Polyester fiber endless tow production process

Abstract

The invention discloses a polyester fiber endless tow production process which comprises the following steps: S1, pre-crystallization: putting polyester fiber slices into a crystallization device for pre-crystallization to obtain pre-crystallized polyester fiber slices; in the step S1, a boiling bed is used as a crystallization device, crystallization is carried out twice, the temperature of first-time pre-crystallization is 200-300 DEG C, the time of pre-crystallization is 20-30 min, the temperature of the boiling bed is adjusted to 180 DEG C, and the time of pre-crystallization is 10 min; according to the polyester fiber endless tow production process, in the crystallization processing process, through a secondary crystallization method, on one hand, the tensile strength of polyester fibers can be improved, on the other hand, by adding the stabilizer, the regularity of molecular chains is reduced, the melting point is lowered, butanediol is added to serve as a comonomer, and the polyester fiber endless tow is prepared. The flexibility of a molecular chain can be improved, so that the crystallization property of polyester is changed, and the effect of reducing the melting point can be achieved.

Description

Technical Field

[0001] The invention relates to the technical field of polyester fiber filament bundle processing, and in particular to a polyester fiber filament bundle production process. Background Art

[0002] Polyester fiber, commonly known as "polyester", is a synthetic fiber made by chemical polycondensation of organic dibasic acid and diol. It is a kind of polymer compound. Its invention can be traced back to the 1930s, and it is now the most important type of synthetic fiber.

[0003] Polyester fiber has many advantages. First, it has excellent wrinkle resistance and shape retention. Clothes made from it are not easy to wrinkle during wearing and can maintain their original shape. Secondly, polyester fiber has high strength and elastic recovery ability, making the woven fabric strong and durable, and can quickly recover to its original shape. In addition, polyester fiber is also resistant to wear and tear and does not stick to hair, making the fabric look neater.

[0004] In general, polyester fiber is a very practical synthetic fiber. It is widely used in fields such as textile and clothing manufacturing, bringing a lot of convenience and comfort to our daily life.

[0005] With the development of textile technology, more and more composite fabrics are being produced. Pre-spinning coloring enterprises should strengthen technology research and development to improve the tensile strength of polyester fibers. Therefore, it is urgent to design a polyester fiber filament production process to solve the above problems. Summary of the invention

[0006] The object of the present invention is to provide a polyester fiber filament bundle production process to solve the above-mentioned deficiencies in the prior art.

[0007] In order to achieve the above object, the present invention provides the following technical solutions: A polyester fiber filament bundle production process comprises the following steps: S1 pre-crystallization: putting the polyester fiber slices into a crystallization device for pre-crystallization, that is, obtaining pre-crystallized polyester fiber slices; S2 Drying treatment: the pre-crystallized polyester fiber chips obtained in step S1 and the masterbatch are blended in a ratio of 105:1 and placed in a rotary drum vacuum drying oven for drying; the drying temperature is 180-200°C, the drying time is 3-5h, and the vacuum degree is 0.3-0.5Pa; S3 melt preparation: the dried mixture in step S2 is placed together with the stabilizer and the modifier into a spinning screw extruder, and extruded at a temperature of 230-265°C and a pressure of 105-115 MPa to obtain a spinning melt; S4 spinning process: the spinning melt obtained in step S3 is placed in a filter for filtering, and then transported to a spinning box through a metering pump, the pressure in the spinning box is increased, and the spinning melt is extruded from the micropores on the spinneret in the spinning box in the form of silk threads, and the silk threads are cooled by a cooling device to obtain a preliminarily formed silk bundle; S5 stretching treatment: the initially formed filament bundle obtained in step S4 is surface treated by a jet atomizer, and then stretched by three stretching machines in sequence. The filament bundle is dried and shaped in a drying chamber to obtain a formed filament bundle; the stretching temperature is 90-95°C, the stretching multiple is 3.2-3.78; the temperature of the drying chamber is 160-185°C.

[0008] S6 crimping and collection: the formed filament bundle obtained in step S5 is crimped and collected by a mechanical crimping device.

