Fiber yarn containing basalt material as well as preparation method and application of fiber yarn

Abstract

The invention provides a fiber yarn containing a basalt material. The fiber yarn comprises a core layer and a skin layer wrapping the core layer. The core layer comprises 77-84 parts by weight of polyester, 15-20 parts by weight of basalt fiber powder and 1-3 parts by weight of a coupling agent; and the skin layer comprises polyester. Compared with the prior art, the basalt fiber is added into the polyester fiber in the form of a powder material, the characteristic of low heat conductivity of the basalt fiber can be exerted, and the heat preservation function of the polyester fiber is improved; meanwhile, the limitation that basalt inorganic fibers are high in rigidity and cannot be applied to the field of civil textile and clothing is overcome; and the basalt fiber powder is added into the core layer part of the polyester fiber, so that the addition amount of the powder can be increased to the maximum extent, and the influence of the material color and the fiber rigidity of the polyester fiber is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of fiber materials, and in particular relates to a fiber yarn containing basalt material, a preparation method and application thereof. Background Art

[0002] Basalt fiber is an inorganic fiber made of natural basalt as raw material, melted at a high temperature of 1450-1500℃, and drawn at high speed through a platinum-rhodium alloy drawing plate. As one of the four major fiber materials developed in my country, basalt fiber has excellent mechanical properties, acid and alkali corrosion resistance, high temperature resistance and insulation properties. At the same time, it has a wide range of sources, low cost, environmental protection and biodegradability, and is known as the "new green industrial material of the 21st century."

[0003] The main components of basalt fiber are silicon oxide, iron oxide, aluminum oxide, magnesium oxide, etc. Its thermal conductivity is approximately between 0.031 and 0.038 W / m·K. Its excellent thermal insulation performance has been widely used in the aerospace field.

[0004] As a thermal insulation material, it also has a huge application space in daily textiles and clothing, especially in winter warm clothing. However, as an inorganic fiber, existing basalt fiber has high stiffness and poor toughness. It is mainly used in industrial and industrial applications such as cables, canvas, and building materials. Direct contact with the skin may cause discomfort such as itching, which greatly limits its application in the field of daily textiles and clothing. Summary of the invention

[0005] In view of this, the technical problem to be solved by the present invention is to provide a fiber yarn containing basalt material, a preparation method and application thereof, wherein the fiber yarn containing basalt material has high thermal insulation performance and softness.

[0006] The present invention provides a fiber yarn containing basalt material, comprising a core layer and a skin layer wrapped outside the core layer;

[0007] The core layer comprises 77 to 84 parts by weight of polyester, 15 to 20 parts by weight of basalt fiber powder, and 1 to 3 parts by weight of coupling agent;

[0008] The skin layer comprises polyester.

[0009] Preferably, the mass ratio of the core layer to the skin layer is (20-30):(70-80).

[0010] Preferably, the polyester is polyethylene terephthalate;

[0011] The intrinsic viscosity of the polyester is 0.62 to 0.66 dl / g;

[0012] The melting point of the polyester is 250°C to 260°C.

[0013] Preferably, the mesh size of the basalt fiber powder is 10000 to 15000 mesh;

[0014] The density of the basalt fiber powder is 2.65-3.05 g / cm 3 ;

[0015] The basalt fiber powder comprises SiO2 49% to 53%, Al2O3 14% to 18%, Fe2O3 10.0% to 11.6%, MgO 5.0% to 9.0%, CaO 7.5% to 8.2%, and other mineral components 0.5% to 3.0%.

[0016] Preferably, the coupling agent is a silane coupling agent.

[0017] Preferably, the breaking strength of the fiber yarn containing basalt material is greater than 2.5 cN / dtex;

[0018] The elongation at break of the fiber yarn containing basalt material is greater than 20%;

[0019] The heat preservation rate of the fiber yarn containing basalt material is greater than 30%.

[0020] The present invention also provides a method for preparing the fiber yarn containing the above-mentioned basalt material, comprising the following steps:

[0021] S1) melt-extrude the core layer material and the skin layer material to obtain a core layer melt and a skin layer melt; the core layer material comprises 77-84 parts by weight of polyester, 15-20 parts by weight of basalt fiber powder, and 1-3 parts by weight of a coupling agent; the skin layer material comprises polyester;

[0022] S2) extruding the core layer melt and the skin layer melt through a core-skin type spinning composite assembly, cooling and shaping, oiling, and winding to obtain a pre-oriented yarn POY;

[0023] S3) stretching and false twisting the pre-oriented yarn POY to obtain a fiber yarn containing basalt material.

