Expansion of pasty processed ultra-high molecular weight polyethylene to dense articles

• Main Authors: JACKMAN SUSAN D, SBRIGLIA GUY A, STRID JASON J
• Format: Patent
• Language: Chinese; English
• Published: 23.08.2024
• 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; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; 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

Pasty processed ultra-high molecular weight polyethylene (UHMWPE) polymers, and processes for forming dense UHMWPE films from highly crystalline ultra-high molecular weight polyethylene polymers, are provided. The UHMWPE films described herein can be manufactured by: 1) compressing a dried porous UHMWPE tape, and then stretching at a temperature above the melt temperature of the UHMWPE polymer; 2) expanding, without compression, the dried porous UHMWPE strip at a temperature above the melt temperature of the UHMWPE polymer; or 3) expanding the dried porous UHMWPE tape at a temperature below the melt temperature of the UHMWPE polymer to form a porous film, followed by compressing the porous film at a temperature above the melt temperature of the UHMWPE polymer to form a dense film. The dense film can be further biaxially stretched to enhance the performance of the dense film. 提供了糊状加工的超高分子量聚乙烯(UHMWPE)聚合物，以及由高度结晶的超高分子量聚乙烯聚合物形成致密的UHMWPE膜的工艺。本文所述的UHMWPE膜可以通过以下方式制造：1)压缩干燥的多孔UHMWPE带材，然后在高于UHMWPE聚合物的熔体温度进行拉伸；2)在不压缩的情