JP5271692B2 - Extruded product with core material - Google Patents

Description

  The present invention relates to an extrusion-molded article having a core material such as a weather strip and a trim that is attached to a flange at the opening peripheral edge of various vehicle bodies such as automobile doors, trunks, and back doors.

  An extruded product having a core material such as a weather strip and a trim to be mounted on a flange at the periphery of the opening of various vehicle bodies such as automobile doors, trunks, and back doors has a core material having a substantially U-shaped cross section in the longitudinal direction and the core material. A coating layer having a hollow seal portion is integrally formed on the outer side, and a pressure contact portion made of sponge rubber is integrally formed on the inner side of the connection portion having a substantially U-shaped cross section of the core material, and the pressure contact portion is formed at the end of the flange. It is attached by elastic pressure contact to the part to improve the sealing performance to prevent water intrusion and noise during traveling, etc., but sponge rubber does not stick to the flange and can not be completely sealed, Since the restoring force of the pressure contact portion is large, a gap is generated between the pressure contact portion and the flange. In addition, since complete sealing is not possible, there is a problem that rust occurs at the flange tip.

The present inventor has been made to solve the above problems, extrusion molded article having a core material to form a hollow seal portion and the coating layer on the outer side of the substantially U-shaped cross section of the core material and the core material An extruded product in which a pressure-bonding portion having a tackiness made of a thermoplastic elastomer composition is integrally formed inside a connection portion having a substantially U-shaped cross section of the core material, the pressure-contacting portion being soft and sticky By forming it with the thermoplastic elastomer composition it has, the flange can stick to the pressure-contact part and seal it, it is soft and has low resilience, it can be easily pressed and pressed, and it can bite in, preventing water intrusion It solves problems such as preventing the occurrence of rust at the front end of the flange by improving the sealing property to prevent intrusion such as noise during driving and complete sealing.

  In an extruded product (1) having a core material, a core material (3) having a substantially U-shaped cross section in the longitudinal direction and a hollow seal portion (2) made of a thermoplastic elastomer or rubber outside the core material (3) And a coating layer (8) are formed, and a pressure-bonding portion (4) having adhesiveness made of a thermoplastic elastomer composition is integrally formed inside the connecting portion (6) having a substantially U-shaped cross section of the core material (3). Is formed.

  Further, the pressure contact portion (4) uses a thermoplastic elastomer composition having a hardness HDA (JIS K6253, value after 15 seconds) of 25 or less.

And the thermoplastic elastomer composition of this press-contact part (4) of this invention is,
(A) a block copolymer comprising at least two polymer blocks A mainly made from an aromatic vinyl compound and at least one polymer block B mainly made from a conjugated diene compound and / or hydrogenating the block copolymer. 100 parts by weight of the obtained hydrogenated block copolymer. (Provided that the polymer block B contains a polyisoprene block, and isoprene is a block copolymer in which 20 to 80% by weight has 1,4-bonds, and 80 to 20% by weight has 3,4-bonds, Or a hydrogenated block copolymer in which at least 80% of the aliphatic double bonds derived from isoprene of the block copolymer are hydrogenated.)
(B) a block copolymer comprising at least two polymer blocks A mainly made from an aromatic vinyl compound and at least one polymer block B mainly made from a conjugated diene compound and / or hydrogenating the block copolymer. Hydrogenated block copolymer obtained by (However, the polymer block B contains a polyisoprene block, and isoprene is a block copolymer in which 70 to 100% by weight has 1,4-bonds, or at least 90 aliphatic double bonds derived from isoprene. % Hydrogenated block copolymer hydrogenated.) 45-660 parts by weight.
(C) 10 to 35 parts by weight of a crystalline olefin resin having a flexural modulus of 50 to 1000 MPa. (D) 220 to 450 parts by weight of a non-aromatic rubber softener.
(E) 10 to 180 parts by weight of hydrogenated petroleum resin.
Is a thermoplastic elastomer composition.

  Moreover, a press-contact part (4) forms in the inner side of the connection part (6) of a cross-sectional substantially U shape of this core material (3), and the opposing side part (7) (7).

