| 摘要 |
#CMT# #/CMT# The cap (1') has a shell (2) and a multilayer joint (3) with a metal layer forming a barrier against gas diffusion. A malleable support layer provides, adjacent set of layers, a malleable global mechanical behavior permitting, in association with a resilient layer, the joint to be subjected to deformation imposed by shaping the joint without formation of folds. An external layer in plastic material has an external surface to be indented under an axial compression effect of the cap and the joint against a neck such that the external surface mates with a widemouthed surface of the neck. #CMT# : #/CMT# The joint is free from a layer in a cellulosic material or in paper e.g. kraft paper. Independent claims are also included for the following: (1) a method for manufacturing a sealing cap (2) a method for capping a neck of a bottle. #CMT#USE : #/CMT# Sealing cap i.e. screw cap, for closing a neck of a container i.e. bottle, containing pressurized liquid (claimed) e.g. drinks. #CMT#ADVANTAGE : #/CMT# The cap permits to completely and effectively close the neck of the container in a sealed manner, thus permitting the cap to be easily screwed and unscrewed, and guaranteeing a sealing to gas and to liquids between interior and exterior of the container. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows an axial sectional view of a left part of a sealing cap with a skirt in a vertical plane along an axial direction and side view of a right part of the cap. 1' : Sealing cap 2' : Shell 3 : Multilayer joint 20' : Head 21' : Skirt #CMT#INORGANIC CHEMISTRY : #/CMT# The layer forming barrier is made of silicon oxide. #CMT#METALLURGY : #/CMT# The layer forming barrier and the malleable support layer are made of a metal or metal alloy e.g. aluminum, alloy of aluminum, steel and tin, and tin alloy. The adjacent set of layers are made of metal e.g. aluminum or aluminum alloy. #CMT#ORGANIC CHEMISTRY : #/CMT# The layer forming barrier is made of polyvinylidene chloride. #CMT#POLYMERS : #/CMT# The resilient layer is made of an expanded polymer material, expanded polystyrene, expanded polypropylene, expanded polyethylene, elastomeric material, polymer and thermoplastic elastomer e.g. styrene-isoprene-styrene, styrene-butadiene-styrene, or styrene ethylene butylene styrene. The layer forming barrier is made of ethylene-vinyl alcohol copolymer. The malleable support layer is made of a thermoplastic material e.g. polyolefin, polyamide or polyethylene terephtalate. The external layer is made of a polyamide. The adjacent set of layers is made of a plastic material, ethylene-acrylic acid (EAA) copolymer, or polyamide. The shell is made of a plastic material. |
