Compensation type drip infiltration belt manufacturing method

Abstract

The invention discloses a method for manufacturing a compensation type drip irrigation tape, which belongs to the technical field of drip irrigation tapes, and comprises the following steps: manufacturing the compensation type drip irrigation tape which is a plastic film pipe tape comprising a first layer of single-sheet film, a second layer of single-sheet film and a third layer of single-sheet film, the second layer of single-piece film is clamped between the first layer of single-piece film and the second layer of single-piece film, first kerfs are cut in the length direction of the first layer of single-piece film at intervals, second kerfs are cut in the length direction of the second layer of single-piece film at intervals, the first kerfs are located at the half position between every two adjacent second kerfs in the interval arrangement direction, and the second kerfs are located at the half position between every two adjacent second kerfs in the interval arrangement direction. Turbulent flow channel patterns are printed on one surface, facing the first layer of single-sheet film, of the second layer of single-sheet film, and the turbulent flow channel patterns are dot-shaped patterns arranged in a matrix manner. The drip irrigation tape manufactured by the manufacturing method of the compensation type drip infiltration tape has water pressure compensation, and can ensure that the water outlet flow of the first cutting seam is uniform and stable and the first cutting seam is not easy to block, so that the laying distance can be prolonged, and the problem of use limitation is solved.

Description

Technical Field

[0001] The invention relates to the technical field of drip irrigation belts, in particular to a method for manufacturing a compensating drip irrigation belt. Background Art

[0002] Drip irrigation tape (also known as drip tape) is a plastic pipe with a very small outflow orifice on the pipe body. The diameter of the outflow orifice is usually less than 10mm. Through the outflow orifice on the drip irrigation tape, water can drip evenly and slowly into the soil near the roots of crops. The use of drip irrigation tape will not destroy the soil structure. The water, fertilizer, air and heat inside the soil are always kept in a good condition suitable for crop growth. The evaporation loss is small, no surface runoff is generated, and there is almost no deep leakage. It is a water-saving irrigation method. It is currently the most effective water-saving irrigation method in arid and water-scarce areas, and the water utilization rate can reach 95%. However, the current drip irrigation tape does not have a water pressure compensation function, so the outflow orifice is easy to block, the water output is uneven, the laying distance is short, and the use is limited. Summary of the invention

[0003] The purpose of the present invention is to solve the above-mentioned technical problems and to provide a method for producing a compensating drip irrigation tape. The drip irrigation tape produced by this method includes three layers of monolithic membranes, a water flow channel is formed between the first layer of monolithic membranes and the second layer of monolithic membranes, and a turbulent flow channel pattern is printed on the second layer of monolithic membrane, which can compensate for the water pressure in the water flow channel to ensure that the water flow rate of the first cut on the first layer of monolithic membrane is uniform, stable and not easy to be blocked, thereby extending the laying distance and solving the problem of limited use.

[0004] To achieve the above object, the present invention provides the following solution: The present invention discloses a method for making a compensating drip tape, which is characterized by comprising the following steps: A compensating drip tape is manufactured, wherein the compensating drip tape is a plastic film tube tape, wherein the plastic film tube tape comprises a first layer of monolithic film, a second layer of monolithic film and a third layer of monolithic film, wherein the second layer of monolithic film is sandwiched between the first layer of monolithic film and the second layer of monolithic film, wherein first slits are cut at intervals along the length direction of the first layer of monolithic film, wherein the first slits are located at half of the width direction of the first layer of monolithic film, wherein second slits are cut at intervals along the length direction of the second layer of monolithic film, wherein the second slits are located at half of the width direction of the second layer of monolithic film, wherein the first slits are located at half of the width direction of the second layer of monolithic film, wherein the first slits are located at half of the distance between two adjacent second slits in their spacing arrangement direction, and wherein a turbulent flow channel pattern is printed on a surface of the second layer of monolithic film facing the first layer of monolithic film.

