CN101550301A - Biochemical chalk and preparation method thereof - Google Patents

Abstract

A biochemical chalk and a preparation method thereof belong to the field of environment-protection articles of culture and education. The biochemical chalk is prepared by the following main materials according to weight percentage: 52 to 56 percent of base material, 2 to 4 percent of zeolite powder, 2 to 4 percent of ledikite powder, 33 to 38 percent of titanium pigment and 1 to 3 percent of glycerin, wherein the base material comprises the following components according to mass percentage: 15 to 20 percent of surface active agent, 7 to 9 percent of essential oil, 1 to 2 percent of edible oil, 50 to 55 percent of paraffin, 1 to 2 percent of alcohol and 16 to 22 percent of vegetable palm oil. The preparation method comprises the steps of: preparing the base material by stirring and heating according to the components of the base material and weight percentage; preparing the materials of the biochemical chalk by stirring and heating according to the components of the materials and weight percentages; and finally injecting the materials into a steel mould, pressing, cooling and cutting the materials to obtain the finished product. When in use, the biochemical chalk avoids powder generation; and the handwriting can be cleaned by a wet cloth; the writing with the biochemical chalk is smooth and the clear. The biochemical chalk is prepared by easy-available and environment friendly materials and has simple preparation process and low preparation cost.

Description

A kind of biochemical chalk and preparation method thereof

Technical field

The present invention relates to a kind of biochemical chalk and preparation method thereof, belong to environmental protection school supply and stationery technical field.

Background technology

The micro-ion of tradition chalk dust has very strong germ adsorptive power, and chalk dust contains compositions such as heavy metal cadmium, lead, manganese simultaneously.Heavy metal compositions such as these harmful germs and cadmium, lead, manganese cause inflammation easily to positions such as the respiratory system of Faculty and Students, skin, otorhinolaryngology.At present in a lot of chalk ingredients that school uses, outside deleading, manganese equal size are low slightly, the content of heavy metal cadmium is higher, in a single day cadmium is inhaled in the human body, mainly be stored in the tissues such as liver, kidney, bone, obvious to these tissue injurys, the major lesions that long-term contact cadmium thing causes is pulmonary emphysema and liver damage, show as symptoms such as unable, thin, dizzy, insomnia and dreamful sleep, appetite stimulator and neurasthenia in early days, and symptoms such as nose is bleeding, chronic pharyngitis, chronic bronchitis, nasal mucosa atrophy are arranged.

In order to solve the problem that traditional chalk dust flies away, a lot of manufacturers propose dust-free chalk, micronic dust chalk, liquid chalk.Now dust-free chalk of selling on the market or micronic dust chalk adopt and add the method that grease or polyalcohols material are made tamanori in original chalks, make its proportion bigger, be difficult for dispersing, but practical situation are unsatisfactory.Chalk write with erase process in can produce a large amount of dust, swim in for a long time aerial, the severe contamination room air.The liquid chalk adopts the design concept of blank pen, adopts independent ink storehouse structure, repeatedly the can ink.Serve as a teacher when using and make it unlatching and provide ink to nib by the spring valve of written transfer function power to ink storehouse.But the liquid chalk needs special-purpose black (green) plate, perhaps pastes special-purpose pad pasting on existing blackboard or green plate surface, need carry out the blackboard transformation, and chalk liquid can shoal very soon through the volatilization writing after writing, and the classmate in recoil often reflection does not see the writing on the blackboard content.The liquid chalk is normally imparted knowledge to students owing to problems affect such as a liquid supply is not smooth usually appear in the writing process in the structure design reason.

Summary of the invention

In order to overcome problems of the prior art, the invention provides a kind of biochemical chalk and preparation method thereof.This biochemical chalk should not produce dust when using, and just can clean with wet cloth, writes smoothly, and writing is clear; Select the environment-friendly materials that are easy to get for use, manufacture craft is simple, and cost is low holds concurrently.

Technical solution of the present invention is: material composition and mass percent that a kind of biochemical chalk is main are:

Composition quality per-cent

A, base-material 52～56%,

B, zeolite powder 2～4%,

C, Erie's stone flour 2～4%,

D, titanium dioxide 33～38%,

E, glycerine 1～3%;

Described base-material composition and mass percent are:

A, tensio-active agent 15～20%,

B, essential oils 7～9%,

C, edible oil 1～2%,

D, paraffin 50～55%,

E, alcohol 1～2%,

F, vegetalitas plam oil 16～22%.

Described tensio-active agent is selected from Yelkin TTS, amino acid pattern, betaine type, glyceryl monostearate, sucrose ester, the lipid acid sorb is smooth and polysorbate in one or more.

The making step that a kind of biochemical chalk making method adopts is as follows:

(1) making of base-material

Tensio-active agent, essential oils, edible oil, paraffin, alcohol and vegetalitas plam oil are placed stirred vessel by certain quality per-cent, are that 2000～2200 rev/mins, temperature are 90～110 ℃ and stirred 1.5～2 hours with rotating speed, make base-material;

(2) making of raw material

Base-material, zeolite powder, Erie's stone flour, titanium dioxide and glycerine are placed stirred vessel by certain quality per-cent, are that 2000～2200 rev/mins, temperature are 90～110 ℃ and stirred 1.5～2 hours with rotating speed, make raw material;

(3) making of product

The raw material that stirs is injected punching block, compacting, cools off, cuts into finished product, and pack after coating starch on the surface.

