Anti-static winding pipe and manufacturing process thereof

Abstract

The invention provides an anti-static winding pipe and a manufacturing process thereof, and relates to the technical field of winding pipes. The anti-static winding pipe comprises a winding pipe body, the winding pipe body is spirally arranged in the axial direction, a spiral opening is formed in the center of the winding pipe body, the winding pipe body comprises outer layers and a middle conducting layer which are connected from head to tail in the length direction, and on the section of the winding pipe body in the length direction, the outer layers are located on the two sides of the middle conducting layer in the width direction; the width of the middle conductive layer is smaller than that of the outer layer, and the outer edge of the middle conductive layer in the thickness direction and the outer edge of the outer layer in the thickness direction are located on the same straight line. The outer layer has a good flame retardant effect and wear resistance, the middle conducting layer is internally provided with a conducting material, the conducting effect is achieved, static electricity can be taken away through the middle conducting layer in the using process, through the material and structural design, the static electricity can be rapidly dissipated, and damage of the static electricity to winding pipe sleeved equipment and products is reduced; the anti-static winding pipe can effectively reduce cost and is more economical and practical.

Description

Technical Field

[0001] The present invention relates to the technical field of winding tubes, and in particular to an anti-static winding tube and its manufacturing process. Background Art

[0002] In many industrial fields such as electronics, chemical industry, and precision instrument manufacturing, static electricity may cause serious damage to equipment and products. Therefore, the static electricity problem has always been a key factor affecting product quality and the stable operation of equipment. Traditional winding tubes only play a simple physical protection role, and their materials and structures determine that they cannot effectively handle static electricity. In some environments sensitive to static electricity, the accumulation of static electricity may cause damage to electronic components and an increase in the defective rate of products, and even lead to safety accidents in flammable and explosive environments due to static electricity sparks.

[0003] Although some anti-static winding tubes have emerged on the market, such winding tubes generally choose to directly add a certain proportion of conductive masterbatch during the extrusion molding process of the tube body for one-piece molding. Such winding tubes have the following disadvantages: 1. Conductive masterbatch usually fills a large amount of graphite carbon black to play a conductive role, which will greatly weaken the mechanical properties such as the tensile strength of the tube body and reduce the service life of the winding tube; 2. The cost of conductive masterbatch is higher than that of raw materials such as PE and PP, which raises the product cost; 3. The carbon black component of a large amount of added conductive masterbatch will play a role in promoting combustion, and often affects the flame retardant effect of winding tubes with flame retardant properties. Summary of the Invention

[0004] The purpose of the present invention is to provide an anti-static winding tube and its manufacturing process to solve the technical problems existing in the prior art. The many technical effects that can be produced by the preferred technical solutions provided by the present invention are described in detail below.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] An anti-static winding tube, comprising a winding tube body, the winding tube body is spirally arranged along the axial direction and forms a spiral opening in the center, the winding tube body includes an outer layer and an intermediate conductive layer connected from the head to the tail along the length direction, in the cross-section of the winding tube body in the length direction, the outer layer is located on both sides of the intermediate conductive layer in the width direction, the width of the intermediate conductive layer is smaller than the width of the outer layer, and the outer edge in the thickness direction of the intermediate conductive layer and the outer edge in the thickness direction of the outer layer are located on the same straight line.

[0007] Preferably, in the cross-section of the winding tube body in the length direction, the inner edge in the thickness direction of the intermediate conductive layer is covered by the outer layer, so that the thickness of the intermediate conductive layer is smaller than the thickness of the outer layer.

[0008] Preferably, on the cross-section in the length direction of the winding tube body, the inner edge in the thickness direction of the intermediate conductive layer and the inner edge in the thickness direction of the outer layer are located on the same straight line, so that the intermediate conductive layer and the outer layer have the same thickness.

[0009] Preferably, a plurality of spirals are sequentially formed along the axial direction of the winding tube body, and a gap is formed between two adjacent spirals.

[0010] Preferably, the widths of two sections of the outer layer located on both sides in the width direction of the intermediate conductive layer are the same.

[0011] Preferably, the preparation material of the outer layer includes 70-90 parts by mass of thermoplastic pellets, 5-10 parts by mass of flame retardant, 1-2 parts by mass of antioxidant, and 1-2 parts by mass of black masterbatch.

[0012] Preferably, the preparation material of the intermediate conductive layer includes 50-60 parts by mass of conductive masterbatch and 40-60 parts by mass of thermoplastic pellets.

