Process for processing colored island-in-the-sea composite yarn for vehicle trim

Abstract

This application belongs to the field of island-island composite yarn technology, specifically providing a processing technology for colored island-island composite yarn for automotive trim, including the following steps: 1) Drying PET and COPET for later use; 2) Melting and filtering the dried PET and COPET separately, then performing composite spinning using a 61-island spinneret, followed by cooling, oiling, drawing, and winding to obtain the final product. The island-island composite yarn obtained by this application has the advantages of high color fastness, high linear density, and good mechanical properties.

Description

Technical Field

[0001] This application belongs to the field of island composite yarn technology, and in particular relates to a processing technology for colored island composite yarn for automotive trim. Background Technology

[0002] Island-type composite fiber spinning technology has matured over decades and become a fundamental process for producing high-performance fibers. From a cross-sectional perspective, island-type fibers consist of one component surrounded by another in a finely dispersed state, resembling numerous islands in the sea. This distribution is continuous, dense, and uniform along the fiber axis.

[0003] With the development of new energy vehicles and the increasing pursuit of aesthetics and quality in automotive interiors, the chemical fiber industry has been driven to invest in and research and development in this area. Among these, island-type composite fibers, due to their advantages in imitation leather, have seen a stronger demand for in-depth development in automotive interior materials. For example, patent application CN110512433A discloses a method for preparing interior materials for automotive seat covers. This method involves impregnating nylon, EPDM rubber modified with chloroprene rubber, and then impregnating and pressing the fibers with rollers to extract the "sea" component from the island-type fibers. This results in bundles of ultrafine fibers forming "islands," creating island-type microfiber leather composed entirely of ultrafine fiber bundles and a network of PU resin sponge, exhibiting excellent elasticity.

[0004] For example, patent application CN108660792A discloses a production process for automotive interior fabrics, using polyester island-island yarn as raw material, with a single filament linear density of 0.05–0.08 dtex. The production process includes pretreatment, pre-forming, napping, fiber opening, dyeing, drying, brushing, setting, and finished product. The resulting fabric has good sun resistance and a soft hand feel. Currently, the linear density and specific surface area of ​​conventional island-island composite yarns are still insufficient. Further increasing the linear density of the fiber requires increasing the number of island components, which greatly increases the difficulty of spinning. There are also bottlenecks such as complex dyeing processes and poor color fastness of the fabric. Therefore, improving the overall performance of island-island composite yarns still faces significant challenges. Summary of the Invention

[0005] To address the aforementioned issues and further improve the overall performance of island-type composite yarns, such as linear density and color fastness, this application provides a processing technology for colored island-type composite yarns used in automotive trim.

[0006] This application provides a processing technology for colored island composite yarns used in automotive trim, including the following steps: 1) Take PET and COPET, dry them, and set them aside for later use; 2) The dried PET and COPET are melt-filtered separately, and then composite spinning is carried out using a 61-island spinneret. After cooling, oiling, drawing and winding, the product is obtained.

[0007] Furthermore, in step 1), the moisture content of PET and COPET after drying is less than 30 ppm.

[0008] Furthermore, in step 2), the mass ratio of PET to COPET is 60-65:35-40.

[0009] Furthermore, in step 2), the melting temperature of PET is 275-290℃.

[0010] Furthermore, in step 2), the melting temperature of COPET is 270-280℃.

[0011] Furthermore, in step 2), an interface material is added to the PET during the melting process. This interface material is prepared using the following method: S1: Mix calcium chloride and ethanol evenly, then add triethylamine and mix evenly to obtain a mixture, then add 2-aldehyde phenylboronic acid and continue mixing to obtain a solution; S2: Pass excess carbon dioxide into the solution, and then filter to obtain the solution.

[0012] Furthermore, in step S1, the mass ratio of calcium chloride, ethanol, and triethylamine is (0.2-0.5):(100-120):(3-5).

[0013] Furthermore, in step S1, the amount of 2-aldehyde phenylboronic acid added is 5-10% of the mass of calcium chloride.