[0024] Preferably, the temperature of melt extrusion in step S1) is 260°C to 290°C;

[0025] The extrusion molding temperature in the step S2) is 275°C to 285°C; the cooling and shaping method is side wind cooling; the wind speed of the cooling and shaping is 0.5 to 0.8 m / s; the wind temperature of the cooling and shaping is 20°C to 23°C; the relative humidity of the cooling and shaping is 70% to 80%; the oiling rate of the oiling is 0.5% to 0.8%; and the winding rate is 2800 to 3000 m / min.

[0026] Preferably, the step S3) specifically comprises: sequentially passing the pre-oriented yarn POY through a first roller, a first heat box, a false twister, a second roller, a second heat box, a third roller, oiling and winding and shaping to obtain a fiber yarn containing basalt material;

[0027] The processing speed is 650-700 m / min; the drafting multiple is 1.3-1.5; the D / Y ratio of the false twister is 1.1-1.3; the temperature of the first hot box is 180°C-190°C; the temperature of the second hot box is 130°C-150°C; the second overfeed rate is 7.5%-7.8%; and the third overfeed rate is 4.3%-4.6%.

[0028] The present invention also provides a fabric, comprising the fiber yarn containing the basalt material.

[0029] The present invention provides a fiber yarn containing basalt material, comprising a core layer and a skin layer wrapped outside the core layer; the core layer comprises 77-84 parts by weight of polyester, 15-20 parts by weight of basalt fiber powder, and 1-3 parts by weight of a coupling agent; the skin layer comprises polyester. Compared with the prior art, the present invention adds basalt fiber to polyester fiber in the form of powder material, which can give play to the low thermal conductivity of basalt fiber and improve the thermal insulation function of polyester fiber; at the same time, it overcomes the limitation that basalt inorganic fiber has high rigidity and cannot be used in the field of civil textile clothing; and adding basalt fiber powder to the core layer of polyester fiber can maximize the amount of powder added and reduce the influence of the material color and fiber rigidity of the polyester fiber itself. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A schematic diagram of the cross-sectional structure of a fiber yarn containing basalt material provided by the present invention. DETAILED DESCRIPTION

[0031] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0032] The invention provides a fiber yarn containing basalt material, comprising a core layer and a skin layer wrapped outside the core layer; the core layer comprises 77 to 84 parts by weight of polyester, 15 to 20 parts by weight of basalt fiber powder, and 1 to 3 parts by weight of a coupling agent; the skin layer comprises polyester.

[0033] See also Figure 1 , Figure 1 A schematic diagram of the cross-sectional structure of a fiber yarn containing basalt material provided by the present invention.

[0034] In a specific embodiment provided by the present invention, optionally, the content of the polyester in the core layer is 77 parts by weight, 78 parts by weight, 79 parts by weight, 80 parts by weight, 81 parts by weight, 82 parts by weight, 83 parts by weight, 84 parts by weight or a range between any two of the above values.

[0035] In a specific embodiment provided by the present invention, the polyester is polyethylene terephthalate; the intrinsic viscosity of the polyester is preferably 0.62-0.66 dl / g, more preferably 0.64-0.66 dl / g, and even more preferably 0.66 dl / g; the melting point of the polyester is preferably 250°C-260°C, more preferably 260°C.

[0036] In a specific embodiment provided by the present invention, optionally, the content of the basalt fiber powder in the core layer is 15 parts by weight, 16 parts by weight, 17 parts by weight, 18 parts by weight, 19 parts by weight, 20 parts by weight or a range between any two of the above values.

[0037] In a specific embodiment provided by the present invention, the mesh number of the basalt fiber powder is preferably 10000-15000 mesh; optionally, the mesh number of the basalt fiber powder is 10000 mesh, 10500 mesh, 11000 mesh, 11500 mesh, 12000 mesh, 12500 mesh, 13000 mesh, 13500 mesh, 14000 mesh, 14500 mesh, 15000 mesh or a range between any two of the above values.

[0038] In a specific embodiment provided by the present invention, the density of the basalt fiber powder is preferably 2.65-3.05 g / cm 3 .

