Patent ID: 11970566
Assignee: CHIN YANG CO., LTD.
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC B  C

Claim 0:
1. A method of manufacturing a polyurethane filter foam, comprising:
preparing a foam composition comprising a polyol component and an isocyanate;
stirring the foam composition;
discharging stirred foam composition through a foaming head of a foaming machine to obtain an intermediate;
foaming the intermediate to obtain a foam; and
forming the polyurethane filter foam with the foam,
wherein a diameter of the foaming head is about 30 mm to 45 mm; and
wherein the polyol component comprises:
a first polyol having a weight average molecular weight of about 2,000 g/mol to 3,000 g/mol and having 3 to 4 first functional groups;
a second polyol having a weight average molecular weight of 9,000 g/mol to 11,000 g/mol and having 5 to 7 second functional groups; and
a third polyol having a weight average molecular weight of 50 g/mol to 1,000 g/mol and having 1 to 2 third functional groups.