Prefilled syringe
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United States of America Patent
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Mar 19, 2013
Grant Date -
Apr 29, 2010
app pub date -
Dec 17, 2007
filing date -
Dec 20, 2006
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Provided is a prefilled syringe comprising, as a resin constituting at least a barrel and a joint, a polyester resin that contains a diol unit having a cyclic acetal skeleton in an amount of from 1 to 30% by mol based on diol units and a dicarboxylic acid unit having a naphthalene skeleton in an amount of 70% by mol or more based on dicarboxylic acid units, and satisfies the following parameters: (i) a glass transition temperature of 110° C. or more measured with a differential scanning calorimeter, (ii) a moisture permeation coefficient of 1 g·mm/m2/day or less, and (iii) an oxygen permeation coefficient of 10 cc·mm/m2/day/atm or less.
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