[0039] In a specific embodiment provided by the present invention, the basalt fiber powder includes SiO2 49% to 53%, Al2O3 14% to 18%, Fe2O3 10.0%·11.6%, MgO 5.0% to 9.0%, CaO 7.5% to 8.2%, and other mineral components 0.5% to 3.0%.

[0040] In a specific embodiment provided by the present invention, the content of the coupling agent in the core layer is 1 part by weight, 2 parts by weight, 3 parts by weight, or a range between any two of the above values. The coupling agent is added to the core layer to play a dispersing role. Basalt powder is an inorganic powder. In order to be evenly dispersed in the molten polyester fluid, it needs the help of a dispersant, otherwise it will agglomerate.

[0041] In a specific embodiment provided by the present invention, the coupling agent is preferably a silane coupling agent, more preferably an amino silane coupling agent, further preferably one or more of γ-aminopropyltriethoxysilane, N-(β-aminoethyl)-γ-aminopropyltriethoxysilane and N-β-(aminoethyl)-γ-aminopropylmethyldimethoxysilane, and most preferably γ-aminopropyltriethoxysilane.

[0042] According to the present invention, the fiber yarn containing basalt material includes a core layer and a skin layer wrapped outside the core layer; the mass ratio of the core layer to the skin layer is preferably (20-30): (70-80); optionally, the mass ratio of the core layer to the skin layer is 20:80, 25:75, 30:70 or a range between any two of the above ratios.

[0043] According to the present invention, the breaking strength of the fiber yarn containing basalt material is preferably greater than 2.5 cN / dtex, more preferably greater than or equal to 2.9 cN / dtex.

[0044] According to the present invention, the elongation at break of the fiber yarn containing basalt material is preferably greater than 20%.

[0045] According to the present invention, the heat preservation rate of the fiber yarn containing basalt material is preferably greater than 30%.

[0046] The present invention adds basalt fiber to polyester fiber in the form of powder material, which can give play to the low thermal conductivity of basalt fiber and improve the thermal insulation function of polyester fiber; at the same time, it overcomes the limitation that basalt inorganic fiber has high rigidity and cannot be used in the field of civilian textile clothing; and by adding basalt fiber powder to the core layer of polyester fiber, the addition amount of powder can be increased to the maximum extent, reducing the influence of the material color and fiber stiffness of the polyester fiber itself.

[0047] The present invention also provides a method for preparing the above-mentioned fiber yarn containing basalt material, comprising the following steps: S1) melt-extrude the core layer material and the skin layer material respectively to obtain a core layer melt and a skin layer melt; the core layer material comprises 77 to 84 parts by weight of polyester, 15 to 20 parts by weight of basalt fiber powder, and 1 to 3 parts by weight of a coupling agent; the skin layer material comprises polyester; S2) extrude the core layer melt and the skin layer melt through a skin-core type spinning composite component, cool and shape, oil, and wind to obtain a pre-oriented yarn POY; S3) stretch and false-twist the pre-oriented yarn POY to obtain a fiber yarn containing basalt material.

[0048] Among them, the present invention has no special restrictions on the sources of all raw materials, and they can be commercially available; the types and proportions of polyester, basalt fiber powder and coupling agent in the core layer material are the same as described above and will not be repeated here; the type of polyester in the skin layer material is the same as described above and will not be repeated here.

[0049] In a specific embodiment provided by the present invention, the basalt fiber powder is preferably prepared according to the following method: ball milling basalt fiber to obtain basalt fiber powder; the length of the basalt fiber is preferably 1-10 mm, more preferably 2-8 mm, more preferably 4-8 mm, and most preferably 6 mm; further specifically, the basalt fiber is brown and long; the moisture content of the basalt fiber is preferably less than or equal to 0.2%; the ball-to-material ratio of the ball mill is preferably (2-5):1, more preferably (3-4):1, and more preferably 3.65:1; the rotation speed of the ball mill is preferably 600-800 r / min; the ball milling time is preferably 6-8 h; the ball milling medium of the ball mill is preferably stainless steel balls.

