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US 2002/0164492 A1Published application
Multi-layered polymer based thin film structure for medical grade products
AssigneeBaxter International Inc.
InventorsGregg Nebgen, Keith M.K. Anderson, Michael W. Scharf
Life of this patent
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Abstract
A multiple layer structure comprising a first and a second skin layer, each skin layer composed of a polypropylene containing polymer, and a radio frequency (“RF”) susceptible layer adhered to and between the first and second skin layers. The RF layer has a first component of a propylene based polymer, a second component of a non-propylene polyolefin, a third component of a radio frequency susceptible polymer, and a fourth component of a polymeric compatibilizing agent.
Claims53
A multiple layer structure comprising:
- a first skin layer;
- a radio frequency (“RF”) susceptible layer adhered to the first skin layer, the RF layer having a first component of a propylene based polymer, a second component of a non-propylene polyolefin, a third component of a radio frequency susceptible polymer, and a fourth component of a polymeric compatibilizing agent;
- and
- a second skin layer adhered to the RF layer and opposed to the first skin layer;
- the structure 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 processed into a film 9 mils in thickness measured in accordance 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 is the sample creep measured at 121° C. for a 1 inch strip of the composition under 27 psi loading;
- and,
- i 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.
22 more elements
A multiple layer structure comprising:
- a first skin layer of a propylene-containing polymer;
- a radio frequency (“RF”) susceptible layer adhered to the first skin layer, the RF layer having a first component of a propylene based polymer, a second component of a non-propylene polyolefin, a third component of a radio frequency susceptible polymer, and a fourth component of a polymeric compatibilizing agent;
- and
- a second skin layer adhered to the RF layer and opposed to the first skin layer, the second skin layer being a propylene-containing polymer.
1 more element
A multiple layer structure comprising:
- a first skin layer of a propylene-containing polymer;
- a radio frequency (“RF”) susceptible layer adhered to the first skin layer, the RF layer having a first component of a propylene based polymer in an amount in a range of 30-60% by weight of the RF layer, a second component of a non-propylene polyolefin in an amount within the range of 0-60% by weight of the RF layer, a third component of a radio frequency susceptible polymer in an amount within the range of 3-40% by weight of the RF layer, and a fourth component of a polymeric compatibilizing agent in an amount within the range of 5-40% by weight of the RF layer;
- and
- a second skin layer adhered to the RF layer and opposed to the first skin layer, the second skin layer being a propylene-containing polymer.
1 more element
A multiple layer structure comprising:
- a first skin layer of a propylene-containing polymer;
- a core layer having a side adhered to the first skin layer;
- a radio frequency (“RF”) susceptible layer adhered to the core layer on a side opposite the first skin layer, the RF layer being composed of a first component of a propylene based polymer in an amount in a range of 30-60% of the weight of the RF layer, a second component of a non-propylene polyolefin in an amount within the range of 25-50% of the weight of the RF layer, a third component of a radio frequency susceptible polymer in an amount within the range of 3-40% by weight of the RF layer, and a fourth component of a polymeric compatibilizing agent in an amount within the range of 5-40% by weight of the RF layer;
- and
- a second skin layer adhered to the RF layer and opposed to the first skin layer, the second skin layer being a propylene-containing polymer.
2 more elements
A multiple layer structure of stacked layers comprising:
- a first skin layer of a propylene-containing polymer;
- a radio frequency (“RF”) susceptible layer, the RF layer being composed of a first component of a propylene based polymer in an amount in a range of 30-60% of the weight of the RF layer, a second component of a non-propylene polyolefin in an amount within the range of 25-50% of the weight of the RF layer, a third component of a radio frequency susceptible polymer in an amount within the range of 3-40% by weight of the RF layer, and a fourth component of a polymeric compatibilizing agent in an amount within the range of 5-40% by weight of the RF layer;
- a first core layer between the first skin layer and the RF layer;
- and,
- a scrap layer attached to the core layer;
- and
- a second skin layer adhered to the RF layer and opposed to the first skin layer, the second skin layer being a propylene-containing polymer.
4 more elements
A multiple layer structure comprising:
- a first skin layer of a propylene-containing polymer;
- a radio frequency (“RF”) susceptible layer, the RF layer being composed of a first component of a propylene based polymer in an amount in a range of 30-60% of the weight of the RF layer, a second component of a non-propylene polyolefin in an amount within the range of 25-50% of the weight of the RF layer, a third component of a radio frequency susceptible polymer in an amount within the range of 3-40% by weight of the RF layer, and a fourth component of a polymeric compatibilizing agent in an amount within the range of 5-40% by weight of the RF layer;
- a first core layer between the first skin layer and the RF layer;
- a barrier layer attached to the core layer;
- and
- a second skin layer adhered to the RF layer and opposed to the first skin layer, the second skin layer being a propylene-containing polymer.
3 more elements
A multiple layer structure comprising:
- a first skin layer of a propylene-containing polymer;
- a core layer having one side adhered to the first skin layer;
- a radio frequency (“RF”) susceptible layer adhered to the core layer on a side opposite the first skin layer, the RF layer being composed of a high melting temperature and flexible polypropylene in an amount in a range of 30-60% of the weight of the RF layer, a radio frequency susceptible polymer in an amount within the range of 5-20% by weight of the RF layer, and a polymeric compatibilizing agent in an amount within the range of 5-20% by weight of the RF layer;
- and
- a second skin layer adhered to the RF layer and opposed to the first skin layer, the second skin layer being a propylene-containing polymer.
2 more elements
Dependencies are inferred from the claim text.