  Further, a hollow portion (5) is formed in the pressure contact portion (4), and the pressure contact portion (4) formed with the hollow portion (5) is integrally formed by extending inside the core material (3). Is.

  And a groove part (10) is formed in this press-contact part (4).

  In addition, a large number of protrusions (14) (14) are formed in the pressure contact part (4).

  Further, the thermoplastic elastomer or rubber forming the hollow seal portion (2) is made of a foam.

  Furthermore, the core material (3) is made of a hard synthetic resin.

  The core material (3) is made of metal.

  Since the present invention is configured as described above, the inner side of the connecting portion of the core material having a substantially U-shaped cross section, like an extruded product having a core material attached to the periphery of the opening of this type of conventional automobile. The pressure contact part made of sponge rubber is integrally molded, and the pressure contact part is elastically pressed and attached to the end of the flange to prevent water intrusion and noise during running and improve the sealing performance. Sponge rubber does not adhere to the flange contact surface, and because of its high resilience, it cannot be sealed completely, resulting in a large restoring force of the press contact part and a gap between the press contact part and the flange. End up. Furthermore, in order to solve the problem that rust is generated at the flange end due to incomplete sealing, the present invention includes a hollow seal portion made of a thermoplastic elastomer or rubber and a coating layer on the outer side of the core material. And the pressure-bonding part having adhesiveness made of a thermoplastic elastomer composition is integrally extruded inside the connection part having a substantially U-shaped cross section of the core material, so that the flange adheres to the pressure-contacting part. It has an effect of preventing water intrusion and preventing intrusion such as noise during traveling, and an effect of preventing generation of rust at the flange tip.

  Furthermore, by using a thermoplastic elastomer composition having a hardness of HDA (value after 15 seconds of JIS K6253) of 25 or less as the physical property of the material forming the press-contact portion, the material of the press-contact portion becomes softer, so that the flange It can be easily pressed and pressed into the pressure contact portion to bite, and has an effect of improving the sealing performance.

  And, since the press contact part is integrally formed on the inside of the connecting part and both sides of the substantially U-shaped cross section of the core material, even if the position of the flange is shifted to the left and right of the side part of the core material, the press contact part is Since both sides of the material are formed, there is an effect of stably sealing.

  Further, by forming the hollow portion inside the press contact portion, there is an effect that the restoring force of the press contact portion is reduced and the adhesiveness between the flange and the press contact portion is increased. Furthermore, by forming the press contact portion to extend inside the core material, the area where the press contact portion contacts the core material increases, so that it can be integrally molded firmly.

  And by forming a groove part in the surface of a press-contact part, a flange becomes easy to bite into a groove part, and there exists an effect which improves adhesiveness and a sealing performance.

In addition, by forming a large number of protrusions in the pressure contact portion, there is an effect that the restoring force of the protrusions is weakened and the adhesiveness to the flange is increased.
Furthermore, the thermoplastic elastomer or rubber forming the hollow seal portion is made of a foamed material, so that there is an effect of reducing the weight of the extruded product.

Furthermore, the core material is made of a hard synthetic resin, so that there is an effect of reducing the weight of the extruded product. Moreover, there is also an effect that the linear expansion coefficient is reduced by making the core material a metal.
And a core material and a coating layer can be integrally formed firmly by forming a coating layer inside a core material.

  Referring to the drawings as an embodiment of the present invention, what is shown in FIG. 1 is a request for an extruded product (1) having a core member attached to a flange at the periphery of a vehicle body opening such as an automobile door, trunk, back door or the like. The cross-sectional view described in the item 1 is shown, in which a core (3) having a substantially U-shaped cross section in the longitudinal direction and a hollow seal portion (2) made of a thermoplastic elastomer or rubber outside the core (3). ) And a coating layer (8), and the core (3) has a substantially U-shaped cross section to form a connecting portion (6) and side portions (7) and (7). The connecting portion (6) The press contact part (4) which consists of a soft thermoplastic elastomer composition which forms a hollow part (5) inside is formed. The shape of the pressure contact portion (4) is formed by various shapes such as a semicircular shape, a rectangular shape, a semi-elliptical shape, and a wave shape as necessary, and the shape of the hollow seal portion (2) is a square shape as necessary. It is formed by various shapes such as circular, elliptical and the like. A space portion (18) is formed between the side portions (7) and (7) and the pressure contact portion (4).

