Discussion On The Process And Performance Of Thermal Bond Nonwoven

1. Application of Thermal bond nonwoven

In recent years, polyolefin fibers for hygiene in my country have developed rapidly. Thermal bond nonwoven is mainly used for sanitary napkins, paper diapers, study pants, fabrics for adult incontinence pads, napkins, wet wipes, disposable tablecloths and protective products. The water permeability and moisture absorption and rewetting properties of the cloth can meet the requirements of the finished product, and the hand feeling is soft and meets the hygienic standard.

The fibers of hygienic materials for nonwovens industry usually meet two basic requirements: they are suitable for the production and process of nonwovens, and they have the characteristics to meet the final special purpose. Non-woven fabrics are: single fibers are assembled into a network structure, and then through different reinforcement processes, the fibers in the fiber net are bonded to each other to form a non-woven fabric of a certain specification. Different from traditional textile fabrics, the characteristics of fibers used in nonwovens directly affect the production and quality of nonwovens.

2. Experimental analysis

Using different types of polypropylene fibers for hot rolling processing, the test analysis can be obtained:

(1) The special polypropylene fiber for this kind of non-woven sanitary materials must have its own characteristics suitable for non-woven technology and hygienic standards. It is required that the fiber has good thermal bonding performance, low crystallization, low order state, low strength and high elongation, and good carding performance. The key to solving the above problems is to control the parameters such as pre-drawing ratio, spinning speed, and setting in the spinning process. By changing the performance of the oil agent, the fiber has the properties of water absorption and water repellency, and meets the standards in terms of hand feel and hygiene indicators.

(2) In the thermal bond nonwoven carding process, reasonable control of the carding degree of fibers and the use of fibers with low specific resistance are beneficial to the high-speed web-forming process.

(3) The speed of thermal bond nonwoven significantly affects the thermal bonding effect and selecting fine denier fibers is an effective way to improve the drape of nonwovens.

(4) The water permeability of thermal bond nonwoven for hygiene depends on the fiber spinning process, and the contribution of fiber strength to the strength of thermal bond nonwoven is not the main one. The strength of thermal bond nonwoven is a reflection of a comprehensive index.