mesh spunlace nonwoven punlaced non-woven material
punlaced non-woven material: viscose polyester production according to the different percentage of the material
First, spunlace non-woven process:
A. fiber material → open mixing → combing → laying → draft → pre-wet → positive spikes → finishing → drying → winding → water treatment cycle.
B. fiber raw materials → open mix → combing messy network → pre-wet → positive spikes → finishing → drying → winding. Water treatment cycle of different ways to affect the final product of the vertical and horizontal strength ratio, the process A on the fiber longitudinal and transverse strength ratio of the better regulation, suitable for the production of hydrated leather fabric; process B suitable for spunlace production The Second, pre-wetting
The formed web is fed into a spunlace machine and is first pre-humidified.
The purpose of pre-wetting is to compel fluffy webs to remove the air from the web so that the web enters the spunlace zone and effectively absorbs the energy of the water jet to enhance the fiber entanglement.
Common pre-wetting method:
A. double net clamp type
B. With the hole roller and the net curtain clamp type
The pre-wetted fiber mesh enters the spunlace area, and the water jet hole of the spout is sprayed with a plurality of fine water jets and perpendicularly to the web. The water jet causes a part of the surface fiber in the web to be displaced, including the vertical movement to the opposite side of the web. When the water jet penetrates the net, it is subjected to the rebound of the curtain or the drum and is scattered to the web in different orientations Negative. In the direct impact of water jet and rebound under the dual role of water, fiber in the fiber displacement, interspersed, entangled, together, the formation of numerous flexible entanglement point, so that the network is reinforced.
The direct injection of water jet to the web prevents the destruction of the web structure and maximizes the energy of the water jet, thereby improving the performance of the spunlace nonwoven material.
Spunlace reinforcement methods are flat net spunlace reinforcement, drum spunlace reinforcement and drum and flat net combination of three types of spunlace reinforcement.
Tailor curtain weaving structure and the appearance of the appearance of the structure of the wire sprinkler reinforcement process, the spitles along the drum array, the network adsorbed on the drum, to accept the spout jet water jet jet. The net is adsorbed on the drum, there is no deviation phenomenon, is conducive to high-speed production, while the network in the spunlace area was curved surface, to accept the spear surface relaxation, reverse compression, which is conducive to water jet penetration, effectively Tangled fiber.
Drum for the metal cylinder perforated structure, equipped with dehydration device, and flat net spunlace reinforcement compared to the net curtain, the water has a good rebound effect.
Fourth, the combination of drum and flat net spunlace reinforcement In the spunlace reinforcement process, the combination of flat and drum type can be used to avoid weaknesses, to play their respective advantages, usually the first level, the second level for the drum sprinkler , The third level for the flat network spunlace.
5, the number of spunlaced and water spunlace reinforcement technology commonly used in the number of sparks 7 to 12, the commonly used water pressure of 60 ~ 250Bar, depending on the quality of fiber network area, production speed, etc., spithead pressure The setting is usually low to high to low.
Six, the structure of water jet analysis According to fluid mechanics, water spray from the water hole, can be called non-submerged free turbulent jet. After the water jet is ejected from the water spray hole, the jet is gradually changed from the bundled jet to the dispersed water droplet due to the lateral pulsation of the turbulent jet and the frictional resistance of the air convection.
7, the purpose of dehydration is to remove the retention of water in the network, so as not to affect the tangent effect of the next spunlace. When the water in the network more water, will cause the water jet energy dispersion, is not conducive to fiber entanglement. After the end of the spunlace process will be the lowest moisture in the network, is conducive to reducing drying energy consumption.
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