KR102278645B1 - Material for vehicle interior - Google Patents

Abstract

The present invention relates to a vehicle material, wherein the vehicle material is prepared by coating a polyolefin-based resin on long-fiber glass fibers having a length of 5 to 20 mm, cutting it to produce pellets, and then mixing it to produce a sheet in an extruder. With this configuration, it is possible to achieve weight reduction to reduce exhaust gas through improved fuel efficiency, to have excellent rigidity, to increase recyclability during disposal, and to provide an effect of providing a material harmless to the human body.

Description

Material for vehicle {MATERIAL FOR VEHICLE INTERIOR}

The present invention relates to a material for a vehicle, and more particularly, it is possible to achieve weight reduction to reduce exhaust gas through improved fuel efficiency, to have excellent rigidity, and to increase recyclability at the time of disposal, and to be harmless to the human body. is about

Conventionally, resin felt, wood flour reinforced board, paper board, etc. have been used as a material of a self-structured covering for automobile interior materials.

The resin felt and paper board are manufactured by impregnating with phenol resin. Phenolic resin as a curing agent is a type 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 It acts as a pollutant of the air, and there is a problem of emitting toxic gas when it is incinerated.

In addition, in the case of a conventional substrate for interior materials for automobiles containing glass fibers or glass chops, glass dust that may be generated during the manufacturing process and transporting process has a detrimental effect on workers. there is And it is necessary to use an adhesive containing a volatile organic solvent for adhering the above material, in this case, there is a problem harmful to the working environment and the human body.

On the other hand, the conventional material of the covering self-structure for the interior of a vehicle is not excellent in sound insulation and heat insulation, has a high unit price, is relatively high in weight, is easily deformed during long-term use, is harmful to the human body, and is difficult to recycle.

The present invention was devised to solve the above problems, and it is possible to reduce exhaust gas through improvement of fuel efficiency by achieving weight reduction, and to have excellent rigidity, as well as to increase recyclability during disposal, and is harmless to the human body. An object of the present invention is to provide a material for a vehicle.

In order to achieve the above object, a vehicle material according to a preferred embodiment of the present invention is coated with a polyolefin-based resin on a long fiber glass fiber having a length of 5 to 20 mm, cut and manufactured into pellets, and then blended in an extruder. It can be made from sheets.

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

And, it can be produced by adding wood flour when mixing the pellets.

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.

In addition, short fiber glass fibers having a length of 0.2 to 0.5 mm and a polyolefin-based resin may be compounded in an extruder and then cut, and pellets prepared by cutting may be mixed together to produce a sheet in the extruder.

Here, the polyolefin-based 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.

In this case, the pellet may be prepared by additionally adding wood flour when mixing.

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

In addition, the wood powder 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 as at least one of a polypropylene resin, a polyethylene resin, and an ABS resin, or a combination thereof.

According to the material for a vehicle according to the present invention, it is possible to achieve weight reduction, thereby reducing exhaust gas through improved fuel efficiency, and having excellent rigidity, as well as increasing recyclability at the time of disposal, and providing an effect of providing a material harmless to the human body. can be obtained

In order to help understanding of 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 gist of the present invention, the detailed description thereof will be omitted.

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

The vehicle material according to the first embodiment of the present invention is prepared by coating a polyolefin-based resin on long-fiber glass fibers having a length of 5 to 20 mm, cutting them to produce pellets, and then mixing them to produce a sheet in an extruder.

Here, when the length of the long fiber glass fiber is less than 5 mm, an increase in strength cannot be expected, and when the length of the long fiber glass fiber exceeds 20 mm, there is a problem in that local deformation occurs or the strength is lowered.

In addition, the vehicle material may be manufactured 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, there is a problem in that the strength improvement is insignificant, so that it is difficult to reduce the weight of the existing material, and there is a problem in that the characteristics required for vehicle parts cannot be satisfied. In addition, when the long fiber glass fiber is contained in excess of 60% by weight, the specific gravity of the material itself increases and there is a problem in that it is difficult to reduce the weight, and mass production due to equipment overload when manufactured in the form of a board or sheet for manufacturing a vehicle part There is a problem that the process is impossible.

