FIBER FILAMENT NON-WOVEN FABRIC

Abstract

The invention discloses a fiber filament non-woven fabric with a small pore size and a large porosity, which adopts an island type ultra-fine fiber single filament, which is juxtaposed into an unidirectional silk layer several times, and a thin strip-shaped liquid is applied laterally on the unidirectional silk layer. The resin adhesive liquid bonds and fixes all the silk layers into a unidirectional non-woven fabric fixed in a grid segment. The unidirectional non-woven fabric is covered with meltblown non-woven fabric on one or both sides to make a filter material that can 100% filter viruses, bacteria, and micro-particles smaller than PM2.5. It can also be used for a wider range of filter materials, thermal insulation materials, oil absorption materials, battery separator materials, medical and health materials, environmental protection materials, clothing materials, wiping materials.

Claims

1. A fiber filament non-woven fabric with large aperture and porosity, using ultra-fine fiber filaments, including island fibers and composite fibers. It is characterized by the use of ultra-fine fiber single filaments (1), juxtaposed several times, stacked into an unidirectional filament layer (5), flattened by roller pressing, and there are gaps in the cross section of the longitudinal filament layer (3) To carry out segmentation, including applying thin strips of liquid adhesive material (4), impregnating the silk layer, bonding and fixing, including heating and welding, fixing the unidirectional silk layer (5) into a grid-type segmentation, for Strengthen the fixed unidirectional silk layer (5), you can also superimpose a layer of meltblown cloth on one or both sides of the fixed unidirectional silk layer (5), including fiber fabric cloth, and also include the fixed unidirectional layer (5). The fixed unidirectional silk layer (5) in different directions is superimposed, and then the above reinforcement layer is superimposed to form a composite nonwoven fabric with small pore size, large porosity and uniform porosity.

2. According to claim 1, a fiber filament nonwoven fabric with large pore size and porosity, and characterized in that the multiple parallel arrangement is an island type single wire containing several ultra-fine fibers Ultra-fine fiber filaments (2), including composite single filaments containing several fine fibers, several juxtaposed into small tows, then weakened and wound into a tube, and then the small tube is wound tows are untwisted and juxtaposed into large tows, and the weaken twists are wound into drums, including repeating one or more times in the above manner and juxtaposed into larger tow drums, after which each big tow drum is untwisted and paralleled into the established density required for the thickness and width of the unidirectional silk layer (5).

3. According to claim 1, the fiber filament non-woven fabric with large pore diameter and porosity, and wherein the parallel arrangement of several times includes the island-in-sea single ultra-fine fibers containing several ultra-fine fibers Filament (2), or a composite single filament containing several fine fibers, several juxtaposed into small tows, sizing and winding into small tow tubes, and then juxtaposing the tube into large tow belts, sizing It is wound into a large tow belt drum, and several belt drums are juxtaposed into the density required by the thickness and width of the established unidirectional filament layer (5) for desizing, cleaning and drying.

4. According to claim 1, a fiber filament nonwoven fabric with a large pore size and a large porosity and characterized in that a layer of melt-blown nonwoven fabric is superimposed on one or both sides of the fixed unidirectional filament layer (5). It also includes superimposing the melt-blown non-woven fabric on one or both sides of the unidirectional fixed filament layer into a bi-directional, multi-axial composite non-woven fabric as a reinforcement layer.

5. According to claim 1, a fiber filament non-woven fabric with a large pore size and porosity, and wherein the composite non-woven fabric is mainly used for filter materials, thermal insulation materials, oil-absorbing materials, battery separator materials, medical Sanitary materials, environmental protection materials, clothing materials, wiping materials.

6. According to claim 1, the change of the technical solution principle and scope of the fiber filament nonwoven fabric with small pore size and large porosity according to claims 1 to 6 shall fall within the scope of the claims of the present invention.

Description

DRAWING DESCRIPTION

[0010] The present invention will be further described below with reference to the drawings and embodiments.

[0011] FIG. 1 is a schematic diagram of a grid-type unidirectional filament layer filament nonwoven fabric of the present invention:

[0012] FIG. 2 is a cross-sectional view of a single island-in-the-sea microfiber after dissolution:

[0013] In the picture 1. microfiber single filament, 2. microfiber filament, 3. gap, 4. bonding material, 5. unidirectional filament layer.

DETAILED DESCRIPTION

Example 1

[0014] The fiber filament non-woven fabric with small pore size and large porosity adopts polyester (polyester fiber Polyester Fibers, English abbreviation PET) sea island type blended spinning method to produce ultrafine fiber single filament 1, each ultrafine fiber single filament Contains several ultra-fine fiber filaments 2, the island part remaining after the sea component is dissolved by a chemical method to form a very small aperture gap 3. Combine several ultra-fine fiber single filaments 1 side by side into a small tow, small The parallel ultra-fine fiber filaments in the tow are close to each other, and a gap 3 is formed at the contact. The ultra-fine fiber filaments 2 and the ultra-fine fiber filaments in parallel contact are extremely small Aperture gap 3. The gap 3 is smaller than the virus diameter, including the corona virus diameter. For easy winding of the parallel small tows, it is necessary to weaken the rolls and form a bobbin on the winding shaft. After that, several small tow rolls are retracted and juxtaposed into large tows. The large tow needs to be weakened and wound into a tube on the shaft. In order to reduce the number of parallel rows each time, the large tow bundles can be paralleled multiple times, and then several large tow cylinders can be retracted and exemplified as a unidirectional filament layer 5 with a set thickness and width. The set tension is applied at both ends in the longitudinal direction of the unidirectional silk layer 5 to keep the parallel wires in the silk layer straight. Adhesive material 4. The bonding material 4 should penetrate the silk layer and fix all the silk in the silk layer to form a non-woven fabric with a grid-type unidirectional silk layer 5 fixed in sections. A unidirectional silk layer 5 nonwoven fabric can be compounded with a reinforcing layer of meltblown nonwoven fabric to form a single-sided composite nonwoven fabric. It is also possible to compound a layer of melt-blown nonwoven fabric on both sides of the unidirectional silk layer nonwoven fabric to form a double-sided composite nonwoven fabric, which can be bonded.

Example 2

[0015] The grid-type unidirectional filament layer 5 non-woven fabric fixed in sections can superimpose the same unidirectional filament layer 5 non-woven fabric into two directions. 0°+90 ° bidirectional non-woven fabric can also be stacked into multi-axial, 0°+90°+45°+−45° multi-axial non-woven fabric. The superimposed layer can be bonded and bonded. It can also be covered with meltblown nonwoven fabric or woven fabric on one or both sides of the bidirectional, multiaxial nonwoven fabric to form a composite nonwoven fabric.

Example 3

[0016] In the process of juxtaposition of unidirectional filament layers, several ultra-fine fiber single filaments 1 can be juxtaposed. After sizing, they are wound into a tube to form a small tow tube. Later, several small tows are juxtaposed and sizing to form a large tow. Wind up into a large tow tube, parallel the large tow tube to desizing, clean and dry. The unidirectional filament layer 5 is formed.

Example 4

[0017] The unidirectional wire layer 5 can also be fixed by heating and welding, and a thin strip is welded on the cross section of the unidirectional wire layer 5, a thin strip is welded at a distance, and the circular unidirectional wire layer 5 is repeatedly circulated into a nonwoven The same welding method can be used for cloth, superimposed layer and covering layer.