Abstract:
본 발명은 반응압출법에 의한 점토 분산 폴리올레핀 나노복합재의 제조방법과 이로부터 제조된 나노복합재에 관한 것으로서, 더욱 상세하게는 유기점토, 고분자량의 폴리올레핀수지, 무수말레인산(Maleic anhydride) 또는 비닐옥사졸린 (vinyl oxazoline)의 관능성 단량체 및 라디칼 개시제를 반응압출하여 복합재료를 제조하고, 상기에서 제조된 복합재료와 고분자량의 폴리올레핀수지를 반응압출하는 2단계 공정으로 나노복합재를 제조하여 유기점토의 분산성이 월등하게 개선되고, 열적 및 기계적 물성이 향상된 점토 분산 폴리올레핀 나노복합재의 제조방법과 이로부터 제조된 나노복합재에 관한 것이다. 폴리올레핀수지, 무수말레인산, 비닐옥사졸린, 라디칼 개시제, 나노복합재
Abstract:
본 발명은 저압성형 열경화성 수지조성물에 관한 것으로서, 더욱 상세하게는 수지의 증점(Thickening)을 위해 종래의 수지조성에서 증점제 및 저수축제 대신 결정성 포화 폴리에스테르를 포함시키거나, 또는 종래의 수지조성에 결정성 포화 폴리에스테르 수지 또는 결정성 불포화 폴리에스테르 수지를 추가적으로 포함시킨 저압성형 열경화성 수지조성물에 관한 것이다. 따라서, 이러한 본 발명에 따른 수지조성물은 20㎏f/㎠이하의 성형압력에서도 제품의 유동성이 양호하여 가공성이 우수할 뿐만 아니라, 원재료가 플라스틱 수지로서 저장안정성 및 경량화는 물론 플라스틱이 가지는 뛰어난 내부식성, 그리고 내충격성 및 내덴트(Dent)성이 우수하여 부품일체화에 따른 원가절감 효과도 기대할 수 있다.
Abstract:
본 발명은 유리섬유 보강 열경화성 복합재료의 제조방법에 관한 것으로서, 자동차의 차체 외판용 열경화성 수지 조성물을 종래 핸드 레이업(Hand Lay-Up) 제조공정을 통해 성형하였으나, 균일한 품질의 미확보와 변색의 문제가 있어 이를 배제하고, 대신에 저압 성형 SMC 제조공정을 이용하는 한편, 강도(strength)문제를 개선하기 위해 직조된 유리섬유 보강재를 적용하여 성형함으로써, 성형품의 강성 및 강도를 동시에 향상시킬 수 있을 뿐만 아니라, 내열성, 내수성 및 치수 안정성을 더욱 개선시킬 수 있는 유리섬유 보강 열경화성 복합재료의 제조방법에 관한 것이다.
Abstract:
본 발명은 저비중 열경화성 복합재료 조성물의 제조방법에 관한 것으로서, 더욱 상세하게는 자동차의 차체 외판용 열경화성 수지 조성물 중에 종래 무기충전제의 일부를 저비중 충전제로 대체하고 사용하는 충전제의 형태 및 증점제를 달리하여 자동차 플라스틱 차체외판에 적용시 경량화의 효과와 일반적인 성형압력에서 발생할 수 있는 저비중 충전제의 파괴(brake-up) 가능성을 방지하여 프레스 성형시 낮은 압력으로도 우수한 성형성을 갖는 비중이 낮고 기계적 물성이 우수한 고유동성의 저비중 열경화성 복합재료 조성물의 제조방법에 관한 것이다.
Abstract:
PURPOSE: A thermosetting resin composition for a car body external plate is provided which is excellent in mechanical and physical properties and surface external appearance. CONSTITUTION: The thermosetting resin composition comprises: (i) 5-30 part by weight of an unsaturated polyester resin; (ii) 20-35 part by weight of a glass fiber tempering materials; (iii) 30-60 part by weight of a filler; (iv) 1-20 part by weight of a low contracting agent; (v) 0.01-2 part by weight of a hardening initiator; (vi) 0.1-5 part by weight of a releasing agent; (vii) 0.05-10 part by weight of a thickening agent; and (viii) 0.05-5 part by weight of at least one component selected from the group consisting of a paint, a heat-stabilizer, an ultraviolet stabilizer and a polymerization inhibitor.