[0005] Preferably, the turbulent flow channel pattern is a dot pattern arranged in a matrix, the row and column directions of the dot pattern are respectively parallel to the width direction and the length direction of the second layer of the single film, and the connecting line of a column of the dot pattern coincides with the connecting line of the second slits.

[0006] Preferably, the steps include: Blowing a single-layer wide film, dividing the single-layer wide film into two single films along the width direction, respectively serving as the second-layer single film and the third-layer single film, printing a turbulent flow channel pattern on the second-layer single film, and then cutting the second-layer single film with the second slit; Blowing a single-layer narrow film sheet, wherein the width of the blown single-layer narrow film sheet is half of the width of the single-layer wide film sheet, and the first layer of the single-layer film sheet is used as the first layer of the single-layer film, and the first slit is cut on the first layer of the single-layer film; Compounding the wide sides of the first monolithic film and the second monolithic film, with the side of the second monolithic film printed with the turbulent flow channel pattern facing the first monolithic film; The first layer of monolithic film and the second layer of monolithic film after compounding are thermally compounded with the wide side of the third layer of monolithic film to form a plastic film tube belt, wherein the side of the second layer of monolithic film without the turbulent flow channel pattern printed thereon faces the third layer of monolithic film; The plastic film tube tape was wound into a coil.

[0007] Preferably, two film blowing machines are used to blow mold the single-layer wide film sheet and the single-layer narrow film sheet respectively, or a single film blowing machine with double film blowing heads is used to blow mold the single-layer wide film sheet and the single-layer narrow film sheet respectively.

[0008] Preferably, the single-layer wide film is pulled by a traction roller and cut by a slitting knife to be evenly divided into a second layer of single-piece film and a third layer of single-piece film. The second layer of single-piece film and the third layer of single-piece film are separated up and down by guide rollers, and the third layer of single-piece film continues to move forward via a guide rail. The second layer of single-piece film is pressed with a turbulent channel pattern on its top surface by an embossing roller, and then the second layer of single-piece film is cut by a roller-type slitting knife wheel for a second slit.

[0009] Preferably, the first layer of monolithic film is pulled to the top of the second layer of monolithic film by a traction roller, the first layer of monolithic film and the second layer of monolithic film are pulled to a composite film machine by clamping rollers for composite, the composited first layer of monolithic film and the second layer of monolithic film are pulled to the top of the third layer of monolithic film by traction rollers, and the wide edges of the first layer of monolithic film, the second layer of monolithic film and the third layer of monolithic film are hot-melt-seamed or hot-melt-slit by a hot-melt knife to form a plastic film tube belt.

[0010] Preferably, the hot-melted plastic film tube is sent to a winding machine through two traction rollers to be wound into a disk.

[0011] Preferably, the steps include: Blowing a single-layer wide film, dividing the single-layer wide film into two single films along the width direction, respectively serving as the first layer of single film and the second layer of single film, cutting the first slit on the first layer of single film, printing a turbulent flow channel pattern on the second layer of single film, and then cutting the second slit on the second layer of single film; Blowing a single-layer narrow film, wherein the width of the blown single-layer narrow film is half the width of the single-layer wide film, as the third layer of the single-layer film; Compounding the wide sides of the first monolithic film and the second monolithic film, with the side of the second monolithic film printed with the turbulent flow channel pattern facing the first monolithic film; The first layer of monolithic film and the second layer of monolithic film after compounding are thermally compounded with the wide side of the third layer of monolithic film to form a plastic film tube belt, wherein the side of the second layer of monolithic film without the turbulent flow channel pattern printed thereon faces the third layer of monolithic film; The plastic film tube tape was wound into a coil.

[0012] Preferably, the steps include: A single-layer film is blown, and the single-layer film is wound into a roll along the length direction, and is cut into three single-layer films with the same width, respectively serving as a first layer of single-layer film, a second layer of single-layer film, and a third layer of single-layer film, the first layer of single-layer film is cut with the first slit, the second layer of single-layer film is printed with a turbulent flow channel pattern, and then the second layer of single-layer film is cut with the second slit, the wide edges of the first layer of single-layer film, the second layer of single-layer film, and the third layer of single-layer film are thermally laminated, and after thermal lamination, hot-melt slitting or knife cutting is performed to obtain the plastic film tube strip, and the plastic film tube strip is wound into a disk.

