A kind of woven cloth specially used for logistics and its manufacturing method

Abstract

This invention relates to the field of specialized woven fabrics for logistics, specifically a woven fabric for logistics and its production method. The product, called a polyethylene plastic composite woven fabric (HP), is composed of LDPE / HDPE / LDPE, also known as PE fabric. It features softness, high strength and tear resistance, and is lightweight, weighing one-third less than traditional canvas of the same surface area. It is also corrosion-resistant, mildew-resistant, and weather-resistant, with an operating temperature range of 20 to 80°C and reusable.

Description

Technical Field

[0001] The present invention relates to the field of special woven fabrics for logistics, in particular to a special woven fabric for logistics and a manufacturing method thereof. Background Art

[0002] With the development of e-commerce and express delivery, people have become accustomed to shopping on online platforms, and the use of logistics-specific woven fabrics has become increasingly frequent and important. However, existing logistics-specific woven fabrics have shortcomings such as poor mechanical properties and easy rupture, which makes goods vulnerable to damage during long-distance transportation. Summary of the Invention

[0003] The purpose of the present invention is to solve the problem of poor mechanical properties of existing logistics-specific woven fabrics.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A method for producing a special woven cloth for logistics comprises the following steps: melt-extruding raw materials, stretching them under precise temperature control to always maintain a high crystallization temperature control point to form special woven fibers for logistics, and then weaving the special woven fibers for logistics to form the special woven cloth for logistics.

[0006] Preferably, the logistics-specific woven fiber is formed by stretching at 8.5 times the speed while maintaining the high crystallization temperature control point at precise temperature control.

[0007] Preferably, the high crystallization temperature control point is determined according to the actual operating line speed and satisfies the following relationship:

[0008] T=128℃+0.5℃×(v-200m / min) / 10±δ;

[0009] Wherein, T is the high crystallization temperature control point, in °C; v is the actual operating line speed, in m / min; δ is the temperature control error, in °C.

[0010] Preferably, the actual operating line speed is 180-250 m / min.

[0011] Preferably, the temperature control error is 0.2°C.

[0012] Preferably, the method comprises the following steps:

[0013] A. Wire drawing: Flat yarn is produced through a flat film extrusion wire drawing machine. The production process includes: HDPE raw material 1 → extrusion → cooling film formation → filament cutting → stretching → shaping → winding to obtain the logistics-specific woven fiber. The HDPE raw material includes 95% HDPE500OS and 5% Z-25 masterbatch. The following four production links are precisely controlled:

[0014] A1. The cooling water for melt film molding is kept at 36-38℃. The purpose is to prevent the plastic from crystallizing before stretching. Otherwise, too high a water temperature will cause crystallization and affect its tensile strength, while too low a water temperature will affect production operations.

[0015] A2. The temperature of the stretching drying plate is set at the actual operating line speed, which can make the plastic produce the crystallization point state. The accuracy is controlled within ±0.2℃ to obtain high-strength products. If the temperature is too low or too high, high-quality products cannot be obtained.

[0016] A3. Based on the precise temperature control of the stretching drying plate, the product is stretched at 8.5 times the speed, so that the plastic molecules are oriented and then cooled to shape. The molecules do not have time to release the orientation, and the product has stable high strength and high toughness.

[0017] A4. The cooling circulating water temperature is controlled within the range of 15-18°C. If the temperature is too high, the plastic molecules will lose their orientation; the product will have no tensile strength and low toughness, thus obtaining the logistics-specific woven fiber.

[0018] B. Warping: The wire is wound and coiled through the warping machine. The production process includes: chain rack distribution of the required number of wires → wire guide device → winding and rewinding. The following production links are precisely controlled:

[0019] B1. The pressure is controlled between 0.3 and 0.4 MPa so that each warp yarn has appropriate air pressure to control its tension, ensuring the flatness of the base fabric surface in the next process. Too low air pressure will lead to uneven tension of the base fabric and wrinkles of the base fabric.

[0020] C. Water loom: The base fabric is produced by a water loom. The production process includes: winding → arranging → feeding → warp undulation → weft insertion → winding. The base fabric is weaved using the logistics-specific weaving fiber. The following production links are precisely controlled:

[0021] C1. The current of the 1200W turbine reducer of the warp let-off device is controlled between 50 and 80A to control the warp let-off tension. It cannot be too high or too low. Otherwise, if it is too high, the flatness of the base fabric will be affected. If it is too low, the warp and weft of the fabric will be loose and not compact.

[0022] D. Lamination: PE cloth is produced through an extrusion laminating machine. The production process includes: HDPE raw material 2 → extrusion → base fabric → lamination → winding. On the basis of the base fabric, double-sided lamination is performed to form an LDPE / HDPE / LDPE structure to obtain the logistics-specific woven cloth. The LDPE raw material includes LDPE801YY 60%, LLDPE2320# 34%, and masterbatch 6%. The following three production links are precisely controlled:

[0023] D1. The extrusion temperature is combined with the base fabric speed to set the optimal temperature. The temperature control range is ±1°C. A high temperature will destroy the tensile strength of the base fabric, while a low temperature will affect the bonding strength.

[0024] D2. The base fabric preheating temperature is combined with the base fabric wiring speed to set the temperature, which can dry the fabric surface and preheat the base fabric. The temperature control range is ±1°C. Too high a temperature will damage the tensile strength and width of the product, while too low a temperature will affect the adhesion of the composite film.

[0025] D3. The pressure should always be maintained at 0.6MPa~0.65MPa during compounding. A lower pressure will affect the compounding fastness of the product.

[0026] Preferably, in step D1, the base fabric wiring speed is 60 m / min; and in step D2, the base fabric preheating temperature is 210°C.

[0027] A special woven fabric for logistics obtained by the manufacturing method of the special woven fabric for logistics as described above.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] The logistics-specific woven fabric obtained by this invention features high strength, high toughness, and fracture resistance, with a consistently high strength exceeding 1230N. It remains resistant to handling and pulling during use. Advanced production processes are employed to produce high-strength flat yarns. These yarns are extruded and cooled, then stretched 8.5 times under precise temperature control to maintain a high crystallization temperature, achieving full molecular orientation. The fabric is then quenched to achieve a final shape. The PE fabric is constructed from over 54 high-strength flat yarns per square decimeter, woven using a water-woven undulating process to create the base fabric. The fabric is then extruded and laminated using a laminating machine to create the logistics-specific woven fabric.

