JP4535609B2 - Opening trim or opening weather strip - Google Patents

Description

【００２６】
【表２】

【００２７】
表１及び表２から明らかなように、成分（e)が５重量部未満であると、摩耗量が増大し、耐摩耗性が低下する。（比較例２参照）
一方、成分（e)が１００重量部を超えると、光沢度が低下し、外観が悪化すると共に材料費が増大することが確認された。（比較例３参照）
【図面の簡単な説明】
【図１】本発明に基づくオープニングトリムの要部を示す横断面図である。
【図２】本発明に基づく他のオープニングウェザストリップの要部を示す横断面図である。
【図３】本発明に基づく別のオープニングトリムの要部を示す横断面図である。
【図４】本発明に基づく更に別のオープニングウェザストリップの要部を示す横断面図である。
【図５】乗用車のドア周辺を示す側面図である。
【図６】従来のオープニングトリムの要部を示す横断面図である。
【符号の説明】
１ 従来のオープニングトリム
２ トリム躯体部
３ 把持リップ部
ＩＭ インサートメタル
ＢＦ ボディフランジ
１０ 本発明のオープニングトリム又はオープニングウェザストリップ
１１ トリム躯体部
１２ 把持リップ部
１３ 中空状シール部
１４ 外層部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an opening trim or an opening weather strip, and more particularly, to an opening trim or an opening weather strip having an improved structure of a trim portion that seals, decorates and protects the periphery of a door opening.
[0002]
[Prior art]
As shown in FIGS. 5 and 6, the vicinity of the door opening portion of the front door FD and the rear door RD in the conventional passenger car is sealed, decorated and protected by the opening trim 1 attached to the body flange BF. That is, the conventional opening trim 1 includes a trim housing portion 2 having a substantially U-shaped cross section, and a plurality of gripping lip portions 3 projecting from the inner side surfaces of the trim housing portions 2 facing toward the center. The trim housing portion 2 and the insert metal IM integrally formed as a core material are provided.
In order to improve the sealing performance, an opening weather strip in which a seal portion is appropriately provided on a part of the outer peripheral surface of the trim housing portion 2 is also used as necessary.
[0003]
The main molding component of the trim housing part 2 is usually polyvinyl chloride. However, in recent years, replacement with thermoplastic elastomers, particularly olefin-based elastomers, has been studied as a countermeasure against harmful gases generated during recycling or incineration. I came. Since the function imposed on the trim housing part 2 is exclusively decoration and protection around the door opening, in order to improve the appearance and wear resistance of the outer peripheral surface, the wear amount is 0.01 g. In addition, the gloss is required to be 5 to 20 (gloss), and in addition, a low specific gravity material is also required for weight reduction.
[0004]
[Problems to be solved by the invention]
However, the trim housing portion 2 in the conventional opening trim 1 has a hardness (hereinafter simply referred to as hardness) in accordance with JIS K 6253 type (A) in order to maintain the same degree of flexibility as conventional polyvinyl chloride. When the olefin elastomer having a hardness of 60 to 75 is used, the wear resistance is inferior to that of the polyvinyl chloride. On the other hand, when the olefin elastomer having a hardness of 80 or more is used to increase the wear resistance, the flexibility is improved. The difficulty that the insertion force with respect to the body flange BF decreases and the mounting resistance with respect to the body flange BF increases is not solved. Further, the olefin elastomer has a poor appearance because it has a lower gloss than the polyvinyl chloride.
[0005]
An object of the present invention is to provide an opening trim or an opening weather strip that solves the above-described problems of the prior art and is excellent in appearance, wear resistance, and weight reduction.
