Super-soft matte cotton-like polyester fiber preparation device

Abstract

The utility model discloses a super-soft matte cotton-like polyester fiber preparation device. The super-soft matte cotton-like polyester fiber preparation device comprises a spinning box body, an air bellow, an oil nozzle, a yarn guide, a yarn separator, a pre-interlacing device, a first guide disc, a second guide disc and a winding machine which are sequentially arranged from bottom to top. Wherein a plurality of uniformly arranged air ducts are arranged in the air box; and a normal-pressure pipeline and a high-pressure pipeline are arranged on the pre-interlacer and are connected in parallel. The spinning cake has the beneficial effects that (1) stumbling silk and cobweb silk cannot appear on the bottom layer of the spinning cake; 2) the delustering agent is uniformly dispersed in the polyester filament yarn, and the product shows that the breaking strength, the elongation at break, the thermal stress, the evenness unevenness and other physical index CV values can meet the requirements in the performance;

Description

Technical Field

[0001] This utility model relates to the field of polyester fiber preparation technology, and in particular to an apparatus for preparing ultra-soft matte cotton-like polyester fiber. Background Technology

[0002] Polyester filament, as the world's largest-produced and most widely used synthetic chemical fiber, has been in a state of overcapacity and supply exceeding demand for the past decade. Product homogenization is severe, and market competition is fierce. Developing differentiated, high-value-added products has become an important research direction for chemical fiber manufacturers seeking transformation, upgrading, and breakthroughs. Super-soft matte cotton-like polyester fiber is a highly representative example of differentiated polyester fiber, perfectly aligning with the current market demand for high-value-added products. Super-soft matte cotton-like polyester fiber is mainly used in clothing, home furnishings, and decorative fabrics, offering significant advantages in comfort and hand feel compared to conventional polyester fibers.

[0003] However, existing technologies have the following technical problems in the preparation process:

[0004] 1) The bottom layer of the silk cake will have strands of silk or cobweb-like silk.

[0005] 2) The uneven dispersion of the matting agent in the polyester filament ultimately results in the product exhibiting high CV values ​​in physical properties such as breaking strength, elongation at break, thermal stress, and yarn unevenness, which fail to meet the requirements. Utility Model Content

[0006] The purpose of this invention is to address the shortcomings of existing technologies by proposing a device for preparing ultra-soft matte cotton-like polyester fibers.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] An apparatus for preparing ultra-soft matte imitation cotton polyester fiber, comprising, from bottom to top: a spinning box, a wind box, an oil nozzle, a yarn guide, a yarn separator, a pre-networker, a guide plate one, a guide plate two, and a winding machine.

[0009] The bellows contains several evenly spaced air ducts.

[0010] The pre-networker is equipped with atmospheric pressure pipelines and high pressure pipelines, which are connected in parallel.

[0011] As a further preferred option, a control valve is provided on the high-pressure pipeline.

[0012] As a further preferred embodiment, the control valve is equipped with a timing controller.

[0013] As a further preferred embodiment, the spinning box is connected to the polymerization reaction apparatus.

[0014] As a further preferred embodiment, the polymerization reactor includes a mixing tank, an esterification reactor, a prepolymerization reactor, and a final polymerization reactor arranged in sequence, and the mixing tank, esterification reactor, prepolymerization reactor, and final polymerization reactor are all connected by pipelines.

[0015] As a further preferred option, a booster pump is installed on the pipeline connecting the final polymerization reactor and the spinning box.

[0016] As a further preferred option, the pipeline connecting the esterification reactor and the prepolymerization reactor is provided with injection pipeline one and injection pipeline two arranged in parallel.

