High-strength breathable film forming device

Abstract

The invention discloses a high-strength breathable film forming device which is mainly composed of a needling machine, an injection mechanism, a traction roller, a hot pressing device, a collecting roller and a heating system. The injection mechanism is connected with the needling machine, and the injection mechanism injects micelles in the needling process of the non-woven fabric through the needling machine. And the non-woven fabric subjected to needling glue injection is pulled to the hot pressing device by the traction roller to be subjected to hot melting crosslinking, and the high-strength breathable film is formed and collected by the collecting device. By means of hollow needle hole extrusion and injection in the reciprocating motion process of the hollow array needle plate of the needling mechanism of the forming system, uniform and three-dimensional network tow colloid is applied to the interior and the outer layer of the non-woven fabric, the good air permeability of the non-woven fabric is guaranteed, meanwhile, the puncture resistance and the tearing strength of a fiber membrane are greatly improved, and the non-woven fabric has the good application prospect. A hot-pressing device is adopted to carry out hot-melting pressing on the needle-punched non-woven fabric, and the applied fiber micelles and the non-woven fabric main body fibers are subjected to hot-melting crosslinking, so that the fiber adhesion degree is effectively improved, and the surface quality, the wrinkle resistance and the layer peeling strength of a fiber membrane are improved.

Description

Technical Field

[0001] The invention discloses a high-strength breathable film forming device, which relates to the field of polymer material textile processing. Background Art

[0002] Breathable film is a thin film that can be permeated by air and water vapor but not by liquid. At present, my country has a huge demand for high-strength breathable films with excellent properties including waterproof and breathable, tear resistance, antibacterial, light and thin, and rubbing resistance. There is a huge demand in industries such as medical packaging, high-end protection, construction, food packaging, and high-strength protection. However, the development of the domestic high-strength breathable film industry requires new methods and technologies to achieve mass production of high-strength breathable films.

[0003] A key link in the preparation process of high-strength breathable membrane is surface gluing, which can not only improve the surface strength of the breathable membrane, but also improve its waterproofness and surface quality. However, the traditional gluing process not only makes the air permeability of the non-woven film worse, but also does not significantly improve its strength. Chinese patent CN108000997B discloses a high-strength polyester spunbond non-woven quicklime desiccant packaging film and its production method. The packaging film is composed of a spunbond non-woven fabric and a breathable membrane, but the two materials of the packaging film are connected by an adhesive, which reduces the air permeability of the film. Chinese patent CN105966016A discloses a high-strength water-blocking and breathable non-woven fabric, which is composed of two non-woven fabric layers, a reinforced waterproof and breathable layer, air holes and a reinforced fiber mesh. However, the air permeability of the high-strength water-blocking and breathable membrane is only maintained by the reinforced waterproof and breathable layer and the air holes. Therefore, the air permeability of the high-strength water-blocking and breathable membrane is poor and the strength of the high-strength water-blocking and breathable membrane needs to be supported by the reinforced fiber mesh.

[0004] Needle punching nonwoven fabrics is a key way to improve performance. The needle punching machine is installed on a mounting plate that can be raised and lowered. When the mounting plate moves downward, all the needles can be driven to puncture the nonwoven fabric, which can improve the entanglement of fibers inside the nonwoven fabric, improve the filtering performance and mechanical properties, and improve the tear resistance of the nonwoven fabric.

[0005] Compared with traditional gluing methods such as gluing, dispensing and dipping, the use of needle punching machine to apply fiber micelles to the inside of non-woven fibers can not only ensure the three-dimensional network structure inside the non-woven fabric and ensure its breathability, but also improve its puncture and tear resistance, and hot-melt bond the micelle fibers to the non-woven fibers to form a high-strength fiber cross-linking network.

