What is Animal Glue? What is it used for?

It is a protein solid made from animal skin, bones or tendons, etc., and the collagen contained in it is partially hydrolyzed, extracted and dried. Pale yellow to brown color. Soluble in water, slightly soluble in alcohol, insoluble in organic solvents.

Its aqueous solution is surface-active, has a high viscosity, and when cooled, it freezes into an elastic gel, and then returns to a solution when heated. The latter is a property specific to animal glue and can be quantitatively expressed in terms of gel strength, which is customarily referred to as freezing force. This is the main physical property that determines the commodity value of animal glue, which is the rigidity of the gel formed under standard conditions.

The value of the commodity increases with the increase of freezing power. Freezing force is determined with a special instrument called a bloom meter, expressed in "grams".

Animal glue is mainly used as industrial adhesives, emulsifiers and emulsion stabilizers, flocculants in mineral processing, sizing agents in the paper and textile industries, as well as for plate making and ink roller manufacturing in the printing industry, and also has a wide range of important uses in the production fields of food, photographic materials, pharmaceuticals and cosmetics. Modernly developed microencapsulation technology is a new field of application for animal glue.

There are many uses....For example, cosmetics....Architectural decoration....

Animal glue glue liquid preparation modern dry animal glue is also easy to prepare into glue liquid when used, the dry glue can be directly added to the hot water of mechanical stirring to dissolve, the hot water temperature is 65 77C, and the temperature of the leakage state is gradually reduced to 60 after dissolution This is the best temperature range for the effective operation of animal glue. The preparation time of each batch of glue usually takes 30 to 60 minutes. Another method of preparing the glue is as follows: first soak it in cold water until it swells (it takes 30 to 45min), and then transfer it to a jacketed melting tank equipped with a stirrer to melt and stir into a solution.

This method is suitable for batch production of small quantities and multiple times. For best results, dry adhesives should always be measured by mass, not by volume (which can lead to large talk errors). The amount of water required should also be weighed initially, and then added according to the marked scale made for the successful batch.

The material of the mixing tank is preferentially made of galvanized iron and stainless steel to search for lead, and the iron and copper cans may cause the discoloration of the glue after long-term heating. Smaller mixing tanks can be heated by jacketed hydroelectric water, while larger mixing tanks can be heated with low-pressure steam.

Dear, hello animal glue formula is as follows:1The preparation of skin glue is first washed with water, and then soaked with lime milk to remove non-gum proteins; Then use hydrochloric acid, sulfuric acid or sulfurous acid to adjust the slightly acidic properties, and then wash with water to carefully remove the excess acid.

The raw materials are transferred to the cooking tank or kettle, hot water is added, and a series of staged cooking is carried out according to a carefully controlled heating and time protocol, and the dilute glue is leached in stages until the rubber is completely extracted. Then filter this rubber mother liquor, evaporate the solidification content l6 45, and dry it in a continuous dryer with conditioned filtered air for 2 2 5 hours. 2.

Bone glue is prepared using fresh or "green" bone, a by-product of a food processing plant. The bone glue prepared by the solvent extraction degreasing method is called extractive bone glue. The preparation process of modern bone glue is similar to that of leather glue:

First, the raw bone is cleaned with water or oleic acid, added to the pressure tank, and repeatedly extracted by hot steam and hot water to separate the dilute bone glue from the raw bone residue. The loose fat is then filtered or centrifuged to remove the free fat, which is then evaporated to a high solids content for final drying. Dried products of leather glue and bone glue are usually ground before packaging, 8 12 for coarse abrasives and 25 35 for fine abrasives.

