JP2007176257A - Sponge rubber product for automobile - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sponge rubber product for an automobile that does not generate an abnormal gummy sound in opening a door, etc. when used as a sealant for the automobile and to prevent the adhesion of the product with others when a plurality of the sponge rubber products are accumulated on one another when used as sheet products such as sound insulating sheets. <P>SOLUTION: This sponge rubber product for the automobile is used as a sealant for the automobile and the sound insulating sheet and has a foaming sponge part F on a part or over the whole of the product, and a fatty acid amide system lubricant, a fatty acid silicon system lubricant, a fatty acid ester system lubricant or a resin system lubricant is added to a rubber material forming the foaming sponge part F. It is desirable to add a 0.01 to 5 weight part and favorably a 0.01 to 3 weight part of the fatty acid amide system lubricant out of the lubricants. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a sponge rubber product having a foamed sponge part on a part or the whole of an automotive part such as a weather strip or glass run for an automobile or a sound insulation sheet attached to an automobile door.

  This will be described with reference to FIGS. As a sealing material for automobiles, a weather strip 10 having a hollow seal portion 11 made of sponge rubber as shown in FIG. 2, a glass run 20 in which sponge rubber is provided in the lip portion 21 and the hollow portion 22 as shown in FIG. 3, Alternatively, as shown in FIG. 5, a glass run 20 made entirely of fine foam sponge rubber is used. Further, a sound insulation sheet 30 made of high foam sponge rubber as shown in FIG.

  Among these sponge rubber products 1, for example, in the weather strip 10 attached along the body opening edge, when the door 2 is opened, the hollow seal portion 11 that has been crushed until then returns to its original shape, There is a problem of generating an unusual sound “Necha”. Further, the glass run 20 also has a problem that when the door glass 3 is opened, when the lip portion 21 that has been elastically deformed until then returns to its original shape, an abnormal noise “Necha” is similarly generated. These abnormal sounds are considered to be because the hollow seal portion 11 and the lip portion 21 have more adhesiveness than necessary.

  Furthermore, in the sound insulation sheet 30 made of highly foamed sponge rubber, the amount of oil is as large as 70 to 100 parts by weight with respect to the amount of oil adsorbing material such as carbon being 50 to 70 parts by weight. Is sticky. Therefore, when the sound insulation sheets 30 are stacked and stored, there is a problem that upper and lower sheets stick to each other due to their own weight. As a result, there are problems that handling is troublesome because it takes time to peel off, and that the number of stacked sheets must be reduced, resulting in increased transportation costs and storage costs.

  The present invention was devised in view of these problems, and when used as a sealing material for automobiles, it does not generate an unusual noise when opening a door or the like, and is a sheet such as a sound insulating sheet. When used as a shaped product, it is an object to provide a sponge rubber product for automobiles in which the products do not stick to each other when stacked.

  This will be described with reference to FIGS. The automobile sponge rubber product 1 according to claim 1 is used as an automobile part and has a foamed sponge part F in part or in its entirety, and the foamed sponge is used to reduce adhesiveness. It is characterized in that a lubricant is added to the rubber material forming the part F.

  Here, the lubricant is a fatty acid amide, fatty acid silicone, fatty acid ester, fatty acid metal salt, resin or the like.

  The sponge rubber product 1 for automobiles according to claim 2 is used as a seal material for automobiles, and has a foamed sponge part F in part or in its entirety, and generates abnormal noise by reducing adhesiveness. In order to prevent this, 0.01 to 5 parts by weight, preferably 0.01 to 3 parts by weight of a fatty acid amide lubricant is added to the rubber material forming the foamed sponge part F. .

  The sponge rubber product 1 for an automobile according to claim 3 is used as a sound insulation sheet 30 for an automobile, and has a high foamed sponge part H in part or in its entirety, and reduces the adhesiveness between the products. In order to prevent sticking, 0.5 to 5 parts by weight, preferably 1 to 5 parts by weight of a fatty acid amide-based lubricant is added to the rubber material forming the highly foamed sponge part H. To do.

  In the sponge rubber product 1 for automobiles according to the first aspect, since the lubricant is added to the rubber material forming the foamed sponge portion F, the slipperiness is improved and the adhesiveness is lowered by the action of the lubricant. Therefore, for example, when the product is a sealing material, it is possible to prevent the occurrence of an abnormal noise called “Necha” when returning from the door 2 or the door glass 3 to the original shape. Moreover, when the said product is the sound insulation sheet 30, even if it piles up, it can peel easily.

  The invention according to claim 2 is that the sponge rubber product 1 is a sealing material for automobiles, and the rubber material forming the foamed sponge portion F is 0.01 to 5 parts by weight, preferably 0. Since 01-3 weight part was added, the slipperiness of the foaming sponge part F improves with the said lubricant, and adhesiveness falls. Therefore, for example, no abnormal noise is generated when leaving the door 2 or the like.