[0017] This utility model has the following beneficial effects:

[0018] 1) Compared with the existing technology, this ultra-soft matte imitation cotton polyester fiber preparation device adds a high-pressure pipeline to the winding pre-networker to increase the network pressure of the yarn cake within 20 minutes, and uses a timing switching device to automatically switch to the normal pressure pipeline at timed intervals, thereby improving the "oil uniformity" effect, enhancing the cohesion between monofilaments, and thus improving the cohesion and bundle properties between the bottom monofilaments within 20 minutes, effectively improving the problems of strand tangling and spider web-like strands at the bottom of the yarn cake;

[0019] 2) Compared with the existing technology, the ultra-soft matte imitation cotton polyester fiber preparation device achieves the preparation of fully matte polyester melt by adding the required suspension in the stage of polymerizing polyester oligomers, and then directly produces fully matte polyester filament by melt direct spinning. Compared with the original method of adding fully matte masterbatch online in the final stage of polyester melt polymerization, which requires drying, crystallization, melting and blending of fully matte masterbatch, the improved process is simpler, requires less equipment, has lower manufacturing cost, and is easier to scale up.

[0020] 3) Compared with existing technologies, by adding the required suspension in the stage of polymerizing polyester oligomers, the dispersion of the matting agent in the polyester filament is made more uniform. As a result, the physical property indicators such as breaking strength, breaking elongation, thermal stress, and evenness of the product produced by this ultra-soft matte cotton-like polyester fiber preparation device are significantly lower than those of the product produced by the traditional online injection method of masterbatch. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the device for preparing ultra-soft matte cotton-like polyester fibers proposed in this utility model.

[0022] Figure 2 This is a schematic diagram of the polymerization reaction apparatus proposed in this utility model;

[0023] Figure 3This is a schematic diagram of the improved pre-networker structure proposed in this utility model; Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Reference Figures 1-3 As shown,

[0026] This utility model provides an apparatus for preparing ultra-soft matte cotton-like polyester fibers, such as... Figure 1 and 2 As shown, the ultra-soft matte imitation cotton polyester fiber preparation device includes, from bottom to top, the following components arranged in sequence: spinning box 1, air box 2, oil nozzle 3, yarn guide 4, yarn separator 5, pre-networker 6, guide plate 1 71, guide plate 2 72, and winding machine 8; wherein, the air box 2 is provided with several evenly arranged air ducts 21; the pre-networker 6 is provided with an atmospheric pressure pipeline 61 and a high pressure pipeline 62, which are connected in parallel; the high pressure pipeline 62 is provided with a control valve 621, and the control valve 621 is provided with a timing controller 622.

[0027] To achieve the purpose of this utility model, the difference from the prior art is that the pre-networker 6 is connected to a parallel atmospheric pressure pipeline 61 and a high pressure pipeline 62 via a tee. By adding the high pressure pipeline 62 as an enhanced air pressure, the enhanced air pressure is activated within 20 minutes after the winding machine 8 starts controlling the winding of the filaments, thereby improving the "oil uniformity" effect and enhancing the cohesion between the filaments. After 20 minutes of winding, the air intake of the pre-networker is switched from the high pressure pipeline 62 to the atmospheric pressure pipeline 61 via a timing switching device (timing controller 622 and control valve 621).

[0028] Through the above improvements, the cohesion and bundle properties between the bottom monofilaments were enhanced within 20 minutes, and the problems of strand tangling and spider web-like strands at the bottom of the silk cake were effectively reduced.

[0029] Furthermore, by Figure 3 It is known that the spinning box 1 is connected to the polymerization reaction device 90. The polymerization reaction device 90 includes a mixing tank 91, an esterification kettle 92, a prepolymerization kettle 93, and a final polymerization kettle 94 arranged in sequence. The mixing tank 91, the esterification kettle 92, the prepolymerization kettle 93, and the final polymerization kettle are all connected by pipelines. A booster pump 931 is provided on the pipeline connecting the final polymerization kettle 93 and the spinning box 1.

[0030] The pipeline connecting the esterification reactor 92 and the prepolymerization reactor 93 is provided with an injection pipeline 921 and an injection pipeline 922 arranged in parallel.