[0013] Preferably, the steps include: A blown single-layer film is divided into three areas in sequence along the width direction, which are respectively used as a second layer of single-layer film, a first layer of single-layer film and a third layer of single-layer film, the first layer of single-layer film is cut on the first layer of single-layer film, a turbulent flow channel pattern is printed on the second layer of single-layer film, and then the second layer of single-layer film is cut with the second slit, the blown single-layer film is folded along the dividing line between the second layer of single-layer film and the first layer of single-layer film, the edges of the second layer of single-layer film and the first layer of single-layer film are thermally composited, the blown single-layer film is folded along the dividing line between the first layer of single-layer film and the third layer of single-layer film, the edges of the third layer of single-layer film and the second layer of single-layer film are thermally composited, and the plastic film tube is obtained, and the plastic film tube is wound into a disk.

[0014] Compared with the prior art, the present invention has achieved the following technical effects: The drip irrigation tape produced by the compensation drip irrigation tape production method of the present invention has water pressure compensation, uniform and stable water flow, and the water outlet is not easy to be blocked. The specific drip irrigation tape includes three layers of monolithic membranes, a water flow channel is formed between the first monolithic membrane and the second monolithic membrane, and a turbulent flow channel pattern is printed on the second monolithic membrane. After the water flows into the water flow channel from the second slit of the third monolithic membrane and the second monolithic membrane, the turbulent flow channel pattern has a turbulent effect on the water flow, thereby compensating for the water pressure in the water flow channel, ensuring that the water flow of the first slit on the first monolithic membrane is uniform, stable and not easy to be blocked, thereby extending the laying distance and solving the problem of limited use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] 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 work.

[0016] Figure 1 It is a schematic structural diagram of the compensating dripping belt in the embodiment; Figure 2 Schematic diagram of the structure of the first monolithic membrane in the embodiment; Figure 3 is a schematic diagram of the structure of the second monolithic film in the embodiment; Figure 4 is a schematic structural diagram of the third monolithic membrane in the embodiment; Figure 5 Schematic diagram of the structure after the first layer of monolithic film and the second layer of monolithic film are laminated in the embodiment; Figure 6 It is a schematic diagram of the process of implementing method 1 of the compensating drip tape manufacturing method in the embodiment; Figure 7 It is a schematic diagram of the process of the second implementation method of the compensating drip tape manufacturing method in the embodiment; Figure 8 It is a process schematic diagram of implementation mode 3 of the method for making a compensating drip tape in the embodiment; Fig. 9 It is a schematic diagram of the process of implementation mode 4 of the method for making a compensating drip tape in the embodiment.

[0017] Explanation of the accompanying drawings: 1. first layer of single-piece film; 2. second layer of single-piece film; 3. third layer of single-piece film; 4. first slit; 5. second slit; 6. dot pattern. DETAILED DESCRIPTION

[0018] 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.

[0019] This embodiment provides a method for making a compensating dripping belt. Figures 1 to 9 As shown, the following steps are included: A compensating drip tape is manufactured. The compensating drip tape is a plastic film tube tape, which includes a first monolithic film 1, a second monolithic film 2, and a third monolithic film 3. The second monolithic film 2 is sandwiched between the first monolithic film 1 and the second monolithic film 3. The first slits 4 are cut at intervals along the length direction of the first monolithic film 1. The first slits 4 are located at half of the width direction of the first monolithic film 1. The second slits 5 are cut at intervals along the length direction of the second monolithic film 2. The second slits 5 are located at half of the width direction of the second monolithic film 2. The first slit 4 is located at half of the distance between two adjacent second slits 5 in the spacing arrangement direction, that is, the first monolithic film 1 and the second monolithic film 2 are attached together, and the first slits 4 and the second slits 5 are on the same longitudinal straight line. A turbulent flow channel pattern is printed on the side of the second monolithic film 2 facing the first monolithic film 1.