[0030] This product is a polyethylene plastic composite woven fabric (HP), composed of LDPE / HDPE / LDPE, also known as PE fabric. It features softness, high strength, tear resistance, and light weight—one-third lighter than traditional canvas of the same surface area. It is also corrosion-resistant, mildew-resistant, and weather-resistant. It operates within a temperature range of 20 to 80°C and is reusable. DETAILED DESCRIPTION

[0031] The present invention will be described in further detail below with reference to the examples, but the embodiments of the present invention are not limited thereto.

[0032] Example 1

[0033] A method for producing a special woven cloth for logistics, comprising the following steps:

[0034] 1. Wire drawing: Equipment name: Flat film extrusion wire drawing machine, flat wire: Production process: HDPE raw material → extrusion → cooling film → slitting → stretching → shaping → winding, to obtain logistics-specific woven fiber. Raw material formula ratio, HDPE500OS95%, Z-25 masterbatch 5%: The four links of the production process must be precisely controlled.

[0035] 1. The cooling water temperature of melt film molding is kept in the range of 36-38℃. The purpose is to prevent the plastic from crystallizing before stretching. Otherwise, if the water temperature is too high, crystallization will occur and affect its tensile strength, while if it is too low, it will affect production operations.

[0036] 2. The temperature of the stretching drying plate is set at the actual operating line speed, which can make the plastic produce a crystallization point state. The accuracy is controlled within ±0.2°C to obtain high-strength products. If the temperature is too low or too high, high-quality products cannot be obtained. The actual operating line speed of this embodiment is 200m / min.

[0037] 3. Based on the precise temperature control of the stretching drying plate at 128℃, the product is stretched at 8.5 times the speed to allow the plastic molecules to be oriented and then shaped through → cooling. The molecules do not have time to release the orientation, and the product has stable high strength and high toughness.

[0038] 4. The cooling circulating water temperature should be controlled within the range of 15-18℃. If the temperature is too high, the plastic molecules will lose their orientation. The product will have no tensile strength and low toughness.

[0039] 1. Warping: Equipment Name: Warping Machine, Wire Coiling: The production process involves distributing the required number of wires on a chain frame, passing the wires through a wire guide, and then winding them. Precisely controlled pressure, between 0.3 and 0.4 MPa, ensures that each warp yarn has the appropriate air pressure to control tension, ensuring the smoothness of the base fabric in the subsequent process. Insufficient air pressure will result in uneven tension on the base fabric, causing wrinkles.

[0040] II. Waterloom: Equipment Name: Waterloom, Base Fabric: Production Process: Wire Coiling → Wire Arranging and Feeding → Warp Threading → Weft Insertion → Winding. Weaving is performed using specialized logistics-grade woven fibers to produce the base fabric. The key control link is the warp let-off device. The current of the 1200W turbine reducer is controlled between 50 and 80A to control the warp let-off tension. It should not be too high or too low, otherwise it will affect the flatness of the base fabric. If it is too high, the warp and weft will be loose and uncompacted.

[0041] 3. Lamination: Equipment Name: Extrusion Laminating Machine, PE Cloth: Production Process: LDPE raw material → extrusion → base fabric → lamination → winding. The base fabric is laminated on both sides to form an LDPE / HDPE / LDPE structure, resulting in a woven fabric specifically for logistics. The raw material formula is 60% LDPE801YY, 34% LLDPE2320#, and 6% masterbatch. Three steps in the production process require precise control:

[0042] 1. The extrusion temperature is set to the optimal temperature in combination with the base fabric speed. The temperature control range is ±1°C. A higher temperature will damage the tensile strength of the base fabric, while a lower temperature will affect the bonding strength. In this embodiment, the base fabric speed is 60m / min and the base fabric preheating temperature is 210°C.

[0043] 2. The pressure should always be maintained at 0.63MPa during lamination. A lower pressure will affect the lamination strength of the product.

[0044] 3. The base fabric preheating temperature is combined with the base fabric wiring speed to set the temperature, which can dry the fabric surface and preheat the base fabric. The temperature control range is ±1°C. Too high a temperature will damage the tensile strength and width of the product, while too low a temperature will affect the adhesion of the composite film.

[0045] Example 2

[0046] A method for producing a special woven cloth for logistics, comprising the following steps:

[0047] 1. Wire drawing: Equipment name: Flat film extrusion wire drawing machine, flat wire: Production process: HDPE raw material → extrusion → cooling film → slitting → stretching → shaping → winding, to obtain logistics-specific woven fiber. Raw material formula ratio, HDPE500OS95%, Z-25 masterbatch 5%: The four links of the production process must be precisely controlled.

[0048] 1. The cooling water temperature of melt film molding is kept in the range of 36-38℃. The purpose is to prevent the plastic from crystallizing before stretching. Otherwise, if the water temperature is too high, crystallization will occur and affect its tensile strength, while if it is too low, it will affect production operations.

[0049] 2. The temperature of the stretching drying plate is set at the actual operating line speed, which can make the plastic produce a crystallization point state. The accuracy is controlled within ±0.2°C to obtain high-strength products. If the temperature is too low or too high, high-quality products cannot be obtained. The actual operating line speed of this embodiment is 180m / min.

[0050] 3. Based on the precise temperature control of the stretching drying plate at 127℃, the product is stretched at 8.5 times the speed to allow the plastic molecules to be oriented and then shaped through → cooling. The molecules do not have time to release the orientation, and the product has stable high strength and high toughness.

[0051] 4. The cooling circulating water temperature should be controlled within the range of 15-18℃. If the temperature is too high, the plastic molecules will lose their orientation. The product will have no tensile strength and low toughness.

