KR20170070732A - A long fiber reinforced polypropylene resin composition - Google Patents
A long fiber reinforced polypropylene resin composition Download PDFInfo
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- KR20170070732A KR20170070732A KR1020150178619A KR20150178619A KR20170070732A KR 20170070732 A KR20170070732 A KR 20170070732A KR 1020150178619 A KR1020150178619 A KR 1020150178619A KR 20150178619 A KR20150178619 A KR 20150178619A KR 20170070732 A KR20170070732 A KR 20170070732A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/02—Fibres or whiskers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2555/00—Characteristics of bituminous mixtures
- C08L2555/30—Environmental or health characteristics, e.g. energy consumption, recycling or safety issues
- C08L2555/34—Recycled or waste materials, e.g. reclaimed bitumen, asphalt, roads or pathways, recycled roof coverings or shingles, recycled aggregate, recycled tires, crumb rubber, glass or cullet, fly or fuel ash, or slag
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- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
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- Engineering & Computer Science (AREA)
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- Compositions Of Macromolecular Compounds (AREA)
Abstract
The present invention relates to a resin composition capable of drastically reducing costs including recycled polypropylene recovered from parts of a waste automobile.
More specifically, the present invention relates to a resin composition capable of reducing costs without deteriorating the quality of a product because it has the same or higher strength and thermal stability as compared with conventional resin compositions using a composite material obtained by mixing recycled polypropylene with new polypropylene will be.
Description
The present invention relates to a resin composition capable of drastically reducing costs including recycled polypropylene recovered from parts of a waste automobile.
The European Union's Waste Vehicle Directive (2000/53 / EC) and the Korean Resource Circulation Act require the recycling / recall rate of 95% for new vehicles launched from 2015, the recycling rate for recycled vehicles to be 95 % Of the total.
Failure to comply with the above requirements will result in disadvantages, such as restrictions on the sale of new cars and the payment of annual wastes contributions.
In other words, automobile producers can not but pay more attention to the recovery and disposal of scrap cars.
Approximately 250kg (medium-sized car) plastic is used in one car. About 40% by weight of polypropylene, about 10% by weight of polyamide, about 9% by weight of polyurethane, about 7% by weight of polyethylene, about 4% by weight of acrylonitrile-butadiene-styrene ) Resin accounts for about 5% by weight, and the other plastic accounts for 29% by weight.
And a technique for reusing polypropylene, polyamide, and polyurethane, which occupy a high proportion of them, as materials for automobiles has been actively developed.
In order to use the resin composition for automobile parts, properties such as high rigidity and thermal stability must be excellent. Accordingly, the resin composition is mainly reinforced with fibers, and Korean Patent Laid-Open No. 10-2008-0061077 discloses a fiber-reinforced polypropylene resin composition containing inorganic fibers.
However, since the above conventional resin composition is based on a novel polyolefin resin, it can not be applied directly to the recycled polyolefin resin composition. The recycled polyolefin resin contains a certain amount of an inorganic material (impurity) in its recovery process, and some molecular structure may be denatured.
Therefore, it is important to develop a resin composition which does not change the physical properties even when the recycled polyolefin resin is used.
SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems and limitations, and has the following objectives.
It is an object of the present invention to provide a long fiber-reinforced polypropylene resin composition having a strength and thermal stability equal to or higher than that of a conventional resin composition by using a certain amount of recycled polypropylene.
Another object of the present invention is to provide a long fiber-reinforced polypropylene resin composition which can reduce cost by using a mixture of a new polypropylene and a recycled polypropylene.
It is another object of the present invention to provide a long fiber-reinforced polypropylene resin composition which can realize excellent physical properties even when a small amount of fibers are used by reinforcing the resin composition with long fibers to lighten the parts.
The object of the present invention is not limited to the above-mentioned object. The objects of the present invention will become more apparent from the following description, which will be realized by means of the appended claims and their combinations.
In order to achieve the above object, the present invention can include the following configuration.
The long fiber-reinforced polypropylene resin composition according to the present invention may contain 40 to 50% by weight of recycled polypropylene, 25 to 35% by weight of new polypropylene and 20 to 25% by weight of long fiber .
