CN1097449A

CN1097449A - Instant-drying composite gum made from starch

Info

Publication number: CN1097449A
Application number: CN 93111491
Authority: CN
Inventors: 文庭希; 陈拔群
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-07-10
Filing date: 1993-07-10
Publication date: 1995-01-18

Abstract

A kind of instant-drying composite gum made from starch, be particularly suitable for the corrugated cardboard that bonds, it is to add compound binding agent and the stirring heating oxidation in reactor of tricresyl phosphate tincture fat is composited by starch, and the raw material of amylan is that starch, sodium hydroxide, hydrogen peroxide, sodium tetraborate and water, compound binding agent are made by polyvinyl alcohol, formaldehyde, hydrochloric acid and water heating.

Technology of the present invention, equipment is simple, easy to make, raw material is easy to get, with low cost, shorten three times time of drying through experiment than general amylan, do not need special-purpose drying production line to get final product the Production and Packaging carton, can reduce glue spread 30%, humidity resistance is good, and the shelf lives is long, is suitable for big, medium-sized and small enterprises's production application.

Description

Instant-drying composite gum made from starch

The present invention relates to a kind of instant-drying composite gum made from starch, be specially adapted to the corrugated cardboard that bonds, belong to tackiness agent.

China's corrugated cardboard packaging industry, the binding agent that adopts has two kinds now: a kind of is alkaline binding agent water glass, be water glass again, its shortcoming be easy to the moisture absorption, the accumulation of salt in the surface soil, make the container weakness, flat splitting, thereby cause in the case that commodity are mouldy, go bad, get rusty and cause damage; A kind of is the amylan that just used in recent years, though be better than alkaline binding agent, because its water content is higher, time of drying is when long slightly, moisture content wherein permeates in paper, initial cohesiveness is reduced,, will make the papery deliquescing as untimely drying, therefore need set up drying production line, adopt microwave or Infrared Heating drying, carton cost height, complex process.

The purpose of this invention is to provide a kind of production unit is simple, making method easy, raw material is easy to get, its bonding speed is fast, cohesive strength is high, anchorage force is strong, ultimate compression strength is high, humidity resistance is good, glue spread is suitable for the instant-drying composite gum made from starch of packed in cases industry use less production method, equipment and product.

Realize that method of the present invention is: amylan adds the compound adding tricresyl phosphate of compound binding agent heated oxide tincture fat and forms, the raw material of amylan is: its starch can be corn, rice, flour etc., sodium hydroxide, hydrogen peroxide, sodium tetraborate and water, its weight ratio is: 12.32-18.48: 0.94-1.42: 0.19-0.29: 0.19-0.29: 80.2-85.68, in reactor, stir, and outside still, heat, after heated oxide becomes amylan, adding compound binding agent again carries out compound, compound binding agent consist of polyvinyl alcohol, formaldehyde, hydrochloric acid and water, its weight ratio is: 10: 5: 1: 84, be made through heating, the weight ratio of compound glue paste and amylan is 18.8: 100, and the tricresyl phosphate tincture fat that adds amylan amount 0.001% again stirs.

To be further elaborated by embodiments of the invention below:

Embodiment 1 is a most preferred embodiment, and its raw material weight per-cent is:

15.4 kilograms of Semen Maydis powder, 1.18 kilograms in sodium hydroxide, hydrogen peroxidase 10 .24 kilogram, 0.24 kilogram of sodium tetraborate, 82.94 kilograms in water, at first water is added reactor, start stirrer, and then powder is decided in adding respectively, sodium hydroxide, sodium peroxide, sodium tetraborate, beginning outside reactor heats again carries out oxidation, temperature is controlled at 65-75 ℃, kept about 90-150 minute, and in whipping process ceaselessly, constantly measure its viscosity and concentration, be as the criterion with the criterion of acceptability that reaches amylan, and then add by 10 kilograms of polyvinyl alcohol, 5 kilograms of formaldehyde, 1 kilogram of hydrochloric acid, 84 kg of water boil 18.48 kilograms of the compound binding agents that form through heating, its effect is to urge the universe, be that the universe gets soon, and increase the cohesiveness of amylan, it is 1: 9 water that compound binding agent need add weight, i.e. 166.32 kg of water dilution back adds in the reactor, stir after 10 minutes, the tricresyl phosphate tincture fat that adds amylan amount 0.001% again, stir the fast dry composite gum of faint yellow transparent thick liquid, the type of heating of reactor can be directly with fire, mode such as steam or electric heating device is carried out, the structure of reactor can be numerous can letter, the simplest and the crudest way can replace with iron pan, but necessary means whipping appts in it.

