Back to results
US 2002/0117280 A1Published application
Fibrous sheet enhancement
OwnerMatthew Howle, Karl B. Himmelbergerinventors
Life of this patent
Estimating the term…
Abstract
A method and composition are disclosed for providing a two-part polymer binder additive for a fibrous sheet by improving both its strength and durability. The polymer binder comprises both the addition of a resin system and an anionic polymer which impart both increased strength and resistance to moisture and sagging. The resin system includes a polyamidoamine-epihalohydrin resin, a latex and an anionic polymer.
Claims25
A polymer binder for a fibrous sheet comprising:
- a resin system comprising a polyamidoamine-epihalohydrin resin and a polymer having repeating units derived from an alkyl halide having at least one double bond and an alkene;
- and
- an anionic polymer.
A method of forming a fibrous sheet comprising:
- forming a fibrous slurry;
- mixing into the fibrous slurry a resin system comprised of a polyamidoamine-epihalohydrin resin and a polymer having repeating units derived from an alkyl halide having at least one double bond and an alkene;
- next mixing into the fibrous slurry an anionic polymer;
- then forming the fibrous slurry into a fibrous sheet;
- and
- drying the fibrous sheet.
3 more elements
A fibrous sheet comprising:
- at least one type of fiber;
- a resin system comprising a polyamidoamine-epihalohydrin resin and a polymer having repeating units derived from an alkyl halide having at least one double bond and an alkene;
- and
- an anionic polymer.
1 more element
Dependencies are inferred from the claim text.