Abstract:
PURPOSE: A biodegradable foam composition for midsole using polylactic acid and a manufacturing method thereof are provided to improve biodegradability, durability and hardness. CONSTITUTION: A biodegradable foam composition for midsole using polylactic acid is composed of polylactic acid mixture substrate. The mixed material is composed of a mixture of copolymers and polylactide acid. The biodegradable foam composition comprises 1-10 parts by weight of plasticizer, 1-10 parts by weight of silane coupling agent, 0.1-1.5 parts by weight of cross-linking agent, 2-5 parts by weight of foaming agent, 1-10 parts by weight of metal oxide, 0.5-2 parts by weight of stearic acid and 1-10 parts by weight of calcium carbonate based on 100.0 parts by weight of the mixed material. 20-60 parts by weight of the polylactic acid is included based on 100.0 parts by weight the mixed material. A manufacturing method of the biodegradable foam composition comprises the following steps: manufacturing a master batch by mixing polylactic acid mixture substrate. The mixed material is composed of a mixture of copolymers and polylactide acid. The biodegradable foam composition comprises the following steps: manufacturing a mixture by mixing plasticizer, silane coupling agent, cross-linking agent, foaming agent, metal oxide, stearic acid and calcium carbonate(s1); mulling a additive for foaming, plasticizer, and silane compling agent(s2); and mixing the mulling material with cross-linking agent and a forming agent(s3).
Abstract:
PURPOSE: A flexible polylactic acid composition and a manufacturing method thereof are provided to minimize degradation problem of mechanical strength and migration problem due to use of normal plasticizer. CONSTITUTION: A flexible polylactic acid composition is obtained by mixing 10-100 parts by weight of modified plasticizer master batch with 100.0 parts by weight of polylactide acid. A manufacturing method of the flexible polylactic acid composition comprises the following steps: (S1) manufacturing modified plasticizer master batch by maturing a mixture of 100.0 parts by weight of acrylic powder and 50-300 parts by weight of plasticizer in an oven at 50-70 deg. Celsius for 10-30 minutes; and (S2) mixing 100.0 parts by weight of polylactide acid with 10-100.0 parts by weight of modified plasticizer master batch in a kneader at 120-170 deg. Celsius for 5-20 minutes.
Abstract:
The purpose of the present invention is to provide a modified biodegradable resin with improved flexibility, a method for modifying a biodegradable resin, and a biodegradable foam composition using the same. The method for modifying the biodegradable resin mixes a plasticizer and an initiator with the biodegradable resin and heats the same. To this end, the modified biodegradable resin of the present invention comprises 10 to 50 parts by weight of the plasticizer and 0.1 to 2.0 parts by weight of the initiator based on 100 parts by weight of the biodegradable resin.
Abstract:
본 발명은 가죽 폐기물로부터 단백질 가수 분해물을 추출한 후, 추출된 단백질 가수 분해물을 아민 화합물로 변성 개질하여 포름알데히드 제거 기능을 갖도록 한 것을 특징으로 하는 가죽 폐기물로부터 추출한 단백질 가수 분해물을 이용하여 포름알데히드 제거제를 제조하는 방법에 관한 것으로, 가죽 폐기물로부터 단백질 가수 분해물을 추출한 후, 추출된 단백질 가수 분해물을 아민 화합물로 변성 개질시킨 변성 단백질 가수 분해물을 가죽 가공 공정시 포름알데히드 제거제로 투입하여 가공 가죽에 함유된 포름알데히드 또는 가죽 내 잔여 포름알데히드를 제거함으로써, 새집 증후군 예방할 수 있는 제거제로 활용될 수 있으며, 특히 가죽 폐기물을 재활용함으로써 친환경 공법인 것이 장점이다
Abstract:
The present invention relates to a biodegradable foam composition. The present invention improves the crosslink density, permanent compression set and biodegradation properties of a foam by using 1,2-polybutadiene, which is a crosslink agent and exhibits high crosslink speed and crosslink efficiency on peroxides, as an additive. Additionally, the biodegradable foam composition of the present invention facilitates the appearance formation of the foam without the degradation of physical properties etc. by using the 1,2-polybutadiene as the additive when more than 20 parts by weight of a biodegradable resin based on 100 parts by weight of a polymer base material is used.