A method for heat setting a glass fiber yarn

Abstract

The present application relates to the technical field of glass fiber, and particularly relates to a glass fiber yarn heat setting treatment method, which comprises the following steps: step 1: placing electronic-grade glass fiber yarn on a yarn machine, then placing the yarn machine in a steam furnace, and closing the door of the steam furnace; step 2: starting a vacuum pump on the steam furnace to perform vacuumization on the furnace; step 3: continuously adding hot steam into the steam furnace; and step 4: releasing the pressure in the furnace, opening the door of the steam furnace, and completing production. On the basis of the production of the existing electronic yarn product, the steam furnace is subjected to process parameter test, and the best production process is matched, so that the heat set yarn meeting the requirements of customers is obtained, including the transfer of the raw yarn, the setting of the machine parameter, and the checking of the process, which is beneficial to eliminating the internal stress between the fiber assemblies in each stage of spinning, and the heat setting performance of the yarn after production is evaluated, the yarn is tight and has no looseness, and has certain resistance to degradation, which meets the requirements of customers and the market.

Description

Technical Field

[0001] This invention relates to the field of glass fiber technology, and in particular to a method for heat setting glass fiber yarn. Background Technology

[0002] During the processing of wool raw materials into yarn, repeated stress and friction cause internal stress imbalance and deformation, resulting in fatigue and static electricity. Simultaneously, the twisting process introduces significant untwisting torque into the wool yarn, affecting subsequent production processes. The process of stabilizing yarn twist using heat and humidity conditions prevents knots and loops during slack-out, avoiding defects such as weft shrinkage in the fabric.

[0003] After twisting, the fibers in the yarn experience internal stress due to stretching, making the yarn twist unstable. Increasing the temperature or moisture regain can weaken the intermolecular forces between fiber macromolecules, relaxing the fibers and eliminating the internal stress resisting twisting, thus stabilizing the yarn twist. Steaming technology was first applied in wool spinning and wool-polyester blending processes to solve problems such as fabric instability and static electricity. With the development of the textile industry, steaming technology has been applied to cotton, linen, and chemical fibers. As the application fields of glass fiber gradually expand and market demand becomes increasingly diversified, there is still no heat-setting technology for electronic-grade glass fiber yarn. Summary of the Invention

[0004] The purpose of this invention is to provide a heat setting method for glass fiber yarn, which can solve the above-mentioned technical problems.

[0005] This invention provides a method for heat setting glass fiber yarn, comprising the following steps:

[0006] Step 1: Place the electronic-grade glass fiber yarn on the yarn cart, then place the yarn cart inside the steam oven and close the steam oven door;

[0007] Step 2: Turn on the vacuum pump on the steam furnace to create a vacuum inside the furnace;

[0008] Step 3: Continuously inject hot steam into the steam furnace;

[0009] Step 4: Release the pressure inside the furnace, open the steam furnace door, and production is complete.

[0010] Preferably, the vacuum pump frequency in step 2 is set to 45-65 Hz.

[0011] Preferably, the vacuum degree of the steam furnace body is 0.02-0.09 MPa.

[0012] Preferably, the vacuum degree of the steam furnace body is 0.06 MPa.

[0013] Preferably, in step 3, hot steam is continuously injected into the steam furnace for 6-10 hours.

[0014] Preferably, in step 3, hot steam is continuously injected into the steam furnace for 8 hours.

[0015] Preferably, the temperature inside the steam furnace is maintained at 70°C.

[0016] Preferably, the saturated steam pressure inside the steam furnace is 0.1-1.2 MPa.

[0017] The beneficial effects of this invention are:

[0018] Based on the existing production of electronic yarn products, this invention conducts process parameter tests on the steam furnace to match the optimal production process and achieve heat-set yarn that meets customer requirements. This includes the transfer of raw yarn, setting of machine parameters, and process inspection, which helps to eliminate internal stress between fiber assemblies at each stage of spinning. After production, the heat-setting performance is evaluated, and the yarn bobbin is tight and free of looseness, with a certain resistance to unwinding, meeting customer and market requirements. Detailed Implementation

[0019] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of this application. Unless otherwise specified, 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 pertains.

[0020] It should be noted that the terminology used herein is for the purpose of describing particular implementations only and is not intended to limit the exemplary implementations according to this application. As used herein, the singular form includes the plural form unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this description, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0021] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Example 1

[0023] A method for heat setting glass fiber yarn includes the following steps:

[0024] Step 1: Place the electronic-grade glass fiber yarn on the yarn cart, then place the yarn cart inside the steam oven and close the steam oven door;

[0025] Step 2: Turn on the vacuum pump on the steam furnace to evacuate the furnace to a vacuum level of 0.06 MPa;

[0026] Step 3: Turn on the humidification valve and inject 0.8 MPa saturated steam into the furnace for 8 hours, keeping the furnace temperature at 70°C.

[0027] Step 4: After the set time is up, open the vent valve to release the pressure inside the furnace, open the steam furnace door, and production is complete.