As the long fiber glass fiber, it is preferable to use a glass fiber having a diameter of 10 to 30 μm. That is, when a glass fiber having a diameter of less than 10 μm is used, agglomeration occurs inside the extruder, and dispersibility is lowered, so that it is difficult to expect strength increase. And, when the diameter of the glass fiber exceeds 30 μm, dispersibility is lowered, there is a problem that local deformation occurs during molding of automobile parts, and there is a problem that the strength is lowered.

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

The vehicle material according to the second embodiment of the present invention is manufactured by coating a polyolefin-based resin on long-fiber glass fibers having a length of 5 to 20 mm, cutting it to produce pellets, and mixing it with wood flour to form 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 powder may be mixed in a ratio of 30:40:30 to 75:20:5% by weight. That is, when the wood powder contains more than 30% by weight, the specific gravity increases and it is difficult to achieve weight reduction, and there is a problem that adversely affects the increase in odor of parts due to carbonization during molding.

The wood powder may have 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 is lowered during manufacture, and product non-uniformity may occur, which may cause difficulty in reinforcing rigidity. In addition, when the average particle size of the wood powder exceeds 800 μm, it is difficult to uniformly disperse, so there is a problem in that the parts are deformed or the physical properties are not uniform during the production of the parts.

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

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

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

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-based 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, since the long fiber glass fiber is extremely oriented in a single direction, there is a problem in that the strength according to the directionality is very non-uniform. In addition, when the short-fiber glass fiber is contained in excess of 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 prepared by using at least one of a polypropylene resin, a polyethylene resin, and an ABS resin, or a combination thereof.

The vehicle material according to the fourth embodiment of the present invention includes pellets prepared by cutting and coating polyolefin-based resin on long-fiber glass fibers having a length of 5 to 20 mm, and short-fiber glass fibers and polyolefins having a length of 0.2 to 0.5 mm. After compounding the resin in the extruder, the pellets produced by cutting and wood flour are mixed together to produce a sheet in the 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 mixed in a ratio of 30:40:10:20 to 70:20:5:5% by weight.

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

Example

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

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

The wood powder included in Examples 2, 3, and 5 had an average particle size of 400 μm. And, as 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 single-layer material generally used as a conventional vehicle material, and was produced by mixing polypropylene resin and wood flour.

The composition of the vehicle material of Examples 1 to 5 and Comparative Example 1 is shown in Table 1 below.

division Configuration Example 1 PP 70% + Long Fiber Glass 30% Example 2 PP 50% + Long Fiber Glass Fiber 30% + Wood Flour 20% Example 3 PP 70% + Long Fiber Glass Fiber 24% + Wood Flour 6% Example 4 70% PP + 24% Long Fiber Glass Fiber + 6% Short Fiber Glass Fiber Example 5 PP 46% + Long Fiber Glass Fiber 30% + Short Fiber Glass Fiber 6% + Wood Flour 18% Comparative Example 1 PP 50% + Wood flour 50%

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 described 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 Maximum 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 total weight of the vehicle material (Examples 1 to 5) according to the embodiment of the present invention is very low 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, Comparative Example 1 showed that the maximum load, flexural strength, and flexural modulus were all lower than Examples 1 to 5 of the present invention, while the total weight was the heaviest. That is, Example 2, which shows a maximum load similar to that of Comparative Example 1, can achieve about 20% weight reduction, and it can be seen that the strength can be increased by increasing the flexural strength by about 50% and the flexural modulus by about 20%. .

As described above, although the present invention has been described with reference to 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. Of course, various modifications and variations are possible within the scope of equivalents of the claims to be described.

Claims (11)

Long-fiber glass fibers with a length of 5 to 20 mm and short fiber glass fibers with a length of 0.2 to 0.5 mm are coated with polyolefin resin, cut and made into pellets, and then mixed with wood flour to produce a sheet in an extruder
The wood powder is provided with an average particle size of 550 μm to 800 μm,
The long fiber glass fiber and the short fiber glass fiber are provided with glass fibers having a diameter of 21 to 30 μm,
The polyolefin-based resin, the long fiber glass fiber, the short fiber glass fiber, and the wood flour are mixed in a ratio of 30:40:10:20 to 70:20:5:5% by weight. delete delete delete delete delete delete delete delete delete delete