Is the choice of needle-punched non-woven fabrics as thick as possible?
The increase in the thickness of non-woven fabrics means an increase in weight per unit area and an increase in strength. However, due to the structure, the increase in thickness does not mean an increase in the barrier performance of microorganisms.
For example, using a thickened non-woven fabric, the increase in the weight of the spunbond layer does not effectively increase its resistance to bacteria, only when the key filter layer (That is, the melt spray layer)
The pore size of the can effectively filter microorganisms and dust to invade, and its resistance to bacteria meets the requirements.
With the increase of thickness, the air permeability of the packaging materials will also be affected, and the probability of wet packaging will also increase.
Because it is a fabric that does not need spinning and weaving, it only directional or randomly propped textile staple fibers or filaments to form a fiber mesh structure, then it is reinforced by mechanical, thermal or chemical methods.
Simply put, it is not intertwined and knotted by one yarn, but the fibers are directly bonded together by physical means, so, when you get the stick in your clothes, you will find that you can't draw a thread.
Non-woven fabric breaks through the traditional textile principle and has the characteristics of short process flow, fast production speed, high output, low cost, wide use and many sources of raw materials.
In clinical use, the non-woven fabric will be damaged after sterilization. For this kind of damage, it is mainly because the micro-fine plastic fiber of the non-woven fabric will shrink to a certain extent after high temperature sterilization, in use, the sterilized non-woven fabric is brittle than before sterilization. Therefore, applying too much force or unreasonable method of taking and placing during use will cause destructive damage to the packaging material, in addition, the use of burrs on the edge and sharp instruments can also cause damage to the non-woven fabric.
In this case, it is recommended that the clinical packaging should be tight and easy to handle, and the double-layer packaging recommended by the specification will greatly reduce the probability of damage.
If the damage problem is solved only by increasing the thickness of the non-woven fabric, it is necessary to closely observe the probability of the wet bag in addition to ensuring the resistance of the bacteria.
In a word, the thicker the non-woven fabric is, the better. On the premise of ensuring the resistance of bacteria and tensile strength, the phenomenon of wet wrapping of materials with good air permeability will be reduced.
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The material and processing procedure for acupuncture non-woven fabrics are made of polyester and polypropylene raw materials, which are combed, pre-combed, combed, pre-punched and main acupuncture.
The center is added with a mesh interlayer, and then through double-Channel nuclear treatment, the air flow is formed into a mesh needle composite cloth, and the dust filter cloth has a three-dimensional structure. After heat setting, after burning, the surface is most treated by chemical oil, the filter cloth is smooth in appearance and evenly distributed in micropores. The density of the product is good from the surface, while the surface is smooth and breathable. The filter on the plate and frame compressor proves that high-pressure strength can be used, the filtration accuracy is as high as 4 microns, and two raw materials, polypropylene and polyester, can be provided according to the needs of users.
Practice has proved that non-woven filter cloth has better performance in Plate and Frame pressure filtration: coal slime treatment in coal preparation plants, mineral refining in mineral processing mountains, wastewater treatment in steel plants, and wastewater treatment in breweries and printing and dyeing plants.
Other specifications of the milk gel will cause the problem that the filter cake is not pressed and difficult to fall off. After using the non-woven filter cloth, the filter cake reaches 10kg in the filter press-
It is quite dry at 12 kg, and the filter cake will automatically fall off when the filter is opened.
When selecting non-woven fabrics, users mainly consider non-woven filter fabrics of different thickness and quality according to air permeability, precision and elongation. Product parameters are introduced in polyester needle felt and polypropylene needle felt, and specifications and varieties can be formulated.
The needle-punched non-woven fabric series product room is formed by fine combing, multiple precision acupuncture or proper hot rolling treatment. On the basis of the introduction of many high-precision acupuncture production lines at home and abroad, high-quality fibers are selected, through the cooperation of different production processes and the matching of different materials, hundreds of different products are currently circulating on the market, mainly including: geotextile, geomembrane, needle felt, non-woven fabric, metes, Flume, acrylic, coated needle felt, anti-static needle felt, sandwich non-woven fabric.
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