In a preferred embodiment of the present invention, the recycled polypropylene may be recovered from a battery tray, an air cleaner housing, or a rear bumper back-beam, have.
In a preferred embodiment of the present invention, the recycled polypropylene may have an inorganic content of greater than 0 wt% to less than 10 wt%.
In a preferred embodiment of the present invention, the new polypropylene may have a melt index of 100 to 500 g / 10 min (ASTM D1238, 230 DEG C).
In a preferred embodiment of the present invention, the novel polypropylene has a melt flow rate of 13 g / 10 min (ASTM D1238, 230 DEG C) and a high flow polypropylene having a melt index of 1,300 to 1,400 g / 230 DEG C).
In a preferred embodiment of the present invention, the long fibers are selected from natural fibers, glass fibers, carbon fibers, metal fibers, aramid fibers, polyethylene fibers, polyacrylonitrile fibers, arylate fibers, polyetherketone fibers, Or any combination thereof.
In a preferred embodiment of the present invention, the long fibers may be impregnated with a composite material in which recycled polypropylene and new polypropylene are melt-mixed.
In a preferred embodiment of the present invention, the long fibers may have a length of 5 to 30 mm.
The long fiber-reinforced polypropylene resin composition according to the present invention can be suitably used as an inorganic filler, a lubricant, an antioxidant, a light stabilizer, a hydrolysis stabilizer, a releasing agent, a pigment, an antistatic agent, a conductivity imparting agent, A friction agent, an anti-wear agent, and a coupling agent, or a mixture thereof.
The long fiber reinforced polypropylene resin composition according to the present invention may contain the additive in an amount of 0.1 to 5 parts by weight based on 100 parts by weight of the resin composition composed of recycled polypropylene, new polypropylene and long fiber.
In a preferred embodiment of the present invention, the inorganic filler is selected from the group consisting of Talc, Mica, Calcium carbonate, Glass bead, Glass flake, Glass fiber chop, glass fiber powder and wollastonite, or a mixture thereof.
The present invention may be a molded article molded from the long fiber-reinforced polypropylene resin composition.
In a preferred embodiment of the present invention, the molded article may be an injection molded article.
In a preferred embodiment of the present invention, the molded article is a product used for an interior and exterior material of a vehicle, and may preferably be a battery tray.
The present invention includes the above-described configuration, and thus has the following effects.
The long fiber-reinforced polypropylene resin composition according to the present invention uses a composite material in which recycled polypropylene is mixed with a new polypropylene. Therefore, cost can be reduced in manufacturing parts using the same.
In addition, the long fiber-reinforced polypropylene resin composition according to the present invention has the same or higher strength and thermal stability as compared with the conventional resin composition, so the cost can be reduced without deteriorating the quality of the product.
In addition, the long fiber-reinforced polypropylene resin composition according to the present invention can reduce the weight of parts manufactured using the fiber because the amount of fibers used is small.
The effects of the present invention are not limited to the effects mentioned above. It should be understood that the effects of the present invention include all reasonably possible effects in the following description.
Hereinafter, the present invention will be described in detail by way of examples. The embodiments of the present invention can be modified into various forms as long as the gist of the invention is not changed. However, the scope of the present invention is not limited to the following embodiments.
If it is determined that the gist of the present invention may be blurred, the description of the composition and function of the princess will be omitted.
Also, "comprising" in this specification means that it may further include other elements unless otherwise specified.
The long fiber-reinforced polypropylene resin composition (hereinafter referred to as "resin composition") according to the present invention may include recycled polypropylene, new polypropylene, and long fiber.
Specifically, it may be a resin composition impregnated with the long fibers in a composite material obtained by melt-mixing the recycled polypropylene and new polypropylene.
In the present specification, the term "new polypropylene" refers to polypropylene that has never been made into a product through a process such as molding. Also, the term "recycled polypropylene" refers to polypropylene that has been made into one or more products and recovered from the product in any manner.
The recycled polypropylene is not limited to those recovered from a particular product, but is preferably a battery tray, an air cleaner housing, a rear bumper back-beam, It may have been recovered. This is because parts of automobiles contain a lot of polypropylene as described above.
The method for recovering the recycled polypropylene is not particularly limited. Preferably, the recycled polypropylene is recovered by dismantling components such as a battery tray from a waste automobile, pulverizing and cleaning the waste, and then carrying out a re-compounding process have.
