CN101407702A

CN101407702A - Novel preparation of starch adhesive for producing corrugated cardboard

Info

Publication number: CN101407702A
Application number: CNA2008101615328A
Authority: CN
Inventors: 邹静中
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-10-12
Filing date: 2008-09-22
Publication date: 2009-04-15

Abstract

The invention belongs to a new method for preparing a starch adhesive used for corrugated board production. The method changes fundamentally conventional technology and raw materials, adopts wheat flour which has low lost and broad sources to substitute conventional starch or oxidized starch and combines combining oxidation technology of peroxide and high-efficiency catalysts to improve bonding property of the adhesive. The adhesive has the advantages of low cost, broad sources, high drying rate, strong initial adhesion, simple process and low energy consumption and the like and can be widely used for continuous production lines and also can be used for semi-continuous or single-machine production of adhesives used for production of corrugated boards or other paper products.

Description

Novel preparation of starch adhesive for producing corrugated cardboard

The invention belongs to a kind of novel preparation of starch adhesive for producing corrugated cardboard.

Present domestic corrugated board production mainly contains three types.A kind of is corrugated cardboard continous way production line, and used tackiness agent belongs to the living amylan mixing portion carrier glue of gelatinization, and the gluing cardboard is through hot pressing gelatinization moulding.Plant in addition is that the unit that small-sized carton factory generally adopts is produced corrugated cardboard.Used glue is better adhesiveproperties of having of gelatinization and mobile starch adhesive, colds pressing through the seasoning moulding.The semi continuous production that the third is made up of single-side machine.Used glue is identical with glue with unit production.Three types of its common ground are that main raw material all adopts starch or Sumstar 190, have all that the starch consumption is big, price is high, cost height, production technique relative complex, shortcomings such as energy consumption height, unstable properties.

The present invention seeks to fundamentally to change traditional technology and raw material, and, reduce cost, reduce oxidizing temperature, improve oxidation efficiency, simplify technology, cut down the consumption of energy and significantly improve the purpose of tackiness agent adhesiveproperties thereby reach significantly by the innovation oxidation technology.

Technical solution of the present invention and innovative point are to adopt cheaply, and the whole meal flour of wide material sources replaces starch or Sumstar 190, and whole meal flour has the molecular weight height, and gelatinization point is low, hardness and bonding strength height, advantage such as cost is low, the source is wide.Shortcoming is to be difficult for disperseing, and is difficult for oxidation, and flowability and sizability are poor slightly.The present invention adopts the combination of hydrogen peroxide and effective catalyst through innovation conventional oxidation technology and technology, has improved oxidation efficiency, reduced oxidizing temperature, improve the flowability and the sizability of glue, also improved initial bonding strength and bonding strength, rate of drying and the stability of glue.Prepare the starch based tackiness agent thereby make whole meal flour substitute starch or Sumstar 190 comprehensively, can be used for various types of production or other various production of paper products practically.One, corrugated cardboard continous way production line is with glue prescription (by mass percentage): flour 14%--25%, and effective catalyst is an amount of, and hydrogen peroxide is an amount of, sodium hydroxide 0.5%--0.9%, borax 0-1%, stablizer is an amount of, water 75%--85%.About oxidizing temperature 30 degree, add hydrogen peroxide as light in this prescription, do not add efficient catalyzer, then must improve more than Heating temperature to 50 degree, and need to increase the hydrogen peroxide consumption.Streamline of the present invention can be used single stage method production, also available two-step approach production with glue.A, one-step method production process is the water that adds formula ratio earlier in jar, be heated to 30 degree, after adding flour also fully is uniformly dispersed in stirring then, add effective catalyst, hydrogen peroxide, the back gradation that stirs adds sodium hydroxide solution, in the 30-35 degree, about oxidation 15-30 minute, add borax soln and stablizer according to the viscosity situation.B, two-step approach (carrier element method) production technique is to produce carrier glue and main gel respectively, mixes then to use after reaching regulation viscosity.Wherein carrier glue flour consumption accounts for the 15-30% of flour total amount, and effective catalyst, hydrogen peroxide, sodium hydroxide etc. all add in stirring in the carrier tank, and oxidizing temperature keeps 30-35 degree, oxidization time 15-30 minute.The suitable back of viscosity adds stablizer.Remaining flour and borax add in the main body jar, insulation 30-35 degree.At last the carrier glue that makes is added in the main gel, the abundant stirring all practised, and treats that the suitable back of viscosity adds the stablizer stirring and got final product in about 15 minutes.Two, unit is filled a prescription with glue: flour 8%-35%, and effective catalyst is an amount of, and hydrogen peroxide is an amount of, sodium hydroxide 0.6%-1.3%, borax 0.2%-1%, stablizer is an amount of, water 65%-90%.Oxidizing temperature 25-35 degree oxidization time 0.5-2 hour, is determined raw material consumptions such as flour according to different purposes.