  Further, the pressure contact portion (4) uses a thermoplastic elastomer composition having a hardness HDA (value after 15 seconds of JIS K6253) of 25 or less.

The components of the thermoplastic elastomer composition forming the pressure contact portion (4) are:
Component (a): a block copolymer comprising at least two polymer blocks A mainly made from aromatic vinyl compounds and at least one polymer block B mainly made from conjugated diene compounds and / or hydrogen 100 parts by weight of a hydrogenated block copolymer obtained by addition. (Provided that the polymer block B contains a polyisoprene block, and isoprene is a block copolymer in which 20 to 80% by weight has 1,4-bonds, and 80 to 20% by weight has 3,4-bonds, Or a hydrogenated block copolymer in which at least 80% of the aliphatic double bonds derived from isoprene of the block copolymer are hydrogenated.)
Component (b): a block copolymer comprising at least two polymer blocks A mainly made from aromatic vinyl compounds and at least one polymer block B mainly made from conjugated diene compounds and / or hydrogen Hydrogenated block copolymer obtained by addition. (However, the polymer block B contains a polyisoprene block, and isoprene is a block copolymer in which 70 to 100% by weight has 1,4-bonds, or at least 90 aliphatic double bonds derived from isoprene. % Hydrogenated block copolymer hydrogenated.) 45-660 parts by weight.
Component (c): 10 to 35 parts by weight of a crystalline olefin resin having a flexural modulus of 50 to 1000 MPa, preferably 50 to 700 MPa.
Component (d): 220 to 450 parts by weight of a non-aromatic rubber softener.
Component (e): 10 to 180 parts by weight of hydrogenated petroleum resin.
Is a thermoplastic elastomer composition.

FIG. 2 shows a third aspect of the present invention, wherein the pressure contact portion (4) is formed by the connecting portion (6) of the core material (3) having a substantially U-shaped cross section and the opposite side portions (7) (7). It is formed inside.

FIG. 3 shows a fourth aspect, in which a hollow portion (5) is formed inside the pressure contact portion (4) formed inside the connecting portion (6).
And the thing of FIG. 4 is sectional drawing which showed the state which the press-contact part (4) of the extrusion molded product (1) pressed against the flange edge part (13) of the front-end | tip of the flange (12) of a vehicle body panel (11). is there.

FIG. 5 shows a fifth aspect of the present invention, in which the press contact portion (4) in which the hollow portion (5) is formed extends integrally with the core member (3).

6 shows a sixth aspect of the present invention, in which the groove (10) is formed in the pressure contact portion (4), and the one shown in FIG. 7 covers the entire inside of the core (3) of the eleventh aspect. The layer (8) is shown, and the pressure contact portion (4) is extended and integrally formed inside the core member (3) so as to wrap around the hollow portion (5). And the thing of FIG. 8 shows the cross section where the thickness of the press-contact part (4) which forms a hollow part (5) is not constant thickness, and a coating layer (8) does not heat-seal partially, but non-heat-seal | fusion Part (17) is formed. The hollow seal portion (2) is formed in a circular shape.

FIG. 9 shows a seventh aspect of the present invention, in which a large number of protrusions (14) and (14) are formed in a sawtooth shape on the pressure contact portion (4). In addition, as shown in FIG. 10, a large number of protrusions (14) (14) may be formed in irregular shapes.
And what is shown in FIG. 11 shows the core material (3) of a cross-sectional substantially U shape, and the side part (7) (7) and the connection part (6) of the cut part (16) (16) which oppose each other. In the portion shown in FIG. 12, the cut portions (16) and (16) are alternately formed in the side portions (7) and (7) and a part of the connecting portion (6).

