KR20050113562A - Method of making vehicle body shell from the resin, and a vehicle body shell made from the method - Google Patents
Method of making vehicle body shell from the resin, and a vehicle body shell made from the method Download PDFInfo
- Publication number
- KR20050113562A KR20050113562A KR1020050101695A KR20050101695A KR20050113562A KR 20050113562 A KR20050113562 A KR 20050113562A KR 1020050101695 A KR1020050101695 A KR 1020050101695A KR 20050101695 A KR20050101695 A KR 20050101695A KR 20050113562 A KR20050113562 A KR 20050113562A
- Authority
- KR
- South Korea
- Prior art keywords
- vehicle body
- rotary molding
- body shell
- mold
- rotary
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/03—Injection moulding apparatus
- B29C45/04—Injection moulding apparatus using movable moulds or mould halves
- B29C45/06—Injection moulding apparatus using movable moulds or mould halves mounted on a turntable, i.e. on a rotating support having a rotating axis parallel to the mould opening, closing or clamping direction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/03—Injection moulding apparatus
- B29C45/04—Injection moulding apparatus using movable moulds or mould halves
- B29C45/06—Injection moulding apparatus using movable moulds or mould halves mounted on a turntable, i.e. on a rotating support having a rotating axis parallel to the mould opening, closing or clamping direction
- B29C2045/065—Injection moulding apparatus using movable moulds or mould halves mounted on a turntable, i.e. on a rotating support having a rotating axis parallel to the mould opening, closing or clamping direction continuously rotating turntables
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/04—Polymers of ethylene
- B29K2023/06—PE, i.e. polyethylene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/04—Polymers of ethylene
- B29K2023/08—Copolymers of ethylene
- B29K2023/083—EVA, i.e. ethylene vinyl acetate copolymer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2075/00—Use of PU, i.e. polyureas or polyurethanes or derivatives thereof, as moulding material
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Body Structure For Vehicles (AREA)
- Moulding By Coating Moulds (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
폴리에틸렌 60~80 wt%, 에틸렌비닐초산 코폴리머(EVA) 10~20 wt%, 폴리우레탄 10~20 wt%로 구성되는 수지조성물을 이용하여 자동차 차체의 외판을 로터리성형방식으로 제조하는 방법이 청구됨. 구체적으로 본 발명에 따른 방법은, 로터리성형기에 제조하려는 차체 외판의 금형을 장착하는 단계; 로터리성형기의 원료 용융로에 폴리에틸렌 60~80 wt%, 에틸렌비닐초산 코폴리머(EVA) 10~20 wt%, 폴리우레탄 10~20 wt%로 구성되는 수지조성물을 투입하여 용융시키는 단계; 로터리성형기의 회전원반을 회전시키면서 용융된 수지를 금형에 의해 사출성형시키면서 성형된 금형에는 냉각을 시켜 제품을 취출하는 로터리성형 단계로 구성된다.Claims are made for the method of manufacturing the exterior of an automobile body by a rotary molding method using a resin composition composed of 60 to 80 wt% polyethylene, 10 to 20 wt% ethylene vinyl acetate copolymer (EVA), and 10 to 20 wt% polyurethane. being. Specifically, the method according to the present invention comprises the steps of mounting a mold of the outer shell to be manufactured in a rotary molding machine; Adding a melt composition comprising 60 to 80 wt% polyethylene, 10 to 20 wt% ethylene vinyl acetate copolymer (EVA), and 10 to 20 wt% polyurethane to the raw material melting furnace of the rotary molding machine; The rotary mold of the rotary molding machine while rotating the molten resin by injection molding the mold is formed by a rotary molding step of cooling the product taken out.
