Biaxially oriented stretched web film production device and production process

Abstract

The invention discloses a biaxially oriented stretched web film production device and a production process, including a web material unwinding machine, a web material double-sided coating machine, a traction machine and a winding machine, and is characterized in that a web material with a mesh structure is used as the main structure of the web film, and a web film with a skeleton structure with a mesh structure is produced through a double-sided coating process, thereby greatly increasing the mechanical strength of the web film; the invention has the following beneficial effects: a high-temperature resistant rubber roller with a flexible surface is creatively arranged to effectively avoid the loss of mechanical strength due to the ribs and gaps in the web material caused by the rigid roller being flattened, and at the same time, the two-sided films at the gaps in the web material can also be subjected to the action of a pressing force so that the two-sided films are pressed together, thereby increasing the structural stability; a water nozzle is creatively arranged between a forming roller II and an extruder head II, while making up for the defects of the high-temperature resistant rubber roller with a flexible surface, and the degree of frosting can be adjusted by adjusting the flow rate of the water nozzle.

Description

Technical field:

[0001] The invention belongs to the technical field of polymer material processing equipment, and more specifically relates to a biaxially oriented stretched web film production device and a production process. Background technology:

[0002] Biaxially oriented polypropylene film is made by first passing the melt of high molecular weight polypropylene through a narrow and long die to form a sheet or thick film, and then stretching it in two perpendicular directions, longitudinally and transversely, simultaneously or step by step in a special stretching machine at a certain temperature and set speed, and then undergoing appropriate cooling or heat treatment or special processing such as corona, coating, etc. to make a film.

[0003] Due to the low tensile strength, impact strength, rigidity and toughness of biaxially oriented polypropylene film, a composite product of mesh and film has emerged. Especially in the packaging, construction, agriculture and other industries, the composite product of mesh and film has occupied an irreplaceable position. With the continuous development of science and technology, new plastic varieties and new molding methods are constantly being improved. At present, the method of biaxially oriented stretching mesh laminating mostly adopts the method of laminating one side and then the other side, which has low production efficiency and high labor cost.

[0004] The national invention patent with patent number 201410373997.5 discloses a method for preparing a composite film composed of a non-woven fabric and a breathable film. The method uses a rolling glue mesh roller to composite the non-woven fabric and the breathable film with hot melt adhesive. However, since the structure uses hot melt adhesive to composite the non-woven fabric and the breathable film, the efficiency and stability are poor, and in particular, the transparency cannot be adjusted. Summary of the invention:

[0005] In order to solve the above problems and overcome the shortcomings of the prior art, the present invention provides a biaxially oriented stretched web production device capable of producing a web having a biaxially oriented stretched web material, which can effectively solve the problems of lamination, poor efficiency, poor stability and unadjustable transparency.

[0006] The specific technical solution of the present invention to solve the above technical problems is: a biaxially oriented stretched web film production device, including a web material unwinding machine, a web material double-sided laminating machine, a traction machine and a winding machine, characterized in that a material storage rack is further arranged between the web material unwinding station and the web material double-sided laminating station,

[0007] The mesh double-sided laminating machine comprises a frame, in which a tangentially arranged forming roller I and a forming roller II are rotatably connected, the axes of the rotating shafts of the forming roller I and the forming roller II are both located on a horizontal line, located on both sides of the tangent line above the forming roller I and the forming roller II, and extruder heads I and II are arranged on the opposite sides;

[0008] A positioning roller for positioning the web material is also provided on the tangent line above the forming rollers I and II, and the tangent direction on one side of the positioning roller is on the same vertical line as the tangent line of the forming rollers I and II;

[0009] A cooling roller is tangentially arranged on one side of the forming roller II, and a cooling water tank is arranged below the forming roller II.

[0010] Furthermore, the forming roller I is a steel roller, the forming roller II is a rubber roller, and the forming roller I and the forming roller II are both provided with a spiral flow channel circulation cooling structure.

[0011] Furthermore, a water nozzle is arranged between the forming roller II and the extruder head II.

[0012] Furthermore, the material storage rack comprises a frame body, and a preset number of tensioning wheels for tightening the mesh material are arranged inside the frame body through a rotational connection.