What is shown in FIG. 13 shows an embodiment of a manufacturing method using a core material (3) made of a hard synthetic resin, a hollow seal portion (2) made of a thermoplastic elastomer, a coating layer (8), and a pressure contact portion (4). As shown in FIGS. 11 and 12, the core material (3) in which the cut portions (16) and (16) having various shapes are formed enters the second die die (29) and is second extruded. A molten thermoplastic elastomer forming the coating layer (8) injected into the molding machine (26) and a molten thermoplastic elastomer forming the hollow seal portion (2) injected into the third extrusion molding machine (27) And the molten thermoplastic elastomer composition forming the pressure-bonding part (4) having an adhesive property injected into the fourth extrusion molding machine (28) inside the second mold die (29), the core material ( 3) heat-sealed around the periphery and inside the connecting part (6) 2 through cooling tank (31). Reference numeral (30) denotes an injection tube.
Moreover, in the manufacturing method by which the hollow seal part (2) and the coating layer (8) are made of rubber, a vulcanized layer is added after the second mold die (29).

FIG. 14 shows a manufacturing method in which a core material (3) made of a hard synthetic resin and a hollow seal portion (2) made of a thermoplastic elastomer, and an extrusion molding of a coating layer (8) and a pressure contact portion (4) are continuously performed. The hard synthetic resin is injected into the first extrusion molding machine (21), and the core material (3) having a substantially U-shaped cross section is formed by the first mold die (22). After passing through the first cooling water tank (23), after passing through the take-up roller (24), the side part (7) (7) or side part (7) of the core material (3) having a substantially U-shaped cross section by the excision machine (25) ) (7) and part of the connecting part (6), as shown in FIG. 11 and FIG. 12, the core member (3) is cut into various shapes of cut parts (16) and (16) in a desired shape.
Thereafter, the molten thermoplastic elastomer that enters the inside of the second mold die (29) and forms the coating layer (8) injected into the second extrusion molding machine (26) and the third extrusion molding machine (27). The molten thermoplastic elastomer forming the hollow seal portion (2) injected into the melt and the molten thermoplastic elastomer composition forming the pressure contact portion (4) having adhesiveness injected into the fourth extrusion molding machine (28) An object is heat-sealed inside the second mold die (29) and around the core (3) and inside the connecting portion (6), and then passes through the second cooling tank (31). The core material (3) and the coating layer (8) are heat-sealed. However, as shown in FIG. 8, there is a case where only the non-heat-sealed portion (17) is formed without being partially heat-sealed.

  Furthermore, what is shown in FIG. 15 shows a cross section of an extrusion-molded article having a core material that has been practiced in the past, and a sponge rubber pressure contact portion (4) inside the connecting portion (6) of the core material (3). Is formed. FIG. 16 shows an end of the flange because the extruded product (1) having the core shown in FIG. 15 is mounted on the flange (12), the pressure contact portion (4) is not sticky, and the restoring force is large. This shows a state in which a gap (15) is generated between (13) and the pressure contact part (4). Moreover, FIG. 17 shows the outline of the cross section of the test method of the water leak test using the extruded product (1) of the present invention, and the extruded product (1) is assembled in a metal laboratory water tank (33). Then, the pressure contact part (4) is pressed, and the cross section in which the water (32) is filled up to the inside of the experimental water tank (33) and the middle of the height of the hollow seal part (2) is shown. The code | symbol (34) shows the water tank exterior.

In addition, as an example of use of the material used in the present invention, the core material (3) having a substantially U-shaped cross section has a hardness HDA (value after 15 seconds of JIS K6253) of 85 or more as an example of use of a hard synthetic resin material. An olefin resin or a mixed synthetic resin in which 20 to 50% by weight of a powder such as talc is mixed with an olefin resin is used to increase rigidity and reduce a linear expansion coefficient. For example, the linear expansion coefficient of a synthetic resin core material of 100% by weight of polypropylene resin is 1.4 × 10 ⁻⁴ , and the linear expansion is achieved by a mixed synthetic resin in which 60% by weight of polypropylene resin and 40% by weight of talc powder are mixed. The coefficient may be used as small as 0.33 × 10 ⁻⁴ .
Further, examples of the core material (3) in which metal is used include iron, aluminum, and stainless steel. For example, in iron, the linear expansion coefficient is reduced to 0.1 × 10 ⁻⁴ , and an extruded product ( The influence of expansion and contraction due to heat in 1) is further reduced.