Description
본 발명은 차체 외판을 제조하는 방법과, 이 방법에 의해 제조된 차체 외판에 관한 것으로서, 보다 구체적으로는, 기존의 자동차 차체 외판의 경량화를 위해 개발된 FRP의 원가가 높고 재활용이 불가능한 것을 해결하기 위하여, 재활용이 가능한 소재로 차체 외판을 제작함과 동시에 경량화 및 원가절감 효과를 얻을 수 있는 수지조성물을 원료로 차체 외판(특히, 자동차 펜더)을 제조하는 방법 및 이에 의해 제조된 차체 외판에 관한 것이다.The present invention relates to a method for manufacturing a vehicle body shell and a vehicle body shell manufactured by the method, more specifically, to solve the problem that the cost of the FRP developed for weight reduction of the existing automobile body shell is high and impossible to recycle. To this end, the present invention relates to a method for manufacturing a vehicle body shell (particularly an automobile fender) using a resin composition capable of producing a weight reduction and a cost reduction effect while manufacturing a vehicle body shell from a recyclable material, and a vehicle body shell manufactured thereby. .
보통, 자동차의 차체 외판은 철판으로 제작된다. 그러나 철판은 비싸고 무겁기 때문에 교환시 비용이 크고 외부 도장막 손상시 부식 등의 문제가 대두되었다. Usually, the body shell of an automobile is made of steel plates. However, since the steel plate is expensive and heavy, it is expensive to replace and problems such as corrosion when the external coating film is damaged.
이러한 문제를 개선하기 위하여 종래에도 자동차 외판을 합성수지로 제작하기 위한 시도가 있었다. 예를 들어, FRP(fiber reinforced polyester) 등의 열경화성 소재를 냉간프레스(cold press) 또는 핸드레이업(hand lay up) 방식으로 제작하여 차체 외판을 구성하는 시도를 들 수 있다. FRP가 적용된 예로는 국산 승용차 "엘란"의 차체 외판, 외국산 화물차의 휠측 펜더(휠 상부에 장착되어 휠하우스 역할을 겸비하는 펜더로 정의함) 등을 들 수 있다.In order to improve such a problem, there has been an attempt to manufacture a vehicle outer plate made of synthetic resin. For example, an attempt may be made to construct a vehicle body shell by manufacturing a thermosetting material such as fiber reinforced polyester (FRP) by a cold press or a hand lay up method. Examples of the application of the FRP include the outer shell of a domestic passenger car "Elan", the wheel side fender (defined as a fender mounted on the top of the wheel and having a role of a wheel house) of a foreign truck.
그러나, 종래에 FRP는 주로 무게를 줄이기 위한 목적으로 사용되는 것으로 가격은 철판보다도 더 비싸다. 따라서 원가절감 효과는 없다. 또한, FRP는 그 대부분을 차지하는 물질이 열경화성 수지인 폴리에스테르이므로 재활용이 불가능하다. 따라서, 정부의 관리하에 폐기를 해야 하는 관리대상물로 취급되고 있다. However, the conventional FRP is mainly used for the purpose of reducing weight, the price is more expensive than the iron plate. Therefore, there is no cost reduction effect. In addition, FRP can not be recycled because most of the material is a polyester that is a thermosetting resin. Therefore, it is treated as a management object to be disposed of under the control of the government.
이에 본 발명자는 재활용 가능한 합성수지로 자동차의 차체 외판을 제작하는 것을 시도하여 본 발명을 완성하였다. 본 발명에 있어서, 무엇보다 중요한 것은 기존 철판의 강성 수준과 같아야 하며, 이왕 합성수지로 할 경우 그 제조원가의 절감효과를 극대화해야 하는 것이 바람직하다. 이 과제를 해결하기 위하여, 본 발명에서는 종래의 FRP 소재의 강도 보다도 강성이 큰 수지조성물이 개시되고, 제조방법으로 로터리성형 방식을 이용하여 원가를 1/7 이하로 줄일 수 있다. The present inventors have completed the present invention by attempting to manufacture a vehicle body shell of a car with a recyclable synthetic resin. In the present invention, the most important thing should be the same as the level of rigidity of the existing steel sheet, it is desirable to maximize the savings of the manufacturing cost when used as a synthetic resin. In order to solve this problem, the present invention discloses a resin composition having a rigidity greater than that of a conventional FRP material, and the cost can be reduced to 1/7 or less by using a rotary molding method as a manufacturing method.