[0009] Preferably, the crystallization device in step S1 is a fluidized bed, the number of crystallizations is 2 times, the first pre-crystallization temperature is 200-300°C, the pre-crystallization time is 20-30 minutes, and the second crystallization adjusts the temperature of the fluidized bed to 180°C, and the pre-crystallization time is 10 minutes.

[0010] Preferably, the mass ratio of the mixture, the stabilizer and the modifier in step S3 is (90-110):(15-35):(13-18).

[0011] Preferably, the stabilizer in step S3 is 6 parts of dioctyl phthalate, 6 parts of calcium stearate, 1 part of magnesium stearate, 1 part of zinc stearate, 1 part of antioxidant, 1 part of titanium dioxide, 3 parts of nano-grade ceramsite powder, 0.5 parts of antimony oxide, 0.5 parts of iron oxide, 1 part of antibacterial agent, 2 parts of graphene microsheets, 0.5 parts of sea mud, and 1 part of nano-boron carbide, and the ratio of the stabilizer to the mixture is 1:3.

[0012] Preferably, the modifier in step S3 is butanediol.

[0013] Preferably, in step S4, the temperature in the spinning box is 300-500° C., and the working pressure is 0.6-0.7 MPa.

[0014] Preferably, the cooling device in step S4 is a cooling blower, the blowing direction is perpendicular to the spinning direction, the blowing speed is 1-2.5 m / s, and the blowing temperature is 25-30°C.

[0015] Preferably, the atomizer in the spray atomizer in step S5 is a mixture of an antibacterial organic solvent and a spinning oil; the mass ratio of the antibacterial organic solvent to the spinning oil is 7:5.

[0016] Preferably, the antioxidant is a mixture of boric acid aqueous solution, citric acid, lime powder, tea alkaloids, pepper water extract, calcium hypochlorite and cyclohexanone.

[0017] In the above technical scheme, the present invention provides a polyester fiber filament bundle production process, which can not only improve the tensile strength of the polyester fiber through the secondary crystallization method during the processing and crystallization, but also add a stabilizer to reduce the regularity of the molecular chain and lower the melting point. The addition of butanediol as a comonomer can not only improve the flexibility of the molecular chain, thereby changing the crystallization properties of polyester, but also play a role in lowering the melting point. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0019] Figure 1 A schematic diagram of the process structure of a polyester fiber filament bundle production process embodiment of the present invention is provided. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0021] like Figure 1 As shown, a polyester fiber filament bundle production process provided by an embodiment of the present invention comprises the following steps: S1 pre-crystallization: putting the polyester fiber slices into a crystallization device for pre-crystallization, that is, obtaining pre-crystallized polyester fiber slices; S2 Drying treatment: the pre-crystallized polyester fiber chips obtained in step S1 and the masterbatch are blended in a ratio of 105:1 and placed in a rotary drum vacuum drying oven for drying; the drying temperature is 180-200°C, the drying time is 3-5h, and the vacuum degree is 0.3-0.5Pa; S3 melt preparation: the dried mixture in step S2 is placed together with the stabilizer and the modifier into a spinning screw extruder, and extruded at a temperature of 230-265°C and a pressure of 105-115 MPa to obtain a spinning melt; S4 spinning process: the spinning melt obtained in step S3 is placed in a filter for filtering, and then transported to a spinning box through a metering pump, the pressure in the spinning box is increased, and the spinning melt is extruded from the micropores on the spinneret in the spinning box in the form of silk threads, and the silk threads are cooled by a cooling device to obtain a preliminarily formed silk bundle; S5 stretching treatment: the initially formed filament bundle obtained in step S4 is surface treated by a jet atomizer, and then stretched by three stretching machines in sequence. The filament bundle is dried and shaped in a drying chamber to obtain a formed filament bundle; the stretching temperature is 90-95°C, the stretching multiple is 3.2-3.78; the temperature of the drying chamber is 160-185°C.

[0022] S6 crimping and collection: the formed filament bundle obtained in step S5 is crimped and collected by a mechanical crimping device.