  Further, examples of the use of the thermoplastic elastomer material for forming the coating layer (8) or the hollow seal portion (2) include olefin-based thermoplastic elastomers or foams thereof, styrene-based thermoplastic elastomers or foams thereof. Is done. As a use example of the rubber material forming the covering layer (8) or the hollow seal portion (2), rubber such as ethylene / propylene rubber (EPDM) or its foam is used. In addition, as an example of usage depending on the hardness of the coating layer (8) and the hollow seal portion (2), for example, as a thermoplastic elastomer or rubber forming the coating layer (8), the hardness HDA (JIS K6253, 15 seconds later value) 40-80 are used, and the thermoplastic elastomer or rubber forming the hollow seal portion (2) has a hardness of HDA (JIS K6253, 15 seconds later value) 20-40 It is.

  Further, the press contact portion (4) is formed of a soft thermoplastic elastomer composition having a hardness of HDA (value after 15 seconds of JIS K6253) of 25 or less, preferably so that the press contact portion (4) can be easily pressed and pressed. HDA (JIS K6253 15 seconds later value) is formed by 1-20. Further, as other physical properties of the pressure contact portion (4), the tensile stress at 100% elongation (JIS K6251) corresponds to 0.05 to 0.5 Mpa, or the rebound elasticity (JIS K6255) corresponds to 30% to 70%. It is preferred to use a soft thermoplastic elastomer composition or a foam thereof.

  Although the Example and comparative example of a thermoplastic elastomer composition which form the press-contact part (4) of this invention below are demonstrated, this invention is not limited to this. The materials and test methods used in the examples and comparative examples are as follows.

Material component (a):
Hydrogenated SIS: Hibler 7125 (Kuraray Co., Ltd.)
Styrene content: 20% by weight, isoprene content: 80%
Hydrogenation rate 90%
3,4-bond: about 60%
1,4-bond: about 40%
Component (b):
SEEPS: Septon 4077 (manufactured by Kuraray Co., Ltd.)
Styrene content: 30% by weight, isoprene content: 70%
Hydrogenation rate 90% or more Number average molecular weight 260,000
Weight average molecular weight 320,000
Component (c):
PP: Example FX4E (manufactured by Nippon Polypro Co., Ltd.)
Polypropylene, MFR 5.3 g / 10 min, flexural modulus 650 MPa
Comparative Example EA9 (Nippon Polypro Co., Ltd.)
Polypropylene, MFR 0.5g / 10min, flexural modulus 1800MPa
Component (d):
Paraffin oil: PW-90 (manufactured by Idemitsu Kosan Co., Ltd.), n-paraffin oil, weight average molecular weight 540, dynamic viscosity at 40 ° C. 95.54 cSt,
Dynamic viscosity at 100 ° C 11.25 cSt, pour point -15 ° C, flash point (COC) 270 ° C
Ingredient (e):
Hydrogenated petroleum resin: Imarp P140 (made by Idemitsu Petrochemical Co., Ltd.)
C5-Aromatic Copolymerized Hydrogenated Resin In the above examples, each component was melted and kneaded together. The melt kneading conditions were as follows. A twin screw extruder (L / D = 47) was used, kneading temperature 160 ° C. to 240 ° C. and screw rotation speed 100 rpm. The obtained resin composition was tested as described above, and the results are shown in Table 1.
Comparative Example 10
TPS: Styrenic resin Reostomer LJ-1040N manufactured by Riken Technos Co., Ltd.
Comparative Example 11
TPO: Olefin-based resin Multi-use rheomer LE-3140N manufactured by Riken Technos Co., Ltd.

