A method for producing high-bundling untwisted glass fiber

Abstract

The present invention provides a method for producing high-bundling untwisted glass fiber, belonging to the technical field of glass fiber production. During the warping process of the raw silk, oil coating treatment is carried out, and the equipment used for the oil coating treatment includes an oil tank, an oiling roller, a yarn outlet guide roller and a yarn covering device. The oil tank is filled with a yarn lubricant, and the liquid level of the yarn lubricant in the oil tank is higher than the lowest point of the oiling roller and lower than the highest point of the oiling roller; the yarn covering device includes a yarn threading box fixed on the oil tank, the yarn threading box is located between the oiling roller and the yarn outlet guide roller, and the yarn threading box has a plurality of yarn threading holes parallel to the yarn running direction. Two air inlet slots are arranged at one end of the yarn threading box close to the oiling roller, and a laterally distributed long strip yarn running channel is formed between the two air inlet slots. The yarn running path is: passing through the top surface of the oiling roller, the yarn running channel, the yarn threading hole and the yarn outlet guide roller in sequence; the inlets of the two air inlet slots are both connected to the air outlet end of a blower. The present invention has the advantages of being able to improve the bundling of glass fibers.

Description

Technical Field

[0001] The invention belongs to the technical field of glass fiber production and relates to a production method of high-bundling untwisted glass fiber. Background Art

[0002] Glass fiber cloth is one of the main materials of mica board. The glass fiber used to weave glass fiber cloth is a high modulus fiber. Compared with traditional textile yarns, glass fiber is generally harder and more brittle, so some modifications are needed during actual production and processing.

[0003] Glass fiber is a brittle material with poor wear resistance and shear resistance, small elongation at break, poor flexure, and easy to fluff when rubbing against each other, so there are many difficulties in weaving. In addition, because the untwisted / weakly twisted filament bundles lack cohesion and poor bundling, excessive friction will cause the filaments to fibrillate (i.e., the surface of the fiber bundles splits into tiny microfibers). The microfibers formed by fibrillation are curly and easily self-rolled or intertwined to form balls. The fibrillation of glass fiber not only affects the physical properties of the bundle itself, but also affects the smoothness of the fabric. Moreover, glass fiber itself is a poor conductor. The microfibers dispersed around the filaments will make it difficult for the accumulated charge to dissipate, which will further cause splitting and entanglement, and will further affect the material properties of the filaments and the smoothness of the fabric.

[0004] In addition, during the weaving process, various frictions such as friction between yarns, friction between yarns and healds, and friction between yarns and reeds will cause relatively fine monofilaments to become fuzzy and some of them will break first. If they are not cleared in time, they will become entangled with each other, resulting in unclear openings and wrong weft insertions. In severe cases, the entire filament will break, resulting in uneven distribution of yarn on the cloth surface.

[0005] In order to improve the weaving performance of glass fiber, the commonly used method at home and abroad is sizing. Some starch-based sizing agents were used earlier, and recently polyvinyl alcohol sizing agents are mainly used in electronic-grade glass fiber cloth. However, in order to further reduce costs, in the process of making ultra-fine glass fiber cloth such as D900 and D450, untwisted and unsizing weaving is proposed, that is, the unsizing fine yarn is directly put on the machine for weaving.

[0006] This patent aims to solve the problems of untwisted and unslurry glass fiber in the weaving process. Starting from improving the glass fiber bundling performance, an oiling device is designed and installed in the warping equipment. By adding this oiling process, the cohesion between the monofilaments can be improved, the discreteness of the filaments in the yarn can be reduced, and the durability of the yarn and fabric can be improved. Summary of the invention

[0007] The purpose of the present invention is to provide a method for producing high-bundling untwisted glass fibers in view of the above-mentioned problems existing in the prior art. The technical problem to be solved by the present invention is how to improve the bundling of glass fibers.

[0008] The object of the present invention can be achieved by the following technical scheme: a method for producing high-bundling untwisted glass fiber, characterized in that oil coating treatment is performed during the warping process of the raw yarn, and the equipment used for the oil coating treatment includes an oil tank, an oiling roller, a yarn outlet guide roller and a yarn covering device, the oil tank is filled with a yarn moistening oil, and the liquid level of the yarn moistening oil in the oil tank is higher than the lowest point of the oiling roller and lower than the highest point of the oiling roller;

[0009] The yarn covering device includes a yarn threading box fixed on the oil tank, the yarn threading box is located between the oiling roller and the yarn outlet guide roller, the yarn threading box has a plurality of yarn threading holes parallel to the yarn running direction, and two air inlet grooves are arranged at one end of the yarn threading box close to the oiling roller, and a laterally distributed long strip yarn running channel is formed between the two air inlet grooves, and the yarn running path is: passing through the top surface of the oiling roller, the yarn running channel, the yarn threading holes and the yarn outlet guide roller in sequence; the inlets of the two air inlet grooves are both connected to the air outlet end of a blower.

[0010] Furthermore, the inlet cross section of the yarn passage is larger than the outlet cross section.

[0011] Furthermore, the yarn threading hole has spiral air-guiding ribs.