[0020] The following adjustments can be made according to the method of making the compensating drip tape: (1) The shape of the turbulent channel pattern can be set as required, and can be a dot pattern 6 or a pattern of other shapes. The dot pattern can be a dot shape, a polygonal dot shape, etc. It is beneficial to the flow calculation and pre-simulation molding, and has anti-blocking properties. The depth of the dot pattern is required to be designed according to the thickness of the membrane to ensure the water pressure resistance of the dripping zone.

[0021] (2) The water flow rate of the drip zone can also be adjusted by adjusting the width of the water channel, that is, the diameter of the hollow space between the second layer of monolithic membrane 2 and the second layer of monolithic membrane 2, such as 16 mm, 20 mm and other sizes formed after water inflow, depending on the diameter formed by water inflow.

[0022] (3) The slit interval between the first slit 4 and the second slit 5 is determined according to the flow interval distance of the turbulent flow channel design. The slit lengths of the first slit 4 and the second slit 5 are the same, and the slit length is set according to actual needs. Preferably, the first slit length is 2-3 mm.

[0023] (4) The material of the plastic film tube can be selected from one or more of HDPE, LDPE, LLDPE, PP, and EVA, wherein HDPE is high-density polyethylene, LDPE is low-density polyethylene, LLDPE is linear low-density polyethylene, PP is polypropylene, and EVA is ethylene-vinyl acetate copolymer.

[0024] A variety of raw materials can be selected by ABA compounding, AB compounding or ABC compounding. ABA compounding can be compounded by LLDPE, PP and LLDPE, AB compounding can be compounded by LLDPE and HDPE. ABC compounding can be compounded by HDPE, LLDPE and PP. The scientific proportion is mainly based on the product thickness, diameter water pressure, geographical soil, climate and temperature requirements. For example, in hilly gravel land and high temperature desert geographical conditions, materials with high tear resistance and temperature resistance are used for compounding, cast and recycled materials are used as production raw materials, and they should be reasonably selected according to the conditions and service life of the drip tape produced.

[0025] The plastic film used in the plastic film tube needs to be blown with a suitable film blowing machine: for example, two film blowing machines can be used for AB material composites, two film blowing machines can be used for ABA material composites, and three film blowing machines can be used for ABC material composites. The material combination options are mainly based on several points: according to the use characteristics of the drip tape, such as the requirements for tear resistance and water pressure processing and molding, according to the material properties, the use of elastic materials in the turbulent channel film layer can produce water pressure compensation. The film blowing machine for PE materials and LLDPE materials can be divided into several heating sections. The first zone of the film blowing machine feeding section is 150C°, the second zone is 170C°, the third zone is 190C°, the fourth zone is 205C°, the fifth zone is 200C°, the head connector is 190C°, the head spiral is 200C°, the head die is 190C°, and the HDPE film blowing material has a processing temperature higher than LLDPE by 10C°.

[0026] In one embodiment, if Figures 1 to 9 As shown, the turbulent flow channel pattern is a dot pattern 6 arranged in a matrix, and the row and column directions of the dot pattern 6 are respectively parallel to the width direction and the length direction of the second layer of the single film 2, wherein the connecting line of a column of the dot pattern 6 coincides with the connecting line of the second slit 5.

[0027] In one embodiment, if Figures 1 to 9 As shown, the method for making a compensating drip tape (implementation method 1) specifically includes the following steps: Blowing a single-layer wide film, dividing the single-layer wide film into two single films along the width direction, respectively serving as a second-layer single film 2 and a third-layer single film 3, printing a turbulent flow channel pattern (dot pattern 6) on the second-layer single film 2, and then cutting a second slit 5 on the second-layer single film 2; Blowing a single-layer narrow film, wherein the width of the blown single-layer narrow film is half of the width of the single-layer wide film, as the first layer of the single-layer film 1, a first slit 4 is cut on the first layer of the single-layer film 1; The wide sides of the first monolithic film 1 and the second monolithic film 2 are laminated, and the side of the second monolithic film 2 printed with the turbulent flow channel pattern faces the first monolithic film 1; The first and second monolithic films 1 and 2 after compounding are thermally compounded with the wide side of the third monolithic film 3 to form a plastic film tube belt, and the side of the second monolithic film 2 without the turbulent flow channel pattern printed thereon faces the third monolithic film 3; The plastic film tube tape can be wound into a coil and used as a compensating drip tape.

