DAVID MICHAEL HILL
Pilots at Lincoln St, Wilmington, DE
License number
Delaware A4290703
Category
Airmen
Type
Authorized Aircraft Instructor
Address
Address
5 S Lincoln St, Wilmington, DE 19805
Professional information
Breathable Microporous Film
US Patent:
5008296, Apr 16, 1991
Filed:
Mar 29, 1990
Appl. No.:
7/500975
Inventors:
Mitchell K. Antoon - Wilmington DE
David J. Hill - Wilmington DE
David J. Hill - Wilmington DE
Assignee:
Hercules Incorporated - Wilmington DE
International Classification:
C08J 932, C08J 936, B29C 5512
US Classification:
521 91
Abstract:
A soft, flexible, microporous film is provided having high tensile strength and good air and water vapor transmission rates therethrough while being substantially impenetrable to liquid water. This film is prepared by stretching a casting of a composition of a polyolefin and high levels of CaCO. sub. 3 or glass beads and calcium stearate in two directions from 1. 5-7 times in each direction to produce a film having a Gurley porosity of from 0. 1 to 85 seconds. This film is especially useful for disposable items such as feminine panty liners, diapers, bed sheets, and hospital gowns. When glass beads are substituted for the CaCO. sub. 3, the film is useful for battery separators.
Breathable Microporous Film And Methods For Making It
US Patent:
5011698, Apr 30, 1991
Filed:
Nov 5, 1990
Appl. No.:
7/608785
Inventors:
Mitchell K. Antoon - Wilmington DE
David J. Hill - Wilmington DE
David J. Hill - Wilmington DE
Assignee:
Hercules Incorporated - Wilmington DE
International Classification:
B65B 2504
US Classification:
426395
Abstract:
A soft, flexible, microporous film is provided having high tensile strength and good air and water vapor transmission rates therethrough while being substantially impenetrable to liquid water. This film is prepared by stretching a casting of a composition of a polyolefin and high levels of CaCO. sub. 3 or glass beads and calcium stearate in two directions from 1. 5-7 times in each direction to produce a film having a Gurley porosity of from 0. 1 to 85 seconds. This film is especially useful for disposable items such as feminine panty liners, diapers, bed sheets, and hospital gowns. When glass beads are substituted for the CaCO. sub. 3, the film is useful for battery separators.
Breathable Microporous Film And Methods For Making It
US Patent:
4923650, May 8, 1990
Filed:
Jul 27, 1988
Appl. No.:
7/224632
Inventors:
Mitchell K. Antoon - Wilmington DE
David J. Hill - Wilmington DE
David J. Hill - Wilmington DE
Assignee:
Hercules Incorporated - Wilmington DE
International Classification:
C08J 932, C08J 936, B29C 5512
US Classification:
264 41
Abstract:
A soft, flexible, microporous film is provided having high tensile strength and good air and water vapor transmission rates therethrough while being substantially impenetrable to liquid water. This film is prepared by stretching a casting of a composition of a polyolefin and high levels of CaCO. sub. 3 or glass beads and calcium stearate in two directions from 1. 5-7 times in each direction to produce a film having a Gurley porosity of from 0. 1 to 85 seconds. This film is especially useful for disposable items such as feminine panty liners, diapers, bed sheets, and hospital gowns. When glass beads are substituted for the CaCO. sub. 3, the film is useful for battery separators.
Heat Sealable Microporous Polypropylene Films
US Patent:
4734324, Mar 29, 1988
Filed:
Mar 27, 1987
Appl. No.:
7/030801
Inventors:
David J. Hill - Wilmington DE
Assignee:
Hercules Incorporated - Wilmington DE
International Classification:
B32B 326
US Classification:
4283173
Abstract:
This invention relates to a microporous film having a heat sealable layer on one or both sides thereof. The porosity and permeability of the microporous layer are retained despite the application of the heat seal layer.