The conventional polypropylene resin composition uses only new polypropylene, but the resin composition according to the present invention is characterized by using recycled polypropylene instead of the new polypropylene content. At this time, the content thereof should be appropriate so that physical properties equivalent to or better than those of the conventional polypropylene resin composition can be expressed, and a detailed description thereof will be described later.
The recycled polypropylene may not be completely separated from the inorganic materials used in the process of recovering the recycled polypropylene. Since the inorganic material may act as a kind of impurity, it may be desirable to adjust the content to less than 10 wt% for the quality of the final product. If the content of the inorganic material is 10% by weight or more, then the processability of the resin composition may be significantly deteriorated.
The new polypropylene may have a melt index (Melt Index) of from 100 to 500 g / 10 min under a load condition of 230 DEG C, 2.16 kg (ASTM D1238, 230 DEG C). If it is less than 100 g / 10 min, impregnation of the long fibers may be deteriorated. If it is more than 500 g / 10 minutes, the flowability of the resin composition may be excessively increased and the mechanical properties such as the strength of the final product may be deteriorated.
The new polypropylene may be a mixture of high melt flow polypropylene and high crystalline polypropylene.
The highly flowable polypropylene may be polypropylene having a melt index of 1,300 to 1,400 g / 10 minutes (ASTM D1238, 230 DEG C). The highly crystalline polypropylene may also be a polypropylene having a melt index of 13 g / 10 min (ASTM D1238, 230 DEG C).
Specifically, the high-molecular polypropylene and the highly crystalline polypropylene may be mixed to prepare a new polypropylene having a melt index of 100 to 500 g / 10 minutes. As a result, the fluidity for facilitating the processing of the resin composition can be satisfied and the mechanical properties such as the strength of the resin composition can be improved.
The resin composition may contain 40 to 50% by weight of the recycled polypropylene and 25 to 35% by weight of the new polypropylene. If the content of the new polypropylene is reduced and the content of the recycled polypropylene is increased, the mechanical properties of the resin composition may be deteriorated. On the other hand, if the content of the new polypropylene is increased and the content of the recycled polypropylene is reduced, the effect of cost reduction may be insignificant.
Therefore, the content of the recycled polypropylene and the new polypropylene should fall within the above-mentioned numerical range, so that the effect of cost reduction can be sufficiently satisfied while satisfying mechanical properties such as strength and thermal stability equal to or more than those of the prior art.
The long fiber is a structure for improving the mechanical properties of the resin composition. It is possible to select a suitable material according to the use of the final product, but it is preferable to use a material such as natural fiber, glass fiber, carbon fiber, metal fiber, aramid fiber, polyethylene fiber, polyacrylonitrile (PAN) A polyether ether ketone (PEEK) fiber, and a rayon fiber, or a mixture thereof may be used. More preferably, natural fibers can be used, which is an environmentally friendly material.
The long fibers may have a length of 5 to 30 mm, preferably 10 to 25 mm, more preferably 15 to 20 mm. If it is less than 5 mm, the degree of improvement of the mechanical properties of the resin composition may not be sufficient. If it is more than 30 mm, the fluidity of the resin composition may be lowered and the subsequent molding may be difficult.
The long fibers may be impregnated into a composite material obtained by melt-mixing the reclaimed polypropylene and the new polypropylene as described above. Although impregnation of the long fibers is not performed by a specific process, it is preferable that the composite material is impregnated by pulling or squeezing when preparing the composite material by pultrusion.
The resin composition may contain 20 to 25% by weight of the long fibers. If the amount is less than 20% by weight, the effect of improving the mechanical properties of the resin composition may be insignificant. If the amount is more than 25% by weight, long fibers may be led to the surface of the final product to deteriorate the quality, It can get worse.
The resin composition may further include additives in an amount of 0.1 to 5 parts by weight based on 100 parts by weight of the composition composed of the recycled polypropylene, the new polypropylene and the long fiber.
The additive may be any of an inorganic filler, a lubricant, an antioxidant, a light stabilizer, a hydrolytic stabilizer, a releasing agent, a pigment, an antistatic agent, a conductivity imparting agent, a magnetic agent, a crosslinking agent, an antibacterial agent, a processing aid, One or a mixture thereof.
