High gloss and high bulk paper
View Patent ↗The invention teaches a method of manufacturing a high bulk, high gloss paperweb using a supercalender operation. A paperweb surface is coated with a plastic pigment. The paperweb is run through a multi-nip calender device wherein the nip load of the paperweb is maintained at a load of about 1,000 pounds per linear inch at each nip. The temperature of the hard rolls are about 450 degrees Farenheit or less.
1. A finished paper product formed by the method comprising the steps of:
coating at least one side of a paper substrate with a coating comprising a hollow particulate plastic pigment; and
passing the coated paper through a multi-nip calender device, wherein said calender device comprises at least three or more hard rolls and at least three or more soft rolls in an alternating arrangement, the interface between one hard roll and one soft roll forming a nip, wherein said calender device has at least five nips, each of said at least five nips applying a nip load on the coated base stock of about 1000 pounds per linear inch or less such that said nip load is substantially uniform at each nip with respect to others of said at least five nips, and wherein the surface temperature of each hard roll does not exceed about 450° F. to form a product having a TAPPI 75° gloss value of greater than 60 with a density range of about 15.5 pounds per ream per caliper point at a basis weight of about 150 pounds per ream to a density of about 20 pounds per ream per caliper point at a basis weight of about 50 pounds per ream.
2. A paper product comprising:
a hollow particulate plastic coating,
wherein said paper product has a basis weight ranging from about 50 lbs./ream to about 75 lbs./ream, a density of less than about 19 pounds per ream per caliper point and a TAPPI 75° gloss value of greater than 60.
3. A paper product comprising:
a hollow particulate plastic coating,
wherein said paper product has a basis weight ranging from about 75 lbs./ream to about 100 lbs./ream, a density of less than about 18.5 pounds per ream per caliper point and a TAPPI 75° gloss value of greater than 60.
4. A paper product comprising:
a hollow particulate plastic coating,
wherein said paper product has a basis weight ranging from about 100 lbs./ream to about 150 lbs./ream, a density of less than about 18 pounds per ream per caliper point and a TAPPI 75° gloss value of greater than 60.
5. The paper product of claim 4 having a density of less than about 17 pounds per ream per caliper point and a TAPPI 75° gloss value of about 65 to about 85, wherein the basis weight of the product is from about 110 lbs./ream to about 150 lbs./ream.
6. A paper product comprising:
a hollow particulate plastic coating,
wherein said paper product has a density of from about 15.5 pounds per ream per caliper point to about 16.3 pounds per ream per caliper point and a TAPPI 75° gloss value of from about 60 to about 90.