따라서, 본 발명의 목적은 자동차의 차체 외판을 재활용 가능한 합성수지로 제작하기 위한 수지조성물을 이용하여 차체 외판을 제작하는 방법 및 상기 수지조성물에 의한 제조방법을 통해 제조되는 차체 외판을 제공하는 것이다.Accordingly, an object of the present invention is to provide a vehicle body shell manufactured by a method of manufacturing a vehicle body shell using a resin composition for producing a vehicle body shell of a vehicle with a recyclable synthetic resin and a manufacturing method by the resin composition.
본 발명에 따른 차체 외판 제조방법을 설명하기 전에, 이 방법에 사용되는 차체 외판용 수지조성물에 대해서 먼저 설명한다. 이 수지조성물은 폴리에틸렌 60~80 wt%, 에틸렌비닐초산 코폴리머(EVA: Ethylene-Vinyl Acetate copolymer) 10~20 wt%, 폴리우레탄 10~20 wt%로 구성된다.Before explaining the method for manufacturing a vehicle body shell according to the present invention, the resin composition for a vehicle body shell used in this method will be described first. The resin composition is composed of 60 to 80 wt% polyethylene, 10 to 20 wt% ethylene vinyl acetate copolymer (EVA), and 10 to 20 wt% polyurethane.
상기 폴리에틸렌과 폴리우레탄은 주지되어 있는 수지이고, 상기 에틸렌비닐초산 코폴리머(PVA)는 에틸렌과 초산비닐의 공중합 수지로서 고무탄성과 뛰어난 저온특성을 갖는다. The polyethylene and the polyurethane are well known resins, and the ethylene vinyl acetate copolymer (PVA) is a copolymer resin of ethylene and vinyl acetate and has excellent elasticity in rubber and low temperature characteristics.
이렇게 구성되는 본 발명의 수지조성물에 의해 제작된 소재 및 종래의 FRP 소재의 특성을 시험한 결과는 각각 표1 및 표2와 같다. 표1과 표2는 한국화학시험연구원 토거재료센터에 의뢰하여 수행된 시험의 성적서를 근거로 하고 있다. 아래 표에서 볼 때에, 본 발명의 수지조성물에 의해 제조된 소재는 대부분의 항목에서 FRP 소재보다 작기는 하지만 거의 유사한 측정치를 얻었고, 인장강도면에서는 본 발명의 경우가 FRP보다 약 10% 더 큰 것으로 측정되었다. The results of testing the properties of the raw material and the conventional FRP material produced by the resin composition of the present invention configured as described above are shown in Table 1 and Table 2, respectively. Tables 1 and 2 are based on the test reports performed by the Korea Institute of Chemical Testing 'Toger Materials Center. In the table below, the material produced by the resin composition of the present invention obtained almost similar measurements, although smaller than the FRP material in most items, and in terms of tensile strength, the present invention is about 10% larger than the FRP. Was measured.
이상과 같은 수지조성물에 의해 제조되는 합성수지 소재는 FRP보다 그 조성 재료 자체가 저렴하지만, 본 출원인은 여기서 더 나아가 본 발명에 따른 수지조성물로 합성수지를 제조하는 원가를 더욱 낮추기 위하여 기존의 프레스 방식이나 핸드레이업 방식이 아닌 로터리성형 방식으로 자동차 외판을 제작하였다.Synthetic resin material produced by the resin composition as described above is cheaper than the composition material itself FRP, Applicant further goes here to reduce the cost of manufacturing the synthetic resin with the resin composition according to the present invention in the conventional press method or hand The outer shell of the car was manufactured by rotary molding instead of layup.
로터리성형 방식은 용융된 수지를 턴테이블에 놓고 턴테이블을 회전시킬 때 발생하는 원심력으로 용융수지를 턴테이블의 방사방향으로 쏠리도록 하여 턴테이블의 가장자리에 설치한 금형의 형상에 해당하는 제품을 성형하는 방식이다.The rotary molding method is a method of forming a product corresponding to the shape of a mold installed at the edge of the turntable by dissolving the melted resin in the radial direction of the turntable by centrifugal force generated when the molten resin is placed on the turntable and the turntable is rotated.