[0023] Preferably, the crystallization device in step S1 is a fluidized bed, the number of crystallizations is 2 times, the first pre-crystallization temperature is 200-300°C, the pre-crystallization time is 20-30 minutes, and the second crystallization adjusts the temperature of the fluidized bed to 180°C, and the pre-crystallization time is 10 minutes.

[0024] Preferably, the mass ratio of the mixture, the stabilizer and the modifier in step S3 is (90-110):(15-35):(13-18).

[0025] Preferably, the stabilizer in step S3 is 6 parts of dioctyl phthalate, 6 parts of calcium stearate, 1 part of magnesium stearate, 1 part of zinc stearate, 1 part of antioxidant, 1 part of titanium dioxide, 3 parts of nano-grade ceramsite powder, 0.5 parts of antimony oxide, 0.5 parts of iron oxide, 1 part of antibacterial agent, 2 parts of graphene microsheets, 0.5 parts of sea mud, and 1 part of nano-boron carbide, and the ratio of the stabilizer to the mixture is 1:3.

[0026] Preferably, the modifier in step S3 is butanediol.

[0027] Preferably, in step S4, the temperature in the spinning box is 300-500° C., and the working pressure is 0.6-0.7 MPa.

[0028] Preferably, the cooling device in step S4 is a cooling blower, the blowing direction is perpendicular to the spinning direction, the blowing speed is 1-2.5 m / s, and the blowing temperature is 25-30°C.

[0029] Preferably, the atomizer in the spray atomizer in step S5 is a mixture of an antibacterial organic solvent and a spinning oil; the mass ratio of the antibacterial organic solvent to the spinning oil is 7:5.

[0030] Preferably, the antioxidant is a mixture of boric acid aqueous solution, citric acid, lime powder, tea alkaloids, pepper water extract, calcium hypochlorite and cyclohexanone. Example

[0031] A polyester fiber filament bundle production process comprises the following steps: S1 pre-crystallization: putting the polyester fiber slices into a crystallization device for pre-crystallization, that is, obtaining pre-crystallized polyester fiber slices; S2 Drying treatment: The pre-crystallized polyester fiber chips obtained in step S1 and the masterbatch are blended in a ratio of 105:1 and placed in a rotary drum vacuum drying oven for drying; the drying temperature is 180°C, the drying time is 3-5h, and the vacuum degree is 0.3-0.5Pa; S3 melt preparation: the dried mixture in step S2 is placed together with the stabilizer and the modifier into a spinning screw extruder, and extruded at a temperature of 230° C. and a pressure of 105 MPa to obtain a spinning melt; S4 spinning process: the spinning melt obtained in step S3 is placed in a filter for filtering, and then transported to a spinning box through a metering pump, the pressure in the spinning box is increased, and the spinning melt is extruded from the micropores on the spinneret in the spinning box in the form of silk threads, and the silk threads are cooled by a cooling device to obtain a preliminarily formed silk bundle; S5 stretching treatment: The initially formed filament bundle obtained in step S4 is surface treated by a jet atomizer, and then stretched by three stretching machines in sequence. The filament bundle is dried and shaped in a drying chamber to obtain a formed filament bundle; the stretching temperature is 90°C, the stretching multiple is 3.2; the temperature of the drying chamber is 160°C.

[0032] S6 crimping and collection: the formed filament bundle obtained in step S5 is crimped and collected by a mechanical crimping device.

[0033] Preferably, the crystallization device in step S1 is a fluidized bed, the number of crystallizations is 2 times, the first pre-crystallization temperature is 200°C, the pre-crystallization time is 20 minutes, and the second crystallization adjusts the temperature of the fluidized bed to 180°C, and the pre-crystallization time is 10 minutes.

[0034] Preferably, in step S4, the temperature in the spinning box is 300° C. and the working pressure is 0.6 MPa.

