Application of novel bio-based plastic polymer in preparation of TSP fibers
Bio-based plastic TSP fibers were prepared by using bamboo powder to modify polypropylene terephthalate resin, which solved the problems of adhesion and dyeing in the processing of plastic fibers, improved the physical properties and dyeing effect of the fibers, and realized lightweight and high-performance fiber manufacturing.
Patent Information
- Application Number
- CN202511050799.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-29
- Publication Date
- 2025-11-11
AI Technical Summary
Plastic fibers are prone to sticking and tangling during processing. Their low moisture absorption makes dyeing difficult, and they also have serious problems with softness and static electricity. Conventional dyes have difficulty penetrating them, resulting in many color variations and insufficient resilience.
A novel polymer, poly(propylene terephthalate) resin containing bamboo powder, is used to prepare bio-based plastic TSP fibers through melt spinning. The reinforcing effect of bamboo powder is combined to improve the physical properties of the fibers.
A lightweight, antistatic, flexible, wear-resistant, and low-friction bio-based plastic TSP fiber was prepared. It has good colorfastness, high heat distortion temperature, and excellent mechanical properties.
Smart Images
Figure CN120923983A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of plastic fiber preparation technology, specifically relating to the application of a novel bio-based plastic polymer in the preparation of TSP fibers. Background Technology
[0002] The main technical challenges of plastic fibers lie in their physical properties (hygroscopicity, static electricity, and dyeability) and processing adaptability. Their smooth surface and high coefficient of friction make them prone to sticking and entanglement with equipment during processes such as opening, carding, and drawing. The lack of hydrophilic groups results in low hygroscopicity (moisture regain of only 0.4%–0.5%), making dyeing difficult. Conventional water-based dyes have difficulty penetrating them, requiring high-temperature, high-pressure disperse dyeing (120–130℃), which also easily leads to color variations, poor softness, insufficient resilience, and static electricity. Summary of the Invention
[0003] The purpose of this invention is to provide a novel bio-based plastic polymer, which is a new polymer made from polypropylene terephthalate resin containing bamboo powder. This novel bio-based plastic polymer can be used to manufacture bio-based TSP fibers. These TSP fibers offer solutions to problems such as lightweight, high impact strength, antistatic properties, high elasticity, flexibility, abrasion resistance, low coefficient of friction, and colorfastness. Not only can lightweight bio-based TSP fibers be manufactured, but they also possess advantages such as low coefficient of friction, easy coloring, color curing, abrasion resistance, wrinkle resistance, and antistatic properties.
[0004] This invention is achieved through the following technical solution:
[0005] The application of a novel bio-based plastic polymer in the preparation of TSP fibers, wherein the novel bio-based plastic polymer is composed of 30-35% bamboo powder and 65-70% poly(propylene terephthalate) resin by mass fraction.
[0006] A novel bio-based plastic TSP fiber is prepared by melt spinning of the aforementioned novel bio-based plastic polymer.
[0007] Poly(propylene terephthalate) resin (BTPP) is a polymer formed by the polycondensation reaction of terephthalic acid (PTA) and 1,3-propanediol (PDO). Its molecular structure contains numerous ester bonds, benzene rings, and methylene groups. It combines the softness of nylon, the bulkiness of acrylic fiber, and the stain resistance of polyester, while also exhibiting good resilience, tensile recovery, softness, and antistatic properties. The melt index (MI, g / 10min, (ASTM D 1238, 230℃, 2.16kg)) of BTPP resin is 10–20 g / 10min, more preferably 5–60 g / 10min. If the melt index is less than 0.5 / 10min, the melt viscosity increases after mixing with 30%–35% bamboo, leading to reduced processability. If the melt index exceeds 80 g / 10min, the impact performance of molded articles made using this polymer decreases. Therefore, the above range is preferable. Furthermore, polypropylene terephthalate (PPT) has a specific gravity index of less than 1.32 g and a melting point exceeding 230°C. Due to the branching properties of PPT, it can exhibit further improved melt strength. Ideally, the specific gravity should be less than 1.32, and more likely less than 1.0. When the PPT resin content is less than 50%, the resin polymer becomes cloudy and its mechanical properties decrease. When the PPT resin content exceeds 60%, the 30-35% bamboo powder content is relatively reduced, leading to a decrease in the mechanical properties of the resin polymer. Since the desired values may not be achieved, the above range is acceptable. PPT resin requires drying. Drying can be carried out at 120°C for 3-4 hours.
