Film and article comprising the same
AssigneeW.L. Gore & Associates G.K.
InventorHiroki Sadato
Life of this patent
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Abstract
A film including A.) a microporous polyethylene membrane, wherein the microporous polyethylene membrane includes polyethylene, wherein the polyethylene has a weight average molecular weight of greater than 500,000 grams/mole, wherein the microporous polyethylene membrane has a porosity of at least 40 vol %, and wherein the microporous polyethylene membrane has a Gurley number of less than 200 seconds! and B) a. hydrophilic polymer, wherein some of the hydrophilic polymer is within at least a portion of pores of the microporous polyethylene membrane, and at least some of the hydrophilic polymer forms a cap layer existing on at least one surface of the microporous polyethylene membrane, and wherein the cap layer is essentially free from voids.
Claims15
A film comprising:
- A) a microporous polyethylene membrane,
- wherein the microporous polyethylene membrane comprises polyethylene,
- wherein the polyethylene has a weight average molecular weight of greater than 500.000 grams/mole,
- wherein the microporous polyethylene membrane has a porosity of at least 40 vol %, and
- wherein the microporous polyethylene membrane has a Gurley number of less than 200 seconds;
- and
- B) a hydrophilic polymer,
- wherein some of the hydrophilic polymer is within at least a portion of pores of the microporous polyethylene membrane, and at least some of the hydrophilic polymer forms a cap layer existing on at least one surface of the microporous polyethylene membrane, and wherein the cap layer is essentially free from voids.
Dependencies are inferred from the claim text.