Island fiber, also known as super-conjugate fiber, matrix fibril fiber, is a core component (also known as "island" phase or dispersed phase) composed of a polymer material dispersed in a longitudinally continuous form in another polymerization. It is formed by a sea component (also called a "sea" phase or a continuous phase) composed of materials. Since the dispersed phase fibrils are in an island state in the fiber cross section, they are called island fibers.

The development of island fiber

The island fiber was first developed in the early 1970s and was originally used primarily to produce suede fabrics.

In 1970, Toray Co., Ltd. first introduced the artificial deer skin fabric "ECSAINA" made of dissolving ultrafine fibers (island-type microfiber) to the market, marking the beginning of industrial production of island-type composite microfiber.

In 1972, Japan Textile Corporation also successfully developed a dissolving polyester-kilette composite fiber under the trade name “BELIMA”.

In recent years, Japan, South Korea, Taiwan, the United States, and Italy have all developed and produced. The island fibers in Japan, the United States and Europe have been industrialized and the technology is relatively perfect. South Korea and Taiwan also have some representative products.

China began to study island composite microfibers in the early 1970s, but it did not make substantial progress until the 1990s. It was included in the National Science and Technology Development Plan during the 7th Five-Year Plan period.

Island fiber production technology

The island fiber has two production methods: composite spinning method and blend spinning method. The composite island fiber and the blended sea-island fiber are obtained respectively. The island components are generally PET and PA, and the sea components are mostly COPET, PVA, PE, PS. Wait. The production method of island fiber is as follows:

According to the difference of soluble components in the fiber as island or sea phase, the composite island fiber is divided into island-type island fiber and non-determined island fiber.

The island-type ultra-fine fiber is obtained after the "island" of the island-type island fiber is dissolved to obtain the hollow fiber, and the non-station island-type island fiber is dissolved in the "sea".

Island fiber characteristics

The island fiber has excellent properties that ordinary fiber can't achieve. Its main characteristics are as follows:

The fiber diameter of the island is extremely small, which makes the fabric soft and smooth, and has obvious advantages in comfort. It can obtain fabrics with high density, hygroscopicity, water repellency, unique aesthetics and fashion style. At the same time, a multi-layer structure can be formed on the surface of the fabric, so that the reflective point of the fabric is small, the gloss and the color are soft, and the appearance is full, fine and delicate.

The inter-fiber space is dense and dense, and the capillary action can be used to obtain better water absorption and oil absorption of the fabric. In addition, the inter-fiber voids can be appropriately changed to form a sea-island high-density fabric having a void of only 0.2 μm to 10 μm, and has excellent waterproof and vapor permeability properties. The microporous structure between the fabrics allows for more static air in the fabric, thus providing better insulation and warmth.

The flexural rigidity of the ray fiber is small, and the fabric is easy to obtain a smooth and chic effect; the core layer is a high shrinkage yarn, which gives the fabric excellent drape and visual comfort.

The fiber has a large specific surface area and a large number of voids, so that the fabric has extremely high dust absorption, decontamination and filtration; the fiber is slender and soft, and can protect the cleaned items from injury, and is a high-performance cleaning product.

In addition, the island fiber fabric not only has the characteristics of non-ironing of synthetic fiber, good dimensional stability and small shrinkage rate, but also has the advantages of good natural fiber drape, moisture absorption and moisture permeability.

Island fiber application

1, fashion fabrics

Since the number of filaments of the microfiber is larger than that of the ordinary filament, the surface area of ​​the fiber is large, and the gas permeability of the fabric is increased. After passing through the nonwoven fabric, the nonwoven fabric is used as a base fabric, and after being polished and sanded, the system is prepared. As a super-natural fabric, because of its breathability and softness, it is superior to natural textiles, making chemical fiber fabrics into the high-end fashion field.

2, artificial leather

PU leather with fine fiber as base fabric not only has similar microstructure to natural leather, but also has good moisture permeability and dimensional stability. Its fastness is better than natural leather, and it avoids the natural products due to the type, size and location of animals. The difference caused by the difference is large, and the effective utilization rate is small. In addition, PU leather also overcomes the fact that natural leather is popular among consumers because of its proneness to moisture, mildew and odor.

3, high performance 揩 cloth

Due to its small fineness, large specific surface area, and good flexibility, the ultra-fine fiber has strong water absorption and suction resistance. After wiping the thin oil film, it will not damage the substrate, but also wipe clean and leave no residue. High-performance crepe, such as high-grade drapes.