CN201835015U

CN201835015U - Spinneret plate for dry spinning of high-performance polyethylene fibers

Info

Publication number: CN201835015U
Application number: CN2010205741746U
Authority: CN
Inventors: 孔凡敏; 薛守标; 王祥云; 景强
Original assignee: Research Institute of Nanjing Chemical Industry Group Co Ltd; China Petrochemical Corp
Current assignee: China Petrochemical Corp; Research Institute of Sinopec Nanjing Chemical Industry Co Ltd
Priority date: 2010-10-22
Filing date: 2010-10-22
Publication date: 2011-05-18
Anticipated expiration: 2020-10-22

Abstract

The utility model relates to the technical field of chemical equipment, in particular to a key component namely a spinneret plate on a spinning device in dry spinning production of high-performance polyethylene fibers with ultra-high molecular weight. A spinneret zone of the spinneret plate is circular ring-shaped, the center of the spinneret plate is solid, and a plurality of spinneret holes which are the same are arrayed and distributed on the spinneret plate; each spinneret hole consists of a pressure release zone, a retraction zone and a constant-flow zone; the spinneret holes are arrayed and distributed into the shape of a regular triangle or an inverted triangle; and the space between adjacent spinneret holes is larger than the aperture D0 of an inlet of each spinneret hole in the pressure release zone. Compared with the traditional spinneret plate, the spinneret plate has the following characteristics: the spinneret plate with reasonable equipment structure can effectively lower the melt spinning pressure, improve the crystallization orientating degree of raw yarns, and enhance the strength of the fibers and the like.

Description

A kind of high-performance polyethylene fibres dry spinning spinnerets

Technical field: the utility model belongs to technical field of chemical, is specifically related to the critical component-spinnerets on the device for spinning in the production of super high molecular weight high-performance polyethylene fibres dry spinning.

Background technology: spinnerets is the key component of device for spinning, in the high-performance polyethylene fibres process units, spinnerets is determining the key of fiberizing, because the production of high-performance polyethylene fibres exists two kinds of different process routes of dry method and wet method, its process route is also different to the requirement of spinnerets.Produce in the high-performance polyethylene fibres process in dry spinning, because the process route employing is that high-temperature fusion is spun, after the process process of spinnerets, the solvent flash evapn in the strand becomes silk, so the dry method route requires most important to Design of spinneret.Traditional spinnerets can increase the pressure of supercharging delivery side of pump in dry process, the fiber crystalline orientation degree of moulding simultaneously is poor, intensity is low, the secondary drawing-off of spinning after also being unfavorable for.

Summary of the invention: the purpose of this utility model is exactly in order to address the above problem, to reduce head pressure, improve the crystalline orientation degree of fiber in the spinnerets process, improve fibre strength, having designed novel spinnerets especially.

The utility model spinnerets is through experimental provision checking, and it is low to have molten spinning pressure, and the characteristics that fibre strength is high are adapted to high-performance polyethylene fibres dry spinning field especially.

Technical solution of the present utility model: the spray silk zone of spinnerets is a form of annular rings, and the spinnerets center is solid, is placed with some identical spinneret orifices on the spinnerets, and each spinneret orifice is formed by voltage discharging area, shrinking zone, three sections zones, constant current district; The spinneret orifice arrangement form is that positive triangle or del are arranged, and the spinneret orifice spacing is greater than voltage discharging area spinneret orifice import aperture D ₀

Usually, the utility model is an effect of easing stress of guaranteeing spinnerets, and spinneret orifice is imported and exported aperture ratio D ₀/ D _iBe controlled at preferred 6: 1～10: 14: 1～15: 1.

The utility model voltage discharging area region is circular arc, and the cross section is V-shaped, reduces the resistance that spinning solution enters spinnerets; V-arrangement cross section angle is at 30～150 °, and preferred 60 °～120 °, preferred again 60～120 °, more preferably 80 °～100 °, most preferably 90 °.

Region, the utility model shrinking zone is trapezoidal shape, and the cross section angle of trapezoidal formation is at 6 °～15 °, and preferred 8 °～12 °, most preferably 9 °.Main purpose is to improve the crystalline orientation degree of fiber, increases the intensity of fiber precursor, improves quality of fibre, and the shrinking zone structure also helps reducing the resistance that spinning solution enters spinneret orifice simultaneously.The joint face of voltage discharging area and shrinking zone is circular arc, avoids raw material overstocking herein, improves the crystalline orientation degree of fiber.

The cross section of region, constant current of the present utility model district is a rectangle, and for guaranteeing the stable molding of fiber, its Aspect Ratio is at 2: 1～15: 1, preferred 4: 1～12: 1, and more preferably 6: 1～10: 1, most preferably 8: 1; The constant current section length is 2～15 times of D _i, preferred length is 8 times of D _i

60～400 of the utility model spinneret orifice numbers, 230 of preferred spinneret orifice numbers.

