CN104862811B - A kind of production method of functional nylon 6 fiber - Google Patents

Abstract

The invention discloses a production method of functional nylon-6 fiber, which comprises the following steps: a. drying the functional master batches by using a master batch drying device, wherein the master batch drying device comprises a master batch tank for containing the functional master batches, and in the drying process, the master batch tank is provided with two strands of hot air which are blown from bottom to top and blown from the center to the outside to dry the functional master batches, and the functional master batches are stirred and dried by blowing at the same time; b. melting and extruding by a screw extruder; c. spinning and oiling; d. pre-netting, drafting, netting, winding; e. and (6) inspecting and packaging. The nylon-6 fiber prepared by the method has specific functions, such as antibacterial, flame retardant, ultraviolet ray or radiation resistant functions, and strong market competitiveness, and the functional master batch added into the nylon-6 slices is dried fully and uniformly, so that the overall difference of the nylon-6 fiber is small, and the product quality is improved.

Description

A kind of production method of functional nylon 6 fiber

technical field

The present invention relates to a kind of furniture, especially a kind of production method of functional nylon 6 fiber.

Background technique

The main species of nylon is aliphatic polyamide fiber, which can be synthesized from a monomer, such as lactam or amino acid. At this time, the Arabic numerals after the name of nylon indicate the number of carbon atoms of the lactam or amino acid used, such as nylon 6, nylon 66, etc. Nylon 6 is polycaprolactam fiber. The 412th page of the "Chemical Fiber Dictionary" printed in the second edition of the first edition in 1995 disclosed this concept: polycaprolactam fiber is referred to as polycaprolactam fiber in my country. Filament, textured filament and short fiber, etc., are produced by melt direct spinning or chip spinning. Nylon 6 products have the characteristics of high strength, wear resistance, softness and mild skin touch. They have broad applications in the fields of clothing, silk, umbrellas, fishnet yarns, cord yarns, carpet yarns and engineering plastics. Therefore, they belong to the domestic chemical fiber production enterprises. The mainstream variety, nylon fabric is also the most common fabric on the market.

Functional nylon 6 fiber makes nylon 6 fiber have specific functions by mixing functional masterbatches in the functional film, such as adding antibacterial masterbatch, flame retardant masterbatch, anti-ultraviolet masterbatch or anti-radiation masterbatch to make nylon 6 fiber antibacterial , flame retardant, anti-ultraviolet or anti-radiation functions, due to killing two birds with one stone, the market demand for functional nylon 6 fibers is increasing. In the production process, functional masterbatches are dried by masterbatch drying devices. Existing masterbatch drying devices such as China Like the new masterbatch drying device disclosed in patent 201420183442.X, there is only dry hot air blowing from bottom to top in the masterbatch tank, which does not fully and unevenly dry the functional masterbatch, which affects product quality. Due to such problems, it is necessary to improve the existing production method and device of functional nylon 6 fibers.

Contents of the invention

The object of the present invention is to solve the deficiency of above-mentioned technology and design a kind of production method of functional nylon 6 fiber that masterbatch is dried fully and uniformly, the nylon 6 fiber that adopts this method to make has specific function.

A kind of production method of functional nylon 6 fiber designed by the present invention comprises the steps:

a. The step of drying the functional masterbatch using a masterbatch drying device, wherein the masterbatch drying device includes a masterbatch tank for holding the functional masterbatch. During the drying process, the masterbatch tank has a function from bottom to top Blowing, two streams of hot air blowing from the center to the outside to dry the functional masterbatch, the functional masterbatch is stirred and blown dry at the same time;

b. Uniformly mixing the dried nylon 6 slices with the dried functional masterbatch obtained in step a, and then adding the mixture to a screw extruder for melt extrusion;

c. Transport the fully melted mixed melt to the spinning box, extrude the melt into the spinning assembly with a constant amount through the metering pump for spinning, and then use side blowing or surrounding blowing to cool and shape the filament bundle , and then oil the cooled tow;

d. Pre-network the oiled tow through the tunnel and the wire gate, then draft the tow with cold rollers and hot rollers, add the drawn tow to the network, and then guide the tow into the winding drum The tube is wound into a tube at high speed;

e. Check the packaging.

As a further improvement of the above scheme: the functional masterbatch in the step a is an antibacterial masterbatch, a flame retardant masterbatch, an anti-ultraviolet masterbatch or an anti-radiation masterbatch; the heating zone of the screw extruder in the step b There are six, and the temperature is 260-262°C in the first zone, 265-268°C in the second zone, 265-268°C in the third zone, 265-268°C in the fourth zone, 265-268°C in the fifth zone, and 265-268°C in the sixth zone. The body pressure is 11.0-12.0MPa; the fully melted mixed melt in the step c is transported to the spinning box through the heat preservation pipeline, and the temperature of the spinning box is 263-270°C; the side blowing temperature is 18-20°C, the humidity 65% to 80%; the amount of oil applied is 1.0 to 1.2%;: in the step d, the drafting is first carried out with two cold rolls, and then two hot rolls are used for drafting, and the temperature of the hot rolls is 145 to 175 ℃, the drafting speed is 1.1~1.2; the winding speed for high-speed winding into a drum is 4000~4200m/min.

As a further improvement of the above scheme: the anti-radiation masterbatch includes 0.1 part of nickel sulfate, 0.1 part of copper sulfate, 0.3 part of sodium silver zirconium phosphate, 1 part of barium sulfate, 1 part of dispersant, 10 parts of dye and 87.5 parts of nylon 6 chips.