[0008] A method for preparing a novel bio-based plastic TSP fiber includes the following steps:
[0009] S1. Preparation of bamboo powder:
[0010] Bamboo is selected, and after removing the leaves and stems, it is initially dried, crushed, and then dried a second time to obtain bamboo powder.
[0011] S2. Select bamboo powder and dried polypropylene terephthalate resin, mix them and put them into an extrusion device, heat them to prepare granules, and then dry the granules to obtain the polymer.
[0012] S3. The polymer is heated to a molten state and conveyed to a spinneret through a screw extruder. Under pressure, it is extruded from the spinneret to form a molten stream. It is then cooled and solidified in air or water, and finally drawn into filaments to obtain the novel bio-based plastic TSP fiber.
[0013] Preferably, in step S1, the bamboo powder has a particle size of 1000-15000 mesh and a specific gravity index of less than 0.35g.
[0014] Preferably, the initial drying temperature is 35-45°C, the duration is 3-7 days, and the material is pulverized to 1000-15000 mesh.
[0015] The secondary drying temperature is 70-80℃, and the duration is 1-3 hours.
[0016] Bamboo is in powder form with a particle size of 1000-15000 mesh and a specific gravity of less than 0.35 g / g. When the particle size of the bamboo powder is below 1000 mesh, the reinforcing effect of TSP fibers does not meet expectations. When the particle size of the bamboo powder exceeds 1500 mesh, due to the fine particle size, powder loss occurs when it is compounded with polypropylene terephthalate resin, resulting in a decrease in physical properties. Therefore, the above range is preferred. The bamboo powder includes the steps of preparing bamboo and removing leaves and stems; pre-drying the leaf- and stem-removed bamboo at a temperature of 35-45°C for 3-7 days and then pulverizing it; further drying the pulverized bamboo at a temperature of 70-80°C for 1-3 hours; and may include the step of sterilizing the secondary-dried bamboo using an ultraviolet sterilizer. The step of removing leaves and stems from the bamboo is to use the bamboo stems. This is because bamboo trunks are easy to process, containing a large amount of bactericidal components such as silica, trienes, and tannins. The bamboo, after removing leaves and stems, is initially dried and pulverized at 35-45℃ for 3-7 days to facilitate pulverization. During the initial drying, temperatures below 35℃ result in poor drying effects and prolonged drying time, while temperatures above 45℃ lead to rapid drying that only achieves surface drying; therefore, the above range is preferable. Pulverization can be performed using a pulverizer, with no limit on the number of times, until the bamboo powder particle size is pulverized to 1000-15000 mesh. The pulverized bamboo is then subjected to a secondary drying at 70-80℃ for 1-3 hours to reduce the defect rate of the final product. If the moisture content of the crushed bamboo is above 15%, the high moisture content will increase the defect rate when manufacturing the finished product. The secondary drying is carried out at a low temperature for a short time to prevent bamboo oxidation. The step of sterilizing the bamboo powder after the secondary drying using an ultraviolet sterilizer is to remove microorganisms or mold from the bamboo. At this point, the wavelength of the ultraviolet sterilizer can be set at a wavelength that can effectively remove microorganisms or mold.
[0017] Preferably, the poly(propylene terephthalate) resin is obtained by drying at 100–120°C for 3–4 hours.
[0018] Preferably, the specific gravity of the poly(propylene terephthalate) resin is not higher than 1.0.
[0019] Preferably, in step S2, the material is heated to 230–250°C to prepare particles; and then dried at 100–120°C to obtain a polymer.
[0020] When the temperature of the extruder is below 200°C, there is a problem that polypropylene terephthalate cannot be fully melted. When the temperature exceeds 290°C, the processability of the pellets is reduced, and there is a problem that the polymer oxidizes and carbonizes in the extruder. Therefore, the above range is preferred.
[0021] Preferably, in step S3, the polymer is heated to 170-210°C for melt treatment and then fed to a spinneret through an extruder with a screw extrusion pressure of 5-20 MPa.
