Dry method and wet method melt spinning on-line compound equipment

Abstract

The utility model discloses dry method and wet method melt spinning on-line compound equipment. The dry method and wet method melt spinning on-line compound equipment comprises a single-die-head melt spinning unit, a wet method net forming unit and a dry method net forming unit which are arranged in sequence. The single-die-head melt spinning unit forms a melt spinning fiber web, and the melt spinning fiber web is conveyed to the direction of the wet-process web forming unit through a conveying web curtain; the wet web forming unit is used for conveying wet paper sheets, transferring the wet paper sheets to a melt spinning fiber web by matching a forming web with a web rotating spunlace head, and conveying the wet paper sheets to the direction of the dry web forming unit along with a conveying web curtain; the dry web forming unit conveys a dry fiber web, and the dry fiber web is conveyed and overturned through the web conveying leather curtain to fall onto a wet paper sheet and conveyed to a reinforcing area, a drying area and a rolling area along with the web conveying leather curtain. The composite equipment disclosed by the utility model can be used for preparing a composite material by combining a dry process, a wet process and a melt spinning process.

Description

Technical Field

[0001] The utility model belongs to the technical field of textiles, and more specifically, relates to an on-line composite equipment for dry, wet and melt spinning. Background Art

[0002] Dry method, wet method and melt spinning are three common web-forming methods in the production of non-woven materials at present. Each method is applicable to different fiber raw materials, forming processes, reinforcement forming and post-treatment processes, thus endowing the materials with different application properties.

[0003] In order to meet the various requirements of the application fields, the off-line composite of dry, wet and melt-spun non-woven materials is the conventional path adopted at present. However, since each monomer has been preliminarily formed before off-line composite, the organic fusion of the three fiber webs is restricted, and the design performance of the composite product is affected. Summary of the Utility Model

[0004] Purpose of the utility model: The purpose of the utility model is to solve the deficiencies in the prior art and provide an on-line composite equipment for dry, wet and melt spinning.

[0005] Technical solution: An on-line composite equipment for dry, wet and melt spinning according to the utility model includes a single die head melt spinning unit, a wet web forming unit and a dry web forming unit arranged in sequence;

[0006] The single die head melt spinning unit forms a melt-spun fiber web and conveys it to the direction of the wet web forming unit through a conveying wire mesh curtain;

[0007] The wet web forming unit conveys a wet paper sheet and transfers the wet paper sheet to the melt-spun fiber web through a forming wire mesh and a transfer rotary water jet head, and conveys it to the direction of the dry web forming unit along with the conveying wire mesh curtain;

[0008] The dry web forming unit conveys a dry fiber web and conveys and flips it onto the wet paper sheet through a wire mesh conveyor belt and continues to convey it along with the conveying wire mesh curtain.

[0009] In some embodiments, the single die head melt spinning unit includes a hopper, an extruder, a metering pump, a spinneret plate, a filament laying and web forming device and a conveying wire mesh curtain.

[0010] In some embodiments, cooling air and stretching air are provided at the spinneret plate.

[0011] In some embodiments, the wet web forming unit includes a pulper, a pulp storage tank, a metering pump, a pulp mixing tank, a pulp pumping pump and a forming wire mesh.

[0012] In some embodiments, the angle between the inclined plane of the forming wire mesh and the conveying wire mesh curtain is 60° - 75°.

[0013] In some embodiments, the output direction of the forming wire is opposite to the output direction of the melt-spun web, and the wet paper sheet is transferred to the melt-spun web by the cooperation of the forming wire and the hydroentangling head.

[0014] In some embodiments, the dry forming unit is a carding forming device, including a bale opener, a bunker, a carding machine and a wire conveyor curtain.

[0015] In some embodiments, the inclination angle of the wire conveyor curtain is 38° - 42°.

[0016] In some embodiments, the installation direction of the carding machine is opposite to the output direction of the composite web. The dry-laid web carded out is conveyed by the wire conveyor curtain and flipped onto the wet paper sheet.

[0017] Beneficial effects: The composite device of the present utility model can combine the dry process, wet process and melt spinning processes to prepare a composite material integrating dry, wet and melt-spun materials. The preparation process is reasonable and the device is easy to operate. Description of the Drawings

[0018] Figure 1 It is the main view of the structure of the composite device according to an embodiment of the present utility model. Detailed Embodiments

[0019] The technical solutions of the present utility model will be described clearly and completely below with reference to the drawings. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art without making creative efforts based on the embodiments of the present utility model belong to the scope of protection of the present utility model.