[0050] In a specific embodiment provided by the present invention, the core layer material is preferably prepared according to the following method: 77 to 84 parts by weight of polyester, 15 to 20 parts by weight of basalt fiber powder and 1 to 3 parts by weight of a coupling agent are mixed, and the core layer material is obtained by extrusion granulation; the mixing speed is preferably 1000 to 1200 r / min; the mixing temperature is preferably 110°C to 120°C; the mixing time is preferably 25 to 30 min; the melting temperature of the extrusion granulation is preferably 260°C to 270°C; the extrusion granulation speed is preferably 200 to 250 r / min; the extrusion temperature of the extrusion granulation is preferably 270°C to 280°C; the extrusion granulation pressure is preferably 6 to 8 MPa; the speed of the pelletizer during the extrusion granulation is preferably 30 to 50 r / min, more preferably 40 r / min; the particle size of the core layer material is preferably 3 to 6 mm.

[0051] The core layer material and the skin layer material are melt-extruded to obtain a core layer melt and a skin layer melt; in the present invention, the core layer material and the skin layer material are preferably dried first and then melt-extruded; the drying temperature is preferably 110°C to 120°C; the drying time is preferably 3 to 5 hours, more preferably 3.5 to 4.5 hours, and more preferably 4 hours; the melt extrusion temperature is preferably 260°C to 290°C; the melt extrusion is preferably carried out in a screw extruder; the melt extrusion temperature control of the screw extruder is preferably divided into 5 sections, specifically, the temperatures of the first section to the fifth section are 260°C to 270°C, 270°C to 280°C, 280°C to 290°C, 280°C to 290°C, and 270°C to 280°C, respectively. Adding basalt fiber powder to the core layer of the polyester fiber yarn by melt extrusion can maximize the amount of powder added and reduce the influence of the material color and fiber stiffness of the polyester fiber itself. If the skin-core structure is not used, the entire fiber contains basalt powder material. The basalt material dispersed in the outer layer of the fiber will cause needle grinding during the sewing stage of the fabric due to the high stiffness of the material, affecting the garment process. This is also a common problem of other conventional fibers with added inorganic powders.

[0052] The core layer melt and the skin layer melt are extruded through a core-skin type spinning composite assembly, cooled, shaped, oiled, and wound to obtain a pre-oriented yarn POY; the core layer melt and the skin layer melt are preferably extruded through a core-skin type spinning composite assembly according to the mass ratio of the core layer to the skin layer; the extrusion molding temperature is preferably 275°C to 285°C, more preferably 280°C to 285°C; the cooling and shaping method is preferably side wind cooling; the wind speed for cooling and shaping is preferably 0.5 to 0.8 m / s, more preferably 0.6 to 0.8 m / s; the wind temperature for cooling and shaping is preferably 20°C to 23°C; the relative humidity for cooling and shaping is preferably 70% to 80%; the oiling rate of the oiling is preferably 0.5% to 0.8%, more preferably 0.6% to 0.8%; the winding rate is preferably 2800 to 3000 m / min.

[0053] The pre-oriented yarn POY is stretched and false-twisted to obtain a fiber yarn containing basalt material; the stretching and false-twisting deformation can be carried out according to methods well known to those skilled in the art, and in the present invention, specifically includes the following steps: the pre-oriented yarn POY is sequentially passed through a first roller, a first hot box, a false twister, a second roller, a second hot box, a third roller, oiling and winding to obtain a fiber yarn containing basalt material; more specifically, the temperature of the first hot box is preferably 180° C. to 190° C., and the first hot box is also called a deformation hot box, which heats the filaments to a plasticized state, making them easier to stretch and deform; The D / Y ratio of the false twister is preferably 1.1-1.3; the processing speed, that is, the speed of the second roller, is preferably 650-700 m / min; the drafting multiple, that is, the speed ratio of the second roller to the first roller, is preferably 1.3-1.5; the temperature of the second hot box is 130°C-150°C, and the second hot box is also called a shaping hot box, which is used to shape the processed silk strips; the second overfeed rate, that is, the speed ratio of the third roller to the second roller, is preferably 7.5%-7.8%, more preferably 7.5%-7.7%; the third overfeed rate, that is, the winding overfeed rate, is preferably 4.3%-4.6%.

[0054] The present invention also provides a fabric comprising the fiber yarn containing the basalt material.

[0055] In a specific embodiment provided by the present invention, the fabric is a knitted air layer fabric.

[0056] In another specific embodiment provided by the present invention, the fabric is a knitted sweater fabric.

[0057] In order to further illustrate the present invention, a fiber yarn containing basalt material, a preparation method thereof and an application thereof provided by the present invention are described in detail below in combination with embodiments.