[0006] At present, there is no technology and equipment for needle-punched sizing non-woven fabrics in China. In order to meet the demand of related domestic industries for high-performance non-woven film materials, this patent proposes a high-strength breathable film forming device. Summary of the invention

[0007] The present invention proposes a high-strength breathable membrane forming device, through the reciprocating motion of the hollow array needle plate of the needle punching mechanism of this forming system, the hollow needle holes are extruded and injected to achieve the uniform and three-dimensional application of network bundle colloid to the inner and outer layers of the non-woven fabric, while ensuring its good air permeability, the puncture resistance and tearing strength of the fiber membrane are greatly improved, and the needle-punched non-woven fabric is hot-melt pressed by a hot pressing device, and the applied fiber micelles are hot-melt cross-linked with the main fibers of the non-woven fabric, which effectively improves the fiber bonding degree, improves the surface quality and wrinkle resistance of the fiber membrane, and improves the layer peeling strength of the fiber.

[0008] The technical solution to achieve the above functions is: a high-strength breathable film forming device, which is mainly composed of a needle punching machine, an injection mechanism, a traction roller, a hot pressing device, a collection roller and a heating system. The injection mechanism is connected to the needle punching machine, and the injection mechanism injects micelles during the needle punching process of the non-woven fabric. The traction roller pulls the needle-punched and glue-injected non-woven fabric to the hot pressing device for hot melt cross-linking to form a high-strength breathable film and is collected by the collection device.

[0009] The needle punching machine in the high-strength breathable film forming device of the present invention is mainly composed of a frame, a reciprocating mechanism, a motor, a shock absorber, a diversion needle punching plate, a mounting plate, a stripping plate and a guide mechanism.

[0010] The reciprocating mechanism is used to drive the diverter needle plate to reciprocate along the direction of the guide mechanism, and can be composed of a connecting rod, a connecting rod and a disc, or a crank rocker mechanism.

[0011] The shock absorber is installed between the diversion needle plate and the stripping plate and fixed on the stripping plate.

[0012] The guide mechanism is a vertical slide rail fixedly installed on both sides of the frame, and sliding blocks are fixedly installed on both sides of the diversion needle plate and are slidably installed in the vertical slide rails on both sides.

[0013] The diverter needle puncture plate is composed of an upper plate, a lower plate and a heating plate. The upper plate is provided with a hot runner connected to the injection mechanism, and the top of the lower plate is provided with a diverter connected to the hot runner. The lower plate and the heating plate are provided with a plurality of array first through holes corresponding to the hot runner, and are connected to hollow needles in the holes of the lower plate and the heating plate. The heating plate is installed directly below the lower plate to heat the entire diverter needle puncture plate and the needles.

[0014] The interior of the hollow needle is a hollow through-hole flow channel, and the lower end side wall is provided with multiple barbed hooks. The hollow needles are arranged in an array on the diversion needle plate and are evenly installed in the lower plate through holes of the same size, shape and number.

[0015] The stripping plate is fixedly installed between the mounting plate and the diversion needle plate, and the stripping plate is provided with third through holes arranged along the front-to-back direction, wherein the third through holes are adapted to the shape, size and quantity of the needles.

[0016] The mounting plate is mounted at the bottom of the frame, the nonwoven fabric is transported on the mounting plate, and a fourth through hole matching the number, shape and size of needle punching is arranged on the mounting plate.

[0017] The injection mechanism of the high-strength breathable film forming device of the present invention mainly consists of an extruder, a hot runner and a piezoelectric injection valve. The colloid is added into the extruder hopper for injection, and the colloid enters the diverter channel corresponding to the array hollow needle in the diverter needle plate through the hot runner for injection.

[0018] The hot pressing device of the high-strength breathable film forming device of the present invention is composed of three-stage hot pressing rollers and a series of motors. After the system device is heated up, after the traction roller, the non-woven fabric is sequentially passed through the first-stage hot pressing roller, the second-stage hot pressing roller and the third-stage hot pressing roller. The non-woven fabric forms a high-strength breathable film at this stage and is finally collected into a roll by the winding roller.