[0006]
[Means for Solving the Problems]
Such an object of the present invention is to provide at least a part of the outer layer; (a) at least two polymer blocks (A) mainly made from vinyl aromatic compounds and at least one polymer block mainly made from conjugated diene compounds 100 parts by weight of a block copolymer comprising (B) and / or a block copolymer obtained by hydrogenation thereof, (b) 40 to 200 parts by weight of a non-aromatic rubber softener, (c 5) to 300 parts by weight of a copolymer mainly composed of polyethylene or ethylene polymerized by a single site catalyst, and (d) 5 to 200 parts by weight of a copolymer mainly composed of polypropylene or propylene. A modification in which the total amount of (a), (b) and (d) and a part of component (c) are previously melted and kneaded, and then or simultaneously modified with a group capable of reacting with a hydroxyl group, a carboxyl group or an amino group 5 to 100 parts by weight of the component (e) comprising a copolymer mainly composed of a reolefin resin or a modified olefin is melt-kneaded with the component (g) organic peroxide thereafter or simultaneously, and then (II) is obtained. In the opening trim or opening weather strip, which is a styrene-based thermoplastic elastomer composition having a hardness of 55 to 90, produced by a method of melt-kneading the product after melt-kneading and the remainder of component (c), a modified polyolefin modified with a group capable of reacting with a hydroxyl group, a carboxyl group or an amino group when the total amount of a), (b) and (d) and a part of the component (c) are previously melt-kneaded. In addition, 5 to 100 parts by weight of a copolymer mainly composed of a base resin or a modified olefin was also added. Achieved.
[0007]
Further, the object of the present invention is to provide an opening trim or opening characterized in that at least the trim housing part and the gripping lip part of the opening trim or opening weatherstrip are made of an olefin-based thermoplastic elastomer composition having a hardness of 55 to 75. Accomplished by weatherstrip.
[0008]
Furthermore, this object of the present invention is achieved by an opening trim or an opening weather strip, wherein the outer layer portion has a thickness of 0.3 mm to 1.2 mm.
[0009]
[Action]
The opening trim or opening weatherstrip of the present invention comprises at least a part of the outer layer; (a) at least two polymer blocks (A) mainly made of vinyl aromatic compounds and at least one made mainly of conjugated diene compounds. 100 parts by weight of a block copolymer comprising one polymer block (B) and / or a block copolymer obtained by hydrogenation of the block copolymer, (b) 40 to 200 weights of a non-aromatic rubber softener Part, (c) 5 to 300 parts by weight of a copolymer mainly composed of polyethylene or ethylene polymerized by a single site catalyst, (d) 5 to 200 parts by weight of a copolymer mainly composed of polypropylene or propylene, (I) The total amount of components (a), (b) and (d) and a part of component (c) are previously melted and kneaded, and thereafter or simultaneously, a hydroxyl group, a carboxyl group or an amine 5 to 100 parts by weight of component (e) composed of a modified polyolefin resin modified with a group capable of reacting with a group or a copolymer mainly composed of modified olefin, and thereafter or simultaneously with component (g) organic peroxide A styrene-based thermoplastic elastomer composition having a hardness of 55 to 90, which is produced by melt-kneading, and then (II) the obtained melt-kneaded product and the remainder of component (c) by melt-kneading. In a certain opening trim or opening weather strip, when the total amount of components (a), (b) and (d) and a part of component (c) are melt-kneaded in advance, (e) hydroxyl group, carboxyl group or amino group Since the addition of 5 to 100 parts by weight of a copolymer mainly composed of a modified polyolefin resin or a modified olefin modified with a group capable of reacting with the polymer, good appearance and wear resistance are guaranteed. .
[0010]
Furthermore, in the opening trim or opening weatherstrip of the present invention, the at least trim housing part and gripping lip part of the opening trim or opening weatherstrip are made of the olefin-based thermoplastic elastomer composition having the hardness of 55 to 75. The casing can maintain a good insertion force against the body flange, while ensuring good wear resistance against clothes and luggage contact when the door is opened, and good mounting followability to the body flange around the door opening. The
[0011]
Furthermore, in the opening trim or opening weatherstrip of the present invention, the outer layer portion has a thickness of 0.3 mm to 1.2 mm, so that its good wear resistance and mounting followability are maintained over a long period of time. Is done.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of an opening trim or opening weather strip according to the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is a cross-sectional view showing the main part of the opening trim of the present invention.
The opening trim 10 based on the method of the present invention shown in FIG. 1 includes a trim housing part 11 having a substantially U-shaped cross section, and a plurality of projecting projections from the inner side surfaces of the trim housing parts 11 facing toward the center. The gripping lip portion 12 and the insert metal IM integrally formed with the trim housing portion 11 as the core material are substantially the same as those of the conventional opening trim 1 described above.
