JP2002155188A - Automotive trim - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automotive trim which excels in the balance of rigidity and impact resistance, excels in mar resistance and, in addition, does not cause cracking on collision and, at the same time, meets the regulation of the HIC (d) value. SOLUTION: The automotive trim is composed of a propylene based resin composition comprising a propylene/ethylene block copolymer which contains an ethylene/propylene random copolymerization portion having a specific ethylene content and a specific weight average molecular weight and has a specific MFR and a specific gel number and, if necessary, comprising an ethylene/α- olefin copolymer rubber, polyethylene, talc, and additives, and has a rib height set at a value not higher than a specified value by setting the rib pitch at a value not higher than a specified value.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automobile trim having high rigidity, high impact resistance, and excellent scratch resistance, and more particularly, to the generation of cracks at the time of collision in order to protect an occupant from impact in a vehicle interior. No damage and no injury value (Head
Injury Criteria; hereinafter, HIC (d)
Abbreviated as value. The present invention relates to an automotive trim that satisfies the standard of (1).

[0002]

2. Description of the Related Art In recent years, for automotive parts such as bumpers, instrument panels, door trims and pillars, propylene resin materials are blended with inorganic fillers such as talc and / or elastomers due to their excellent balance of physical properties and moldability. Propylene-based resin compositions are widely used.

[0003] When high impact characteristics are required for automobile parts, an elastomer is generally blended with a propylene-based resin material. However, when the blending amount of the elastomer increases, there is a problem that the flexural modulus and the flexural strength decrease. Although fillers such as talc are added to improve these physical properties, the flexural modulus is improved, but the improvement in flexural strength is not so large. For this reason, the conventional propylene-based resin composition was not sufficient in balance between impact resistance and bending strength, even though the flexural modulus was high.

[0004] In addition, many interior parts for automobiles are directly touched by human hands, and the rigidity and firmness, which are the expressions of the texture at this time, depend on the bending strength. Therefore, a propylene-based resin composition having an excellent balance between impact resistance and bending strength has been desired.

[0005] On the other hand, from the viewpoint of protecting the occupant from the impact in the passenger compartment by the FMVSS201, trims for automobiles, especially interior pillars (front pillar, center pillar, rear pillar, etc.), interior headers (front header, rear header) and interior side wheels are provided. Rails and the like are required to conform to the standard in which cracks do not occur at the time of collision and the HIC (d) value is 1000 or less.

The HIC (d) value is, as described later, the product of the 2.5th power of the normalized value of the time integration of the synthetic head acceleration and the duration during a collision at a speed of 24 km / h. It is a numerical value defined, and it is said that when the value exceeds 1000, a linear fracture occurs in the skull, leading to brain shake.

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to provide an automobile trim which is excellent in balance between rigidity and impact resistance, and which is excellent in scratch resistance.
Another object of the present invention is to provide an automotive trim that satisfies the HIC (d) value standard.

[0008]

Means for Solving the Problems As a result of intensive studies, the present inventors have found that a specific propylene-based high-impact resin composition containing a large amount of a rubber component and having a high fluidity may be added to a specific polyethylene, By using a propylene-based resin composition blended with talc and / or an additive to form a molded body having a specific rib shape, the rigidity and impact resistance are excellently balanced, and further, the scratch resistance is excellent. It has been found that an automobile trim that does not crack at the time of collision and satisfies the standard of HIC (d) value can be obtained.
The present invention has been completed.

That is, according to the first aspect of the present invention,
Using a propylene-based resin composition obtained by blending the components (A), (B), (C) and (D) shown below and mixing and / or kneading and granulating, the molded bodies crossed each other. An automotive trim is provided in which the rib pitch in the direction in which the rib spacing is shorter is 14 mm or less and the rib height is 24 mm or less. (A) A resin composition comprising the following components (a) and (b): 100 to 65% by weight (a) 60 to 83% by weight of a crystalline propylene homopolymerized portion (A unit) and an ethylene content of 30 Propylene random copolymer part (B unit part) having a weight average molecular weight (Mw) of 230,000 to 600,000 is contained in an amount of 17 to 40% by weight. The number of gels having a gel size of 50 μm or more in a molded product having an overall melt flow rate (230 ° C., 2.16 kg load) of 20 to 150 g / 10 min and 25 cm ² (area) × 0.5 mm (thickness) 100 or less propylene / ethylene block copolymer: 100 parts by weight (b) 20 to 50% by weight of α-olefin having 3 to 8 carbon atoms, and melt flow (230 ° C., 2.16 kg load) ethylene · alpha-olefin copolymer is 0.3~100g / 10 min Rubber: 0-20 parts by weight (B) density 0.920 g / cm ³ or more, the melt flow Polyethylene having a rate (190 ° C., 2.16 kg load) of 1 to 100 g / 10 min: 0 to 20% by weight (C) Talc having an average particle size of 0.5 to 15 μm: 0 to 15% by weight (D) Additives: 0 to 10 parts by weight (provided that the total of components (A), (B) and (C) is 100 parts by weight)

