CN1128781A - Maize starch adhesive agent and prepn. method thereof - Google Patents

Abstract

The corn amylum is oxidized using potassium permanganate in treatment liquid. Obtained amylum oxide is pasted with higher concentration alkali lye, then adding borax, the corn amylum adhesives is prepd.. Advantages are: needing no heating, needing no drying device and suited to adhesion of various papery products.

Description

Corn starch adhesive agent and preparation method thereof

The present invention relates to paper articles for use tackiness agent, particularly a kind of corn starch adhesive agent and preparation method thereof.

Corn starch adhesive agent is the tackiness agent that mainly applies to carton and paper product industries, the preparation method of existing corn starch adhesive agent is W-Gum and other compositions to be carried out chemical reaction 50-70 ℃ the time obtain, production must be carried out in the equipment that can heat the weighing apparatus temperature, brings difficulty for some small-sized manufacturer production.At present, minority unit is arranged with cold process production or trial-production corn tackiness agent, the cold method of completing the square that one piece of " research and development of natural products " March in 1992 proposes in " corrugated cardboard with the discussion of Starch Adhesive manufacture method " by name (author: wear clothes and manage) literary composition, long reaction time, need more than 20 hour, operational quality control is inconvenient, and the gum yield of unit starch is low, and quality is also unstable.

Purpose of the present invention will provide a kind of corn starch adhesive agent and manufacture method thereof exactly, and it can overcome above-mentioned defective of the prior art effectively, and need not thermal source in preparation process.

The object of the present invention is achieved like this: it comprises that 2 parts of water of 0.09-0.12 part of treatment solution of (weight is represented with parts by weight) W-Gum 0.012-0.02 part of sodium hydroxide of 0.01-0.02 part of potassium permanganate of 1 part of borax can also add additive for 3-9 parts in above-mentioned component, and its parts by weight are less than 0.02 part.Treatment solution is that concentration is the sodium hydroxide solution of 30-50ppm, and additive is a defoamer, also can be sanitas.Defoamer is tributyl phosphate, ethanol, and sanitas is a formaldehyde, other food preservatives.

The method for preparing corn starch adhesive agent is:

A) preparation of solution: it is 1.5-2.5% borax soln that 0.01-0.02 part of borax is mixed with concentration, it is 1-4% potassium permanganate solution that 0.012-0.02 part of potassium permanganate is mixed with concentration, it is 6-20% sodium hydroxide solution that 0.09-0.12 part of sodium hydroxide is mixed with concentration, and above-mentioned institute joins the solution with water amount and takes in 3-9 parts of Total Waters;

B) preprocessing process: get 2 parts of treatment solutions, 1 part of W-Gum is poured in the reactor and was stirred 10 minutes, leaves standstill then 1-1.5 hours, filters out supernatant liquid with 100-300 mesh sieves;

C) solubilizing agent process: in reactor, be added in 3-9 parts of the Total Waters remaining water after the obtain solution consumption, stir;

D) oxidising process: in reactor, add the potassium permanganate solution of concentration 1-4%, stirred 5-15 minutes;

E) gelation with separate gelation process: add concentration in the stirring and be 1-20% sodium hydroxide solution, stop to stir when solution becomes gel, left standstill 1-1.5 hours, gel promptly becomes solution;

F) complexing process: after gel became solution fully in reactor, restir added concentration and is 1.5-2.5% borax soln simultaneously, react got final product in 10-15 minutes finished product.

Above-mentioned each reaction is all carried out under natural temperature, pressure, and stirring velocity is 10-80 rev/mins.If stirring, reaction have the foam generation can add defoamer or sanitas.

The present invention has following positively effect:

(1) can preserve under the long quality-guarantee period, sealed state more than 3-6 months, uncovered placement still can normally be used in 5 days, and corn starch adhesive agent is directly supplied to the user with product form.

(2) rate of drying is fast, and initial viscosity (10 minutes) is more than 95%, and during Corrugated Box was produced, the bonding back can enter next procedure in 2-3 hours, can reach to replace the technical requirements of tradition with Corrugated Box tackiness agent water glass.

(3) the glue amount is big, but 5-10 parts of every part of W-Gum glues in Corrugated Box is produced, generally can be made 8-10 parts of corn tackiness agents, increase by 2/3 to 1 times than prior art glue amount (4-6 parts).Greatly reduce the glue cost.

(4) equipment is few, and technology is simple, and it is remarkable that each goes on foot response feature, very easily carries out quality control, does not need thermal source, easily is that general factory and technician grasp, produce, and is with short production cycle, was generally 2.5-4 hours.