As a further improvement of the above scheme: the masterbatch drying device used in step a includes a masterbatch tank with a conical bottom, the upper part of the masterbatch tank is provided with an exhaust pipe, the lower part is provided with an air inlet pipe, and the bottom is provided with an outlet pipe There is a heater on the feed pipe, an air inlet pipe, a discharge valve on the discharge pipe, a conical net at the bottom of the masterbatch tank, and a support between the conical net and the inner wall of the masterbatch tank. The drying device also includes a motor, a reducer, a first gear, a second gear, a third gear, a fourth gear, a fifth gear, an upper bearing seat, a lower bearing seat, a fixed rod, a first stirring rod, a second stirring rod, Compressed air pipe and pressure tank; the second stirring rod is a hollow tubular structure, the upper half of the first stirring rod has a hollow structure, and the bottom has a thickened section, and the thickened section is provided with a triangular stirring blade ; the first stirring rod passes through the second stirring rod and the top of the first stirring rod is higher than the second stirring rod, and a gas blocking ring with a gap with the first stirring rod is also clamped on the upper part of the inner wall of the second stirring rod, and the first stirring rod There are three sets of upper, middle and lower bearings between the first stirring rod and the second stirring rod; the upper bearing seat is set in the center of the top of the masterbatch tank, the lower bearing seat is set in the middle of the fixed rod, and the fixed rod is fixedly installed in the masterbatch tank At the middle and lower part, the second stirring rod passes through the upper bearing seat and the lower bearing seat, and bearings are arranged between the upper bearing seat, the lower bearing seat and the second stirring rod; the bottom surface of the upper bearing seat has an inner convex ring, a top It has an annular upper cover, the top of the lower bearing seat has an annular upper cover, and the bottom has an annular lower cover; the second stirring rod is provided with a spiral stirring blade, and the triangular stirring blade is located at the lower part of the fixed rod; the One end of the compressed air tube is connected to a pressure tank, and the other end is inserted into the hollow structure of the first stirring rod. The pressure tank is connected to an air source and has a heating jacket outside; the middle part of the first stirring rod is provided with The large air outlet connected to its internal hollow structure is covered with small air outlets on the second stirring rod; the motor is arranged on the top of the masterbatch tank and is connected to the reducer in transmission, and the first gear is connected to the reducer in transmission , the fourth gear is located at the top of the first stirring rod, the fifth gear is located at the top of the second stirring rod, and the first stirring rod also passes through the fifth gear; the first gear meshes with the second gear ; The second gear meshes with the third gear and the fifth gear at the same time, and the third gear meshes with the fourth gear; the workshop air enters from the air inlet pipe and is heated by the heater, and the formed hot air flows from the masterbatch tank The bottom blows up to form the hot air blowing from bottom to top; the compressed air in the compressed air tank is heated by the heating jacket to form hot compressed air, and the hot compressed air passes through the compressed air pipe, the internal hollow structure of the first stirring rod, After the large air outlet and the air outlet are blown outward to form the hot air blowing from the center outward; the motor drives the first gear to rotate through the reducer, and the first gear drives the fifth gear to rotate through the meshing of the second gear on the one hand. The fifth gear drives the second stirring rod to rotate to form stirring. In addition, the first gear drives the fourth gear to rotate through the second gear and the third gear, and the fourth gear drives the first stirring rod to rotate to form stirring. The spiral on the second stirring rod The rotation direction of the stirring blade is opposite to that of the triangular stirring blade on the first stirring rod.

As a further improvement of the above scheme: in step c, the ring blowing spinning cooling device is used to cool the tow by ring blowing. The ring blowing is divided into upper and lower layers and is independent of each other. The ring blowing is the main body, and it is blown out horizontally from the ring blowing tube, and the temperature and temperature of the upper ring blowing are lower than that of the lower ring blowing.

The production method of the functional nylon 6 fiber designed by the present invention has the beneficial effect that the nylon 6 fiber prepared by this method has specific functions, such as having antibacterial, flame retardant, anti-ultraviolet or anti-radiation functions, The market competitiveness is strong, and the functional masterbatch added to the nylon 6 chips is fully and uniformly dried, so that the overall difference of the nylon 6 fibers is small and the product quality is improved.

Description of drawings

Fig. 1 is the structural representation of the masterbatch drying device that produces the used functional nylon 6 fiber of the present invention;

Fig. 2 is the enlarged view of place A in Fig. 1;

Fig. 3 is the enlarged view of place B in Fig. 1;

Figure 4 is an enlarged view at C in Figure 1;

Fig. 5 is the structural representation of ring blowing device in the ring blowing spinning cooling device that embodiment 6 adopts;

Fig. 6 is an enlarged view of place A in Fig. 5;

Fig. 7 is the system schematic diagram of the air conditioning unit in the ring blow spinning cooling device adopted in embodiment 6;

Fig. 8 is the improved schematic view of the ring blowing device in the ring blowing spinning cooling device adopted in embodiment 6;

Fig. 9 is an enlarged view of the first outer cylinder part shown in Fig. 8;

Figure 10 is an enlarged view at B in Figure 9;

Fig. 11 is the schematic diagram of another kind of stepper motor driving structure in embodiment 6;

Fig. 12 is a schematic structural view of the masterbatch drying device in Example 7.

detailed description

The present invention will be further described below with reference to the accompanying drawings.

Example 1:

The production method of the functional nylon 6 fiber described in the present embodiment comprises the steps:

a. The step of drying the functional masterbatch using a masterbatch drying device, wherein the masterbatch drying device includes a masterbatch tank for holding the functional masterbatch. During the drying process, the masterbatch tank has a function from bottom to top Blowing, two streams of hot air blowing from the center to the outside to dry the functional masterbatch, the functional masterbatch is stirred and blown dry at the same time;

b. Uniformly mix the dried nylon 6 slices with the dried functional masterbatch obtained in step a, and then add the mixture to a screw extruder for melt extrusion; wherein, the nylon 6 slices and the functional masterbatch The matching ratio belongs to the prior art, and the general functional masterbatch is 3%-5% of the weight of nylon 6 slices;

c. Transport the fully melted mixed melt to the spinning box, extrude the melt into the spinning assembly with a constant amount through the metering pump for spinning, and then use side blowing or surrounding blowing to cool and shape the filament bundle , and then oil the cooled tow;

d. Pre-network the oiled tow through the tunnel and the wire gate, then draft the tow with cold rollers and hot rollers, add the drawn tow to the network, and then guide the tow into the winding drum The tube is wound into a tube at high speed;

e. Check the packaging.