According to a second aspect of the present invention, there is provided an automobile trim in which the molded body is an interior pillar.

According to a third aspect of the present invention, there is provided an automobile trim in which the molded body is an interior header.

Further, according to a fourth aspect of the present invention, there is provided an automobile trim in which the molded body is an interior side rail.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail. The propylene-based resin composition used in the present invention is obtained by blending component (A), component (B), component (C) and component (D), and mixing and / or kneading and granulating.

1. Component (A) Component (A) used in the present invention comprises component (a) and component (b).

(1) Component (a) The component (a) is a main component of the component (A), and comprises a crystalline propylene homopolymer portion (A unit portion) and an ethylene / propylene random copolymer portion (B unit portion; (A rubber component).

The ethylene content of the B unit is from 30 to 5
It is 2% by weight, preferably 32 to 50% by weight, more preferably 35 to 45% by weight. If the ethylene content is outside the above range, the impact strength will be poor.

Further, the weight average molecular weight (M
w) is 230,000 to 600,000, preferably 250,000 to 500,000, more preferably 3
00,000 to 400,000. If Mw is less than the above range, impact strength is poor. On the other hand, if Mw exceeds the above range, the molded appearance will be deteriorated.

The proportion of the A unit and the B unit in the propylene / ethylene block copolymer is such that the A unit is 60 to 83% by weight, preferably 65 to 80% by weight, and more preferably 70 to 77% by weight. And the B unit is 17
-40% by weight, preferably 20-35% by weight, more preferably 23-30% by weight. When the proportion of the A unit is less than the above range and the proportion of the B unit exceeds the above range, the bending strength is inferior. On the other hand, when the proportion of the B unit is less than the above range and the proportion of the A unit exceeds the above range, the impact strength is poor.

The melt flow rate of the propylene / ethylene block copolymer (component (a)) (hereinafter referred to as "MF
R ". 230 ° C, 2.16 kg load)
150 g / 10 min, preferably 20 to 110 g / 10
Min, more preferably 20 to 70 g / 10 min. M
When the FR is less than the above range, the molded appearance is inferior. On the other hand, MFR
Exceeds the above range, the impact strength is poor.

In addition, the propylene-ethyl component (a)
Ren block copolymer is 25cm ²(Area) x 0.5
Gel size of 50 μm or more in mm (thickness) molded product
Gel number is 100 or less, preferably 60 or less,
And preferably 40 or less. 100 gels
Exceeding the above results in poor molded appearance and impact strength.

The propylene / ethylene block copolymer having the specific properties is produced by slurry polymerization, gas phase polymerization or liquid phase bulk polymerization using a Ziegler-based or metallocene-based highly stereoregular catalyst. As the polymerization method, either batch polymerization or continuous polymerization can be adopted. In producing the propylene / ethylene block copolymer, first, a propylene homopolymerization is carried out to form a crystalline polypropylene homopolymer portion (A unit portion).
Is formed, and then a random copolymerization of ethylene and propylene (B
(Unit part) is preferable from the viewpoint of quality.

For example, a solid component formed by contacting magnesium tetrachloride and titanium tetrachloride and an organic acid halide is subjected to propylene homopolymerization using a catalyst obtained by combining an organic aluminum compound and an organic silicon compound, and then ethylene and propylene are mixed. Can be produced by random copolymerization of

The propylene / ethylene block copolymer is a terpolymer containing another unsaturated compound, for example, an α-olefin such as 1-butene, or a vinyl ester such as vinyl acetate, as long as the effects of the present invention are not impaired. It may be the above copolymer or a mixture thereof.
Also, this propylene / ethylene block copolymer is
It may be in the form of pellets or powder.

(2) Component (b) The component (b) of the present invention is an ethylene / α-olefin copolymer rubber containing an α-olefin having 3 to 8 carbon atoms. Examples of the α-olefin having 3 to 8 carbon atoms include propylene, 1-butene, 1-pentene, 1-hexene, 1-octene, 4-methylpentene-1 and the like.

