Production process of semi-cross-laid double-sided spunlace

Abstract

The invention discloses a semi-cross-laid double-sided spunlace fabric production process, and relates to the technical field of spunlace non-woven fabrics, the semi-cross-laid double-sided spunlace fabric production process comprises the following steps: S1, preparing a first fiber raw material, a second fiber raw material and a third fiber raw material; s2, carding, lapping and disorderly drafting the first fiber raw material and the third fiber raw material to form a first fiber net and a third fiber net; performing carding lapping, cross lapping and disordered drafting on the second fiber raw material to form a second fiber web; s3, overlapping the first fiber web and the third fiber web to two sides of the second fiber web, and performing spunlace compounding to obtain a composite fiber web; s4, drying the composite fiber net to obtain a spunlace non-woven fabric; s5, carrying out online defect detection on the spunlace non-woven fabric; s6, the spunlace non-woven fabric is wound and cut; on the basis that multiple layers of fiber nets are arranged, the second fiber nets are laid in a crossed mode, the strength of the spunlace non-woven fabric is improved, and the resistance effect of the composite fiber net on transverse and vertical tension is effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of spunlace nonwoven fabrics, and in particular to a production process of a semi-cross-laid double-sided spunlace fabric. Background Art

[0002] Spunlace non-woven fabric is a new generation of environmentally friendly material. It is moisture-proof, breathable, flexible, easy to decompose, non-toxic and harmless. It is usually made of natural fibers or synthetic fibers, such as cotton, polyester, etc.

[0003] No resin or adhesive is required in the production process of spunlace non-woven fabrics. Spunlace non-woven fabrics are made by spraying high-pressure fine water streams onto one or more layers of fiber webs, causing the fibers to entangle with each other, thereby reinforcing the fiber web and giving it a certain strength.

[0004] However, the spunlace nonwoven fabrics currently on the market are easy to deform and have large differences in strength in the horizontal and vertical directions, which affects the user experience.

[0005] Therefore, people are in urgent need of a semi-cross-laid double-sided spunlace fabric production process that can improve the strength of spunlace non-woven fabrics and their resistance to horizontal and vertical tension. Summary of the invention

[0006] The purpose of the present invention is to provide a semi-cross-laid double-sided spunlace fabric production process to solve the problems existing in the above-mentioned prior art. By compounding multiple layers of fiber webs and coordinating the cross-laying of the second fiber web in the middle, the strength of the spunlace non-woven fabric and its resistance to horizontal and vertical tension are improved.

[0007] To achieve the above object, the present invention provides the following solution: The present invention provides a semi-cross-laid double-sided spunlace fabric production process, comprising the following steps:

[0008] S1: preparing a first fiber raw material, a second fiber raw material and a third fiber raw material;

[0009] S2: The first fiber raw material and the third fiber raw material are carded, laid and randomly stretched to form a first fiber web and a third fiber web; the second fiber raw material is carded, laid, cross-laid and randomly stretched to form a second fiber web;

[0010] S3: The first fiber web and the third fiber web are superimposed on both sides of the second fiber web, and are hydroentangled to obtain a composite fiber web;

[0011] S4: drying the composite fiber web to obtain a spunlace nonwoven fabric;

[0012] S5: Online defect detection of spunlace nonwovens;

[0013] S6: Winding and slitting the spunlace nonwoven fabric.

[0014] Preferably, in step S3, the second fiber web is firstly hydroentangled with the first fiber web to obtain a fourth fiber web, and the fourth fiber web is then hydroentangled with the third fiber web.

[0015] Preferably, the fourth fiber web and the third fiber web are respectively subjected to hydroentanglement jacquard patterning and then hydroentangled composite.

[0016] Preferably, after the fourth fiber web is hydroentangled with the third fiber web, hydroentanglement jacquard patterning is performed again.

[0017] Preferably, the first fiber web and the second fiber web are preliminarily extruded before being hydroentangled, and the fourth fiber web and the third fiber web are preliminarily extruded before being combined.

[0018] Preferably, in step S3, negative pressure adsorption is used to transport the fiber web, and the fiber web is flat and has no curling.