3.Animal glue glue liquid preparation modern dry bucket surplus animal glue is also easy to prepare into glue when used, can be directly added to the mechanical stirring hot water to dissolve, the hot water temperature is 65 77, after dissolving gradually good code cooling to 60 63 - this is the best temperature range for the effective operation of animal glue. Each batch of glue preparation time empty sock rolling usually takes 3 0 Another glue preparation method is as follows:

It is first soaked in cold water until it swells (30 to 45 min), then transferred to a jacketed melting tank equipped with a stirrer, where it is melted and stirred into a solution. <>

If my answer is helpful, please give it a thumbs up (rate it in the bottom left corner) <>

I look forward to your praise, your efforts are very important to me, and your support is also the driving force for my progress<><

If you are satisfied with my answer, <>

You can click on my avatar for one-on-one consultation. Finally, I wish you good health and a good mood! <>

The main ingredient of animal glue is protein, and the glue contains pigments, and its color composition may affect the picture. When choosing animal glue, the more transparent and soft the gum, the better.

Dry abrasive cloth has different requirements for glue concentration and viscosity according to the different particle size of the abrasive used. Practice shows that with the same bucket of glue, due to the different viscosity of animal glue, different moisture content, different proportion of dry glue composition, put the same amount of water in the same weight of animal glue, the result is that the viscosity and concentration difference of dissolved into glue is very large, and the thickness fluctuates when sizing, and the quality of the abrasive cloth also fluctuates. Therefore, if you can find out the regularity between the viscosity of the glue, the composition of the glue, and the concentration of the glue, it will be of great guiding significance for production.

The requirements for glue concentration and viscosity are also different. Practice shows that with the same bucket of glue, due to the different viscosity of animal glue, different moisture content, different proportion of dry glue composition, put the same amount of water in the same weight of animal glue, the result is that the viscosity and concentration difference of dissolved into glue is very large, and the thickness fluctuates when sizing, and the quality of the abrasive cloth also fluctuates. Therefore, if you can find out the regularity between the viscosity of the glue, the composition of the glue, and the concentration of the glue, it will be of great guiding significance for production.

In addition, from the perspective of applicability, reliability and economy of the products produced, it is also required that there is a reasonable ratio of leather glue, gelatin and bone glue. If the amount of leather glue and gelatin is large, the quality fastness of the abrasive cloth is good, but the cost is high, if the amount of bone glue is large, the viscosity will be low, and the product quality will be improved.

It has been shown in practice that a variety of animal glue with different viscosities can be mixed in different proportions, which has obvious effects in reducing costs and improving the viscosity of glue. Regarding the formulation design and calculation method of glue, because the viscosity of leather glue, gelatin and bone glue is not the same, two or three of them are reasonably used, and a ratio with predetermined viscosity can be obtained by mathematical calculation method.

As follows:

Animal glue liquid preparation Modern dry animal glue is also easy to prepare into glue liquid when used, dry glue can be directly added to the hot water of mechanical stirring to dissolve, the hot water temperature is 65 77, and gradually cooled down to 60 63 after dissolution - this is the best temperature range for the effective operation of animal glue. The preparation time of each batch of glue usually takes 30 to 60 minutes.

Another method of preparing the glue is as follows: first soak it in cold water until it swells (it takes 30 to 45min), and then transfer it to a jacketed melting tank equipped with a stirrer to melt and stir into a solution. This method is suitable for batch production of small quantities and multiple times.

For best results, dry adhesives should always be measured by mass, not by volume, which can lead to large errors.

Production process of animal glue: raw material pretreatment and extraction.

1. Pretreatment of raw materials.

Remove non-collagen substances contained in raw materials (aggregates or leathers), such as fats, minerals, etc. The main processes are degreasing, alkali treatment, and acid treatment. The raw material pretreatment process is relatively simple for industrial glue, but has higher requirements for gelatin.

The pretreatment process is related to the variety and quality of the finished product.

2. Extraction. First of all, the cross-linked hydrogen bonds or electrostatic bonds formed in the collagen contained in the raw materials are broken under the action of hot water. The second is the hydrolytic cleavage of the covalent bonds, which causes the disintegration of collagen, which is called unwinding. After unwinding, soluble animal glue is formed.

Extraction from hot water yields a light glue solution with a concentration of 3 8% (mostly 5 7%). The extraction steps and process conditions vary from product to product.