Non-woven fabric

Abstract

The non-woven fabric comprises a base layer and a surface layer which are sequentially arranged from inside to outside, the surface layer is provided with wave parts which are arranged at intervals, each wave part is provided with a wave crest circle center part and a wave trough circle center part, the base layer and the surface layer are connected in a press-fit mode through press-fit parts, and the press-fit parts comprise the transverse press-fit part, the longitudinal press-fit part and the inclined press-fit part. The base layer and the surface layer are in press-fit connection through a transverse press-fit part, in the longitudinal direction, the base layer and the surface layer are in press-fit connection through a longitudinal press-fit part, and in the oblique direction, the base layer and the surface layer are in press-fit connection through an oblique press-fit part. Two layers of non-woven fabrics with different structures are formed by the surface layer unidirectional lapping and the base layer cross lapping, so that the tightness between fibers of the base layer non-woven fabrics is greater than that between fibers of the surface layer non-woven fabrics, and wave-shaped pressing is added to the surface layer, so that the pressing area of the fibers of the surface layer non-woven fabrics is increased; on the basis of wavy pressing of the surface layer, the base layer is connected through transverse, longitudinal and oblique pressing, so that the tightness among fibers is increased in multiple directions.

Description

Technical Field

[0001] The utility model relates to the field of non-woven fabrics, and more specifically, to a non-woven fabric. Background Art

[0002] The existing non-woven fabrics for linings do not have warp and weft yarns interwoven or transverse yarns knitted or vertical yarns knitted, and adopt plain weaving, so the strength of the non-woven fabrics for linings is insufficient. Utility Model Content

[0003] The purpose of the present utility model is to overcome the deficiencies of the above-mentioned prior art and to provide a non-woven fabric, which is a non-woven fabric with two layers of different fiber webs formed by unidirectional laying of the surface layer and cross-laying of the base layer, so that the tightness between the fibers of the base non-woven fabric is greater than the tightness between the fibers of the surface non-woven fabric, and the base of the surface layer increases the pressing area, so that the fibers of the surface non-woven fabric increase the pressing area, and the wavy portion forms a bulge, and the air permeability of the surface layer is increased by the wavy portion, and the base layer is connected by horizontal, longitudinal and oblique pressing on the basis of the pressing of the base of the surface layer, so that oblique pressing is added on the basis of cross-laying of the base layer, and multi-directional pressing is added on the basis of partial pressing of the surface layer, so as to increase the tightness between the fibers in multiple directions, so that the strength of the two layers of non-woven fabric is higher than the plain weave strength used in the existing non-woven fabric for lining.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The utility model discloses a non-woven fabric, comprising a base layer and a surface layer arranged in sequence from the inside to the outside, the surface layer being provided with wave portions arranged at intervals, the wave portions being provided with wave crest center portions and wave trough center portions, the base layer and the surface layer being press-connected by a press-connecting portion, the press-connecting portion comprising a transverse press-connecting portion, a longitudinal press-connecting portion and an oblique press-connecting portion, in the transverse direction, the base layer and the surface layer being press-connected by the transverse press-connecting portion, in the longitudinal direction, the base layer and the surface layer being press-connected by the longitudinal press-connecting portion, and in the oblique direction, the base layer and the surface layer being press-connected by the oblique press-connecting portion.

[0006] Furthermore, the pressing portion is a unit of a rectangle, the portion located on the short side of the rectangle is the transverse pressing portion, the endpoints of the transverse pressing portion are the center of the wave crest and the center of the wave trough, the portion located on the long side of the rectangle is the longitudinal pressing portion, the endpoints of the longitudinal pressing portion are the center of the wave crest or the center of the wave trough, and the portion located on the diagonal of the rectangle is the oblique pressing portion, the endpoints of the oblique pressing portion are the center of the wave crest and the center of the wave trough.

[0007] Furthermore, the diameter of the wave portion gradually decreases downward at the wave crest, and the diameter of the wave portion gradually increases upward at the wave trough.

[0008] Furthermore, in the transverse direction, the wave crest center portions and the wave trough center portions are arranged at intervals, in the longitudinal direction, the same vertical column is all the wave crest center portions or all the wave trough center portions, and the vertical columns of the wave crest center portions are arranged at intervals from the vertical columns of the wave trough center portions, and in the oblique direction, the wave crest center portions and the wave trough center portions are arranged at intervals.

[0009] Furthermore, the surface layer includes a surface layer base, and the wave portion is higher than the surface layer base.

[0010] Furthermore, the base layer is cross-laid and the surface layer is unidirectionally paved.

[0011] Furthermore, the non-woven fabric is made of polypropylene fiber with a gram weight of 120g / m^2-150g / m^2.

