Building construction felt paper with biocide/anti-microbial treatment

• US 7,410,553 B2
• Filed: 03/04/2005
• Issued: 08/12/2008
• Est. Priority Date: 03/04/2005
• Status: Expired due to Fees

• Current Assignee: Atlas Roofing Corporation (Hood Cos., Inc.)
• Original Assignee: Atlas Roofing Corporation (Hood Cos., Inc.)
• Inventors: Blanpied, Robert H., Murphy, Freddie Lee
• Primary Examiner(s): RUDDOCK, ULA CORINNA
• Application Number:
  US11/071,577
• Publication Number:
  US 20060199454A1
• Time in Patent Office: 1,257 Days
• Field of Search: 442/123, 162/100, 162/161, 162/189, 162/231, 427/359, 427/361
• US Class Current: 162/100
• CPC Class Codes: D21H 11/14 Secondary fibres working-up waste paper D21C5/02
• CPC Class Codes: D21H 21/36 Biocidal agents, e.g. fungicidal, bactericidal, insecticidal agents
• CPC Class Codes: Y10T 442/20 Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
• CPC Class Codes: Y10T 442/2525 Coating or impregnation functions biologically [e.g., insect repellent, antiseptic, insecticide, bactericide, etc.]

Abstract

A nonwoven web has a weight sufficient for construction industry use and comprises at least forty percent (40%) recycled waste paper. At least one surface of the web bears a biocide, e.g., has a biocide applied thereto. Preferably the weight of the web is greater than fifteen pounds per thousand square feet (15-lbs/MSF). Preferably the biocide is zinc pyrithione. The web preferably bears at least 50-grams of biocide per thousand square feet per side of said web. One example use of the web is as builders felt, with other uses including as a facer for a laminate board and for asphalt-impregnated webs. The biocide-bearing nonwoven web is specifically directed to use in building construction. One example use of the web is as builders felt, with other uses including as a facer for a laminate board and for asphalt-impregnated webs. Because building construction products must be tough, but priced as low as possible, this web is made largely from recycled waste paper (as opposed to virgin cellulose fiber, as a cost-reducing measure), and optionally clarifier sludge.

Claims

1. A process of making a nonwoven web comprising:

introducing a furnish comprising at least forty percent (40%) recycled waste paper into a paper forming machine to produce a web substrate having a weight sufficient for construction industry use, the web substrate being susceptible of being wound by a reel forming device; and

then

applying a biocide to at least one surface of the web substrate.

2. The process of claim 1, further comprising applying the biocide at a size press.

3. An article produced by the process of claim 2.

4. The process of claim 1, further comprising applying the biocide at a shower of a steam-heated dryer.

5. An article produced by the process of claim 4.

6. The process of claim 1, further comprising applying the biocide at a waterbox of a calender roll.

7. An article produced by the process of claim 6.

8. The process of claim 1, further comprising applying the biocide after a wet-press section.

9. An article produced by the process of claim 8.

10. The process of claim 1, further comprising applying the biocide at a coater.

11. An article produced by the process of claim 10.

12. An article produced by the process of claim 1.

13. The process of claim 1, wherein the biocide comprises zinc pyrithione;

ortho-Phenyl Phenol;

or, a silicone quaternary amine with an active ingredient 3-trimethixysilylpropyldimethyloctadecyl ammonium chloride.

14. The process of claim 1, wherein the web comprises builders felt.