TW202146206A - Method for manufacturing composite fibers - Google Patents

Abstract

A method for manufacturing a composite fiber, including flowing steps of: providing an inner yarn; melting and extruding a covering material to coat on the inner yarn by an extruder to form an intermediate; cooling the intermediate to form the composite fiber, wherein the inner yarn accounts for 30 to 70% of the composite fiber by weight, and the covering material accounts for 30 to 70% of the composite fiber by weight; measuring a diameter of the composite fiber; taking up the composite fiber.

Description

Composite fiber process

The present invention is related to composite fibers, in particular to a composite fiber manufacturing process.

Conventional monofilament fibers include monocomponent monofilament fibers and bicomponent monofilament fibers. Mono-component monofilament fibers are produced by directly extruding a single material from a screw extruder with a die head, and then extending them; bi-component monofilament fibers can be melted and extruded by two extruders respectively. Two dissimilar materials are combined with each other.

However, single-component monofilament fiber has the problems of poor elongation and insufficient strength because it does not have a high-strength inner yarn, so it is easy to break if the tension is too large during weaving, which is inconvenient to operate; The material properties of the inner core and the outer layer are different, so during the manufacturing process, the two are prone to shrinkage to different degrees due to heating, which leads to the delamination of the interface between the inner core and the outer layer, poor dimensional stability, and running after shaping. Yarn, yarn atomization and other problems, there are shortcomings that need to be improved.

Therefore, it is necessary to provide a novel and progressive composite fiber manufacturing process to solve the above problems.

The main purpose of the present invention is to provide a composite fiber manufacturing process, which is easy to operate and can improve yield.

In order to achieve the above object, the present invention provides a composite fiber manufacturing process, comprising the following steps: providing an inner yarn; melting a coating material with an extrusion coating device and extruding and coating the inner yarn to form an intermediate body; cooling the intermediate body to form the composite fiber, wherein the inner yarn accounts for 30 to 70% by weight of the composite fiber, and the covering material accounts for 30 to 70% by weight of the composite fiber; measure the wire diameter of the composite fiber ; Rewind the composite fiber.

The following examples only illustrate possible implementations of the present invention, but are not intended to limit the scope of protection of the present invention, and are described together first.

Please refer to FIGS. 1 to 3 , which show a preferred embodiment of the present invention. The manufacturing process of the composite fiber 1 of the present invention includes the following steps.

Step S1 : providing an inner yarn 10 . The inner yarn 10 is selected from polymer monofilament yarns comprising at least one of polyethylene terephthalate (PET), thermoplastic polyurethanes (TPU), nylon, and has good tensile strength and is not easy to Heat shrinks. The linear density of the inner yarn 10 is preferably not less than 75 denier, and the structural strength is better.

Step S2: Melting a coating material 30 with an extrusion coating device 20 and extruding and coating the inner yarn 10 to form an intermediate body. Preferably, the extrusion coating device 20 can be set to heat up in multiple stages to heat and melt the coating material 30, for example, heating at 180°C, 190°C, 200°C, and 210°C for a predetermined time in sequence, so that the temperature can be uniformly heated. And the melting efficiency is better. The covering material 30 preferably includes TPU, thermoplastic polyolefin elastomer (TPO), thermoplastic polystyrene elastomer (TPS), thermoplastic polyester elastomer (TPEE) , At least one of thermoplastic polyamide elastomers (thermoplastic polyamide elastomer, TPA) can be selected in combination according to property requirements to provide the coating material 30 with different physical properties; preferably, in the coating material 30, The weight percentage of TPU is not less than 60%, so that the composite fiber 1 has the characteristics of high elasticity, high strength, wear resistance, anti-skid and anti-yellowing. In other embodiments, in addition to TPU, other materials other than the aforementioned materials can also be added to the coating material to meet different property requirements. Preferably, in the composite fiber 1, the covering material 30 can at least partially transmit light, the light transmittance of the covering material 30 is not less than the light transmittance of the inner yarn 10, and can be matched with the inner yarn 10. Different visual effects are presented; the colors of the inner yarn 10 and the covering material 30 can be configured to be the same or different according to requirements, or both can be transparent and colorless, and the appearances can be configured in various ways.

Before melting the cladding material 30, the cladding material 30 may be additionally dried to remove excess moisture. The inner yarn 10 is preferably guided to the extrusion coating device 20 through a yarn guide hole of a creel 40, which is convenient to control its moving direction and has better stability. In detail, the extrusion coating device 20 includes a die head 21 . The die head 21 includes a yarn feeding part 211 , a yarn outputting part 212 and a dipper connected between the yarn feeding part 211 and the yarn outputting part 212 . The inner yarn 10 is introduced into the impregnation space 213 from the yarn feeding part 211, and the molten covering material 30 is introduced into the impregnation space 213 to form the intermediate body, and then the intermediate body is discharged from the outlet The yarn portion 212 leads out of this impregnated space 213 .

Step S3 : cooling the intermediate to form the composite fiber 1 . In this step, it is preferable to control the cooling temperature of a cooling device 50 to be lower than 50 degrees, which can effectively and quickly cool down, and the setting effect is better. The weight percentage of the inner yarn 10 to the composite fiber 1 is 30-70%, the weight percentage of the covering material 30 to the composite fiber 1 is 30-70%, and the ratio can be adjusted according to product requirements to meet different needs.

