Method of controlling tackiness in papermaking
To reduce the problem of tackiness caused by contaminants in recycled paper, effective amounts of talc and a terpene such as D-limonene are added to paper stock in conjunction with chemical fixing agents and retention aids. The terpene increases the affinity of the contaminants for the talc, thus increasing detackification of the contaminants and improving the productivity of the papermaking process.
1. In a method of making paper from raw materials containing contaminants that use talc or bentonite as an additive to detackify contaminants in paper stock, the improvement comprising adding effective amounts of a terpene to increase affinity of the contaminants to the talc or bentonite.
2. The method of claim 1 , wherein the terpene is one or D-limonene or turpentine oil.
3. The method of claim 1 , wherein a chemical fixing agent is added either before or after addition of the terpene, the chemical fixing agent added in an effective amount to fix the contaminants and the talc or bentonite to fibers and fines in the paper stock.
4. The method of claim 3 , wherein an effective amount of one or more retention aids are added during the papermaking method, addition of the retention aid following the steps of adding the talc or bentonite, terpene, and chemical fixing agent.
5. The method of claim 1 , wherein the chemical fixing agent is added prior to addition of the terpene.
6. The method of claim 4 , wherein the chemical fixing agent is added after addition of the terpene.
7. The method of claim 3 , wherein the chemical fixing agent is added prior to addition of the terpene.
8. The method of claim 3 , wherein the chemical fixing agent is added after addition of the terpene.
9. The method of claim 1 , wherein an effective amount of a retention aid is added during the papermaking method, addition of the retention aid following the steps of adding the talc or bentonite and terpene.
10. The method of claim 1 , wherein the method of making paper uses substantially all recycled paper as raw material.