(5) bond strength height, moisture resistivity is good.After bonding, bond strength is greater than the paper stripping strength, and the corrugated cardboard after the bonding through the immersion test, does not come unglued.

(6) purposes is wide.Product of the present invention except in Corrugated Box is produced, using, this corn starch adhesive agent also can paper bag production, label paste and the daily life paper product in bonding use, and can in the paper of package paper, make surperficial treatment agent.

Embodiment:

Corn starch adhesive agent prescription (weight is represented with kilogram) W-Gum 100 borax 1 potassium permanganate, 1.2 sodium hydroxide, 10 treatment solutions (40ppm sodium hydroxide solution) 200 water 580-630

Preparation process:

A) preparation of solution: it is 2% borax soln 50Kg that the 1Kg borax is mixed with concentration, water 49Kg, it is 3% potassium permanganate solution 40Kg that 1.2Kg potassium permanganate is mixed with concentration, water 38.8Kg, it is 10% sodium hydroxide solution 100Kg that 10Kg sodium hydroxide is mixed with concentration, water 90Kg.

B) preprocessing process: get sodium hydroxide solution, the 100Kg W-Gum of 200Kg40ppm, pour in the reactor and stirred 10 minutes, left standstill then 1-1.5 hours, filter out supernatant liquid with 250 mesh sieves;

C) solubilizing agent process: remaining water 400-450Kg after the consumption of adding obtain solution in reactor stirs;

D) oxidising process: the potassium permanganate solution 40Kg of adding 3% in reactor, stirred 5-15 minutes;

E) gelation with separate gelation process: add 10% sodium hydroxide solution 100Kg in the stirring, stop to stir when solution becomes gel, left standstill 1-1.5 hours, gel promptly becomes solution;

F) complexing process: after gel became solution fully in reactor, restir added 2% borax soln 50Kg simultaneously, react got final product in 10-15 minutes finished product.

Above-mentioned each reaction is all carried out under natural temperature, pressure, and stirring velocity is 10-80 rev/mins.

Claims (8)

1, a kind of corn starch adhesive agent, it comprises (weight is represented with parts by weight): 3-9 parts in 2 parts of water of 0.09-0.12 part of treatment solution of W-Gum 0.012-0.02 part of sodium hydroxide of 0.01-0.02 part of potassium permanganate of 1 part of borax

2, corn starch adhesive agent according to claim 1 is characterized in that: can also add additive in its component constitutes, its parts by weight are less than 0.02 part.

3, corn starch adhesive agent according to claim 1 is characterized in that: treatment solution is that concentration is the sodium hydroxide solution of 30-50ppm.

4, corn starch adhesive agent according to claim 1 and 2 is characterized in that: additive is a defoamer.

5, corn starch adhesive agent according to claim 1 and 2 is characterized in that: additive is a sanitas.

6, according to claim 1,2 or 4 described corn starch adhesive agents, it is characterized in that: defoamer is tributyl phosphate, ethanol.

7, according to claim 1,2 or 5 described corn starch adhesive agents, it is characterized in that: sanitas is formaldehyde, other food preservatives.

8, prepare the method for the described corn starch adhesive agent of claim 1, it is characterized in that:

A) preparation of solution: it is 1.5-2.5% borax soln that 0.01-0.02 part of borax is mixed with concentration, it is 1-4% potassium permanganate solution that 0.012-0.02 part of potassium permanganate is mixed with concentration, it is 6-20% sodium hydroxide solution that 0.09-0.12 part of sodium hydroxide is mixed with concentration, and above-mentioned institute joins the solution with water amount and takes in 3-9 parts of Total Waters;

B) preprocessing process: get 2 parts of treatment solutions, 1 part of W-Gum is poured in the reactor and was stirred 10 minutes, leaves standstill then 1-1.5 hours, filters out supernatant liquid with 100-300 mesh sieves;

C) solubilizing agent process: in reactor, be added in 3-9 parts of the Total Waters remaining water after the obtain solution consumption, stir;

D) oxidising process: in reactor, add the potassium permanganate solution of concentration 1-4%, stirred 5-15 minutes;

E) gelation with separate gelation process: add concentration in the stirring and be 1-20% sodium hydroxide solution, stop to stir when solution becomes gel, left standstill 1-1.5 hours, gel promptly becomes solution;

F) complexing process: after gel became solution fully in reactor, restir added concentration and is 1.5-2.5% borax soln simultaneously, react got final product in 10-15 minutes finished product.

Above-mentioned each reaction is all carried out under natural temperature, pressure, and stirring velocity is 10-80 rev/mins.