Filter material for air filter and production method therefor
AssigneeHokuetsu Corpoaration
InventorsShota Fukushima, Junji Nemoto, Atsushi Tamura
Life of this patent
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Abstract
A method for producing a filter material for an air filter according to the present disclosure includes: an adhering step of getting a polyvinyl alcohol aqueous solution adhering to a support, having fluid permeability, to bring the support into a wet state; and a drying step of drying the polyvinyl alcohol aqueous solution adhering to the support in the wet state at 140° C. or higher, in which the polyvinyl alcohol aqueous solution contains no other binder resins than polyvinyl alcohol, and the support, after the drying step, has the mesh-like network of polyvinyl alcohol, in the pore serving as a fluid permeation path, by drying the polyvinyl alcohol aqueous solution.
Claims16
A method for producing a filter material for an air filter comprising:
- an adhering step of getting a polyvinyl alcohol aqueous solution adhering to a support, having fluid permeability, to bring the support into a wet state;
- and
- a drying step of drying the polyvinyl alcohol aqueous solution adhering to the support in a wet state at 140° C. or higher,
- wherein the polyvinyl alcohol aqueous solution contains no other binder resins than polyvinyl alcohol, and the support, after the drying step, has a mesh-like network of polyvinyl alcohol, in a pore serving as a fluid permeation path, by drying the polyvinyl alcohol aqueous solution.
A filter material for an air filter, characterized in comprising:
- a support having fluid permeability;
- and
- a mesh-like network of polyvinyl alcohol formed in a pore serving as the fluid permeation path of the support, wherein
- the mesh-like network is formed of the nanofiber,
- a polymerization degree of the polyvinyl alcohol is 1500 to 6000,
- a saponification degree of the polyvinyl alcohol is 60 to 90 mol %,
- an adhesion amount of the polyvinyl alcohol to the support is 0.05 to 1.00 mass %, and
- no other binder resins than the polyvinyl alcohol are contained.
Dependencies are inferred from the claim text.