[0052] 1. Warping: Equipment Name: Warping Machine, Wire Coiling: The production process involves distributing the required number of wires on a chain frame, passing the wires through a wire guide, and then winding them. Precisely controlled pressure, between 0.3 and 0.4 MPa, ensures that each warp yarn has the appropriate air pressure to control tension, ensuring the smoothness of the base fabric in the subsequent process. Insufficient air pressure will result in uneven tension on the base fabric, causing wrinkles.

[0053] II. Waterloom: Equipment Name: Waterloom, Base Fabric: Production Process: Wire Coiling → Wire Arranging → Wire Feeding → Warp Flowing → Weft Insertion → Winding. Weaving is performed using specialized logistics-grade woven fibers to produce the base fabric. The key control link is the warp let-off mechanism. The current of the 1200W turbine reducer is controlled between 50 and 80A to control the warp let-off tension. It should not be too high or too low, otherwise the base fabric will be smooth, while too low will result in loose warp and weft.

[0054] 3. Lamination: Equipment Name: Extrusion Laminating Machine, PE Cloth: Production Process: LDPE raw material → extrusion → base fabric → lamination → winding. The base fabric is laminated on both sides to form an LDPE / HDPE / LDPE structure, resulting in a woven fabric specifically for logistics. The raw material formula is 60% LDPE801YY, 34% LLDPE2320#, and 6% masterbatch. Three steps in the production process require precise control:

[0055] 1. The extrusion temperature is set to the optimal temperature in combination with the base fabric speed. The temperature control range is ±1°C. A higher temperature will damage the tensile strength of the base fabric, while a lower temperature will affect the bonding strength. In this embodiment, the base fabric speed is 60m / min and the base fabric preheating temperature is 210°C.

[0056] 2. The pressure should always be maintained at 0.6MPa during lamination. A lower pressure will affect the lamination strength of the product.

[0057] 3. The preheating temperature of the base fabric combined with the base fabric wiring speed can both dry the fabric surface and preheat the base fabric. The temperature control range is ±1°C. Too high a temperature will damage the tensile strength and width of the product. Too low a temperature will affect the adhesion of the composite film.

[0058] Example 3

[0059] A method for producing a special woven cloth for logistics, comprising the following steps:

[0060] 1. Wire Drawing: Equipment Name: Flat Film Extrusion Wire Drawing Machine, Flat Wire: Production Process: HDPE raw material → extrusion → cooling film formation → slitting → stretching → shaping → winding, to obtain logistics-specific woven fiber. Raw material formula ratio: HDPE 500OS 95%, Z-25 masterbatch 5%: Four links in the production process must be precisely controlled:

[0061] 1. The cooling water temperature of melt film molding is kept in the range of 36-38℃. The purpose is to prevent the plastic from crystallizing before stretching. Otherwise, if the water temperature is too high, crystallization will occur and affect its tensile strength, while if it is too low, it will affect production operations.

[0062] 2. The temperature of the stretching drying plate is set at the actual operating line speed, which can make the plastic produce a crystallization point state. The accuracy is controlled within ±0.2°C to obtain high-strength products. If the temperature is too low or too high, high-quality products cannot be obtained. The actual operating line speed of this embodiment is 250m / min.

[0063] 3. Based on the precise temperature control of the stretching drying plate at 130.5℃, the product is stretched at 8.5 times the speed to allow the plastic molecules to be oriented and then shaped through → cooling. The molecules do not have time to release the orientation, and the product has stable high strength and high toughness.

[0064] 4. The cooling circulating water temperature should be controlled within the range of 15-18℃. If the temperature is too high, the plastic molecules will lose their orientation. The product will have no tensile strength and low toughness.

[0065] 1. Warping: Equipment Name: Warping Machine, Wire Coiling: The production process involves distributing the required number of wires on a chain frame, passing the wires through a wire guide, and then winding them. Precisely controlled pressure, between 0.3 and 0.4 MPa, ensures that each warp yarn has the appropriate air pressure to control tension, ensuring the smoothness of the base fabric in the subsequent process. Insufficient air pressure will result in uneven tension on the base fabric, causing wrinkles.

[0066] II. Waterloom: Equipment Name: Waterloom, Base Fabric: Production Process: Wire Coiling → Wire Arranging → Wire Feeding → Warp Flowing → Weft Insertion → Winding. Weaving is performed using specialized logistics-grade woven fibers to produce the base fabric. The key control link is the warp let-off mechanism. The current of the 1200W turbine reducer is controlled between 50 and 80A to control the warp let-off tension. It should not be too high or too low, otherwise the base fabric will be smooth, while too low will result in loose warp and weft.

[0067] 3. Lamination: Equipment Name: Extrusion Laminating Machine, PE Cloth: Production Process: LDPE raw material → extrusion → base fabric → lamination → winding. The base fabric is laminated on both sides to form an LDPE / HDPE / LDPE structure, resulting in a woven fabric specifically for logistics. The raw material formula is 60% LDPE801YY, 34% LLDPE2320#, and 6% masterbatch. Three steps in the production process require precise control:

[0068] 1. The extrusion temperature is set to the optimal temperature in combination with the base fabric speed. The temperature control range is ±1°C. A higher temperature will damage the tensile strength of the base fabric, while a lower temperature will affect the bonding strength. In this embodiment, the base fabric speed is 60m / min and the base fabric preheating temperature is 210°C.

[0069] 2. The pressure should always be maintained at 0.65MPa during lamination. A lower pressure will affect the lamination strength of the product.

[0070] 3. The base fabric preheating temperature is combined with the base fabric wiring speed to set the temperature, which can dry the fabric surface and preheat the base fabric. The temperature control range is ±1°C. Too high a temperature will damage the tensile strength and width of the product, while too low a temperature will affect the adhesion of the composite film.

[0071] Comparative Example 1

[0072] A method for producing a special woven cloth for logistics, comprising the following steps:

[0073] 1. Wire Drawing: Equipment Name: Flat Film Extrusion Wire Drawing Machine, Flat Wire: Production Process: HDPE raw material → extrusion → cooling film formation → slitting → stretching → shaping → winding, to obtain logistics-specific woven fiber. Raw material formula ratio: HDPE 500OS 95%, Z-25 masterbatch 5%: Four links in the production process must be precisely controlled:

[0074] 1. The cooling water temperature of melt film molding is kept in the range of 36-38℃. The purpose is to prevent the plastic from crystallizing before stretching. Otherwise, if the water temperature is too high, crystallization will occur and affect its tensile strength, while if it is too low, it will affect production operations.

