First, the characteristics of laminated nonwovens
(A) laminated non-woven fabrics are textile, chemical, vertical materials, paper industry, the staggered edge products
In the range of laminated nonwovens products, some products are closer to textiles (such as yarn layer stitch laminated non-woven fabrics). Some closer to the plastic (such as membrane fissured laminated non-woven fabric), and some closer to the paper (for example, Laminated Nonwoven Fabric some wet laminated non-woven fabrics, and some special laminated laminated non-woven fabrics and non-woven paper ).
(B) laminated nonwovens product appearance, structural diversification
As the laminated non-woven processing used in raw materials, means and process transformation. Making the laminated nonwovens product appearance and structure also varied. (10g / m.), Thick (100 c'g / m.); There are soft fluffy flakes, there are stiff class, a strong lower product, but also high-strength products The
From the processing method, because the reinforcement of the fiber network will appear 1: the same characteristics, characteristics of nonwovens. But regardless of the kind of laminated non-woven fabrics, mostly fiber-based, or "fiber" products. The structure of the network has two-dimensional arrangement, Laminated Nonwoven Fabric there are three-dimensional arrangement of the rigid geometry, and some by a single layer of thin network structure laminated or laminated.
(C) laminated nonwovens widely used
In the clothing, decoration, civil engineering, agriculture, aerospace, medical and health, transportation and other industries, its wide range of applications far more than traditional textiles. Although the application of laminated nonwovens in some industries, Laminated Nonwoven Fabric such as clothing, is far more than conventional textiles, it can not completely replace traditional textiles, but its industrial use value is increasingly showing its diversity and superiority.
Second, the structure of laminated nonwovens
(A) in the organizational structure and the woven fabric, knitted fabric distinction
Woven fabrics and knitted fabrics are cloth, but they are based on yarn or chemical fiber filament as the basic raw material. According to a certain geometric structure through the intertwined or woven from. In the woven fabric or knitted fabric, the stability of the geometry depends entirely on the yarn in the fibers and fibers between the cohesion, yarn and yarn friction and knitting force. Laminated Nonwoven Fabric It can be seen from the microstructure of the woven fabric that the warp and the weft are intertwined, the warp and the weft are pressed against each other, and the deformation of the fabric is prevented by the external force. Therefore, the structure of the woven fabric is generally stable. But lack of flexibility. In the fabric structure. The loop-shaped structures of the yarns are connected to each other. When the fabric is subjected to external forces, the yarns that make up the lines are intertwined with each other, Laminated Nonwoven Fabric so the knitted fabric has good elasticity, and in daily life we have the experience.
Laminated nonwovens and woven fabrics, knitted fabrics, mainly for. "Fiber network" products. In order to stabilize the structure of the fabric, the web (net) must be fixed or reinforced by applying pressure or adding the adhesive, or by means of thermal bonding, filament and fiber winding, plus yarn geometry The Therefore, most nonwovens are formed by the basic structure of the web and reinforcement system.
(B) of the typical structure of laminated nonwovens
The structure of the laminated nonwoven fabric is determined by the raw material and the processing mode. Different processing methods produce different structures, such as the formation of different ways, the reinforcement of different forms of network, laminated non-woven fabric structure can occur in many forms. In the form of fiber mesh, it can be divided into fiber parallel (longitudinal) arrangement, Laminated Nonwoven Fabric horizontal arrangement, vertical and horizontal cross-arranged and chaotic arrangement of the network. The longitudinal arrangement is essentially parallel, but some of the fibers are arranged in a transverse or disorderly manner. If the reinforcement in accordance with the form of the following points have the following structure.
1, the fiber part of the fiber reinforced structure
(1) is reinforced by the entanglement of the fiber: this form is due to the result of mechanical reinforcement, such as acupuncture, jet spunlace, etc., of course, fiber entanglement enough to tangent shape of the fiber bundle, The tangling is called "fiber interweaving". The specific approach is by the hook of the needle or high pressure water vertical vertical and horizontal thorn network, Laminated Nonwoven Fabric so that the direction of the fibers tangled with each other. This method is characterized by the processing of fiber with its own fiber with each other to strengthen the tangled.
(2) Reinforced by the fiber-forming coil structure: The laminated nonwoven fabric of this structure is made by a sewing method based on the principle of mechanical reinforcement. This method is stapled laminated nonwovens technology in the development of a late. It uses the groove needle in the stitching process from the network to extract part of the fiber bundle, with it compiled into a regular coil-like geometry, Laminated Nonwoven Fabric so that the fiber mesh reinforcement.
2, the net is reinforced by the addition of yarn
Horizontal folding of the multi-layer fiber feeding sewing machine. Which is reinforced by the warp knitting structure formed by the addition of the yarn (which may also be the chemical fiber filament) by the function of the sewing machine. This type of yarn reinforcement in the form of coil staircase and brazing structure has a clear boundary, the formation of the geometric structure of the coil will be stable. The more the number of fiber bundles enveloped by each coil, the greater the tightening force of the coil to the fresh net, the more the number of coils per unit area, and the more stable the structure of the nonwoven fabric. However, there is a yarn in the laminated nonwoven fabric structure. And the definition of the front non-woven fabrics are different. So it was called nonwovens, some people do not call it laminated nonwovens. We do not have to be overly defined in the definition. For example, for the weft needle and no weft (with) acupuncture papermaking blankets are generally referred to as laminated nonwovens.