Test Method (1) Hardness: Based on HDA (value after 15 seconds of JIS K6253), measurement was performed using a 6 mm thick press sheet for testing.
(2) Compression set (%): In accordance with JIS K6262, a cylindrical test piece having a diameter of 13 mm and a thickness of 6.3 mm obtained by press molding was used. The test conditions were a compression rate of 25% and 70 ° C. × 22 hours.
(3) Adhesive strength (N / 100 mm width): A 1 mm thick press sheet is set on a coated plate (plate thickness 3 mm × 100 mm length), and a load of 500 g is applied. It is measured with a tensile tester (tensile speed: 10 mm / min) after 23 ° C. × 24 hours.
(4) Water leakage test: As shown in FIG. 17, the extruded product (1) of the present invention was assembled in an experimental water tank (33) to fill water (32), and the water (32) was water tank after 23 ° C. × 48 hours. Leakage to the outside (34) was measured. In Comparative Examples 1, 2, 4, 5, and 7, the test is not possible due to the impossibility of extrusion molding, and is left blank.
○: No leakage ×: Leakage (5) Extrudability: As shown in FIG. 13, the extrusion moldability in the extrusion molding is confirmed and judged.
◎: Very good ○: Good ×: Bad

Examples 1-9 and Comparative Examples 1 to 10
Each component shown in Tables 1 to 4 was melted and kneaded at a time. The melt kneading conditions were as follows.
A twin screw extruder (L / D = 47) was used, kneading temperature 160 ° C. to 240 ° C. and screw rotation speed 100 rpm. The obtained resin composition was tested for (1) hardness (2) and compression set, and (3) adhesive strength, and the results are shown in Tables 1 to 4. Next, (4) water leakage test and (5) extrusion moldability confirmation were carried out by molding the resin composition by extrusion molding as shown in FIG. Table 4 shows.

As is clear from Tables 1 and 2, Examples 1 to 9 are thermoplastic elastomer compositions that form the press contact part (4) of the present invention as set forth in claim 1 . Excellent in water leak test.

On the other hand, Comparative Examples 1 to 6 in Table 3 and Comparative Examples 7 to 9 in Table 4 are thermoplastic elastomer compositions outside the component range in claim 1 . Either or both of the water leak test and the extrudability are problematic. Comparative Examples 3, 6, 8, and 9 have a problem in the water leakage test, and Comparative Examples 1, 2, 4, 5, and 7 have a problem in extrusion moldability, and an extruded product used for the water leakage test is obtained. Since there is no water leak test, it is left blank.

  Further, Comparative Example 10 and Comparative Example 11 in Table 4 use a thermoplastic elastomer composition having a hardness HDA (JIS K6253, value after 15 seconds) of 25 or less. There is no stickiness and water leak test is problematic.

It is a vertical side view of the extrusion molded product which has a core material of this invention. It is a vertical side view of the other Example of the extrusion molded product which has a core material of this invention. It is a vertical side view which similarly shows the other Example of the extrusion molded product of this invention. It is a vertical side view of the other Example of the extrusion molded product of this invention. It is a longitudinal side view of the other Example of the extrusion molded article of the present invention similarly. It is a vertical side view which shows the other Example of the extrusion molded product of this invention. It is a vertical side view which similarly shows the other Example of the extrusion molded product of this invention. It is a vertical side view which shows the other Example of the extrusion molded product of this invention. It is a vertical side view which similarly shows the other Example of the extrusion molded product of this invention. It is a vertical side view which shows the other Example of the extrusion molded product of this invention. It is the slope figure which a part of core material of the present invention was missing. It is a perspective view of the other Example which a part of core material of the present invention was omitted. It is a side view which shows a part of manufacturing process of this invention. It is a side view which similarly shows the whole manufacturing process of the extrusion molded product of this invention. It is a vertical side view which mounted the press-contact part to the conventional extrusion molded product. Similarly, it is a longitudinal side view showing a state where a flange is attached to a conventional extruded product and a gap is generated at the end of the flange. It is a vertical side view of the state which performed the water leak test using the extrusion molded product of this invention.