[0075] 2. The temperature of the stretching drying plate is set at the actual operating line speed, which can make the plastic produce a crystallization point state. The accuracy is controlled within ±0.2°C to obtain high-strength products. If the temperature is too low or too high, high-quality products cannot be obtained. The actual operating line speed of this embodiment is 200m / min.

[0076] 3. Based on the precise temperature control of the stretching drying plate at 127℃, the product is stretched at 8.5 times the speed to allow the plastic molecules to be oriented and then shaped through → cooling. The molecules do not have time to release the orientation, and the product has stable high strength and high toughness.

[0077] 4. The cooling circulating water temperature should be controlled within the range of 15-18℃. If the temperature is too high, the plastic molecules will lose their orientation. The product will have no tensile strength and low toughness.

[0078] 1. Warping: Equipment Name: Warping Machine, Wire Coiling: The production process involves distributing the required number of wires on a chain frame, passing the wires through a wire guide, and then winding them. Precisely controlled pressure, between 0.3 and 0.4 MPa, ensures that each warp yarn has the appropriate air pressure to control tension, ensuring the smoothness of the base fabric in the subsequent process. Insufficient air pressure will result in uneven tension on the base fabric, causing wrinkles.

[0079] II. Waterloom: Equipment Name: Waterloom, Base Fabric: Production Process: Wire Coiling → Wire Arranging → Wire Feeding → Warp Flowing → Weft Insertion → Winding. Weaving is performed using specialized logistics-grade woven fibers to produce the base fabric. The key control link is the warp let-off mechanism. The current of the 1200W turbine reducer is controlled between 50 and 80A to control the warp let-off tension. It should not be too high or too low, otherwise the base fabric will be smooth, while too low will result in loose warp and weft.

[0080] 3. Laminating: Equipment name: Extrusion laminating machine, PE cloth: Production process: LDPE raw material → extrusion → base fabric → laminating → winding. On the basis of the base fabric, double-sided lamination is performed to form an LDPE / HDPE / LDPE structure to obtain a logistics-specific woven cloth. The raw material formula ratio is LDPE801YY 60%, LLDPE2320# 34%, masterbatch 6%. The three links of the production process require precise control.

[0081] 1. The extrusion temperature is set to the optimal temperature in combination with the base fabric speed. The temperature control range is ±1°C. A higher temperature will damage the tensile strength of the base fabric, while a lower temperature will affect the bonding strength. In this embodiment, the base fabric speed is 60m / min and the base fabric preheating temperature is 210°C.

[0082] 2. The pressure should always be maintained at 0.63MPa during lamination. A lower pressure will affect the lamination strength of the product.

[0083] 3. The base fabric preheating temperature is combined with the base fabric wiring speed to set the temperature, which can dry the fabric surface and preheat the base fabric. The temperature control range is ±1°C. Too high a temperature will damage the tensile strength and width of the product, while too low a temperature will affect the adhesion of the composite film.

[0084] Comparative Example 2

[0085] A method for producing a special woven cloth for logistics, comprising the following steps:

[0086] 1. Wire Drawing: Equipment Name: Flat Film Extrusion Wire Drawing Machine, Flat Wire: Production Process: HDP raw material → extrusion → cooling film formation → slitting → stretching → shaping → winding, to obtain logistics-specific woven fiber. Raw material formula ratio: HDPE 500OS 95%, Z-25 masterbatch 5%: Four links in the production process must be precisely controlled:

[0087] 1. The cooling water temperature of melt film molding is kept in the range of 36-38℃. The purpose is to prevent the plastic from crystallizing before stretching. Otherwise, if the water temperature is too high, crystallization will occur and affect its tensile strength, while if it is too low, it will affect production operations.

[0088] 2. The temperature of the stretching drying plate is set at the actual operating line speed, which can make the plastic produce a crystallization point state. The accuracy is controlled within ±0.2°C to obtain high-strength products. If the temperature is too low or too high, high-quality products cannot be obtained. The actual operating line speed of this embodiment is 200m / min.

[0089] 3. Based on the precise temperature control of the stretching drying plate at 129°C, the product is stretched at 8.5 times the speed to allow the plastic molecules to be oriented and then cooled to set. The molecules do not have time to release the orientation, and the product has stable high strength and high toughness.

[0090] 4. The cooling circulating water temperature should be controlled within the range of 15-18℃. If the temperature is too high, the plastic molecules will lose their orientation. The product will have no tensile strength and low toughness.

[0091] 1. Warping: Equipment Name: Warping Machine, Wire Coiling: The production process involves distributing the required number of wires on a chain frame, passing the wires through a wire guide, and then winding them. Precisely controlled pressure, between 0.3 and 0.4 MPa, ensures that each warp yarn has the appropriate air pressure to control tension, ensuring the smoothness of the base fabric in the subsequent process. Insufficient air pressure will result in uneven tension on the base fabric, causing wrinkles.

[0092] II. Waterloom: Equipment Name: Waterloom, Base Fabric: Production Process: Wire Coiling → Wire Arranging → Wire Feeding → Warp Flowing → Weft Insertion → Winding. Weaving is performed using specialized logistics-grade woven fibers to produce the base fabric. The key control link is the warp let-off mechanism. The current of the 1200W turbine reducer is controlled between 50 and 80A to control the warp let-off tension. It should not be too high or too low, otherwise the base fabric will be smooth, while too low will result in loose warp and weft.

[0093] 3. Lamination: Equipment Name: Extrusion Laminating Machine, PE Cloth: Production Process: LDPE raw material → extrusion → base fabric → lamination → winding. The base fabric is laminated on both sides to form an LDPE / HDPE / LDPE structure, resulting in a woven fabric specifically for logistics. The raw material formula is 60% LDPE801YY, 34% LLDPE2320#, and 6% masterbatch. Three steps in the production process require precise control:

[0094] 1. The extrusion temperature is set to the optimal temperature in combination with the base fabric speed. The temperature control range is ±1°C. A higher temperature will damage the tensile strength of the base fabric, while a lower temperature will affect the bonding strength. In this embodiment, the base fabric speed is 60m / min and the base fabric preheating temperature is 210°C.