[0058] The reagents used in the following examples are all commercially available.

[0059] Example 1

[0060] Fabric: 75D / 48F knitted air layer fabric (composition: 90% polyester fiber 10% spandex; weight: 230g / ㎡)

[0061] 1.1 Preparation of masterbatch

[0062] The basalt fiber was ground by ball milling process to prepare 12500 mesh basalt fiber powder material. The grinding parameters were as follows: grinding time 8h, ball-to-material ratio 3.65:1, ball milling speed 650r / min, and the grinding ball material was stainless steel ball.

[0063] According to the mass percentage, 78 parts of polyester (PET) chips, 20 parts of basalt fiber powder, and 2 parts of coupling agent were added to a high-speed mixer with a speed of 1200r / min, the mixing temperature was 110℃, and the mixing was carried out for 30 minutes. The mixed materials were added to the screw machine and melted at a temperature of 270℃, and the screw speed was 250r / min. The molten polyester material was extruded through the wire drawing machine head, and the extrusion temperature was controlled at 280℃ and the wire drawing machine head pressure was 8MPa. After cooling through the cold water tank, it entered the pelletizer and was cut into granules. The pelletizer speed was 40r / min, and the particle size was about 6mm.

[0064] Polyester (PET) chips: spinning grade, white, intrinsic viscosity 0.66, melting point 260℃, Yizheng Chemical Fiber.

[0065] Basalt fiber: fiber length 6mm, brown, long strip, density 2.65~3.05g / cm 3 , water content ≤0.2%, main components: SiO2 (49%~53%), Al2O3 (14%~18%), Fe2O3 (10.0%~11.6%), MgO (5.0%~9.0%), CaO (7.5%~8.2%), other mineral components (0.5%~3.0%), Hubei Huierjie.

[0066] Coupling agent: γ-aminopropyltriethoxysilane, model KH-550, colorless transparent liquid, molecular weight 221.37, Dow Corning.

[0067] 1.2 Fiber preparation

[0068] The prepared basalt polyester masterbatch and conventional polyester (PET) chips were mixed in a mass ratio of 30:70 to serve as the core material of the fiber. In addition, conventional polyester (PET) chips were used as the sheath material of the fiber.

[0069] 1) Add the above fiber skin material into the first screw extruder, and melt-extrude it into a melt after drying as the skin component. Add the above fiber core material into the second screw extruder, and melt-extrude it into a melt after drying as the core component. Wherein, the drying temperature is 120℃; the drying time is 4h. The temperature control of the melt extrusion process of the screw extruder is divided into 5 sections, and the temperatures of the first to fifth sections are: 260℃~270℃, 270℃~280℃, 280℃~290℃, 280℃~290℃, 270℃~280℃ respectively.

[0070] 2) The skin layer component and the core layer component of the above step 1) are uniformly extruded through a skin-core type spinning composite assembly with a skin / core mass ratio of 60 / 40, and then cooled, oiled, and wound by side wind to obtain a skin-core composite fiber pre-oriented yarn POY.

[0071] The spinning box temperature was 285°C; the side wind conditions were: wind speed 0.8 m / s, wind temperature 20°C, relative humidity 70%; oiling rate: 0.8%; winding speed: 3000 m / min.

[0072] 3) The pre-oriented yarn POY obtained in the above step 2) is subjected to the following steps: pre-oriented yarn - yarn guide - first roller - first heat box - false twister - second roller - second heat box - third roller - oiling - winding to obtain the final finished product DTY winding yarn.

[0073] Among them, the processing speed is 680m / min; the drafting multiple is 1.5; the false twister D / Y ratio is 1.3; the first hot box temperature is 190°C; the second hot box temperature is 150°C; the second overfeed rate is 7.5%; and the third overfeed rate is 4.3%.

[0074] The properties of the obtained DTY winding yarn are as follows: breaking strength 2.9 cN / dtex, breaking elongation 20.36%.

[0075] The above-mentioned DTY winding yarn was woven by a knitting circular machine to obtain a knitted air layer fabric (comparative sample composition: 90% polyester fiber 10% spandex; gram weight: 230g / ㎡), and the fabric was tested. The results are shown in Table 1.