[0019] The present invention discloses a high-strength breathable film forming device. The non-woven fabric is transported to the mounting plate of the needling machine. The motor drives the reciprocating mechanism to drive the diverter needling plate to reciprocate along the direction of the guide mechanism. The array hollow needles penetrate the matching through holes of the stripping plate to puncture the non-woven fabric. At the same time, the micelles are extruded into the hot runner through the extruder. The reciprocating motion of the diverter needling plate transmits the pressure signal to the piezoelectric injection valve and converts it into an electrical signal. The piezoelectric injection valve is triggered to inject a quantitative amount of micelles into the diverter array plate with a heating function. The micelles are then evenly distributed to the array hollow needles through the diverter channels in the diverter array plate. The array hollow needles penetrate the non-woven fabric. The side of the needles The surface hook drives the surface layer of the fiber web, and the fibers are entangled with each other due to relative displacement, and squeezed together at the same time. At the same time, the hollow flow channel of the needle injects the colloid into the non-woven fibers during the needling process to form fiber micelles, which are evenly applied to the outer surface and internal fiber structure of the non-woven fabric to form a non-woven fabric with external point-coated colloid and internal three-dimensional fiber micelles. The non-woven fabric that has been needle-punched and glued by the needling machine is pulled to the hot pressing device by the subsequent traction roller. The three-stage roller of the hot pressing device can be set with different draft ratios and pressing gaps to heat and press the non-woven fabric to achieve hot melt cross-linking and form a high-strength breathable film, which is then collected by the collecting roller.

[0020] The main advantages of the high-strength breathable film forming device of the present invention are:

[0021] (1) The acupuncture device is creatively combined with the injection device, which has a simple structure, is safe and environmentally friendly, and has strong operability.

[0022] (2) The non-woven fabric coating process and the needle punching process are concentrated on one device to increase production speed and reduce production costs.

[0023] (3) A hot pressing device is combined with a needle puncture device and an injection device to weld and cross-link the non-woven fabric after vertical puncture and gluing. Compared with the processes of gluing, surface coating, and dipping, it has better mechanical properties and breathability.

[0024] (4) The fiber preparation process is a one-step process with a reasonable process system structure, simple operation, and suitable for industrial production.

[0025] (5) The device has strong adaptability and can process a variety of materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings are used to further understand the present invention and constitute a part of the specification, and together with the following specific embodiments, are used to explain the present invention. The equipment and process in the accompanying drawings are only specific examples of one of the processes in the description and do not constitute a limitation of the present invention.

[0027] Figure 1 The figure is a front view of a high-strength breathable film forming device of the present invention.

[0028] Figure 2 The figure is a top view of a high-strength breathable film forming device of the present invention.

[0029] Figure 3 It is a front view of the hollow needle structure of a high-strength breathable film forming device of the present invention.

[0030] Figure 4 A top view of the upper plate of a diverter needle punching plate of a high-strength breathable film forming device of the present invention

[0031] Figure 5 The present invention provides a top view of a lower plate of a diversion needle punching plate of a high-strength breathable film forming device.

[0032] In the figure: 1-frame, 2-reciprocating mechanism, 201-crank, 202-rocker, 3-motor, 4-shock absorber, 5-diverter needle plate, 501-upper plate, 502-lower plate, 503-heating plate, 504-main hot runner, 505-diverter, 506-first through hole, 507-hollow needle, 508-threaded hole, 509-second through hole, 6-mounting plate, 7-stripping plate, 8-guide mechanism, 9-extruder, 10-hot runner 10, 11-piezoelectric injection valve, 12-traction roller 12, 13-hot pressing device, 1301-first-level hot pressing roller, 1302-second-level hot pressing roller, 1303-third-level hot pressing roller, 14-winding roller. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0034] To facilitate understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. An embodiment of the present invention is shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0035] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "page", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0036] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Thus, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the features.

[0037] In the description of the present invention, “plurality” means two or more than two, unless otherwise clearly and specifically defined.

[0038] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed", "provided with" and the like 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 a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this patent can be understood according to the specific circumstances.

[0039] Example

[0040] The invention discloses a high-strength breathable film forming device, which is mainly composed of a needle punching machine, an injection mechanism, a traction roller 12, a hot pressing device 13, a collecting roller 14 and a heating system. The injection mechanism is connected to the needle punching machine, and the injection mechanism injects micelles during the needle punching process of the non-woven fabric. The traction roller pulls the needle-punched and glue-injected non-woven fabric to the hot pressing device for hot melt cross-linking to form a high-strength breathable film, which is then collected by the collecting device.