[0013] A manufacturing process of an anti-static winding tube includes the following steps:

[0014] S1. Separately manufacture the outer layer material body and the intermediate conductive layer material body, and the outer layer material body and the intermediate conductive layer material body are respectively transported to the front extrusion die through separate runners;

[0015] S2. The outer layer material body and the intermediate conductive layer material body converge inside the front extrusion die and are cross-compounded to form an extruded melt;

[0016] S3. The extruded melt flows out through the same runner, converges at the outlet of the extrusion die, and is co-extruded from the die to form a molten tape;

[0017] S4. Transport the molten tape to a spiral rotating die for shaping to make an anti-static winding tube.

[0018] Preferably, the separately manufacturing the outer layer material body and the intermediate conductive layer material body, and the outer layer material body and the intermediate conductive layer material body are respectively transported to the front extrusion die through separate runners includes:

[0019] Put the preparation material of the outer layer into a first mixer, and the first mixer mixes the corresponding preparation materials and transports them to a first extruder. The first extruder extrudes the outer layer material body, and the extruded outer layer material body is transported to the front extrusion die through a separate runner;

[0020] Meanwhile, put the preparation material of the middle conductive layer into the second mixer. The second mixer mixes the corresponding preparation material and then transports it to the second extruder. The second extruder extrudes the middle conductive layer material, and the extruded middle conductive layer material is transported to the front extrusion die through a separate runner.

[0021] Preferably, the extrusion temperature of the first extruder is 180°C to 200°C, and the extrusion temperature of the second extruder is 180°C to 210°C.

[0022] The beneficial effects of the present invention are as follows: The outer layer has good flame retardant effect and wear resistance. The middle conductive layer is provided with conductive materials and has a conductive effect. During use, static electricity can be carried away through the middle conductive layer. Through material and structure design, static electricity can be quickly dissipated, reducing the damage of static electricity to the equipment and products covered by the winding tube;

[0023] Since the width of the middle conductive layer is smaller than that of the outer layer, the outer layer occupies most of the volume, and its combination with the middle conductive layer that occupies a small part of the volume has a certain economy;

[0024] The anti-static winding tube can provide good protection, has excellent flame retardant performance and wear resistance, prolongs the service life, can effectively eliminate static electricity, solve static electricity hazards, and can also effectively reduce costs, making it more economical and affordable. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0026] Figure 1 It is the front view structure diagram of the anti-static winding tube of the present invention;

[0027] Figure 2 is Figure 1 the enlarged structure diagram at A in

[0028] Figure 3 It is the side view structure diagram of the anti-static winding tube of the present invention;

[0029] In the figure, 1 is the winding tube body; 11 is the outer layer; 12 is the middle conductive layer;

[0030] 2 is the spiral opening. DETAILED DESCRIPTION OF THE INVENTION

[0031] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other implementation manners obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope protected by the present invention.

[0032] In the description of the present invention, it should be understood that the terms "center", "lateral", "length", "width", "height", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "side", etc. indicate the orientation or positional relationship based on the Figure 1 orientation or positional relationship shown, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0033] In the description of the present invention, it should also be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] Referring to Figures 1 to 3 , the present invention provides an anti-static winding tube, including a winding tube body 1;

[0035] The winding tube body 1 is spirally arranged along the axial direction, and two free ends are respectively formed at both axial ends. A spiral opening 2 is formed in the center of the winding tube body 1, and the spiral opening 2 is conducive to the connection between the winding tube body 1 and the object to be connected;

[0036] The winding tube body 1 includes an outer layer 11 and an intermediate conductive layer 12 connected from the head to the tail along the length direction. The outer layer 11 and the intermediate conductive layer 12 are always arranged in the length direction;

[0037] In the cross-section of the winding tube body 1 in the length direction, the outer layer 11 is located on both sides of the intermediate conductive layer 12 in the width direction. The width of the intermediate conductive layer 12 is smaller than the width of the outer layer 11. The outer edges of the intermediate conductive layer 12 in the thickness direction and the outer edges of the outer layer 11 in the thickness direction are on the same straight line, and the intermediate conductive layer 12 can be in contact with the outside on this side.

[0038] The outer layer 11 has good flame retardant effect and wear resistance. The middle conductive layer 12 is provided with a conductive material and has a conductive effect. During use, static electricity can be carried away through the middle conductive layer 12. Through material and structure design, static electricity can be quickly dissipated, reducing the damage of static electricity to the equipment and products covered by the winding tube.