[0076] Table 1 Performance test results of knitted air layer fabrics

[0077]

[0078] Test method:

[0079] Test methods for breaking strength and elongation at break: GB / T 3923.1-2013 Tensile properties of textile fabrics Part 1: Determination of breaking strength and elongation at break (strip method);

[0080] Far infrared emissivity and far infrared radiation temperature rise adopt GB / T 30127-2013 "Testing and evaluation of far infrared performance of textiles";

[0081] The thermal insulation rate adopts GB / T 35762-2017 "Test method for heat transfer performance of textiles-Flat plate method".

[0082] Example 2

[0083] Fabric: 100D / 144F knitted sweater fabric (95% polyester, 5% spandex, weight 260g / ㎡)

[0084] 2.1 Preparation of masterbatch

[0085] The basalt fiber was ground by ball milling process to prepare 12500 mesh basalt fiber powder material. The grinding parameters were as follows: grinding time 8h, ball-to-material ratio 3.65:1, ball milling speed 650r / min, and the grinding ball material was stainless steel ball.

[0086] According to the mass percentage, 82 parts of polyester (PET) chips, 15 parts of basalt fiber powder, and 3 parts of coupling agent were added to a high-speed mixer with a speed of 1100r / min, the mixing temperature was 120℃, and the mixing was carried out for 30 minutes. The mixed materials were added to the screw machine and melted at a temperature of 280℃, and the screw speed was 240r / min. The molten polyester material was extruded through the wire drawing machine head, and the extrusion temperature was controlled at 270℃ and the wire drawing machine head pressure was 7.5MPa. After cooling through the cold water tank, it entered the pelletizer and was cut into granules. The pelletizer speed was 40r / min, and the particle size was about 6mm.

[0087] Polyester (PET) chips: spinning grade, white, intrinsic viscosity 0.66, melting point 260℃, Yizheng Chemical Fiber.

[0088] Basalt fiber: fiber length 6mm, brown, long strip, density 2.65~3.05g / cm 3 , water content ≤0.2%, main components: SiO2 (49%~53%), Al2O3 (14%~18%), Fe2O3 (10.0%~11.6%), MgO (5.0%~9.0%), CaO (7.5%~8.2%), other mineral components (0.5%~3.0%), Hubei Huierjie.

[0089] Coupling agent: γ-aminopropyltriethoxysilane, model KH-550, colorless transparent liquid, molecular weight 221.37, Dow Corning.

[0090] 2.2 Fiber preparation

[0091] The prepared basalt polyester masterbatch was mixed with conventional polyester (PET) chips in a mass ratio of 20:80 to serve as the core material of the fiber. In addition, conventional polyester (PET) chips were used as the sheath material of the fiber.

[0092] 1) Add the above fiber skin material into the first screw extruder, and melt-extrude it into a melt after drying as the skin component. Add the above fiber core material into the second screw extruder, and melt-extrude it into a melt after drying as the core component. Wherein, the drying temperature is 120℃; the drying time is 4h. The temperature control of the melt extrusion process of the screw extruder is divided into 5 sections, and the temperatures of the first to fifth sections are: 260℃~270℃, 270℃~280℃, 280℃~290℃, 280℃~290℃, 270℃~280℃ respectively.

[0093] 2) The skin layer component and the core layer component of the above step 1) are uniformly extruded through a skin-core type spinning composite assembly with a skin / core mass ratio of 60 / 40, and then cooled, oiled, and wound by side wind to obtain a skin-core composite fiber pre-oriented yarn POY.

[0094] The spinning box temperature was 280°C; the side wind conditions were: wind speed 0.6 m / s, wind temperature 23°C, relative humidity 80%; oiling rate: 0.6%; winding speed: 2800 m / min.

[0095] 3) The pre-oriented yarn POY obtained in the above step 2) is subjected to the following steps: pre-oriented yarn - yarn guide - first roller - first heat box - false twister - second roller - second heat box - third roller - oiling - winding to obtain the final finished product DTY winding yarn.

[0096] Among them, the processing speed is 700m / min; the drafting multiple is 1.3; the false twister D / Y ratio is 1.1; the first hot box temperature is 180°C; the second hot box temperature is 140°C; the second overfeed rate is 7.7%; and the third overfeed rate is 4.6%.

[0097] The properties of the obtained DTY winding yarn are as follows: breaking strength 3.8 cN / dtex, breaking elongation 23.53%.