[0028] In one embodiment, if Figures 1 to 9 As shown, two film blowing machines are used to blow mold a single-layer wide film sheet and a single-layer narrow film sheet respectively. Alternatively, a single film blowing machine with double film blowing heads is used to blow mold a single-layer wide film sheet and a single-layer narrow film sheet respectively. Preferably, two film blowing machines are used, and the film blowing heads of the two film blowing machines can be parallel up and down. A single film blowing machine with double film blowing heads is used, and the two film blowing heads can be parallel up and down, so that the blown single-layer narrow film sheet and the blown single-layer wide film sheet are parallel up and down.

[0029] In one embodiment, if Figures 1 to 9 As shown, a single-layer wide film is pulled by a traction roller and cut by a slitting knife into a second layer of single-piece film 2 and a third layer of single-piece film 3. The second layer of single-piece film 2 and the third layer of single-piece film 3 are separated up and down by guide rollers, and the third layer of single-piece film 3 continues to stretch forward via the guide rail. The second layer of single-piece film 2 is pressed with a turbulent flow channel pattern (dot pattern 6) on its top surface by an embossing roller, and then the second layer of single-piece film 2 is cut with a second slit 5 by a roller-type belt slitting knife wheel.

[0030] In one embodiment, if Figures 1 to 9 As shown, the first layer of monolithic film 1 is pulled to the top of the second layer of monolithic film 2 by a traction roller, the first layer of monolithic film 1 and the second layer of monolithic film 2 are clamped by a clamping roller, and pulled to a composite film machine for compounding, and the compounded first layer of monolithic film 1 and the second layer of monolithic film 2 are pulled to the top of the third layer of monolithic film 3 by a traction roller, and the wide edges of the first layer of monolithic film 1, the second layer of monolithic film 2 and the third layer of monolithic film 3 are hot-melt-seamed or hot-melt-cut by a hot-melt knife to form a plastic film tube belt, which can be used as a compensating drip belt later.

[0031] The first layer of monolithic film 1 and the second layer of monolithic film 2 are composited for the first time, and the composite film machine used for the composite film is either a solvent-free composite machine or a solvent-containing composite machine. According to the water output of the water turbulence channel, an area of ​​the same width is reserved in the middle of the first layer of monolithic film 1 and the second layer of monolithic film 2 as a water channel on the composite roller of the composite film machine, and the parts on both sides of the water channel are used for composite. Two groups of composite rollers can be set, with a gap between the two groups, and the size of the gap is the width of the water channel, and then the composite roller is directly concave to contact the composite part on both sides of the water channel. A group of composite rollers can also be set, and then a heat insulation material such as polytetracyanethylene is set on the composite roller. The area where the composite roller is set with the heat insulation material is the width of the water channel, and the composite roller without the heat insulation material firmly composites the remaining part of the first layer of monolithic film 1 and the second layer of monolithic film 2 into one. The first layer of monolithic membrane 1, the second layer of monolithic membrane 2 and the third layer of monolithic membrane 3 are superimposed as the second composite. This composite procedure only composites the composite parts on both sides of the water channel of the three-layer membrane. The width of the water channel can be determined according to the diameter formed by water inflow, such as 16mm, 20mm and other sizes. The composite part is generally 4mm-6mm wide, and the width after cutting with a hot melt knife is 2-3mm. The width is mainly based on firmness. For example, the hot-melt knife is used to hot-melt the side seams of the hot-composite three-layer membrane cutting channel. The drip tape opens and leaks water during use, affecting the quality of use. If the hot-melt seam is firm and durable, it can also be directly hot-melt cut.

