KR102046137B1 - Manufacturing Method of Car Navigation Cover Using Recycled PC/ABS Resin Compound - Google Patents

Abstract

The present invention relates to a method of manufacturing a vehicle navigation cover using a recycled PC / ABS resin composition, including the step of forming a recycled PC / ABS resin compound, wherein the recycled PC / ABS resin compound is a recycled PC resin and a recycled ABS resin Preparing a regenerated PC / ABS resin, mixing a reinforcement additive with the reinforcement PC / ABS resin to prepare a mixture, and extruding the mixture to prepare a resin compound. .

Description

Manufacturing Method of Car Navigation Cover Using Recycled PC / ABS Resin Compound}

The present invention relates to a method for manufacturing a vehicle navigation cover using a recycled PC / ABS resin compound, and more particularly, to a car navigation system by applying a resin compound having excellent weather resistance, rigidity, and moldability using recycled PC / ABS resin as a raw material. It relates to a method of manufacturing a cover.

Polycarbonate (PC) resin is applied to various applications such as construction sunscreen, bottled water bottle, etc.Acrylonitrile-butadiene-styrene (ABS) resin is applied to antenna cover for mobile communication, case of home appliance, and recycles waste after use. Techniques for doing so are being developed.

For example, Korean Patent Laid-Open Publication No. 10-2000-0062906 discloses a technique for preparing recycled PC / ABS resin and using it as a flooring material. To this end, impurities are removed by using a separate cleaning agent.

In addition, the Republic of Korea Patent Publication No. 10-0884222 is adding a PC to the ABS resin, but to produce a recycled resin of the desired physical properties by limiting the B / A ratio, the Republic of Korea Patent Publication No. 10-2018-0009144 PC and ABS Disclosed is a method of coextrusion to produce a PC / ABS resin.

However, the above prior arts only optimize the washing conditions, mixing ratios, mixing conditions, and the like of PC and ABS, and do not mention the control of physical properties according to the recycling use of recycled PC / ABS.

On the other hand, Korean Patent Publication No. 10-1271250 discloses the desired tensile strength, impact strength, melt index, flexural strength, by adding additives such as antioxidants, dispersants, dyes, reinforcing agents, flame retardants, waste SAN to PC / ABS resin, Characteristics such as flame retardancy and color degree are achieved.

In the prior art, the waste SAN and the reinforcing agent are mixed to suppress the peeling phenomenon of the PC / ABS resin and improve the moldability, but the physical properties of the manufactured PC / ABS resin may be applied to an automobile navigation cover requiring rigidity. There is a problem.

Republic of Korea Patent Application Publication No. 10-2000-0062906 Republic of Korea Patent Publication No. 10-0884222 Republic of Korea Patent Application Publication No. 10-2018-0009144 Republic of Korea Patent Publication No. 10-1271250

The present invention has been made in view of the prior art as described above, and an object thereof is to provide a method for manufacturing a vehicle navigation cover that exhibits physical properties that can be molded into a vehicle navigation cover using a recycled PC / ABS resin compound.

The method of manufacturing a vehicle navigation cover of the present invention for solving the above problems is a method of manufacturing a vehicle navigation cover comprising the step of molding a recycled PC / ABS resin compound, the recycled PC / ABS resin compound is a recycled PC Preparing a regenerated PC / ABS resin by mixing a resin and a regenerated ABS resin, mixing a strength reinforcing additive with the regenerated PC / ABS resin to prepare a mixture, and extruding the mixture to prepare a resin compound. Characterized in that.

At this time, the recycled PC / ABS resin is preferably a weight ratio (PC / ABS) of the PC to ABS is 1.85 to 3.00.

The strength reinforcing additive may be a silane coupling agent and an alumina nanoparticle, and the alumina nanoparticle may be an alumina nanorod having a diameter of 200 to 500 nm and a width of 2 to 5 nm.

In addition, new PC / ABS resin may be further mixed with the regenerated PC / ABS resin.

The method of manufacturing a vehicle navigation cover according to the present invention exhibits the effect of manufacturing a vehicle navigation cover having excellent weather resistance, rigidity, and moldability suitable for a vehicle navigation cover using a recycled PC / ABS resin compound.

Hereinafter, the present invention will be described in more detail. The terms or words used in this specification and claims are not to be construed as being limited to their ordinary or dictionary meanings, and the inventors may appropriately define the concept of terms in order to best describe their invention. It should be interpreted as meaning and concept corresponding to the technical idea of the present invention based on the principle that the present invention.

Regenerated PC / ABS resin compound, which is a term used in the present invention, refers to a recycled resin compound prepared by extrusion molding a regenerated PC / ABS composition prepared by mixing a regenerated PC / ABS resin and an additive. In addition, new PC / ABS resin is a term referring to general PC / ABS resin, not regenerated resin.

The method for manufacturing a vehicle navigation cover according to the present invention is to produce by molding a resin compound. The molding method can be applied as long as it is a conventional molding method, it can be produced by a method such as injection molding, extrusion molding, press molding. In particular, injection molding which injects a PC / ABS resin compound into an injection apparatus and injects it into a mold in a molten state thereof is advantageous.