[0039] Since the width of the middle conductive layer 12 is smaller than that of the outer layer 11, and the width ratio of the middle conductive layer 12 to the outer layer 11 is preferably 2 - 3:10 - 15, the outer layer 11 occupies most of the volume. Its combination with the middle conductive layer 12 that occupies a small part of the volume has a certain economy.

[0040] In this embodiment, the outer layer 11 and the middle conductive layer 12 are preferably formed by co - extrusion process. By extruding a large amount of thermoplastic materials for hot - state forming, the cost is effectively reduced. The middle conductive layer 12 is provided with a conductive material and has excellent conductive effect.

[0041] The anti - static winding tube can provide good protection, has excellent flame retardant performance and wear resistance, extends the service life, can effectively eliminate static electricity, solve the static electricity hidden danger, and can also effectively reduce the cost, being more economical and affordable.

[0042] Considering the anti - static effect, flame retardant effect, service life and use cost comprehensively, the anti - static winding tube mentioned in this embodiment does not affect its mechanical properties such as tensile strength under the condition of having an anti - static effect and can meet the requirements of service life.

[0043] As an alternative implementation, although the outer edge of the middle conductive layer 12 in the thickness direction and the outer edge of the outer layer 11 in the thickness direction are on the same straight line, resulting in a clear limitation of the outer edge of the middle conductive layer 12 and the outer edge of the outer layer 11 in the thickness direction, in this embodiment, there are relatively rich selection and setting methods for the relative position relationship between the inner edge of the middle conductive layer 12 and the inner edge of the outer layer 11 in the thickness direction.

[0044] In some application scenarios, on the cross - section in the length direction of the winding tube body 1, the inner edge of the middle conductive layer 12 in the thickness direction can be covered by the outer layer 11. In this state, the inner edge of the middle conductive layer 12 in the thickness direction does not form a through - setting effect, and the thickness of the middle conductive layer 12 is smaller than that of the outer layer 11.

[0045] Or, in some application scenarios, on the cross - section in the length direction of the winding tube body 1, the inner edge of the middle conductive layer 12 in the thickness direction and the inner edge of the outer layer 11 in the thickness direction are on the same straight line. In this state, the inner edge of the middle conductive layer 12 in the thickness direction can form a through - setting effect, and the thickness of the middle conductive layer 12 is the same as that of the outer layer 11.

[0046] Therefore, according to actual usage requirements, the final positional relationship of the inner edge in the thickness direction of the intermediate conductive layer 12 can be flexibly determined.

[0047] As an alternative embodiment, a plurality of spirals are sequentially formed along the axial direction of the winding tube body 1, and preferably, the adjacent spirals are arranged in a closely connected manner, thereby effectively ensuring the protective performance;

[0048] Meanwhile, a gap is preferably formed between two adjacent spirals. The design of the gap here enables the winding tube body 1 to flexibly adapt to winding operations on objects to be wound with different diameters. If the diameter of the object to be wound is large, effective adjustment can be made through the gap, enabling the winding tube body 1 to have a wider range of applications;

[0049] In addition, all the gaps on the same winding tube body 1 preferably have the same specification dimensions, which is conducive to production and manufacturing. In this embodiment, the specific specification dimensions of the gap can be flexibly selected during the production and manufacturing process according to actual usage requirements.

[0050] As an alternative embodiment, although the outer layers 11 are provided on both sides in the width direction of the intermediate conductive layer 12, no specific restrictions are imposed on the widths respectively corresponding to the two outer layers 11 on both sides. The widths respectively corresponding to the two outer layers 11 on both sides can be the same or different. And under the condition of being different, the width of the left outer layer 11 can be either greater than or less than the width of the right outer layer 11, and can be flexibly selected and set during the production and manufacturing process according to actual usage requirements;

[0051] In this embodiment, it is preferably set that the widths of the two outer layers 11 located on both sides in the width direction of the intermediate conductive layer 12 are the same. With such a setting, it is easy for production and manufacturing, and can effectively control the positional relationship between the intermediate conductive layer 12 and the two outer layers 11.