[0014] Furthermore, the water content of the interface material is less than 100 ppm.

[0015] Furthermore, in step 2), the specifications of the obtained composite filament are 75-225 dtex / 24-60f×61i.

[0016] Compared with the prior art, this application has the following beneficial effects: 1. This application uses PET and COPET as raw materials, employs solution dyeing technology, optimizes the matching of sea components and island components, and uses 61-island spinning components and spinnerets to prepare ultra-fine denier island-island composite yarn. It has extremely low linear density and high specific surface area, and has the advantages of high color fastness and environmental safety, which can meet the needs of interior textiles for new energy vehicles.

[0017] 2. While increasing the linear density, this application requires increasing the number of islands, which increases the difficulty of spinning. At this time, an interface material is added to the island component. The mechanical properties of the fiber are improved and the color fastness is enhanced through the nanorod-shaped interface material, thereby further improving the overall performance of the composite yarn. Detailed Implementation

[0018] The technical solutions of this application will be clearly and completely described below with reference to the embodiments of this application. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0020] When using “including,” “having,” and “contains” as described herein, the intention is to cover non-exclusive inclusion, unless an explicit qualifying term such as “only,” “consisting of,” etc., is used, in which case another component may be added.

[0021] The terms "preferred," "more preferably," "better," and "even better" used in this application refer to embodiments of this application that provide certain beneficial effects under certain circumstances. However, other embodiments may also be preferred under the same or other circumstances. Furthermore, the description of one or more preferred embodiments does not imply that other embodiments are unavailable, nor is it intended to exclude other embodiments from the scope of this application. That is, in this application, "preferred," "more preferably," "better," and "even better" are merely descriptions of implementations or embodiments with better effects, but do not constitute a limitation on the scope of protection of this application.

[0022] In this application, terms such as "further," "even more," and "particularly" are used for descriptive purposes and indicate differences in content, but should not be construed as limiting the scope of protection of this application.

[0023] In this application, "at least one" means one or more, such as one, two, or more. "Multiple" or "several" means at least two, such as two, three, etc., and "multi-layered" means at least two layers, such as two layers, three layers, etc., unless otherwise explicitly specified. In the description of this application, "several" means at least one, such as one, two, etc., unless otherwise explicitly specified.

[0024] When a numerical range is disclosed herein, the range is considered continuous and includes the minimum and maximum values ​​of the range, as well as every value between the minimum and maximum values. Furthermore, when the range refers to integers, it includes every integer between the minimum and maximum values ​​of the range. Additionally, when multiple ranges are provided to describe a feature or characteristic, the ranges may be combined. In other words, unless otherwise specified, all ranges disclosed herein should be understood to include any and all subranges to which they are incorporated.

[0025] Unless otherwise specified, all steps in this application may be performed sequentially or randomly. For example, the method comprising steps (a) and (b) indicates that the method may include steps (a) and (b) performed sequentially, or it may include steps (b) and (a) performed sequentially. For example, the mention that the method may also include step (c) indicates that step (c) may be added to the method in any order; for example, the method may include steps (a), (b), and (c), or it may include steps (a), (c), and (b), or it may include steps (c), (a), and (b), etc. Unless otherwise stated, singular terms may include plural forms and should not be construed as having a quantity of one.

[0026] In this application, "above" or "below" includes the number itself. For example, "below 1" includes 1.

[0027] In this application, room temperature refers to 0~40℃, including but not limited to 10~40℃, or further to 20~30℃.

[0028] This application, based on extensive experimental research, provides a processing technology for colored island composite yarns used in automotive trim, comprising the following steps: 1) Take PET and COPET, dry them, and set them aside for later use; 2) The dried PET and COPET are melt-filtered separately, and then composite spinning is carried out using a 61-island spinneret. After cooling, oiling, drawing and winding, the product is obtained.

[0029] Furthermore, in step 1), the moisture content of PET and COPET after drying is less than 30 ppm.

[0030] Furthermore, in step 2), the mass ratio of PET to COPET is 60-65:35-40.