The content of the α-olefin is 20 to 50% by weight, preferably 20 to 45% by weight, more preferably 2 to 50% by weight based on the total amount of the ethylene / α-olefin copolymer rubber.
0 to 40% by weight. If the α-olefin content is less than the above range, the impact strength will be insufficient. On the other hand, when the α-olefin content exceeds the above range, the rigidity is poor.

The ethylene / α-olefin copolymer rubber of the component (b) has an MFR (230 ° C., 2.16 k
g load) is 0.3 to 100 g / 10 min, preferably 0.1 to 100 g / 10 min.
7 to 70 g / 10 min, more preferably 1 to 30 g / 1
0 minutes. If the MFR is less than the above range, the moldability is poor.
On the other hand, if the MFR exceeds the above range, the impact strength and the surface hardness become insufficient.

(3) Mixing ratio of component (a) and component (b) The mixing ratio of component (b) in component (A) is as follows:
0 to 20 parts by weight with respect to 100 parts by weight. That is, component (b) may not be blended in component (A), but blending component (b) has the advantage of improving impact strength. On the other hand, when the ratio of the component (b) exceeds 20 parts by weight based on 100 parts by weight of the component (a),
Insufficient bending strength. A preferable mixing ratio of the component (b) is 2 to 9 parts by weight based on 100 parts by weight of the component (a).

(4) Method for Producing Component (A) Component (A) is obtained by mixing component (a) and component (b). The mixing method is not particularly limited, and the component (a) and the component (b) may be mixed in the above mixing ratio and mixed using a conventionally known mixer such as a Henschel mixer, a tumbler, and a ribbon blender.

As the above-mentioned component (A), it is preferable to carry out the above-mentioned mixing, further melt-knead, and optionally granulate and form a pellet. In this case, kneading and granulation are carried out using a conventional kneading machine such as a single-screw extruder or a twin-screw extruder, or an ordinary kneader such as a Banbury mixer, a roll mixer, a Brabender plastograph, or a kneader.
It can be performed at about 240 ° C. Among these, it is preferable to manufacture using an extruder, especially a twin-screw extruder.

2. Component (B) The component (B) of the present invention has a density of 0.920 g / cm ³ or more, preferably 0.930 g / cm ³ or more, and an MFR.
(190 ° C., 2.16 kg load) 1 to 100 g / 10
Min, preferably 1 to 50 g / 10 min. If the density is less than 0.920 g / cm ³ , the rigidity decreases. If the MFR is less than the above range, the moldability is poor,
On the other hand, if it exceeds the above range, the impact strength decreases.

The polyethylene of the component (B) includes low-density polyethylene, linear low-density polyethylene, medium-density polyethylene, and high-density polyethylene. Among them, high-density polyethylene is preferred.

3. Component (C) The component (C) of the present invention has an average particle size of 0.5 to 15 μm,
Preferably, it is talc of 2 to 10 μm.

In the present invention, the use of talc having an average particle size within the above range has advantages such as a reduction in expansion coefficient, a reduction in shrinkage, and a good low-gloss appearance. . The average particle size of talc can be measured by a particle size distribution meter of a laser diffraction scattering method (for example, LA manufactured by Horiba, Ltd.).
-920 type).

These talcs can be obtained, for example, by finely classifying a product obtained by mechanically pulverizing a product naturally produced, and the like. Moreover, what was once coarsely classified may be further classified.
As a method of mechanical pulverization, jaw crusher,
There is a method using a crusher such as a hammer crusher, a roll crusher, a screen mill, a jet crusher, a colloid mill, a roller mill, and a vibration mill. These pulverized talc may be wet- or dry-classified once or repeatedly using a cyclone, cyclone air separator, micro-separator, sharp-cut separator, etc., in order to adjust to the average particle size shown in the present invention. I do. In producing talc used in the present invention, it is preferable to carry out a classification operation with a sharp cut separator after pulverizing to a specific particle size in order to obtain talc having a specific average particle size.

The talc used in the present invention may be untreated or surface-treated in advance. Examples of the surface treatment include, specifically, chemical or physical treatment using a treating agent such as a silane coupling agent, a higher fatty acid, a fatty acid metal salt, an unsaturated organic acid, an organic titanate, a resin acid, or polyethylene glycol. Is mentioned. By using talc subjected to such a surface treatment, it is possible to obtain a propylene-based resin composition which gives a molded article having further excellent moldability, impact strength and the like.