The invention has the beneficial effects as follows: material composition and mass percent that this biochemical chalk is main are: base-material is 52～56%, and zeolite powder is 2～4%, and Erie's stone flour is 2～4%, and titanium dioxide is 33～38%, and glycerine is 1～3%; Wherein base-material composition and mass percent are: tensio-active agent is 15～20%, and essential oils are 7～9%, and edible oil is 1～2%, and paraffin is 50～55%, and alcohol is 1～2%, and the vegetalitas plam oil is 16～22%.Its making method is: press earlier base-material composition and mass percent, make base-material through stirring, heating; Press material composition and mass percent again, make raw material through stirring, heating; At last raw material is injected punching block, compacting, cools off, cuts into finished product.This biochemical chalk does not produce dust when using, and just can clean with wet cloth, writes smoothly, and writing is clear; Select the environment-friendly materials that are easy to get for use, manufacture craft is simple, and cost is low holds concurrently.

Embodiment

Embodiment 1

(1) making of base-material

Is tensio-active agent (Yelkin TTS) 20%, and essential oils are 7%, and edible oil (soybean oil) is 2%, paraffin is 50%, alcohol (industrial spirit) be 2% and the vegetalitas plam oil be 19%, place stirred vessel, with rotating speed is that 2000 rev/mins, temperature are 100 ℃ and stirred 2 hours, makes base-material;

(2) making of raw material

Base-material 52%, zeolite powder 4%, Erie's stone flour 4%, titanium dioxide 38% and glycerine 2%, place stirred vessel, be that 2000 rev/mins, temperature are 100 ℃ and stirred 2 hours with rotating speed, make raw material;

(3) making of product

The raw material that stirs is injected punching block, compacting, cools off, cuts into finished product, and pack after coating starch on the surface.

The biochemical chalk hardness of producing by above-mentioned prescription is moderate, and is softening, indeformable in 45 ℃ of environment, use smooth, writing is clear.

Embodiment 2

(1) making of base-material

Is tensio-active agent (the smooth and polysorbate of lipid acid sorb) 15%, essential oils are 9%, edible oil (soybean oil) is 2%, paraffin is 50%, alcohol (industrial spirit) be 2% and the vegetalitas plam oil be 22%, placing stirred vessel, is that 2000 rev/mins, temperature are 90 ℃ and stirred 2 hours with rotating speed, makes base-material;

(2) making of raw material

Base-material 56%, zeolite powder 2%, Erie's stone flour 2%, titanium dioxide 38% and glycerine 2%, place stirred vessel, be that 2000 rev/mins, temperature are 90 ℃ and stirred 2 hours with rotating speed, make raw material;

(3) making of product

The raw material that stirs is injected punching block, compacting, cools off, cuts into finished product, and pack after coating starch on the surface.

The biochemical chalk hardness of producing by above-mentioned prescription is moderate, and is softening, indeformable in 45 ℃ of environment, use smooth, writing is clear.

Embodiment 3

(1) making of base-material

Is tensio-active agent (glyceryl monostearate and sucrose ester) 17%, essential oils are 8%, edible oil (soybean oil) is 3%, paraffin is 55%, alcohol (industrial spirit) be 1% and the vegetalitas plam oil be 16%, placing stirred vessel, is that 2000 rev/mins, temperature are 110 ℃ and stirred 1.5 hours with rotating speed, makes base-material;

(2) making of raw material

Base-material 54%, zeolite powder 3%, Erie's stone flour 3%, titanium dioxide 38% and glycerine 2%, place stirred vessel, be that 2000 rev/mins, temperature are 110 ℃ and stirred 1.5 hours with rotating speed, make raw material;

(3) making of product

The raw material that stirs is injected punching block, compacting, cools off, cuts into finished product, and pack after coating starch on the surface.

The biochemical chalk hardness of producing by above-mentioned prescription is moderate, and is softening, indeformable in 45 ℃ of environment, use smooth, writing is clear.

Claims (3)

1, a kind of biochemical chalk is characterized in that: material composition and mass percent that it is main are:

Composition quality per-cent

A, base-material 52～56%,

B, zeolite powder 2～4%,

C, Erie's stone flour 2～4%,

D, titanium dioxide 33～38%,

E, glycerine 1～3%;

Described base-material composition and mass percent are:

A, tensio-active agent 15～20%,

B, essential oils 7～9%,

C, edible oil 1～2%,

D, paraffin 50～55%,

E, alcohol 1～2%,

F, vegetalitas plam oil 16～22%.

2, according to the described a kind of biochemical chalk of claim 1, it is characterized in that: described tensio-active agent is selected from Yelkin TTS, amino acid pattern, betaine type, glyceryl monostearate, sucrose ester, the lipid acid sorb is smooth and polysorbate in one or more.

3, according to the described a kind of biochemical chalk making method of claim 1, it is characterized in that: the making step that it adopts is as follows:

(1) making of base-material

Tensio-active agent, essential oils, edible oil, paraffin, alcohol and vegetalitas plam oil are placed stirred vessel by certain quality per-cent, are that 2000～2200 rev/mins, temperature are 90～110 ℃ and stirred 1.5～2 hours with rotating speed, make base-material;

(2) making of raw material

Base-material, zeolite powder, Erie's stone flour, titanium dioxide and glycerine are placed stirred vessel by certain quality per-cent, are that 2000～2200 rev/mins, temperature are 90～110 ℃ and stirred 1.5～2 hours with rotating speed, make raw material;

(3) making of product

The raw material that stirs is injected punching block, compacting, cools off, cuts into finished product, and pack after coating starch on the surface.