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Foam rubber material for weather strip

A foam rubber, weather stripping technology, applied in the directions of adhesives, transportation and packaging, films/sheets without carriers, etc., can solve the problems of poor compression set, large compression set value, inability to have satisfactory watertight performance, etc. High water tightness, less restrictive effect

Active Publication Date: 2014-05-21
NISHIKAWA RUBBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the non-drying sealant has problems such as: (1) high manufacturing cost because expensive special equipment is required in the step of injecting the sealant into the mating portion of the product; (2) the injection amount thereof varies; (3) The sealant cannot be reassembled because it adheres to the body side once it is fitted to the body during assembly; (4) It has a large compression set value (ie, poor compression set)
However, such a sealing member may be "lifted" from the flange, which poses a problem of not being able to have a satisfactory watertight performance
Therefore, there is a problem that there is a limit to the cross-section of the applicable product and the shape of the sponge part

Method used

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  • Foam rubber material for weather strip
  • Foam rubber material for weather strip
  • Foam rubber material for weather strip

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 and comparative example 1

[0081] The blending ingredients (parts by mass) shown in Table 1 were kneaded to obtain a rubber composition, which was extruded into a sheet, vulcanized and foamed in a high-temperature atmosphere to produce a crosslinked rubber sponge material (foam rubber Material).

[0082] Table 1

[0083]

Example 1

Comparative example 1

(a) Olefin rubber

100

100

(b) Terpene resin

50

-

(d) carbon black

60

60

(e) Inorganic filler

10

10

(f) softener

90

90

(c) Blowing agent

15

15

(g) Cross-linking agent

1

1

(h) Vulcanization accelerator

8

8

Total (parts by mass)

334

284

[0084] In Table 1, component (a) is ethylene-α-olefin-based copolymer rubber, specifically EPDM, and component (b) is terpene resin (YS Resin TO-105 (manufactured by Yasuhara Chemical Co., Ltd.) , component (c) is ADCA (azodicarbonamide) and OBSH (oxybisbenzenesulf...

Embodiment 2 and comparative example 2

[0108] Each of the crosslinked rubber sponge materials of Example 1 and Comparative Example 1 was applied as a sealing member to a watertight portion of a weather strip, and its watertight performance was evaluated by the following watertight test. The crosslinked rubber sponge material of Example 1 was used in Example 2, and the crosslinked rubber sponge material of Comparative Example 1 was used in Comparative Example 2.

[0109]

[0110] figure 2 Shows the state of the watertight test in which the structure of the rear trunk or rear door of the vehicle is reproduced. The weather stripping 5 of the automobile is fitted in the trunk or around the opening of the rear door, the weather stripping 5 has a metal or plastic core material 5C, and is also composed of a gripping portion 5A fitted onto a flange 1 formed protrudingly from the main body. Constructed with a hollow-shaped sealing member 5B having an approximately circular cross-section with a hollow in the center, whic...

Embodiment 3～6 and comparative example 3

[0119] The blending ingredients (parts by mass) described in Table 8 were kneaded to obtain a rubber composition, which was extruded into a sheet, vulcanized and foamed in a high-temperature atmosphere to produce a crosslinked rubber sponge material.

[0120] The ingredients were the same as those shown in Table 1, except that the grade (product number) of the carbon black of ingredient (d) was different from Table 1 and ingredient (c) was OBSH alone. Therefore, the terpene-based resin was YS Resin TO-105 (manufactured by Yasuhara Chemical Co., Ltd.).

[0121] Table 8

[0122]

Embodiment 3~9 and comparative example 3

(a) Olefin rubber

100

(b) Terpene resin

T

(d) carbon black

60

(e) Inorganic filler

10

(f) softener

90

(c) Blowing agent

15

(g) Cross-linking agent

1

(h) Vulcanization accelerator

8

total

284+T

[0123] The obtained crosslinked rubber sponge mat...

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Abstract

The present invention relates to a foam rubber material for a weather strip comprising a crosslinked rubber sponge material having a load value ratio satisfying the following relationship: load value ratio %=B / A*100<=50, wherein A is a load value at 50% compression in the course of compression deformation, and B is a load value at 50% compression in the course of returning from the deformation.

Description

technical field [0001] The present invention relates to foam rubber materials for weather strips. Background technique [0002] Foam rubber materials have been applied as sealing members to portions requiring watertight performance of various weather stripping products such as weather stripping for trunks and weather stripping for door openings. [0003] In many products, non-drying sealants are applied where watertight performance is required. However, the non-drying sealant has problems such as: (1) high manufacturing cost because expensive special equipment is required in the step of injecting the sealant into the mating portion of the product; (2) the injection amount thereof varies; (3) The sealant cannot be reassembled because it adheres to the vehicle body side once it is fitted to the vehicle body at the time of assembly; (4) Its compression set value is large (ie, compression set is poor). [0004] Patent Document 1 was made in response to these problems, and disc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/16C08L45/00C08J9/10B60R13/06C08J9/04C09J7/10
CPCC08J9/0014C08J9/0061C08J9/0066C08J9/103C08J9/105C08L23/16C08J2323/16C08L45/00C08K3/04C08K3/06C08J2201/026C08J2201/03C08J2203/04C08J2203/18C08J2300/26C08J2493/00C08L93/04C09J2400/24C08K5/0025C08L93/00C09J2423/16C09J2493/00C09J7/10C08L19/00
Inventor 木岛道夫
Owner NISHIKAWA RUBBER
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