Oil resistant article
An oil resistant article is described that does not contain any fluorocarbon compounds. The oil resistant article includes a basesheet formed from pulp fibers. The basesheet is coated on at least one surface with an oil resistant coating. The basesheet is formed without having to use any highly refined fibers. Various chemical treatments are incorporated into the basesheet and the oil resistant coating is formed from particularly selected polymers that produces an oil resistant article having a relatively high permeability and excellent oil resistant properties.
1 . An oil resistant article comprising:
a paper basesheet comprising pulp fibers, the basesheet having a basis weight of from about 18 gsm to about 40 gsm, the basesheet including a first side and a second and opposite side; and
an oil resistant coating on at least one side of the basesheet, the oil resistant coating comprising a carboxymethyl cellulose, the carboxymethyl cellulose having a viscosity of less than about 800 cPs and greater than about 5 cPs;
wherein the oil resistant article contains fluorocarbon compounds in an amount of less than 0.05% by weight, and wherein the oil resistant article has a Gurley permeability of less than about 50,000 s/100 mL and greater than about 3,000 s/100 mL.
2 . An oil resistant article as defined in claim 1 , wherein the pulp fibers contained in the basesheet have a degree of refining of greater than about 70° SR.
3 . An oil resistant article as defined in claim 1 , wherein the basesheet contains hardwood fibers in an amount of about 80% by weight or more.
4 . An oil resistant article as defined in claim 1 , wherein the oil resistant coating comprises a sodium salt of a carboxymethyl cellulose.
5 . An oil resistant article as defined in claim 1 , wherein the oil resistant coating comprises from about 0.01% to about 10% by weight of the oil resistant article.
6 . An oil resistant article as defined in claim 1 , wherein the basesheet further comprises a binder.
7 . An oil resistant article as defined in claim 6 , wherein the binder comprises a second carboxymethyl cellulose, a starch or mixtures thereof.
8 . An oil resistant article as defined in claim 7 , wherein the binder comprises the second carboxymethyl cellulose.
9 . An oil resistant article as defined in claim 1 , wherein the basesheet further comprises a sizing agent.
10 . An oil resistant article as defined in claim 9 , wherein the sizing agent comprises an alkyl ketene dimer.
11 . An oil resistant article as defined in claim 1 , wherein the basesheet has an uncoated, inherent Gurley permeability of from about 1,000 s/100 mL to about 3,000 s/100 mL.
12 . An oil resistant article as defined in claim 1 , wherein the oil resistant article includes an oil resistant coating on the first side of the basesheet and an oil resistant coating on the second side of the basesheet.
13 . An oil resistant article as defined in claim 1 , wherein the basesheet does not contain filler particles.
14 . An oil resistant article as defined in claim 1 , wherein the oil resistant coating does not contain filler particles.
15 . An oil resistant article as defined in claim 1 , wherein the article consists of the basesheet and one or more oil resistant coatings.
16 . An oil resistant article as defined in claim 1 , wherein the article displays a Kit oil rating of greater than about 8 and less than 12.
17 . An oil resistant article as defined in claim 1 , wherein the oil resistant article is silicone free.
18 . An oil resistant article as defined in claim 1 , wherein the pulp fibers contained in the basesheet comprise at least about 95% by weight hardwood fibers.
19 . An oil resistant article as defined in claim 1 , wherein the oil resistant article has been calendered.
20 . An oil resistant article as defined in claim 4 , wherein the oil resistant coating is impregnated into the basesheet.