[0020] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "inner", "outer", etc. is the orientation or positional relationship shown, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0021] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0022] The present utility model will be further described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0023] Embodiment 1

[0024] As Figure 1 shown, a dry-wet melt spinning online composite device includes a single die head melt spinning unit, a wet laying unit, and a dry laying unit arranged in sequence;

[0025] The single die head melt spinning unit forms a melt spun fiber web 9 and conveys it to the direction of the wet laying unit through a conveying wire mesh curtain 8;

[0026] The wet laying unit conveys a wet paper sheet 11 and transfers the wet paper sheet 11 to the melt spun fiber web 9 through a forming wire mesh 10 in cooperation with a transfer screen hydroentangling head 12, and conveys it to the direction of the dry laying unit along with the conveying wire mesh curtain 8;

[0027] The dry laying unit conveys a dry fiber web 14 and conveys and flips it onto the wet paper sheet 11 through a wire mesh conveying leather curtain 13, and continues to convey it along with the conveying wire mesh curtain 8.

[0028] In this embodiment, specifically, in order to ensure the uniformity of the fibers in the fiber web, as Figure 1 shown, the single die head melt spinning unit includes a hopper 1, an extruder 2, a metering pump 3, a spinneret plate 4, a fiber laying and web forming device 7, and a conveying wire mesh curtain 8.

[0029] Among them, the extruder is a four-zone screw, and the temperature of each zone is controlled separately, and the temperature control range is 190°C to 230°C. The frequency of the metering pump is selected as 25 - 30 Hz to ensure the uniformity of the fibers in the fiber web.

[0030] Among them, cooling air 5 and drawing air 6 are provided at the spinneret plate 4, and the drawing air 6 is located below the cooling air 5. The main function of the cooling air is to reduce the temperature, prevent the material from being damaged due to overheating during the processing, and at the same time contribute to the crystallization and solidification of the material. The main function of the drawing air is to stretch the polymer melt filament through positive pressure or negative pressure technology to produce ultrafine fibers.

[0031] In this embodiment, as Figure 1 shown, the wet laying unit includes a pulper, a pulp storage tank, a metering pump, a pulp mixing tank, a filling pump (not shown in the figure), and a forming wire mesh 10.

[0032] Further, in order to make the wet paper web 11 more closely adhere to the melt-spun fiber web 9, a relatively large angle of 60° to 75° is selected between the inclined surface of the wet forming screen 10 and the conveying wire mesh curtain 8. The transfer starting point of the wet paper web is as close as possible to the melt-spinning position, and the distance is controlled within 10 to 20 cm, so that the melt-spun fiber web fibers come into contact with the wet paper web 11 before being completely shaped, resulting in a morphological gradient of the fibers in the upper and lower layers of the melt-spun fiber web 9; the output speed of the wet paper web is synchronously controlled at 55 to 75 m / min.

[0033] In this embodiment, as Figure 1 shown, the output direction of the forming screen 10 is opposite to the output direction of the melt-spun fiber web 9, and the wet paper web 11 is transferred onto the melt-spun fiber web 9 by the cooperation of the forming screen 10 and the hydroentangling head 12.

[0034] In this embodiment, as Figure 1 shown, the dry forming unit is a carding forming device, including a bale opener, a bale box, a carding machine and a wire mesh conveyor 13.

[0035] Further, in order to balance the continuous operation of the low-gram-weight fiber web and the smooth flipping of the fiber web, the inclination angle of the wire mesh conveyor 13 of the carding machine is controlled at 38° to 42°, and the speed is synchronously controlled at 55 to 75 m / min.

[0036] In this embodiment, as Figure 1 shown, the installation direction of the carding machine is opposite to the output direction of the composite web. The dry-formed fiber web 14 is conveyed by the wire mesh conveyor 13, flipped and dropped onto the wet paper web 11.

[0037] In this embodiment, as Figure 1 shown, a flat screen hydroentangling structure 15 is also provided on the side of the dry forming unit. The stacked three-layer fiber web is conveyed forward by the conveying wire mesh curtain 8, reinforced by the flat screen hydroentangling structure 15 and the cylinder screen hydroentangling, and then completed the preparation of the composite material through negative pressure dehydration, drying and winding.

