Method for preparing food packaging paper from hemp core stalk chlorine-free bleached pulp
A food wrapping paper, completely chlorine-free technology, applied in wrapping paper, wrapping paper, packaging, etc., can solve the problems of large strength loss, viscosity drop, etc., and achieve the effects of light wastewater pollution, mild oxidation, and strong process adaptability
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
Embodiment 1
[0023] Embodiment 1: the method that this hemp core stalk TCF bleached pulp prepares ordinary food wrapping paper, the specific content is as follows:
[0024] In the embodiment, the hemp core stalk TCF bleached pulp is made of the hemp core stalk that has been stripped of the hemp skin as the raw material, which is a segmented xylem core material with a length of about 3-5 cm; Quinone cooking, the cooking conditions are: the liquid ratio is 1:4, the amount of alkali is 20% (calculated as NaOH), and anthraquinone with an absolute dry mass of 0.15% of the pulp is added, and the cooking pot is idling for 10min. ℃, then use 100min to rise to 165℃, and keep at 165℃ for 150min; decompose the raw materials into fibers by cooking, put them in a 300-mesh nylon mesh pulp bag, wash with water until the washing water becomes clear and no foam, and then sieve the pulp The machine screens the pulp fibers, extracts the fiber raw materials for bleaching, and enters the bleaching process. The...
Embodiment 2
[0036] Embodiment 2: the method for preparing ordinary food wrapping paper by this hemp core stalk TCF bleached pulp, the specific contents are as follows:
[0037] In the embodiment, the hemp core stalk TCF bleached pulp is made of the hemp core stalk that has been stripped of the hemp skin as a raw material, and is a segmented xylem core material with a length of about 3 to 5 cm; Cooking, the cooking conditions are: the liquid ratio is 1:4, the amount of alkali used is 20% (calculated as NaOH), and the sulfurization degree is 22%. , and incubated at 165 °C for 150 min. The raw materials are decomposed into fibers by cooking, and then placed in a 300-mesh nylon mesh pulp bag, washed with water until the washing water becomes clear and no foam, and then the pulp fibers are screened with a pulp screener to extract the fiber raw materials for bleaching and enter the bleaching process. process, the steps are as follows:
[0038] (1) Oxygen delignification: In pulp with a pulp c...
Embodiment 3
[0049] Embodiment 3: the method that this hemp core stalk TCF bleached pulp prepares ordinary food wrapping paper, the specific content is as follows:
[0050] In the embodiment, the hemp core stalk TCF bleached pulp is made of the hemp core stalk that has been stripped of the hemp skin as a raw material, and is a segmented xylem core material with a length of about 3 to 5 cm; The cooking conditions are: liquid ratio 1:4, adding 19% ammonium sulfite, 5% urea and 0.2% anthraquinone by absolute dry mass of the pulp, and the cooking pot is idling for 10 minutes and then rises from the initial temperature to 85 °C in 30 minutes. , then use 100min to rise to 150°C, and hold at 150°C for 45min, then use 30min to rise to 165°C, and hold at 165°C for 150min. The raw materials are decomposed into fibers by cooking, and then placed in a 300-mesh nylon mesh pulp bag, washed with water until the washing water becomes clear and no foam, and then the pulp fibers are screened with a pulp scr...
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More