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Polyamide-epichlorohydrin resin cylinder adhesive

A technology of epichlorohydrin and polyamide, applied in the field of polyamide-epichlorohydrin resin sticking agent, can solve the problems of tearing, tearing, paper jamming, etc., and achieve the effects of stable performance and simple process flow

Inactive Publication Date: 2008-08-06
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the adhesive force is too small, the paper sheet will peel off the cylinder surface before the creping blade reaches; Paper
[0006] Aiming at the defects of the prior art, the present invention provides a cylinder sticking agent, which considers the difference between the adhesive force and the cohesive force of the paper, and when it is put into use, it can greatly improve the phenomenon of uneven wrinkling and paper tearing during the wrinkling process

Method used

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  • Polyamide-epichlorohydrin resin cylinder adhesive
  • Polyamide-epichlorohydrin resin cylinder adhesive
  • Polyamide-epichlorohydrin resin cylinder adhesive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Embodiment 1: with diethylenetriamine 1mol, diethyl malonate 0.9mol, solvent-free, add catalyst lipase Novozyme435, its consumption is 1% of diethylenetriamine and diethyl malonate gross mass, generally N 2 , Stir the reaction at 45°C for 6 hours to obtain a yellow-white solid prepolymer. Add water to dissolve, so that the concentration of the solution is 30%, and filter off the catalyst. Adjust the pH to 10-11 with 25% ammonia water, and add a small amount of stabilizer phosphorous acid 1.64g. 0.35 mol of epichlorohydrin is added dropwise into the prepolymer aqueous solution, and the reaction is controlled at 65° C. until the viscosity reaches 10 to 200 cps measured by the Brookfield method. Cooling with 50% sulfuric acid to adjust pH=4.0 to obtain polyamide-epichlorohydrin resin tank adhesive.

Embodiment 2

[0054] Embodiment 2: triethylenetetramine 1mol, diethyl succinate 0.95mol, solvent-free, add Novozyme4355% (reactant raw material mass ratio), logical N 2 , Stir the reaction at 50°C for 6hr to obtain a white solid prepolymer. Add water to dissolve, so that the concentration of the solution is 25%, and filter off the catalyst. Adjust pH=10-11, add a small amount of stabilizer ammonium hypophosphite 0.83g. 0.25 mol of epichlorohydrin is added dropwise into the prepolymer aqueous solution, and the reaction is controlled at 70° C. until the viscosity reaches 10 to 200 cps measured by the Brookfield method. Cool to adjust pH=4.0, pack.

Embodiment 3

[0055] Embodiment 3: with diethylenetriamine 1mol, diethyl malonate 0.95mol, add 3ml water, catalyzer lipase Novozyme435, its consumption is 1% of diethylenetriamine and diethyl malonate gross mass, generally N 2, Stir the reaction at 45°C for 6 hours to obtain a yellow-white solid prepolymer. Add water to dissolve, so that the concentration of the solution is 30%, and filter off the catalyst. Adjust the pH to 10-11 with 25% ammonia water. 0.30 mol of epichlorohydrin is added dropwise into the prepolymer aqueous solution, and the reaction is controlled at 65° C. until the viscosity reaches 10 to 200 cps measured by the Brookfield method. Cooling with 50% sulfuric acid to adjust pH=4.0 to obtain polyamide-epichlorohydrin resin tank adhesive.

[0056] Obtain the following table of polymer resin ionic strength through using potentiometric titration (aided by ion-selective electrode assay method):

[0057] Example 1

[0058] Table 1 formula of the present invention...

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Abstract

The invention relates to polyamide-epichlorohydrin resin sticking cylinder agent, which is used for a crinkling technique in producing tissue paper. The method of the invention comprises: taking polyamine and secondary lipid as raw materials, taking water, carbinol and ethanol as dissolvant (or not adding the dissolvent), adding little amount of activator for catalyze reaction to generate polyamide prepolymer, then, reacting with the epichlorohydrin under certain acidity-alkalinity and under the condition that stabilizing agent is existed and the temperature is 60-80DEG C, generating polyamide-epichlorohydrin resin, adjusting the pH value, cooling and discharging materials, and obtaining the polyamide-epichlorohydrin resin sticking cylinder agent. The sticking cylinder agent product of the invention has stable performance and can improve the crinkling unevenness in the crinkling technique and paper cutting phenomenon in the crinkling process when in use.

Description

technical field [0001] The invention relates to a polyamide-epichlorohydrin resin cylinder sticking agent, which is used for the crepe process in the production of household paper, and belongs to the field of wet-end additives for auxiliary agents in the papermaking industry. Background technique [0002] The creping process is generally used in tissue paper production. The wrinkling method in the wrinkling process can be divided into wet wrinkling, semi-dry wrinkling and dry wrinkling. Most of the paper machines that produce crepe paper in my country use dry creping. It is a method for paper sheets to leave the cylinder surface after being wrinkled with a scraper on the surface of the drying cylinder (usually a Yankee drying cylinder) when the paper sheet is dried on the drying cylinder to a dryness of more than 90%. [0003] The function of the creping process is to peel the paper web from the surface of the dryer, and the second is to break the fiber bonds of the paper ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H21/06
Inventor 赵敏唐灵陈建中方向
Owner EAST CHINA UNIV OF SCI & TECH
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