KR20210052065A - Material for vehicle interior - Google Patents

Abstract

The present invention relates to a material for a vehicle. The material for a vehicle is manufactured into a sheet in an extruder by coating a polyolefin-based resin on long-fiber glass fibers having a length of 5 to 20 mm, cutting the glass fibers to produce pellets, and then mixing the same. Accordingly, the present invention can reduce exhaust gas by improving fuel efficiency through weight reduction, obtains excellent rigidity, can increase recyclability during disposal, and provides a material harmless to a human body.

Description

Vehicle material {MATERIAL FOR VEHICLE INTERIOR}

The present invention relates to a vehicle material, and more particularly, achieves weight reduction to reduce exhaust gas through improved fuel economy, has excellent rigidity, and can increase recyclability during disposal, and is a vehicle material that is harmless to the human body. It is about.

Conventionally, resin felt, wood powder reinforced board, paper board, and the like were used as a material for a covering self-structure for automobile interior materials.

The resin felt and the paper board are manufactured by impregnating a phenol resin or the like. Phenol resin, a curing agent, is a kind of thermosetting resin produced by the condensation reaction of phenols and aldehydes. Phenol and aldehyde released due to unreacted or incomplete combustion during incineration of phenolic resin are living environment including working environment. It acts as a pollutant of pollution, and there is a problem in that toxic gases are discharged during disposal incineration.

In addition, in the case of a substrate for automobile interior materials containing conventional glass fiber or glass chop, the problem of having a harmful effect on workers due to glass dust that may be generated during the manufacturing process and transportation process There is. In addition, an adhesive containing a volatile organic solvent for bonding the above materials must be used, and in this case, there is a problem that is harmful to the working environment and the human body.

On the other hand, the material of the conventional covering self-structure for automobile interiors is not excellent in sound insulation and heat insulation, has a high unit cost, is relatively high in weight, is easily deformed when used for a long time, is harmful to the human body, and is difficult to recycle.

The present invention is invented to solve the above problems, and achieves weight reduction to reduce exhaust gas through improved fuel economy, has excellent rigidity, and can increase recyclability during disposal, and is harmless to the human body. Its purpose is to provide vehicle materials.

In order to achieve the above object, the vehicle material according to the preferred embodiment of the present invention is coated with a polyolefin-based resin on long fiber glass fibers having a length of 5 to 20 mm, cut it, and then produced into pellets. It can be made into a sheet.

Here, the polyolefin-based resin and the long fiber glass fiber may be prepared by mixing in a ratio of 40:60 to 80:20% by weight.

In addition, when the pellets are blended, it may be produced by adding wood flour.

Here, the polyolefin resin, the long fiber glass fiber, and the wood flour may be mixed in a ratio of 30:40:30 to 75:20:5% by weight.

In addition, short fiber glass fibers with a length of 0.2 to 0.5 mm and polyolefin-based resin are compounded in an extruder and then cut into pellets, which are then blended together to form a sheet in an extruder.

Here, the polyolefin resin, the long fiber glass fiber, and the short fiber glass fiber may be mixed in a ratio of 50:40:10 to 75:20:5% by weight.

At this time, it may be produced by adding wood flour when mixing the pellets.

Here, the polyolefin resin, the long fiber glass fiber, the short fiber glass fiber, and the wood flour may be prepared by mixing in a ratio of 30:40:10:20 to 70:20:5:5% by weight.

In addition, the wood flour may be provided with an average particle size of 100 μm to 800 μm.

In addition, the long fiber glass fiber and the short fiber glass fiber may be provided with glass fibers having a diameter of 10 to 30 μm.

Furthermore, the polyolefin-based resin may be prepared by at least one of polypropylene resin, polyethylene resin, and ABS resin, or a combination thereof.

According to the vehicle material according to the present invention, it is possible to achieve weight reduction and reduce exhaust gas through improved fuel efficiency, excellent rigidity, and increase recyclability during disposal, and provide an effect of providing a material harmless to the human body. You can get it.

In order to help understand the features of the present invention, a vehicle material related to an embodiment of the present invention will be described in more detail below.

In describing the present invention, if it is determined that a detailed description of a related known configuration or function may obscure the subject matter of the present invention, a detailed description thereof will be omitted.

Hereinafter, specific embodiments of the present invention will be described.

In the vehicle material according to the first embodiment of the present invention, a polyolefin-based resin is coated on long fiber glass fibers having a length of 5 to 20 mm, cut into pellets, and then blended to produce a sheet in an extruder.

Here, if the length of the long fiber glass fibers is less than 5 mm, the strength cannot be expected to increase, and if the length of the long fiber glass fibers exceeds 20 mm, there is a problem that local deformation occurs or strength is decreased.

