Laminated material of segregating membrane and segregating membrane supporting material, and its method of manufacture
AssigneesAwa Paper Mfg. Co., Ltd., Japan Exlan Company Limited
InventorsYoshitsugu Hama, Hideo Naka, Yoshifumi Kusaka, Akihiro Okubo
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Abstract
Segregating membrane supporting material is a three-dimensional assembly of fibers thermo-compressed into non-woven fabric, and the non-woven fabric fibers are joined together in sheet form. This segregating membrane supporting material is non-woven fabric, including at least 10 weight % polyacrylonitrile-based synthetic fibers, which is thermo-compressed to give an overall bulk density 40% to 75% of the density of the fibers which make up the non-woven fabric.
Claims81
A membrane casted material made of a segregating membrane and a segregating membrane supporting material in which the segregating membrane is casted on the segregating membrane supporting material, the membrane casted material comprising:
- a segregating membrane including at least one member selected from the group consisting of polysulfone-based, polyvinylidene fluoride-based, polyamide-based, polyimide-based, and polyacrylonitrile-based high polymer materials, and
- a segregating membrane supporting material in which fibers are assembled in three-dimensions to form non-woven fabric, the non-woven fabric is processed by thermo-compression to join together fibers, which make up the non-woven fabric in sheet form, making the segregating membrane supporting material, and the non-woven fabric includes at least 10 weight % polyacrylonitrile-based synthetic fibers having a fiber length of 1 mm–25mm and is processed by thermo-compression making a segregating membrane supporting material with overall bulk density 40% to 75% of the density of the fibers which make up the non-woven fabric, and
- wherein the segregating membrane is dissolved in a solvent during casting which also dissolves the support material to bind the segregating membrane and segregating membrane supporting material.
A method of manufacturing a membrane casted material in which a segregating membrane is casted on a segregating membrane supporting material,
- wherein fibers are assembled in three-dimensions to form non-woven fabric, and non-woven fabric is processed by thermo-compression to join together fibers, which make up the non-woven fabric in sheet form, making the segregating membrane supporting material,
- the method comprising:
- processing by thermo-compression of the non-woven fabric including at least 10 weight % polyacrylonitrile-based synthetic fibers having a fiber length of 1 mm–25 mm to make a segregating membrane supporting material with overall bulk density 40% to 75% of the density of the fibers which make up the non-woven fabric, and
- casting the segregating membrane on the segregating membrane supporting material,
- wherein the segregating membrane includes at least one member selected from the group consisting of polysulfone based, polyvinylidene fluoride-based, polyamide-based, polyimide-based, and polyacrylonitrile-based high polymer materials, and
- wherein the segregating membrane is dissolved in a solvent during casting which also dissolves the support material to bind the segregating membrane and segregating membrane support material.
A membrane casted material made of a segregating membrane and a segregating membrane supporting material in which the segregating membrane is casted on the segregating membrane supporting material, the membrane casted material comprising:
- a segregating membrane including at least one member selected from the group consisting of polysulfone-based, polyvinylidene fluoride-based, polyamide-based, polyimide-based, and polyacrylonitrile-based high polymer materials, and
- a segregating membrane supporting material in which fibers are assembled in three-dimensions to form non-woven fabric, the non-woven fabric is processed by thermo-compression to join together fibers, which make up the non-woven fabric in sheet form, making the segregating membrane supporting material, and the non-woven fabric includes at least 10 weight % polyacrylonitrile-based synthetic fibers and low melting point polyester binder fibers and is processed by thermo-compression making a segregating membrane supporting material with overall bulk density 40% to 75% of the density of the fibers which make up the non-woven fabric, and
- wherein the segregating membrane is dissolved in a solvent during casting which also dissolves the support material to bind the segregating membrane and segregating membrane supporting material.
A membrane casted material made of a segregating membrane and a segregating membrane supporting material in which the segregating membrane is casted on the segregating membrane supporting material, the membrane casted material comprising:
- a segregating membrane including at least one member selected from the group consisting of polysulfone-based, polyvinylidene fluoride-based, polyamide-based, polyimide-based, and polyacrylonitrile-based high polymer materials, and
- a segregating membrane supporting material in which fibers are assembled in three-dimensions to form non-woven fabric, the non-woven fabric is processed by thermo-compression to join together fibers, which make up the non-woven fabric in sheet form, making the segregating membrane supporting material, and the non-woven fabric includes at least 10 weight % polyacrylonitrile-based synthetic fibers and un-extended polyester binder fibers and is processed by thermo-compression making a segregating membrane supporting material with overall bulk density 40% to 75% of the density of the fibers which make up the non-woven fabric, and
- wherein the segregating membrane is dissolved in a solvent during casting which also dissolves the support material to bind the segregating membrane and segregating membrane supporting material.
A method of manufacturing a membrane casting material in which a segregating membrane is casted on a segregating membrane supporting material,
- wherein fibers are assembled in three-dimensions to form non-woven fabric, and non-woven fabric is processed by thermo-compression to join together fibers, which make up the non-woven fabric in sheet form, making the segregating membrane supporting material,
- the method comprising:
- processing by thermo-compression of the non-woven fabric including at least 10 weight % polyacrylonitrile-based synthetic fibers and low melting point polyester binder fibers to make a segregating membrane supporting material with overall bulk density 40% to 75% of the density of the fibers which make up the non-woven fabric, and
- casting the segregating membrane on the segregating membrane supporting material,
- wherein the segregating membrane includes at least one member selected from the group consisting of polysulfone based, polyvinylidene fluoride-based, polyamide-based, polyimide-based, and polyacrylonitrile-based high polymer materials,
- wherein the segregating membrane is dissolved in a solvent during casting which also dissolves the support material to bind the segregating membrane and segregating membrane support material.
A method of manufacturing a casting membrane material in which a segregating membrane is casted on a segregating membrane supporting material,
- wherein fibers are assembled in three-dimensions to form non-woven fabric, and non-woven fabric is processed by thermo-compression to join together fibers, which make up the non-woven fabric in sheet form, making the segregating membrane supporting material,
- the method comprising:
- processing by thermo-compression of the non-woven fabric including at least 10 weight % polyacrylonitrile-based synthetic fibers and un-extended polyester binder fibers to make a segregating membrane supporting material with overall bulk density 40% to 75% of the density of the fibers which make up the non-woven fabric, and
- casting the segregating membrane on the segregating membrane supporting material,
- wherein the segregating membrane includes at least one member selected from the ground consisting of polysulfone based, polyvinylidene fluoride-based, polyamide-based, polyimide-based, and polyacrylonitrile-based high polymer materials,
- wherein the segregating membrane is dissolved in a solvent during casting which also dissolves the support material to bind the segregating membrane and segregating membrane support material.
Dependencies are inferred from the claim text.