CN102995151A - Method for producing color composite polyester yarn through one step - Google Patents

Abstract

The invention discloses a method for producing colored composite polyester yarns in one step. Different positions are divided by spinning positions, synchronous spinning of pre-oriented yarns (POY) and fully drawn yarns (FDY) in different paths and blending of tows Network compounding realizes the one-step completion of the four processing links of dope coloring, spinning, drawing, and networking. The production process is short, the production efficiency is high, the energy consumption is small, the pollutant discharge is reduced, and the ecology is environmentally friendly.

Description

A method for producing colored composite polyester yarn in one step

technical field

The invention relates to a melt spinning method, in particular to a method for producing colored composite polyester yarn in one step.

Background technique

The technology of white mixed fiber composite polyester yarn is relatively mature, but it is mostly produced by two-step process, which has long process flow, low production efficiency, large energy consumption and loss, and to make colored fabrics, it is necessary to dye the fabric after weaving. Subsequent deep processing links are seriously polluted and not environmentally friendly. At present, some improvements have been made to this technology, such as the equipment and method for one-step production of chemical fiber polyester composite yarn disclosed in the patent application document CN102618983A, and the one-step process 24 head/position multi-different mixed fiber composite fiber spinning disclosed in the patent document CN202265627U Winding joint production equipment, etc. But the improvement of these existing technologies to this production, promptly described one-step method is mainly the coiling stage, and the pre-spinning step adopts two spinning boxes to produce different polyester filaments respectively, does not realize real simultaneous The one-step spinning box method has not realized the process integration of colored composite polyester filaments.

Contents of the invention

The purpose of the invention is to overcome the deficiencies of the prior art and provide a method for producing colored composite polyester yarns in one step.

To achieve the above object, the present invention takes the following technical solutions to achieve:

A method for one-step production of colored composite polyester yarn, comprising the following steps:

a. Transport the polyester chips in the chip silo to the chip dryer for drying, and then transport them to the screw extruder for heating and melting to form a melt;

b. The color masterbatch in the masterbatch silo is fully dried in the masterbatch dryer, heated and melted by the small screw injection machine, and then accurately metered by the metering pump into the polyester melt output pipe of the chip screw extruder, and the polyester melt The polyester melt is stirred and mixed by a dynamic mixer to achieve uniform dispersion dyeing of the polyester melt;

c. The dyed melt enters the spinning box, which is divided into two parts, one part of the spinning position adopts the process route of directly spinning pre-oriented yarn (referred to as POY), and the other part of the spinning position is equipped with Hot roll drafting device adopts full-drawn yarn (FDY for short) process route;

d. After the pre-oriented yarn and fully drawn yarn pass through the side blowing cooling device and are metered and sprayed with oil by the oil agent pump, they are output from the spinning tunnel and divided into two routes. In one route, the pre-oriented yarn passes through the spinning tunnel and the The godet roll enters the composite network device, and the other fully drawn yarn passes through the spinning shaft, and is initially networked through the pre-network nozzle, and is fully stretched under the action of the first drafting roller and the second drafting roller before entering the compounding network. Coilers merge with pre-oriented yarn (POY) tows;

e. Pre-oriented yarn (POY) and fully drawn yarn (FDY) are networked and composited through the networked nozzle in the composite networker to form a mixed fiber composite colored polyester filament;

f. The double-different mixed fiber composite polyester yarn enters the winding machine for coiling and forming.

Preferably, the spinning position of the pre-oriented yarn (POY) in the spinning box is provided with a spinneret with special-shaped cross-section spinneret holes.

Optionally, the spinneret holes with irregular cross-sections are one of triangular, multilobal, Y-shaped, pentagonal, hollow or H-shaped.

Preferably, the fully drawn yarn (FDY) spinning position in the spinning box is provided with a spinneret with a circular cross-section spinneret hole.

Preferably, the oiling nozzle is a spray oiling system with a metering pump.

