composition for a vehicle weather strip according to the present invention is excellent in appearance, mechanical strength, light weight and dimensional stability, has excellent mixability, dispersibility and moldability of the composition, is easy to mount and remove from a vehicle, and has productivity and reliability. and economical efficiency.

1 schematically shows a cross-section of a weatherstrip according to an embodiment of the present invention.
2 is an optical micrograph showing a cross section of Example 1.
3 is an optical micrograph showing a cross section of Comparative Example 1. FIG.
4 is an optical micrograph showing the surface of Example 1.
5 is an optical micrograph showing the surface of Example 2.
6 is an optical micrograph showing the surface of Example 3.

In the description of the present invention, if it is determined that a detailed description of a related known technology or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

And the terms to be described later are terms defined in consideration of functions in the present invention, which may vary depending on the intention or custom of the user or operator, and the definition should be made based on the content throughout this specification describing the present invention.

vehicle for weather strip composition

One aspect of the present invention relates to a composition for a vehicle weatherstrip. In one embodiment, the composition for a vehicle weather strip comprises 100 parts by weight of ethylene-propylene-diene (EPDM) rubber; 80-140 parts by weight of carbon black; 30 to 80 parts by weight of an emollient; 20-50 parts by weight of inorganic filler; and 3 to 15 parts by weight of a thermally expansible foaming agent, wherein the thermally expansible foaming agent comprises: a thermoplastic polymer shell; and a hydrocarbon-based compound enclosed in the shell.

Hereinafter, the components of the vehicle weather strip composition will be described in more detail.

EPDM Rubber

The ethylene-propylene-diene (EPDM) rubber is included in order to secure mechanical properties such as hardness, tensile strength and elongation of the present invention.

In one embodiment, the EPDM rubber may have a Mooney viscosity (ML 1+4 100° C.) of 80 to 95. Within the above range, the composition of the present invention may have excellent weather resistance, mechanical properties, processability and extrudability.

In one embodiment, the EPDM rubber may contain an ethylidene norbornene (5-ethylidene-2-norbornene, ENB) content of 2 to 10% by weight. When included in the above content range, the composition may have excellent appearance, processability and mechanical properties.

In one embodiment, the EPDM rubber may contain 65 to 85% by weight of ethylene. In the ethylene content, the processability and mechanical properties of the composition may be excellent.

carbon black

The carbon black improves the insertion and removal of the weather strip, and is included for the purpose of improving the rubber modulus.

In one embodiment, the carbon black may have an average particle diameter of 0.01 to 10 μm. Mixability and dispersibility of the composition may be excellent in the above range.

In one embodiment, the carbon black is included in an amount of 80 to 140 parts by weight based on 100 parts by weight of the EPDM rubber. When the carbon black is included in an amount of less than 80 parts by weight, the hardness of the composition is lowered, thereby increasing the manufacturing cost and thus economical efficiency is reduced. When it is included in an amount exceeding 140 parts by weight, the composition hardness is increased due to a relative decrease in the EPDM content, The elongation may be lowered. For example, 95 to 130 parts by weight may be included. For another example, 100 to 120 parts by weight may be included.

emollient

The softening agent is included to improve processability during compounding or extrusion of the composition including the EPDM rubber. In one embodiment, the emollient may include a paraffin-based emollient.

In one embodiment, the softening agent may be included in an amount of 30 to 80 parts by weight based on 100 parts by weight of the EPDM rubber. When the softener is included in an amount of less than 30 parts by weight, workability is deteriorated, and when it is included in an amount exceeding 80 parts by weight, mechanical properties such as hardness may be deteriorated. For example, 40 to 70 parts by weight may be included. For another example, 45 to 65 parts by weight may be included.

inorganic filler

The inorganic filler is included to realize the low specific gravity characteristics of the weather strip composition of the present invention.

In one embodiment, the inorganic filler may include at least one of silica (silica), magnesium carbonate (MgCO ₃ ), titanium dioxide (TiO ₂ ), barium sulfate (BaSO ₄ ), talc (talc), and calcium carbonate (CaCO ₃ ). can

In one embodiment, the inorganic filler may have an average particle diameter of 0.1-50 μm. Mixability and dispersibility of the composition may be excellent in the above range.

