Latex – Thongsin

Fresh Latex

Fresh latex is a white liquid resembling coconut milk or milk,

with a slight viscosity. It has a unique pleasant smell and is

neutral in pH, with a negative charge. This requires the use of a positively charged substance to coagulate the latex.

Fresh latex, after being tapped, begins to deteriorate after about 4

hours. The change can be observed as the latex, while still fresh,

is fluid and disperses well in water.

The fresh latex obtained is processed into two forms: Concentrated Latex – This is the raw material for manufacturing various rubber products

such as rubber gloves, medical equipment, electronic parts, balloons, etc.

Dried Rubber – This includes products like smoked rubber sheets, air-dried rubber sheets, rubber blocks, and crepe rubber, among others.

Add chemicals to preserve the latex.
Use a centrifuge to separate the head and tail of the latex.
Direct the latex into tanks (the bottom of the tank is lined with chemicals).
The "head" goes into the tank as concentrated latex.
The "tail" becomes skim rubber.
Wait for the latex to fill the tank and add more chemicals according to specifications.
Cure the latex for about 26-30 days, or longer.

Smoked rubber sheets, or RSS 3 (Natural Rubber Ribbed Smoked Sheet No.3), are raw rubber sheets

that are smoked in a rubber-smoking facility to dry thoroughly. These sheets are then sorted and graded according

to quality standards, which include contamination, air bubbles, color consistency, and foreign particles.

Used in the production of parts that require high flexibility and impact resistance, such as

truck tires, aircraft tires, and machinery mounts.

Peel about 2-3 sheets or 4-5 sheets of rubber and place them on a cart.
Weigh the rubber and pass it through a pressing machine.
After pressing, the rubber sheets are wrapped and coated with starch to prevent sticking.