Wherein: the functional masterbatch in the step a is an antibacterial masterbatch; the heating zone of the screw extruder in the step b is six, and the temperature is 260°C in the first zone, 265°C in the second zone, and 265°C in the third zone. ℃, 265°C in the fourth zone, 265°C in the fifth zone, and 265°C in the sixth zone, and the melt pressure is 11.0MPa; the fully melted mixed melt in the step c is transported to the spinning box through the insulation pipeline, and the temperature of the spinning box is The temperature is 263°C; the side blowing temperature is 18°C, the humidity is 65%%; the oiling amount is 1.0%; in the step d, the drafting is first carried out with two cold rolls, and then two hot rolls are used for drafting , the temperature of the hot roll is 145°C, the drafting speed is 1.1; the winding speed for high-speed winding into a drum is 4000m/min.

The nylon 6 fiber prepared by this method has antibacterial function.

What this embodiment adopts is the masterbatch drying device independently developed by our company. Its specific structure is shown in Figures 1 to 4. It includes a conical masterbatch tank 201 at the bottom, and an exhaust gas is provided on the top of the masterbatch tank 201. Pipe 202, the lower part is provided with air inlet pipe 203, the bottom is provided with discharge pipe 204, the heater 205 is provided on the air inlet pipe 203, the discharge valve 206 is provided on the discharge pipe 204, and the bottom of masterbatch tank 201 is provided with A conical net 207, a support body 208 is arranged between the conical net 207 and the inner wall of the masterbatch tank 201, and the masterbatch drying device also includes a motor 209, a reducer 210, a first gear 211, a second gear 212, and a third gear 213 , the fourth gear 214, the fifth gear 215, the upper bearing seat 216, the lower bearing seat 217, the fixed rod 218, the first stirring rod 219, the second stirring rod 220, the compressed air pipe 221 and the pressure tank 222; The second stirring rod 220 is a hollow tubular structure, the first half of the first stirring rod 219 has a hollow structure 223, and the bottom has a thickening section 224, and the thickening section 224 is provided with a triangular stirring blade 225; the first stirring rod 219 passes through the second stirring rod 220 and the top of the first stirring rod 219 is higher than the second stirring rod 220, and a gas blocking ring 227 with a gap with the first stirring rod 219 is also clamped on the upper part of the inner wall of the second stirring rod 220 , between the first stirring rod 219 and the second stirring rod 220, there are three sets of upper, middle and lower bearings 226; the upper bearing seat 216 is located in the center of the top of the masterbatch tank 201, and the lower bearing seat 217 is located in the middle of the fixed rod 218, The fixed rod 218 is fixedly installed in the middle and lower part of the masterbatch tank 201, the second stirring rod 220 passes through the upper bearing seat 216 and the lower bearing seat 217, between the upper bearing seat 216, the lower bearing seat 217 and the second stirring rod 220 All are provided with bearings 226; the bottom surface of the upper bearing seat 216 has an inner convex ring 228, and the top has an annular upper cover 229, and the top of the lower bearing seat 217 has an annular upper cover 229, and the bottom has an annular lower cover 230; The second stirring rod 220 is provided with a spiral stirring blade 231, and the triangular stirring blade 225 is located at the bottom of the fixed rod 218; one end of the compressed air pipe 221 is connected to the pressure tank 222, and the other end is inserted into the first stirring rod 219 In the hollow structure 223, the depressurized tank 222 is connected to an air source and a heating jacket 232 is provided outside; the middle part of the first stirring rod 219 is provided with a large air outlet 233 communicating with its internal hollow structure 223, and in the second The stirring rod 220 is covered with small air outlet holes 234; the motor 209 is arranged on the top of the masterbatch tank 201 and is connected in transmission with the reducer 210, the first gear 211 is connected in transmission with the reducer 210, and the fourth gear 214 is located at the top of the first stirring rod 219, the fifth gear 215 is located at the top of the second stirring rod 220, and the first stirring rod 219 also passes through the fifth gear 215; the first gear 211 and the second gear 212 mesh; the second gear 212 is simultaneously with the third gear 213 and the fifth The gear 215 is engaged, and the third gear 213 is engaged with the fourth gear 214; the workshop air enters from the air inlet pipe 203 and is heated by the heater 205, and the formed hot air is blown upward from the bottom of the masterbatch tank 201 to form the Hot air blowing from bottom to top; the compressed air in the pressure tank 222 is heated by the heating jacket 232 to form hot compressed air, and the hot compressed air passes through the compressed air pipe 221, the internal hollow structure 223 of the first stirring rod 219, and the large air outlet 233 and the air outlet 234 are blown outward to form the hot air blowing outward from the center; the motor 209 drives the first gear 211 to rotate through the reducer 210, and the first gear 211 drives the fifth gear 212 through the meshing of the second gear 212 on the one hand. The gear 215 rotates, the fifth gear 215 drives the second stirring rod 220 to rotate to form stirring, in addition, the first gear 211 drives the fourth gear 214 to rotate through the second gear 212 and the third gear 213, and the fourth gear 214 drives the first stirring rod The rotation of 219 also forms agitation. The helical stirring blade 231 on the second stirring rod 220 is opposite to the rotation direction of the triangular stirring blade 225 on the first stirring rod 219. On the contrary, it is realized because of the following reasons, because the first gear 211 drives the first stirring A third gear 213 is added in the process of the rod 219, so the first stirring rod 219 and the second stirring rod 220 are rotated oppositely.