[0013]
Since the trim casing portion 11 and the grip lip portion 12 are made of a styrene thermoplastic elastomer composition having a hardness of 55 to 90, the grip lip portion 12 can maintain a good insertion force with respect to the body flange BF. The casing 11 is also guaranteed to have good wear resistance against contact of clothes and luggage accompanying the opening of the door and good mounting followability to the body flange BF around the door opening, and its outer appearance and low appearance. The weight can be reduced by the styrene-based thermoplastic elastomer composition having a specific gravity.
[0014]
The styrenic thermoplastic elastomer composition comprises at least two polymer blocks (A) mainly obtained from the vinyl aromatic compound and at least one polymer block (B) mainly obtained from the conjugated diene compound. And 100 parts by weight of the component (a) comprising the block copolymer obtained by hydrogenation of the block copolymer and the non-aromatic rubber softener. 40 to 200 parts by weight of the component (b), 5 to 300 parts by weight of the component (c) composed of the copolymer mainly composed of polyethylene or ethylene polymerized by the single site catalyst, 5 to 200 parts by weight of the component (d) composed of the copolymer mainly composed of polypropylene or propylene, and the hydroxyl group, carboxyl group or It is produced by melting and kneading 5 to 100 parts by weight of the component (e) composed of the modified polyolefin resin modified with a group capable of reacting with an amino group or the copolymer mainly composed of a modified olefin. .
[0015]
In particular, the styrenic thermoplastic elastomer composition is first composed of all the components (a), (b), (d), (e), (f) and (h), and the component (c). A part is melted and kneaded, and then the component (g) is melted and kneaded by side-feed melting and kneading, and then the remainder of the component (c) is side-feeded.
[0016]
FIG. 2 is a cross-sectional view showing the main part of another opening weather strip 10 according to the present invention. The opening weather strip 10 shown in FIG. 2 has a configuration substantially the same as the opening trim 10 shown in FIG. 1 except that a hollow seal portion 13 is provided on the outer peripheral surface of the trim housing portion 11. The sealing performance around the door opening is improved.
[0017]
FIG. 3 is a cross-sectional view showing the main part of another opening trim 10 according to the present invention. In the opening trim 10 shown in FIG. 3, an outer layer portion 14 made of a styrene thermoplastic elastomer composition having a hardness of 55 to 90 is formed on the outer peripheral surface of the trim casing portion 11 to a thickness of 0.3 mm to 1.2 mm. The trim housing 11 and the gripping lip 12 are substantially the same as the opening trim 10 shown in FIG. 1 except that the trim casing 11 and the grip lip 12 are made of an olefin thermoplastic elastomer composition having a hardness of 55 to 75. When the hardness of the olefinic thermoplastic elastomer composition is less than 55, the rigidity of the grip lip 12 is lowered, and the holding force with respect to the body flange BF is lowered. Further, when the hardness of the olefinic thermoplastic elastomer composition exceeds 75, the rigidity of the grip lip portion 12 increases, the insertion force to the body flange BF increases, and the flexibility decreases. The opening trim 10 shown in FIG. 3 can maintain a good insertion force with respect to the body flange BF, while also having good wear resistance against contact of clothes and luggage accompanying opening of the door and the body flange BF around the door opening. Good mounting followability is guaranteed, and furthermore, the good wear resistance and mounting followability are maintained over a long period of time. When the thickness of the outer layer portion 14 is less than 0.3 mm, the wear resistance decreases, and when the thickness of the outer layer portion 14 exceeds 1.2 mm, the material cost increases.
[0018]
According to another opening weather strip of the present invention, at least a part of the outer layer portion 14 of the opening weather strip 10 is mainly composed of at least two polymer blocks (A) obtained mainly from the vinyl aromatic compound. 100 parts by weight of the component (a) comprising the block copolymer obtained from at least one polymer block (B) obtained from a diene compound, and the non-aromatic rubber softener. 40 to 200 parts by weight of component (b), 5 to 300 parts by weight of component (c) comprising the copolymer mainly composed of polyethylene or ethylene polymerized by the single site catalyst, and polypropylene Alternatively, 5 to 200 parts by weight of the component (d) composed of the copolymer mainly composed of propylene, the hydroxyl group, and carbo Melting and kneading 5 to 100 parts by weight of the component (e) composed of the modified polyolefin resin modified with a group capable of reacting with a xyl group or an amino group or the copolymer mainly composed of a modified olefin. Generated.