[0031] In some specific embodiments, in step 2), the mass ratio of PET to COPET can be 60:40, 61:39, 62:38, 63:37, 64:36, or 65:35. More preferably, in step 2), a mass ratio of PET to COPET of 60:40 can achieve better experimental results.

[0032] Furthermore, in step 2), the melting temperature of PET is 275-290℃.

[0033] Furthermore, in step 2), the melting temperature of COPET is 270-280℃.

[0034] Furthermore, in step 2), an interface material is added to the PET during the melting process. This interface material is prepared using the following method: S1: Mix calcium chloride and ethanol evenly, then add triethylamine and mix evenly to obtain a mixture, then add 2-aldehyde phenylboronic acid and continue mixing to obtain a solution; S2: Pass excess carbon dioxide into the solution, and then filter to obtain the solution.

[0035] Furthermore, in step S1, the mass ratio of calcium chloride, ethanol, and triethylamine is (0.2-0.5):(100-120):(3-5).

[0036] In some specific embodiments, in step S1, the mass ratio of calcium chloride, ethanol, and triethylamine can be 0.2:100:3, 0.2:105:3, 0.2:110:3, 0.2:115:3, 0.2:120:3, 0.2:100:3, 0.25:100:3, 0.25:105:3, 0.25:110:3, 0.25:115:3, or 0.25:120. :3, 0.25:100:3, 0.3:100:3, 0.3:105:3, 0.3:110:3, 0.3:115:3, 0.3:120:3, 0.3:100:3, 0.35:100:3, 0.35:105:3, 0.35:110:3, 0.35:115:3, 0.35:120:3, 0.35:100:3, 0.4:100:3 0.4:105:3, 0.4:110:3, 0.4:115:3, 0.5:120:3, 0.4:100:3, 0.45:100:3, 0.45:105:3, 0.45:110:3, 0.45:115:3, 0.45:120:3, 0.45:100:3, 0.5:100:3, 0.5:105:3, 0.5:110:3, 0 The following ratios are preferred: 0.5:115:3, 0.5:120:3, 0.5:100:3, 0.2:100:4, 0.2:105:4, 0.2:110:4, 0.2:115:4, 0.2:120:4, 0.2:100:4, 0.2:100:5, 0.2:105:5, 0.2:110:5, 0.2:115:5, 0.2:120:5, and 0.2:100:5. More preferably, under normal circumstances, a mass ratio of calcium chloride, ethanol, and triethylamine of 0.3:100:5 in step S1 yields better experimental results.

[0037] Furthermore, in step S1, the amount of 2-aldehyde phenylboronic acid added is 5-10% of the mass of calcium chloride.

[0038] In some specific embodiments, in step S1, the amount of 2-aldehyde phenylboronic acid added can be 5%, 5.5%, 6%, 6.5%, 7%, 7.5%, 8%, 8.5%, 9%, 9.5%, or 10% of the mass of calcium chloride. More preferably, under normal circumstances, when the amount of 2-aldehyde phenylboronic acid added in step S1 is 8.5% of the mass of calcium chloride, better experimental results can be obtained. Furthermore, during the experiment, it was found that the introduction of 2-aldehyde phenylboronic acid into the island component can improve spinnability and fiber mechanical properties to a certain extent. This may be because the formation of a small amount of borate ester or boron oxide product between the thermal deboronization product of 2-aldehyde phenylboronic acid and the island component can improve the thermal stability and mechanical properties of the fiber.

[0039] Furthermore, the water content of the interface material is less than 100 ppm.

[0040] Furthermore, in step 2), the specifications of the obtained composite filament are 75-225 dtex / 24-60f×61i.

[0041] The present application will be further illustrated by the following examples, but these examples do not limit the scope of the present application.

