1. A method for processing a two-component spinning/devillicate lapping two-step method non-woven material is characterized by comprising the following steps: the two-step method is to carry out two-component spinning and then subdividing into nets, and comprises the following steps:

s10 melt spinning: feeding the component A and the component B into respective screw extruders for melting, extruding, filtering and metering, introducing a melt which is output after being mixed in a composite box body into a composite spinning assembly, and spraying two-component composite nascent filaments from spinneret holes;

s20 cooling and drawing: the bicomponent filament bundle formed in the S10 passes through a side-blowing cooling system, an airflow drafting system for primary drafting of the filament bundle, a differential speed drawing roller for forming bicomponent composite filament, and the bicomponent composite filament is collected and wound on a roller;

s30 devillicating: sending the tows prepared in the S20 to a multistage airflow filament separating device, and uniformly dispersing the tows into double-component monofilaments through an adjustable open nozzle under the action of stretching airflow;

s40 spinning and forming a net: laying the monofilaments subjected to S30 filament separation on a coagulation net curtain according to requirements, and adsorbing the monofilaments on the net curtain by an air suction device to form a net;

s50 reinforcement: conveying the fiber web in the S40 to a heating device through a net conveying curtain for hot air forming to form a two-component spinning/dividing and lapping two-step non-woven material;

s60 trimming and winding: and (5) cutting the non-woven material of the S50 according to requirements and collecting the cut non-woven material on a roller.

2. The processing method according to claim 1, characterized in that: in step S10, component A is PET and component B is PP-PE copolymer; the PP content in the component B is 70-95, and the PE content is 5-30; the dosage ratio of the component A to the component B is 70: 30.

3. the processing method according to claim 1, characterized in that: in the step S10, the bicomponent composite spun silk is in a skin-core structure with an outer layer of PP-PE copolymer and a core layer of PET.

4. The processing method according to claim 1, characterized in that: in step S20, the cooling air blowing temperature of the side air blowing cooling system is 10-20 ℃, and the air flow drawing temperature of the air flow drawing system is 80-120 ℃.

5. The processing method according to claim 1, characterized in that: in the step S30, the multistage airflow yarn separating device adopts high-speed airflow to form turbulent flow among fibers so as to disperse the yarn bundles step by step and achieve the purpose of uniform yarn separation; the multistage airflow devillicating comprises three stages of feeding, decelerating and diffusing; the feeding step is that the tows prepared in the step S20 are sent to a tow channel, and meanwhile, high-speed air flows act on the tows through an air channel; the deceleration is realized by high-speed airflow in the area, so that the tows are easy to disperse; the nozzle of the diffusion part is open, and the tow is subjected to the action of the decelerated air flow to form turbulent flow and is diffused.

6. The processing method according to claim 5, characterized in that: the multistage airflow silk splitting device comprises a first pressurizing box body, a second pressurizing box body and a conveying assembly.

7. The processing method according to claim 5, characterized in that: the multistage airflow silk splitting device also comprises 2-20 nozzles which are arranged in parallel, the interval between the nozzles is 20cm, the nozzles can rotate 0-360 degrees along the silk spraying direction, and the opening diameter of the nozzles is 2-10 cm.

8. The processing method according to claim 1, characterized in that: in step S40, the width of the coagulated web is 2 m.

9. The processing method according to claim 1, characterized in that: in step S50, the heating temperature for hot air shaping is 110-190 ℃.

10. A nonwoven material made by the process of any of claims 1-9.

Background

The spinning-bonding method is one of the main processes for preparing the non-woven material, and fully utilizes the principle of chemical fiber spinning forming to carry out melt spinning on a high polymer melt to directly form a net, and the non-woven material is prepared by reinforcement through mechanical, chemical or thermal bonding and the like. The structural characteristic of the spun-bonded non-woven material is that continuous filaments randomly form a fiber web, and the fiber web has good physical and mechanical properties and is widely applied to the fields of medical and health products, geosynthetic materials, filtering materials, packaging materials and the like.

With the continuous development of society, the development of non-woven geotechnical materials is faster and faster, and the traditional spun-bonded geosynthetic material has high production efficiency, lower cost and strong processability, but has lower strength, so that the development of a non-woven material with higher strength, better uniformity and more outstanding filtering performance is important; with the continuous improvement of the medical health level, people have more and more requirements on medical masks for protection, and it is still important to develop a non-woven material which can replace a spun-bonded direct spunlaid non-woven material as an outer layer of the mask.

Disclosure of Invention

Aiming at the fact that most of spun-bonded non-woven materials on the market are directly formed into a net through melt spinning (one-step method), the non-woven material provided by the invention is prepared through two-step methods of two-component spinning and then dividing and lapping, and the two-component monofilament has a skin-core structure, good mechanical properties and good crystallinity; the obtained non-woven material has the characteristics of high strength, good uniformity, few defects, good hand feeling, wide adaptability and the like.