[0095] 2. The pressure should always be maintained at 0.63MPa during lamination. A lower pressure will affect the lamination strength of the product.

[0096] 3. The base fabric preheating temperature is combined with the base fabric wiring speed to set the temperature, which can dry the fabric surface and preheat the base fabric. The temperature control range is ±1°C. Too high a temperature will damage the tensile strength and width of the product, while too low a temperature will affect the adhesion of the composite film.

[0097] Comparative Example 3

[0098] A method for producing a special woven cloth for logistics, comprising the following steps:

[0099] 1. Wire Drawing: Equipment Name: Flat Film Extrusion Wire Drawing Machine, Flat Wire: Production Process: HDPE raw material → extrusion → cooling film formation → slitting → stretching → shaping → winding, to obtain logistics-specific woven fiber. Raw material formula ratio: HDPE 500OS 95%, Z-25 masterbatch 5%: Four links in the production process must be precisely controlled:

[0100] 1. The cooling water temperature of melt film molding is kept in the range of 36-38℃. The purpose is to prevent the plastic from crystallizing before stretching. Otherwise, if the water temperature is too high, crystallization will occur and affect its tensile strength, while if it is too low, it will affect production operations.

[0101] 2. The temperature of the stretching drying plate is set at the actual operating line speed, which can make the plastic produce a crystallization point state. The accuracy is controlled within ±0.2°C to obtain high-strength products. If the temperature is too low or too high, high-quality products cannot be obtained. The line speed of this embodiment is 200m / min.

[0102] 3. Based on the precise temperature control of the stretching drying plate at 128℃, the product is stretched at 8.5 times the speed to allow the plastic molecules to be oriented and then shaped through → cooling. The molecules do not have time to release the orientation, and the product has stable high strength and high toughness.

[0103] 4. The temperature of cooling circulating water is controlled at room temperature.

[0104] 1. Warping: Equipment Name: Warping Machine, Wire Coiling: The production process involves distributing the required number of wires on a chain frame, passing the wires through a wire guide, and then winding them. Precisely controlled pressure, between 0.3 and 0.4 MPa, ensures that each warp yarn has the appropriate air pressure to control tension, ensuring the smoothness of the base fabric in the subsequent process. Insufficient air pressure will result in uneven tension on the base fabric, causing wrinkles.

[0105] II. Waterloom: Equipment Name: Waterloom, Base Fabric: Production Process: Wire Coiling → Wire Arranging → Wire Feeding → Warp Flowing → Weft Insertion → Winding. Weaving is performed using specialized logistics-grade woven fibers to produce the base fabric. The key control link is the warp let-off mechanism. The current of the 1200W turbine reducer is controlled between 50 and 80A to control the warp let-off tension. It should not be too high or too low, otherwise the base fabric will be smooth, while too low will result in loose warp and weft.

[0106] 3. Lamination: Equipment Name: Extrusion Laminating Machine, PE Cloth: Production Process: LDPE raw material → extrusion → base fabric → lamination → winding. The base fabric is laminated on both sides to form an LDPE / HDPE / LDPE structure, resulting in a woven fabric specifically for logistics. The raw material formula is 60% LDPE801YY, 34% LLDPE2320#, and 6% masterbatch. Three steps in the production process require precise control:

[0107] 1. The extrusion temperature is set to the optimal temperature in combination with the base fabric speed. The temperature control range is ±1°C. A higher temperature will damage the tensile strength of the base fabric, while a lower temperature will affect the bonding strength. In this embodiment, the base fabric speed is 60m / min and the base fabric preheating temperature is 210°C.

[0108] 2. The pressure should always be maintained at 0.63MPa during lamination. A lower pressure will affect the lamination strength of the product.

[0109] 3. The base fabric preheating temperature is combined with the base fabric wiring speed to set the temperature, which can dry the fabric surface and preheat the base fabric. The temperature control range is ±1°C. Too high a temperature will damage the tensile strength and width of the product, while too low a temperature will affect the adhesion of the composite film.

[0110] Comparative Example 4

[0111] A method for producing a special woven cloth for logistics, comprising the following steps:

[0112] 1. Wire drawing: Equipment name: Flat film extrusion wire drawing machine, flat wire: Production process: HDPE raw material → extrusion → cooling film → slitting → stretching → shaping → winding, to obtain logistics-specific woven fiber. Raw material formula ratio, HDPE500OS95%, Z-25 masterbatch 5%: The four links of the production process must be precisely controlled.

[0113] 1. The cooling water temperature of melt film molding is kept in the range of 36-38℃. The purpose is to prevent the plastic from crystallizing before stretching. Otherwise, if the water temperature is too high, crystallization will occur and affect its tensile strength, while if it is too low, it will affect production operations.

[0114] 2. The temperature of the stretching drying plate is set at the actual operating line speed, which can make the plastic produce a crystallization point state. The accuracy is controlled within ±0.2°C to obtain high-strength products. If the temperature is too low or too high, high-quality products cannot be obtained. The actual operating line speed of this embodiment is 200m / min.

[0115] 3. Based on the precise temperature control of the stretching drying plate at 128℃, the product is stretched at 8 times the speed to allow the plastic molecules to be oriented and then cooled to set. The molecules do not have time to release the orientation, and the product has stable high strength and high toughness.

[0116] 4. The cooling circulating water temperature should be controlled within the range of 15-18℃. If the temperature is too high, the plastic molecules will lose their orientation. The product will have no tensile strength and low toughness.

[0117] 1. Warping: Equipment Name: Warping Machine, Wire Coiling: The production process involves distributing the required number of wires on a chain frame, passing the wires through a wire guide, and then winding them. Precisely controlled pressure, between 0.3 and 0.4 MPa, ensures that each warp yarn has the appropriate air pressure to control tension, ensuring the smoothness of the base fabric in the subsequent process. Insufficient air pressure will result in uneven tension on the base fabric, causing wrinkles.

