Patent ID: 8999471
Filing Date: 2015-04-07
Classification: A61J,B29C,B32B,B65D,Y10T

Abstract:
1. A stopper having two opposite end faces for closing a medical system, the stopper comprising: a core made of a plastics material comprising one or more polymers having a high resilience and selected from polyphenylene oxide, styrene/ethylene/propylene copolymer (SEP), medical white oil and polybutylene; optionally one or more interlayers made of a plastics material comprising one or more polymers selected from functionalized polypropylene (PP), polyethylene (PE), functionalized styrene/ethylene/butylene block copolymer (SEB), polyethylene plastomer, polyethylene copolymer, ethylene/vinyl acetate (EVA), styrene/ethylene/propylene copolymer (SEP), oil, polypropylene (PP), polyethylene (PE), styrene/isoprene/styrene block copolymer (SIS), or polybutene (PB); and optionally an outer layer made of a plastics material comprising one or more polymers selected from polypropylene, polyester, polycarbonate, polyethylene copolymer, polyethylene plastomer, ethylene-vinyl acetate (EVA), PCCE or SEB/SEP, PMP, PB, plasticized PVC (PVC-P) or mixtures of these, wherein the material of the core, and when present the material of the outer layer of the stopper, softens at a temperature of 90° C. to such an extent that it enters together with a surrounding material into a bond after cooling to a temperature at least 20° C. below the temperature at which the material becomes fluid, and the stopper having a boat shape with a width of 10 to 40 mm, a length of 3 to 15 mm, and a thickness of 6 to 20 mm and being characterized in that it has at least one channel having a diameter of 6 to 9 mm.