In addition, the vehicle material may be produced by mixing the polyolefin-based resin and the long fiber glass fiber in a ratio of 40:60 to 80:20% by weight. That is, when the long fiber glass fiber is contained in an amount of less than 20% by weight, strength improvement is insignificant, and thus it is difficult to reduce the weight of an existing material, and there is a problem in that the characteristics required by vehicle parts cannot be satisfied. And, if the long fiber glass fiber is contained in excess of 60% by weight, the weight of the material itself increases, making it difficult to reduce weight, and mass production due to equipment overload when manufacturing in the form of a board or sheet to manufacture as a vehicle component There is a problem that the process is impossible.

It is preferable to use glass fibers having a diameter of 10 to 30 μm as the long fiber glass fibers. In other words, if the glass fiber has a diameter of less than 10 µm, agglomeration occurs inside the extruder and dispersibility decreases, so that it is difficult to expect an increase in strength. In addition, when a glass fiber having a diameter of more than 30 μm is used, the dispersibility decreases, there is a problem that local deformation occurs during molding of automobile parts, and the strength decreases.

In addition, the polyolefin-based resin may be provided with at least one of polypropylene resin, polyethylene resin, and ABS resin, or a combination thereof.

In the vehicle material according to the second embodiment of the present invention, a polyolefin-based resin is coated on long fiber glass fibers having a length of 5 to 20 mm and cut into pellets, which are then blended with wood powder to produce a sheet in an extruder. In addition, it is preferable to use a glass fiber having a diameter of 10 to 30 μm as the long fiber glass fiber.

Here, the polyolefin-based resin, the long fiber glass fiber, and the wood flour may be mixed in a ratio of 30:40:30 to 75:20:5% by weight to be manufactured. That is, when the wood powder is contained in an amount exceeding 30% by weight, the specific gravity increases, making it difficult to achieve weight reduction, and there is a problem of adversely affecting the increase in odor of the part due to carbonization during molding.

The wood flour may be provided with an average particle size of 100 μm to 800 μm. In this case, if the wood powder having an average particle size of less than 100 μm is used, dispersibility may be reduced during manufacture, resulting in product non-uniformity, and thus, there is a problem in that it is difficult to reinforce rigidity. In addition, when the wood powder has an average particle size of more than 800 µm, it is difficult to uniformly disperse, and thus, there is a problem in that the parts are deformed or physical properties are not uniform during the production of the parts.

In addition, the polyolefin-based resin may be provided with at least one of polypropylene resin, polyethylene resin, and ABS resin, or a combination thereof.

The vehicle material according to the third embodiment of the present invention includes pellets produced by coating a polyolefin-based resin on long fiber glass fibers having a length of 5 to 20 mm and cutting them, and short fiber glass fibers and polyolefins having a length of 0.2 to 0.5 mm. After the resin is compounded in an extruder, the pellets are cut into 2-3 mm, and the resulting pellets are mixed together to form a sheet in an extruder.

Here, if the length of the short fiber glass fibers is less than 0.2 mm, agglomeration occurs in the extruder, resulting in lower dispersibility, thereby making it difficult to expect an effect of increasing strength, and an increase in strength is expected by the aspect ratio. There is a problem that is difficult to do. In addition, if the length of the short fiber glass fibers exceeds 0.5 mm, dispersibility is lowered, and there is a problem in that local deformation occurs during molding of automobile parts, and strength is deteriorated.

In addition, it is preferable to use a glass fiber having a diameter of 10 to 30 μm as the long fiber glass fiber and the short fiber glass fiber.

Here, the polyolefin resin, the long fiber glass fiber, and the short fiber glass fiber may be prepared by mixing in a ratio of 50:40:10 to 75:20:5% by weight. That is, when the short fiber glass fiber is contained in an amount of less than 5% by weight, the long fiber glass fiber is extremely oriented in a single direction, and thus there is a problem in that the strength according to the direction is very non-uniform. In addition, when the short fiber glass fiber is contained in an amount exceeding 10% by weight, there is a problem in that it is difficult to achieve weight reduction because it is difficult to increase strength compared to a material containing a relatively large amount of long fiber glass fiber.

In addition, the polyolefin-based resin may be provided with at least one of polypropylene resin, polyethylene resin, and ABS resin, or a combination thereof.

The vehicle material according to the fourth embodiment of the present invention includes pellets produced by coating a polyolefin-based resin on long fiber glass fibers having a length of 5 to 20 mm and cutting them, and short fiber glass fibers and polyolefins having a length of 0.2 to 0.5 mm. The resin is compounded in an extruder and then cut into pellets, and wood powder is mixed together to produce a sheet in an extruder. In addition, it is preferable to use a glass fiber having a diameter of 10 to 30 μm as the long fiber glass fiber and the short fiber glass fiber.

Here, the polyolefin resin, the long fiber glass fiber, the short fiber glass fiber, and the wood flour may be prepared by mixing in a ratio of 30:40:10:20 to 70:20:5:5% by weight.