[0038] Embodiment 2

[0039] A working method of a dry-wet-melt spinning online composite device, including:

[0040] (1) The single die head melt spinning unit forms a melt-spun fiber web. The extruder is a four-zone screw, and the temperatures of each zone are respectively controlled, and the temperature control range is 190°C to 230°C; the metering pump frequency is selected at 25 to 30 Hz to ensure the uniformity of the fibers in the fiber web, and the output speed of the melt-spun fiber web is 55 to 75 m / min;

[0041] (2) The wet paper sheet forming unit is an inclined screen wet forming machine, which is located in front of the melt spinning unit. The transfer starting point of the wet paper sheet is close to the melt spinning spinneret position, and the distance is controlled within 10 - 20 cm. The angle between the inclined plane of the wet forming screen and the conveying wire mesh curtain is 60° - 75°. The output direction of the forming screen is opposite to that of the melt spinning screen. The wet paper sheet is transferred and falls onto the melt spun fiber web. The output speed of the wet paper sheet is synchronously controlled within 55 - 75 m / min;

[0042] (3) The dry fiber web forming unit is a carding web forming device. The installation direction of the wire mesh conveying leather curtain of the carding machine is opposite to the output direction of the composite web. The dry fiber web carded out is conveyed by the wire mesh conveying leather curtain and transferred onto the wet paper sheet. The inclination angle of the wire mesh conveying leather curtain of the carding machine is controlled within 38° - 42°, and the speed is synchronously controlled within 55 - 75 m / min;

[0043] (4) The laminated three - layer fiber web is conveyed forward by the conveying wire mesh curtain, reinforced by flat screen hydroentangling and cylinder screen hydroentangling, and then completed with composite material preparation through negative pressure dehydration, drying, and winding.

[0044] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art, without departing from the scope of the technical solution of the present invention, can make some changes or modifications to equivalent embodiments with equivalent changes by using the disclosed technical content. However, as long as it does not depart from the content of the technical solution of the present invention, any simple modification, equivalent change, and modification made to the above embodiments according to the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A dry-wet melt spinning online composite device, characterized in that: It includes a single spinneret melt spinning unit, a wet laying unit, and a dry laying unit arranged in sequence; The single spinneret melt spinning unit forms a melt spun web (9) and conveys it in the direction of the wet laying unit through a conveying wire mesh curtain (8); The wet laying unit conveys a wet paper sheet (11) and transfers the wet paper sheet (11) onto the melt spun web (9) through a forming wire mesh (10) in cooperation with a rotary screen hydroentangling head (12), and conveys it in the direction of the dry laying unit along with the conveying wire mesh curtain (8); The dry laying unit conveys a dry web (14) and conveys and flips it onto the wet paper sheet (11) through a wire mesh conveying leather curtain (13), and continues to convey it along with the conveying wire mesh curtain (8).

2. The dry-wet melt spinning online composite equipment according to claim 1, characterized in that: The single spinneret melt spinning unit includes a hopper (1), an extruder (2), a metering pump (3), a spinneret plate (4), a fiber laying and web forming device (7), and a conveying wire mesh curtain (8).

3. The dry-wet melt spinning online composite device according to claim 2, wherein: Cooling air (5) and drawing air (6) are provided at the spinneret plate (4).

4. The dry-wet melt spinning online composite device according to claim 1, characterized in that: The wet laying unit includes a pulper, a pulp storage tank, a metering pump, a pulp mixing tank, a pulp pumping pump, and a forming wire mesh (10).

5. The dry-wet melt spinning online composite device according to claim 4, characterized in that: The angle between the inclined plane of the forming wire mesh (10) and the conveying wire mesh curtain (8) is 60° - 75°.

6. The dry-wet melt spinning online composite equipment according to claim 4, characterized in that: The output direction of the forming wire mesh (10) is opposite to the output direction of the melt spun web (9), and the wet paper sheet (11) is transferred onto the melt spun web (9) through the cooperation of the forming wire mesh (10) and the hydroentangling head (12).

7. An on-line composite device for dry and wet melt spinning according to claim 1, characterized in that: The dry laying unit is a carding and web forming device, including a bale opener, a bale box, a carding machine, and a wire mesh conveying leather curtain (13).

8. An on-line composite device for dry and wet melt spinning according to claim 7, characterized in that: The inclination angle of the wire mesh conveying leather curtain (13) is 38° - 42°.

9. An on-line composite device for dry and wet melt spinning according to claim 7, characterized in that: The installation direction of the carding machine is opposite to the output direction of the composite web, and the dry web (14) carded out is conveyed by the wire mesh conveying leather curtain (13), flipped and dropped onto the wet paper sheet (11).

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