In this masterbatch drying device specially developed by our company, due to its structural characteristics, the first stirring rod 219 and the second stirring rod 220 can be effectively fixed, making the overall structure more firm, and making the first stirring rod 219 and the second stirring rod 220 can produce relative motion to produce the required stirring in different directions. During production, the drying process is as follows: first, the air is fed through the air inlet pipe 203, and the wind is heated by the heating jacket 232 to form hot air. Blow out from the bottom of the master batch tank 201, the conical net 207 matched with its shape at the bottom of the master batch tank 201 separates the master batch in the master batch tank 201 from its bottom wall (0.5 cm in general), so that the The wind blown out by 203 is subject to less resistance, and can better enter the masterbatch tank 201 and blow from bottom to top. The first stirring rod 219 drives the triangular stirring blade 225 to rotate, so that the masterbatch accumulated on the conical net 207 is loosened. , so that the wind blown out of the air inlet pipe 203 is easier to blow upwards, and the masterbatch in the masterbatch tank 201 is dried. Second, the compressed air in the decompression tank 222 is heated by the heating jacket 232 to form hot compressed air. The compressed air is blown outwards through the compressed air pipe 221, the internal hollow structure 223 of the first stirring rod 219, the large air outlet hole 233 and the air outlet hole 234 to form the hot air blown outward from the center; and the second stirring rod 220 is rotating During the process, the spiral stirring blade 231 transports the masterbatch in the masterbatch tank 201 from bottom to top, which plays a role of tumbling. During the tumbling process, the second stirring rod 220 blows air around the body to further dry the masterbatch, so that the masterbatch During the whole stirring process, the second stirring rod 220 draws up the masterbatch from the center, and the masterbatch close to the inner wall of the masterbatch tank 201 pours in from the outside to the center of the bottom, so that all the masterbatch inside The material is in a moving state and can be fully dried. Since the spiral stirring blade 231 and the triangular stirring blade 225 move in opposite directions, the masterbatch carried by the triangular stirring blade 225 enters the spiral stirring blade 231 smoothly, thereby improving the speed of the spiral stirring blade. 231 to convey the efficiency of the masterbatch upwards; this method not only improves the drying effect of the masterbatch significantly, but also significantly improves the uniformity, which is suitable for production. In order to increase the temperature of the compressed air, an electric heating jacket can also be provided outside the compressed air pipe 221 .

In this embodiment, the antibacterial masterbatch can be purchased from the market.

Example 2:

The production method of the functional nylon 6 fiber described in this embodiment differs from Example 1 in that: the functional masterbatch described in step a is a flame-retardant masterbatch, and the nylon 6 fiber prepared by this method is Fiber has flame retardant function.

In this example, the flame retardant masterbatch can be purchased from the market, or the flame retardant masterbatch specially developed by our company can be used, and the flame retardant masterbatch can be prepared according to the following steps:

1. Use phosphorus-based or nitrogen-based aromatic polyamide organic amine compounds as flame retardants to make functional powders;

2. Put the functional powder into an oven and dry and activate it at a temperature of 175°C;

3. The functional powder obtained in step 2 is mixed with nylon 6 slices, dispersant (polymer wax), heat stabilizer C101, and antioxidant B215, wherein each component is calculated by weight: 19.5 parts of functional powder, 80 parts of nylon 6 chips, 0.2 part of dispersant, 0.2 part of antioxidant, 0.1 part of heat stabilizer;

4. Stir and mix the mixture obtained in step 3;

5. Cool the mixture obtained in step 4 to 15°C to 25°C, and then feed it into a screw extruder for granulation, wherein the temperature of the screw extruder is 280°C, and the melt pressure is 5-6 MPa.

The nylon 6 fiber produced by this flame-retardant masterbatch has a better flame-retardant effect.

Example 3:

The production method of the functional nylon 6 fiber described in this embodiment is different from Example 1 in that the nylon 6 fiber it makes has an anti-ultraviolet function, and the specific difference is that the functional masterbatch described in the step a It is an anti-ultraviolet masterbatch; the heating zone of the screw extruder in the step b is six, and its temperature is 262°C in the first zone, 268°C in the second zone, 268°C in the third zone, 268°C in the fourth zone, 268°C in the fifth zone, The sixth zone is 268°C, and the melt pressure is 12.0MPa; the fully melted mixed melt in the step c is transported to the spinning box through the heat preservation pipeline, and the temperature of the spinning box is 270°C; the side blowing temperature is 20°C, and the humidity 80%; the amount of oiling is 1.2%;: the drawing in the step d first adopts two cold rolls for drafting, and then uses two hot rolls for drafting. The temperature of the hot rolls is 175 ° C, and the drafting speed is 1.2 ; The winding speed of high-speed winding into drum is 4200m/min.

In this embodiment, the anti-ultraviolet masterbatch can be purchased from the market. It can also be our company's special anti-ultraviolet masterbatch, which includes 2 parts of sodium zirconium phosphate, 0.5 part of dispersant (polymer wax) and 97.5 parts of nylon 6 chips (all of which are parts by weight).

Example 4:

The production method of the functional nylon 6 fiber described in this example differs from that of Example 1 in that the nylon 6 fiber produced by it has anti-radiation function, and the specific difference is that the functional precursor described in the step a The grain is anti-radiation masterbatch; the heating zone of the screw extruder in the step b is six, and its temperature is 261°C in the first zone, 267°C in the second zone, 267°C in the third zone, 267°C in the fourth zone, and 267°C in the fifth zone 267°C in the sixth zone, and the melt pressure is 11.5MPa; the fully melted mixed melt in the step c is transported to the spinning box through the heat preservation pipeline, and the temperature of the spinning box is 267°C; the side blowing temperature is 19°C, The humidity is 70%; the oiling amount is 1.1%;: in the step d, drafting first adopts two cold rolls for drafting, and then adopts two hot rolls for drafting. The temperature of the hot rolls is 160°C, and the drafting speed is 1.15; The winding speed of high-speed winding into a drum is 4100m/min.