[0041] The needling machine of the high-strength breathable film forming device of the present invention mainly comprises a frame 1, a reciprocating mechanism 2, a motor 3, a shock absorber 4, a diverter needling plate 5, a mounting plate 6, a stripping plate 7 and a guide mechanism 8.

[0042] The reciprocating mechanism is composed of a crank-rocker mechanism. The output end of the motor 3 is connected to one end of the crank 201, the other end of the crank is connected to the rocker 202, and the other end of the rocker 202 is connected to the diversion needle plate 5. The motor 3 drives the crank 201 to rotate, driving the rocker 202 to swing back and forth, thereby driving the diversion needle plate 5 to reciprocate.

[0043] The shock absorber 4 is composed of a spring and a guide column, installed between the diverter needle plate 5 and the stripping plate 7, and fixed at the four corners of the stripping plate, which can reduce vibration and improve movement stability.

[0044] The guide mechanism 8 is two vertical slide rails fixedly installed on both sides of the frame, and sliding blocks are fixedly installed on both sides of the diversion needle plate and are slidably installed in the vertical slide rails on both sides.

[0045] The splitting needle plate 5 is composed of an upper plate 501, a lower plate 502 and a heating plate 503. The upper plate is provided with a main hot runner 504 connected to the injection mechanism. The top of the lower plate 502 is provided with a splitting channel 505 connected to the main hot runner 504 and corresponding to a plurality of array first through holes 506. The hollow needles 507 are arrayed on the lower plate. Threaded holes 508 are provided between the plates and connected by bolts. The splitting needle plate is provided with a second through hole 509 that matches the shape, size and number of the shock absorber guide column.

[0046] The shunt needle plate 5 is composed of an upper plate 501, a lower plate 502 and a heating plate 503. The upper plate is provided with a main hot runner 504 connected to the injection mechanism. The top of the lower plate 502 is provided with a shunt channel 505 connected to the hot runner. The lower plate and the heating plate are provided with a plurality of array first through holes 506 corresponding to the hot runner, and threads are provided in the holes of the lower plate and the heating plate for convenient threaded connection with the hollow needle. The heating plate is installed directly below the lower plate, and electromagnetic heating is used to electromagnetically heat the entire shunt needle plate and the needle. The upper plate, the lower plate and the heating plate are connected by bolts.

[0047] The hollow needle 507 has a hollow through-hole flow channel inside, and a plurality of barbed hooks are arranged on the lower side wall. The hollow needles are arranged in an array on the diversion needle plate. The diversion needle plate is provided with a second through hole 509 that matches the shape, size and number of the shock absorber guide column.

[0048] The hollow needle 507 is an ordinary needle, and the main body is in the shape of a hollow cylinder, with a mounting portion on the top, a plurality of barbed hooks on the side wall of the lower end, and a conical structure at the bottom end for easy insertion into the non-woven fabric. A through-hole flow channel is provided inside, and the total length of the needle is 1 to 20 cm, and there is no curved handle at the top of the needle.

[0049] The stripping plate 7 is fixedly installed between the mounting plate 6 and the diversion needle punching plate 5, and is provided with third through holes arranged along the front-to-back direction, wherein the third through holes are adapted to the shape, size and number of the needles, and are used to separate the fibers entangled by needle punching in the diversion needle punching plate and peel off the non-woven fabric adhered to the needle punching plate.

[0050] The mounting plate 6 is mounted at the bottom of the frame 1, and the nonwoven fabric is transported thereon. The mounting plate 6 is provided with a fourth through hole adapted to the number, shape and size of the needle punches.

[0051] The injection mechanism of the high-strength breathable film forming device of the present invention is mainly composed of an extruder 9, a hot runner 10, and a piezoelectric injection valve 11. The colloid is added into the hopper of the extruder 9 for injection, and the colloid enters the diverter needle plate 5 through the hot runner 10 for injection. The piezoelectric injection valve 11 is arranged in the middle of both ends of the hot runner 10, and the pulse signal is transmitted through the reciprocating motion of the needle diverter plate 5 to realize accurate and rapid colloid injection.

