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US 8,940,135 B2Granted
Production of filled paper using biodegradable polyester fibers and/or polyalkylene carbonate fibers
AssigneeBASF SE
InventorsGabriel Skupin, Rainer Blum
Life of this patent
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Abstract
The present invention relates to a process for producing filled paper, card and board comprising dewatering a paper stock with sheet formation and drying, wherein biodegradable polyester fibers and/or polyalkylene carbonate fibers are added to the paper stock.
Claims36
A process for producing filled paper, card, or board, the process comprising:
- dewatering a paper stock with sheet formation and drying,
- wherein biodegradable polyester fibers and a filler are added to the paper stock, wherein the polyester fibers are at least one aliphatic polyester selected from the group consisting of polybutylene succinate (PBS), polybutylene succinate adipate (PBSA), polybutylene succinate sebacate (PBSSe) and polybutylene sebacate (PBSe), and
- wherein the filler content of the paper, card, or board is in the range from 10 to 50 wt %, based on the paper, card, or board.
A process for producing filled paper, card, or board, the process comprising:
- dewatering a paper stock with sheet formation and drying,
- wherein biodegradable polyester fibers and/or polyalkylene carbonate fibers and a filler are added to the paper stock,
- wherein the filler content of the paper, card, or board is in the range from 10 to 50 wt %, based on the paper, card, or bard, and
- wherein the biodegradable polyester fibers are of a mixture consisting of:
- from 5 to 50 wt % of at least one selected from the group consisting of polybutylene adipate terephthalate (PBAT), polybutylene sebacate terephthalate (PBSeT) polybutylene succinate (PBS), polybutylene succinate adipate (PBSA), and polybutylene succinate sebacate (PBSSe);
- and 50 to 95 wt % of polylactic acid.
3 more elements
A process for producing filled paper, card, or board, the process comprising:
- dewatering a paper stock with sheet formation and drying,
- wherein biodegradable polyalkylene carbonate fibers and a filler are added to the paper stock, and
- wherein the filler content of the paper, card, or board is in the range from 10 to 50 wt %, based on the paper, card, or board.
A process for producing filled paper, card, or board, the process comprising:
- dewatering a paper stock with sheet formation and drying,
- wherein biodegradable polyester fibers and polyalkylene carbonate fibers and a filler are added to the paper stock, and
- wherein the filler content of the paper, card, or board is in the range from 10 to 50 wt %, based on the paper, card, or board.
Dependencies are inferred from the claim text.