Aiming at the problems that appeared in the downstream processing of fiber Z30S during developing in single loop polypropylene unit made in China, this paper introduced the improvements of type selecting of catalyst and optimizing production conditions.

By analysing the mechanisms of the quality index of the polypropylene fiber materials, this essay discusses that reducing the product ash, stablizing the product melt index and increasing the product isotacticity can improve the quality of the polypropylene fiber materials, and it also shows that applying these methods to the practical operation has got the obvious effects.

It is pointed out that the most applied and best means is looking for the little and light fiber and the added rare-earth-alloy composite with good shielding effect.

In this paper, the present status and progress of research on fiber assembly armor are reviewed.

Presently the non-woven industry has developed quickly with the extensive fiber material resources and the products applying field is enlarged instantly.

It also introduces the requirements of the special index of fiber material for spunlaced nonwovens and points out that the fiber material performance affects the properties of spunlaced nonwoven products.

The article introduces the status quo of spunlaced nonwoven fabric production and technological process, discusses applicable fibers for spunlacing production and the resulted products, and looks forward to the future development of spunlaced nonwovens.

The various nonwovens for use of medical and hygiene, fiber materials and production technique were also be presented.

In addition,filter media fibre of coal-fired power plants which were in common use were introduced,and the problems in using bag filter were summarized.

Application of immobilized cellobiase in cellulosic material hydrolysis;

In order to make sufficient utilization of them, the method of enzymatic hydrolysis for cellulosic materials was studied.