[0052] As an alternative embodiment, the preparation materials of the outer layer 11 include 70 - 90 parts by mass of thermoplastic pellets, 5 - 10 parts by mass of flame retardant, 1 - 2 parts by mass of antioxidant, and 1 - 2 parts by mass of black masterbatch;

[0053] The thermoplastic pellets can preferably be materials such as PP, PE, and HDPE, etc. And such low-cost materials account for most of the proportion of the outer layer 11, which can effectively control the overall cost of the winding tube body 1;

[0054] The flame retardant can preferably be at least one of melamine, melamine cyanurate, tris(1,3-dichloro-2-propyl) phosphate, dithiocyclic phosphate, vinyl diethyl ester, N-hydroxymethyl-3-(dioxophosphoryl) propanamide, diphenyl isooctyl phosphite, and resorcinol bis(diphenyl phosphate);

[0055] The antioxidant can preferably be at least one of tris(2,4-di-tert-butylphenyl) phosphite, 4,4'-methylenebis(2,6-di-tert-butylphenol), bis(octadecyl) thiodipropionate, pentaerythritol tetra[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate], and N,N'-bis[3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionyl] hydrazine.

[0056] As an alternative embodiment, the material for preparing the intermediate conductive layer 12 includes 50 to 60 parts by mass of a conductive masterbatch and 40 to 60 parts by mass of thermoplastic pellets. The thermoplastic pellets can account for approximately half of the parts by mass and can also play a role in controlling the overall cost of the winding tube body 1.

[0057] The outer layer 11 and the intermediate conductive layer 12 are formed by co-extrusion. A large amount of thermoplastic materials are used in both the outer layer 11 and the intermediate conductive layer 12. The thermoplastic materials are extruded and formed in a hot state, effectively reducing the cost. The intermediate conductive layer 12 is provided with a conductive masterbatch, which has excellent conductive effects.

[0058] The present invention also provides a manufacturing process for an anti-static winding tube, including the following steps:

[0059] S1. The outer layer material and the intermediate conductive layer material are separately prepared. The outer layer material and the intermediate conductive layer material are respectively transported to the front extrusion die through separate runners.

[0060] For separately preparing the outer layer material, it specifically includes putting the material for preparing the outer layer 11 into a first mixer. The first mixer mixes the corresponding materials and transports them to a first extruder. The first extruder extrudes the outer layer material, and the extruded outer layer material is transported to the front extrusion die through a separate runner.

[0061] For separately preparing the intermediate conductive layer material, it specifically includes putting the material for preparing the intermediate conductive layer 12 into a second mixer. The second mixer mixes the corresponding materials and transports them to a second extruder. The second extruder extrudes the intermediate conductive layer material, and the extruded intermediate conductive layer material is transported to the front extrusion die through a separate runner.

[0062] Simultaneously preparing the outer layer material and the intermediate conductive layer material can improve efficiency.

[0063] The material for preparing the outer layer 11 preferably includes 70 to 90 parts by mass of thermoplastic pellets, 5 to 10 parts by mass of a flame retardant, 1 to 2 parts by mass of an antioxidant, and 1 to 2 parts by mass of a black masterbatch.

[0064] The preparation material of the middle conductive layer 12 preferably includes 50 to 60 parts by mass of conductive masterbatch and 40 to 60 parts by mass of thermoplastic pellets;

[0065] According to actual usage needs, the specific mass fraction combination of the outer layer 11 and the middle conductive layer 12 can be flexibly adjusted.

[0066] The extrusion temperature of the first extruder is 180°C to 200°C, and the extrusion temperature of the second extruder is 180°C to 210°C. According to actual usage needs, the specific extrusion temperatures of the first extruder and the second extruder can be flexibly adjusted.

[0067] S2. The outer layer material and the middle conductive layer material converge inside the front extrusion die and are compounded at the intersection, which can improve the adhesion to a certain extent to form an extruded melt. For the extruded melt at this time, the outer layer material and the middle conductive layer material are not completely fused together and have a certain degree of independence;

[0068] The structural form of the flow channel corresponding to the outer layer material and the structural form of the flow channel corresponding to the middle conductive layer material here respectively match the structural forms of the outer layer 11 and the middle conductive layer 12, which facilitates the subsequent extrusion.

[0069] S3. The extruded melt flows out through the same flow channel, converges at the outlet of the extrusion die, and is jointly extruded from the die to form a molten tape;

[0070] For the molten tape at this time, the outer layer material and the middle conductive layer material can be fused together and formed into a hot state by extrusion.

[0071] S4. The molten tape is conveyed into the spiral rotating die, and then undergoes hot-state water cooling shaping through the spiral rotating die. And through the continuous rotation of the spiral rotating die, the required anti-static winding tube is made.