Compared with the prior art, the present invention has the following advantages: through the division of different spinning positions, the synchronous spinning of pre-oriented yarn (POY) and fully drawn yarn (FDY) and the network compounding of tow mixed fibers, realize The four processing links of dope coloring, spinning, drawing and networking are completed in one step. The production process is short, the production efficiency is high, the energy consumption is small, the pollutant discharge is reduced, and the ecology is environmentally friendly; due to the pre-oriented yarn (POY) and The thermal shrinkage, elongation, stiffness and softness of the fully drawn yarn (FDY) polyester fiber are different. After the network compounding before winding, POY fibers with special-shaped cross-sections such as triangular and multi-lobal shapes are formed. The special structure of the double-heterogeneous "skin-core" distribution of the bundle cortex and the conventional circular cross-section FDY fiber bundle core layer, the overall colored tow has both the soft feel of POY silk and the body and strength of FDY silk. It is an ideal eco-friendly new material for the production of silk wool-like fashion clothing fabrics.

Description of drawings

Fig. 1 is a flow chart of the production process for producing colored composite polyester yarns in one step in an embodiment of the present invention.

Detailed ways

The present invention will be described in detail below in conjunction with the accompanying drawings.

One-step method as shown in Figure 1 produces the production process flowchart of colored composite polyester yarn, and concrete described method comprises the following steps:

a. The polyester chips in chip bin 1 are transported to chip dryer 2 for drying, and then transported to screw extruder 3 to be heated and melted into a melt.

The polyester used in the present invention is polyethylene terephthalate (PET for short), and the PET raw material is vibrated and screened to remove powder and particles with inconsistent particle sizes, and the sliced raw material that meets the requirements is transported to the sliced bin 1 for standby. Before melting, the slices are also sent to the dryer 2 for drying to remove moisture in the slices. The dried chips enter the screw extruder 3 for heating and melting. The single-screw extruder 3 is adopted in the embodiment of the present invention. Compared with the prior art, the equipment and process are simpler and easier to control.

b. The color masterbatch in the masterbatch silo 12 is fully dried in the masterbatch dryer 13, heated and melted by the small screw injection machine 14, and then the PET melt that enters the slicing screw extruder 3 is accurately metered and output by the metering pump 14 The pipeline, together with the PET melt, is stirred and mixed by the dynamic mixer 16 to achieve uniform dispersion dyeing of the PET melt.

The colored composite polyester yarn in the prior art is generally dyed after the composite fiber is woven, and the subsequent dyeing process is seriously polluted. However, in this embodiment, the color masterbatch is used to dye the melt before entering the spinning box 4, which has no pollution to the environment, and the coloring is uniform and stable. In a preferred embodiment, anti-ultraviolet and anti-aging agents, antistatic agents, etc. can be integrated with the coloring masterbatch according to actual needs, that is, multifunctional masterbatches, which are convenient to use and can be used to weave fabrics with diverse functions.

In actual production, the original polyester colored fiber filament production line can be transformed according to the technical scheme of the present invention, and the four processing links of dope coloring, spinning, drawing and networking can be completed in one step.

c. The dyed melt enters the spinning box 4, the spinning box is divided into two parts, one part of the spinning position adopts the process route of directly spinning pre-oriented yarn (POY), and the other part of the spinning position is equipped with Hot roll drafting device adopts fully drawn yarn (FDY) process route.

In this embodiment, part of the spinning box does not need to be modified, and the pre-oriented yarn (POY) can be obtained directly by high-speed spinning process; , high-speed traction, so as to obtain fully drawn yarn (FDY).

Special-shaped fibers with special cross-sectional shapes can be spun through spinneret holes of a certain geometry. The special-shaped fibers are developed by imitating natural structures such as silk and wool. Compared with ordinary fibers, they have better optical effects and give people "" It has the feeling of "real ones", and improves the lack of fluffing and pilling of circular cross-section fibers. It has good anti-snagging performance, and at the same time improves the bulkiness and air permeability of fibers. In this embodiment, the spinning position of the pre-oriented yarn (POY) in the spinning box is provided with a spinneret with a different-shaped cross-section spinneret hole, and the spinneret hole with a different-shaped cross-section is triangular, multi-lobal, Y-shaped, One of pentagonal, hollow or H-shaped. In the spinning box, the fully drawn yarn (FDY) spinning position is provided with a spinneret with a circular cross-section spinneret hole. Due to the differences in physical properties such as heat shrinkage, elongation, stiffness and softness of polyester filament fibers in different processes between POY and FDY, the composite polyester filaments obtained after network compounding with a composite network device have special-shaped cross-sections such as triangular and multi-lobal POY The double-heterogeneous special "skin-core" structure of fiber bundle cortex and conventional circular cross-section FDY fiber bundle core layer distributes. The overall colored tow not only has the soft feel of POY silk, but also has the body and strength of FDY silk. It is an ideal eco-environmental protection new material for the production of polyester silk wool-like fashion clothing fabrics.