[0019] Preferably, in step S1, the raw materials of the first fiber raw material, the second fiber raw material and the third fiber raw material are a mixture of one or more of polyester, viscose fiber, polypropylene fiber or cotton fiber, and the raw materials of the first fiber raw material, the second fiber raw material and the third fiber raw material are the same or different.

[0020] Preferably, in step S5, the online defect detection includes metal detection, defect detection and X-ray detection.

[0021] Preferably, defect detection uses a high-intensity light source in conjunction with a CCD camera to scan the spunlace nonwoven fabric passing at high speed, and records the defect distribution and defect size on the fabric in real time. The defect size is screened by a computer, and the system finds the defects that need to be removed and gives the coordinates of the defects.

[0022] Preferably, X-ray detection uses a running trolley to perform real-time detection of the surface density of the fiber web, real-time analysis of the actual surface density of the fiber web and its CV value, and feeds it back to the system. The system automatically adjusts the relationship curve between the position of the web laying trolley and the doffer of the front combing machine based on the detection.

[0023] Compared with the prior art, the present invention mainly achieves the following technical effects:

[0024] On the basis of multi-layer fiber web composite to enhance the strength of spunlace nonwoven fabric, a middle layer of second fiber web is cross-laid to further improve the strength of spunlace nonwoven fabric and effectively improve the resistance of composite fiber web to horizontal and vertical tension. At the same time, the first fiber web and the second fiber web do not need to be cross-laid, thus reducing production costs.

[0025] Compared with the prior art, other solutions of the present invention have achieved the following technical effects:

[0026] Multiple spunlace reinforcement methods can further enhance the strength of spunlace nonwovens and improve their resistance to horizontal and vertical tension.

[0027] Through multiple spunlace jacquard processes, the front and back surfaces of the spunlace non-woven fabric are made smooth and beautiful, greatly reducing the occurrence of thread shedding on the fabric. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0029] Figure 1 Flow chart of the production process of semi-cross-laid double-sided spunlace fabric in an embodiment of the present invention;

[0030] Figure 2 This is a schematic diagram of the structure of the spunlace nonwoven fabric produced in an embodiment of the present invention;

[0031] Figure 3 It is a system diagram of a semi-cross-laid double-sided spunlace fabric production system in an embodiment of the present invention;

[0032] Among them, 1. the first fiber web; 2. the second fiber web; 3. the third fiber web; 4. the fourth fiber web; 5. type A jacquard spunlace fabric; 6. type B jacquard spunlace fabric; 7. type AB jacquard spunlace fabric; 8. the first jacquard drum; 9. the second jacquard drum; 10. the third jacquard drum; 11. the spunlace head; 12. the transfer wheel; 13. the driven wheel; 14. the mesh belt; 15. the squeezing roller. DETAILED DESCRIPTION

[0033] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0034] The purpose of the present invention is to provide a semi-cross-laid double-sided spunlace fabric production process to solve the problems existing in the prior art. By compounding multiple layers of fiber webs and cross-laying the second fiber web in the middle, the strength of the spunlace non-woven fabric and its resistance to horizontal and vertical tension are improved.

[0035] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] Please refer to Figure 1 , Figure 2 As shown, a semi-cross-lapped double-sided spunlace fabric production process is provided, comprising the following steps:

[0037] S1: preparing a first fiber raw material, a second fiber raw material and a third fiber raw material by sequentially subjecting the raw materials to fiber opening, a cotton mixing box, rough opening, fine opening and an air pressure cotton box;

[0038] S2: The first fiber raw material and the third fiber raw material are combed, laid and randomly stretched by a carding machine and a drafting machine to form a first fiber web 1 and a third fiber web 3; the second fiber raw material is combed, laid, cross-laid and randomly stretched by a carding machine, a cross-lapping machine and a drafting machine to form a second fiber web 2, and the drafting ratio of the first fiber web 1, the second fiber web 2 and the third fiber web 3 in the drafting machine is 2.5-3.5 times;

[0039] S3: The first fiber web 1 and the third fiber web 3 are superimposed on both sides of the second fiber web 2, and are hydroentangled by a hydroentanglement head 11 to obtain a composite fiber web;

[0040] S4: the composite fiber web is placed in an oven for drying to obtain a spunlace nonwoven fabric;

[0041] S5: Online defect detection of spunlace nonwovens;

[0042] S6: Winding and slitting the spunlace nonwoven fabric. Specifically, the produced spunlace nonwoven fabric is wound into a roll by a winder, and is cut by a cutter on the winder to form an independent roll.