[0072] For the anti-static winding tube made by the above manufacturing process, its outer layer 11 has good flame retardant effect and wear resistance. The middle conductive layer 12 is provided with a conductive material and has a conductive effect. During use, static electricity can be carried away through the middle conductive layer 12. Through material and structure design, static electricity can be quickly dissipated, reducing the damage of static electricity to the equipment and products covered by the winding tube;

[0073] The outer layer 11 and the middle conductive layer 12 are formed by co-extrusion process. By extruding a large amount of thermoplastic materials into a hot state for shaping, the cost is effectively reduced. The middle conductive layer 12 is provided with a conductive material and has excellent conductive effect;

[0074] The anti-static winding tube can provide good protection, has excellent flame retardant and wear resistance properties, extends the service life, and can effectively eliminate static electricity, solve static electricity hazards, and can also effectively reduce costs, making it more economical and affordable;

[0075] Considering the anti-static effect, flame retardant effect, service life, and usage cost comprehensively, the anti-static winding tube mentioned in this embodiment, while having an anti-static effect, will not affect its mechanical properties such as tensile strength and can meet the requirements of service life.

[0076] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. An anti-static winding tube, characterized in that, It includes a wound tube body (1), the wound tube body (1) is spirally arranged along the axis and forms a spiral opening (2) in the center. The wound tube body (1) includes an outer layer (11) and an intermediate conductive layer (12) connected from the head to the tail along the length direction. In the cross-section of the wound tube body (1) in the length direction, the outer layer (11) is located on both sides of the intermediate conductive layer (12) in the width direction. The width of the intermediate conductive layer (12) is smaller than the width of the outer layer (11), and the outer edge of the intermediate conductive layer (12) in the thickness direction is on the same straight line as the outer edge of the outer layer (11) in the thickness direction.

2. The anti-static winding tube according to claim 1, wherein In the cross-section of the wound tube body (1) in the length direction, the inner edge of the intermediate conductive layer (12) in the thickness direction is covered by the outer layer (11), so that the thickness of the intermediate conductive layer (12) is smaller than the thickness of the outer layer (11).

3. The anti-static winding tube according to claim 1, wherein In the cross-section of the wound tube body (1) in the length direction, the inner edge of the intermediate conductive layer (12) in the thickness direction is on the same straight line as the inner edge of the outer layer (11) in the thickness direction, so that the thickness of the intermediate conductive layer (12) is the same as the thickness of the outer layer (11).

4. The anti-static winding tube according to claim 1, wherein, The wound tube body (1) sequentially forms a plurality of spirals along the axis, and a gap is formed between two adjacent spirals.

5. The anti-static winding tube according to claim 1, characterized in that, The widths of the two sections of the outer layer (11) located on both sides of the intermediate conductive layer (12) in the width direction are the same.

6. The anti-static winding tube according to claim 1, wherein The preparation material of the outer layer (11) includes 70-90 parts by mass of thermoplastic pellets, 5-10 parts by mass of flame retardant, 1-2 parts by mass of antioxidant, and 1-2 parts by mass of black masterbatch.

7. The anti-static winding tube according to claim 1, wherein, The preparation material of the intermediate conductive layer (12) includes 50-60 parts by mass of conductive masterbatch and 40-60 parts by mass of thermoplastic pellets.

8. A manufacturing process for an anti-static winding tube, characterized in that, It includes the following steps: S1. Separate the outer layer material body and the intermediate conductive layer material body respectively. The outer layer material body and the intermediate conductive layer material body are respectively transported to the front extrusion die through separate runners; S2. The outer layer material body and the intermediate conductive layer material body converge inside the front extrusion die and are cross-compounded to form an extruded melt; S3. The extruded melt flows out through the same runner, converges at the outlet of the extrusion die, and is jointly extruded out of the die to form a molten tape; S4. The molten tape is transported to a spiral rotating die for shaping to make an anti-static wound tube.

9. The manufacturing process according to claim 8, wherein, The separate production of the outer layer material body and the intermediate conductive layer material body, and the outer layer material body and the intermediate conductive layer material body are respectively transported to the front extrusion die through separate runners, including: Put the preparation material of the outer layer into the first mixer. The first mixer mixes the corresponding preparation materials and transports them to the first extruder. The first extruder extrudes the outer layer material body, and the extruded outer layer material body is transported to the front extrusion die through a separate runner; Meanwhile, the preparation material of the middle conductive layer is put into a second mixer, and the second mixer mixes the corresponding preparation material and then conveys it to a second extruder. The second extruder extrudes the middle conductive layer material body, and the extruded middle conductive layer material body is conveyed to the front extrusion die through a separate runner.

10. The manufacturing process according to claim 9, characterized in that, The extrusion temperature of the first extruder is 180°C to 200°C, and the extrusion temperature of the second extruder is 180°C to 210°C.

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