[0022] Compared with the prior art, the present invention has at least the following technical effects:
[0023] This invention provides a novel bio-based plastic polymer, which is a new polymer made from polypropylene terephthalate resin containing bamboo powder. This novel bio-based plastic polymer can be used to produce bio-based TSP fibers. These TSP fibers offer solutions to problems such as lightweight, high impact strength, antistatic properties, high elasticity, flexibility, abrasion resistance, low coefficient of friction, and colorfastness. Not only can lightweight bio-based TSP fibers be manufactured, but they also possess advantages such as low coefficient of friction, easy coloring, color curing, abrasion resistance, wrinkle resistance, and antistatic properties. They have a heat distortion temperature of 200℃, a melting point of 230℃, a glass transition temperature of 50-55℃, and good colorfastness. Attached Figure Description
[0024] Figure 1 The fiber product prepared in Example 1. Detailed Implementation
[0025] The embodiments of the present invention will be described in detail below with reference to the examples. However, those skilled in the art will understand that the following examples are only for illustrating the present invention and should not be regarded as limiting the scope of the present invention. Specific conditions not specified in the examples shall be carried out according to conventional conditions or conditions recommended by the manufacturer. Reagents or instruments whose manufacturers are not specified are all conventional products that can be purchased commercially.
[0026] Example 1: Application of a novel bio-based plastic polymer in the preparation of TSP fibers, wherein the novel bio-based plastic polymer is composed of 30% bamboo powder and 70% poly(propylene terephthalate) resin by mass.
[0027] A novel bio-based plastic TSP fiber is prepared by melt spinning of the aforementioned novel bio-based plastic polymer.
[0028] A method for preparing a novel bio-based plastic TSP fiber includes the following steps:
[0029] S1. Preparation of bamboo powder:
[0030] Bamboo is selected, and after removing the leaves and stems, it is initially dried, crushed, and then dried a second time to obtain bamboo powder.
[0031] S2. Select bamboo powder and dried polypropylene terephthalate resin, mix them and put them into an extrusion device, heat them to prepare granules, and then dry the granules to obtain the polymer.
[0032] S3. The polymer is heated to a molten state and conveyed to a spinneret through a screw extruder. Under pressure, it is extruded from the spinneret to form a molten stream. It is then cooled and solidified in air or water, and finally drawn into filaments to obtain the novel bio-based plastic TSP fiber.
[0033] In S1, the bamboo powder has a particle size of 1000 mesh and a specific gravity index of less than 0.35g.
[0034] The initial drying temperature is 35°C, the duration is 3 days, and the material is pulverized to 1000 mesh.
[0035] The secondary drying temperature is 70℃ and the duration is 1 hour.
[0036] The poly(propylene terephthalate) resin was obtained by drying at 100°C for 3 hours.
[0037] The specific gravity of the poly(propylene terephthalate) resin is not higher than 1.0.
[0038] In step S2, the material is heated to 230°C to prepare particles; after drying at 100°C, a polymer is obtained.
[0039] In step S3, the polymer is heated to 170°C for melt treatment and then fed to the spinneret through an extruder with a screw extrusion pressure of 10 MPa.
[0040] like Figure 1 The image shows the fiber product prepared in the example.
[0041] Example 2:
[0042] Application of a novel bio-based plastic polymer in the preparation of TSP fibers, wherein the novel bio-based plastic polymer is composed of 35% bamboo powder and 65% poly(propylene terephthalate) resin by mass fraction.
[0043] A novel bio-based plastic TSP fiber is prepared by melt spinning of the aforementioned novel bio-based plastic polymer.
[0044] A method for preparing a novel bio-based plastic TSP fiber includes the following steps:
[0045] S1. Preparation of bamboo powder:
[0046] Bamboo is selected, and after removing the leaves and stems, it is initially dried, crushed, and then dried a second time to obtain bamboo powder.
[0047] S2. Select bamboo powder and dried polypropylene terephthalate resin, mix them and put them into an extrusion device, heat them to prepare granules, and then dry the granules to obtain the polymer.
[0048] S3. The polymer is heated to a molten state and conveyed to a spinneret through a screw extruder. Under pressure, it is extruded from the spinneret to form a molten stream. It is then cooled and solidified in air or water, and finally drawn into filaments to obtain the novel bio-based plastic TSP fiber.
[0049] In S1, the bamboo powder has a particle size of 15,000 mesh and a specific gravity index of less than 0.35g.
[0050] The initial drying temperature is 45℃, the duration is 7 days, and the material is pulverized to 15,000 mesh.
[0051] The secondary drying temperature is 80℃ and the duration is 3 hours.
[0052] The poly(propylene terephthalate) resin was obtained by drying at 120°C for 4 hours.
[0053] The specific gravity of the poly(propylene terephthalate) resin is not higher than 1.0.
[0054] In step S2, the material is heated to 250°C to prepare particles; after drying at 120°C, a polymer is obtained.
[0055] In step S3, the polymer is heated to 210°C for melt treatment and then fed to the spinneret through an extruder with a screw extrusion pressure of 10 MPa.