[0012] Furthermore, the inlet diameter of the yarn threading hole is larger than the outlet diameter.

[0013] Furthermore, the yarn threading box is assembled from two halves, and the two halves are symmetrically distributed up and down.

[0014] Furthermore, the yarn conditioning oil is a compound comprising dipropylene glycol methyl ether, fatty ether, an electrostatic agent and a softener.

[0015] Oiling agent is used to improve the bundling performance of untwisted filaments, increase the cohesion between monofilaments, and reduce the discreteness of filaments in yarns; at the same time, after the yarn is oiled, airflow is used to bundle it twice. The first time is when the yarn passes through the yarn passage and the threading hole, the airflow in the upper and lower directions acts on the yarn, so that the discretely distributed spun yarn outside the long yarn tends to be parallel to the long yarn, so that its curling degree is weakened. Then, the yarn enters the threading hole, and the airflow in the threading hole is formed by the spiral air guide ribs to form a cyclone. The cyclone acts on the outside of the monofilament, and the spun yarn outside the long yarn is driven to be wound on the long yarn, so that the naturally curled spun yarn can be wrapped around the long yarn in a winding manner, further improving the bundling of glass fiber. Under the action of airflow, the broken yarn adhering to the outside of the filament can also be peeled off, the broken yarn debris can be cleaned, and the oiling agent covering the yarn can also be homogenized to improve the uniformity of the distribution of the oiling agent on the yarn.

[0016] It can increase the lubricity and wear resistance of the filament itself, reduce the stiffness of the fiber, reduce the fuzzing and wire breakage during weaving, and make weaving go smoothly.

[0017] The impregnating oil agent is a compound made of dipropylene glycol methyl ether and fatty ether, with the addition of an electrostatic agent and a softener system. It has a viscosity of about 5.6 and is directly applied during the warping of the original yarn. It can make the yarn soft and soluble in silicone without affecting the subsequent silicone-glass composite to form mica paper.

[0018] The oil agent used in the present invention is volatile and can be directly volatilized during the later use process without desizing treatment. It has the advantages of low cost and high performance in the process of processing untwisted or weakly twisted glass fiber raw yarns, can reduce fibrillation in the weaving process, improve weaving accuracy, and improve fabric performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a warping flow chart.

[0020] Figure 2 It is a structural schematic diagram of the raw silk oiling equipment.

[0021] Figure 3 It is a transverse cross-sectional view of the yarn covering device.

[0022] Figure 4 It is a schematic diagram of the three-dimensional structure of the yarn covering device.

[0023] Figure 5 It is a schematic diagram of the principle that the fine yarns discretely distributed outside the long yarns are wrapped around the long yarns by the air flow.

[0024] In the figure, 1, oil tank; 2, oiling roller; 3, yarn outlet guide roller; 4, yarn covering device; 5, yarn threading box; 6, yarn threading hole; 7, air inlet slot; 8, yarn walking channel; 9, air guide ribs; a, creel; b, yarn threading plate; c, tension controller; d, static electricity elimination device; e, yarn pressing plate; f, oil covering equipment; g, sizing machine head. DETAILED DESCRIPTION

[0025] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0026] like Figure 1-Figure 4 As shown, during warping, the raw yarn passes through the creel a, the yarn threading plate b, the tension controller c, the static elimination device d, the yarn pressing plate e, the oiling device f, and the warping machine head g in sequence, and the raw yarn is oiled before being wound up by the warping machine head g. The oiling device f includes an oil tank 1, an oiling roller 2, a yarn outlet guide roller 3 and a yarn covering device 4. The oil tank 1 is filled with a yarn moistening oil, and the liquid level of the yarn moistening oil in the oil tank 1 is higher than the lowest point of the oiling roller 2 and lower than the highest point of the oiling roller 2.

[0027] The yarn covering device 4 includes a yarn threading box 5 fixed on the oil tank 1, the yarn threading box 5 is located between the oiling roller 2 and the yarn outlet guide roller 3, and has a plurality of yarn threading holes 6 parallel to the yarn running direction. The yarn threading box 5 is provided with two air inlet grooves 7 at one end close to the oiling roller 2, and a laterally distributed long strip yarn running channel 8 is formed between the two air inlet grooves 7. The yarn running path is: passing through the top surface of the oiling roller 2, the yarn running channel 8, the yarn threading holes 6 and the yarn outlet guide roller 3 in sequence; the entrances of the two air inlet grooves 7 are connected to the air outlet end of a blower; the oiling roller 2 can be driven by a motor to rotate in one direction to drive the yarn to move toward the machine head, and can also be passively rotated under the action of the yarn traction force.

[0028] The inlet cross section of the yarn passage 8 is larger than the outlet cross section, so that the airflow is discharged in a pressurized state, the inlet diameter of the yarn threading hole 6 is larger than the outlet diameter, and the yarn threading hole 6 has a spiral air guide rib 9, which further increases the pressure and makes the airflow vortex-shaped and discharged from the outlet of the yarn threading hole 6.