In this embodiment, the anti-radiation masterbatch can be purchased from the market, or the following scheme can be adopted: the anti-radiation masterbatch includes 0.1 part of nickel sulfate, 0.1 part of copper sulfate, and 0.3 part of sodium zirconium phosphate in parts by weight Silver, 1 part of barium sulfate, 1 part of dispersant (low molecular weight polyethylene wax), 97.5 parts of nylon 6 chips.

Example 5:

The production method of the functional nylon 6 fiber described in this embodiment is different from Example 4 in that the nylon 6 fiber it makes is a colored yarn with anti-radiation function: the anti-radiation masterbatch is by weight Including 0.1 parts of nickel sulfate, 0.1 parts of copper sulfate, 0.3 parts of sodium silver zirconium phosphate, 1 part of barium sulfate, 1 part of dispersant (low molecular weight polyethylene wax), 10 parts of dyes and 87.5 parts of nylon 6 slice.

Each functional nylon 6 fiber detection parameter that above-mentioned embodiment makes is as follows table:

Example 6

The production method of the functional nylon 6 fiber described in this example is different from Example 1 in that it adopts the cooling of the surrounding air, and adopts the cooling device of the surrounding air spinning developed by our company.

Its production method comprises the following steps:

a. The step of drying the functional masterbatch using a masterbatch drying device, wherein the masterbatch drying device includes a masterbatch tank for holding the functional masterbatch. During the drying process, the masterbatch tank has a function from bottom to top Blowing, two streams of hot air blowing from the center to the outside to dry the functional masterbatch, the functional masterbatch is stirred and blown dry at the same time;

b. Uniformly mixing the dried nylon 6 slices with the dried functional masterbatch obtained in step a, and then adding the mixture to a screw extruder for melt extrusion;

c. Transport the fully melted mixed melt to the spinning box, extrude the melt into the spinning assembly with a constant amount through the metering pump for spinning, and then use the surrounding air to cool and shape the filament bundle, and then The cooled tow is oiled; in this step, the ring blowing spinning cooling device is used to cool the tow by ring blowing. The ring blowing is divided into upper and lower layers and is independent of each other. The upper layer of ring blowing is blown out obliquely upwards. The lower ring air is the main body, and it is blown out horizontally from the ring blower, and the temperature and temperature of the upper ring air are lower than the lower ring air.

d. Pre-network the oiled tow through the tunnel and the wire gate, then draft the tow with cold rollers and hot rollers, add the drawn tow to the network, and then guide the tow into the winding drum The tube is wound into a tube at high speed;

e. Check the packaging.

The specific parameters are six heating zones of the screw extruder in the step b, and the temperature is 262°C in the first zone, 268°C in the second zone, 268°C in the third zone, 268°C in the fourth zone, 268°C in the fifth zone, and 268°C in the sixth zone. °C, the melt pressure is 12.5MPa; the temperature of the spinning box in the step b is 270 °C; the temperature of the upper ring blowing in the step c is 19.5 °C, the speed is 0.5m/s, the humidity is 78%, and the lower ring blowing The temperature is 20°C, the velocity is 0.5m/s, and the humidity is 80%. In the step d, the drafting is first carried out by two cold rolls, and then by two hot rolls, the temperature of the hot rolls is 170°C, the drafting speed is 1.1; the winding speed is 4200m/min