4. Component (D) The component (D) of the present invention is an additive. The additives that can be used in the present invention are intended to impart lubrication, and include hydrocarbons, alcohols, higher fatty acids, ester condyles, polyhydric alcohol partial esters,
Examples thereof include fatty acid amides, higher fatty acid metal salts, natural waxes, polymers such as silicones and fluororesins, monoamides, bisamides, polyamides and derivatives thereof.

Of the above, fatty acid amides and derivatives thereof are preferred. Specifically, lauric amide, stearic amide, oleic amide, behenic amide,
Erucamide, hydroxystearic acid amide, N-
Examples include stearyl erucamide, ethylenebisstearic acid amide, ethylenebisoleic acid amide, hexamethylenebisstearic acid amide, and the like.

5. Additional component (optional component) In addition to the above components (A), (B), (C) and (D), the propylene-based resin composition used in the present invention further enhances the effects of the present invention. Other additional components (arbitrary components) can be added as long as they are not impaired.

Examples of such additional components include phenol-based and phosphorus-based antioxidants; hindered amine-based, benzophenone-based and benzotriazole-based weathering deterioration inhibitors; nucleating agents such as organic aluminum compounds and organic phosphorus compounds. Whiskers such as fibrous potassium titanate, fibrous magnesium oxysulfate, fibrous aluminum borate, and calcium carbonate; filler components such as carbon fibers and glass fibers; other ultraviolet absorbers, antistatic agents,
A dispersant, a neutralizing agent, a foaming agent, a copper damage inhibitor, a flame retardant, and the like can be appropriately used.

These additional components may be added in advance to each of the components (A), (B), (C) and (D). The components (B), (C) and (D) may be mixed and melt-kneaded to produce a propylene-based resin composition.

6. Mixing ratio of components (A) to (D) When the total of components (A) to (C) is 100% by weight, the mixing ratio of component (A) is 100 to 65% by weight, preferably 100. ~ 85% by weight. In addition, component (A)
When the total of the components (C) is 100% by weight, the blending ratio of the component (B) is 0 to 20% by weight, preferably 0 to 20% by weight.
10% by weight. That is, the component (B) is an optional component that can be used as needed, and may not be blended in the components (A) to (D), but is scratch-resistant by blending the component (B). Properties can be further improved. However, if more than 20% by weight is added to the components (A) to (C), the rigidity decreases.

Further, when the total of the components (A) to (C) is 100% by weight, the mixing ratio of the component (C) is 0%.
-15% by weight, preferably 0-5% by weight. That is, the component (C) is an optional component that may be used as needed, and may not be blended in the components (A) to (D). Are further reduced, the shrinkage is reduced, and a good low-gloss appearance is obtained. However, if the content exceeds 15% by weight in the components (A) to (C), the impact strength decreases.

Component (D) in components (A) to (D)
Is 0 to 10 parts by weight, preferably 0 to 5 parts by weight, based on 100 parts by weight of the total of the components (A) to (C). That is, the component (D) is an optional component that may be used as needed, and may not be contained in the components (A) to (D). Can be further improved. However,
10 per 100 parts by weight of the total of components (A) to (C)
If the amount exceeds the weight part, the rigidity decreases.

7. Method for Producing Propylene-Based Resin Composition The method for producing the propylene-based resin composition used in the present invention is not particularly limited, and the components (A), (B), (C) and components described above by a conventionally known method are used. It can be produced by blending (D) and additional components used as needed in the above blending ratio and mixing.
Mixing can be performed by a method using a general mixer such as a Henschel mixer, a tumbler, and a ribbon blender.

In the present invention, after mixing the above components, the mixture may be further melt-kneaded and granulated to form a pellet. The kneading and granulation is performed at a set temperature of about 180 to 240 ° C. using an ordinary extruder such as a single-screw extruder or a twin-screw extruder, a Banbury mixer, a roll mixer, a Brabender plastograph, or a kneader. Can be. Among these, it is preferable to manufacture using an extruder, especially a twin-screw extruder. At the time of this mixing / kneading / granulation, those obtained by previously blending the above components may be mixed / kneaded, or the components are divided and mixed / kneaded, that is, for example, first, the component (A) ) Is mixed / kneaded with a component (B), component (C), component (D) or an additional component used as required, and then the remaining components are mixed / kneaded / granulated. Such a method can also be adopted. Further, the above components (A), (B), (C),
The component (D) and the additional components can be directly introduced into a hobber or the like of an injection molding machine and subjected to molding.