In one embodiment, the inorganic filler may be included in an amount of 20 to 50 parts by weight based on 100 parts by weight of the EPDM rubber. When the inorganic filler is included in an amount of less than 20 parts by weight, the surface roughness of the composition increases after extrusion molding, and the appearance decreases and the cost increases, and when it includes more than 50 parts by weight, mechanical properties may be reduced due to excessive filling. . For example, 25 to 45 parts by weight may be included. In another example, 30 to 40 parts by weight may be included.

In one embodiment of the present invention, the inorganic filler, the softener, and the carbon black may be included in a weight ratio of 1:1.5 to 3:2-7. When included in the above mixing weight ratio, the composition of the present invention may have excellent mixability, dispersibility, and extrudability, and excellent appearance, hardness, and mechanical properties of the composition. For example, it may be included in a weight ratio of 1:1.5-2:2.5-4.

thermal expansion blowing agent

The thermally expansible foaming agent forms a closed cell when manufacturing the weather strip of the present invention, so it has excellent appearance, dimensional stability, and light weight, and cells and metal members (core metal) generated during the manufacture of the carrier part of the weather strip. ) and is included for the purpose of improving basic physical properties.

In the case of manufacturing a composition by foaming by applying a conventional chemical blowing agent component, an irregular distribution of open cells is formed in the matrix resin, and the above-described metal member floats, and dimensional stability is reduced. However, when the thermally expansible foaming agent of the present invention is applied, the above problems can be solved.

In one embodiment, the thermally expandable foaming agent comprises a thermoplastic polymer shell; and a hydrocarbon-based compound enclosed in the shell.

The thermoplastic polymer shell may include at least one of an acrylic copolymer, a vinylidine chloride copolymer, and an acrylonitrile copolymer.

In one embodiment, the hydrocarbon-based compound may be a liquid, unsaturated hydrocarbon at room temperature. For example, one or more of heptane, isoheptane, octane, isooctane and isododecane may be included.

The thermally expandable foaming agent may have a foaming initiation temperature of 80 to 200°C. The shell is destroyed at the foaming start temperature, and foaming is made by the hydrocarbon-based compound encapsulated therein to form an independent cell of a uniform size.

In one embodiment, the average particle diameter of the thermally expansible foaming agent may be 1 ~ 50㎛. Mixability and dispersibility of the composition may be excellent in the above range. In one embodiment, the thickness of the shell may be 2 ~ 15㎛. In the above range, the foaming efficiency may be excellent.

In one embodiment, the thermally expandable foaming agent is included in an amount of 3 to 15 parts by weight based on 100 parts by weight of the EPDM rubber. When the thermally expansible foaming agent is included in less than 3 parts by weight, sufficient foaming is difficult to reduce lightness, and when it contains more than 15 parts by weight, the extruder load is increased during extrusion molding due to over-foaming, and the appearance or mechanical properties of the composition this may be lowered. For example, 5 to 12 parts by weight may be included. For another example, 7 to 11 parts by weight may be included.

In one embodiment, the composition for a vehicle weather strip may further include at least one of a processing aid and an active agent.

processing aid

The processing aid may be included to improve the flowability and dispersibility of the composition. In one embodiment, the processing aid may include at least one of stearic acid and polyalkylene glycol. For example, the processing aid may include the polyalkylene glycol and stearic acid in a weight ratio of 1:2 to 1:4. Under the above conditions, compatibility, dispersibility and moldability of the composition may be excellent.

In one embodiment, the processing aid may be included in an amount of 0.5 to 20 parts by weight based on 100 parts by weight of the EPDM rubber. When included in the above range, the composition may have excellent compatibility and dispersibility without deterioration of mechanical properties. For example, 0.5 to 5 parts by weight may be included.

activator

The active agent is included for the purpose of improving the processability of the present invention. The activator may include at least one of zinc oxide (ZnO), zinc carbonate, magnesium oxide (MgO), and lead oxide.

In one embodiment, the active agent may have a particle diameter of 0.1 to 30 μm. In the above range, dispersibility and miscibility may be excellent.

In one embodiment, the active agent may be included in an amount of 0.5 to 20 parts by weight based on 100 parts by weight of the EPDM rubber. When it is included in the above range, the mechanical properties of the composition are not deteriorated and processability may be excellent. For example, 1 to 6 parts by weight may be included.

In one embodiment, the composition may have a specific gravity of 0.7 to 0.95 as measured based on ASTM D 792 standard. For example, the specific gravity may be 0.7 to 0.8.

