Polymeric compositions for medical packaging and devices
First Claim
1. A polymer based composition for fabricating into articles for medical applications comprising:
- a polypropylene;
a polyolefin selected from the group consisting of an ultra-low density polyethylene, polyethylene, copolymers of ethylene, polybutene-1, and copolymers of butene-1;
wherein the polypropylene and polyolefin together comprise 55% or more by weight of the polymeric composition;
a radio frequency susceptible polymer having a dielectric loss greater than 0.05 at 1-60 MHz and ambient temperature to 250°
C., the susceptible polymer being selected from the group consisting of a polyurethane, polyurea, polyimide, and polysulfone;
a compatibilizing polymer conferring compatibility among the polypropylene and the polyolefin and the radio frequency susceptible polymer, the compatibilizing polymer being a styrene and hydrocarbon block copolymer andwherein the composition has a mechanical modulus of less than 40,000 psi when measured according to ASTM D-882.
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Abstract
Multiple component polymer compositions for fabrication into articles. In particular, polymeric compositions comprising a heat resistant polymer; a radio frequency ("RF") susceptible polymer; a compatibilizing polymer; the composition having physical properties within the range a<40,000 psi; b>=70%; c<30%; d>1.0; e<0.1%; f<0.1%; g>=0.05; h<=60%; i=0; wherein: a is the mechanical modulus of the composition measured according to ASTM D-882; b is the percent recovery in length of the composition after an initial 20% deformation; c is the optical haze of the composition being 9 mils in thickness according to ASTM D-1003; d is the loss tangent of the composition at 1 Hz measured at melt processing temperatures; e is the elemental halogen content by weight of the composition; f is the low molecular weight water soluble fraction of the composition; g is the dielectric loss between 1 and 60 MHz and over temperatures of 25° to 250° C. of the composition; h sample creep measured at 121° C. for a 1 inch strip of the composition under 27 psi loading; and, i indicates the composition exhibits no strain whitening after being strained at moderate speeds of about 20 inches (50 cm) per minute to about 100% elongation (twice the original length) and the presence of strain whitening (indicated by 1) or lack thereof (indicated by 0) is noted.
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Citations
9 Claims
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1. A polymer based composition for fabricating into articles for medical applications comprising:
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a polypropylene; a polyolefin selected from the group consisting of an ultra-low density polyethylene, polyethylene, copolymers of ethylene, polybutene-1, and copolymers of butene-1; wherein the polypropylene and polyolefin together comprise 55% or more by weight of the polymeric composition; a radio frequency susceptible polymer having a dielectric loss greater than 0.05 at 1-60 MHz and ambient temperature to 250°
C., the susceptible polymer being selected from the group consisting of a polyurethane, polyurea, polyimide, and polysulfone;a compatibilizing polymer conferring compatibility among the polypropylene and the polyolefin and the radio frequency susceptible polymer, the compatibilizing polymer being a styrene and hydrocarbon block copolymer and wherein the composition has a mechanical modulus of less than 40,000 psi when measured according to ASTM D-882. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A polymer based composition for fabricating into articles for medical applications comprising:
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a polypropylene; an ultra-low density polyethylene; wherein the polypropylene and the ultra-low density polyethylene together comprise 55% or more by weight of the polymeric composition; a polyurethane; a styrene and hydrocarbon block copolymer; and wherein the composition has a mechanical modulus of less than 40,000 psi when measured according to ASTM D-882.
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Specification