8. Molding method The propylene resin composition used in the present invention is:
It can be subjected to various known molding methods. For example, various molded articles for automobiles can be obtained by molding by injection molding (including gas injection molding), injection compression molding (injection press), extrusion molding, or hollow molding. Of these, injection molding and injection compression molding are preferred.

The propylene resin composition used in the present invention is excellent in rigidity, impact resistance and scratch resistance, and has a high balance of physical properties and surface properties. And has sufficient performance for practical use.

9. Shape of Automotive Trim The automotive trim of the present invention was formed using the above propylene-based resin composition so that the rib pitch in at least one direction of the molded body was 14 mm or less, and the rib height was 24 mm or less. Things. Rib height is 24mm
The following is essential, but preferably 15 to 23
mm, more preferably 18 to 20 mm. That is, when the rib height exceeds 24 mm, the height of the molded body increases, and the indoor space becomes narrow. Further, it is essential that the rib pitch in at least one direction is 14 mm or less,
Preferably 10 to 14 mm, more preferably 10 to 1
2 mm. The rib pitch in at least one direction is 14m
m, the rigidity becomes insufficient and the HIC (d)
The value exceeds 1000.

The automotive trim of the present invention has a bending property, an impact strength and a scratch resistance by using the propylene resin composition as described above and by forming a molded article having a specific shape as described above. Both are excellent, have a high balance of physical properties and surface properties, and can be used as a thin and lightweight automotive trim.

10. Occupant Protection Against Car Cabin Impact Further, the automotive trim of the present invention is FMVSS201.
(Protection of the occupant against impact in the passenger compartment) The vehicle does not crack at the time of collision and conforms to the standard that the HIC (d) value is 1000 or less.

The HIC (d) value is a numerical value represented by the following formula at the time of collision at a speed of 24 km / h. If the value exceeds 1000, a linear fracture occurs in the skull, and brain shake occurs. It is said to lead to.

HIC (d) = 0.75466 (HIC)
+166.4

[0053]

(Equation 1)

The FMVSS 201 has been applied in Japan and Europe since 2003, and vehicles that do not meet the standards are subject to punishment. Automotive trims to which the standard is applied include interior pillars (front pillar, center pillar, rear pillar, etc.), interior headers (front header, rear header), interior side rails, and the like.

[0055]

EXAMPLES Hereinafter, the present invention will be described in detail with reference to examples, but the present invention is not limited by these examples unless departing from the gist thereof. The measurement and evaluation of various physical properties in the examples were carried out in the following manner.

(1) MFR: Based on JIS-K7210, polypropylene resin and ethylene copolymer rubber are:
230 ° C, 2.16 kg load, 1 for polyethylene resin
It was measured at 90 ° C. under a load of 2.16 kg.

(2) B unit content: The content of the ethylene / propylene random copolymer portion (B unit) in the propylene / ethylene block copolymer (component (a)) is 2
g sample was immersed in 300 g of boiling xylene for 20 minutes to dissolve, then cooled to room temperature, and the precipitated solid phase was filtered through a glass filter and dried to obtain the solid phase weight. . The ethylene content in the B unit was measured by an infrared spectrum analysis method.

(3) Weight average molecular weight (Mw): GPC
(Gel permeation chromatography).

(4) Number of gels: 25 cm ² (area) × 0.
The number of gels having a gel size of 50 μm or more in a molded product of 5 mm (thickness) was determined by the following method. That is, a test piece having the above dimensions was prepared by injection molding, light was projected from the opposite side of the test piece, an enlarged photograph was taken with a stereoscopic microscope, and the photograph was separated and integrated into an image processing device having an average diameter of 50 μm or more. The number of gels was determined by the method.

(5) Flexural properties: Flexural modulus and flexural strength were measured at 23 ° C. in accordance with JIS-K7171.

(6) Izod impact strength: JIS-K7
Measured at 23 ° C. according to H.110.

(7) Scratch resistance: A 400 g load was applied to the surface of the leather grain plate with a scratching needle having a tip R of 0.6 mm.
It was scratched at a speed of 8.2 mm / s, the state of the scratch was observed, and the scratch resistance was evaluated according to the following criteria. ◎: Scratch is slightly observed but not noticeable. ：: Scratches are observed, but hardly noticeable. X: The scratch is conspicuous.