In one embodiment, the composition may have a hardness of HS75 to 85. In one embodiment, the hardness may be measured according to ASTM D 2240A standard using a hardness measuring instrument (product of TECLOCK).

In one embodiment, the composition has a tensile strength of 100 to 150 kgf/cm ^{2 measured based on ASTM D 412 standard.} and the elongation measured according to ASTM D 412 may be 180 to 300%. For example, the composition has a tensile strength of 110 to 135 kgf/cm ² and the elongation may be 190 to 280%.

The composition for a vehicle weather strip according to the present invention is excellent in appearance, mechanical strength, light weight and dimensional stability, has excellent mixability, dispersibility and moldability of the composition, is easy to mount and remove from a vehicle, and has productivity and reliability. and economical efficiency.

vehicle for weather strip Vehicles manufactured using the composition weather strip

Another aspect of the present invention relates to a vehicle weatherstrip manufactured using the composition for a vehicle weatherstrip. 1 schematically shows a cross-section of a weatherstrip according to an embodiment of the present invention. Referring to FIG. 1 , the weather strip 100 is formed in a 'U'-shaped or reverse 'U'-shaped cross-sectional shape to be fixed to the side body of a vehicle body, etc., and a carrier in which the metal member 22 is inserted. part 20; a tube portion 10 formed on one side of the carrier portion 20 and including a hollow portion therein; and a trim rib part 30 which is inclinedly protruding from the other side of the carrier part.

In one embodiment, at least one of the carrier portion 20 and the trim rib portion 30 is formed using the aforementioned composition for a vehicle weatherstrip. In one embodiment, the tube portion 10 may be formed using a sponge rubber composition.

In one embodiment, the protrusion 24 may be formed to protrude obliquely to the inner surface of the carrier part 20 so that the carrier part 20 can be fixed to the side body of the vehicle body.

At least one of the carrier part and the trim rib part is formed with an independent cell (closed cell) having an average diameter of 90 µm or less, and a foaming rate: 25 to 35%. For example, free-standing cells with an average diameter of 40 to 85 μm may be formed.

vehicle weather strip Manufacturing method

Another aspect of the present invention relates to a method of manufacturing a vehicle weatherstrip.

In one embodiment, the vehicle weather strip manufacturing method comprises the steps of manufacturing an extruded body; 1st vulcanization step; and a secondary vulcanization step. For example, in the vehicle weather strip manufacturing method, a vehicle weather strip composition including the above-described components and contents is introduced into an extruder and extruded to manufacture an extruded body; The extruded body is transferred to a two-stage UHF (Ultra High Frequency) facility and sequentially passed through to first vulcanize it to a surface temperature: 140 to 165° C.; And transferring the first vulcanized extrudate to a three-stage HAV (Hot Air Vulcanization) facility and sequentially passing it through the surface temperature: heating to 180 ~ 200 ℃ to secondary vulcanization; may include.

In one embodiment, when the extruded product is manufactured, it may be manufactured by extruding it on the surface of the metal member. For example, the surface temperature of the extruded article may be extruded under the conditions of 100 ~ 120 ℃.

The UHF equipment performs primary vulcanization by heating the extruded body through a microwave, and during the first vulcanization, foaming of the extruded body occurs and vulcanization may occur partially. In a specific embodiment, the UHF equipment consists of two stages, and the surface temperature of the extruded body may be 140 to 165° C. when passing through the two stages of the UHF equipment. Foaming and partial vulcanization can be easily made under the above conditions.

The HAV facility burns gas to heat the extrudate to perform secondary vulcanization, and during the secondary vulcanization, the primary vulcanized extrudate can be completely vulcanized. In addition, the independent cell according to the present invention may be formed in the extruded body during the secondary vulcanization. In one embodiment, the HAV equipment consists of three stages, and the surface temperature of the extruded body may be 180-220° C. when the three-stage HAV passes. Under the above conditions, while the free-standing cell of the present invention is easily formed, complete vulcanization can be achieved.

In one embodiment, a cooling process may be further performed to prevent post vulcanization (curing) of the extruded product on which the secondary vulcanization is completed.

Hereinafter, the configuration and operation of the present invention will be described in more detail through preferred embodiments of the present invention. However, this is presented as a preferred example of the present invention and cannot be construed as limiting the present invention in any sense. Content not described here will be omitted because it can be technically inferred sufficiently by a person skilled in the art.