Wherein, as shown in Figures 6, 7, and 8, the company's special ring blowing spinning cooling device for producing nylon 6 fibers that this embodiment adopts includes a ring blowing device 101 and an air conditioning unit 102, and the ring blowing device 101 Including frame 103, lifting cylinder 104, lifting rod 105, first air inlet pipe 106, second air inlet pipe 107, first outer cylinder 108, second outer cylinder 109, third outer cylinder 110, guide air cylinder 111, The surrounding blower 112 and the airtight inner cylinder 113; the guide air cylinder 111, the surrounding blowing cylinder 112 and the inner cylinder 113 are arranged and connected in sequence from top to bottom, and the tow passes through them to be cooled, and the lifting cylinder 104 and lifting rod 105 frame 103 are located on the frame 103, and the first air inlet pipe 106 and the second air inlet pipe 107 are also located on the frame 103, and on the first air inlet pipe 106 and the second air inlet pipe 107 Both are provided with a deformation section 114 and a regulating valve 115. The purpose of the deformation section 114 is to cooperate with lifting, and the purpose of the regulating valve 115 is to adjust the wind speed; the second outer cylinder 109 is connected below the first outer cylinder 108, The third outer cylinder 110 is connected below the second outer cylinder 109, the piston rod of the lifting cylinder 104 and the top of the lifting rod 105 are connected to the bottom of the third outer cylinder 110, and the inside of the first outer cylinder 108 The guide air cylinder 111 is provided, and the guide air cylinder 111 is covered with oblique through holes 154 for blowing upward; what is blown out from the oblique through holes 154 is the upper ring blowing; the ring air blower 112 is located on the In the second outer tube 109, the wind blown from the ring blower 112 is the lower ring blowing, the inner tube 113 is located in the third outer tube 110 and the bottom exceeds the third outer tube 110; The area between the first outer cylinder 108 and the guide air cylinder 111 is the first annular cavity 116, and the area between the second outer cylinder 109 and the surrounding air cylinder 112 is the second annular cavity 117. The area between the third outer cylinder 110 and the inner cylinder 113 is the third annular cavity 118, the first annular cavity 116 is not connected with the second annular cavity 117, and the second annular cavity 117 communicates with the third annular cavity 118, the first air inlet pipe 106 is connected to the third outer tube 110 and communicates with the second annular cavity 117, and the second air inlet pipe 107 is connected to On the first outer cylinder 108 and in communication with the first annular cavity 116, a fixed ring 119 full of through holes is provided at the bottom of the second outer cylinder 109, and the bottom of the ring blower 112 is connected to the fixed ring 119 , an annular mesh 120 is sandwiched between the second outer cylinder 109 and the third outer cylinder 110; an annular air equalizing plate 121 is arranged inside the first annular cavity 116, and the annular air equalizing plate 121 is covered with the first air equalizing holes 122; the air conditioning unit 102 includes a fresh air pipe 131, a return air pipe 132, a discharge pipe 133, a return fan 134, a return air spray chamber 135, a discharge valve 136, a fresh air valve 137, Straight filter one 138, coarse filter two 139, front heater 140, front The surface cooler 141, the first spray chamber 142, the second spray chamber 143, the first rear surface cooler 144, the second rear surface cooler 145, the first rear heater 146, the second rear Heater 147, the first air blower 148, the second air blower 149, the first fine filter 150, the second fine filter 151, the first air supply port 152 and the second air supply port 153, the fresh air pipe 131, coarse filter one 138, The second coarse filter 139, the front heater 140, and the front surface cooler 141 are connected in sequence, the fresh air valve 137 is arranged on the fresh air pipe 131, the return air pipe 132 is connected with the fresh air pipe 131, and the return fan 134 And the return air spray chamber 135 is arranged on the return air pipe 132, the discharge pipe 133 is connected with the return air pipe 132, the discharge valve 136 is arranged on the discharge pipe 133, and the front surface cooler 141 is connected behind Two branches, one of which is provided with the first spray chamber 142, the first rear surface cooler 144, the first rear heater 146, the first air blower 148 and the first air supply port 152, and the other branch The second spray chamber 143, the second rear surface cooler 145, the second rear heater 147, the second air blower 149 and the second air supply port 153 are successively arranged on the road, and the first air supply port 152 and the ring blowing device The first air inlet pipe 106 of 101 communicates, and the second air supply port 153 communicates with the second air inlet pipe 107 of the surrounding air blowing device 101 .

The air conditioning unit 102 of this ring blowing spinning cooling device has two outlets, which can provide different air temperatures and humidity. During use, the fresh air and workshop return air respectively pass through the fresh air pipe 131, the primary filter 138, and the secondary filter 139. , pre-heater 140, and pre-surface cooler 141 are preliminarily treated, and the wind coming out of pre-surface cooler 141 enters two different branches respectively, and in each branch, the dust removal of the spray chamber is obtained, and the use of The rear surface cooler and the rear heater control different temperatures and humidity, and are finally finely filtered and blown out from different air outlets (i.e. the first air outlet 152 and the second air outlet 153), the first air outlet 152 and the ring The first air inlet pipe 106 of the blowing device 101 communicates, and the second air supply port 153 communicates with the second air inlet pipe 107 of the surrounding blowing device 101, and in the surrounding blowing device 101, the first air inlet pipe 106 is the main inlet. The air duct, the cooling air blown out from the first air outlet 152 enters the third outer tube 110 through the first air inlet tube 106, and the third outer tube 110 is a third annular cavity 118, in which the third annular cavity The cooling wind in 1187 can be evenly distributed, and finally runs upwards, passes through the annular mesh 120 and the fixed ring 119 and enters the second annular cavity 117, and the annular mesh 120 and the fixed ring 119 make the cooling wind running upwards become More uniform, the cooling air in the second annular cavity 117 has basically eliminated the influence of the unilateral air intake from the first air inlet pipe 106, so that the cooling air temperature and air pressure inside the second annular cavity 117 are relatively uniform, and finally the tow is mainly cooled by the surrounding blower 112, and the cooling effect is better because the cooling air is relatively uniform; In the first outer cylinder 108, there is an annular air equalizing plate 121 in the first outer cylinder 108. The annular air equalizing plate 121 is also to eliminate the influence of one-sided air intake, so that the air blown in from the second air inlet pipe 107 The wind is evenly distributed, and finally blows obliquely upwards through the guide air tube 111 to cool the tow. The impact brought by the downward movement improves the cooling effect in the ejection section of the as-spun fibers and improves the product quality; while the first annular cavity 116 and the second annular cavity 117 are not connected, and the wind sources of the two come from independent branch circuit, so the upper and lower ring blowing can be independently controlled to match different products. In this ring blow spinning cooling device, the height of the first outer cylinder 108 is much smaller than that of the second outer cylinder 109, which can generally be selected between 1:5 and 1:10; the angle of upward inclination of the inclined through hole 154 can be 5 degrees Choose between 45 degrees, such as 10 degrees, 20 degrees, etc. The surrounding hair dryer 112 is the same as the existing structure, such as the structure that can be made of non-woven fabric or metal mesh.

The test performance of the prepared nylon 6 fiber: linear density (dtex) 72.4, linear density deviation rate (%) 0.16, linear density variation coefficient CV (%) 0.36, breaking strength (cN/dtex) 4.31, breaking strength variation coefficient CV (%) 4.46, elongation at break (%) 36.6, elongation at break coefficient of variation CV (%) 7.09, shrinkage in boiling water (%) 9.3, this nylon 6 fiber dyed silk has uniform luster and has good market value.