Abstract:
PROBLEM TO BE SOLVED: To produce a thermosetting resin for a car fender having excellent physical properties as compared with a conventional one not only to be made easy in the alteration to planning but also to be improved from an aspect of cost reduction and effectively adaptable to a small quantity of a mass-produced car model as a special purpose of an electric car or the like. SOLUTION: In a method for producing a thermosetting resin for a car fender containing an unsaturated polyester resin as a fundamental resin and a glass or carbon fiber as a reinforcing material, the gel coating of the fundamental resin is applied to molds 1-3 produced from three end pieces and the reinforcing material comprising the glass or carbon fiber is laminated on the surface of the gel coating layer by a hand lay up method so as to be contained in the fundamental resin in an amt. of 20-60 wt.%.
Abstract:
PURPOSE: A method for manufacturing regenerated materials of a plastic inhalation manifold is provided to improve a shock strength of the regenerated material and to compensate the thermal decomposition of plastic resins. CONSTITUTION: The method for manufacturing regenerated materials of a plastic inhalation manifold comprises the steps of; crushing waste plastic inhalation manifold into a particle size of 5-20 mm with a low speed crusher after removing different kinds of materials from it; repeatedly crushing the manifold pieces into a size of 1-4 mm with a high speed crusher; adding diglycidyl ether of bisphenol A or 1,4-phenylene bis(2-oxazoline) into the crushed materials itself or resin mixed materials to obtain a mixture; and performing an extrusion and injection molding to complete pellet shaped regenerated materials.
Abstract:
PURPOSE: A method for manufacturing a plastic tailgate panel assembly for a car is provided to obtain a physical value lighter than steel plate and similar to steel plate by forming an outer panel and an inner panel and joining the contacted edges of the outer and inner panel with an adhesive. CONSTITUTION: A method for manufacturing a plastic tailgate panel assembly comprises steps of forming an outer panel(20) and an inner panel(10) by using SMC(Sheet Molding Compound) as a reinforcement and filler and joining the contacted part of the outer and inner panel together with an adhesive. The SMC includes more glass fiber of 2.54 cm of 20¯35 percent and carbonic calcium of 30¯60 percent. The outer and inner panel is formed in a metal mold under 145 plus and minus 5 degrees centigrade and pressure of 50¯70 kgf/cm2 for 2¯6 minutes. A hinge reinforcement(15) of a two-stepped shape is installed at the inner panel and both ends of the hinge reinforcement are adhered to the inner panel. The weight of a tailgate is reduced by using SMC lighter than steel plate and therefore, smooth operation is performed. Moreover, the cost is reduced.
Abstract:
PURPOSE: A thermosetting resin fender manufacturing method is provided to modify the design easily with the excellent physical property, and to apply to the special vehicle such as an electric car efficiently by reducing the cost. CONSTITUTION: Three molds are gel-coated with unsaturated polyester resin, and one to four layered reinforcing agent containing glass fiber and carbon fiber of 20 to 60wt % is stacked in the gel-coated surface. The unsaturated polyester resin is selected among denatured bis-phenol resin, bis-phenol resin, isocyanate resin, ortho resin, terephthalic resin and vinylester resin. The reinforcing material made of glass fiber or carbon fiber is stacked like a chopped strand mat, a woven roving mat, a cloth mat or a yarn mat.
Abstract:
PURPOSE: A method is provided to produce a recycled resin by mixing a raw material resin with a smashing resin extruded a smashing material from a waste plastic rocker cover removed rubber and metal. CONSTITUTION: A method produces recycled resin by mixing a raw material resin with a smashing resin extruded a smashing material from a waste plastic rocker cover removed rubber and metal. The recycled resin is mixed 1 to 95wt% of the raw material resin. The waste plastic rocker cover is pulverized in 5 to 30mm and pulverized again in 1 to 4mm. The waste plastic rocker cover is also pulverized by mixing glass fiber as reinforcement with a filler without a dividing process per material.