[0032] In one embodiment, if Figures 1 to 9 As shown, the hot-melted plastic film tube belt is sent to the winding machine through a traction roller and wound into a disk, and can be used as a compensating drip belt later.

[0033] In one embodiment, if Figures 1 to 9 As shown, the hot-melted plastic film tube belt is sent to the winding machine through two traction rollers. The functions of the two traction rollers are that the first traction roller tractions and positions, and the second traction roller traction causes the slit belt to fluctuate left and right. The first traction roller prevents this fluctuation from affecting the slitting and positioning. After the drip tape is slit and cut, the winding machine can form multiple strips that are positioned up and down and front and back and wind them into a coil at the same time. The coiled products are put into storage after the pressure and flow of the belt are tested and found to be qualified.

[0034] In one embodiment, if Figures 1 to 9 As shown, the method for making a compensating dripping belt (implementation method 2) comprises the following steps: Blowing a single-layer wide film, dividing the single-layer wide film into two single films along the width direction, respectively serving as a first layer of single film 1 and a second layer of single film 2, cutting a first slit 4 on the first layer of single film 1, printing a turbulent flow channel pattern (dot pattern 6) on the second layer of single film 2, and then cutting a second slit 5 on the second layer of single film 2; Blowing a single-layer narrow film, the width of the blown single-layer narrow film is half the width of the single-layer wide film, as the third layer of the single-piece film 3; The wide sides of the first monolithic film 1 and the second monolithic film 2 are laminated, and the side of the second monolithic film 2 printed with the turbulent flow channel pattern faces the first monolithic film 1; The first and second monolithic films 1 and 2 after compounding are thermally compounded with the wide side of the third monolithic film 3 to form a plastic film tube belt, and the side of the second monolithic film 2 without the turbulent flow channel pattern printed thereon faces the third monolithic film 3; Wrap the plastic film tubing into a coil.

[0035] In one embodiment, if Figures 1 to 9 As shown, the manufacturing method of the drip tape in the first and second embodiments is scientific and advanced, and can realize multiple molding at one time, such as realizing the molding of ten drip tapes at one time. The film width is 600mm, the production machine is small and high-speed, and the power consumption is low. The speed can reach 300 meters per minute. Ten drip tapes can produce 3000 meters in one minute, which is several times the efficiency of existing equipment. There is no need for injection molding turbulent patches, and no complex molds are needed to reduce equipment investment. In addition, a wide range of materials are selected, and the drip tape is not easy to be blocked. In particular, HDPE material is used to resist tearing and water pressure. The weight per meter of the material is 50% of that of the current conventional drip irrigation tape. HDPE blow molding recycled material can also be used. Several materials can be composited. According to the unique functions of this product, it can be used for surface drip irrigation and underground applications. If it is thicker, it can be used repeatedly all year round.

[0036] In one embodiment, if Figures 1 to 9 As shown, the method for making a compensating drip tape (manufacturing method implementation method three) specifically includes the following steps: Blown single-layer film, the single-layer film is wound into a roll along the length direction, and cut into three single films with the same width, which are respectively used as the first single film 1, the second single film 2 and the third single film 3. The first single film 1 is cut with a first slit 4, and the second single film 2 is printed with a turbulent flow channel pattern (dot pattern 6), and then the second single film 2 is cut with a second slit 5, and the wide edges of the first single film 1, the second single film 2 and the third single film 3 are thermally composited, and then hot-melt slitting or knife slitting is performed after thermal composite to obtain a plastic film tube belt, which is wound into a disk and can be used as a compensating drip tape in the later stage. In addition, the cast film forming process can also realize the production of compensating drip tape.