[0042] When numerical ranges are given in the embodiments, it should be understood that, unless otherwise stated in this application, both endpoints of each numerical range and any value between the two endpoints may be selected. Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art. Where specific conditions are not specified in the embodiments, conventional conditions or conditions recommended by the manufacturer shall apply. All reagents or instruments whose manufacturers are not specified are conventional products that can be purchased commercially. In addition to the specific methods, equipment, and materials used in the embodiments, based on the knowledge of the prior art possessed by one of ordinary skill in the art and the description in this application, any prior art methods, equipment, and materials similar to or equivalent to those described, used, or made by the methods, equipment, and materials in the embodiments of this application may be used to implement this application.

[0043] Example 1 The processing technology for colored island composite yarn for automotive trim in this embodiment includes the following steps: 1) PET and PET masterbatch are dried to obtain PET material, and COPET is dried to obtain COPET material; the moisture content of PET material and COPET material is less than 30 ppm; 2) The dried PET and COPET materials are melted and filtered separately through screw extruders with independent temperature control. The screw extruder temperature control for COPET material is: Zone 1 270℃, Zone 2 275℃, Zone 3 280℃, Zone 4 275℃, Zone 5 275℃. The screw extruder temperature control for PET material is: Zone 1 275℃, Zone 2 280℃, Zone 3 285℃, Zone 4 290℃, Zone 5 285℃. After being metered by a metering pump, the components are fed into the spinning box of the same 61-island spinning assembly according to a 65:35 ratio. The components are then metered and distributed through their respective independent melt pipes. After being extruded from the spinneret, the yarn is cooled, cured, and oiled before being stretched and wound to obtain the island-island composite yarn with a specification of 225 dtex / 60f×61i.

[0044] The PET masterbatch in the PET material is black, and its addition amount is 15% of the PET mass. The intrinsic viscosity of PET is 0.67. The manufacturer of COPET is Yichang Jiuwan Polyester Materials Co., Ltd. During cooling, the air velocity is controlled at 0.4-0.5 m / s. During oiling, the oil concentration is controlled at 11, the oil content is 0.57%, and the oil temperature is 60±2℃. During stretching, the draw ratio is controlled at 1.6. During spinning, the pipe temperature is controlled at 280℃, the filter temperature is controlled at 280℃, the spinning temperature of the marine component is controlled at 280℃, and the spinning temperature of the island component is controlled at 282℃.

[0045] Example 2 The processing technology for colored island composite yarn for automotive trim in this embodiment includes the following steps: 1) PET and PET masterbatch are dried to obtain PET material, and COPET is dried to obtain COPET material; the moisture content of PET material and COPET material is less than 30 ppm; 2) The dried PET and COPET materials are melted and filtered separately through screw extruders with independent temperature control. The screw extruder temperature control for COPET material is: Zone 1 270℃, Zone 2 275℃, Zone 3 280℃, Zone 4 275℃, Zone 5 275℃. The screw extruder temperature control for PET material is: Zone 1 275℃, Zone 2 280℃, Zone 3 285℃, Zone 4 290℃, Zone 5 285℃. After being metered by a metering pump, the components are fed into the spinning box of the same 61-island spinning assembly according to a 60:40 ratio. The components are then fed into their respective independent melt pipes for metering and distribution. After being extruded from the spinneret, the yarn is cooled, cured, and oiled before being stretched and wound to obtain the island-island composite yarn with a specification of 225 dtex / 60f×61i.

[0046] The PET masterbatch in the PET material is black, and its addition amount is 15% of the PET mass. The intrinsic viscosity of PET is 0.67. The manufacturer of COPET is Yichang Jiuwan Polyester Materials Co., Ltd. During cooling, the air velocity is controlled at 0.4-0.5 m / s. During oiling, the oil concentration is controlled at 11, the oil content is 0.57%, and the oil temperature is 60±2℃. During stretching, the draw ratio is controlled at 1.6. During spinning, the pipe temperature is controlled at 280℃, the filter temperature is controlled at 280℃, the spinning temperature of the marine component is controlled at 280℃, and the spinning temperature of the island component is controlled at 282℃.