[0052] The hot pressing device 13 of the high-strength breathable film forming device of the present invention is composed of a first-stage hot pressing roller 1301, a second-stage hot pressing roller 1302 and a third-stage hot pressing roller 1303. After the system device is heated up, the non-woven fabric passes through the first-stage hot pressing roller 1301, the second-stage hot pressing roller 1302 and the third-stage hot pressing roller 1303 in sequence after the traction roller 12. At this stage, the non-woven fabric will be hot-pressed to form a high-strength breathable film with a dense surface by combining the non-woven fabric fibers and the internal and external three-dimensional network structure formed by the fiber micelles produced in the needle punching machine, effectively improving the mechanical properties and puncture resistance of the non-woven fabric. The breathable film is finally collected into a roll by the winding roller 14.

Claims

1. A high-strength breathable film forming device, characterized in that: It is mainly composed of a needle loom, an injection mechanism, a traction roller, a hot pressing device, a collecting roller and a heating system. The injection mechanism is connected to the needle loom. When the non-woven fabric passes through the needle loom, the injection mechanism injects micelles. The traction roller pulls the needle-punched and glue-injected non-woven fabric to the hot pressing device for hot melt cross-linking to form a high-strength breathable film which is collected by the collecting device.

2. A high-strength breathable film forming device according to claim 1, characterized in that: The needling machine is mainly composed of a frame, a reciprocating mechanism, a motor, a shock absorber, a diverter needling plate, a mounting plate, a stripping plate and a guide mechanism; the reciprocating mechanism is used to drive the diverter needling plate to reciprocate along the direction of the guide mechanism, and is composed of a connecting rod, a connecting rod and a disc, or a crank rocker mechanism; the shock absorber is installed between the diverter needling plate and the stripping plate, and is fixed on the stripping plate; the guide mechanism is a vertical slide rail fixedly installed on both sides of the frame, and at the same time, the sliders fixedly installed on both sides of the diverter needling plate are respectively slidably installed in the vertical slide rails on both sides; the diverter needling plate is composed of an upper plate, a lower plate and a heating plate, the upper plate is provided with a hot runner connected to the injection mechanism, the top of the lower plate is provided with a diverter connected to the hot runner, the lower plate and the heating plate are provided with a plurality of array first through holes corresponding to the hot runner, and are connected to the hollow needles in the holes of the lower plate and the heating plate, and the heating plate is installed directly below the lower plate to heat the entire diverter needling plate and the needles.

3. A high-strength breathable film forming device according to claim 2, characterized in that: The interior of the hollow needle is a hollow through-hole flow channel, and the side wall of the lower end is provided with multiple barbed hooks. The hollow needles are arranged in an array on the diversion needling plate and are evenly installed in the through holes of the lower plate with the same size, shape and number; the stripping plate is fixedly installed between the mounting plate and the diversion needling plate, and the stripping plate is provided with third through holes arranged along the front and rear directions, wherein the third through holes are adapted to the shape, size and number of the needles; the mounting plate is installed at the bottom of the frame, the non-woven fabric is transported on the mounting plate, and a fourth through hole adapted to the number, shape and size of the needling is provided on the mounting plate.

4. A high-strength breathable film forming device according to claim 3, characterized in that: The injection mechanism is mainly composed of an extruder, a hot runner and a piezoelectric injection valve. The colloid is added into the extruder hopper for injection. The colloid enters the diverter channel corresponding to the array hollow needles in the diverter needle plate through the hot runner for injection. The hot pressing device is composed of a three-stage hot pressing roller and a series of motors. After the system device is heated up, after passing through the traction roller, the non-woven fabric is sequentially passed through the first-stage hot pressing roller, the second-stage hot pressing roller and the third-stage hot pressing roller. The non-woven fabric forms a high-strength breathable film at this stage and is finally collected into a roll by the winding roller.

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