[0037] In one embodiment, if Figures 1 to 9 As shown, the method for making a compensating drip tape (manufacturing method implementation method 4) specifically includes the following steps: A blown single-layer film is divided into three areas in sequence along the width direction, which are respectively used as the second single-layer film 2, the first single-layer film 1 and the third single-layer film 3. A first slit 4 is cut on the first single-layer film 1, and a turbulent flow channel pattern (dot pattern 6) is printed on the second single-layer film 2. Then, a second slit 5 is cut on the second single-layer film 2. The blown single-layer film is folded along the dividing line between the second single-layer film 2 and the first single-layer film 1, and the edges of the second single-layer film 2 and the first single-layer film 1 are thermally composited. The blown single-layer film is folded along the dividing line between the first single-layer film 1 and the third single-layer film 3, and the edges of the third single-layer film 3 and the second single-layer film 2 are thermally composited to obtain a plastic film tube belt. The plastic film tube belt is wound into a disc and can be used as a compensating drip belt in the later stage.

[0038] In one embodiment, if Figures 1 to 9 As shown, the blown single-layer film, the blown single-layer wide film and the blown single-layer narrow film can all be formed by blow molding of one material or by blow molding of a plurality of composite materials.

[0039] In one embodiment, if Figures 1 to 9 As shown, the invention of this production method and the invention of the production line equipment can be a typical high-quality productivity, saving a lot of resources, materials, electricity, water, and artificial green carbon reduction. At present, there is no production method for agricultural drip tape on the market. This method is efficient, reliable in quality, and can realize intelligent production. Through preliminary tests, the development concept of wide, thin and long drip tape can be fully realized. The tape has a large water flow rate, thinness can achieve wide tape without increasing weight, and length can achieve a long laying length of the tape, reducing the laying of the main pipeline. This product structure has water pressure compensation, and the water flow rate is uniform and stable.

[0040] 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 method for making a compensating drip tape, characterized in that: The following steps are involved: A compensating drip tape is manufactured, wherein the compensating drip tape is a plastic film tube tape, wherein the plastic film tube tape comprises a first layer of monolithic film, a second layer of monolithic film and a third layer of monolithic film, wherein the second layer of monolithic film is sandwiched between the first layer of monolithic film and the second layer of monolithic film, wherein first slits are cut at intervals along the length direction of the first layer of monolithic film, wherein the first slits are located at half of the width direction of the first layer of monolithic film, wherein second slits are cut at intervals along the length direction of the second layer of monolithic film, wherein the second slits are located at half of the width direction of the second layer of monolithic film, wherein the first slits are located at half of the width direction of the second layer of monolithic film, wherein the first slits are located at half of the distance between two adjacent second slits in their spacing arrangement direction, and wherein a turbulent flow channel pattern is printed on a surface of the second layer of monolithic film facing the first layer of monolithic film.

2. A method for making a compensating drip tape according to claim 1, characterized in that: The turbulent flow channel pattern is a dot pattern arranged in a matrix, the row and column directions of the dot pattern are respectively parallel to the width direction and the length direction of the second layer of the single film, and the connecting line of one column of the dot pattern coincides with the connecting line of the second slits.

3. A method for making a compensating drip tape according to claim 1 or 2, characterized in that: The following steps are involved: Blowing a single-layer wide film, dividing the single-layer wide film into two single films along the width direction, respectively serving as the second-layer single film and the third-layer single film, printing a turbulent flow channel pattern on the second-layer single film, and then cutting the second-layer single film with the second slit; Blowing a single-layer narrow film sheet, wherein the width of the blown single-layer narrow film sheet is half of the width of the single-layer wide film sheet, and the first layer of the single-layer film sheet is used as the first layer of the single-layer film, and the first slit is cut on the first layer of the single-layer film; Compounding the wide sides of the first monolithic film and the second monolithic film, with the side of the second monolithic film printed with the turbulent flow channel pattern facing the first monolithic film; The first layer of monolithic film and the second layer of monolithic film after compounding are thermally compounded with the wide side of the third layer of monolithic film to form a plastic film tube belt, wherein the side of the second layer of monolithic film without the turbulent flow channel pattern printed thereon faces the third layer of monolithic film; The plastic film tube tape is wound into a coil.

4. A method for making a compensating drip tape according to claim 3, characterized in that: Two film blowing machines are used to blow the single-layer wide film sheet and the single-layer narrow film sheet respectively, or a single film blowing machine with double film blowing heads is used to blow the single-layer wide film sheet and the single-layer narrow film sheet respectively.