  The automobile sponge rubber product 1 according to claim 3 is used as a sound insulation sheet 30, and a fatty acid amide-based lubricant is added in an amount of 0.5 to 5 wt. Part, preferably 1 to 5 parts by weight, improves slipperiness and lowers the tackiness. Therefore, when peeling one sheet at a time from a state in which a large number of sheets are stacked, they are not attached to the other sound insulation sheets 30 and can be easily peeled off.

  1 and 2 show a first embodiment of a sponge rubber product 1 for automobiles according to the present invention. This is a weather strip 10 attached along the door opening edge of an automobile body, and has a mounting base 12 that is assembled in a body flange with a substantially U-shaped cross section and a hollow seal portion 11 that elastically contacts the door 2. The hollow seal portion 11 is foamed to form a foamed sponge portion F, and 0.01 to 3 parts by weight of a fatty acid amide lubricant is added to the rubber material forming the foamed sponge portion F. The attachment base 12 is a solid rubber part S. In the present embodiment, an unsaturated fatty acid amide having a carbon chain of C10 to C25 (erucic acid amide “Stractol TR131” manufactured by Stractol Co.) is used as the fatty acid amide lubricant. In addition, the addition amount should just be between 0.01-5 weight part.

  Thereby, the slipperiness of the surface of the hollow seal part 11 improves, and adhesiveness falls. Therefore, when the door 2 is closed and the hollow seal portion 11 is crushed, when the door 2 is opened and the hollow seal portion 11 is restored to its original shape, or when the door 2 is separated from the door 2, a “necha” has been generated. The generation of abnormal noise is prevented.

  That is, the automotive seal material is a weather strip 10 having a mounting base 12 having a substantially U-shaped cross section and a hollow seal portion 11, and the hollow seal portion 11 is a foamed sponge portion F. Occurrence of an abnormal noise “Necha” that occurred when the door 2 was opened and returned to its original shape from the state in which the hollow seal portion 11 was crushed by elastic contact with the door 2, for example, due to the improvement in adhesion and the decrease in adhesiveness Can be prevented in advance.

  A second embodiment of a sponge rubber product 1 for automobiles according to the present invention is shown in FIG. 1, FIG. 3 and FIG. This is a glass run 20 having a seal bridge 24 provided with a lip portion 21 and a hollow portion 22 elastically contacting the door glass 3, and is a portion of the glass run along the substantially horizontal side 5 at the top of the sash. The lip portion 21 and the seal bridge 24 are a foamed sponge portion F, and the remaining base portion 23 is a solid rubber portion S. Then, 0.01 to 3 parts by weight of a fatty acid amide-based lubricant (“Stractol TR131”) is added to the foamed sponge part F rubber material forming the lip part 21 and the seal bridge 24.

  Since the lip portion 21 and the seal bridge 24 of the glass run 20 are added with a predetermined amount of fatty acid amide-based lubricant, the slipperiness is improved and the adhesiveness is lowered, so that the door glass 3 is closed and the hollow portion 22 is crushed. In this state, the noise “Necha” generated when the door glass 3 is opened and the seal bridge 24 returns to the original shape is not generated. Alternatively, it is possible to prevent the problem of non-recovery that occurs when the adhesion is severe.

FIG. 1 and FIG. 5 show a third embodiment of a sponge rubber product 1 for automobiles according to the present invention. This is a glass run 20 having a pair of lip portions 21 elastically contacting the door glass 3, and the entire glass run 20 is a foamed sponge portion (fine foam) F.

That is, since at least the lip portion 21 elastically contacting the door glass 3 is the foamed sponge portion F, the lip portion 21 is elastically contacted to the door glass 3 due to the improvement of the slipperiness due to the operation of the sliding material and the decrease in the adhesiveness. From the elastically deformed state, it is possible to prevent the occurrence of an abnormal sound “necha” that was generated when the door glass 3 was opened and returned to its original shape.

  4 and 6 show a fourth embodiment of a sponge rubber product 1 for automobiles according to the present invention. This is used as a sound insulation sheet 30 attached to the indoor side of the automobile door 2, and the whole is formed of a high foamed sponge portion H. This sound insulating sheet 30 is obtained by adding 1.5 parts by weight of a fatty acid amide lubricant (“Stractol TR131”) to the rubber material forming the sound insulating sheet 30. Thereby, slipperiness improves, adhesiveness falls, and when it peels one sheet at a time from the state which piled up many sheets, it does not stick to the other sound-insulation sheet | seat 30, Therefore It can peel easily. In addition, the addition amount should just be the range of 0.5-5 weight part.

  The inventors of the present invention confirmed the relationship between the addition amount of this fatty acid amide lubricant (“Stractol TR131”) and the generation of abnormal noise by experiments. This experiment is a sound pressure evaluation by frequency analysis. After crushing a sample of the hollow seal portion 11 having a length of 50 mm with a constant load, an abnormal sound (necha sound) when released is picked up with a microphone and analyzed. The sound pressure in all frequency ranges is calculated as one sound. A. (Overall) value. The result is shown in FIG.