Step S4: Measure the wire diameter of the composite fiber 1 . In this way, the wire diameter of the composite fiber 1 can be immediately known, which is beneficial to quality control, and can also be wound in batches according to the difference of the wire diameter. In this embodiment, the wire diameter of the composite fiber 1 is measured by the wire diameter measuring device 60 and fed back to the extrusion coating device 20 , and the extrusion coating device 20 can adjust its operating parameters according to a set wire diameter, Further, the wire diameter of the composite fiber 1 can conform to the set wire diameter, and the quality stability is better. The operating parameters include at least one of the extrusion amount of the covering material 30 , the extrusion temperature and the pulling speed of the inner yarn 10 .

Step S5 : winding the composite fiber 1 . For example, a rewinding device 70 can be used to rewind the composite fiber 1, and the rewinding device 70 can adjust the rewinding speed according to the speed of the extrusion coating device 20 to extract the intermediate.

Through the aforementioned steps, the composite fiber manufacturing process of the present invention utilizes the two-stage method of re-coating the monofilament fiber, which can greatly simplify the extrusion process, improve the yield, and can control the linear density of the composite fiber more accurately. In addition, through the selection of the inner yarn and the covering material, the physical properties of the composite material can also be improved, making it easy to composite, high strength, high tension, anti-yellowing, etc., which is beneficial to subsequent weaving, dyeing and other processing operations .

1: Composite fiber 10: inner yarn 20: Extrusion coating device 21: Die head 211: Feeding part 212: Yarn out part 213: Immersion Space 30:Clad material 40: Creel 50: Cooling device 60: Wire diameter measuring device 70: Rewinding device S1~S5: Steps

FIG. 1 is a cross-sectional view of a composite fiber according to a preferred embodiment of the present invention. FIG. 2 is a structural configuration diagram of a preferred embodiment of the present invention. FIG. 3 is a block flow diagram of a preferred embodiment of the present invention.

20: Extrusion coating device

21: Die head

211: Feeding part

212: Yarn out part

213: Immersion Space

40: Creel

50: Cooling device

60: Wire diameter measuring device

70: Rewinding device

Claims (10)

A composite fiber manufacturing process, comprising the following steps: provide an inner yarn; Using an extrusion coating device to melt a coating material and extrude and coat the inner yarn to form an intermediate body; cooling the intermediate to form the composite fiber, wherein the inner yarn accounts for 30 to 70% by weight of the composite fiber, and the covering material accounts for 30 to 70% by weight of the composite fiber; Measure the wire diameter of the composite fiber; The composite fiber is wound up. The composite fiber manufacturing process as claimed in claim 1, wherein the inner yarn is selected from the group consisting of at least one of polyethylene terephthalate (PET), thermoplastic polyurethanes (TPU), and nylon. Molecular monofilament yarn. The composite fiber manufacturing process according to claim 1, wherein the coating material comprises TPU, thermoplastic polyolefin elastomer (TPO), thermoplastic polystyrene elastomer (TPS), thermoplastic polyester At least one of an elastomer (thermoplastic polyester elastomer, TPEE) and a thermoplastic polyamide elastomer (thermoplastic polyamide elastomer, TPA). The composite fiber manufacturing process according to claim 3, wherein in the coating material, the weight percentage of TPU is not less than 60%. The composite fiber manufacturing process as claimed in claim 1, wherein the extrusion coating device comprises a die head, and the die head comprises a yarn feeding part, a yarn outputting part and a connection between the yarn feeding part and the yarn outputting part The dipping space; the inner yarn is introduced into the dipping space from the yarn feeding part, and the molten covering material is introduced into the dipping space to form the intermediate body, and then the intermediate body is led out of the yarn output part. Immerse space. The composite fiber manufacturing process according to claim 1, wherein the inner yarn is guided to the extrusion coating device through a yarn guide hole of a creel. The composite fiber manufacturing process according to claim 1, wherein in the composite fiber, the covering material can at least partially transmit light, and the light transmittance of the covering material is not less than that of the inner yarn. The composite fiber manufacturing process of claim 4, wherein the inner yarn is selected from the group consisting of at least one of polyethylene terephthalate (PET), thermoplastic polyurethanes (TPU), and nylon. Molecular monofilament yarn; the linear density of the inner yarn is not less than 75 denier; the inner yarn is guided to the extrusion coating device through a yarn guide hole of a creel; the extrusion coating device includes a die head, the die head Including a yarn feeding part, a yarn outputting part and a dipping space connected between the yarn feeding part and the yarn outputting part; the inner yarn is introduced into the dipping space from the yarn feeding part, and the package that is melted is introduced The coating material is placed in the dipping space to form the intermediate body, and then the intermediate body is led out of the dipping space from the yarn outlet; the coating material is dried before the coating material is melted; the extrusion coating device is set in multiple stages heating and melting the covering material; controlling the cooling temperature to be lower than 50 degrees; in the composite fiber, the covering material can at least partially transmit light, and the light transmittance of the covering material is not less than that of the inner yarn Rate. The composite fiber manufacturing process according to any one of claims 1 to 8, wherein in the step of measuring the wire diameter, a wire diameter measuring device is used to measure the wire diameter of the composite fiber and feed it back to the extrusion coating device, The extruding and covering device can adjust its operating parameters according to a set wire diameter. The composite fiber manufacturing process as claimed in claim 9, wherein the actuating parameter includes at least one of an extrusion amount of the covering material, an extrusion temperature and a pulling speed of the inner yarn.

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