[0047] Example 3 The processing technology for colored island composite yarn for automotive trim in this embodiment includes the following steps: 1) Take PET, interface material and PET masterbatch and dry them to obtain PET material, take COPET and dry it to obtain COPET material; the moisture content of PET material and COPET material is less than 30ppm; The interface material in this embodiment is prepared by the following steps: S1: Add 0.3g of calcium chloride dihydrate and 100mL of anhydrous ethanol to a beaker and mix well. Then add 5mL of triethylamine and mix well to obtain a mixture. Then add 2-aldehyde phenylboronic acid and continue mixing to obtain a solution. S2: Pass excess carbon dioxide into the solution and stir to obtain a precursor solution. 2) The dried PET and COPET materials are melted and filtered separately through screw extruders with independent temperature control. The screw extruder temperature control for COPET material is: Zone 1 270℃, Zone 2 275℃, Zone 3 280℃, Zone 4 275℃, Zone 5 275℃. The screw extruder temperature control for PET material is: Zone 1 275℃, Zone 2 280℃, Zone 3 285℃, Zone 4 290℃, Zone 5 285℃. After being metered by a metering pump, the components are fed into the spinning box of the same 61-island spinning assembly according to a 60:40 ratio. The components are then fed into their respective independent melt pipes for metering and distribution. After being extruded from the spinneret, the yarn is cooled, cured, and oiled before being stretched and wound to obtain the island-island composite yarn with a specification of 225 dtex / 60f×61i.

[0048] The PET masterbatch in the PET material is black, and its addition amount is 15% of the PET mass. The intrinsic viscosity of PET is 0.67. The COPET is produced by Yichang Jiuwan Polyester Materials Co., Ltd., and the amount of interface material added is 2.5% of the PET mass. During cooling, the air velocity is controlled at 0.4-0.5 m / s. During oiling, the oil concentration is controlled at 11, the oil content is 0.57%, and the oil temperature is 60±2℃. During stretching, the draw ratio is controlled at 1.6. During spinning, the pipe temperature is controlled at 280℃, the filter temperature is controlled at 280℃, the spinning temperature of the marine component is controlled at 280℃, and the spinning temperature of the island component is controlled at 282℃. The amount of 2-aldehyde phenylboronic acid added is 8.5% of the calcium chloride mass.

[0049] Control group 1 The processing technology of island-to-sea composite yarn in this control group includes the following steps: 1) PA6 material is obtained by drying PA6 and PA6 masterbatch, and COPET material is obtained by drying COPET. The moisture content of PA6 material and COPET material is less than 30 ppm. 2) The dried PA6 material and COPET material are melted and filtered separately through screw extruders with independent temperature control. The screw extruder temperature control for COPET material is: Zone 1 270℃, Zone 2 275℃, Zone 3 280℃, Zone 4 275℃, Zone 5 275℃. The screw extruder temperature control for PA6 material is: Zone 1 270℃, Zone 2 275℃, Zone 3 280℃, Zone 4 280℃, Zone 5 280℃. After being metered by a metering pump, the components are fed into the spinning box of the same 61-island spinning assembly according to a 65:35 ratio. The components are then metered and distributed through their respective independent melt pipes. After being extruded from the spinneret, the yarn is cooled, cured, and oiled before being stretched and wound to obtain the island-island composite yarn with a specification of 225 dtex / 60f×61i.

[0050] In this PA6 material, the PA6 masterbatch is black and added at 15% of the PA6 mass. During cooling, the air velocity is controlled at 0.4-0.5 m / s. During oiling, the oil concentration is controlled at 11, the oil content at 0.57%, and the oil temperature at 60±2℃. During stretching, the draw ratio is controlled at 1.6. During spinning, the pipe temperature is controlled at 280℃, the filter temperature at 280℃, the spinning temperature of the marine component at 280℃, and the spinning temperature of the island component at 282℃.