[0056] Comparative Example 1:
[0057] According to ASTM D1238, disposable spoons were manufactured using polypropylene terephthalate resin with an MI of 20 and measured for 10 minutes at a temperature of 230°C and a load of 2.16 kg.
[0058] Comparative Example 2:
[0059] According to ASTM D1238, disposable helmets made of polypropylene terephthalate resin with an MI of 10 were measured for 10 minutes at a temperature of 230°C and a load of 2.16 kg.
[0060] Experimental verification results:
[0061] Examples 1 and 2, as well as Comparative Examples 1 and 2, were selected above, and granules with a size of approximately Φ5 mm were manufactured using a granulator. To test the performance of molded products made from these granules, disposable spoons and helmets were manufactured, respectively.
[0062] Verification 1: Input vs. Output Comparison
[0063] The ratio of the output of spoons and helmets manufactured using Example 1 to the output of disposable molded articles manufactured using the input of polypropylene terephthalate resins of Comparative Examples 1 and 2 was measured.
[0064] project Input amount (kg) Number of molds manufactured Example 1 (Spoon) 500 119000 Example 1 (Helmet) 500 1450 Comparative Example 1 (Spoon) 500 80000 Comparative Example 2 (Helmet) 500 1000
[0065] As can be seen from the table above, when disposable spoons and helmets are manufactured using equal weights of resin polymers, a greater quantity of disposable spoons and helmets can be manufactured when the novel polymer of Example 1 is used.
[0066] Verification 2: Mechanical and physical properties
[0067] The physical properties of the helmets manufactured according to Embodiment 1 and Comparative Example 2 of the present invention were tested, as shown in the table below.
[0068]
[0069] According to the results in the table above, in the case of Example 1 of the present invention containing 30-35% bamboo, compared with conventional plastics, the specific Example 1 of the present invention, which describes the polypropylene terephthalate resin polymer containing 30-35% bamboo and the molded articles obtained therefrom, has achieved improved mechanical and physical properties.
[0070] The technical solution of this application significantly improves the mechanical and physical properties of cantilever beams, such as notched impact strength, tensile strength, and elongation at break, thereby effectively improving the performance of the product.
[0071] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. 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. The application of a novel bio-based plastic polymer in the preparation of TSP fibers, characterized in that, The novel bio-based plastic polymer is composed of 30-35% bamboo powder and 65-70% poly(propylene terephthalate) resin by mass.
2. A novel bio-based plastic TSP fiber, characterized in that, It is prepared by melt spinning from the novel bio-based plastic polymer as described in claim 1.
3. A method for preparing the novel bio-based plastic TSP fiber as described in claim 2, characterized in that, Includes the following steps: S1. Preparation of bamboo powder: Bamboo is selected, and after removing the leaves and stems, it is initially dried, crushed, and then dried a second time to obtain bamboo powder. S2. Select bamboo powder and dried polypropylene terephthalate resin, mix them and put them into an extrusion device, heat them to prepare granules, and then dry the granules to obtain the polymer. S3. The polymer is heated to a molten state and conveyed to a spinneret through a screw extruder. Under pressure, it is extruded from the spinneret to form a molten stream. It is then cooled and solidified in air or water, and finally drawn into filaments to obtain the novel bio-based plastic TSP fiber.
4. The method for preparing a novel bio-based plastic TSP fiber according to claim 3, characterized in that, In S1, the bamboo powder has a particle size of 1000-15000 mesh and a specific gravity index of less than 0.35g.
5. The method for preparing a novel bio-based plastic TSP fiber according to claim 4, characterized in that, The initial drying temperature is 35-45℃, the duration is 3-7 days, and the material is pulverized to 1000-15000 mesh. The secondary drying temperature is 70-80℃, and the duration is 1-3 hours.
6. The method for preparing a novel bio-based plastic TSP fiber according to claim 3, characterized in that, The poly(propylene terephthalate) resin was obtained by drying at 100–120°C for 3–4 hours.
7. The method for preparing a novel bio-based plastic TSP fiber according to claim 6, characterized in that, The specific gravity of the poly(propylene terephthalate) resin is not higher than 1.
0.
8. The method for preparing a novel bio-based plastic TSP fiber according to claim 3, characterized in that, In step S2, particles are prepared by heating to 230–250°C and then dried at 100–120°C to obtain a polymer.
9. The method for preparing a novel bio-based plastic TSP fiber according to claim 3, characterized in that, In step S3, the polymer is heated to 170-210°C for melt treatment and then fed to a spinneret through an extruder with a screw extrusion pressure of 5-20 MPa.