[0031] In the specific polymerization reaction process, the matting agent is added to the prepolymer reactor 93 through injection pipe 1 921 and injection pipe 2 922. In the specific reaction process, the slurry is first prepared through the slurry mixing tank 91 and then through the esterification reactor 92. By setting the injection pipe 1 921 and injection pipe 2 922 for matting agent injection in the pipeline between the esterification reactor 92 and the prepolymer reactor 93, the matting agent can be uniformly dispersed in the melt and is not easy to settle.

[0032] The preparation of fully dull polyester melt is achieved by adding an inorganic suspension during the oligomerization stage of polyester polymerization. Fully dull polyester filament is then directly produced by melt spinning. Compared with the original method of adding fully dull masterbatch online during the final polymerization stage of polyester melt, which requires drying, crystallization, injection, and mixing of the fully dull masterbatch, the process is simpler, requires less equipment, has lower manufacturing costs, and is easier to scale up. According to financial calculations, the unit manufacturing cost can be reduced by about 650 yuan / ton. It can be seen that the technology of producing fully dull polyester filament by in-situ polymerization has a significant cost advantage.

[0033] Compared with the production method of online injection of masterbatch, the technology of producing fully dull polyester filament by in-situ polymerization is significantly superior in terms of performance and indicators. Electron microscopy can be used to observe that the dulling agent is more uniformly dispersed in the polyester filament, and the CV values ​​of physical properties such as breaking strength, breaking elongation, thermal stress, and yarn unevenness are significantly lower than those of products produced by the traditional online injection of masterbatch.

[0034] The performance tests of the ultra-soft matte cotton-like polyester fiber products prepared by this ultra-soft matte cotton-like polyester fiber preparation device are shown in Table 1 below:

[0035] Table 1. Performance Tests of Products Produced by This Ultra-Soft Matte Cotton-like Polyester Fiber Preparation Device

[0036]

[0037] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A device for preparing ultra-soft matte cotton-like polyester fiber, characterized in that, The ultra-soft matte imitation cotton polyester fiber preparation device includes, from bottom to top, the following components arranged in sequence: spinning box (1), air box (2), oil nozzle (3), yarn guide (4), yarn separator (5), pre-networker (6), guide plate one (71), guide plate two (72), and winding machine (8). The bellows (2) contains a number of evenly arranged air ducts (21). The pre-networker (6) is provided with an atmospheric pressure pipeline (61) and a high pressure pipeline (62), which are connected in parallel.

2. The apparatus for preparing ultra-soft matte cotton-like polyester fiber according to claim 1, characterized in that, A control valve (621) is installed on the high-pressure pipeline (62).

3. The apparatus for preparing ultra-soft matte cotton-like polyester fiber according to claim 2, characterized in that, The control valve (621) is equipped with a timing controller (622).

4. The apparatus for preparing ultra-soft matte cotton-like polyester fiber according to claim 2, characterized in that, The spinning box (1) is connected to the polymerization reaction device (90).

5. The apparatus for preparing ultra-soft matte cotton-like polyester fiber according to claim 2, characterized in that, The polymerization reactor (90) includes a mixing tank (91), an esterification reactor (92), a prepolymerization reactor (93), and a final polymerization reactor (94) arranged in sequence, and the mixing tank (91), the esterification reactor (92), the prepolymerization reactor (93), and the final polymerization reactor are all connected by pipelines.

6. The apparatus for preparing ultra-soft matte cotton-like polyester fiber according to claim 5, characterized in that, A booster pump (931) is installed on the pipeline connecting the final polymerization reactor and the spinning box (1).

7. The apparatus for preparing ultra-soft matte cotton-like polyester fiber according to claim 5, characterized in that, The pipeline connecting the esterification vessel (92) and the prepolymerization vessel (93) is provided with injection pipeline one (921) and injection pipeline two (922) connected in parallel.

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