Example and comparative example

Components used in the Examples and Comparative Examples are as follows.

(A) Ethylene-propylene-diene (EPDM) rubber: Mooney viscosity (ML 1+4 100°C) of 90, ethylidene norbornene (ENB) content of about 6% by weight, and ethylene content of 73% by weight % EPDM rubber (KEP282, Kumho Polycam) was used.

(B) Carbon black: Orion's N-550 was used.

(C) Softener: A paraffin-based softener (M1460D, Michang Petrochemical) was used.

(D) Inorganic filler: Calcium carbonate (BK04, Dongho calcium) was used.

(E) Processing aid: (E1) Stearic acid (LG Chem) was used. (E2) Polyethylene glycol (PEG 4000, Hannong Chemical Co., Ltd.) was used.

(F) Activator: ZnO was used.

(G1) p,p'-oxybis (benzenesulfonylhydrazide (p,p'-Oxybis(benzenesulfonylhydrazide)), Kumyang Chemical Co., Ltd.) was used as a foaming agent.

(G2) A foaming agent (MBF-48EP60, Matsumoto Corporation) containing a thermoplastic polymer (acrylonitrile-based copolymer) shell and a hydrocarbon-based compound (isooctane) encapsulated in the shell was used as a thermally expandable foaming agent.

Example 1-3 and comparative example 1 to 9

After welding the iron core, bending molding was performed to prepare a metal member. And after applying the components and contents of Table 1 below and mixing by a known method, put into an extruder of Φ = 90mm, cylinder cooling water temperature: 60 ℃ and surface temperature when passing through the extrusion mold: 110 ℃ condition of the metal member Extruded on the surface to prepare an extruded article. Then, the extruded product is transferred to a two-stage UHF (Ultra High Frequency) facility and passed through sequentially, heated to a surface temperature: 140 to 165° C., and then vulcanized and foamed, and then the first vulcanized extruded product is Transfer to a three-stage HAV (Hot Air Vulcanization) facility, pass it sequentially, heat it to a surface temperature of 180 ~ 200 ° C, and then cool it for secondary vulcanization, and then cool the vehicle weather strip (carrier part 20 or trim rib in FIG. 1 ) Part 30) was prepared.

Physical property evaluation

The vehicle weather strips of Examples 1 to 3 and Comparative Examples 1 to 9 were evaluated for physical properties in the following manner.

(1) Appearance: For Examples and Comparative Examples, foamed appearance and surface texture were tested according to Hyundai-Kia Motors spec MS261-27, and the following four criteria were evaluated (◎: very good, ○: excellent, △: Normal, X: Poor).

(2) Hardness: It was measured according to ASTM D 2240A standard using a hardness measuring instrument (product of TECLOCK).

(3) Tensile strength (kgf/cm ² ): It was measured according to ASTM D 412 standard.

(4) Elongation (%): It was measured according to ASTM D 412 standard.

(5) Foaming rate (%): Remove air bubbles to a thickness of about 1 mm from the 8˝-test ROLL, put it in an oven (180°C) and leave it for 4 minutes, then measure the change in specific gravity of the specimen before and after putting it in the oven did. The specific gravity was measured by cutting a portion without air in the specimen.

(6) Cell size (μm): It was measured using a scanning electron microscope (SEM).

(7) Specific gravity: measured at room temperature (23° C.) according to ASTM D 792 standard.

(8) Moldability: At the time of extrusion molding of the composition, the extruder load and agglomeration of the composition components were investigated and evaluated according to the following four criteria (◎: very good, ○: excellent, △: average, X: bad).

Referring to the results of Tables 2 and 3, it was found that in Examples 1 to 3 of the present invention, the appearance quality was excellent, and excellent mechanical properties and low specific gravity were implemented, so that it was easy to mount and assemble in a vehicle. . In addition, Examples 2 to 3 showed an excellent foaming rate of 30% or more compared to Comparative Examples using a general foaming agent, and it was possible to reduce the weight of the product, and it was confirmed that the cell size was small and the foam was densely low.

On the other hand, in Comparative Examples 1 to 3 to which a foaming agent different from the present invention was applied, the appearance or mechanical properties were lowered than in Examples 1 to 3, the average cell size was increased, the open cells were irregularly formed, and the In the case of Comparative Examples 4 to 9 out of the composition content range, it was found that the mechanical strength and moldability were lowered compared to Examples 1 to 3.