[0019]
In particular, the olefinic thermoplastic elastomer composition is first prepared by adding all the components (a), (b), (d), (e), (f) and (h), and the component (c). A part is melted and kneaded, and then the component (g) is melted and kneaded by side-feed melting and continuing kneading, and then the rest of the component (c) is side-feeded and melted and kneaded. 0020]
FIG. 4 is a cross-sectional view showing the main part of still another opening weather strip 10 according to the present invention. The opening weather strip 10 shown in FIG. 4 has substantially the same configuration as the opening trim 10 shown in FIG. 3 except that a hollow seal portion 13 projects from the outer peripheral surface of the trim housing portion 11. The sealing performance around the door opening is improved.
[0021]
【The invention's effect】
The above described opening trim or opening weather strip of the present invention has the following new effects. That is, the opening trim or opening weatherstrip of the present invention is mainly made of at least a part of the outer layer; (a) at least two polymer blocks (A) mainly made of vinyl aromatic compound and conjugated diene compound. 100 parts by weight of a block copolymer comprising at least one polymer block (B) and / or a block copolymer obtained by hydrogenating the block copolymer, (b) a non-aromatic rubber softener 40 to 200 parts by weight, (c) 5 to 300 parts by weight of a copolymer based on polyethylene or ethylene, polymerized with a single site catalyst, (d) 5 to 200 parts by weight of a copolymer based on polypropylene or propylene (I) The total amount of components (a), (b) and (d) and a part of component (c) are previously melted and kneaded, and thereafter or simultaneously, hydroxyl groups and carboxyl groups 5 to 100 parts by weight of component (e) composed of a modified polyolefin resin modified with a group capable of reacting with an amino group or a copolymer mainly composed of modified olefin, and thereafter or simultaneously with component (g) organic peroxide Next, (II) a styrene-based thermoplastic elastomer composition having a hardness of 55 to 90, produced by melt-kneading the obtained melt-kneaded product and the remainder of component (c). In the automobile weather strip, the total amount of the components (a), (b) and (d) and a part of the component (c) are preliminarily melt-kneaded, and (e) a hydroxyl group, a carboxyl group or an amino group Since 5 to 100 parts by weight of a copolymer mainly composed of a modified polyolefin resin or a modified olefin modified with a group capable of reacting is also added, it becomes possible to guarantee good appearance and wear resistance. .
[0022]
Furthermore, in the opening trim or opening weatherstrip of the present invention, at least the trim housing part and the grip lip part of the opening trim or opening weatherstrip are made of the olefin-based thermoplastic elastomer composition having the hardness of 55 to 75. The drive unit can maintain a good insertion force with respect to the body body flange, while ensuring good wear resistance against contact of clothes when the door is opened and good mounting followability to the body flange around the door opening. It became possible to do.
[0023]
Furthermore, in the opening trim or opening weatherstrip of the present invention, the trim outer layer portion has a thickness of 0.3 mm to 1.2 mm. It became possible to maintain.
[0024]
Next, the effects of the present invention described above will be further clarified by examples and comparative examples of the present invention.
[Examples and Comparative Examples]
As the outer layer part of the opening trim, the total amount of each component (a), (b), (d) and (e) and a part of the component (c) according to the weight part shown in Table 1 (“+” symbol in the table) Are melted and kneaded at a kneading temperature of 180 to 240 ° C. with a rotational speed of 350 rpm by a twin-screw extruder, and then the total amount of each component (f), (g) and (h) is Next, the remaining part of the component (c) (parts by weight indicated after “+” in the table) is side-feeded to be melted and kneaded, and hydrogenated styrene thermoplastic elastomer The pellets of the composition and the olefinic thermoplastic elastomer composition were produced, and the wear amount, specific gravity, hardness, tensile strength and gloss were measured, and the measurement results are shown in Table 2.
Moreover, each component (a)-(h) was as follows.