[0012] The beneficial effects of the utility model are:

[0013] By unidirectionally laying the surface mesh and cross-laying the base mesh, the surface unidirectional laying is partially pressed together to increase the tightness between the single-layer fibers. On the basis of partial pressing of the surface layer, the base layer is connected through transverse, longitudinal and oblique pressing, so that the oblique fiber pressing is added on the basis of cross-laying of the base layer. The joint pressing effect of curves and straight lines adds multi-directional pressing on the basis of partial pressing of the surface layer, thereby increasing the tightness of the multi-directional fibers. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 Schematic diagram of the structure of a non-woven fabric in this embodiment;

[0015] Figure 2 In this embodiment Figure 1 C-C direction cross-sectional view;

[0016] Figure 3 In this embodiment Figure 1 A magnified view of point A;

[0017] Figure 4 Schematic diagram of the structure of a single surface layer of a non-woven fabric in this embodiment;

[0018] Figure 5 In this embodiment Figure 4 Enlarged view of point B;

[0019] Figure 6 Schematic diagram of the surface fiber arrangement of a non-woven fabric in this embodiment;

[0020] Figure 7 This is a schematic diagram of the base fiber arrangement of a non-woven fabric in this embodiment.

[0021] Reference numerals: base layer 1, surface layer 2, wave group 20, surface layer base 21, wave crest center 201, wave trough center

[0022] 211, pressing part 3, horizontal pressing part 31, longitudinal pressing part 32, oblique pressing part 33. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] like Figure 1 As shown in FIG5 , a nonwoven fabric includes a base layer 1 and a surface layer 2 arranged from the inside to the outside, Figure 7 The base layer 1 is cross-lapped, which makes the fibers of the base layer 1 evenly arranged, thereby increasing the stability and tensile strength of the base layer 1. Because the fiber web is in composite motion after cross-lapping, the surface density of the base layer 1 is larger, so that the tightness between the fibers of the base layer 1 is larger. Figure 6 The surface layer 2 is unidirectionally laid, and this embodiment is vertically unidirectionally laid. The surface layer 2 forms a vertical fiber mesh structure through unidirectional vertical laying, so that the woven non-woven fabric has better tensile strength in the vertical direction. Because the unidirectional laying tightness of the surface layer 2 itself is less than the cross-laying tightness of the base layer 1, when pressed and connected, the fiber hairiness of the surface layer 2 with low tightness will be embedded in the base layer 1 and pressed, thereby increasing the strength of the two layers.

[0025] Reference Figure 5The surface layer 2 is formed into a non-woven fabric by vertical unidirectional laying and is provided with wave parts 20 arranged at intervals. The diameter of the wave part 20 gradually decreases downward at the wave crest, and the diameter of the wave part 20 gradually increases upward at the wave trough. In the transverse direction, the wave crest center 201 and the wave trough center 211 are arranged at intervals. In the longitudinal direction, the same vertical column is all the wave crest center 201 or all the wave trough center 211, and the vertical column of the wave crest center 201 and the vertical column of the wave trough center 211 are arranged at intervals. In the oblique direction, the wave crest center 201 and the wave trough center 211 are arranged at intervals, and the surface layer 2 includes a surface layer base 2 1. The wavy portion 20 is higher than the surface base 21, so that the surface base 21 forms a single-layer pressing, and the surface layer 2 adds the curve pressing of the single-layer fiber on the basis of the unidirectional laying, thereby increasing the tightness between the fibers of the surface layer 2. Because the curve pressing is adopted, the fiber pressing area of ​​the surface layer 2 is larger, thereby increasing the tightness between the fibers of the surface layer 2, making the non-woven fabric formed by the unidirectional laying less likely to loosen, thereby increasing the strength of the surface layer 2, and the wavy portion 20 forms a bulge. When the surface layer 2 is pressed with the base layer 1, a hollow is formed between the wavy portion 20 and the base layer 1, thereby increasing the air permeability after the surface layer 2 and the base fabric 1 are pressed.

