Plastic roll core pipe and preparation method thereof

Abstract

The invention relates to the field of roll core pipes, aims at solving the problem that an existing roll core pipe is insufficient in bending resistance, and provides a plastic roll core pipe which comprises a tubular base body and filling particles embedded in the tubular base body. The tubular base body is cooled to 5-45 DEG C from the melting temperature, and the volume shrinkage rate of the filling particles is larger than that of the tubular base body; the melting point of the filling particles is higher than that of the tubular base body. The cooling process of the product after melt extrusion molding is utilized, controllable pores are formed in the core winding pipe, the porosity of the pipe body is controlled after the base material and the filling particles are specifically selected, the bending resistance of the core winding pipe is improved, and the weight can be reduced to a certain degree; the carbon fibers and the tubular base body are chemically combined, so that the mechanical performance of the roll core tube can be integrally improved, the performance degradation of the roll core tube after long-term storage is reduced, and the influence of the addition of the carbon fibers on the regulation and control of the overall porosity of the tube body in the cooling process can be reduced or avoided.

Description

Technical Field

[0001] This invention relates to the field of wound tubes, and more specifically, to a plastic wound tube and its preparation method. Background Technology

[0002] Core tubes are hollow tubular plastic products primarily used in industrial applications for supporting rolled materials, such as films, tapes, solar films, and fabrics, providing protection and winding. In addition, plastic core tubes are widely used in construction, electrical engineering, and packaging industries as pipes, protective tubes, or supporting structures. The performance requirements for plastic core tubes vary depending on the application scenario. When the material to be wound is wide and heavy, the physical properties of the plastic core tube are more demanding. During rotation, the core tube is supported at both ends but not in the middle. If the weight of the material to be wound is too high, the core tube may collapse or bend. To address these issues, existing technologies either increase the thickness of the core tube or reduce the length or width of the material to be wound, ultimately limiting the applications of core tubes. Summary of the Invention

[0003] The purpose of this invention is to provide a plastic core tube and its preparation method, thereby solving the problem of insufficient bending resistance of existing core tubes.

[0004] The embodiments of the present invention are achieved through the following technical solutions: A plastic core tube includes: a tubular matrix and filler particles embedded in the tubular matrix; when cooled from the melting temperature of the tubular matrix to 5-45°C, the volume shrinkage rate of the filler particles is greater than that of the tubular matrix; the melting point of the filler particles is higher than that of the tubular matrix.

[0005] This invention utilizes the cooling process after the matrix material and filler material are melt-extruded together. The filler material shrinks more than the matrix material, resulting in a tubular matrix containing not only porosity but also mechanically sound filler particles acting as reinforcing aggregate. The presence of porosity not only increases the overall bending resistance of the core tube but also reduces its weight. The increased bending resistance is primarily due to the fact that the micropores prevent excessive stress concentration and inhibit the propagation of internal microcracks, forcing cracks to bypass or branch, thus consuming more energy. However, the relationship between porosity and the physical properties of the core tube is not linear, nor is it a monotonically increasing or decreasing relationship. Therefore, the material type, filler particle size, and their proportion are all crucial.

[0006] Preferably, the tubular matrix comprises: acrylonitrile-butadiene-styrene copolymer; and the filler particles comprise: polyetheretherketone.

[0007] Preferably, the tubular matrix comprises 100-150 parts by weight, and the filler particles comprise 20-40 parts by weight.

[0008] Preferably, the tubular matrix further includes carbon fibers, which account for 8wt%-12wt% of the tubular matrix.

[0009] The addition of carbon fiber can further reduce or prevent the generation and propagation of microcracks inside the core tube, thereby improving the mechanical properties of the core tube.

[0010] Preferably, the particle size of the filler particles is 200-400 μm.

[0011] A method for preparing a plastic core tube includes: S100: Acrylonitrile-butadiene-styrene prepolymer, modified carbon fiber, and coupling agent are mixed and reacted, then a crosslinking agent is added and reacted, and the product is obtained after dehydration and drying. S200, the preproduct and polyetheretherketone granules are melt-extruded to obtain a plastic core tube.