The inorganic filler enhances the workability when molding the resin composition and improves the mechanical properties such as strength and the like, so that the amount of the long fibers can be further reduced and the cost can be reduced. Preferred are talc, Mica, calcium carbonate, glass beads, glass flake, glass fiber chop, glass fiber powder, ) And wollastonite, or a mixture thereof may be used.
The coupling agent is a constituent for improving the binding force between the recycled polypropylene and the new polypropylene and the long fiber. Preferably, an olefin-based polymer resin in which maleic anhydride is grafted or an olefin-based copolymer in which maleic anhydride is grafted can be used.
The lubricant, the antioxidant, the light stabilizer, the hydrolytic stabilizer, the releasing agent and the like are generally added to improve the functionality of the resin composition, and therefore, a detailed description thereof will be omitted.
Hereinafter, the present invention will be described in more detail with reference to experimental examples. However, these examples are for illustrating the present invention and the scope of the present invention is not limited thereto.
Examples 1 to 3 and Comparative Examples 1 to 6
A long fiber reinforced polypropylene resin composition was prepared by the composition and content shown in Table 1 below.
The preparation process is briefly described as follows.
Recycled polypropylene and new polypropylene were fed into the pouring section of the pultrusion equipment in the contents of Table 1. At this time, the new polypropylene was obtained by mixing a high-flow polypropylene having a melt index of 1,300 g / 10 min and a high-crystallinity polypropylene having a melt index of 13 g / 10 min.
Then, when the composition passed through the dies, the long fiber was impregnated by a pulling and squeezing process to obtain a long fiber reinforced polypropylene resin composition. At this time, the long fiber was a long glass fiber having a diameter of 17 탆 and a length of 15 mm.
The resin composition prepared as described above was extracted with a strand of continuous phase, cooled and cut into pellets.
The pellets were dried by hot air at 80 to 100 ° C for 4 hours. The specimens were then injection molded at a cylinder temperature of 200-230 ° C and a mold temperature of 50 ° C.
[weight%]
[weight%]
[weight%]
Experimental Example
The specific gravity, strength and heat deflection temperature of the specimens according to Examples 1 to 3 and Comparative Examples 1 to 6 were measured. The measurement method is as follows.
(1) Specific gravity: According to ASTM D792 (room temperature)
(2) Tensile strength: According to ASTM D638 (Cross head: 5 mm / min)
(3) Flexural strength: According to ASTM D790 (Cross head: 2 mm / min)
(4) Impact strength: According to ASTM D256 (1/4 inch, notched Izod (room temperature))
(5) Heat Distortion Temperature (HDT): According to ASTM D648 (load 18.6 kgf / cm 2 )
The results are shown in Table 2 below. The item of cost reduction was evaluated in consideration of the content and price of recycled polypropylene and new polypropylene, content of long fiber, and price. In comparison with the specimen of Comparative Example 1, ⊚ was good, ◯ was good, ×.
[MPa]
[MPa]
[J / m, 23 < 0 > C]
[° C]
With reference to Table 2, the specimens of Examples 1 to 3 according to the present invention had the same mechanical properties as specific gravity, tensile strength, flexural strength, impact strength, and heat distortion temperature of the specimen of Comparative Example 1 composed of the new polypropylene Or more.
Therefore, since the resin composition according to the present invention has recycled polypropylene which is equal to or higher than that of the conventional composition, the cost of the product can be drastically reduced.
Also, comparing the specimens of Examples 1 to 3 and the specimen of Comparative Example 2 composed of recycled polypropylene alone, it can be understood that the product can not satisfy the desired mechanical properties when only recycled polypropylene is used.
Comparing the specimens of Examples 1 to 3 with the specimens of Comparative Example 3 and Comparative Example 4, it is found that the strength and heat distortion temperature of the resin composition are lowered when the content of the long fibers is less than 20% by weight.
Comparing the specimens of Examples 1 to 3 with the specimens of Comparative Example 5 and Comparative Example 6, the content of the recycled polypropylene and the new polypropylene should fall within the numerical range according to the present invention so that the product achieves the desired degree of mechanical properties .
