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Preparation method of biologically modified wet strength agent

A technology of biological modification and wet strength agent, applied in the direction of addition of enhancers, can solve the problems of small environmental pollution, difficult to peel off the paper, poor uniformity of paper sheets, etc., and achieve the effect of improving wet strength.

Inactive Publication Date: 2016-05-04
梅庆波
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem mainly solved by the present invention: aiming at current traditional papermaking wet strength agents such as urea-formaldehyde resin (UF), melamine-formaldehyde resin (MF) will release harmful substances under the conditions of use, and it is easy to generate air bubbles and flocculation when applied in papermaking, It is difficult to make paper and peel it off, the uniformity of paper is poor, and it is easy to mold if it contains moisture. A preparation method of biologically modified wet strength agent is provided. The invention uses coral reef and polyamide polyepichlorohydrin resin as raw materials to obtain Coral reef particles are fermented to obtain a fermentation broth, separated, extracted, concentrated, and dried to obtain a biomodified powder, and then reacted with sodium dodecylbenzenesulfonate and oxalic acid to obtain a modified prepolymer polyamide solution, and Epichlorohydrin reaction finally obtains bio-modified wet strength agent. The invention adds polyamide polyamine epichlorohydrin resin moisturizing component, which not only has good wet strength effect but also has little environmental pollution and no toxic effect. It is obtained from coral reef fermentation products It can be separated and added with a biologically active substance to increase the wet strength without losing the softness and absorbency of the paper, and prevent the problem that the paper is prone to mold due to moisture. After adding the wet strength agent, it can Make the paper keep 30-50% of its original dry strength after wetting

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0018] First get 800g coral reef, put into pulverizer and pulverize, cross 20 mesh standard sieves, get coral reef powder, put gained powder in the container, add mass fraction wherein to it and be 3% sodium chloride solution to soak particle, then Add 50mL polyamide polyepichlorohydrin resin to it, stir evenly, then heat the container to 35°C, and keep the temperature for 5h; Particles, put the resulting screened coral reef particles into a fermenter with an inoculum size of 15%, then add nutrients thereto in an amount of 20% of the quality of the screened coral reef particles, mix evenly, and then keep the temperature of the fermenter at 28°C , the ventilation rate is 0.4 (V / V min), the rotation speed is set to 110r / min, and the fermentation is carried out for 10 days. Mix evenly; filter after the fermentation is over, collect the fermented liquid, put the obtained fermented liquid into a centrifuge, and centrifuge for 1 min at a speed of 5000r / min, collect the supernatant, ...

example 2

[0021]First get 850g coral reef, put into pulverizer and pulverize, cross 35 mesh standard sieves, get coral reef powder, the powder of gained is put into container, add mass fraction wherein to it and be that 3.5% sodium chloride solution soaks particle, and then Add 55mL of polyamide polyepichlorohydrin resin to it, stir evenly, then heat the container to 38°C, and keep the temperature for 8h; after the heat preservation is completed, filter under reduced pressure at a pressure of 100Pa, collect the filtrate, and obtain the screened coral reef Particles, put the resulting screened coral reef particles into a fermenter with an inoculum size of 17%, then add nutrients thereto in an amount of 25% of the quality of the screened coral reef particles, mix well, and then keep the temperature of the fermenter at 32°C , the ventilation rate is 0.5 (V / V min), the rotation speed is set at 120r / min, and the fermentation is carried out for 13 days. Mix evenly; filter after the fermentati...

example 3

[0024] First get 900g coral reef, put into pulverizer and pulverize, cross 50 mesh standard sieves, get coral reef powder, put the powder of gained into the container, add massfraction wherein to it and be 4% sodium chloride solution to soak granule, then Add 60mL of polyamide polyepichlorohydrin resin to it, stir evenly, then heat the container to 40°C, and keep the temperature for 10h; after the heat preservation is over, filter under reduced pressure at a pressure of 110Pa, collect the filtrate, and obtain the screened coral reef Particles, put the resulting screened coral reef particles into a fermenter, the inoculation amount is 30%, and then add nutrients to it, the addition amount is 30% of the mass of the screened coral reef particles, mix evenly, and then keep the temperature of the fermenter at 35°C , the ventilation volume is 0.6 (V / V min), the rotation speed is set at 130r / min, and the fermentation is carried out for 15 days. Mix evenly; filter after the fermentati...

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PUM

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Abstract

The invention discloses a preparation method of a biologically modified wet strength agent, and belongs to the field of wet strength agents. The preparation method comprises the following steps: preparing coral reef particles from coral reef and polyamide-poly(epoxy chloropropane) resin; fermenting coral reef particles to obtain fermentation broth; carrying out separation, extraction, concentration, and drying to obtain biologically modified powder, reacting the biologically modified powder with sodium dodecyl benzene sulfonate and oxalic acid to obtain a prepolymer polyamide solution, and finally reacting the prepolymer polyamide solution with epoxy chloropropane to obtain the biologically modified wet strength agent. The added polyamide-poly(epoxy chloropropane) resin is taken as the wetting component, has a good wet strengthening effect, is little pollutant to the environment, and is nontoxic and harmless. A bioactive substance, which can be separated from the fermentation product of coral reef, is added into the wet strength agent. The provided wet strength agent can improve the wet strength degree of paper, at the same time, the softness and absorbing performance of paper are not degraded; the problem that the paper becomes moldy due to water in the paper is solved; and the strength of the paper is 30 to 50% of original dry strength, after the wet strength agent is added.

Description

technical field [0001] The invention discloses a preparation method of a biologically modified wet strength agent, belonging to the field of wet strength agents. Background technique [0002] The wet strength of paper refers to the strength of a paper sheet when exposed to water or in a humid environment. Many paper products, especially industrial paper, require high wet strength, and the addition of wet strength agents can improve the wet strength of paper under wet conditions. Under normal circumstances, when no additives are added, the wet strength of the paper is only 5-10% of the dry strength. After adding the wet strength agent, the paper can mostly maintain the original dry strength of 20-40%. Paper wet strength agents can be divided into two types: permanent and temporary. Temporary paper wet strength agents are mostly used in paper products that are short-term and discarded after use; permanent paper wet strength agents are usually used in corrugated cardboard and ...

Claims

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Application Information

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IPC IPC(8): D21H21/20C08G69/48
CPCD21H21/20C08G69/48
Inventor 梅庆波王志慧宋国
Owner 梅庆波