d. The pre-oriented yarn (POY) and fully-drawn yarn (FDY), after passing through the side blowing cooling device 5 and the oiling nozzle 6, are output from the spinning tunnel 7 and divided into two routes. In one route, the pre-oriented yarn (POY) 18 enters the composite networker 20 through a set of drafting rollers 17 guide wires, and in the other way, the fully drawn tow (FDY) 19 passes through the pre-network nozzle 8 to enhance the bundling of the FDY tow, and then passes through the first The drafting roller 10 and the second drafting roller 9 enter the compound network device 20 after stretching.

The purpose of oiling is to increase the clustering, antistatic and smoothness of the tow to meet the requirements of stretching, crimping and post-processing. In this embodiment, the spinning oil includes lubricants, antistatic agents, clustering agents, emulsifiers and regulators, which are compounded according to actual needs, and have good thermal stability.

The oiling nozzle is a spray oiling system with a metering pump to improve the uniformity and stability of oiling and tow tension.

e. Pre-oriented yarns (POY) 18 and fully drawn yarns (FDY) 19 are networked and composited in the composite networker 20 through nozzle hot air shaping and networked to form double-different mixed fiber composite colored polyester filaments 21 .

f. The double-different mixed fiber colored composite polyester yarn enters the winding machine 23, and is driven by the friction roller 22 to wind the bobbin 11, so as to realize the winding and forming of the double-different mixed fiber colored composite polyester yarn on the winding bobbin 11.

Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention, and any person skilled in the art can use the methods disclosed above and technical content to analyze the present invention without departing from the spirit and scope of the present invention. Possible changes and modifications are made in the technical solution. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention, which do not depart from the content of the technical solution of the present invention, all belong to the technical solution of the present invention. scope of protection.

Claims (5)

1. the method for the colored composite terylene silk of One-step production is characterized in that, may further comprise the steps:

Polyester slice in the chip bunker is delivered to carries out drying in the chip dryer, be delivered to then that heating and melting becomes melt in the screw extruder;

Masterbatch in the Masterbatch feed bin is fully dry in the master batch drying machine, by behind the small screw implanter heating and melting through measuring pump accurate measurement enter the section screw extruder the polyester fondant output channel, with polyester fondant, mix the Uniform Dispersion dyeing that realizes polyester fondant through dynamic mixer;

Melt after the dyeing enters spinning manifold, and described spinning manifold is divided into two parts, and wherein a part of spinning station adopts the process route of Direct Spinning pre-oriented yarn, and another part spinning station is provided with the hot-rolling drafting system, adopts the full-drawn yarn process route;

Described pre-oriented yarn and full-drawn yarn are through lateral-blowing air cooling device and after finishing oil pump metering spray oils, output is divided into two-way from spinning shaft, pre-oriented yarn enters in the composite network device through spinning shaft and godet roller in one the tunnel, another road full-drawn yarn is through behind the spinning shaft, through the tentatively networking of pre-the nozzle of interlace, after fully stretching under the effect of the first drawing roller and the second drawing roller, enter composite network device and preorientation tow and close;

Pre-oriented yarn and full-drawn yarn carry out network combined typing by networked nozzle in the composite network device, form mixed fiber composite color polyester silk;

Described mixed fiber composite terylene thread enters and batches moulding in the up-coiler.

2. method according to claim 1 is characterized in that, the pre-oriented yarn spinning station is provided with the spinnerets of odd-shaped cross section spinneret orifice in the described spinning manifold.

3. method according to claim 2 is characterized in that, the spinneret orifice of described odd-shaped cross section is a kind of in triangle, multi-leaf-shaped, Y shape, pentagon, hollow shape or the H shape.

4. method according to claim 1 is characterized in that, the full-drawn yarn spinning station is provided with the spinnerets of circular cross-section spinneret orifice in the described spinning manifold.

5. method according to claim 1 is characterized in that, described pre-oriented yarn and full-drawn yarn oil used upper oil nozzle for the spray oil feeding system of measuring pump in spinning process.