Abstract:
PURPOSE: A manufacturing method of polylactic acid material with high degree of crystallinity is provided to reduce amount of D form polylactic acid. CONSTITUTION: A manufacturing method of polylactic acid material comprises the following steps: manufacturing stereo complex crystals by mixing D form and L form polylactic acids; mixing the added mixture after adding the stereo complex crystals to the D form and L form polylactic acids; and heating and holding the mixed stereo complex crystal-containing polylactic acid at 150-230 deg. Celsius. The D form and L form polylactic acids are respectively having the weight-average molecular weight of 30,000-150,000 g/mol. [Reference numerals] (AA) Manufacturing stereo complex crystal particles; (BB) Mixing the stereo complex particles and polylactic acid; (CC) Forming stereo complex particle dispersed polylactic acid; (DD) Nanoparticles: manufacturing supercritical water particles, microparticles: pulverization after blending, and fiber particles: melt spinning and others; (EE) Blending temperature condition: 180-210°C; (FF) Forming temperature condition: 180-210°C
Abstract:
본 발명은 공기질 개선 등을 위해 자동차 내장재 등에 적용할 수 있는 향기 나는 플라스틱 및 이의 제조방법에 관한 것으로, 보다 상세하게는 향기 나는 에센스(essence) 오일과 향기 나지 않는 캐리어(carrier) 오일의 혼합물 및 플라스틱 등을 포함함으로써, 플라스틱 제품 자체에서 은은한 허브 향 등을 첨가할 수 있으며, 차량 내장재에 적용하여 차량 내부의 공기에 대한 질의 향상을 촉진할 수 있고, 본 발명을 생분해성 수지에 적용할 경우, 상기 생분해성 수지가 분해되면서 줄어드는 향의 변화를 이용하여 교환 부품에 대한 교체 시기의 알림 기능을 부여할 수 있는 효과가 있는 향기가 나는 플라스틱에 관한 것이다.
Abstract:
The present invention relates to a polymer resin composition for interior and exterior materials of vehicles, a molded resin article for interior and exterior materials of vehicles , and a method for preparing the same and, more specifically, to a polymer resin composition for interior and exterior materials of vehicles, which includes a polypropylene resin, a polylactic acid resin, glass fibers, a copolymer including an ethylene repeated unit and a (meth)acrylate-base repeated unit, and a sulfonic acid compound, and a molded resin article. The polymer resin composition and a molded resin article for interior and exterior materials of vehicles contain a certain content or more of a material derived from biomass, thereby being environmentally friendly and having the excellent mechanical properties such as the heat resistance and impact resistance.
Abstract:
The present invention relates to a method for producing lactide using a solvent. In a second step when the lactide is produced, an ionic liquid is used as a solvent so that the mobility of a reactant is ensured. Then, reaction temperature is decreased and moisture generated during the reaction is absorbed from the ionic liquid, so that the lactide which is weak in the presence of moisture is not decomposed. In addition, the lactide can be continuously produced by continuously adding oligomers. The contamination of a reactor caused by a reaction by-product is minimized by means of the ionic liquid, and a solvent for washing the reactor is not needed. Furthermore, by means of the high boiling point of the ionic liquid, the ionic liquid can be easily collected and recycled.
Abstract:
The present invention relates to a high heat dissipation polylactic acid composite material composition and a method of manufacturing the same, and more specifically, to a high heat dissipation polylactic acid composite material composition in which an L-polylactic acid resin, a D-polylactic acid resin, and a carbon fiber are mixed so that heat dissipation and mechanical properties are improved; has a low environmental load effect by replacing to a low-carbon-biomass based material instead of an existing general-purpose polymer resin; and can be used in various industrial material fields such as automobile parts, electronic equipment housing, etc. using the same, and a method of manufacturing the same. [Reference numerals] (AA) Carbon fiber (CNT growth on surface); (BB) Housing; (CC) Heat generating device
Abstract:
The present invention relates to a preparing method of lactide from a lactic acid at high yield. A low molecular weight polylactic acid is obtained by a polymerization reaction based on a D type lactic acid as a starting material and is thermally decomposed to manufacture D type lactide to obtain the D type lactide at high yield based on a simple method. The manufacturing costs of polylactic acid resin can be reduced using the D type lactide as the raw material of a D type polylactic acid. The lactide can be used for various uses such as vehicle engine, chassis parts, bioplastic, and display housing as biomass derived materials. [Reference numerals] (AA) Perform fermentation from biomass;(BB) Extract and separate D type lactic acid;(CC) Convert the D type lactic acid into D type lactide;(DD) Polymerize D type polylactic acid;(EE) Pulverize the polymer