[1] Hydrogenated styrenic thermoplastic elastomer composition;
Component (a): Hydrogenated block copolymer (Kuraray Co., Ltd .: Septon 4077)
Styrene content: 30% by weight
Isoprene content: 70% by weight
Number average molecular weight: 260.000
Weight average molecular weight: 320.000
Molecular weight distribution: 1.23 Hydrogenation rate: 90% or more Component (b); Rubber softener (Idemitsu Kosan Co., Ltd .: Diana Process Oil PW-90)
Weight average molecular weight: 539
Paraffinic carbon number: 71%
Naphthenic carbon number: 29%
Component (c): ethylene-octene copolymer (Dow Chemical Japan Co., Ltd .: Engage EG8150)
Density: 0.868 g / cm3
Melt index (190 ° C., load 2.16 kg) 0.5 g / 10 min component (d); propylene homopolymer (manufactured by Mitsui Petrochemical Co., Ltd .: PP CJ700)
Crystallinity: Tm 166 ° C., ΔHm 82 mJ / mg
Component (e): Maleic acid-modified ethylene polymer (Mitsui Chemicals, Inc .: Adma-XE 070)
Maleic acid modification: Less than 1% by weight Melt index (190 ° C., Load 2.16 kg) 3.0 g / 10 min Component (f); Silicone oil (manufactured by Toray Dow Corning Co., Ltd .: SH 2001000CS)
Weight average molecular weight: 17.000
Main component: Dimethylpolysiloxane Viscosity: 1000 cSt
Ingredient (g): Organic peroxide (Organic peroxide agent Akzo Co., Ltd .: Kayahexa AD)
Component (h): Cross-linking aid (manufactured by Shin-Nakamura Chemical Co., Ltd .: NK Ester 3G)
[0025]
[Table 1]

[0026]
[Table 2]

[0027]
As is apparent from Tables 1 and 2, when the component (e) is less than 5 parts by weight, the amount of wear increases and the wear resistance decreases. (See Comparative Example 2)
On the other hand, when the component (e) exceeds 100 parts by weight, it was confirmed that the glossiness is lowered, the appearance is deteriorated, and the material cost is increased. (See Comparative Example 3)
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a main part of an opening trim according to the present invention.
FIG. 2 is a cross-sectional view showing the main part of another opening weather strip according to the present invention.
FIG. 3 is a cross-sectional view showing the main part of another opening trim according to the present invention.
FIG. 4 is a cross-sectional view showing the main part of still another opening weather strip according to the present invention.
FIG. 5 is a side view showing the vicinity of a door of a passenger car.
FIG. 6 is a cross-sectional view showing a main part of a conventional opening trim.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Conventional opening trim 2 Trim housing part 3 Grasp lip part IM Insert metal BF Body flange 10 Opening trim or opening weather strip 11 Trim housing part 12 Grasping lip part 13 Hollow seal part 14 Outer layer part

Claims (3)

At least part of the outer layer;
(A) a block copolymer comprising at least two polymer blocks (A) mainly made of vinyl aromatic compounds and at least one polymer block (B) mainly made of conjugated diene compounds, and / or 100 parts by weight of a block copolymer obtained by hydrogenating
(B) 40 to 200 parts by weight of a non-aromatic rubber softener,
(C) 5 to 300 parts by weight of a copolymer mainly composed of polyethylene or ethylene polymerized by a single site catalyst,
(D) 5 to 200 parts by weight of a copolymer mainly composed of polypropylene or propylene,
(I) The total amount of components (a), (b) and (d) and a part of component (c) are previously melted and kneaded, and then or simultaneously modified with a group capable of reacting with a hydroxyl group, carboxyl group or amino group 5 to 100 parts by weight of the component (e) composed of a modified polyolefin resin or a copolymer mainly composed of a modified olefin,
Thereafter or simultaneously melt kneaded with component (g) organic peroxide, then
(II) Opening trim or opening weather which is a styrene-based thermoplastic elastomer composition having a hardness of 55 to 90, produced by a method of melt-kneading the obtained melt-kneaded product and the remainder of component (c) In the strip
When the total amount of components (a), (b) and (d) and a part of component (c) were previously melt-kneaded, (e) modified with a group capable of reacting with a hydroxyl group, carboxyl group or amino group An opening trim or an opening weather strip characterized by adding 5 to 100 parts by weight of a copolymer mainly composed of a modified polyolefin resin or a modified olefin. Opening trim or opening weatherstrip according to claim 1, characterized in that at least the trim housing part (11) and the gripping lip part (12) are made of an olefinic thermoplastic elastomer composition having a hardness of 55-75. Opening trim or opening weatherstrip according to claim 1 or 2, characterized in that the outer layer (14) has a thickness of 0.3 mm to 1.2 mm.

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