[0118] II. Waterloom: Equipment Name: Waterloom, Base Fabric: Production Process: Wire Coiling → Wire Arranging → Wire Feeding → Warp Flowing → Weft Insertion → Winding. Weaving is performed using specialized logistics-grade woven fibers to produce the base fabric. The key control link is the warp let-off mechanism. The current of the 1200W turbine reducer is controlled between 50 and 80A to control the warp let-off tension. It should not be too high or too low, otherwise the base fabric will be smooth, while too low will result in loose warp and weft.

[0119] 3. Lamination: Equipment Name: Extrusion Laminating Machine, PE Cloth: Production Process: LDPE raw material → extrusion → base fabric → lamination → winding. The base fabric is laminated on both sides to form an LDPE / HDPE / LDPE structure, resulting in a woven fabric specifically for logistics. The raw material formula is 60% LDPE801YY, 34% LLDPE2320#, and 6% masterbatch. Three steps in the production process require precise control:

[0120] 1. The extrusion temperature is set to the optimal temperature in combination with the base fabric speed. The temperature control range is ±1°C. A higher temperature will damage the tensile strength of the base fabric, while a lower temperature will affect the bonding strength. In this embodiment, the base fabric speed is 60m / min and the base fabric preheating temperature is 210°C.

[0121] 2. The pressure should always be maintained at 0.63MPa during lamination. A lower pressure will affect the lamination strength of the product.

[0122] 3. The base fabric preheating temperature is combined with the base fabric wiring speed to set the temperature, which can dry the fabric surface and preheat the base fabric. The temperature control range is ±1°C. Too high a temperature will damage the tensile strength and width of the product, while too low a temperature will affect the adhesion of the composite film.

[0123] Comparative Example 5

[0124] A method for producing a special woven cloth for logistics, comprising the following steps:

[0125] 1. Wire drawing: Equipment name: Flat film extrusion wire drawing machine, flat wire: Production process: HDPE raw material → extrusion → cooling film → slitting → stretching → shaping → winding, to obtain logistics-specific woven fiber. Raw material formula ratio, HDPE500OS95%, Z-25 masterbatch 5%: The four links of the production process must be precisely controlled.

[0126] 1. The cooling water temperature of melt film molding is kept in the range of 36-38℃. The purpose is to prevent the plastic from crystallizing before stretching. Otherwise, if the water temperature is too high, crystallization will occur and affect its tensile strength, while if it is too low, it will affect production operations.

[0127] 2. The temperature of the stretching drying plate is set at the actual operating line speed, which can make the plastic produce a crystallization point state. The accuracy is controlled within ±0.2°C to obtain high-strength products. If the temperature is too low or too high, high-quality products cannot be obtained. The actual operating line speed of this embodiment is 200m / min.

[0128] 3. Based on the precise temperature control of the stretching drying plate at 128℃, the product is stretched at 9 times the speed to allow the plastic molecules to be oriented and then cooled to set. The molecules do not have time to release the orientation, and the product has stable high strength and high toughness.

[0129] 4. The cooling circulating water temperature should be controlled within the range of 15-18℃. If the temperature is too high, the plastic molecules will lose their orientation. The product will have no tensile strength and low toughness.

[0130] 1. Warping: Equipment Name: Warping Machine, Wire Coiling: The production process involves distributing the required number of wires on a chain frame, passing the wires through a wire guide, and then winding them. Precisely controlled pressure, between 0.3 and 0.4 MPa, ensures that each warp yarn has the appropriate air pressure to control tension, ensuring the smoothness of the base fabric in the subsequent process. Insufficient air pressure will result in uneven tension on the base fabric, causing wrinkles.

[0131] II. Waterloom: Equipment Name: Waterloom, Base Fabric: Production Process: Wire Coiling → Wire Arranging → Wire Feeding → Warp Flowing → Weft Insertion → Winding. Weaving is performed using specialized logistics-grade woven fibers to produce the base fabric. The key control link is the warp let-off mechanism. The current of the 1200W turbine reducer is controlled between 50 and 80A to control the warp let-off tension. It should not be too high or too low, otherwise the base fabric will be smooth, while too low will result in loose warp and weft.

[0132] 3. Lamination: Equipment Name: Extrusion Laminating Machine, PE Cloth: Production Process: LDPE raw material → extrusion → base fabric → lamination → winding. The base fabric is laminated on both sides to form an LDPE / HDPE / LDPE structure, resulting in a woven fabric specifically for logistics. The raw material formula is 60% LDPE801YY, 34% LLDPE2320#, and 6% masterbatch. Three steps in the production process require precise control:

[0133] 1. The extrusion temperature is set to the optimal temperature in combination with the base fabric speed. The temperature control range is ±1°C. A higher temperature will damage the tensile strength of the base fabric, while a lower temperature will affect the bonding strength. In this embodiment, the base fabric speed is 60m / min and the base fabric preheating temperature is 210°C.

[0134] 2. The pressure should always be maintained at 0.63MPa during lamination. A lower pressure will affect the lamination strength of the product.

[0135] 3. The temperature set by preheating the base fabric in combination with the base fabric wiring speed can both dry the fabric surface and preheat the base fabric. The temperature control range is ±1°C. Too high a temperature will damage the tensile strength and width of the product, while too low a temperature will affect the adhesion of the composite film.

[0136] Comparative Example 6

[0137] A method for producing a special woven cloth for logistics, comprising the following steps:

[0138] 1. Wire drawing: Equipment name: Flat film extrusion wire drawing machine, flat wire: Production process: HDPE raw material → extrusion → cooling film → slitting → stretching → shaping → winding, to obtain logistics-specific woven fiber. Raw material formula ratio, HDPE500OS95%, Z-25 masterbatch 5%: The four links of the production process must be precisely controlled.

[0139] 1. The cooling water temperature of melt film molding is kept in the range of 36-38℃. The purpose is to prevent the plastic from crystallizing before stretching. Otherwise, if the water temperature is too high, crystallization will occur and affect its tensile strength, while if it is too low, it will affect production operations.

[0140] 2. The temperature of the stretching drying plate is set at the actual operating line speed, which can make the plastic produce a crystallization point state. The accuracy is controlled within ±0.2°C to obtain high-strength products. If the temperature is too low or too high, high-quality products cannot be obtained. The actual operating line speed of this embodiment is 200m / min.