[0098] The above-mentioned DTY winding yarn was woven by a knitting circular machine to obtain a knitted sweater fabric (comparative sample composition: 95% polyester fiber 5% spandex; gram weight: 260g / ㎡), and the fabric was tested. The fabric is shown in Table 2.

[0099] Table 2 Performance test results of knitted sweater fabrics

[0100]

[0101] Test method:

[0102] Test methods for breaking strength and elongation at break: GB / T 3923.1-2013 Tensile properties of textile fabrics Part 1: Determination of breaking strength and elongation at break (strip method);

[0103] Far infrared emissivity and far infrared radiation temperature rise adopt GB / T 30127-2013 "Testing and evaluation of far infrared performance of textiles";

[0104] The thermal insulation rate adopts GB / T 35762-2017 "Test method for heat transfer performance of textiles-Flat plate method".

[0105] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A fiber yarn containing basalt material, characterized in that: It includes a core layer and a skin layer wrapped outside the core layer; The core layer comprises 77 to 84 parts by weight of polyester, 15 to 20 parts by weight of basalt fiber powder, and 1 to 3 parts by weight of coupling agent; The skin layer comprises polyester.

2. The fiber yarn according to claim 1, characterized in that The mass ratio of the core layer to the skin layer is (20-30):(70-80).

3. The fiber yarn according to claim 1, characterized in that The polyester is polyethylene terephthalate; The intrinsic viscosity of the polyester is 0.62 to 0.66 dl / g; The melting point of the polyester is 250°C to 260°C.

4. The fiber yarn according to claim 1, characterized in that The mesh number of the basalt fiber powder is 10000-15000 mesh; The density of the basalt fiber powder is 2.65-3.05 g / cm 3 ; The basalt fiber powder comprises SiO2 49% to 53%, Al2O3 14% to 18%, Fe2O3 10.0% to 11.6%, MgO 5.0% to 9.0%, CaO 7.5% to 8.2%, and other mineral components 0.5% to 3.0%.

5. The fiber yarn according to claim 1, characterized in that The coupling agent is a silane coupling agent.

6. The fiber yarn according to claim 1, characterized in that The breaking strength of the fiber yarn containing basalt material is greater than 2.5 cN / dtex; The elongation at break of the fiber yarn containing basalt material is greater than 20%; The heat preservation rate of the fiber yarn containing basalt material is greater than 30%.

7. A method for preparing fiber yarn containing basalt material according to claim 1, characterized in that: The following steps are involved: S1) melt-extrude the core layer material and the skin layer material to obtain a core layer melt and a skin layer melt; the core layer material comprises 77-84 parts by weight of polyester, 15-20 parts by weight of basalt fiber powder, and 1-3 parts by weight of a coupling agent; the skin layer material comprises polyester; S2) extruding the core layer melt and the skin layer melt through a core-skin type spinning composite assembly, cooling and shaping, oiling, and winding to obtain a pre-oriented yarn POY; S3) stretching and false twisting the pre-oriented yarn POY to obtain a fiber yarn containing basalt material.

8. The preparation method according to claim 7, characterized in that: The temperature of the melt extrusion in step S1) is 260°C to 290°C; The extrusion molding temperature in the step S2) is 275°C to 285°C; the cooling and shaping method is side wind cooling; the wind speed of the cooling and shaping is 0.5 to 0.8 m / s; the wind temperature of the cooling and shaping is 20°C to 23°C; the relative humidity of the cooling and shaping is 70% to 80%; the oiling rate of the oiling is 0.5% to 0.8%; and the winding rate is 2800 to 3000 m / min.

9. The preparation method according to claim 7, characterized in that: The step S3) specifically includes: passing the pre-oriented yarn POY through a first roller, a first heat box, a false twister, a second roller, a second heat box, a third roller, oiling and winding and shaping in sequence to obtain a fiber yarn containing basalt material; The processing speed is 650-700 m / min; the drafting multiple is 1.3-1.5; the D / Y ratio of the false twister is 1.1-1.3; the temperature of the first hot box is 180°C-190°C; the temperature of the second hot box is 130°C-150°C; the second overfeed rate is 7.5%-7.8%; and the third overfeed rate is 4.3%-4.6%.

10. A fabric, comprising the fiber yarn containing basalt material according to any one of claims 1 to 6 or the fiber yarn containing basalt material prepared by any one of the preparation methods of claims 7 to 9.

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