A recycled PC / ABS resin compound is used as the resin compound used in the molding process, wherein the recycled PC / ABS resin compound is prepared by mixing a recycled PC resin and a recycled ABS resin to produce a recycled PC / ABS resin. Mixing the strength reinforcing additive in the / ABS resin to prepare a mixture, and extruding the mixture to prepare a resin compound.

The recycled PC resin and the recycled ABS resin are pulverized waste plastics, and are preferably pretreated through a washing process to remove dirt, foreign matters, and the like. The washing process may use a high-speed washing machine or a general washing machine, and after washing, it is preferable to use the dryer after removing moisture.

The recycled PC / ABS resin compound may be prepared by mixing the pretreated recycled PC resin and the recycled ABS resin as described above and extruding it using a twin screw extruder. Since the extrusion molding using a twin screw extruder, the waste plastic is preferably pulverized to a size of 5 ~ 30mm, it is more preferable to use a crushed to a size of 12 ~ 16mm. If the size of the pulverized product is too large, the process speed or efficiency is reduced when performing the extrusion process in a twin screw extruder, and if it is too small, fine powder is generated, so it is preferable to grind in the above range.

Optimizing the process conditions of the twin screw extruder in the process of manufacturing the resin compound through the twin screw extruder also affects the physical properties of the obtained resin compound. The L / D (Length / Diameter) of the twin screw extruder can be used under normal conditions, but it has been found that using a range of 1/32 to 1/52 is a condition that can obtain high reproducible physical properties. If it is out of the above range while passing through the twin-screw extruder, the dispersibility of the component is worse and the defective rate of the molded product is also increased. In addition, the temperature range of the twin screw extruder was found to be suitable for 220 to 280 ℃.

In particular, since the dispersibility in the resin is a very important factor when adding the alumina nanoparticles and the silane coupling agent, it is shown that the physical properties of the resin compound required in the present invention may be obtained only by optimizing the passing speed and temperature of the twin screw extruder.

In the present invention, the recycled PC / ABS resin preferably has a weight ratio (PC / ABS) of PC to ABS of 1.85 to 3.00. This is to secure weather resistance, rigidity, and moldability suitable for the use of automotive navigation covers, and it is found that weather resistance, rigidity, and moldability deteriorate when the content of the PC is too small or too large beyond the above range.

In addition, in order to control the physical properties of the PC / ABS when manufacturing the resin compound may be additionally mixed with a strength reinforcing additive when mixing the recycled PC / ABS, and the new PC / ABS resin may be further mixed.

It is possible to match the physical properties of the resin compound produced by such additional mixing, the new PC / ABS resin can be used any commercially available PC / ABS resin, and is added in order to achieve the required final physical properties are added to the physical properties. The amount of addition may vary.

As the strength reinforcing additive, it is preferable to use a silane coupling agent and alumina nanoparticles.

The silane coupling agent is used to improve the mechanical strength by improving the bonding strength of the PC and ABS, it is preferable to use 0.5 to 5 parts by weight based on 100 parts by weight of PC / ABS resin. If the content of the silane coupling agent outside the above range is too small, the mechanical strength of the resin compound cannot be improved, and if too large, process failure occurs in the extrusion process.

Examples of the silane coupling agent include 3-aminopropyltriethoxysilane, 3-aminopropyltrimethoxysilane, 3-aminopropylsilsesquioxane, benzylaminosilane, N-2- (aminoethyl) -3-aminopropyl Although aminosilanes, such as a trimethoxysilane and 3-mercaptopropyl trimethoxysilane, can be used, Especially 3-mercaptopropyl trimethoxysilane is preferable at the point of compatibility and process cost.

In addition, the aluminum nanoparticles are preferably alumina nanorods having a diameter of 200 to 500 nm and a width of 2 to 5 nm. This is selected to improve the dispersibility of the nanoparticles and the stiffness by mixing the nanoparticles, the nanoparticles that are too large diameter or width beyond the above range is shown to decrease the physical properties of the resin compound because the dispersibility is inferior It is preferable to use the nanoparticles in the above range because nanoparticles having too small diameter or width are difficult to handle and the unit cost of the raw material is too high and economical.

The alumina nanoparticles are preferably used in an amount of 1 to 10 parts by weight based on 100 parts by weight of the PC / ABS resin. If the content of the alumina nanoparticles is too small, the improvement of the rigidity due to the alumina nanoparticles cannot be expected. If the content of the alumina nanoparticles is too high, the compatibility with the silane coupling agent is poor and the dispersibility in the PC / ABS resin decreases, resulting in poor process. And deterioration of physical properties.

In addition, nanoclays, carbon nanotubes, silica nanoparticles and the like may be used instead of the alumina nanoparticles, but nanoparticles having a non-nanorod structure, such as nanoclays or silica nanoparticles, have poor compatibility with silane coupling agents, In the case of using carbon nanotubes, the compatibility with the silane coupling agent and the dispersibility in the resin were not high.

