Thermal Insulation Materials: Traditional Upgrading Function Is Stable.

The research and development space of thermal insulation materials is also very large, not only to break through in the new field, but also to upgrade in the original field.

For example, to achieve the replacement of down.

Last year, Jiangsu Yizheng chemical fiber production Yi Zhen products were officially put on the market.

Yi Zhen velvet product is a new type of pearl cotton product developed by downstream users, led by the synthetic fiber Department of Chemical Sales East China branch, and jointly developed by Yizheng chemical fiber and Changshu Jinyu. It is mainly used for filling high-end clothing and toys.

The pearl ball made of special production technology is full of granules, soft and smooth in hand, and far superior to ordinary pearl cotton products.

After filling, the product has good dispersibility, and the effect of rebound is better. To some extent, it has reached the feel and substitution effect of natural down.

The added value of the product is relatively high, and the price per ton is higher than that of Yizheng chemical fiber company.

It's also a good material for making warm textiles.

Infrared thermal storage fiber mainly uses its sunlight and lights at any time to absorb the environment, and the human body's life hotline to store heat so as to achieve the purpose of thermal insulation. Therefore, infrared thermal storage and thermal insulation are long lasting, and there will be no feeling of being hot and cold. This is very suitable for making warmth.

。

Correspondingly, it is a hygroscopic and heating fiber. The main principle of this kind of fiber is to absorb the vapour in the gaseous state and turn it into liquid so as to pform its kinetic energy into heat energy.

Heat, but when the fabric is saturated with moisture, the liquid water becomes vaporized and evaporates. It also needs to absorb heat and make the fabric cool.

Therefore, the hygroscopic fever itself is not a process of long heating.

In the process of dyeing and finishing of concrete spinning, attention should be paid to the damage of phase change materials (microcapsules) that absorb moisture and heating fibers. As far as possible, the temperature, time and frequency of dyeing and finishing can be reduced as much as possible, otherwise, the damage of phase change materials will be caused.

In addition, moisture absorption and heating fabrics are not easy to store for a long time. During use, the number of times of moisture absorption and evaporation can be reduced to reduce the damage of phase change materials.

Related links:

The main component of superfine fiber is polyamide fiber.

According to the data, the composition and structure of polyamide fiber are simpler than that of protein fiber. Carboxyl and amino groups only exist at the end of molecular chain.

In the middle of the molecular chain, there are a large number of carbon chains and amide groups, without side chains.

Therefore, for the structure and production process of polyamide fiber, acid hydrolysis and enzymatic hydrolysis technology should be used first, chemical modification of superfine fibers should be carried out, and then the amide bonds should be opened to increase their active groups. Then, the retanning, filling, fatliquoring and dyeing techniques of natural leather were used to fill the superfine fibers, and improve the permeability and other physical properties of the superfine fibers.

As a new synthetic leather processing method, it is feasible to introduce leather wet processing and finishing technology into the production of microfiber synthetic leather.

But with the improvement of microfiber processing technology level, it is necessary to fundamentally improve the manufacturing process of microfiber cloth, so that the physical properties and touch of the superfine fiber base cloth and the natural leather leathers will be similar.

It is especially important to note that the development of microfiber synthetic leather must be combined with leather making, dyeing and finishing, shoemaking and furniture processing to form the top and bottom line and improve the overall development capability. Only in this way can we improve the vitality of microfiber synthetic leather.

Superfine fiber has the following four different production processes, blending fiber (indefinite island fiber): the advantage is that it is easy to produce very fine fibers. The disadvantage is that it is necessary to dissolve the fibers with solvent. The dissolved sea part PS will lose, and the proportion of "sea" is high, and the proportion of PU used in leather making is also high.

Island fiber: the advantage is that the fiber density is uniform, but if it is PET/PS component, it also needs solvent treatment; if it is PA/CoPET component, then part of the sea CoPET will also be wasted.

Direct spinning: no pollution, no loss, PET can be recycled.

Polyester / nylon composite: artificial leather contains two ingredients, no pollution, but it is difficult to split two ingredients intact.

Because of the reason of color fastness, it is not suitable for suede. Because of PA, it is not suitable for industrial application.

According to the quality of artificial leather, the products can be classified as high-grade suede: the Japanese factory has monopolized the market, and is a high-end product for clothing, household and automobile industries. Artificial suede is mainly produced by South Korea and Taiwan, China. It is made of nylon and sea island fiber and used in shoes and bags. Artificial smooth leather is produced with superfine nylon island fiber and applied to shoes and bags. Ordinary smooth leather is produced by ordinary polyester or nylon, mainly used in shoes and bags; woven suede: it is not artificial leather, and the price is low.