DESCRIPTION OF SYMBOLS 1 Extrusion molded product 2 Hollow seal part 3 Core material 4 Pressure contact part 5 Hollow part 6 Connection part 7 Side part 8 Cover layer 9 Holding piece 10 Groove part 11 Car body panel 12 Flange 13 Flange end part 14 Projection part 15 Clearance part 16 Cut part 17 Non-thermally fused portion 18 Space portion 21 First extrusion molding machine 22 First mold die 23 First cooling water tank 24 Take-off roller 25 Cutting machine 26 Second extrusion molding machine 27 Third extrusion molding machine 28 Fourth extrusion molding machine 29 Second die 30 Injection pipe 31 Second cooling water tank 32 Water 33 Laboratory water tank 34 Water tank outside

Claims (11)

In an extruded product (1) having a core material attached to a flange at the periphery of a vehicle body opening such as an automobile door, trunk, back door, etc., a core material (3) having a substantially U-shaped cross section in the longitudinal direction and the core material ( 3) A hollow seal portion (2) made of a thermoplastic elastomer or rubber and a coating layer (8) are formed on the outside of 3), and the inside of the connecting portion (6) having a substantially U-shaped cross section of the core material (3) An extruded product having a core material integrally formed with a pressure-bonding part (4) having adhesiveness made of a thermoplastic elastomer composition ,
The thermoplastic elastomer composition of the pressure contact portion (4) is:
(A) a block copolymer comprising at least two polymer blocks A mainly made from an aromatic vinyl compound and at least one polymer block B mainly made from a conjugated diene compound and / or hydrogenating the block copolymer. 100 parts by weight of the obtained hydrogenated block copolymer. (Provided that the polymer block B contains a polyisoprene block, and isoprene is a block copolymer in which 20 to 80% by weight has 1,4-bonds, and 80 to 20% by weight has 3,4-bonds, Or a hydrogenated block copolymer in which at least 80% of the aliphatic double bonds derived from isoprene of the block copolymer are hydrogenated.)
(B) a block copolymer comprising at least two polymer blocks A mainly made from an aromatic vinyl compound and at least one polymer block B mainly made from a conjugated diene compound and / or hydrogenating the block copolymer. Hydrogenated block copolymer obtained by (However, the polymer block B contains a polyisoprene block, and isoprene is a block copolymer in which 70 to 100% by weight has 1,4-bonds, or at least 90 aliphatic double bonds derived from isoprene. % Hydrogenated block copolymer hydrogenated.) 45-660 parts by weight.
(C) 10 to 35 parts by weight of a crystalline olefin resin having a flexural modulus of 50 to 1000 MPa.
(D) 220 to 450 parts by weight of a non-aromatic rubber softener.
(E) 10 to 180 parts by weight of hydrogenated petroleum resin.
Consist of
An extruded product having a core material characterized by the above.   2. The extruded product having a core material according to claim 1, wherein the pressure contact portion (4) is made of a thermoplastic elastomer having a hardness of HDA 25 or less. Contact portion (4) of the core material (3) of substantially U-shaped cross section of the connecting portion (6) and opposite sides (7) (7) according to claim 1 or claim which is characterized in that formed on the inside of the An extrusion-molded article having the core material according to Item 2 . The extrusion-molded article having a core material according to any one of claims 1 to 3, wherein a hollow portion (5) is formed in the press-contact portion (4). The core material according to claim 4 , wherein the press contact part (4) forming the hollow part (5) of claim 4 is integrally formed by extending inside the core material (3). Extruded product. The extruded part having the core material according to any one of claims 1 to 5 , wherein a groove (10) is formed in the pressure contact part (4). The extrusion-molded article having a core material according to any one of claims 1 to 3 , wherein a plurality of protrusions (14) (14) are formed in the pressure contact part (4). The extruded product having a core material according to any one of claims 1 to 7, wherein the thermoplastic elastomer or rubber forming the hollow seal portion (2) is made of a foamed product thereof. The extruded product having a core material according to any one of claims 1 to 8, wherein the core material (3) having a substantially U-shaped cross section is made of a hard synthetic resin. The extruded product having a core material according to any one of claims 1 to 8, wherein the core material (3) having a substantially U-shaped cross section is made of metal. The extrusion-molded article having a core material according to any one of claims 1 to 10 , wherein a coating layer (8) is formed on a part or the whole of the inner side of the core material (3).

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