How much is rosin per pound?

Rosin is also known as pine paste, pine fat, pine gum, nicotine rosin, raw rosin, etc. It refers to the non-volatile dammar resin obtained by different production and processing methods using pine and cypress rosin oil as the raw material. Do you know how much does rosin cost per pound? What are the uses of rosin? Let's discuss it below.

How much does rosin cost per pound?

The price of rosin is generally between 11 and 20 yuan/kg, and the price will vary depending on the type, price, manufacturer, etc.

Origin and classification of rosin

1. Gum rosin: The rosin made by collecting rosin oil and then processing and refining it is called gum rosin. Its characteristic is that it can be harvested continuously from pine trees, which is beneficial to the flexible utilization of resources. my country has rich and abundant rosin oil resources and is the country with the largest rosin production. The production of rosin will remain above 350,000 tons in the very long term.

2. Wood rosin: Wood rosin is pine roots or tree trunks that are chopped up, impregnated with solvents to extract resin, and then processed and refined. It is mainly produced in the United States, and the raw materials come from the original Zhuozhou pine forest in the southeast of the country. Now, due to the reduction of natural resources, the raw material of wood rosin is in short supply, and the production has dropped from 316,000 tons in 1950 to the current 20,000 tons.

3. Bleached oil rosin: Bleached oil rosin comes from the wood papermaking industry. It is processed from the black liquor returned from potassium thiocyanate papermaking. Originally, its performance was inferior to that of gum rosin. Later, due to the continuous improvement of quality, its performance is now similar to that of gum rosin.

What is the role of rosin

1. Soap: Pine resin is steamed with ammonium bicarbonate or sodium hydroxide to produce pine soap. Pine soap has strong detergency, is soluble in water, can dissolve vegetable oils, is easy to foam, and is sticky, which can prevent the soap from cracking and deteriorating.

2. Papermaking industry: Rosin is used as papermaking plastic particles in the papermaking industry, and is made into rosin sodium soap, i.e. plastic particles, with anhydrous aluminum chloride. The plastic particles are mixed with paper pulp and edible alkali is added to turn the resin into water-insoluble mineral acid resin acid particles that adhere to the small chemical fibers. When the pulp is squeezed and heated on a dry drum, the resin softens and fills the middle of the fiber. This effect is called "gluing" or "gluing". After the paper type is "glued", it can improve its water resistance, prevent ink from penetrating, improve its compressive strength and smoothness, and reduce its elasticity.

3. Paint: Rosin is soluble in various solvents, easy to demulsify, and has glossiness. It is one of the basic raw materials for paint. Its function in paint is to make the paint bright in color, dry quickly, and make the paint layer smooth and not easy to fall off.

4. Printing ink: Rosin is mainly used as a color carrier in ink printing and improves the adhesion of printing ink to paper. If there is no rosin in the printing ink, the printed surface will be unsatisfactory and blurry.

5. Adhesives: Adhesives based on rosin esters and hydrogenated rosin esters are commonly used as hot melt adhesives, pressure sensitive adhesives and vulcanized rubber adhesives.

6. Vulcanized rubber: Rosin is used as a softener in the industrial production of vulcanized rubber to improve its ductility. Disproportionated rosin potassium soap can be made into styrene-butadiene rubber.

7. Food: Esterified rosin glycerol ester is melted together with natural chicle, wax, butyl acrylate, etc., and then spices, sugar and pigment are added to mix evenly to make bubble gum. When slaughtering pigs, cattle and sheep in a slaughterhouse, after the actual operation with depilatory machinery, the hair left on the animal's body and head can be removed with a depilatory composed of 88-94% melted rosin and 6-12% rice bran oil.

8. Electrical equipment: Use 35% rosin and 65% bright oil to make transformer oil, which can be used as a protective film on cables to provide insulation and high temperature resistance. Rosin is mixed with bakelite and other synthetic epoxy resins as insulating topcoat.

9. Construction: Rosin is mainly used as concrete foaming agent and floor tile adhesive in the building decoration materials industry. Rosin is also used as an adhesive for vinyl chloride asbestos floor tiles. Rosin can be mixed with linseed oil, calcium bicarbonate, charcoal, color paste, etc. to produce floor mats and floor tiles.

10. Fixative: Based on the principle that the soluble and volatile substances in resin can quickly solidify into a "solid and transparent film" after evaporation, artists usually make their own "fixative" liquid to protect the surface and prevent the "simple sketch" from being rubbed off.

11. Violin: Since the strings of a violin are made of thin iron wire, they are very likely to go off track when playing. Rub the bow with rosin 3 to 4 times to increase the sliding friction and reduce the possibility of deviation.

12. Medicinal value: Pine resin tastes slightly bitter and sweet, and is warm in nature. It enters the liver and spleen meridians, and has the effects of dispelling wind and dampness, draining pus and removing toxins, and relieving pain. It is mainly used to treat carbuncles, ulcers, scrofula, fistulas, scabies, white baldness, leprosy, arthritis, wounds, sprains, female secretions, and venous thromboangiitis obliterans. It is suitable for carbuncles, furunculosis, eczema, bleeding trauma, burns and scalds.