In order to achieve the purpose, the invention adopts the following technical scheme:

a two-component spinning/devillicating lapping two-step method for processing a non-woven material, wherein the two-step method comprises the steps of firstly carrying out two-component spinning and devillicating lapping, and comprises the following steps:

s10 melt spinning: feeding the component A and the component B into respective screw extruders for melting, extruding, filtering and metering, introducing a melt which is output after being mixed in a composite box body into a composite spinning assembly, and spraying two-component composite nascent filaments from spinneret holes;

s20 cooling and drawing: the bicomponent filament bundle formed in the S10 passes through a side-blowing cooling system, an airflow drafting system for primary drafting of the filament bundle, a differential speed drawing roller for forming bicomponent composite filament, and the bicomponent composite filament is collected and wound on a roller;

s30 devillicating: sending the tows prepared in the S20 to a multistage airflow filament separating device, and uniformly dispersing the tows into double-component monofilaments through an adjustable open nozzle under the action of stretching airflow;

s40 spinning and forming a net: laying the monofilaments subjected to S30 filament separation on a coagulation net curtain according to requirements, and adsorbing the monofilaments on the net curtain by an air suction device to form a net;

s50 reinforcement: conveying the fiber web in the S40 to a heating device through a net conveying curtain for hot air forming to form a two-component spinning/dividing and lapping two-step non-woven material;

s60 trimming and winding: and (5) cutting the non-woven material of the S50 according to requirements and collecting the cut non-woven material on a roller.

Further, in step S10, component a is PET, and component B is PP-PE copolymer; the PP content in the component B is 70-95, and the PE content is 5-30; the dosage ratio of the component A to the component B is 70: 30.

further, in the step S10, the bicomponent composite spun yarn has a sheath-core structure in which the outer layer is PP-PE copolymer and the core layer is PET.

Further, in step S20, the cooling air blowing temperature of the side air blowing cooling system is 10 to 20 ℃, and the air flow drawing temperature of the air flow drawing system is 80 to 120 ℃.

Further, in the step S30, the multistage airflow yarn splitting device adopts high-speed airflow to form turbulence among fibers so as to disperse the yarn bundles step by step and achieve the purpose of uniform yarn splitting; the multistage airflow devillicating comprises three stages of feeding, decelerating and diffusing; the feeding step is that the tows prepared in the step S20 are sent to a tow channel, and meanwhile, high-speed air flows act on the tows through an air channel; the deceleration is realized by high-speed airflow in the area, so that the tows are easy to disperse; the nozzle of the diffusion part is open, and the tow is subjected to the action of the decelerated air flow to form turbulent flow and is diffused.

Furthermore, the multistage air flow silk separating device comprises a first pressurizing box body, a second pressurizing box body and a conveying assembly.

Furthermore, the multistage airflow filament separating device also comprises 2-20 nozzles which are arranged in parallel, the interval between the nozzles is 20cm, the nozzles can rotate 0-360 degrees along the filament spraying direction, and the opening diameter of each nozzle is 2-10 cm.

Further, in step S40, the width of the coagulated web curtain is 2 m.

Further, in step S50, the heating temperature for hot air shaping is 110-.

The non-woven material prepared by the processing method.

Has the advantages that: according to the invention, the high-speed airflow is adopted by the filament separating device to form turbulence among fibers so as to disperse filament bundles step by step to achieve the purpose of uniform filament separation, and the obtained monofilament has good mechanical property and good crystallinity; the non-woven material obtained by the two-step method has the characteristics of high strength, good uniformity, few defects, good hand feeling, wide adaptability and the like. The processing method of the invention has wide application, and can replace a one-step method of spun-bonded non-woven material to be used for the outer layer of the mask; can improve the defect of poor strength of the one-step spun-bonded geotechnical material and the like.

Drawings

FIG. 1 is a flow chart of a two-component spinning/dividing and lapping two-step method for processing a non-woven material.

FIG. 2 is a process flow diagram of the two-component spinning process in the processing method of the two-component spinning/devillicating-lapping two-step method for non-woven material of the invention.

FIG. 3 is a process flow diagram of filament web forming process and an exemplary diagram of nozzle rotation in the processing method of the bicomponent spinning/dividing and web laying two-step method nonwoven material of the invention.

FIG. 4 is a multi-stage air-flow yarn separating device in the processing method of the two-component spinning/yarn-separating lapping two-step method non-woven material of the invention.

FIG. 5 is a diagram of the spinning trajectory obtained by the present invention.