Tackiness agent of the present invention is compared with the starch adhesive that generally uses at present, and it is low to have a cost, and production technique is simple, bonding strength and hardness height, and good stability, rate of drying is fast, the low remarkable advantage that waits of energy consumption.

Embodiment 1, streamline production adds 360 kilograms in water earlier with glue (two-step approach): a, carrier glue in carrier tank, be heated to 30 degree, beginning adds 50 kilograms in flour in stirring, after fully being uniformly dispersed, it is an amount of and stir to add efficient catalyzer, adds hydrogen peroxide again and stirs in right amount, to add total amount be 7 kilograms 20 kilograms of aqueous sodium hydroxide solutions in gradation then, insulation 30-35 degree stirs about about 20 minutes of oxidation, reaches that to add stablizer after the appropriate viscosity an amount of.B, main gel: in the main body jar, add 400 kilograms in water, being heated to for 30 degree beginnings adds 150 kilograms in flour in stirring, after fully being uniformly dispersed, add 20 kilograms of the aqueous solution of 3 kilograms of boraxes, the carrier glue that at last the first step is made slowly adds in the main gel in stirring, fully mixes.Also can according to circumstances add flowing agent or tackify thickening material and sanitas etc. this moment.Can use after reaching regulation viscosity.This glue gel temperature is lower than 57 degree, and initial bonding strength is strong, the bonding strength height, and materials are few, cost is low.

Embodiment 2, streamline are with glue (single stage method): add 700 kilograms in water in jar, be heated to 33 degree, the beginning adds 200 kilograms in flour in stirring, after abundant dispersed with stirring is even, add an amount of effective catalyst, it is an amount of to add hydrogen peroxide after stirring again, after stirring again gradation add 20 kilograms of the aqueous solution containing 7 kilograms in sodium hydroxide, stirred about 30 minutes, after reaching appropriate viscosity, add 20 kilograms of the aqueous solution of 3 kilograms of boraxes, continue to stir, it is an amount of to add stablizer at last.

Embodiment 3, unit glue: in jar, add 800 kilograms in water, be heated to 30 degree, the beginning adds 160 kilograms in flour in stirring, after abundant dispersed with stirring is even, it is an amount of and stir that beginning adds efficient catalyzer, it is an amount of and stir to add hydrogen peroxide again, and gradation adds 20 kilograms of the aqueous solution that contain 10 kilograms in sodium hydroxide, insulation 30-35 degree, stirred 0.5-1 hour, add 20 kilograms of the aqueous solution of 3 kilograms of boraxes when viscosity is suitable, stirs, it is an amount of to add stablizer again after the skewer viscosimetric is up to standard.This glue look shallow is transparent, good fluidity, and initial bonding strength is strong, and rate of drying is fast, and the bonding strength height is fit to unit or semi continuous corrugated board production.

Claims

Novel preparation of starch adhesive for producing corrugated cardboard, it is characterized in that replacing traditional starch or Sumstar 190 with whole meal flour, and in conjunction with hydrogen peroxide and effective catalyst combination oxidation technology, improved oxidation efficiency, reduced oxidizing temperature, improved the adhesiveproperties of tackiness agent, make cheap whole meal flour substitute starch or Sumstar 190 comprehensively, can be actually used in the continous way production line, unit or semi continuous are produced corrugated cardboard and other production of paper products, being used for streamline production is (by mass percentage) with the glue prescription: flour 14%-25%, effective catalyst is an amount of, hydrogen peroxide is an amount of, sodium hydroxide 0.5%-0.9%, borax 0-1%, stablizer is an amount of, water 75%-85%, but this glue two-step approach production (carrier element method), but also single stage method production, wherein two-step approach production, carrier glue flour consumption accounts for the 15%-30% of flour total amount, oxidizing temperature 30-35 degree, oxidization time 10-30 minute, borax can be added in the main body jar, also can be added in the carrier glue, and unit with the glue prescription is: flour 8%-35%, effective catalyst is an amount of, hydrogen peroxide is an amount of, sodium hydroxide 0.6%-1.3%, borax 0.2%-1%, stablizer is an amount of, water 65%-90%, oxidizing temperature 25-35 degree, oxidization time 0.5-2 hour, according to different purposes, select to determine the raw material consumption.