In order to confirm the effect of the production method according to the invention was prepared a resin compound with the composition shown in Table 1.

The PC / ABS resin mixture was passed through a twin screw extruder of L / D = 1/40, and the extrusion temperature was performed by setting the extrusion temperature to 230 ° C in the feeder part, 240 to 270 ° C in the cylinder part, and 280 ° C in the die part (nozzle).

In Table 1, the unit of the component is parts by weight, and carbon nanotubes were used by NANOCYL's NC7000, and alumina nanoparticles were refined by ARMSTEC's L100S to use a material whose diameter and width were within the scope of the present invention. As the silane coupling agent, 3-mercaptopropyltrimethoxysilane obtained from SIGMA-ALDRICH was used.

PC ABS PC / ABS Coupling agent Alumina Comparative Example 1 70 30 2.33 - - Comparative Example 2 70 30 2.33 2 - Comparative Example 3 70 30 2.33 2 12 Comparative Example 4 70 30 2.33 - 5 Example 1 70 30 2.33 One One Example 2 70 30 2.33 One 3 Example 3 70 30 2.33 One 5 Example 4 65 35 1.86 One 10 Example 5 72 28 2.57 One 3

The results of evaluating the tensile strength and impact strength for each prepared sample are shown in Table 2. Tensile strength was measured by Tinius Olsen's UTM (Universal Testing Machine) H25K-T model based on ASTM D638, and the impact strength (Izod Impact) was measured by the ASTM D256 method with Impact104 model of the same company.

The tensile strength
(MPa) Impact strength
(J / m) Comparative Example 1 39 421 Comparative Example 2 40 425 Comparative Example 3 38 415 Comparative Example 4 38 405 Example 1 52 525 Example 2 54 522 Example 3 59 537 Example 4 58 535 Example 5 59 528

Looking at the results of Table 2, the resin compound according to the present invention shows a better effect on the tensile strength and impact strength, these results are also closely related to the physical properties of the vehicle navigation cover molded using the resin compound It can be seen that.

In addition, the resin compound was prepared under the same conditions as in Example 1, but the resin compound prepared by applying carbon nanotubes (outer diameter of 10 to 20 nm, maximum inner diameter of 5 nm, length of 100 to 20,000 nm) instead of aluminum nanoparticles. The strength was 40 MPa and the impact strength was 422 J / m, indicating that the physical properties were inferior to the resin compound of the present invention. Therefore, it was confirmed that a better effect can be obtained when using aluminum nanoparticles.

The physical properties required for the resin compound to form the navigation cover are 50 to 55 MPa in tensile strength and 500 to 550 J / m in impact strength, and in Examples 1 to 5, these physical properties were found to satisfy the recycled PC / ABS of the present invention. It has been shown that resin compounds can be used to produce navigation cover products.

The results of various experiments on the cause of the improvement of physical properties when the alumina nanoparticles were added showed that not only the strength but also the crack resistance when dispersed in the PC / ABS resin. This is because the alumina nanoparticles consume more energy in the cracks. In addition, due to the thermal conductivity of the alumina itself, it has been found to achieve sufficient heat resistance in the molding process to enhance the strength of the molded article produced. The characteristics of the molded article when the alumina nanoparticles are applied do not appear in the silica having relatively low thermal conductivity, and similarly to the addition of carbon nanotubes, the addition of the silica nanoparticles indicates that the tensile strength and the impact strength are insufficient. .

Although the present invention has been described with reference to preferred embodiments, the present invention is not limited to the above embodiments, and various modifications may be made by those skilled in the art without departing from the spirit of the present invention. Changes are possible. Such modifications and variations are intended to fall within the scope of the invention and the appended claims.

Claims (5)

A method of manufacturing an automobile navigation cover comprising the step of molding a recycled PC / ABS (polycarbonate / acrylonitrile-butadiene-styrene) resin compound,
The recycled PC / ABS resin compound,
Mixing the recycled PC resin and the recycled ABS resin to produce a recycled PC / ABS resin;
Preparing a mixture by mixing a strength reinforcing additive with the recycled PC / ABS resin;
Extruding the mixture to prepare a resin compound;
Including;
The recycled PC / ABS resin has a weight ratio (PC / ABS) of PC to ABS of 1.85 to 3.00,
The strength reinforcing additive is a silane coupling agent and alumina nanoparticles,
The silane coupling agent uses 0.5 to 5 parts by weight based on 100 parts by weight of PC / ABS resin,
The alumina nanoparticles are used 1 to 10 parts by weight based on 100 parts by weight of PC / ABS resin,
The alumina nanoparticles are alumina nanorods (nano rod) having a diameter of 200 to 500nm and a width of 2 to 5nm (nano rod) manufacturing method of a car navigation cover using a recycled PC / ABS resin composition.
delete delete delete The method according to claim 1,
Method for producing a car navigation cover using a recycled PC / ABS resin composition, characterized in that the new PC / ABS resin is further mixed with the recycled PC / ABS resin.