[0029] The yarn threading box 5 is assembled by two half bodies, and the two half bodies are symmetrically distributed up and down. When threading the yarn for the first time, the half body on the top can be disassembled, so that the yarn is put into place, and then the half body on the top is covered.

[0030] The yarn lubricant is a compound containing dipropylene glycol methyl ether, fatty ether, electrostatic agent and softener. The optional ratio is: 67% by mass of dipropylene glycol methyl ether, 20% by mass of dipropylene glycol methyl ether, 1.5% by mass of electrostatic agent SH-105, 5% by mass of Rrj-213 non-ionic softener and the balance of ethanol; the present invention does not limit and protect the component amounts of the compound, because a wide range of volatile liquids or mixed liquids can effectively bundle the yarns by applying, which has the effect of liquid surface tension and liquid viscosity. Of course, the above formula with the characteristics required for glass fiber production is better.

[0031] Oiling agent is used to improve the bundling performance of untwisted filaments, increase the cohesion between monofilaments, and reduce the discreteness of filaments in the yarn; at the same time, the yarn is bundled twice by airflow after oiling. Figure 5 As shown in Figure A, there are curly spun yarns distributed discretely outside the long yarns. When the yarn passes through the yarn passage 8 and the yarn threading hole 6 for the first time, the airflow in the upper and lower directions acts on the yarn, making the spun yarns distributed discretely outside the long yarns tend to be parallel to the long yarns, so that the curliness is weakened. The state of the yarn after the airflow acts once is as follows: Figure 5 As shown in Figure B, the yarn then enters the yarn threading hole 6. The airflow in the yarn threading hole 6 is acted upon by the spiral air guide ribs 9 to form a cyclone. The cyclone acts on the outside of the monofilament, and forms a force on the spun yarn outside the long yarn to drive it to wind around the long yarn, thereby making the naturally curly spun yarn wrap around the long yarn in a winding manner. The state after the spun yarn wraps around the long yarn is shown in Figure 1. Figure 5 As shown in Figure C, the bundling of the glass fiber is further improved.

[0032] It can increase the lubricity and wear resistance of the filament itself, reduce the stiffness of the fiber, reduce the fuzzing and wire breakage during weaving, and make weaving go smoothly.

[0033] The impregnating oil agent is a compound made of dipropylene glycol methyl ether and fatty ether, with the addition of an electrostatic agent and a softener system. It has a viscosity of about 5.6 and is directly applied during the warping of the original yarn. It can make the yarn soft and soluble in silicone without affecting the subsequent silicone-glass composite to form mica paper.

[0034] The oil agent used in the present invention is volatile and can be directly evaporated during the later use process without desizing treatment. It has the advantages of low cost and high performance in the processing of untwisted or weakly twisted glass fiber precursors, and can reduce fibrillation in the weaving process, improve weaving accuracy, and improve fabric performance; the precursors mentioned in the present application also have a certain degree of fibrillation, but the friction in the weaving process will further cause the fibrillation of the fibers. The treatment done in the present application improves its bundling properties to reduce the fibrillation caused by friction in the weaving process, weaken the adverse effects of friction in subsequent processes, and improve the performance of fiber products and fiber fabrics.

[0035] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A method for producing high-bundling untwisted glass fiber, characterized in that: During the warping process of the raw silk, an oil coating treatment is performed, and the equipment used for the oil coating treatment comprises an oil tank (1), an oiling roller (2), a yarn outlet guide roller (3) and a yarn covering device (4), wherein the oil tank (1) contains a yarn lubricant, and the liquid level of the yarn lubricant in the oil tank (1) is higher than the lowest point of the oiling roller (2) and lower than the highest point of the oiling roller (2); The yarn covering device (4) comprises a yarn threading box (5) fixed on the oil tank (1), the yarn threading box (5) being located between the oiling roller (2) and the yarn outlet guide roller (3), the yarn threading box (5) having a plurality of yarn threading holes (6) parallel to the yarn running direction, the yarn threading box (5) being provided with two air inlet grooves (7) at one end close to the oiling roller (2), a laterally distributed long strip yarn running channel (8) being formed between the two air inlet grooves (7), the yarn running path being: passing through the top surface of the oiling roller (2), the yarn running channel (8), the yarn threading holes (6) and the yarn outlet guide roller (3) in sequence; the inlets of the two air inlet grooves (7) are both connected to the air outlet end of a blower; The yarn threading hole (6) is provided with a spiral air guiding convex rib (9).

2. The method for producing a high-bundling untwisted glass fiber according to claim 1, characterized in that: The inlet cross section of the yarn passage (8) is larger than the outlet cross section.

3. The method for producing a high-bundling untwisted glass fiber according to claim 1, characterized in that: The inlet diameter of the yarn threading hole (6) is larger than the outlet diameter.

4. The method for producing a high-bundling untwisted glass fiber according to claim 3, characterized in that: The yarn threading box (5) is assembled from two halves, which are symmetrically distributed up and down.

5. A method for producing a high-bundling untwisted glass fiber according to any one of claims 1 to 4, characterized in that: The yarn conditioning oil is a compound containing dipropylene glycol methyl ether, fatty ether, an electrostatic agent and a softener.

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