[0013] Furthermore, a water receiving box is provided below the cooling water tank.

[0014] The biaxially oriented stretched web film production process is prepared according to the biaxially oriented stretched web film production device, and specifically includes:

[0015] ① Install the rolled biaxially oriented stretched mesh onto the shaft of the double-station unwinder, and then pass the mesh through the tensioning wheel of the storage rack;

[0016] ② The web material passes around the positioning roller located on the tangent line above the forming rollers Ⅰ and Ⅱ, passes through the forming rollers Ⅰ and Ⅱ, and is evenly coated on both sides of the web material by the extruder heads Ⅰ and Ⅱ located on the opposite sides of the tangent line above the forming rollers Ⅰ and Ⅱ;

[0017] ③ The double-sided coated web passes through forming rollers I and II, and then the high-temperature resistant rubber roller and the surface cooling roller are pressed by adjusting the structure to press the films coated on both sides of the web onto the web, so that the web and the film are firmly bonded. At the same time, the rubber roller squeezes out the air between the two films, so that the two layers of film are bonded together; at the same time, forming roller II is a high-temperature resistant rubber roller, and the roller surface is concave where the web has ribs by the squeezing force, and convex where there are no ribs, so that the films on both sides of the gaps in the web can also be pressed together by the pressing force;

[0018] ④ Both the forming rollers Ⅰ and Ⅱ are equipped with spiral flow circulation cooling structures to cool down the double-sided coated mesh material; open the water nozzle to spray water between the top of the rubber roller and the film to adjust the transparency of the product coated on both sides of the double-stretched mesh, and the water receiving tank collects the sprayed water;

[0019] ⑤The double-sided coated mesh material is pulled out by the traction machine and then reeled up by the reel.

[0020] The beneficial effects of the present invention are:

[0021] The mesh material with a mesh structure is used as the main structure of the mesh film, and a mesh film with a mesh skeleton structure is produced by a double-sided lamination process, thereby greatly increasing the mechanical strength of the mesh film;

[0022] Creatively set up as a high temperature resistant rubber roller with a flexible surface, effectively avoiding the loss of mechanical strength due to the ribs and gaps in the mesh material caused by the rigid roller. At the same time, the two films on the mesh gap can also be pressed by the pressing force so that the two films are pressed together, increasing the structural stability;

[0023] In order to solve the defects of the web material having ribs and gaps in the coating, the forming roller II is creatively set as a high-temperature resistant rubber roller with a flexible surface, but this brings about the problem of insufficient transparency of the film coated on the web material; a water nozzle is creatively set between the forming roller II and the extruder head II, which makes up for the defects of the high-temperature resistant rubber roller with a flexible surface, and realizes the adjustable degree of frosting by adjusting the flow rate of the water nozzle. Description of the drawings:

[0024] Attached Figure 1 It is a schematic diagram of the structure of the present invention;

[0025] Attached Figure 2 It is a structural schematic diagram of the double-sided laminating machine for mesh materials of the present invention; in the accompanying drawings:

[0026] 1. Web unwinder, 2. Material storage rack, 3. Extruder I, 4. Extruder II, 5. Web double-sided laminating machine, 6. Traction machine, 7. Winder, 8. Web, 9. Extruder head I, 10. Extruder head II, 11. Water nozzle, 12. Forming roller I, 13. Forming roller II, 14. Cooling roller, 15. Cooling water trough, 16. Water receiving tank. Specific implementation method:

[0027] In the description of the present invention, specific details are only for a full understanding of the embodiments of the present invention, but those skilled in the art should know that the implementation of the present invention is not limited to these details. In addition, well-known structures and functions are not described or shown in detail to avoid blurring the key points of the embodiments of the present invention. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] Specific implementation of the present invention:

[0029] A biaxially oriented stretched web production device, comprising a web unwinding machine 1, a web double-sided laminating machine 5, a traction machine 6 and a winding machine 7, characterized in that a material storage rack 2 is further arranged between the web unwinding station and the web double-sided laminating station, the material storage rack 2 comprising a frame body, the interior of the frame body being provided with a preset number of tensioning wheels for tightening the web 8 through a rotational connection;

