什么是纸浆?
纸浆 is broken down plant fiber. It is the primary raw material 使用d as the first step in the papermaking process. In addition to pulp being the basis for products like copy paper and cardboard boxes, this fascinating material is also found in:
- 尿布
- 月经的产品
- 电脑屏幕
- 油漆
- 衣服
制造纸浆, 十大菠菜软件成员公司 使用 2路主输入:
- 木 from sustainably managed forests where trees are replanted
- 再生纸
纸浆是怎样制成的?
图片来源:Domtar
The pulping process starts with what kind of input material is being 使用d.
使用木材时, the main goal of pulp production is to separate the cellulose fibers from the lignin. Cellulose fiber is the structural backbone of paper products. Lignin is a natural glue-like substance that holds the cellulose together.
Softwoods, like pine, and hardwoods like oak or ash are both 使用d to make pulp. Softwood pulp has longer fibers 并用于产品 需要力量, like cardboard— what the industry refers to as containerboard, — or paper grocery bags.
Hardwood pulp has shorter, fatter fibers 这增加了产品的体积. 他们还 做一些柔软的东西. This makes it good for things like toilet paper and paper towels.
当 使用 再生纸, papers that are recovered for re使用 are mixed in a giant blender called a repulper. This helps separate the fibers so they can be washed, screened and turned into something new.
What Are the Main Types of 纸 纸浆?
纸浆 can be divided into 2 main groups based on how it was produced: Mechanical and chemical.
机械浆
Sometimes called groundwood, this pulp is broken down manually. 它经过一个 物理研磨工艺 木头.
This process keeps the lignin in the pulp. Keeping lignin in the pulp means more pulp is produced. However, it also means there are more impurities in the final product.
这个果肉是 用于 products like newspapers or magazines.
化学浆
这个果肉是 broken down 使用 a variety of chemicals, referred to as “liquor.” 超过90% of these chemicals are re使用d.
Using chemicals allows the cellulose fibers to separate without losing their strength or length. A mixture of long and short fibers is 用于 高品质的产品 printer paper and writing paper.
Leftover waste chemicals, called black liquor, can be burned as fuel to power the mill.
什么是特种纸浆?
There are many types of specialty pulps.
绒毛浆: Fluff pulp is a highly purified pulp. This means the lignin is removed entirely, leaving only the cellulose fibers. 这个果肉是 very absorbent and can be found in items like diapers and menstrual products.
Nanocellulose: 这些果肉最终会进入 你的电脑屏幕! Nanocellulose — which is just cellulose but smaller — dries thin, clear and flexible and can be 使用d when making certain technology.
Cellulose fibers from pulp called Dissolving 纸浆 can even be converted into threads and end up in the fabric of your clothes or sheets.
Is the 纸 Industry Producing 纸浆 Sustainably?
Our industry takes the environmental impact of pulp and paper production seriously. Sustainable practices are the foundation of our industry, including:
- Sustainable forest best management practices
- 负责任的木材采购
- 电子竞技赌注的软件
- 减排
- 水资源管理
十大菠菜软件成员公司 5 sustainability goals for 2030 to help advance sustainable products for a sustainable future.
