primitive survival evolution

Chapter 206 Rubber Industry
Patriarch Nanmang looked suspicious, then looked at Li Yan, and said, "Patriarch Yan, you guys continue to eat, I'll go out for a while."

"En." Li Yan nodded.

Patriarch Nanmang and the other three patriarchs walked out, leaving Li Yan and others to continue eating, while Qiao greeted them.

"Qiao, do you rarely go out of the swamp?" Li Yan asked while eating.

"Yes, there are many powerful alliances outside the swamp, so we rarely go outside." Joe nodded.

An hour later, Li Yan also finished eating, and the Nanmang patriarch and others also came back.

A few Nanmang people held some pottery, as well as materials such as sulfur and obsidian. Obviously, this Nanmang tribe continued to trade with the Taotang tribe.

At the beginning, Li Yan was puzzled, why did they continue to trade with the Taotang tribe?
Later, when I saw that I was empty-handed, I realized it. After all, I had to rely on myself to say that they didn't know what the situation of the Jiang tribe was. Continue to trade with the Taotang people.

This is someone else's business, so it's not easy for Li Yan to ask.

After agreeing a time for the transaction with the Nanmang patriarch, Li Yan bid farewell to them and returned to the Jiang tribe with the team. In addition, Li Yan also took several barrels of natural rubber.

A month later.

The first batch of leather materials of Jiangnan Tannery Factory passed the acceptance inspection, and the workers of the Bang Tribe received their first wages.

This batch of leather materials was also sent back to the Jiang tribe's shoe factory and leather bag factory for further processing, saving a lot of manpower.

The rubber research of the Jiang Tribe has also made a breakthrough. After a month of unremitting efforts, Li Yan successfully vulcanized natural rubber and produced three kinds of rubber with soft, medium and hard properties.

For example, when a small amount of sulfur is added, soft rubber is produced, when 20.00% sulfur is added, medium-soft rubber is produced, when more than 40.00% is added, it becomes hard rubber, the more sulfur is added The more, the higher the hardness of the rubber.

But in addition to adding sulfur, carbon black (charcoal powder) must be added, so that the rubber produced will be durable.

It is not difficult to vulcanize rubber. On the fifth day after the success, Li Yan organized workers to build a rubber factory, and trained workers and prepared tools for rubber production.

A workshop for making charcoal, a workshop for sorting and vulcanization, a workshop for vulcanization, and finally a workshop for rubber products, as well as a warehouse for raw materials and a warehouse for finished products.

Nuoda's workshop has brick walls more than two meters high on all sides, and workshops and warehouses inside are neatly distributed around the walls.

Half a month later, the factory was built, and [-] male and female workers were trained for a period of time to officially start work and carry out the first trial production.

Three workers grind charcoal into powder, two workers remove impurities from sulfur and grind it into powder, and two workers weigh charcoal and sulfur powder in proportion.

In the vulcanization workshop, a large pottery pot was slowly heating up, and the natural rubber inside began to melt and become sticky. A worker began to add sulfur and charcoal powder into it, and a person kept stirring the rubber in the pot with a wooden stick. After all the ingredients are added, cover the pottery lid again.

After half an hour.

Li Yan did it himself, scooped out the hot rubber water from the pot with a ceramic bowl, and poured it into a ceramic mold.

The mold is in the shape of a shoe sole with a layer of hemp gauze inside as a frame.

After filling two molds, Li Yan handed over the work to the workers and continued to fill the shoe molds.

After the mold cools down.

Li Yan took out two soles and observed them. The soles were moderately soft rubber. The surface was soft, but the inside was firm, orange-gray yellow in color, and very wear-resistant, stronger than hard animal skin soles.

"That's right, I'll use this as the sole of my shoes in the future!" Li Yan nodded with satisfaction.

After pouring this medium rubber, Li Yan asked the workers to make hard rubber.

Harder rubber naturally has more sulfur added.

The vulcanized rubber liquid obtained this time is slightly cooled to make the rubber liquid more viscous.

A large stone mortar is covered with a relatively thick linen net, and then the rubber liquid, which is as thick as plasticine, is poured in, and the staff holds a wooden stick to smooth and shape it. After cooling, a black rubber bucket is obtained.

Although the surface of this bucket is not flat, it is enough to hold water, such as daily irrigation for tribal farmers, so that people can develop those fields with higher terrain.

Rubber shoes and rubber buckets are two items that rubber factories will vigorously produce in the future.

Li Yan has studied and guided in the rubber factory for more than a week. The workers in the rubber factory have basically learned the production procedures. Yan can leave a lot of effort.

As the rubber products in the rubber factory were produced in batches, the first batch of rubber-soled shoes in the shoe factory also began to be mass-produced.

Rubber-soled boots are durable and far better than leather-soled boots.

Li Yan is very satisfied with this batch of rubber-soled shoes from the shoe factory, and now the shoe factory is still producing leather-soled shoes.

"Patriarch, do you want to produce leather-soled shoes and straw sandals in the future?" the shoe factory supervisor asked.

"Production! Production of all types! Leather-soled shoes and straw sandals are still useful. I guess other tribes have begun to imitate our animal-skin shoes, but there is still a market for our shoes, and people in our tribe still wear them. "Li Yan nodded.

"And what about the rubber-soled shoes?"

"Continue to produce rubber-soled shoes, don't promote them to ordinary tribesmen, but distribute them to tribal fighters!" Li Yan nodded.

"Yes, a lot of leather materials have been sent from Jiangnan Tannery recently, and there is no shortage of materials for animal leather shoes."

"Of course there is no shortage. There is a tribal alliance in the swamp that trades animal skins for pottery with us."

Li Yan remembered something, and said, "By the way, I'm going to see the batch of pottery from the Nanmang tribe. Don't talk, keep busy."

"Yes"

Li Yan walked out of the shoe factory and quickly ran out of the industrial area. He wanted to go back to Jiangcheng, but he saw a group of foreigners arriving at the entrance of the valley, and an errand runner ran up to Li Yan.

"Patriarch, Patriarch Wuxian is here again."

"Patriarch Wuxian? Didn't the batch of animal leather shoes be delivered last time? Why are they here again? I'll go and have a look."

Li Yan felt strange and ran quickly.

When we came to the inside of the door, we saw the head of the Wuxian tribe welcoming us with a smile. Behind him were dozens of warriors and a few well-dressed middle-aged men. outside.

"Patriarch Wu Xian, are our shoes bad?" Li Yanlian asked.

"Patriarch Yan, your shoes are very good. I am here this time to exchange more shoes with you."

Patriarch Wu Xian smiled and looked at the men in better clothes, and said, "The patriarchs also want to do business with you."

(End of this chapter)