로터리성형이란 회전원반(turn table)에 다수개의 형체기구와 금형을 설치하여 원반의 회전에 따른 원심력에 의하여 사출성형을 수행함과 동시에 다른 금형의 냉각을 진행시켜서 성형품을 취출하고 다시 사출성형의 위치로 되돌려 사출을 하는사이클로 진행되는 성형방식이다. 이러한 로터리성형방식은 사출성형 사이클이 짧기 때문에 냉각시간이 긴 제품의 성형시에도 사출과 냉각이 동시에 이루어지므로 생산성을 향상시킬 수 있고 원가를 절감할 수 있다. 통상의 로터리성형기에 있어서는 ２개의 금형을 준비하여 회전원반상에 배치하여 차례로 사출을 하여 회전원반이 １회전할 시간과 성형사이클 시간을 맞추도록 하여 사용된다. 금형이 회전하는 방식과 실린더가 회전하는 방식 ２가지가 있다. 로터리성형기는 당업자에게 알려져있는 장치이기 때문에 구체적인 설명은 하지 않는다. Rotary molding means that a plurality of clamping mechanisms and molds are installed on a turntable to perform injection molding by centrifugal force according to the rotation of the disk, while cooling other molds to take out the molded product and return to the position of injection molding. It is a molding method that proceeds with a cycle of injection back. Since the rotary molding method has a short injection molding cycle, the injection and cooling are simultaneously performed even when molding a product having a long cooling time, thereby improving productivity and reducing costs. In a typical rotary molding machine, two molds are prepared and placed on a rotating disk to be ejected one by one to be used so that the rotating disk is rotated one time and the molding cycle time. There are two ways in which the mold rotates and the cylinder rotates. The rotary molding machine is a device known to those skilled in the art, and thus no specific explanation is given.
도1은 본 발명에 따른 수지조성물을 이용하여 자동차 차체 외판을 제작하는 방법을 나타내는 흐름도이다. 1 is a flowchart illustrating a method of manufacturing a vehicle body shell using a resin composition according to the present invention.
로터리성형기에 제조하려는 차체 외판의 금형을 장착한다. 물론 금형의 캐비티형상은 성형되는 차체 외판의 형상에 맞게 가공되어야 할 것이다. Install the mold of the outer shell of the body to be manufactured in the rotary molding machine. Of course, the cavity shape of the mold will have to be processed according to the shape of the outer shell to be molded.
다음에, 로터리성형기의 원료 용융로에 본 발명의 수지조성물을 투입하고 열을 가하여 용융시킨다. 용융온도는 약 250℃이다.Next, the resin composition of the present invention is added to a raw material melting furnace of a rotary molding machine, and heat is melted. The melting temperature is about 250 ° C.
로터리성형기의 회전원반을 회전시키면서 용융된 수지를 금형에 의해 사출성형시키면서 성형된 금형에는 냉각을 시켜 제품을 취출하는 로터리성형을 실시한다.While molding the molten resin with the mold while rotating the rotary disk of the rotary molding machine, the molded mold is cooled to perform rotary molding to take out the product.
이와 같은 로터리성형 방식에 의한 사출성형에 의해 본 발명에 따른 수지조성물을 이용한 차체 외판의 원가는 한층 절감될 수 있으며 생산성이 증가된다. 기존의 FRP소재는 열가소성이 아니기 때문에 로터리성형에 의하여 성형할 수 없고 냉간프레스나 핸드레이업 등으로 밖에 제작할 수 없었기 때문에 생산성이 높지 않았다. By injection molding by such a rotary molding method, the cost of the vehicle body shell using the resin composition according to the present invention can be further reduced and productivity is increased. Since the existing FRP material is not thermoplastic, it can not be molded by rotary molding and can only be manufactured by cold press or hand layup.