[0043] In the above process, on the basis of multi-layer fiber web composite to enhance the strength of spunlace non-woven fabric, a middle layer of second fiber web 2 is cross-laid, which can further improve the strength of spunlace non-woven fabric and effectively improve the resistance of composite fiber web to horizontal and vertical tension. At the same time, the first fiber web 1 and the second fiber web 2 do not need to be cross-laid, thereby reducing production costs.

[0044] In step S3 , in order to improve the composite effect, the second fiber web 2 is firstly composited with the first fiber web 1 by hydroentanglement to obtain the fourth fiber web 4 , and then the fourth fiber web 4 is composited with the third fiber web 3 by hydroentanglement.

[0045] The fourth fiber web 4 and the third fiber web 3 can be arranged to be spunlace-compounded after being spunlace-patterned at the first jacquard drum 8 and the second jacquard drum 9 respectively. The fourth fiber web 4 is spunlace-patterned to form an A-type jacquard spunlace fabric 5, and the third fiber web 3 is spunlace-patterned to form a B-type jacquard spunlace fabric 6. The spunlace-patterned can make the front and back surfaces of the produced spunlace nonwoven fabric smooth and beautiful, greatly reducing the occurrence of silk shedding on the fabric.

[0046] In order to further reduce the phenomenon of filament shedding on the fabric, after the fourth fiber web 4 and the third fiber web 3 are hydroentangled, they are hydroentangled again at the third jacquard drum 10 to form an AB-type jacquard hydroentangled fabric 7 .

[0047] The AB-type jacquard spunlace fabric 7 is reinforced by multiple spunlaces due to the spunlace compound and spunlace jacquard. The multiple spunlace reinforcement method can further enhance the strength of the spunlace nonwoven fabric and improve the resistance to horizontal and vertical tension.

[0048] In this embodiment, before the first fiber web 1 and the second fiber web 2 are hydroentangled, they are preliminarily extruded and compounded using two squeezing rollers 15 that cooperate with each other up and down or three squeezing rollers 15 that are in a shape of a triangle. Before the fourth fiber web 4 and the third fiber web 3 are compounded, they are preliminarily extruded and compounded using two squeezing rollers 15 that cooperate with each other up and down or three squeezing rollers 15 that are in a shape of a triangle. The setting of preliminarily extruding and compounding can further improve the compounding effect between the fiber webs.

[0049] In step S3, negative pressure adsorption is used to transport the fiber web, so that the fiber web is flat and does not curl. The specific method of negative pressure adsorption transport is: a transfer wheel 12 and at least one driven wheel 13 cooperating with the transfer wheel 12 are provided, and a mesh belt 14 with holes is provided on the transfer wheel 12 and the driven wheel 13. The transfer wheel 12 rotates to drive the mesh belt 14 to move, and an additional negative pressure fan is provided to provide negative pressure suction from the inner side of the mesh hole of the mesh belt 14, so that the fiber web can be adsorbed on the mesh belt 14 for transportation.

[0050] In step S1, the raw materials of the first fiber raw material, the second fiber raw material and the third fiber raw material are a mixture of one or more of polyester, viscose fiber, polypropylene fiber or cotton fiber. The raw materials of the first fiber raw material, the second fiber raw material and the third fiber raw material can be the same or different.

[0051] In step S5, the online defect detection includes metal detection, defect detection and X-ray detection.

[0052] Metal detection can be done with a metal detector. Defect detection uses a high-intensity light source and a CCD camera to scan the spunlace non-woven fabric passing at high speed, and records the defect distribution and size of the fabric in real time. The defect size is screened by a computer, and the system finds the defects that need to be removed and gives the coordinates of the defects. X-ray detection uses an inspection vehicle to drive the inspection equipment to run along the fiber web to perform real-time detection of the surface density of the fiber web, and analyzes the actual surface density of the fiber web and its CV value in real time, and feeds it back to the system. The system automatically adjusts the relationship curve between the position of the web laying trolley and the doffer of the front carding machine based on the detection.