2 is an optical micrograph of the cross section of Example 1 magnified by 50 times, and FIG. 3 is an optical micrograph of the cross section of Comparative Example 1 magnified by 50 times. Referring to the results of FIGS. 2 and 3 , in the case of the weather strip of Example 1 of the present invention, independent cells of 70 μm or less were uniformly formed, and the reinforcing member inserted into the carrier part did not lift, but in Comparative Example 1 In this case, the open cell was irregularly formed, and the reinforcing member inserted into the carrier part of Comparative Example 1 was lifted.

4 is an optical micrograph magnified 200 times the surface of Example 1, FIG. 5 is an optical micrograph magnified 200 times the surface of Example 2, and FIG. 6 is a 200 times magnification of the surface of Example 3 It is an optical micrograph. 4 to 6, in the case of Examples 1 to 3, it was found that the foaming efficiency was excellent, and the surface quality was excellent. In particular, the expandability due to the foaming of the thermally expansible foaming agent was excellent, the dimensional stability was excellent due to the formation of independent cells, and there was no length contraction. In addition, in the case of the weather strips of Comparative Examples 1 to 3, a change occurs over time after vulcanization, resulting in surface gloss, but it was found that the surface of the weather strips of Examples 1 to 3 had a fine rough texture and a matte effect. could Due to the surface properties, it was found that the color change stability due to illuminance scattering was excellent, and black could always be maintained without discoloration such as blueish and reddish.

Simple modifications or changes of the present invention can be easily carried out by those of ordinary skill in the art, and all such modifications or changes can be considered to be included in the scope of the present invention.

10: tube portion 20: carrier portion
22: metal member 24: protrusion
30: trim rib part 100: weather strip

Claims (8)

100 parts by weight of ethylene-propylene-diene (EPDM) rubber;
80-140 parts by weight of carbon black;
30 to 80 parts by weight of an emollient;
20-50 parts by weight of inorganic filler; and
A composition for a vehicle weather strip comprising; 3 to 15 parts by weight of a thermally expansible foaming agent,
The inorganic filler, softener, and carbon black are included in a weight ratio of 1:1.5-2:2.5-4,
The EPDM rubber has an ethylene content of 65 to 85% by weight,
The thermally expandable foaming agent may include a thermoplastic polymer shell; and a hydrocarbon-based compound enclosed in the shell,
The composition has a specific gravity of 0.7 to 0.95 measured according to ASTM D 792,
The hardness measured according to ASTM D 2240A standard is HS 77~82,
A composition for a vehicle weather strip, characterized in that the tensile strength measured according to ASTM D 412 is 100 to 150 kgf/cm ² , and the elongation measured according to ASTM D 412 is 180 to 300%.
The vehicle weather strip according to claim 1, wherein the EPDM rubber has a Mooney viscosity (ML 1+4 100° C.) of 80 to 95, and an ethylidene norbornene (ENB) content of 2 to 10% by weight. composition.
According to claim 1, wherein the inorganic filler is at least one of silica (silica), magnesium carbonate (MgCO ₃ ), titanium dioxide (TiO ₂ ), barium sulfate (BaSO ₄ ), talc (talc) and calcium carbonate (CaCO ₃ ) A composition for a vehicle weather strip comprising:
delete According to claim 1, wherein the composition,
0.5 to 20 parts by weight of a processing aid based on 100 parts by weight of the EPDM rubber; and 0.5 to 20 parts by weight of an active agent; It further comprises one or more of
The processing aid includes at least one of stearic acid and polyalkylene glycol,
The active agent is a vehicle weather strip composition comprising at least one of zinc oxide (ZnO), zinc carbonate, magnesium oxide (MgO) and lead oxide.
delete It is formed in an inverted 'U'-shaped cross-sectional shape, the carrier portion is inserted into the metal member;
a tube part formed on one side of the carrier part and including a hollow part inside; and
and a trim rib part protruding obliquely to the other side of the carrier part;
At least one of the carrier part and the trim rib part is a vehicle weather strip, characterized in that it is formed using the composition for a vehicle weather strip according to any one of claims 1 to 3 and 5.
The vehicle weather strip according to claim 7, wherein at least one of the carrier part and the trim rib part has closed cells having an average diameter of 90 µm or less, and a foaming rate: 25 to 35%.

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