Chapter 224 (1/2)

”Chief, since you said this kind of cigarette paper is very high-grade, what kind of material should be used? Our paper mill used all kinds of long fiber grass and cheap wood to produce newsprint Seeing the stone bear's promise, edian was very excited and began to ask questions.

”David, cigarette paper needs to be light, tough and whiteness, so we can't use some grass as the raw material for newsprint. Well, the best material for making cigarette paper is wood. Of course, a small amount of flax can be added Said the stone bear.

In later generations, there are many raw materials that can be used for papermaking. Of course, the best one is still wood. However, there are too few trees in later generations, and it is not enough for people to plant trees. How can wood be used for papermaking?

Only some very high-grade paper will use specially planted fast-growing poplar, fast-growing eucalyptus and other fast-growing trees as raw materials. Most of the paper is made from a mixture of grasses and a small amount of wood.

However, as a raw material of papermaking, grass needs too many hetero cells, so the wastewater from papermaking is very difficult. Moreover, the storage and transportation of grasses are not as good as wood, especially grasses are easy to cause mildew and fire in the process of storage.

Why did later countries make so much effort to renovate small paper mills? It's very simple, because most of these small paper mills use grass as raw materials for paper making, which causes too much pollution. But the cost of wastewater treatment is very high. If the scale of the factory is not large, the cost of wastewater treatment will be greatly increased.

And if the scale of the plant is large, the cost of wastewater treatment will become much lower, which is why although those large paper mills are also using grass as paper raw materials, the benefits are still passable.

The cost of papermaking with wood is high, but the pollution is low. The cost of papermaking with grass is low, but the pollution is high. This is a difficult contradiction to solve.

At this time, no one is responsible for the problem of pollution. The most important thing is that there are a lot of forests around the gaoshu tribe and even most areas east of the Mississippi River. The forest coverage rate is almost as high as that of the Amazon rainforest, so there is no shortage of wood at this time.

”Chief, what kind of wood? I think the wood used for cigarette paper should be very high-grade, too? ”

Shi Xiong shook his head and said: ”there is no difference in the production process of cigarette paper and ordinary paper, and there is no difference in the raw materials used. It's just that some additives that ordinary paper can't use need to be added in the process of making cigarette paper. It's just like the material we're going to use to make cigarette paper. We can use hardwood and coniferous wood. The specific ratio is about 6:4, that is, 60% hardwood and 40% coniferous wood. ”

These ratios are learned from the Internet in the previous life of Shi Xiong.

Just like in the paper industry, softwood is called softwood, hardwood is called hardwood. The paper made of coniferous wood has good tensile strength, wet running performance, paper machine running performance, tearing degree and internal bonding strength; The paper made of hardwood has excellent performance in loose thickness, stiffness, opacity and dimensional stability.

As a high-grade paper, cigarette paper must combine the advantages of the two raw materials.

Hearing the stone bear's words, adien spat out his tongue. ”Chief, this paper material is high-grade. If all our paper mills used this material to make paper, our paper mill would have closed down long ago.”

Stone bear said with a smile: ”your home is your home. Your paper mill is in the old world. Have you ever seen so many trees in the old world?” Stone bear pointed around, ”here, there are plenty of trees that you can use freely. Well, there are a lot of pine trees on the hillside of Dawu Mountain. Whether it's loblolly pine or loblolly pine, they are excellent raw materials for papermaking. And below the hillside, you can use all those oak trees, and this oak tree is very good for papermaking. ”

David adian looked around in the direction of the stone bear's fingers, shook his head again with constipation and said, ”boss, it's too extravagant, too extravagant, so extravagant that I'm embarrassed to start...”

The two burst out laughing.