A kind of high-strength and high-softness crepe paper and its preparation method
A soft and high-strength technology, applied in the field of papermaking, can solve the problems of limited dry strength and easy damage of paper, and achieve the effects of high dry strength and softness, good antibacterial ability and softness
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Embodiment 1
[0054] A kind of high-strength and high-flexibility crepe paper is prepared through the following steps:
[0055] (1) Preparation of polyimino hyperbranched polymers:
[0056] (1.1) Synthesis: Under the protection of an inert gas, add the mixed solution of methyl acrylate and methanol dropwise to diethylenetriamine, wherein the molar ratio of diethylenetriamine to methyl acrylate is 1:2 , after reacting at 25°C for 3h, the methanol was distilled off under reduced pressure, then heated to 140°C, and reacted at 0.3kPa for 2h;
[0057] (1.2) Capping: Add diethylenetriamine and capped carboxylic acid at a molar ratio of 1:8 to the mixed solution obtained in step (1.1), continue to react at 140°C and 0.3kPa for 2h, and then pressurize Continue reaction to 0.07MPa, until acid value is reduced to below 30; Described end-capped carboxylic acid is n-butyric acid;
[0058] (2) Pulping: get 96 parts of needles, after the hydropulper is crushed and the fiber disintegrator is defiberized...
Embodiment 2
[0064] A kind of high-strength and high-flexibility crepe paper is prepared through the following steps:
[0065] (1) Preparation of polyimino hyperbranched polymers:
[0066] (1.1) Synthesis: Under the protection of an inert gas, add the mixed solution of methyl acrylate and methanol dropwise to diethylenetriamine, wherein the molar ratio of diethylenetriamine to methyl acrylate is 1:1 After reacting at 20°C for 4h, the methanol was distilled off under reduced pressure, then heated to 130°C, and reacted at 0.1kPa for 2.5h;
[0067] (1.2) Capping: Add diethylenetriamine and capped carboxylic acid at a molar ratio of 1:9 to the mixed solution obtained in step (1.1), continue to react at 130°C and 0.1kPa for 1.5h, and then add Press down to 0.06MPa to continue the reaction until the acid value drops below 30; the blocked carboxylic acid is n-hexanoic acid;
[0068] (2) Pulping: get 93 parts of needle leaves, after the hydropulper is crushed and the fiber disintegrating machine...
Embodiment 3
[0074] A kind of high-strength and high-flexibility crepe paper is prepared through the following steps:
[0075] (1) Preparation of polyimino hyperbranched polymers:
[0076] (1.1) Synthesis: Under the protection of an inert gas, the mixed solution of methyl acrylate and methanol is added dropwise to diethylenetriamine, wherein the molar ratio of diethylenetriamine to methyl acrylate is 1:1.5 After reacting at 25°C for 3h, the methanol was distilled off under reduced pressure, then heated to 150°C, and reacted at 0.5kPa for 1.5h;
[0077] (1.2) Capping: Add diethylenetriamine and capped carboxylic acid at a molar ratio of 1:10 to the mixed solution obtained in step (1.1), continue to react at 150°C and 0.5kPa for 1 hour, and then pressurize Continue reaction to 0.08MPa, until acid value is reduced to below 30; Described end-capped carboxylic acid is n-octanoic acid;
[0078] (2) Pulping: get 90 parts of needle leaves, after the hydropulper is crushed and the fiber disintegr...
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