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What is the difference between Lyocell fiber and copper ammonia fiber? How to distinguish the two?

Both fabrics are recycled cellulose fibers, and the molecular structure of both are similar to cotton, but the production process is different. So how can these two similar fabrics be distinguished?
Lyocell fibre

From the production process

1, Lyocell fiber is a renewable coniferous wood fiber as raw material to prepare cellulose pulp, and then dissolved by organic solvents, wet spinning of regenerated cellulose fiber. The solvent used in the production process can be nearly 100% recycled, which is not easy to pollute the environment, and is a typical green environmental protection fiber.

2. Copper ammonia wire dissolves cellulose raw materials, and copper ammonia fiber can be prepared through a series of dissolution processes such as filtration and defoaming.

In terms of characteristics

1. Lyocell fiber has the characteristics of soft, breathable, smooth and cool, durable and durable, and its products have good wear performance, and are widely used in high-grade woven or knitted fabrics.

2. Copper ammonia fiber has the characteristics of refreshing, antistatic, breathing, good drape, etc., which can avoid discomfort such as sultry, and is very suitable for use as advanced lining material.

In terms of organizational structure

1, Lyocell fiber belongs to the skin core structure, the skin structure is dense and thin, with obvious fibrillar structure, under the action of mechanical external force, the fibrillar is separated from the fiber surface, resulting in fibrillation phenomenon.

2, copper ammonia fiber without skin core structure, not easy to produce fibrillation phenomenon.

In terms of fiber strength

1, the average degree of polymerization of copper ammonia fiber is 450 ~ 500, and the strength is slightly lower than Lyocell fiber.

2, the average degree of polymerization of Lyocell fiber is 500 ~ 550, the molecules are tightly structured, have a high intermolecular force, and the fiber strength is also large.

In addition, copper ion content analysis, near infrared spectrum analysis, X-ray diffraction analysis and other methods can be used to distinguish the two kinds of fibers.

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