Claims (14)
25 to 35% by weight of a new polypropylene; And
And 20 to 25% by weight of long fibers.
Wherein the recycled polypropylene is recovered from a battery tray, an air cleaner housing or a rear bumper back-beam, which are parts of a waste automobile.
Wherein the recycled polypropylene has an inorganic content of greater than 0 wt% to less than 10 wt%.
Wherein the new polypropylene has a melt index of 100 to 500 g / 10 min (ASTM D1238, 230 DEG C).
The new polypropylene
High flow polypropylene having a melt index of 1,300 to 1,400 g / 10 min (ASTM D1238, 230 DEG C)
And a high crystallinity polypropylene having a melt index of 13 g / 10 min (ASTM D1238, 230 DEG C).
Wherein the long fiber is one of natural fiber, glass fiber, carbon fiber, metal fiber, aramid fiber, polyethylene fiber, polyacrylonitrile fiber, arylate fiber, polyetherketone fiber and rayon fiber or a mixture thereof Fiber reinforced polypropylene resin composition.
Wherein the long fibers are impregnated in a composite material in which recycled polypropylene and new polypropylene are melt-mixed.
Wherein the long fibers are 5 to 30 mm in length.
A lubricant, an antioxidant, a light stabilizer, a hydrolysis stabilizer, a releasing agent, a pigment, an antistatic agent, a conductivity imparting agent, a magnetic agent, a crosslinking agent, an antibacterial agent, a processing aid, By weight based on the total weight of the polypropylene resin composition.
With respect to 100 parts by weight of the resin composition composed of recycled polypropylene, new polypropylene and long fiber,
0.1 to 5 parts by weight of a polypropylene resin composition.
The inorganic filler may be selected from the group consisting of Talc, Mica, Calcium carbonate, Glass bead, Glass flake, Glass fiber chop, Glass fiber powder and wollastonite, or a mixture thereof. The long-fiber-reinforced polypropylene resin composition according to claim 1,
Wherein the molded article is an injection molded article.
Wherein the molded article is a battery tray of an automobile.
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| Application Number | Priority Date | Filing Date | Title |
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| KR1020150178619A KR20170070732A (en) | 2015-12-14 | 2015-12-14 | A long fiber reinforced polypropylene resin composition |
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| KR1020150178619A KR20170070732A (en) | 2015-12-14 | 2015-12-14 | A long fiber reinforced polypropylene resin composition |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20190064875A (en) | 2017-12-01 | 2019-06-11 | 주식회사 엘지화학 | Glass fiber reinforced polypropylene resin composition, method for preparing the resin composition and molded article comprising the same |
| CN115011030A (en) * | 2022-05-20 | 2022-09-06 | 南京金杉汽车工程塑料有限责任公司 | Preparation method for preparing high-performance polypropylene modified material by utilizing reclaimed material |
| CN115895110A (en) * | 2022-11-09 | 2023-04-04 | 金发科技股份有限公司 | Polypropylene composition and preparation method and application thereof |
| WO2023234542A1 (en) * | 2022-05-30 | 2023-12-07 | 삼성전자주식회사 | Inorganic non-reinforced polypropylene resin composition using recycled resin and washing machine using same |
-
2015
- 2015-12-14 KR KR1020150178619A patent/KR20170070732A/en not_active Application Discontinuation
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20190064875A (en) | 2017-12-01 | 2019-06-11 | 주식회사 엘지화학 | Glass fiber reinforced polypropylene resin composition, method for preparing the resin composition and molded article comprising the same |
| CN115011030A (en) * | 2022-05-20 | 2022-09-06 | 南京金杉汽车工程塑料有限责任公司 | Preparation method for preparing high-performance polypropylene modified material by utilizing reclaimed material |
| WO2023234542A1 (en) * | 2022-05-30 | 2023-12-07 | 삼성전자주식회사 | Inorganic non-reinforced polypropylene resin composition using recycled resin and washing machine using same |
| CN115895110A (en) * | 2022-11-09 | 2023-04-04 | 金发科技股份有限公司 | Polypropylene composition and preparation method and application thereof |
| CN115895110B (en) * | 2022-11-09 | 2023-09-12 | 金发科技股份有限公司 | Polypropylene composition and preparation method and application thereof |
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