In this embodiment, the company's special annular blowing spinning cooling device can be further improved, and automatic control is introduced, that is, an annular wind cover 123 is also provided in the first outer cylinder 108, and the shrinkage at the top of the annular wind cover 123 The diameter section 124 is connected to the first outer cylinder 108 through a bearing 125, and the annular section 126 at the bottom of the annular wind cover 123 is covered with second air equalization holes 129, and the annular section 126 at the bottom of the annular wind cover 123 is connected with the annular air equalization plate 121 Arranged side by side, the reduced-diameter section 124 at the top of the annular windshield 123 exposes the upper end surface of the first outer cylinder 108 and the reduced-diameter section 124 is provided with a gear 127; The transmission connection, the stepper motor 128 is controlled by the controller 130, wherein: the overlapping degree of the first uniform air hole 122 and the second uniform air hole 129 is X, and the controller 130 adjusts the overlap by controlling the rotation of the stepper motor 128 The size of the degree X further controls the air volume entering the guide air duct 111 .

The automatic control is introduced here to make the air temperature control more reasonable. The gear 127 can be adjusted so that the degree of overlap X is 50%. A temperature measurement point can be selected in the first annular cavity 116 to perform closed-loop control on the degree of overlap X. When the temperature is high, increase the value of the coincidence degree X, increase the cooling air volume, and improve the cooling effect; when the temperature is low, reduce the value of the coincidence degree X, reduce the cooling air volume, and ensure the cooling effect; closed-loop control can use PID control.

In order to consider the whole system as a whole, a first temperature measuring point 155 is set in the first annular cavity 116, a second temperature measuring point 156 is set in the second annular cavity 117, and the first temperature measuring point 156 is set in the second annular cavity 117. The temperature measured at the temperature point is T1, and the temperature measured at the second temperature measurement point is T2. T1*a+T2*b is used as the feedback value TF of the final measurement, and the standard value TB is set in the controller 130. When TF is greater than TB, increase When TF is smaller than TB, reduce the value of coincidence degree X, because the two strands of ring air are actually mixed in the ring blower 112, so the temperature of the lower layer of ring air should also be taken into consideration, so use The method of weighting the sampling signal, wherein a is greater than b, such as a is 0.9, b is 0.1, so that the weight of the temperature measured by the first annular cavity 116 is greater than that of the second annular cavity 117, because the controller 130 only The cooling air in the first annular cavity 116 can be adjusted.

The role of the regulating valve 115 remains the same, as in the prior art, it is used to control the wind speed from the large plate, and the controller 130 uses the rotation of the stepper motor 128 to adjust the size of the coincidence degree X and then controls the air volume entering the guide air cylinder 111 to be independent As for the control valve 115, generally speaking, the distance between the control valve 115 is relatively long, and there is a hysteresis in the control. It takes a certain amount of time for the opening of the control valve 115 to change to the change of the air volume of the guide air cylinder 111, and the control is not sensitive. At the same time, the control valve 115 itself There is also a problem with the accuracy; however, the ring blowing spinning cooling device invented by our company has a structure for adjusting the air volume at the position closest to the guide air cylinder 111, with a small lag, and uses the stepper motor 128 that can accurately control the angle to operate. The control effect is good. Stepper motor 128 drives gear 127 to rotate and is prior art, can adopt stepper motor 128 as shown in Figure 10 to directly drive pinion 157 and gear 127 meshes and realize (gear 127 is greater than pinion 157 and can improve control precision), also can Adopt the structure of Fig. 11, promptly stepper motor 128 drives leading screw 158, and leading screw 158 is threadedly matched with a slide block 159 that can reciprocate on seat body 160 (leading screw 158 can pass slide block 159), on slide block 159 The gear 127 is set to engage with the gear, and the base 160 can be arranged on the second air inlet pipe 107, or can be fixed on the first outer cylinder 108; Rotate to realize the adjustment of the coincidence degree X.

Example 7

As shown in Figure 12, the production method of the functional nylon 6 fiber described in this embodiment differs from Example 1 in that the masterbatch drying device is further improved, and the biggest difference in the drying method of the masterbatch is that further The air duct 203 does not enter the air from the workshop, but communicates with the top of the master batch tank 201 through the return air duct 235, because the master batch tank 201 itself stores hot air, so that the hot air circulates, which can effectively increase the temperature of the dry hot air and speed up the work. At the same time, it can achieve energy saving effect; the masterbatch drying device is shown in Figure 5. On the air return pipe 235, a supplementary air port 236 controlled by a valve can also be provided to supplement the air when necessary. A safety valve 237 can also be provided on the master batch tank 201 to automatically release when the pressure in the master batch tank 201 is too high. pressure for increased safety.

The above-mentioned embodiments are only examples to illustrate the concept of the present invention, and obviously, the scope of protection of this patent is not limited to the above-mentioned embodiments.

Various equivalent modifications or supplements made by those skilled in the art to the above embodiments shall fall within the scope of protection of this patent.

Claims (4)

1. a production method for functional nylon-6 fiber, is characterized in that comprising the steps:

The step that functional master batch is dried by a, employing master batch drying device, wherein, described master batch drying device includes the master batch tank (201) holding functional master batch, in dry run, master batch tank (201) has and blows from lower to upper, is dried functional master batch to the two of postpartum mastitis strands of hot blasts by center, and functional master batch is stirred to dry and is dried；

B, dried chinlon 6 section is uniformly mixed with the dried functional master batch of step a gained, in then adding mixture to screw extruder, carry out melt extruded；

C, fully melted blend melt is transported to spinning manifold, with constant amount, melt extrusion to filament spinning component will carry out spinning through dosing pump, then use cross air blasting or ring blowing that tow carries out cooling forming, then the tow after cooling is oiled；

D, will oil after tow carry out pre-network by path and silk door, then tow cold roller, hot-rolling are carried out drawing-off, the tow after drawing-off are added network, then tow is imported mound bobbins carry out high-speed winding and become cylinder；