[0051] Control group 2 The processing technology of island-to-sea composite yarn in this control group includes the following steps: 1) PA6 material is obtained by drying PA6 and PA6 masterbatch, and COPET material is obtained by drying COPET. The moisture content of PA6 material and COPET material is less than 30 ppm. 2) The dried PA6 material and COPET material are melted and filtered separately through screw extruders with independent temperature control. The screw extruder temperature control for COPET material is: Zone 1 270℃, Zone 2 275℃, Zone 3 280℃, Zone 4 275℃, Zone 5 275℃. The screw extruder temperature control for PA6 material is: Zone 1 270℃, Zone 2 275℃, Zone 3 280℃, Zone 4 280℃, Zone 5 280℃. After being metered by a metering pump, the components are fed into the spinning box of the same 61-island spinning assembly according to a 70:30 ratio. The components are then fed into their respective independent melt pipes for metering and distribution. After being extruded from the spinneret, the yarn is cooled, cured, and oiled before being stretched and wound to obtain the island-island composite yarn with a specification of 225 dtex / 60f×61i.

[0052] In this PA6 material, the PA6 masterbatch is black and added at 15% of the PA6 mass. During cooling, the air velocity is controlled at 0.4-0.5 m / s. During oiling, the oil concentration is controlled at 11, the oil content at 0.57%, and the oil temperature at 60±2℃. During stretching, the draw ratio is controlled at 1.6. During spinning, the pipe temperature is controlled at 280℃, the filter temperature at 280℃, the spinning temperature of the marine component at 280℃, and the spinning temperature of the island component at 282℃.

[0053] Performance testing The color fastness of the island composite yarns in Examples 1-3 and Control Groups 1-2 was tested using a YG611E solar climate color fastness tester. The results are shown in Table 1.

[0054] The mechanical properties of the island composite yarns in Examples 1-3 and Control Groups 1-2 were tested using an electronic single-strength testing machine. The test results are shown in Table 1.

[0055] As can be seen from the analysis of Table 1, the island composite yarn of this application has better mechanical properties and color fastness, better spinnability, and excellent overall performance, which can meet the performance requirements of automotive interior textiles.

[0056] Although this application 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 this application should be included within the protection scope of this application.

Claims

1. A processing technology for colored island composite yarn for automotive trim, characterized in that: Includes the following steps: 1) Take PET and COPET, dry them, and set them aside for later use; 2) The dried PET and COPET are melt-filtered separately, and then composite spinning is carried out using a 61-island spinneret. After cooling, oiling, drawing and winding, the product is obtained.

2. The processing technology for colored island composite yarn for automotive trim according to claim 1, characterized in that: In step 1), the moisture content of PET and COPET after drying is less than 30 ppm.

3. The processing technology for colored island composite yarn for automotive trim according to claim 1, characterized in that: In step 2), the mass ratio of PET to COPET is 60-65:35-40.

4. The processing technology for colored island composite yarn for automotive trim according to claim 1, characterized in that: In step 2), the melting temperature of PET is 275-290℃.

5. The processing technology for colored island composite yarn for automotive trim according to claim 1, characterized in that: In step 2), the melting temperature of COPET is 270-280℃.

6. The processing technology for colored island composite yarn for automotive trim according to claim 1, characterized in that: In step 2), an interface material is added to the PET during the melting process. The interface material is prepared by the following steps: S1: Mix calcium chloride and ethanol evenly, then add triethylamine and mix evenly to obtain a mixture, then add 2-aldehyde phenylboronic acid and continue mixing to obtain a solution; S2: Pass excess carbon dioxide into the solution, and then filter to obtain the solution.

7. The processing technology for colored island composite yarn for automotive trim according to claim 6, characterized in that: In step S1, the mass ratio of calcium chloride, ethanol and triethylamine is (0.2-0.5):(100-120):(3-5).

8. The processing technology for colored island composite yarn for automotive trim according to claim 6, characterized in that: In step S1, the amount of 2-aldehyde phenylboronic acid added is 5-10% of the mass of calcium chloride.

9. The processing technology for colored island composite yarn for automotive trim according to claim 6, characterized in that: The water content of the interface material is less than 100 ppm.

10. The processing technology for colored island composite yarn for automotive trim according to claim 1, characterized in that: In step 2), the specifications of the obtained composite filament are 75-225dtex / 24-60f×61i.

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