[0012] After coupling carbon fiber with acrylonitrile-butadiene-styrene prepolymer, further increasing the degree of polymer crosslinking not only yields a tubular matrix with superior performance but also establishes a chemical bond between the carbon fiber and the acrylonitrile-butadiene-styrene copolymer. During subsequent melt extrusion, the compatibility between the two is better, and the uniformity of the carbon fiber is improved, enhancing the mechanical properties and weather resistance of the tubular matrix. Especially after long-term storage, the bonding between the carbon fiber and the tubular matrix remains good, and the mechanical property degradation is reduced. Furthermore, it avoids uncontrollable gaps between the two during melt cooling, which could affect the effectiveness of porosity control through filler particles and ultimately impact the product's mechanical properties. The melt extrusion temperature can be selected from 200-240℃.

[0013] Preferably, the method for preparing the modified carbon fiber includes: plasma activation treatment of the carbon fiber in a vacuum environment using oxygen as a gas source to obtain the modified carbon fiber; the plasma activation treatment time is 12-18 min and the power is 80-120 W.

[0014] Modified carbon fibers can have more hydroxyl groups on their surface, making it easier and more tightly bonded to the tubular matrix.

[0015] Preferably, the coupling agent includes KH 550; the coupling agent accounts for 1wt%-3wt% of the modified carbon fiber; the coupling reaction temperature is 80-120℃, and the time is 3-5h.

[0016] Preferably, the crosslinking agent includes dicumyl peroxide or benzoyl peroxide; the crosslinking agent accounts for 0.5wt%-1.5wt% of the acrylonitrile-butadiene-styrene prepolymer; the crosslinking reaction temperature is 120-160℃, and the time is 15-30min.

[0017] Preferably, the preparation method of the acrylonitrile-butadiene-styrene prepolymer includes: mixing 140-180 parts by weight of deionized water, 40-60 parts by weight of polybutadiene latex and 0.1-0.2 parts by weight of benzoyl peroxide, then adding 25-35 parts by weight of styrene, 8-12 parts by weight of acrylonitrile, 0.4-1.2 parts by weight of methyl methacrylate, 0.2-0.5 parts by weight of tert-dodecyl mercaptan and 2-4 parts by weight of emulsifier, and reacting at 80℃-100℃ for 3-5 hours to obtain the acrylonitrile-butadiene-styrene prepolymer.

[0018] By controlling the degree of polymerization of the prepolymer and providing its emulsion system, carbon fibers are more easily and uniformly dispersed after being added to the prepolymer.

[0019] The present invention has at least the following beneficial effects: This invention utilizes the cooling process after melt extrusion molding to create controllable porosity in the core tube. By specifically selecting the matrix material and filler particles, the porosity of the tube can be controlled, which not only improves the bending resistance of the core tube but also reduces its weight to a certain extent. The chemical bonding between the carbon fiber and the tubular matrix not only improves the overall mechanical properties of the core tube and reduces its performance degradation after long-term storage, but also reduces or avoids the impact of the addition of carbon fiber on the overall porosity control of the tube during the cooling process. Detailed Implementation

[0020] To make the objectives, methods, and advantages of the embodiments of the present invention clearer, the methods in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments.

[0021] Example 1: A plastic core tube, comprising: a tubular matrix and filler particles embedded within the tubular matrix; when cooled from the melting temperature of the tubular matrix to 5-45°C, the volume shrinkage rate of the filler particles is greater than that of the tubular matrix; the melting point of the filler particles is higher than that of the tubular matrix. The tubular matrix comprises: acrylonitrile-butadiene-styrene copolymer; the filler particles comprise: polyetheretherketone; by weight, the tubular matrix comprises 100 parts and the filler particles comprise 20 parts. The tubular matrix further comprises: carbon fiber, the carbon fiber accounting for 8 wt% of the tubular matrix. The particle size of the filler particles is 200 μm.