도2a 및 도2b는 본 발명에 따른 수지조성물 및 상기 로터리성형 방법으로 제작된 차체 외판 부품 중 화물차에 사용되는 휠측 펜더의 외관을 촬영한 사진이다. 이 펜더는 화물차의 휠 상부에 설치되어 휠하우스의 역할을 하고 있는 펜더이다. 도2a,b에 나타낸 제품은 그 굴곡 형상으로 볼 때 특히 로터리성형에 적합한 형상으로서 더더욱 생산성이 좋아질 수 있다. 그러나, 이들 형태 이외에도 차종별로 다양한 형태의 차체 외판 외관 부품을 로터리방식으로 성형할 수 있음은 당업자에게 자명하다.Figure 2a and Figure 2b is a photograph of the appearance of the wheel-side fender used for the truck of the resin composition according to the present invention and the outer shell parts manufactured by the rotary molding method. This fender is a fender installed on top of a wheel of a van and acts as a wheelhouse. The products shown in Figs. 2a and 2b can be more productive, especially when viewed in their curved shape, as shapes suitable for rotary molding. However, it will be apparent to those skilled in the art that in addition to these forms, various types of vehicle body exterior plate exterior parts can be molded by a rotary method.
이상에서와 같이 본 발명의 수지조성물로 제작된 자동차 차체 외판은, 기존의 FRP 소재보다도 오히려 강도가 강하면서도 원가가 낮으며 기존의 철판보다 가볍고 내부식성이 강한 장점을 갖게 된다. 본 발명은 모든 종류의 자동차 차체 외판 부품에 적용가능하며, 특히 로터리성형 방식에 적합한 화물차용 휠측 펜더에 가장 적용성이 우수하다. As described above, the outer shell of the automobile body made of the resin composition of the present invention has a strong strength, low cost, and lighter corrosion resistance than the existing iron plate, rather than the existing FRP material. The present invention is applicable to all kinds of vehicle body shell parts, and is particularly applicable to wheel side fenders for trucks suitable for rotary molding.
화물차용 휠측 펜더의 예를 들 때, 기존의 FRP 소재를 사용한 펜더의 경우에는 그 가격이 500,000원 정도가 되고 수입에 의존하고 있었지만, 본 발명에 따른 수지조성물을 이용하여 로터리성형에 의해 제작할 경우에는 70,000원 정도로 가격이 산출되기 때문에, 기존의 FRP에 비해 약 1/7 이하로 가격이 저렴해진다. 또한, 정부에서는 자동차 차체 용도로 FRP의 사용을 금지하는 법안을 마련 중에 있기 때문에 본 발명에 따른 새로운 조성물에 의하여 제조된 차체 외판은 그 효용성이 배가될 것이다. In the case of the wheel-side fender for trucks, the price of the fender using the conventional FRP material is about 500,000 won and depends on the import, but when manufacturing by rotary molding using the resin composition according to the present invention, Since the price is calculated at about 70,000 won, the price is lower than about 1/7 of the existing FRP. In addition, since the government is preparing a bill to prohibit the use of FRP for automobile body use, the body shell produced by the new composition according to the present invention will double its utility.
도1은 본 발명에 따른 차체 외판을 제조하는 방법의 흐름도.1 is a flow chart of a method of manufacturing a vehicle body shell according to the present invention.
도2a는 본 발명에 따른 방법으로 제조된 화물차용 휠측 펜더의 외관 사진.Figure 2a is a photograph of the appearance of the wheel side fender for a van produced by the method according to the present invention.