(8) Appearance: trim body thickness 2.5 mm,
A pillar trim having the specifications shown in Table 2 having a rib pitch of 20 mm, a rib root thickness of 1.2 mm, and a rib side surface inclination of 0.5 ° in the direction in which the rib interval is long was formed, and the presence or absence of a flow mark on the surface was evaluated. ：: Flow mark is inconspicuous. X: The flow mark is conspicuous.

(9) Collision test: The dummy head (built-in acceleration sensor) was free-flighted at a speed of 24 km / h, and the pillar trim was impacted.

Examples 1 to 6 and Comparative Examples 1 to 5 (1) Preparation of propylene-based resin composition Component (A) (component (a) + component (b)) shown in Table 1
The components (B), (C) and (D) were blended in the proportions shown in Table 1 and mixed with a Henschel mixer for 2 minutes, followed by a twin-screw kneader (Kobe Steel, Ltd., trade name: KCM5)
In 0), the mixture was kneaded and granulated at a set temperature of 200 ° C. to produce propylene-based resin composition pellets.

However, as the component (b), an ethylene / 1-butene copolymer rubber containing 1% of butene at 32% by weight and having an MFR of 8 g / 10 min was used in the proportion shown in Table 1.

[0067]

[Table 1] (2) Molding of test pieces The pellets obtained above were injection-molded with an injection molding machine (clamping pressure: 170 tons, molding temperature: 210 ° C.) to form test pieces. About the obtained test piece,
The bending characteristics and the Izod impact strength were measured, and the damage resistance was evaluated. Table 2 shows the results.

(3) Collision test Crack presence / absence: In the impact test of the trim for appearance evaluation, the trim body which did not crack was evaluated as ○, and the fracture body was evaluated as ×. Table 2 shows the results. HIC (d) value: The value calculated based on the above test is 1
000 or less was evaluated as ○, and 1,000 or more was evaluated as x. Table 2 shows the results.

[0069]

[Table 2]

[0070]

According to the present invention, not only is the balance of rigidity and impact resistance excellent, furthermore excellent scratch resistance, no cracking at the time of collision and satisfying the standard of HIC (d) value. An automotive trim is obtained. Among the trims for automobiles, they are most suitable for use as interior pillars, interior headers and interior side rails.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) C08K 5/00 C08K 5/00 // (C08L 53/00 (C08L 53/00 23:08) 23:08 F term (reference) 3D023 BA01 BA07 BB08 BB09 BB22 BB25 BC01 BD03 BD08 BD29 BE04 BE09 BE31 4J002 BB033 BB052 BB053 BB152 BP021 DJ046 FD016 GN00

Claims (4)

[Claims] 1. A propylene-based resin composition obtained by blending the following components (A), (B), (C) and (D), and mixing and / or kneading and granulating:
An automotive trim formed by setting the rib pitch in the direction in which the distance between the crossing ribs of the molded body is short to 14 mm or less and setting the rib height to 24 mm or less. (A) A resin composition comprising the following components (a) and (b): 100 to 65% by weight (a) 60 to 83% by weight of a crystalline propylene homopolymerized portion (A unit) and an ethylene content of 30 Propylene random copolymer part (B unit part) having a weight average molecular weight (Mw) of 230,000 to 600,000 is contained in an amount of 17 to 40% by weight. The number of gels having a gel size of 50 μm or more in a molded product having an overall melt flow rate (230 ° C., 2.16 kg load) of 20 to 150 g / 10 min and 25 cm ² (area) × 0.5 mm (thickness) 100 or less propylene / ethylene block copolymer: 100 parts by weight (b) 20 to 50% by weight of α-olefin having 3 to 8 carbon atoms, and melt flow (230 ° C., 2.16 kg load) ethylene · alpha-olefin copolymer is 0.3~100g / 10 min Rubber: 0-20 parts by weight (B) density 0.920 g / cm ³ or more, the melt flow Polyethylene having a rate (190 ° C., 2.16 kg load) of 1 to 100 g / 10 min: 0 to 20% by weight (C) Talc having an average particle size of 0.5 to 15 μm: 0 to 15% by weight (D) Additives: 0 to 10 parts by weight (provided that the total of components (A), (B) and (C) is 100 parts by weight) 2. The automotive trim according to claim 1, wherein the molded body is an interior pillar. 3. The automotive trim according to claim 1, wherein the molded body is an interior header. 4. The automotive trim according to claim 1, wherein the molded body is an interior side rail.