[0026] Reference Figure 1-3, the wave portion 20 of the surface layer 2 is provided with a wave crest center portion 201 and a wave trough center portion 211, the pressing portion 3 includes a transverse pressing portion 31, a longitudinal pressing portion 32 and an oblique pressing portion 33, the pressing portion 3 is a unit of a rectangle, the transverse pressing portion 31 is located on the short side of the rectangle, the end points of the transverse pressing portion 31 are the wave crest center portion 201 and the wave trough center portion 211, the longitudinal pressing portion 32 is located on the long side of the rectangle, the end points of the longitudinal pressing portion 32 are the wave crest center portion 201 or the wave trough center portion 211, the oblique pressing portion 33 is located on the diagonal line of the rectangle, the end points of the oblique pressing portion 33 are the wave crest center portion 201 and the wave trough center portion 211, in the transverse direction, the base layer 1 and the surface layer 2 are in a straight line. The peak center 201 and the trough center 211 of the layer 2 are pressed and connected by the transverse pressing portion 31. In the longitudinal direction, the peak center 201 and the peak center 201 of the base layer 1 and the surface layer 2 are pressed and connected by the longitudinal pressing portion 32. The trough center 211 and the trough center 211 of the base layer 1 and the surface layer 2 are pressed and connected by the longitudinal pressing portion 32. In the oblique direction, the peak center 201 and the trough center 211 of the base layer 1 and the surface layer 2 are pressed and connected by the oblique pressing portion 31. After the two layers are pressed, the base layer 1 adds transverse, longitudinal and oblique pressing on the basis of the original cross-laid non-woven fabric, so that the transverse and longitudinal fibers of the base layer 1 are pressed more tightly. Strong, making the original transverse and longitudinal fiber tighter, in the oblique direction, the base layer 1 increases the tightness of the oblique direction fiber, so that the base layer 1 is pressed in the transverse, longitudinal and oblique directions, and the surface layer 2 increases the transverse, longitudinal and oblique linear pressing on the basis of the original irregular pressing, so that the pressing is increased after the surface base 21 is pressed. Through double pressing, not only the strength of the surface layer 2 is increased, but the two layers are connected at the same time. At the connection point, because the original tightness of the surface layer 2 is less than that of the base layer 1, but the surface layer 2 is pressed by a single layer, and the base layer 1 is not pressed by a single layer, the hairiness remaining in the surface layer 2 after pressing will be embedded between the fibers of the base layer 1 and pressed by two layers, so that the surface layer 2 and the base layer 1 are embedded through the fiber. Lamination strengthens the connection between the two layers, and the wavy portion 20 of the surface layer 2 is raised because the original tightness of the surface layer 2 is less than that of the base layer 1, and the raised fibers of the wavy portion 20 are not subjected to single-layer lamination, thereby increasing the air permeability of the non-woven fabric at the wavy portion 20 due to the loose fibers. After the surface layer 2 is lamination-connected with the base layer 1, the wavy portion 20 is interrupted at the connection, so that the fibers of the wavy portion 20 except the connection are neither lamination-loaded nor double-layer lamination, and thus do not affect the air permeability after the wavy portion 20 is lamination-connected with the base layer 1, while increasing the lamination connection of part of the fibers of the wavy portion 20 with the base layer 1, thereby increasing the fiber tightness between the wavy portion 2 and the base layer 1, thereby increasing the strength of the two layers of non-woven fabrics.

[0027] The non-woven fabric uses polypropylene fiber with a gram weight of 120g / m^2-150g / m^2. Preferably, the gram weight is 130g / m^2. The polypropylene fiber is spun through particles to make the non-woven fabric stronger. The polypropylene fiber has a fine fiber diameter, so the non-woven fabric has good air permeability after being formed, and the gram weight is higher, so that the non-woven fabric uses more polypropylene fiber, and the strength and stability of the non-woven fabric are improved by pressing.

[0028] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, certain improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A nonwoven fabric, characterized in that The invention comprises a base layer (1) and a surface layer (2) arranged in sequence from the inside to the outside, wherein the surface layer (2) is provided with wave portions (20) arranged at intervals, wherein the wave portion (20) is provided with a wave crest center portion (201) and a wave trough center portion (211), wherein the base layer (1) and the surface layer (2) are press-connected via a press-connecting portion (3), wherein the press-connecting portion (3) comprises a transverse press-connecting portion (31), a longitudinal press-connecting portion (32) and an oblique press-connecting portion (33), wherein in the transverse direction, the base layer (1) and the surface layer (2) are press-connected via the transverse press-connecting portion (31), wherein in the longitudinal direction, the base layer (1) and the surface layer (2) are press-connected via the longitudinal press-connecting portion (32), and wherein in the oblique direction, the base layer (1) and the surface layer (2) are press-connected via the oblique press-connecting portion (33).

2. A nonwoven fabric according to claim 1, characterized in that: The pressing portion (3) is a unit of a rectangle. The portion located on the short side of the rectangle is the transverse pressing portion (31), and the endpoints of the transverse pressing portion (31) are the center of the wave crest (201) and the center of the wave trough (211). The portion located on the long side of the rectangle is the longitudinal pressing portion (32), and the endpoints of the longitudinal pressing portion (32) are the center of the wave crest (201) or the center of the wave trough (211). The portion located on the diagonal line of the rectangle is the oblique pressing portion (33), and the endpoints of the oblique pressing portion (33) are the center of the wave crest (201) and the center of the wave trough (211).

3. The nonwoven fabric according to claim 1, characterized in that: The diameter of the wave portion (20) gradually decreases downward at the wave crest, and the diameter of the wave portion (20) gradually increases upward at the wave trough.

4. The nonwoven fabric according to claim 1, characterized in that: In the transverse direction, the wave crest center portion (201) and the wave trough center portion (211) are arranged at intervals; in the longitudinal direction, the same vertical column is all the wave crest center portion (201) or all the wave trough center portion (211), and the vertical column of the wave crest center portion (201) and the vertical column of the wave trough center portion (211) are arranged at intervals; in the oblique direction, the wave crest center portion (201) and the wave trough center portion (211) are arranged at intervals.

5. The nonwoven fabric according to claim 1, characterized in that: The surface layer (2) includes a surface layer base (21), and the wave portion (20) is higher than the surface layer base (21).

6. The nonwoven fabric according to claim 1, characterized in that: The base layer (1) is a cross-laid mesh, and the surface layer (2) is a unidirectional laid mesh.

7. The nonwoven fabric according to claim 1, characterized in that: The non-woven fabric is made of polypropylene fiber with a gram weight of 120g / m^2-150g / m^2.

Images