[0022] Example 2: A plastic core tube, comprising: a tubular matrix and filler particles embedded within the tubular matrix; when cooled from the melting temperature of the tubular matrix to 5-45°C, the volume shrinkage rate of the filler particles is greater than that of the tubular matrix; the melting point of the filler particles is higher than that of the tubular matrix. The tubular matrix comprises: acrylonitrile-butadiene-styrene copolymer; the filler particles comprise: polyetheretherketone; by weight, the tubular matrix comprises 150 parts and the filler particles comprise 40 parts. The tubular matrix further comprises: carbon fiber, the carbon fiber accounting for 12 wt% of the tubular matrix. The particle size of the filler particles is 400 μm.

[0023] Example 3: A plastic core tube, comprising: a tubular matrix and filler particles embedded within the tubular matrix; when cooled from the melting temperature of the tubular matrix to 5-45°C, the volume shrinkage rate of the filler particles is greater than that of the tubular matrix; the melting point of the filler particles is higher than that of the tubular matrix. The tubular matrix comprises: acrylonitrile-butadiene-styrene copolymer; the filler particles comprise: polyetheretherketone; by weight, the tubular matrix comprises 120 parts and the filler particles comprise 30 parts. The tubular matrix further comprises: carbon fiber, the carbon fiber accounting for 10 wt% of the tubular matrix. The particle size of the filler particles is 300 μm.

[0024] Example 4: A method for preparing a plastic core tube, comprising: S100: Acrylonitrile-butadiene-styrene prepolymer, modified carbon fiber, and coupling agent are mixed and reacted, then a crosslinking agent is added and reacted, and the product is obtained after dehydration and drying. S200. The preproduct and polyetheretherketone particles are melt-extruded at 220°C and cooled to room temperature to obtain a plastic core tube.

[0025] The method for preparing the modified carbon fiber includes: plasma activation treatment of carbon fiber in a vacuum environment using oxygen as the gas source to obtain modified carbon fiber; the plasma activation treatment time is 12 min and the power is 80 W.

[0026] The coupling agent includes KH 550; the coupling agent accounts for 1 wt% of the modified carbon fiber; the coupling reaction temperature is 80℃ and the time is 3h.

[0027] The crosslinking agent includes benzoyl peroxide; the crosslinking agent accounts for 0.5 wt% of the acrylonitrile-butadiene-styrene prepolymer; the crosslinking reaction temperature is 120°C and the time is 15 min.

[0028] The preparation method of the acrylonitrile-butadiene-styrene prepolymer includes: mixing 140 parts by weight of deionized water, 40 parts by weight of polybutadiene latex and 0.1 parts by weight of benzoyl peroxide, then adding 25 parts by weight of styrene, 8 parts by weight of acrylonitrile, 0.4 parts by weight of methyl methacrylate, 0.2 parts by weight of tert-dodecyl mercaptan and 2 parts by weight of emulsifier: sodium dodecylbenzene sulfonate, and reacting at 80°C for 3 hours to obtain the acrylonitrile-butadiene-styrene prepolymer.

[0029] Example 5: A method for preparing a plastic core tube, comprising: S100: Acrylonitrile-butadiene-styrene prepolymer, modified carbon fiber, and coupling agent are mixed and reacted, then a crosslinking agent is added and reacted, and the product is obtained after dehydration and drying. S200. The preproduct and polyetheretherketone particles are melt-extruded at 220°C and cooled to room temperature to obtain a plastic core tube.

[0030] The method for preparing the modified carbon fiber includes: plasma activation treatment of carbon fiber in a vacuum environment using oxygen as the gas source to obtain modified carbon fiber; the plasma activation treatment time is 18 min and the power is 120 W.

[0031] The coupling agent includes KH 550; the coupling agent accounts for 3 wt% of the modified carbon fiber; the coupling reaction temperature is 120℃ and the time is 5 h.