[0035] Preferably, the cooling device in step S4 is a cooling blower, the blowing direction is perpendicular to the spinning direction, the blowing speed is 1-2.5 m / s, and the blowing temperature is 25-30°C. Example

[0036] A polyester fiber filament bundle production process comprises the following steps: S1 pre-crystallization: putting the polyester fiber slices into a crystallization device for pre-crystallization, that is, obtaining pre-crystallized polyester fiber slices; S2 Drying treatment: The pre-crystallized polyester fiber chips obtained in step S1 and the masterbatch are blended in a ratio of 105:1 and placed in a rotary drum vacuum drying oven for drying; the drying temperature is 190°C, the drying time is 4 hours, and the vacuum degree is 0.4 Pa; S3 melt preparation: the dried mixture in step S2 is placed together with the stabilizer and the modifier into a spinning screw extruder, and extruded at a temperature of 240° C. and a pressure of 108 MPa to obtain a spinning melt; S4 spinning process: the spinning melt obtained in step S3 is placed in a filter for filtering, and then transported to a spinning box through a metering pump, the pressure in the spinning box is increased, and the spinning melt is extruded from the micropores on the spinneret in the spinning box in the form of silk threads, and the silk threads are cooled by a cooling device to obtain a preliminarily formed silk bundle; S5 stretching treatment: The initially formed filament bundle obtained in step S4 is surface treated by a jet atomizer, and then stretched by three stretching machines in sequence. The filament bundle is dried and shaped in a drying chamber to obtain a formed filament bundle; the stretching temperature is 91°C, the stretching multiple is 3.3; the temperature of the drying chamber is 170°C.

[0037] S6 crimping and collection: the formed filament bundle obtained in step S5 is crimped and collected by a mechanical crimping device.

[0038] Preferably, the crystallization device in step S1 is a fluidized bed, the number of crystallizations is 2 times, the first pre-crystallization temperature is 240°C, the pre-crystallization time is 25 minutes, and the second crystallization adjusts the temperature of the fluidized bed to 180°C, and the pre-crystallization time is 10 minutes.

[0039] Preferably, in step S4, the temperature in the spinning box is 350° C. and the working pressure is 0.63 MPa.

[0040] Preferably, the cooling device in step S4 is a cooling blower, the blowing direction is perpendicular to the spinning direction, the blowing speed is 1-2.5 m / s, and the blowing temperature is 25-30°C. Example

[0041] A polyester fiber filament bundle production process comprises the following steps: S1 pre-crystallization: putting the polyester fiber slices into a crystallization device for pre-crystallization, that is, obtaining pre-crystallized polyester fiber slices; S2 Drying treatment: The pre-crystallized polyester fiber chips obtained in step S1 and the masterbatch are blended in a ratio of 105:1 and placed in a rotary drum vacuum drying oven for drying; the drying temperature is 200°C, the drying time is 5 hours, and the vacuum degree is 0.5 Pa; S3 melt preparation: the dried mixture in step S2 is placed together with the stabilizer and the modifier into a spinning screw extruder, and extruded at a temperature of 265° C. and a pressure of 115 MPa to obtain a spinning melt; S4 spinning process: the spinning melt obtained in step S3 is placed in a filter for filtering, and then transported to a spinning box through a metering pump, the pressure in the spinning box is increased, and the spinning melt is extruded from the micropores on the spinneret in the spinning box in the form of silk threads, and the silk threads are cooled by a cooling device to obtain a preliminarily formed silk bundle; S5 stretching treatment: The initially formed filament bundle obtained in step S4 is surface treated by a jet atomizer, and then stretched by three stretching machines in sequence. The filament bundle is dried and shaped in a drying chamber to obtain a formed filament bundle; the stretching temperature is 95°C, the stretching multiple is 3.78; the temperature of the drying chamber is 185°C.

[0042] S6 crimping and collection: the formed filament bundle obtained in step S5 is crimped and collected by a mechanical crimping device.

[0043] Preferably, the crystallization device in step S1 is a fluidized bed, the number of crystallizations is 2, the first pre-crystallization temperature is 300°C, the pre-crystallization time is 30 minutes, and the second crystallization adjusts the temperature of the fluidized bed to 180°C, and the pre-crystallization time is 10 minutes.

[0044] Preferably, in step S4, the temperature in the spinning box is 500° C. and the working pressure is 0.6-0.7 MPa.

