COMO É FABRICADO O PAPEL #Boravê 🔵Manual do Mundo

Summary

In this video, we explore the process of paper production at a factory in Limeira, São Paulo. The focus is on the use of eucalyptus, an Australian tree that thrives in Brazil. The process begins with harvesting eucalyptus logs, which are then washed, chopped into small chips, and prepared for pulping. The wood’s cellulose is separated from its lignin and other components using a chemical solution in two key stages: impregnation and digestion. This fascinating journey reveals how paper is made from trees in a controlled, sustainable manner, emphasizing the role of eucalyptus plantations in the process.

Takeaways

• 😀 The video explores how paper is made, starting with the role of trees, particularly eucalyptus.
• 😀 Eucalyptus is an Australian tree that grows well in Brazil and is primarily used for paper production.
• 😀 Paper is not made from wood sourced from natural forests, but from eucalyptus plantations, similar to crop farming.
• 😀 Eucalyptus trees used for paper production grow rapidly in about 6 years.
• 😀 The logs of eucalyptus trees, which are 3.6 meters long, are first measured for size and weight when they arrive at the factory.
• 😀 The logs are washed to remove sand and impurities, and even pass through a metal detector to ensure no foreign objects are present.
• 😀 The wood is then chipped into small pieces, which are referred to as 'cavacos' (wood chips).
• 😀 The chipping process is noisy and messy, with a machine that uses 15 knives to chop the wood.
• 😀 The motor used for grinding the wood has the power equivalent to 20 cars, highlighting the high energy involved in the process.
• 😀 The main components of wood are cellulose, lignin, and extractives, but only cellulose is needed for paper production.
• 😀 The process of separating cellulose from lignin and extractives involves two key chemical vessels: the impregnation vessel and the digestion vessel, where the wood is cooked with a white liquor.

Q & A

What is the main purpose of the video?

The video aims to explain how paper is made, specifically focusing on the process in a factory that uses eucalyptus wood as the primary raw material.

Where is the paper factory located?

The paper factory is located in Limeira, a city in the interior of São Paulo, Brazil.

Why is eucalyptus used to make paper in this factory?

Eucalyptus is used because it has a fiber that's ideal for making paper, and it grows well in Brazil, even though it's originally from Australia.

How long does it take for eucalyptus trees to grow in Brazil?

Eucalyptus trees take approximately 6 years to grow in Brazil.

Is the wood used for paper production taken from natural forests?

No, the wood comes from plantations, not natural forests. The eucalyptus trees are cultivated similarly to other crops like sugarcane or beans.

How long are the eucalyptus logs that arrive at the factory?

The eucalyptus logs that arrive at the factory are 3 meters and 60 centimeters long.

What is the purpose of the machine that measures the logs?

The machine measures the size or weight of each log to ensure it meets the required specifications for processing.

What is done to the logs after they are measured?

After measurement, the logs are washed to remove impurities such as sand or metal objects, and they are then cut into small pieces called wood chips.

What is the role of the 'licor branco' (white liquor) in the paper production process?

The white liquor is a chemical solution used to help separate the cellulose from lignin and other substances in the wood during the cooking process.

How does the wood processing machine work to cut the logs into chips?

The machine uses a disk with 15 knives to chop the logs into small pieces, which produces a lot of noise and dust, so the area is kept enclosed.

What happens after the wood is processed into small chips?

The wood chips are placed in two large vessels, the impregnation vessel and the digestion vessel, where they are mixed with the white liquor and then cooked to separate the cellulose from the lignin.