[0032] The crosslinking agent includes dicumyl peroxide; the crosslinking agent accounts for 1.5 wt% of the acrylonitrile-butadiene-styrene prepolymer; the crosslinking reaction temperature is 160°C and the time is 30 min.

[0033] The preparation method of the acrylonitrile-butadiene-styrene prepolymer includes: mixing 180 parts by weight of deionized water, 60 parts by weight of polybutadiene latex and 0.2 parts by weight of benzoyl peroxide, then adding 35 parts by weight of styrene, 12 parts by weight of acrylonitrile, 1.2 parts by weight of methyl methacrylate, 0.5 parts by weight of tert-dodecyl mercaptan and 4 parts by weight of emulsifier: sodium dodecylbenzene sulfonate, and reacting at 100°C for 5 hours to obtain the acrylonitrile-butadiene-styrene prepolymer.

[0034] Example 6: A method for preparing a plastic core tube, comprising: S100: Acrylonitrile-butadiene-styrene prepolymer, modified carbon fiber, and coupling agent are mixed and reacted, then a crosslinking agent is added and reacted, and the product is obtained after dehydration and drying. S200. The preproduct and polyetheretherketone particles are melt-extruded at 220°C and cooled to room temperature to obtain a plastic core tube.

[0035] The method for preparing the modified carbon fiber includes: plasma activation treatment of carbon fiber in a vacuum environment using oxygen as the gas source to obtain modified carbon fiber; the plasma activation treatment time is 15 min and the power is 100 W.

[0036] The coupling agent includes KH 550; the coupling agent accounts for 2 wt% of the modified carbon fiber; the coupling reaction temperature is 100℃ and the time is 4 h.

[0037] The crosslinking agent includes benzoyl peroxide; the crosslinking agent accounts for 1 wt% of the acrylonitrile-butadiene-styrene prepolymer; the crosslinking reaction temperature is 140°C and the time is 20 min.

[0038] The preparation method of the acrylonitrile-butadiene-styrene prepolymer includes: mixing 160 parts by weight of deionized water, 50 parts by weight of polybutadiene latex and 0.15 parts by weight of benzoyl peroxide, then adding 30 parts by weight of styrene, 10 parts by weight of acrylonitrile, 0.8 parts by weight of methyl methacrylate, 0.4 parts by weight of tert-dodecyl mercaptan and 34 parts by weight of emulsifier: sodium dodecylbenzene sulfonate, and reacting at 90°C for 4 hours to obtain the acrylonitrile-butadiene-styrene prepolymer.

[0039] Comparative Example 1: The difference from Example 6 is that no coupling agent was added.

[0040] Comparative Example 2: The difference from Example 6 is that the carbon fiber was not modified.

[0041] Comparative Example 3: The difference from Example 6 is that the crosslinking reaction time is 45 min.

[0042] Comparative Example 4: The difference from Example 6 is that the filler particles are polybutylene terephthalate.

[0043] Comparative Example 5: The difference from Example 6 is that no carbon fiber was added.

[0044] Comparative Example 6: The difference from Example 3 is that the particle size of the filler particles is 600 μm.

[0045] Experiment: The polybutadiene latex used was LX111A2 polybutadiene latex from Zeon Corporation of Japan.

[0046] Using the raw material ratios and parameters in Examples 1-3 and Comparative Example 6 as standards, plastic core tubes were prepared by the preparation methods provided in Examples 4-6 and Comparative Examples 1-5. The bending modulus (MPa) of the plastic core tubes (outer diameter 6 inches, thickness 5 mm) was tested in accordance with GB / T9341-2000. The test results are shown in Table 1 and Table 2.

[0047] Table 1 Example 4 Example 5 Example 6 Example 1 1876 1863 1892 Example 2 1882 1870 1887 Example 3 1895 1893 1907 Comparative Example 6 1553 1541 1558 As can be seen from the data in Table 1, the plastic core tube prepared by the method provided by the present invention has good bending resistance.

