Scouring pad fabricating method

• US 6,180,035 B1
• Filed: 05/04/1999
• Issued: 01/30/2001
• Est. Priority Date: 05/04/1999
• Status: Expired due to Fees

• Current Assignee: Hsieh, Ming-Ti, Mo-Hsaing Lin
• Original Assignee: Hsieh, Ming-Ti, Mo-Hsaing Lin
• Inventors: Lin, Mo-Hsaing, Hsieh, Ming-Ti
• Primary Examiner(s): Ball, Michael W.
• Assistant Examiner(s): Musser, Barbara J.
• Application Number:
  US09/304,059
• Time in Patent Office: 637 Days
• Field of Search: 264/46.5, 156/254, 156/78, 156/79, 156/15.5, 156/96, 152/441, 152/443
• US Class Current: 264/46.5
• CPC Class Codes: B29C 44/1228 Joining preformed parts by the expanding material
• CPC Class Codes: B29C 44/5654 Subdividing foamed articles to obtain particular surface properties, e.g. on multiple modules
• CPC Class Codes: B32B 2307/728 Hydrophilic
• CPC Class Codes: B32B 2329/04 Polyvinylalcohol
• CPC Class Codes: B32B 5/20 foamed in situ

Abstract

A scouring pad fabrication method, which includes the step of coating a hydrophilic material on the top side wall of a first scouring pad been put in a mold, the step of pouring a sponge dope in the mold over the hydrophilic material and then placing a second scouring pad on the sponge dope, the step of heating the mold to let the hydrophilic material be dissolved in the sponge dope and foamed with the sponge dope into a sponge, the step of taking the foamed material thus obtained out of the mold and then splitting the foamed material into two equal halves each having a sponge layer and a scouring pad at one side of the sponge layer.

Claims

1. A scouring pad fabrication method comprising the steps of:

(a) putting a first scouring pad in a mold;

(b) coating a top side wall of said first scouring pad with a layer of hydrophilic material;

(c) pouring a sponge dope in said mold over said layer of hydrophilic material;

(d) placing a second scouring pad on said sponge dope;

(e) heating said mold, enabling said hydrophilic material to be dissolved in said sponge dope and foamed with said sponge dope into a sponge;

(f) taking the foamed material thus obtained out of said mold; and

(g) splitting said foamed material into two equal halves each having a sponge layer and a scouring pad at one side of said sponge layer.

2. The scouring pad fabrication method of claim 1 wherein said layer of hydrophilic material is obtained from a compound containing starch, CMC (carboxyl-methyl-cellulose), PVP (polyvinyl pyrrolidone), PVA (polyvinyl alcohol), and PEG (polyethylene glycol).