The spinnerets material is a stainless steel material, and test is 316L with material; The center of spinnerets is one solid, and solid diameter remains on 5～16mm, and this design mainly is the optimal design of carrying out according to technological requirement, effectively guarantees the even evaporation of solvent in the precursor that spinneret orifice forms.

The utility model spinnerets is compared with traditional spinnerets, and it is reasonable to have a device structure, can effectively reduce the pressure of molten spinning, improves precursor crystalline orientation degree height, characteristics such as fortifying fibre intensity.

Description of drawings: Fig. 1 is the schematic top plan view of the utility model embodiment; The domatic structural representation of vertical section of the single spinneret orifice of Fig. 2 present embodiment.

In the accompanying drawing, the 1-spinnerets; The 2-spinneret orifice; The 3-voltage discharging area; The 4-shrinking zone; 5-constant current district; D ₀The empty import of-spray silk aperture; D _i-spinneret orifice outlet aperture.

The specific embodiment: the utility model is described in detail below in conjunction with drawings and Examples.

Embodiment:

1, the spinnerets form is round, D ₀/ D _i317 of=3.6mm/0.6mm spinnerets hole counts, 90 ° of voltage discharging area V-type cross-sectional angle, 9 ° at angle, trapezoid cross section, shrinking zone, constant current section length 6mm;

Fracture strength/CN/dtex	Elongation at break/%	Work to break	Modulus/CN/dtex	Spinnerets
					3.87?	14.27?	55.2249?	40.65?	Research and development
3.75?	14.12?	52.95?	40.38?	Research and development
					2.38?	10.18?	24.2284?	26.17?	Generally

2, the spinnerets form is round, D ₀/ D _i230 of=5mm/0.75mm spinnerets hole counts, 90 ° of voltage discharging area V-type cross-sectional angle, 9 ° at angle, trapezoid cross section, shrinking zone, constant current section length 6mm;

Fracture strength/CN/dtex	Elongation at break/%	Work to break	Modulus/CN/dtex	Spinnerets
					3.63?	14.79?	53.6877?	40.49?	Research and development
3.77?	13.5?	50.895?	40.29?	Research and development
					2.38?	10.18?	24.2284?	26.17?	Generally

3, the spinnerets form is round, D ₀/ D _i396 of=3.6mm/0.6mm spinnerets hole counts, 90 ° of voltage discharging area V-type cross-sectional angle, 9 ° at angle, trapezoid cross section, shrinking zone, constant current section length 4.8mm;

Fracture strength/CN/dtex	Elongation at break/%	Work to break	Modulus/CN/dtex	Spinnerets
					4.22?	15.92?	67.1824?	42.55?	Research and development
4.19?	13.55?	56.7745?	37.58?	Research and development
					2.38?	10.18?	24.2284?	26.17?	Generally

From the foregoing description, can find out obviously that the utility model spinnerets is compared with general spinnerets, improved the crystalline orientation degree of fiber effectively, strengthened the performance quality of fiber.

Claims

1. high-performance polyethylene fibres dry spinning spinnerets, the spray silk zone that it is characterized in that spinnerets is form of annular rings, the spinnerets center is solid, is placed with some identical spinneret orifices on the spinnerets, and each spinneret orifice is formed by voltage discharging area, shrinking zone, three sections zones, constant current district; The spinneret orifice arrangement form is that positive triangle or del are arranged, and the spinneret orifice spacing is greater than voltage discharging area spinneret orifice import aperture D ₀

2. spinnerets as claimed in claim 1 is characterized in that spinneret orifice import and export aperture D ₀/ D _iBe controlled at 4: 1～15: 1; The voltage discharging area region is circular-arc, and angle is 30～150 °; The region, shrinking zone is trapezoidal shape, and angle is 6～15 °; The cross section of region, constant current district is a rectangle, and its Aspect Ratio was at 2: 1～15: 1, and the constant current section length is 2～15 times of D _i

3. spinnerets as claimed in claim 2 is characterized in that spinneret orifice import and export aperture D ₀/ D _iBe controlled at 6: 1～10: 1.

4. spinnerets as claimed in claim 2 is characterized in that the voltage discharging area region is circular-arc, and angle is 90 °; The region, shrinking zone is trapezoidal shape, and angle is 9 °; The cross section in constant current district is a rectangle, and its Aspect Ratio was at 8: 1; The constant current section length is 8 times of D _i

5. spinnerets as claimed in claim 1, the center that it is characterized in that spinnerets is solid, solid diameter is 5～16mm.

6. spinnerets as claimed in claim 1 is characterized in that 60～400 of spinneret orifice numbers.

7. spinnerets as claimed in claim 6 is characterized in that 230 of spinneret orifice numbers.