[0048] A comparison of the results of Comparative Example 6 and Example 3 shows that the particle size of the filler particles significantly affects the bending resistance of the product.

[0049] Table 2 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Example 3 1608 1679 1733 1714 1512 As can be seen from the results of Comparative Examples 1-2 in Table 2, the bending performance of the product decreases significantly when there is no chemical bond or the chemical bond between carbon fiber and acrylonitrile-butadiene-styrene prepolymer is weakened.

[0050] As can be seen from the results of Comparative Example 3 in Table 2, the increased crosslinking time also leads to a decrease in the bending resistance of the product. The physical properties of polymers usually increase with the increase of the degree of polymerization. The reason for the performance decline in this invention may be due to the change in the porosity of the product.

[0051] As can be seen from the results of Comparative Example 4 in Table 2, the choice of filler particle type also affects the bending performance of the product.

[0052] As can be seen from the results of Comparative Example 5 in Table 2, the addition of carbon fiber can significantly improve the bending resistance of the product.

[0053] The above are merely preferred embodiments of the present invention and are not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A type of plastic coiled tube, characterized in that, include: A tubular matrix and filler particles embedded in the tubular matrix; the volume shrinkage rate of the filler particles is greater than that of the tubular matrix when cooled from the melting temperature of the tubular matrix to 5-45°C; the melting point of the filler particles is higher than that of the tubular matrix.

2. The plastic core tube according to claim 1, characterized in that, The tubular matrix comprises: acrylonitrile-butadiene-styrene copolymer; the filler particles comprise: polyetheretherketone.

3. The plastic core tube according to claim 1 or 2, characterized in that, By weight, the tubular matrix comprises 100-150 parts and the filler particles comprise 20-40 parts.

4. The plastic core tube according to claim 3, characterized in that, The tubular matrix further includes carbon fibers, which account for 8wt%-12wt% of the tubular matrix.

5. The plastic core tube according to claim 3, characterized in that, The particle size of the filler particles is 200-400 μm.

6. A method for preparing the plastic core tube according to any one of claims 1-5, characterized in that, include: S100: Acrylonitrile-butadiene-styrene prepolymer, modified carbon fiber, and coupling agent are mixed and reacted, then a crosslinking agent is added and reacted, and the product is obtained after dehydration and drying. S200, the preproduct and polyetheretherketone granules are melt-extruded to obtain a plastic core tube.

7. The preparation method according to claim 6, characterized in that, The method for preparing the modified carbon fiber includes: plasma activation treatment of carbon fiber in a vacuum environment using oxygen as the gas source to obtain modified carbon fiber; the plasma activation treatment time is 12-18 min and the power is 80-120 W.

8. The preparation method according to claim 6, characterized in that, The coupling agent includes KH 550; the coupling agent accounts for 1wt%-3wt% of the modified carbon fiber; the coupling reaction temperature is 80-120℃, and the time is 3-5h.

9. The preparation method according to claim 6, characterized in that, The crosslinking agent includes dicumyl peroxide or benzoyl peroxide; the crosslinking agent accounts for 0.5wt%-1.5wt% of the acrylonitrile-butadiene-styrene prepolymer; the crosslinking reaction temperature is 120-160℃ and the time is 15-30min.

10. The preparation method according to claim 6, characterized in that, The preparation method of the acrylonitrile-butadiene-styrene prepolymer includes: mixing 140-180 parts by weight of deionized water, 40-60 parts by weight of polybutadiene latex and 0.1-0.2 parts by weight of benzoyl peroxide, then adding 25-35 parts by weight of styrene, 8-12 parts by weight of acrylonitrile, 0.4-1.2 parts by weight of methyl methacrylate, 0.2-0.5 parts by weight of tert-dodecyl mercaptan and 2-4 parts by weight of emulsifier, and reacting at 80℃-100℃ for 3-5 hours to obtain the acrylonitrile-butadiene-styrene prepolymer.