Reference numbers in the figures:

1 hopper, 011 component A, 012 component B, 2 motor, 3 screw extruder, 4 filter, 5 metering pump, 6 spinning die head, 7 spinning component, 8 side blowing cooling system, 081 cooling air, 9 two-component filament bundle, 10 air flow drawing system, 101 primary drawing roller, 102 low speed drawing roller, 103 high speed drawing roller, 11 roller, 12 filament bundle roller, 13 multistage air flow yarn separating device, 131 high speed air flow, 1311 one-time pressurizing, 132 air supplementing, 1321 two-time pressurizing, 133 pressure reducing dispersing, 134 movable nozzle, 14 filament, 15 air suction device, 16 screen pressing roller, 17 heating device, 18 two-component spinning/dividing and laying two-step method non-woven material, 19 screen conveying curtain and 20 roller.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides a method for processing a two-component spinning/devillicating lapping two-step method non-woven material, wherein the two-step method is a processing procedure of firstly carrying out two-component spinning and devillicating lapping.

As shown in fig. 1, the method specifically includes the following steps:

s10 melt spinning: the component A and the component B are sent into respective screw extruders 3 for melting, extruding, filtering and metering, a melt output by a composite box body enters a composite spinning component 7, and two-component composite nascent filaments are sprayed out of spinneret holes to obtain a two-component composite nascent filament structure which is a skin-core structure with an outer layer of PP-PE copolymer and a core layer of PET.

Wherein, the component A is Polyester (PET), and the component B is propylene (PP) -ethylene (PE) copolymer; the PP content in the component B is 70-95, and the PE content is 5-30; the ratio of the component A to the component B is 70: 30.

s20 cooling and drawing: and (3) allowing the bicomponent filament bundle 9 formed in the step (S10) to pass through a cross air cooling system 8, performing primary drafting on the filament bundle through an airflow drafting system, forming bicomponent composite filaments after passing through a differential speed drawing roller, and collecting and winding the bicomponent composite filaments on a roller 11.

Wherein the cooling air blowing temperature of the side air blowing cooling system is 10-20 ℃; the airflow drawing temperature of the airflow drawing system is 80-120 ℃. The differential stretching is that the bicomponent primary yarn is stretched by a low-speed roller and then is stretched by a high-speed stretching roller to form uniform bicomponent composite filament.

S30 devillicating: and (3) sending the tows prepared in the step (S20) to a multistage airflow filament separating device 13, and uniformly dispersing the tows into double-component monofilaments through an adjustable open nozzle under the action of stretching airflow. As shown in fig. 3, the multistage air-flow yarn separating device 13 adopts high-speed air flow 131 to form turbulence among fibers so as to gradually disperse the yarn bundle and achieve the purpose of uniform yarn separation; the multistage airflow devillicating comprises three stages of feeding, decelerating and diffusing; the feeding step is that the tows prepared in the step S20 are sent to a tow channel, and meanwhile, high-speed air flows act on the tows through an air channel; the deceleration is realized by high-speed airflow in the area, so that the tows are easy to disperse; the nozzle 134 of the diffuser section is open, and the decelerated air flow acts on the filament bundle to form turbulent flow and diffuse. The multistage airflow silk separating device comprises a first pressurizing box body, a second pressurizing box body and a conveying assembly.

An enlarged view of the multi-stage air-stream filament separating device is shown in fig. 4. The bicomponent filament bundle 9 is decompressed and dispersed 133 in a multistage airflow filament separating device under the action of a first pressurizing 1311 of a first pressurizing box and a second pressurizing 1321 of a second pressurizing box, and then is ejected through a spinneret orifice (nozzle).

The multi-stage airflow filament separating device comprises 2-20 parallel arranged spinneret orifices (nozzles) 134; the nozzle is an adjustable opening, and the track and the lapping mode of the monofilament lapping can be regulated and controlled according to requirements; the distance between the two nozzles is 20 cm; the open nozzle can rotate 0-360 degrees along the spinning direction; the diameter of the opening of the nozzle is 2-10 cm.

As shown in fig. 5, the nozzle of the filament separating device can rotate 0-360 degrees along the spinning direction, so that the track and the lapping mode of the monofilaments can be regulated and controlled according to requirements.

S40 spinning and forming a net: and (3) paving the monofilaments 14 subjected to yarn splitting of S30 on a coagulation net curtain according to requirements, and adsorbing the monofilaments on the net curtain by an air suction device 15 to form a net. Wherein, the width of the condensing net curtain is 2 m.

S50 reinforcement: the web in S40 is conveyed to a heating device 17 through a screen 19 for hot air forming to form a two-component spinning/devillicate lapping two-step nonwoven material 18.