5. A method for making a compensating drip tape according to claim 4, characterized in that: The single-layer wide film is pulled by a traction roller and cut by a slitting knife to be evenly divided into a second layer of single-piece film and a third layer of single-piece film. The second layer of single-piece film and the third layer of single-piece film are separated up and down by guide rollers, and the third layer of single-piece film continues to move forward via the guide rail. The second layer of single-piece film is pressed with a turbulent flow channel pattern on its top surface by an embossing roller, and then the second layer of single-piece film is cut by a roller-type slitting knife wheel for a second slit.

6. A method for making a compensating drip tape according to claim 5, characterized in that: The first layer of monolithic film is pulled to the top of the second layer of monolithic film by a pulling roller, the first layer of monolithic film and the second layer of monolithic film are pulled to a composite film machine by a pinch roller for composite, the composited first layer of monolithic film and the second layer of monolithic film are pulled to the top of the third layer of monolithic film by a pulling roller, the wide edges of the first layer of monolithic film, the second layer of monolithic film and the third layer of monolithic film are hot-melt-seamed or hot-melt-slit by a hot-melt knife to form a plastic film tube belt.

7. A method for making a compensating drip tape according to claim 6, characterized in that: The hot-melted plastic film tube is sent to the winding machine through two traction rollers and wound into a disk.

8. A method for making a compensating drip tape according to claim 1 or 2, characterized in that: The following steps are involved: Blowing a single-layer wide film, dividing the single-layer wide film into two single films along the width direction, respectively serving as the first layer of single film and the second layer of single film, cutting the first slit on the first layer of single film, printing a turbulent flow channel pattern on the second layer of single film, and then cutting the second slit on the second layer of single film; Blowing a single-layer narrow film, wherein the width of the blown single-layer narrow film is half the width of the single-layer wide film, as the third layer of single-piece film; Compounding the wide sides of the first monolithic film and the second monolithic film, with the side of the second monolithic film printed with the turbulent flow channel pattern facing the first monolithic film; The first layer of monolithic film and the second layer of monolithic film after compounding are thermally compounded with the wide side of the third layer of monolithic film to form a plastic film tube belt, wherein the side of the second layer of monolithic film without the turbulent flow channel pattern printed thereon faces the third layer of monolithic film; The plastic film tube tape is wound into a coil.

9. A method for making a compensating drip tape according to claim 1 or 2, characterized in that: The following steps are involved: A single-layer film is blown, and the single-layer film is wound into a roll along the length direction, and is cut into three single-layer films with the same width, respectively serving as a first layer of single-layer film, a second layer of single-layer film, and a third layer of single-layer film, the first layer of single-layer film is cut with the first slit, the second layer of single-layer film is printed with a turbulent flow channel pattern, and then the second layer of single-layer film is cut with the second slit, the wide edges of the first layer of single-layer film, the second layer of single-layer film, and the third layer of single-layer film are thermally laminated, and after thermal lamination, hot-melt slitting or knife cutting is performed to obtain the plastic film tube strip, and the plastic film tube strip is wound into a disk.

10. A method for making a compensating drip tape according to claim 1 or 2, characterized in that: The following steps are involved: A blown single-layer film is divided into three areas in sequence along the width direction, which are respectively used as a second layer of single-layer film, a first layer of single-layer film and a third layer of single-layer film, the first layer of single-layer film is cut on the first layer of single-layer film, a turbulent flow channel pattern is printed on the second layer of single-layer film, and then the second layer of single-layer film is cut with the second slit, the blown single-layer film is folded along the dividing line between the second layer of single-layer film and the first layer of single-layer film, the edges of the second layer of single-layer film and the first layer of single-layer film are thermally composited, the blown single-layer film is folded along the dividing line between the first layer of single-layer film and the third layer of single-layer film, the edges of the third layer of single-layer film and the second layer of single-layer film are thermally composited, and the plastic film tube is obtained, and the plastic film tube is wound into a disk.

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