  The inventors also confirmed the relationship between the amount of the fatty acid amide-based lubricant (“Stractol TR131”) and the wear resistance by experiments. The result is shown in FIG. In this experiment, as shown in FIG. 9, a glass plate 41 (width 20 mm, thickness 3.5 mm, rubbing surface (curved surface) R10 mm) is repeated in parallel with a load of 250 gf on a sheet-like sample 40 whose surface is coated. This is done by measuring the number of times of movement at the time of wear and when wear occurs.

  From the results shown in FIG. 7, it was found that the abnormal noise (sound pressure level) decreases as the amount of fatty acid amide-based lubricant added increases. Moreover, from the result shown in FIG. 8, when the addition amount of the fatty acid amide type lubricant exceeded 3 weight part, it discovered that abrasion resistance fell remarkably. Therefore, it was recognized that the range of 0.01 to 3 parts by weight is preferable in order to prevent the generation of abnormal noise without reducing the wear resistance.

  The present inventors conducted an experiment to investigate the relationship between the amount of fatty acid amide-based lubricant (“Stractol TR131”) added and the tackiness of the sound insulating sheet 30 according to the present embodiment by the method shown in FIG. . In this experiment, as shown in FIG. 10, the sound insulation sheet (sample) 30 is attached to each of the lower sheet metal 43 (fixed) and the upper sheet metal 42, and the sound insulation sheets 30 are overlapped with each other. A weight of 500 gf was placed on 42 and allowed to stand for one day, and then the upper sheet metal 42 was pulled in the vertical direction at a constant speed of 50 mm / min and peeled off. The result is shown in FIG. In addition, the lubricant is not added to the conventional product.

  From the results shown in FIG. 11, it was confirmed that when the amount of the fatty acid amide-based lubricant added increased, the adhesive strength between the sound insulating sheets 30 is reliably reduced. In the present invention, the addition amount of the fatty acid amide lubricant is 0.5 to 5 parts by weight. However, if the amount is less than 0.5 parts by weight, the sound insulating sheet 30 cannot be prevented from sticking. If the amount is more than 5 parts by weight, it is not preferable because it is deposited on the surface and the appearance deteriorates, and even if it is added more than 5 parts by weight, there is no change in the sticking prevention effect, which is not preferable from the viewpoint of cost. It is.

  The sponge rubber product 1 for automobiles according to the present invention is not limited to the weather strip 10, the glass run 20, and the sound insulation sheet 30, but includes various sealing materials such as a door weather strip and a roof side weather strip. Includes all products for automobiles.

It is a side view which shows the motor vehicle which attached the sponge rubber product for motor vehicles. It is sectional drawing which shows the weather strip provided along the door opening edge of a motor vehicle body. It is a vertical sectional view showing a state in which a door glass is closed by a glass run attached to an upper substantially horizontal sash portion. It is a vertical sectional view showing a state in which a door glass is opened by a glass run attached to an upper substantially horizontal sash portion. It is a horizontal sectional view which shows the glass run attached to the substantially vertical sash part. It is a side view which shows the sound insulation sheet attached to the door of a motor vehicle. It is a graph which shows the relationship between the addition amount of a fatty acid amide type lubricant, and generation | occurrence | production of abnormal noise. It is a graph which shows the relationship between a fatty acid amide type | system | group lubricant and abrasion resistance. It is explanatory drawing which shows the experimental form of abrasion resistance. It is explanatory drawing which shows the experimental form of adhesiveness. It is a graph which shows the relationship between the addition amount of a fatty-acid amide type lubricant, and adhesiveness.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sponge rubber product 2 Door 3 Door glass 4 Body 5 Upper horizontal sash part 6 General vertical sash part 10 Weather strip 11 Hollow seal part 12 Mounting base 20 Glass run 21 Lip part 22 Hollow part 23 Base 24 Seal bridge 30 Sound insulation sheet 40 Sheet-like sample with painted surface 41 Glass plate 42 Upper sheet metal 43 Lower sheet metal F Foam sponge part H High foam sponge part S Solid rubber part

Claims (3)

  A sponge rubber product that is used as an automotive part and has a foamed sponge part (F) in part or in its entirety. In order to reduce adhesiveness, a lubricant is applied to the rubber material forming the foamed sponge part. Sponge rubber products for automobiles characterized by the addition.   A sponge rubber product that is used as a sealing material for automobiles and has a foamed sponge part (F) in part or in its entirety, in order to reduce the adhesiveness and prevent the generation of abnormal noise, the foamed sponge part A sponge rubber product for automobiles, characterized in that 0.01 to 5 parts by weight, preferably 0.01 to 3 parts by weight, of a fatty acid amide-based lubricant is added to the rubber material forming the above. A sponge rubber product that is used as a sound insulation sheet (30) for automobiles and has a highly foamed sponge part (H) in part or in its entirety, in order to reduce stickiness and prevent sticking between products A sponge rubber product for automobiles, which is obtained by adding 0.5 to 5 parts by weight, preferably 1 to 5 parts by weight of a fatty acid amide lubricant to the rubber material forming the highly foamed sponge part H.

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