[0028] Example 2

[0029] A method for heat setting glass fiber yarn includes the following steps:

[0030] Step 1: Place the electronic-grade glass fiber yarn on the yarn cart, then place the yarn cart inside the steam oven and close the steam oven door;

[0031] Step 2: Turn on the vacuum pump on the steam furnace to evacuate the furnace to a vacuum level of 0.02 MPa;

[0032] Step 3: Turn on the humidification valve and inject 0.8 MPa saturated steam into the furnace for 6 hours, keeping the furnace temperature at 70°C.

[0033] Step 4: After the set time is up, open the vent valve to release the pressure inside the furnace, open the steam furnace door, and production is complete.

[0034] Example 3

[0035] A method for heat setting glass fiber yarn includes the following steps:

[0036] Step 1: Place the electronic-grade glass fiber yarn on the yarn cart, then place the yarn cart inside the steam oven and close the steam oven door;

[0037] Step 2: Turn on the vacuum pump on the steam furnace to evacuate the furnace to a vacuum level of 0.09 MPa;

[0038] Step 3: Turn on the humidification valve and inject 0.8 MPa saturated steam into the furnace for 10 hours, keeping the furnace temperature at 70°C.

[0039] Step 4: After the set time is up, open the vent valve to release the pressure inside the furnace, open the steam furnace door, and production is complete.

[0040] Comparative Example 1

[0041] A method for heat setting glass fiber yarn includes the following steps:

[0042] Step 1: Place the electronic-grade glass fiber yarn on the yarn cart, then place the yarn cart inside the steam oven and close the steam oven door;

[0043] Step 2: Turn on the vacuum pump on the steam furnace to evacuate the furnace to a vacuum level of 0.015 MPa;

[0044] Step 3: Turn on the humidification valve and inject 0.8 MPa saturated steam into the furnace for 12 hours, keeping the furnace temperature at 60°C.

[0045] Step 4: After the set time is up, open the vent valve to release the pressure inside the furnace, open the steam furnace door, and production is complete.

[0046] Comparative Example 2

[0047] A method for heat setting glass fiber yarn includes the following steps:

[0048] Step 1: Place the electronic-grade glass fiber yarn on the yarn cart, then place the yarn cart inside the steam oven and close the steam oven door;

[0049] Step 2: Turn on the vacuum pump on the steam furnace to evacuate the furnace to a vacuum level of 0.1 MPa;

[0050] Step 3: Turn on the humidification valve and inject 0.8 MPa saturated steam into the furnace for 4 hours, keeping the furnace temperature at 80°C.

[0051] Step 4: After the set time is up, open the vent valve to release the pressure inside the furnace, open the steam furnace door, and production is complete.

[0052] Test case

[0053] The glass fibers prepared in Examples 1-3 and Comparative Examples 1-2 were tested using conventional methods. The test results are shown in the table below:

[0054] Testing items <![CDATA[3mm hairiness index / root·m -1 > CV / % of strips Example 1 1.95 16.98 Example 2 2.13 17.36 Example 3 3.21 20.85 Comparative Example 1 20.69 25.66 Comparative Example 2 23.06 27.28

[0055] Table 1 shows that the 3mm hairiness index of the glass fiber yarn prepared by the method of the present invention is significantly lower than that of Comparative Examples 1-2, indicating that the heat setting treatment method of the present invention can significantly reduce the hairiness of the yarn; its evenness CV value is lower than that of Comparative Examples 1-2, indicating that the heat setting treatment method of the present invention can improve the evenness of the yarn and improve the quality of the yarn.

[0056] In addition, the glass fiber yarn prepared in Example 1 was compared with the electronic yarn (which has not been treated by the heat setting method of this invention) that passed the inspection after normal production. The heat setting performance of the yarn was evaluated. The yarn in Example 1 was tighter and had no looseness than the yarn that had not been heat set, and it had a certain resistance to unwinding, which met the requirements of customers and the market.

[0057] The above detailed description is a specific description of one of the feasible embodiments of the present invention. This embodiment is not intended to limit the patent scope of the present invention. All equivalent implementations or modifications that do not depart from the present invention should be included within the scope of the technical solution of the present invention.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for heat setting glass fiber yarn, characterized in that, Includes the following steps: Step 1: Place the electronic-grade glass fiber yarn on the yarn cart, then place the yarn cart inside the steam oven and close the steam oven door; Step 2: Turn on the vacuum pump on the steam furnace to evacuate the furnace. The vacuum pump frequency is set to 45-65 Hz; the vacuum degree of the steam furnace body is 0.02-0.09 MPa. Step 3: Continuously add steam with a saturated steam pressure of 0.1-1.2 MPa into the steam furnace for 6-10 hours, while maintaining the temperature inside the steam furnace at 70°C; Step 4: Release the pressure inside the furnace, open the steam furnace door, and production is complete.

2. The heat setting method for glass fiber yarn according to claim 1, characterized in that, The vacuum degree of the steam furnace body is 0.06 MPa.

3. The heat setting method for glass fiber yarn according to claim 1, characterized in that, In step 3, hot steam is continuously injected into the steam furnace for 8 hours.