The raw material weight per-cent of example 2 is: 18.48 kilograms of rice meals, 0.94 kilogram in sodium hydroxide, hydrogen peroxidase 10 .19 kilogram, 0.19 kilogram of sodium tetraborate, 80.2 kilograms in water.

The raw material weight per-cent of example 3 is: 12.32 kilograms in flour, 1.42 kilograms in sodium hydroxide, hydrogen peroxidase 10 .29 kilogram, 0.29 kilogram of sodium tetraborate, 85.68 kilograms in water.

Example 2, example 3 are except that the proportioning difference of amylan, and other are all identical with example 1, no longer describe in detail.

From the above mentioned: technology of the present invention, equipment is simple, easy to make, raw material is easy to get, with low cost, shorten about 3 times time of drying than general amylan through experiment, do not need special-purpose drying production line to get final product the processing and packing carton, fluting board is difficult for infiltration, cohesive force is strong, can reduce glue spread about 30%, can arbitrarily move after pressurizeing at normal temperatures 10 minutes, can carry out second operation work after 4-6 hour, the good fluidity of glue, being fit to adhesive applicator uses, degree Beaume is between the 10-12 degree, alkalinity is humble, between 1-1.25%, humidity resistance is good, shelf lives is long, the carton quality can satisfy the requirement of country to standard export packages fully, is suitable for big, in, small business's production application.

Claims

1, a kind of instant-drying composite gum made from starch, it is characterized in that amylan adds the compound tricresyl phosphate tincture fat that adds again of compound binding agent heated oxide and forms, the raw material of amylan is starch, sodium hydroxide, hydrogen peroxide, sodium tetraborate and water, their weight ratio is 12.32-18.48: 0.94-1.42: 0.19-0.29: 0.19-0.29: 80.2-85.68, compound binding agent is made by polyvinyl alcohol, formaldehyde, hydrochloric acid and water heating, and its weight ratio is 10: 5: 1: 84.

2, a kind of production unit of instant-drying composite gum made from starch comprises reactor and heating installation, and it is characterized in that being equipped with in the reactor whipping appts, reactor has heating unit outward.

3, a kind of production method of instant-drying composite gum made from starch comprises heated oxide, compound, it is characterized in that at first water being added reactor, begin to stir and add starch, sodium hydroxide, hydrogen peroxide, sodium tetraborate then respectively, reheat is oxidized to 60-75 ℃ of about 90-150 minute, constantly stir and measure its viscosity and concentration, to amylan qualified till, add compound binding agent then and stirred compound 10 minutes, add tricresyl phosphate tincture fat again, stirring forms.

4, instant-drying composite gum made from starch according to claim 1 when it is characterized in that adding compound binding agent in reactor, need add its weight ratio and be 1: 9 water dilution.

5, instant-drying composite gum made from starch according to claim 2 is characterized in that the outer heating unit of reactor can be electric heating device, fire or steam unit.

6, instant-drying composite gum made from starch according to claim 1, the weight ratio that it is characterized in that the optimum formula of amylan is a starch: sodium hydroxide: hydrogen peroxide: sodium tetraborate: water=15.4: 1.18: 0.24: 0.24: 82.94, the add-on of tricresyl phosphate tincture fat was 0.001% of an amylan amount.