[0053] Please refer to Figure 3As shown, the system used in the semi-interlaced double-sided spunlace fabric production process in this embodiment includes an extrusion roller 15, a spunlace head 11, a transfer wheel 12, a driven wheel 13, a first jacquard drum 8, a second jacquard drum 9 and a third jacquard drum 10, and each jacquard drum is correspondingly provided with a transfer wheel 12 and a driven wheel 13, and a mesh belt 14 with holes is sleeved on the transfer wheel 12 and the driven wheel 13, and a negative pressure fan is arranged on the inner side of the mesh belt 14 to provide negative pressure for the mesh belt 14, thereby adsorbing the fiber web to move, and an extrusion roller 15 for preliminary compounding of the first fiber web 1 and the second fiber web 2 is arranged in front of the first jacquard drum 8, and an extrusion roller 15 for extruding and preliminary compounding of the fourth fiber web 4 and the third fiber web 3 is arranged in front of the third jacquard drum 10.

[0054] Adaptive changes made according to actual needs are all within the protection scope of the present invention.

[0055] It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any reference numerals in the claims should not be regarded as limiting the claims involved.

[0056] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A production process for semi-cross-laid double-sided spunlace fabric, characterized in that: The following steps are involved: S1: preparing a first fiber raw material, a second fiber raw material and a third fiber raw material; S2: The first fiber raw material and the third fiber raw material are carded, laid and randomly stretched to form a first fiber web and a third fiber web; the second fiber raw material is carded, laid, cross-laid and randomly stretched to form a second fiber web; S3: The first fiber web and the third fiber web are superimposed on both sides of the second fiber web, and are hydroentangled to obtain a composite fiber web; S4: drying the composite fiber web to obtain a spunlace nonwoven fabric; S5: Online defect detection of spunlace nonwovens; S6: Winding and slitting the spunlace nonwoven fabric.

2. The production process of semi-cross-lapped double-sided spunlace fabric according to claim 1, characterized in that: In step S3, the second fiber web is firstly hydroentangled with the first fiber web to obtain a fourth fiber web, and the fourth fiber web is then hydroentangled with the third fiber web.

3. The production process of semi-cross-lapped double-sided spunlace fabric according to claim 2, characterized in that: The fourth fiber web and the third fiber web are respectively subjected to hydroentanglement jacquard patterning and then hydroentangled composite.

4. The production process of semi-cross-lapped double-sided spunlace fabric according to claim 3, characterized in that: After the fourth fiber web is hydroentangled with the third fiber web, hydroentanglement jacquard patterning is performed again.

5. The production process of semi-cross-lapped double-sided spunlace fabric according to claim 2, characterized in that: The first fiber web and the second fiber web are preliminarily extruded and composited before being hydroentangled, and the fourth fiber web and the third fiber web are preliminarily extruded and composited before being composited.

6. The production process of semi-cross-lapped double-sided spunlace fabric according to claim 1, characterized in that: In step S3, negative pressure adsorption is used to transport the fiber web, and the fiber web is flat and has no curling.

7. The production process of semi-cross-lapped double-sided spunlace fabric according to claim 1, characterized in that: In step S1, the raw materials of the first fiber raw material, the second fiber raw material and the third fiber raw material are a mixture of one or more of polyester, viscose fiber, polypropylene fiber or cotton fiber, and the raw materials of the first fiber raw material, the second fiber raw material and the third fiber raw material are the same or different.

8. The process for producing semi-cross-lapped double-sided spunlace fabric according to claim 1, characterized in that: In step S5, the online defect detection includes metal detection, defect detection and X-ray detection.

9. The production process of semi-cross-lapped double-sided spunlace fabric according to claim 8, characterized in that: Defect detection uses a high-intensity light source and a CCD camera to scan the spunlace non-woven fabric passing at high speed, and records the defect distribution and size on the fabric in real time. The defect size is screened by computer, and the system finds the defects that need to be removed and gives the coordinates of the defects.

10. The production process of semi-cross-lapped double-sided spunlace fabric according to claim 8, characterized in that: X-ray detection uses a running trolley to perform real-time detection of the surface density of the fiber web, real-time analysis of the actual surface density of the fiber web and its CV value, and feeds it back to the system. The system automatically adjusts the relationship curve between the position of the web laying trolley and the doffer of the front combing machine based on the detection.

Images