도2b는 도2a와 다른 형태의 펜더의 외관 사진.Figure 2b is a photograph of the appearance of the fender of the different form from Figure 2a.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020050101695A KR100601104B1 (en) | 2005-10-27 | 2005-10-27 | Method of making vehicle body shell from the resin, and a vehicle body shell made from the method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020050101695A KR100601104B1 (en) | 2005-10-27 | 2005-10-27 | Method of making vehicle body shell from the resin, and a vehicle body shell made from the method |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020030062123A Division KR20050024892A (en) | 2003-09-05 | 2003-09-05 | Composition-of-matter of resin for vehicle body shell, a method of making vehicle body shell from the resin, and a vehicle body shell made from the method and the resin |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR20050113562A true KR20050113562A (en) | 2005-12-02 |
| KR100601104B1 KR100601104B1 (en) | 2006-07-19 |
Family
ID=37288146
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020050101695A KR100601104B1 (en) | 2005-10-27 | 2005-10-27 | Method of making vehicle body shell from the resin, and a vehicle body shell made from the method |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR100601104B1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20190010945A (en) | 2017-07-24 | 2019-02-01 | 현대자동차주식회사 | Yellow color paint composition |
-
2005
- 2005-10-27 KR KR1020050101695A patent/KR100601104B1/en not_active IP Right Cessation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20190010945A (en) | 2017-07-24 | 2019-02-01 | 현대자동차주식회사 | Yellow color paint composition |
Also Published As
| Publication number | Publication date |
|---|---|
| KR100601104B1 (en) | 2006-07-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8367753B2 (en) | Polypropylene resin composition for creating fabric texture | |
| EP2562220B1 (en) | Thermoplastic moulded substances with increased hydrolysis resistance | |
| US9175157B2 (en) | Composition of polypropylene having improved tactility and scratch resistance and methods of use thereof | |
| KR20120058347A (en) | Thermo plastic complex for stiffener and Preparing method thereof | |
| CN102532701A (en) | Low-warp creep-resistant polypropylene composite as well as preparation method and application thereof | |
| EP2644350A2 (en) | Production method for a splash shield using a continuous extrusion-injection-foaming moulding process | |
| KR100292210B1 (en) | Polypropylene molding composition for making moldings having a decorative surface | |
| CN107337841B (en) | Composition of polypropylene having excellent touch and dimensional stability | |
| CN105647029A (en) | Polypropylene material for baby carriage main beam and preparing method thereof | |
| KR100601104B1 (en) | Method of making vehicle body shell from the resin, and a vehicle body shell made from the method | |
| CN104893106A (en) | High-impact-resistant polypropylene composite material for bumpers of automobiles and method for manufacturing polypropylene composite material | |
| KR930002068B1 (en) | Injection molded article | |
| KR20050024892A (en) | Composition-of-matter of resin for vehicle body shell, a method of making vehicle body shell from the resin, and a vehicle body shell made from the method and the resin | |
| CN114539678B (en) | Energy-saving regenerated polypropylene composite material and preparation method thereof | |
| KR20120005254A (en) | Preparing method of recycled polyamide66 resin | |
| CN108707279A (en) | A kind of eutectic lapping defect exempts from spray coating polypropylene composite material and preparation method without current mark | |
| KR101860629B1 (en) | Polyolefin, preparing method thereof, and rear bumper beam for vehicles using the same | |
| CN110564097B (en) | Reinforced SMA composite material with low warpage and high dimensional stability for automobile structural member and preparation method thereof | |
| KR102690844B1 (en) | Recycled polyamide resin composition, molded article comprising same and manufacturing method for same | |
| CN107353511A (en) | A kind of Automotive interior product and preparation method thereof | |
| CN107541040A (en) | PC/ABS/PPET copolyester alloy and preparation method thereof | |
| KR20170025664A (en) | Recycled polyamide resin composition and and molded article thereof | |
| US6800685B1 (en) | Polyester resin composition for engine peripheral parts | |
| CN104558843A (en) | Low-warpage high-modulus modified polypropylene material and preparation method thereof | |
| KR20110101105A (en) | Low pressure injection molding method using recycled pet for package tray of vehicle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A107 | Divisional application of patent | ||
| A201 | Request for examination | ||
| E902 | Notification of reason for refusal | ||
| E701 | Decision to grant or registration of patent right | ||
| GRNT | Written decision to grant | ||
| FPAY | Annual fee payment |
Payment date: 20090708 Year of fee payment: 4 |
|
| LAPS | Lapse due to unpaid annual fee |