[0045] Preferably, the cooling device in step S4 is a cooling blower, the blowing direction is perpendicular to the spinning direction, the blowing speed is 1-2.5 m / s, and the blowing temperature is 25-30°C. The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A polyester fiber filament bundle production process, characterized in that: The following steps are involved: S1 pre-crystallization: putting the polyester fiber slices into a crystallization device for pre-crystallization, that is, obtaining pre-crystallized polyester fiber slices; S2 Drying: The pre-crystallized polyester fiber chips obtained in step S1 and the masterbatch are blended in a ratio of 105:1 and placed in a rotary drum vacuum drying oven for drying; the drying temperature is 180-200°C, the drying time is 3-5h, and the vacuum degree is 0.3-0.5Pa; S3 melt preparation: the dried mixture in step S2 is placed together with the stabilizer and the modifier into a spinning screw extruder, and extruded at a temperature of 230-265°C and a pressure of 105-115 MPa to obtain a spinning melt; S4 spinning: the spinning melt obtained in step S3 is put into a filter for filtering, and then transported to a spinning box through a metering pump, the pressure in the spinning box is increased, and the spinning melt is extruded from the micropores on the spinneret in the spinning box in the form of silk threads, and the silk threads are cooled by a cooling device to obtain a preliminarily formed silk bundle; S5 stretching: The initially formed filament bundle obtained in step S4 is surface treated by a jet atomizer, and then stretched by three stretching machines in sequence. The filament bundle is dried and shaped in a drying chamber to obtain a formed filament bundle; the stretching temperature is 90-95°C, the stretching multiple is 3.2-3.78; the temperature of the drying chamber is 160-185°C.

2. S6 crimping: The formed filament bundle obtained in step S5 is crimped and collected by a mechanical crimping device.

3. The polyester fiber filament bundle production process according to claim 1, characterized in that: The crystallization device in step S1 is a fluidized bed, the crystallization times are 2 times, the first pre-crystallization temperature is 200-300°C, the pre-crystallization time is 20-30 minutes, and the second crystallization adjusts the temperature of the fluidized bed to 180°C, the pre-crystallization time is 10 minutes.

4. The polyester fiber filament bundle production process according to claim 1, characterized in that: The mass ratio of the mixture, the stabilizer and the modifier in step S3 is (90-110):(15-35):(13-18).

5. A polyester fiber filament bundle production process according to claim 1 or 3, characterized in that: The stabilizer in step S3 is 6 parts of dioctyl phthalate, 6 parts of calcium stearate, 1 part of magnesium stearate, 1 part of zinc stearate, 1 part of antioxidant, 1 part of titanium dioxide, 3 parts of nano-grade ceramsite powder, 0.5 parts of antimony oxide, 0.5 parts of iron oxide, 1 part of antibacterial agent, 2 parts of graphene microsheets, 0.5 parts of sea mud, and 1 part of nano-boron carbide, and the ratio of the stabilizer to the mixture is 1:

3.

6. The process for producing polyester fiber filament bundles according to claim 1, characterized in that: The modifier in step S3 is butanediol.

7. The process for producing polyester fiber filament bundles according to claim 1, characterized in that: In step S4, the temperature in the spinning box is 300-500° C., and the working pressure is 0.6-0.7 MPa.

8. The process for producing polyester fiber filament bundles according to claim 1, characterized in that: The cooling device in step S4 is a cooling blower, the blowing direction is perpendicular to the spinning direction, the blowing speed is 1-2.5 m / s, and the blowing temperature is 25-30°C.

9. The process for producing polyester fiber filament bundles according to claim 1, characterized in that: In the step S5, the atomizer in the spray atomizer is a mixture of an antibacterial organic solvent and a spinning oil; the mass ratio of the antibacterial organic solvent to the spinning oil is 7:

5.

10. The process for producing polyester fiber filament bundles according to claim 4, characterized in that: The antioxidant is a mixture of boric acid aqueous solution, citric acid, lime powder, tea alkaloids, pepper water extract, calcium hypochlorite and cyclohexanone.

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