HIGH STRENGTH POLYETHYLENE PRODUCTS AND A PROCESS FOR PREPARATION THEREOF

• Main Authors: MEHTA GAURANG MANILAL, SATPATHY UMA SANKAR, PATIL YOGESH POPATRAO, PATEL NANUBHAI FULJIBHAI, GANDHAM SATYA SRINIVASA RAO, SARMA KRISHNA RENGANATH, JASRA RAKSH VIR, MATHUR AJIT BEHARI
• Format: Patent
• Language: English; Korean
• Published: 05.02.2016
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; CHEMISTRY; COMPOSITIONS BASED THEREON; GENERAL PROCESSES OF COMPOUNDING; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCESIN A PLASTIC STATE; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; WORKING-UP

본 발명은 예비 건조된 적어도 50% 디스엔탱글먼트된 초고분자량 폴리에틸렌(UHMWPE) 가루를 제공하는 단계; 및 -15℃ - 50℃의 온도를 가지는 상기 UHMWPE 가루를 서로 다른 롤러(roller) 속도로 회전하는 적어도 한 쌍의 가열 연마한 반대 방향 회전 캘린더링 롤러(calendaring rollers)의 닙(nip)에서 공급하여 적어도 한 개의 예비-박판제품을 얻는 단계; 예정 온도와 예정 견인 속도에서 상기 예비-박판제품을 고온 연신하여 고강도 박판 제품을 얻는 단계와 같은 단계들로 이루어진 고강도 고모듈러스 폴리에틸렌 제품/박판 제조 공정에 관한 것이다. 본 발명에 의하여 제공된 박판 제품은 인장 세기 0.5 GPa - 3.0 GPa와 인장 모듈러스 40 GPa - 200 GPa를 가진다. The present disclosure relates to a process for the preparation of high strength and high modulus polyethylene products/laminates consisting of steps such as providing a pre-dried, at least 50% disentangled ultra-high molecular weight polyethylene (UHMWPE) powder, feeding the UHMWPE powder having temperature ranging from −15° C. to 50° C., at the nip of at least one pair of heated, polished counter rotating calendaring rollers, rotating at different roller speeds to obtain at least one pre-laminate and hot stretching the pre-laminate(s) at a pre-determined temperature and pre-determined stretching speed to obtain high strength laminates. The laminates provided by the present disclosure have tensile strength ranging between 0.5 GPa and 3.0 GPa and tensile modulus ranging between 40 GPa and 200 GPa.