Wherein the hot air shaping is carried out by a blast oven, and the heating temperature is 110-190 ℃. The two-component spinning/dividing and lapping two-step method non-woven material is a skin-core structure non-woven material with skin layer adhesion and high core layer strength.

S60 trimming and winding: the nonwoven material of S50 is slit as desired and collected on a roll 20.

Example 1

A method for processing a two-component spinning/devillicating lapping two-step method non-woven material comprises the following steps:

s10 melt spinning: feeding the component A and the component B (PP: PE = 70: 30) into respective screw extruders for melting, extruding, filtering and metering, feeding a melt output by a composite box body into a composite spinning assembly, and ejecting bicomponent composite nascent filaments from spinneret holes; s20 cooling and drawing: cooling the bicomponent tows formed in the step S10 by a 10 ℃ side-blowing cooling system, primarily drafting the tows by an 80 ℃ air flow drafting system, forming bicomponent composite filaments by a differential speed drawing roller, and collecting and winding the bicomponent composite filaments on a roller; s30 devillicating: sending the tows prepared in the step S20 to a multistage airflow filament separating device, and uniformly separating the tows into double-component monofilaments through a 5-hole type adjustable open nozzle with an open diameter of 4 cm; s40 spinning and forming a net: laying the monofilaments subjected to filament separation of S30 on a coagulation net curtain according to the back-and-forth swinging track shown in figure 3 (1), and adsorbing the monofilaments on the net curtain by an air suction device to form a net; s50 reinforcement: conveying the fiber web in S40 to a heating device through a net conveying curtain to carry out hot air setting at 110 ℃ to form a two-component spinning/dividing and lapping two-step non-woven material; s60 trimming and winding: and (5) cutting the non-woven material of the S50 according to requirements and collecting the cut non-woven material on a roller.

Example 2

A method for processing a two-component spinning/devillicating lapping two-step method non-woven material comprises the following steps:

s10 melt spinning: feeding the component A and the component B (PP: PE = 50: 50) into respective screw extruders for melting, extruding, filtering and metering, feeding a melt output by a composite box body into a composite spinning assembly, and ejecting double-component composite nascent filaments from spinneret holes; s20 cooling and drawing: cooling the bicomponent tows formed in the step S10 by a 15 ℃ side-blowing cooling system, primarily drafting the tows by a 100 ℃ air flow drafting system, forming bicomponent composite filaments by a differential speed drawing roller, and collecting and winding the bicomponent composite filaments on a roller; s30 devillicating: sending the tows prepared in the S20 to a multistage airflow filament separating device, and uniformly separating the tows into double-component monofilaments through a 9-hole type adjustable open nozzle with an open diameter of 7 cm; s40 spinning and forming a net: laying the monofilaments subjected to filament separation of S30 on a coagulation net curtain according to a spiral line shape like the track of a graph in (2) in figure 3, and adsorbing the monofilaments on the net curtain by an air suction device to form a net; s50 reinforcement: conveying the fiber web in S40 to a heating device through a net conveying curtain to carry out hot air setting at 140 ℃ to form a two-component spinning/dividing and lapping two-step non-woven material; s60 trimming and winding: and (5) cutting the non-woven material of the S50 according to requirements and collecting the cut non-woven material on a roller.

Example 3

A method for processing a two-component spinning/devillicating lapping two-step method non-woven material comprises the following steps:

s10 melt spinning: feeding the component A and the component B (PP: PE = 40: 60) into respective screw extruders for melting, extruding, filtering and metering, feeding a melt output by a composite box body into a composite spinning assembly, and ejecting double-component composite nascent filaments from spinneret holes; s20 cooling and drawing: cooling the bicomponent tows formed in the step S10 by a 15 ℃ side-blowing cooling system, primarily drafting the tows by a 110 ℃ air flow drafting system, forming bicomponent composite filaments by a differential speed drawing roller, and collecting and winding the bicomponent composite filaments on a roller; s30 devillicating: sending the tows prepared in the S20 to a multistage airflow filament separating device, and uniformly separating the tows into double-component monofilaments through an 18-hole type adjustable open nozzle with an open diameter of 10 cm; s40 spinning and forming a net: laying the filaments subjected to filament splitting of S30 on a coagulation net curtain according to the random motion track shown in (3) of figure 3, and adsorbing the filaments on the net curtain by an air suction device to form a net; s50 reinforcement: conveying the fiber web in S40 to a heating device through a net conveying curtain to carry out hot air setting at 170 ℃ to form a two-component spinning/dividing and lapping two-step non-woven material; s60 trimming and winding: and (5) cutting the non-woven material of the S50 according to requirements and collecting the cut non-woven material on a roller.

The above description is only an exemplary embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent structures or equivalent processes that are transformed by the content of the present specification and the attached drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.