[0030] The mesh double-sided laminating machine 5 comprises a frame, in which a tangentially arranged forming roller Ⅰ12 and a forming roller Ⅱ13 are rotatably connected, the axes of the rotating shafts of the forming roller Ⅰ12 and the forming roller Ⅱ13 are both located on a horizontal line, located on both sides of the tangent line above the forming roller Ⅰ12 and the forming roller Ⅱ13, and an extruder head Ⅰ9 and an extruder head Ⅱ10 are arranged on the opposite sides; the forming roller Ⅰ12 is a steel roller, and the forming roller Ⅱ13 is a rubber roller, and the forming roller Ⅰ12 and the forming roller Ⅱ13 are both provided with a spiral flow channel circulation cooling structure;

[0031] A positioning roller for positioning the web material 8 is also provided at the tangent line above the forming roller Ⅰ12 and the forming roller Ⅱ13, and the tangent direction of one side of the positioning roller is on the same vertical line as the tangent line of the forming roller Ⅰ12 and the forming roller Ⅱ13; a water nozzle 11 is also provided between the forming roller Ⅱ13 and the extruder head Ⅱ10;

[0032] A cooling roller 14 is tangentially arranged on one side of the forming roller II 13, and a cooling water tank 15 is arranged below the forming roller II 13.

[0033] The biaxially oriented stretched web film production device is prepared, specifically comprising:

[0034] ① Install the rolled biaxially oriented stretched mesh 8 onto the shaft of the double-station mesh unwinder 1, and then pass the mesh 8 through the tensioning wheel of the storage rack 2;

[0035] ② The mesh material 8 bypasses the positioning roller located at the upper tangent line of the forming rollers Ⅰ12 and Ⅱ13, passes through the forming rollers Ⅰ12 and Ⅱ13, and the extruder heads Ⅰ9 and Ⅱ10 arranged on the opposite sides of the upper tangent line of the forming rollers Ⅰ12 and Ⅱ13 perform uniform double-sided coating on both sides of the mesh material 8, thereby ensuring the stability of the production process;

[0036] ③ The double-sided coated web 8 passes through the forming roller I 12 and the forming roller II 13, and then the high-temperature resistant rubber roller and the surface cooling roller 14 are pressed by the adjusting structure to press the films coated on both sides of the web 8 onto the web 8, so that the web 8 and the film are firmly bonded. At the same time, the rubber roller squeezes out the air between the two films, so that the two layers of film are bonded together; at the same time, the forming roller II 13 is a high-temperature resistant rubber roller, and the roller surface is concave at the places where the web 8 has ribs by the squeezing force, and convex at the places without ribs, so that the films on both sides of the gaps of the web 8 can also be subjected to the pressing force and the two films are pressed together;

[0037] ④ The forming rollers Ⅰ12 and Ⅱ13 are both provided with spiral flow circulation cooling structures to cool down the double-sided coated mesh material 8; the water spray nozzle 11 is opened to spray water between the top of the rubber roller and the film to adjust the transparency of the product coated on both sides of the double-stretched mesh, and the water receiving box 16 collects the sprayed water;

[0038] ⑤ The double-sided coated web material 8 is pulled out by the traction machine 6 and then reeled up by the reeling machine 7.

[0039] The present invention creatively uses the mesh material 8 of the mesh structure as the main structure of the mesh film, and produces a mesh film with a mesh skeleton structure through a double-sided lamination process, thereby greatly increasing the mechanical strength of the mesh film;

[0040] The forming rollers Ⅰ12 and Ⅱ13 in the double-sided laminating device are creatively configured as high-temperature resistant rubber rollers with flexible surfaces, which effectively prevent the ribs from being flattened and losing mechanical strength due to the ribs and gaps in the mesh material. At the same time, the two films on the gaps of the mesh material 8 can also be pressed together by the pressing force, thereby increasing the structural stability.