In addition, the polyolefin-based resin may be provided with at least one of polypropylene resin, polyethylene resin, and ABS resin, or a combination thereof.

Example

Hereinafter, a vehicle material (Examples 1 to 5) according to the first to fourth embodiments of the present invention will be described in comparison with a conventional vehicle material (Comparative Example 1).

Here, in Examples 1 to 5, polypropylene (PP) resin was used among polyolefin-based resins, and glass fibers having a diameter of 20 μm and a length of 10 mm were used as long fiber glass fibers.

Wood flour included in Examples 2, 3, and 5 was used having an average particle size of 400 μm. In addition, as for the short fiber glass fibers of Examples 4 to 5, glass fibers having a diameter of 20 μm and a length of 0.3 mm were used.

Comparative Example 1 is a material made of a single layer generally used as a material for a vehicle in the related art, and was produced by mixing a polypropylene resin and wood powder.

The configurations of the vehicle materials of Examples 1 to 5 and Comparative Example 1 are shown in Table 1 below.

division Configuration Example 1 70% PP + 30% long fiber glass fiber Example 2 50% PP + 30% long fiber glass fiber + 20% wood flour Example 3 70% PP + 24% long fiber glass + 6% wood flour Example 4 70% PP + 24% long fiber glass + 6% short fiber glass fiber Example 5 46% PP + 30% long fiber glass fiber + 6% short fiber glass fiber + 18% wood flour Comparative Example 1 50% PP + 50% wood flour

The material prepared in the weight ratio disclosed in Table 1 was prepared as a specimen, and the maximum load, flexural strength, and flexural modulus were measured, and are shown in Table 2 below.

Example 1 Example 2 Example 3 Example 4 Example 5 Comparative Example 1 Gross weight[g/m ² ] 3,268 2,835 3,118 3,084 2,889 3,450 Load [kgf] 28.2 12.4 19.4 26.3 15 11.5 Flexural strength [MPa] 113.9 54.5 78.5 106 64 37 Flexural modulus [MPa] 8,340 3,730 5,589 6,714 5,257 3,113

As disclosed in Table 2, it can be seen that the vehicle material (Examples 1 to 5) according to the embodiment of the present invention has a very low total weight in a similar strength range compared to the current vehicle interior material (Comparative Example 1). . That is, weight reduction can be achieved while satisfying the target strength.

More specifically, in Comparative Example 1, the maximum load, flexural strength, and flexural modulus were all lower than those of Examples 1 to 5 of the present invention, while the total weight was the heaviest. That is, it can be seen that Example 2, which shows a maximum load similar to Comparative Example 1, can achieve weight reduction by about 20%, increase the flexural strength by about 50%, and increase the flexural modulus by about 20%, thereby increasing the strength. .

As described above, although the present invention has been described by the limited embodiments and drawings, the present invention is not limited thereto, and the technical idea of the present invention and the following by those of ordinary skill in the art to which the present invention pertains. It goes without saying that various modifications and variations are possible within the equivalent range of the claims to be described.

Claims (11)

A vehicle material produced by coating a polyolefin resin on long fiber glass fibers with a length of 5 to 20 mm, cutting it into pellets, and then blending it into a sheet using an extruder.
The method of claim 1,
The material for a vehicle, characterized in that the polyolefin resin and the long fiber glass fibers are mixed in a ratio of 40:60 to 80:20% by weight.
The method of claim 1,
Vehicle material, characterized in that when the pellets are blended, wood flour is additionally added.
The method of claim 3,
The material for a vehicle, characterized in that the polyolefin resin, the long fiber glass fiber, and the wood powder are mixed in a ratio of 30:40:30 to 75:20:5% by weight.
The method of claim 1,
A vehicle material, characterized in that a short fiber glass fiber having a length of 0.2 to 0.5 mm and a polyolefin-based resin are compounded in an extruder and then cut into pellets, which are then mixed together to form a sheet in an extruder.
The method of claim 5,
The polyolefin resin, the long fiber glass fiber, and the short fiber glass fiber are mixed in a ratio of 50:40:10 to 75:20:5% by weight.
The method of claim 5,
Vehicle material, characterized in that when the pellets are blended, wood flour is additionally added.
The method of claim 7,
The polyolefin resin, the long fiber glass fiber, the short fiber glass fiber, and the wood powder are mixed in a ratio of 30:40:10:20 to 70:20:5:5% by weight of a vehicle material.
The method according to claim 3 or 7,
The wood flour,
Vehicle material, characterized in that provided with an average particle size of 100㎛ to 800㎛.
The method of claim 5,
The long fiber glass fiber and the short fiber glass fiber,
Vehicle material, characterized in that provided with a glass fiber diameter of 10 ~ 30㎛.
The method of claim 5,
The polyolefin resin,
Vehicle material, characterized in that provided with at least one of polypropylene resin, polyethylene resin, ABS resin, or a combination thereof.