E, test package；

nullMaster batch drying device employed in described step a，It includes the master batch tank (201) that bottom is tapered，Master batch tank (201) top is provided with exhaustor (202)、Bottom is provided with blast pipe (203)、Bottom is provided with discharge nozzle (204)，Blast pipe (203) is provided with heater (205)，Discharge nozzle (204) is provided with outlet valve (206)，It is provided with conic net (207) in master batch tank (201) bottom，Supporter (208) it is provided with between conic net (207) and master batch tank (201) inwall，This master batch drying device also includes motor (209)、Reductor (210)、First gear (211)、Second gear (212)、3rd gear (213)、4th gear (214)、5th gear (215)、Top chock (216)、Step (217)、Fixing bar (218)、First puddler (219)、Second puddler (220)、Compressed air hose (221) and pressure slack tank (222)；Described second puddler (220) is the tubular structure of hollow, described first puddler (219) first half has hollow structure (223), bottom has overstriking section (224), and described overstriking section (224) is provided with triangle paddle (225)；First puddler (219) is higher than the second puddler (220) through described second puddler (220) and the first puddler (219) top, also it is installed with in the second puddler (220) upper inside wall and there is the gas shutoff ring (227) in gap with the first puddler (219), between the first puddler (219) and the second puddler (220), be provided with three groups, upper, middle and lower bearing (226)；Top chock (216) is located at master batch tank (201) center of top, step (217) is located in the middle of fixing bar (218), fixing bar (218) is fixedly mounted on the position of master batch tank (201) interior middle and lower part, second puddler (220) passes top chock (216) and step (217), is designed with bearing (226) between top chock (216) and step (217) and the second puddler (220)；Described top chock (216) bottom surface has internal projecting ring (228), top has ring-type upper cover (229), and described step (217) top has ring-type upper cover (229), bottom has ring-type lower cover (230)；Described second puddler (220) is provided with auger leaf (231), and described triangle paddle (225) is positioned at fixing bar (218) bottom；Described compressed air hose (221) one end connects pressure slack tank (222), the other end is inserted in the hollow structure (223) of described first puddler (219), and described pressure slack tank (222) connects source of the gas and it is externally provided with heating jacket (232)；Described first puddler (219) middle part is provided with the big venthole (233) communicated with its hollow structure inside (223), is covered with little venthole (234) on the second puddler (220)；Described motor (209) is located at master batch tank (201) top and is in transmission connection with described reductor (210), described first gear (211) is in transmission connection with reductor (210), described 4th gear (214) is positioned at described first puddler (219) top, described 5th gear (215) is positioned at the second puddler (220) top, and the first puddler (219) also extends through described 5th gear (215)；Described first gear (211) is engaged with the second gear (212)；Described second gear (212) is engaged with the 3rd gear (213) and the 5th gear (215) simultaneously, and described 3rd gear (213) engages with the 4th gear (214)；Workshop wind enters from blast pipe (203) and obtains the heating of heater (205), and the hot blast formed up blows, from master batch tank (201) bottom, the hot blast blown from lower to upper described in formation；The heated chuck of the compressed air (232) in slack tank (222) is pressed to form hot compressed air after heating, by center to the hot blast of postpartum mastitis described in the outside blowout formation afterwards of the compressed air hose of hot compressed air (221), the hollow structure inside (223) of the first puddler (219), big venthole (233) and venthole (234)；Described motor (209) drives the first gear (211) to rotate by reductor (210), first gear (211) on the one hand drives the 5th gear (215) to rotate by the second gear (212) engagement, 5th gear (215) drives the second puddler (220) to rotate and forms stirring, additionally, first gear (211) drives the 4th gear (214) to rotate by the second gear (212) and the 3rd gear (213), 4th gear (214) drives the first puddler (219) to rotate and also forms stirring, auger leaf (231) on second puddler (220) is contrary with triangle paddle (225) rotation direction on the first puddler (219).

2. the production method of the functional nylon-6 fiber described in claim 1, is characterized in that: functional master batch described in described step a is antibacterial matrices, fire-retardant master granule, ultraviolet screening mother granule or radioprotective master batch；In described step b, the thermal treatment zone of screw extruder is six, its temperature is a district 260～262 DEG C, two districts 265～268 DEG C, three districts 265～268 DEG C, four districts 265～268 DEG C, five districts 265～268 DEG C, six districts 265～268 DEG C, and melt pressure is 11.0～12.0MPa；Blend melt the most melted in described step c is transported to spinning manifold by utilidor, and the temperature of spinning manifold is 263～270 DEG C；Cross air blasting temperature 18～20 DEG C, humidity 65%～80%；Upper oil mass is 1.0～1.2%；In described step d, drawing-off first uses two cold rollers to carry out drawing-off, and two hot-rollings of rear employing carry out drawing-off, and heat roller temperature is 145～175 DEG C, and drawing-off speed is 1.1～1.2；High-speed winding becomes the winding speed of cylinder to be 4000～4200m/min.

3. the production method of the functional nylon-6 fiber described in claim 2, is characterized in that: described radioprotective master batch includes the nickel sulfate of 0.1 part, the copper sulfate of 0.1 part, sodium zirconium phosphate silver, the barium sulfate of 1 part, the dispersant of 1 part, the dyestuff of 10 parts and the chinlon 6 section of 87.5 parts of 0.3 part by weight.

4. the production method of the functional nylon-6 fiber described in claim 1, it is characterized in that using in ring blowing spinning chiller for tow is carried out ring quenching in step c, the blowing of described ring is divided into upper and lower two-layer and separate, upper layer circular air blow tilts upward blowout, lower layer circular air blow is main body, level blowout from ring Blowing drum, ring blowing temperature and temperature are less than lower layer circular air blow at the middle and upper levels for they.