[0041] In order to solve the defects of the web material having ribs and gaps in the coating, the forming roller Ⅱ13 is creatively set as a high-temperature resistant rubber roller with a flexible surface, but this brings about the problem of insufficient transparency of the film coated on the web material; a water nozzle 11 is creatively set between the forming roller Ⅱ13 and the extruder head Ⅱ10, which makes up for the defects of the high-temperature resistant rubber roller with a flexible surface, and realizes the adjustable degree of frosting by adjusting the flow rate of the water nozzle 11.

Claims

1. A biaxially oriented stretched web production process, using a biaxially oriented stretched web production device, characterized in that Specifically include: ① The biaxially oriented stretched mesh rolled web material (8) is mounted on the shaft of a double-station web material unwinding machine (1), and then the web material (8) is passed through the tensioning wheel of the storage rack (2); ② The web material (8) passes over the positioning roller located on the upper tangent line of the forming roller I (12) and the forming roller II (13), passes through the forming roller I (12) and the forming roller II (13), and the extruder head I (9) and the extruder head II (10) arranged on both sides of the upper tangent line of the forming roller I (12) and the forming roller II (13) are uniformly coated on both sides of the web material (8); ③ The web material (8) after double-sided coating passes through the forming roller I (12) and the forming roller II (13), and then the high-temperature resistant rubber roller and the surface cooling roller (14) are pressed by the adjusting structure to press the films coated on both sides of the web material (8) onto the web material (8), so that the web material (8) and the films are firmly bonded, and at the same time, the rubber roller squeezes out the air between the two films, so that the two layers of film are bonded together; at the same time, the forming roller II (13) is a high-temperature resistant rubber roller, and the roller surface is concave at the places where the web material (8) has ribs by the squeezing force, and convex at the places without ribs, so that the films on both sides of the gaps of the web material (8) can also be subjected to the pressing force and the two films are pressed together; ④ The forming rollers Ⅰ (12) and Ⅱ (13) are both provided with spiral flow channel circulation cooling structures to cool down the double-sided coated mesh material (8); the water spray nozzle (11) is opened to spray water between the top of the rubber roller and the film to adjust the transparency of the product coated on both sides of the double-stretched mesh, and the water receiving box (16) collects the sprayed water; ⑤ The double-sided coated web material (8) is pulled out by the traction machine (6) and then rolled up by the winder (7).

2. The process for producing a biaxially oriented stretched web according to claim 1, characterized in that The biaxially oriented stretched web film production device comprises a web material unwinding machine (1), a web material double-sided coating machine (5), a traction machine (6) and a winding machine (7), and is characterized in that a material storage rack (2) is provided between the web material unwinding station and the web material double-sided coating station. The web double-sided coating machine (5) comprises a frame, in which a forming roller I (12) and a forming roller II (13) are rotatably connected and arranged tangentially to each other, the axes of the rotating shafts of the forming roller I (12) and the forming roller II (13) are both located on a horizontal line, located on both sides of the tangent line above the forming roller I (12) and the forming roller II (13), and an extruder head I (9) and an extruder head II (10) are arranged on opposite sides; A positioning roller for positioning the web material (8) is also provided on the tangent line above the forming roller I (12) and the forming roller II (13), and the tangent line direction on one side of the positioning roller is on the same vertical line as the tangent line of the forming roller I (12) and the forming roller II (13); A cooling roller (14) is tangentially arranged on one side of the forming roller II (13), and a cooling water tank (15) is arranged below the forming roller II (13).

3. The process for producing a biaxially oriented stretched web according to claim 2, characterized in that The forming roller I (12) is a steel roller, the forming roller II (13) is a rubber roller, and both the forming roller I (12) and the forming roller II (13) are provided with a spiral flow channel circulation cooling structure.

4. The process for producing a biaxially oriented stretched web according to claim 2, characterized in that A water spray nozzle (11) is also provided between the molding roller II (13) and the extruder head II (10).

5. The process for producing a biaxially oriented stretched web according to claim 2, characterized in that The material storage rack (2) comprises a frame body, and a preset number of tensioning wheels for tightening the mesh material (8) are arranged inside the frame body through a rotational connection.

6. The process for producing a biaxially oriented stretched web according to claim 2, characterized in that A water receiving box (16) is also provided below the cooling water tank (15).

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