Medical non-woven fabric is widely used in clinical practice. As a new type of packaging material, it is suitable for pressure steam sterilization and ethylene oxide sterilization. It has flame retardancy and no static electricity. Due to its weak tear resistance and thinness, it is suitable for packaging relatively light and non sharp instruments. It does not contain toxic substances, is non irritating, has good hydrophobicity, and is not easy to cause moisture during use. It has a special structure to avoid damage and has a shelf life of 180 days after sterilization.
The strength of medical non-woven fabric is one of the important indicators for evaluating its performance, which directly affects its effectiveness and safety in the medical field. The strength of medical non-woven fabric is mainly reflected in the following aspects:
Strength definition and classification
The strength of medical non-woven fabrics usually includes tensile strength, tear strength, fracture strength, etc. These indicators measure the ability of non-woven fabrics to resist damage when subjected to external forces.
Factors affecting strength
Weight:
For non-woven fabrics produced on the same production line, the higher the weight, the harder and thicker the feel, and the corresponding increase in strength. For example, 60 grams of non-woven fabric is harder and has better strength than 50 grams of non-woven fabric.
Production process and materials:
Different production processes and material ratios have a significant impact on the strength of non-woven fabrics. For example, compared to the SMMMS (spunbond layer+meltblown layer+spunbond layer) structure, the SMS (spunbond layer+meltblown layer+meltblown layer+spunbond layer) structure may have better strength performance in certain aspects due to the addition of an extra meltblown layer. In addition, using finer fibers and more advanced production equipment can also improve the strength of non-woven fabrics.
Testing standards:
The strength testing of medical non-woven fabrics needs to follow relevant national and industry standards, such as the national standard GB/T 19679-2005 “Non woven Medical Materials“, which specifies key performance indicators such as the strength of non-woven fabrics.
Strength testing method
The strength testing of medical non-woven fabrics is mainly carried out through a tensile testing machine, which can apply tensile loads and measure the tensile strength, elongation and other indicators of non-woven fabrics. During the testing process, representative samples need to be selected and cut into standard sizes before being placed between the upper and lower fixtures of the tensile testing machine for testing.
Intensity performance
Medical non-woven fabrics usually perform well in terms of strength and can meet the special needs of the medical field. For example, non-woven fabric used for packaging surgical instruments needs to have high strength to ensure that it will not be damaged during transportation and storage; The non-woven fabric used for wound dressings needs to have a certain degree of flexibility and fracture strength in order to adhere to the wound and maintain stability.
Summary
In summary, the strength of medical non-woven fabric is a comprehensive performance indicator that is influenced by various factors such as weight, production process and materials, and testing standards. In practical applications, Lei needs to choose suitable medical non-woven fabric products based on specific usage scenarios and requirements. Meanwhile, strict testing and quality control are also necessary to ensure the strength and safety of medical non-woven fabric products.
Dongguan Liansheng Non woven Technology Co., Ltd. was established in May 2020. It is a large-scale non-woven fabric production enterprise integrating research and development, production, and sales. It can produce various colors of PP spunbond non-woven fabrics with a width of less than 3.2 meters from 9 grams to 300 grams.
Post time: Aug-17-2024