[0141] 3. Based on the precise temperature control of the stretching drying plate at 128℃, the product is stretched at 8.5 times the speed to allow the plastic molecules to be oriented and then shaped through → cooling. The molecules do not have time to release the orientation, and the product has stable high strength and high toughness.

[0142] 4. The cooling circulating water temperature should be controlled within the range of 15-18℃. If the temperature is too high, the plastic molecules will lose their orientation. The product will have no tensile strength and low toughness.

[0143] 1. Warping: Equipment Name: Warping Machine, Wire Coiling: The production process involves distributing the required number of wires on a chain frame, passing the wires through a wire guide, and then winding them. Precisely controlled pressure, between 0.3 and 0.4 MPa, ensures that each warp yarn has the appropriate air pressure to control tension, ensuring the smoothness of the base fabric in the subsequent process. Insufficient air pressure will result in uneven tension on the base fabric, causing wrinkles.

[0144] II. Waterloom: Equipment Name: Waterloom, Base Fabric: Production Process: Wire Coiling → Wire Arranging → Wire Feeding → Warp Flowing → Weft Insertion → Winding. Weaving is performed using specialized logistics-grade woven fibers to produce the base fabric. The key control link is the warp let-off mechanism. The current of the 1200W turbine reducer is controlled between 50 and 80A to control the warp let-off tension. It should not be too high or too low, otherwise the base fabric will be smooth, while too low will result in loose warp and weft.

[0145] 3. Lamination: Equipment Name: Extrusion Laminating Machine, PE Cloth: Production Process: LDPE raw material → extrusion → base fabric → lamination → winding. The base fabric is laminated on both sides to form an LDPE / HDPE / LDPE structure, resulting in a woven fabric specifically for logistics. The raw material formula is 60% LDPE801YY, 34% LLDPE2320#, and 6% masterbatch. Three steps in the production process require precise control:

[0146] 1. The extrusion temperature is set to the optimal temperature in combination with the base fabric speed. The temperature control range is ±1°C. A higher temperature will damage the tensile strength of the base fabric, while a lower temperature will affect the bonding strength. In this embodiment, the base fabric speed is 60m / min and the base fabric preheating temperature is 250°C.

[0147] 2. The pressure should always be maintained at 0.63MPa during lamination. A lower pressure will affect the lamination strength of the product.

[0148] 3. The base fabric preheating temperature is combined with the base fabric wiring speed to set the temperature, which can dry the fabric surface and preheat the base fabric. The temperature control range is ±1°C. Too high a temperature will damage the tensile strength and width of the product, while too low a temperature will affect the adhesion of the composite film.

[0149] Comparative Example 7

[0150] A method for producing a special woven cloth for logistics, comprising the following steps:

[0151] 1. Wire drawing: Equipment name: Flat film extrusion wire drawing machine, flat wire: Production process: HDPE raw material → extrusion → cooling film → slitting → stretching → shaping → winding, to obtain logistics-specific woven fiber. Raw material formula ratio, HDPE500OS95%, Z-25 masterbatch 5%: The four links of the production process must be precisely controlled.

[0152] 1. The cooling water temperature of melt film molding is kept in the range of 36-38℃. The purpose is to prevent the plastic from crystallizing before stretching. Otherwise, if the water temperature is too high, crystallization will occur and affect its tensile strength, while if it is too low, it will affect production operations.

[0153] 2. The temperature of the stretching drying plate is set at the actual operating line speed, which can make the plastic produce a crystallization point state. The accuracy is controlled within ±0.2°C to obtain high-strength products. If the temperature is too low or too high, high-quality products cannot be obtained. The actual operating line speed of this embodiment is 200m / min.

[0154] 3. Based on the precise temperature control of the stretching drying plate at 128℃, the product is stretched at 8.5 times the speed to allow the plastic molecules to be oriented and then shaped through → cooling. The molecules do not have time to release the orientation, and the product has stable high strength and high toughness.

[0155] 4. The cooling circulating water temperature should be controlled within the range of 15-18℃. If the temperature is too high, the plastic molecules will lose their orientation. The product will have no tensile strength and low toughness.

[0156] 1. Warping: Equipment Name: Warping Machine, Wire Coiling: The production process involves distributing the required number of wires on a chain frame, passing the wires through a wire guide, and then winding them. Precisely controlled pressure, between 0.3 and 0.4 MPa, ensures that each warp yarn has the appropriate air pressure to control tension, ensuring the smoothness of the base fabric in the subsequent process. Insufficient air pressure will result in uneven tension on the base fabric, causing wrinkles.

[0157] II. Waterloom: Equipment Name: Waterloom, Base Fabric: Production Process: Wire Coiling → Wire Arranging → Wire Feeding → Warp Flowing → Weft Insertion → Winding. Weaving is performed using specialized logistics-grade woven fibers to produce the base fabric. The key control link is the warp let-off mechanism. The current of the 1200W turbine reducer is controlled between 50 and 80A to control the warp let-off tension. It should not be too high or too low, otherwise the base fabric will be smooth, while too low will result in loose warp and weft.

[0158] 3. Lamination: Equipment Name: Extrusion Laminating Machine, PE Cloth: Production Process: LDPE raw material → extrusion → base fabric → lamination → winding. The base fabric is laminated on both sides to form an LDPE / HDPE / LDPE structure, resulting in a woven fabric specifically for logistics. The raw material formula is 60% LDPE801YY, 34% LLDPE2320#, and 6% masterbatch. Three steps in the production process require precise control:

[0159] 1. The extrusion temperature is set to the optimal temperature in combination with the base fabric speed. The temperature control range is ±1°C. A higher temperature will damage the tensile strength of the base fabric, while a lower temperature will affect the bonding strength. In this embodiment, the base fabric speed is 60m / min and the base fabric preheating temperature is 185°C.

[0160] 2. The pressure should always be maintained at 0.63MPa during lamination. A lower pressure will affect the lamination strength of the product.

[0161] 3. The temperature set by preheating the base fabric in combination with the base fabric wiring speed can both dry the fabric surface and preheat the base fabric. The temperature control range is ±1°C. Too high a temperature will damage the tensile strength and width of the product, while too low a temperature will affect the adhesion of the composite film.

[0162] Effect Example 1

[0163] The performance tests were conducted on the logistics-specific woven fibers and logistics-specific woven fabrics of Examples 1 to 3 and Comparative Examples 1 to 7. The results are shown in Table 1:

[0164] Table 1

[0165]

[0166]

[0167] Note: The acceptance and rejection criteria in Table 1 are internal standards, which are higher than the general industry standards.

[0168] From Table 1 we can see that:

[0169] Compared with the embodiment, the only difference between Comparative Example 1 and Comparative Example 2 is that there is a slight mismatch between the actual operating line speed and the temperature control of the stretching drying plate, which results in a significant decrease in the tensile strength of the single filament, resulting in a decrease in the overall breaking strength, causing the product to fail to meet internal standards and fail to obtain high-strength woven fabric.

[0170] Compared with the embodiment, the only difference of Comparative Example 3 is that the cooling circulating water does not use 15-18°C refrigerated water, but uses room temperature water, which results in a simultaneous decrease in both the tensile strength and elongation of the single yarn, resulting in a decrease in the overall breaking strength, causing the product to fail to meet internal standards and fail to obtain high-strength woven fabric.

[0171] Compared to the examples, the only difference between Comparative Examples 4 and 5 is that the stretching ratio is either too high or too low. Excessively high stretching ratios significantly reduce the tensile strength of the single filaments, while too low stretching ratios significantly reduce the elongation of the single filaments. Both excessive and low stretching ratios result in a decrease in overall breaking strength, resulting in the product failing to meet internal standards and failing to produce a high-strength woven fabric.

[0172] Compared to the examples, the only difference between Comparative Examples 6 and 7 is the mismatch between the base fabric preheating speed and the base fabric preheating temperature. Excessively high temperatures significantly degrade overall mechanical properties, resulting in a breaking strength that fails to meet internal standards and a high-strength woven fabric. Excessively low temperatures lead to poor composite fastness, making it easy to peel after rubbing, failing to meet internal standards and failing to produce a high-strength woven fabric.

[0173] Only by using Examples 1 to 3 of the process of this application, controlling the precise matching of the actual operating line speed and the temperature of the stretching drying plate, using 15-18°C cooling water for cooling circulation, and accurately stretching 8.5 times, and controlling the base fabric wiring speed to match the base fabric preheating temperature in the compounding step, can we obtain a logistics-specific woven fabric with high strength, high toughness, fracture resistance, and a strength always greater than 1230N.

[0174] The above disclosure is merely a preferred embodiment of the present invention and certainly cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope of the present invention.

Claims

1. A method for producing a woven fabric for logistics, characterized in that: The process comprises: after the raw materials are melted and extruded, stretching them under precise temperature control to form a logistics-specific woven fiber, and then weaving the logistics-specific woven fiber to form a logistics-specific woven cloth; stretching them at a speed of 8.5 times the speed under precise temperature control to form the logistics-specific woven fiber; the high crystallization temperature control point is determined according to the actual operating line speed and satisfies the following relationship: T=128℃+0.5℃×(v-200m / min) / 10±δ; Wherein, T is the high crystallization temperature control point, in °C; v is the actual operating line speed, in m / min; δ is the temperature control error, in °C; the actual operating line speed includes 180~250m / min; The steps include: A. Wire drawing: Flat yarn is produced through a flat film extrusion wire drawing machine. The production process includes: HDPE raw material → extrusion → cooling and film formation → slitting → stretching → shaping → winding to obtain the logistics-specific woven fiber. The HDPE raw material includes 95% HDPE5000S and 5% Z-25 masterbatch. B. Warping: The wire is wound and coiled through the warping machine. The production process includes: the chain rack distributes the required number of wires → passes the wire guide device → coils and reels; C. Water loom: The base fabric is produced by a water loom. The production process includes: wire winding → wire arrangement → wire feeding → warp yarn fluctuation → weft insertion → winding to obtain the base fabric; D. Lamination: PE cloth is produced by an extrusion laminating machine. The production process includes: LDPE raw material → extrusion → preheating of base cloth → lamination of both sides → winding to form an LDPE / HDPE / LDPE structure to obtain the logistics-specific woven cloth. The LDPE raw material includes 60% LDPE801YY, 34% LLDPE2320#, and 6% masterbatch. The base cloth wiring speed is 60 m / min. The base cloth preheating temperature is 210°C. In step A, the following four production links are precisely controlled: A1. During the cooling and film forming step, the cooling water for molten film forming is maintained at 36-38°C; A 2. During the stretching step, the temperature of the stretching plate is set according to the actual operating line speed, and the accuracy is controlled within ± 0.2℃ to obtain high-strength products; A 3. During the stretching step, the product is stretched at 8.5 times the speed based on the precise temperature control of the stretching drying plate; A4. In the shaping step, the cooling temperature of the cooling circulating water is controlled in the range of 15-18° C. to obtain the logistics-specific woven fiber.

2. The method for making the logistics-specific woven cloth according to claim 1, characterized in that: The temperature control error is 0.2°C.

3. The method for making the logistics-specific woven cloth according to claim 1, characterized in that: In step B, the following production links are precisely controlled: B1. During the winding step, the pressure is controlled between 0.3 and 0.4 MPa so that each warp yarn has appropriate air pressure to control its tension; In step C, the following production links are precisely controlled: C1. During the wire feeding step, the current of the 1200W turbine reducer of the warp feeding device is controlled between 50 and 80A; In step D, the following three production links are precisely controlled: D1. In the extrusion step, the extrusion temperature is set to the optimal temperature in combination with the base wiring speed, and the temperature control range is ±1°C; D2. In the base fabric preheating step, the base fabric preheating temperature is set in combination with the base fabric wiring speed, and the temperature control range is ±1°C; During the compounding step D3, the pressure is always maintained at 0.6 MPa to 0.65 MPa.

4. A special woven fabric for logistics obtained by the method for making special woven fabric for logistics as claimed in claim 1.

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