CN209383686U - A kind of preparation system of high viscosity nylon 6 slice - Google Patents

A kind of preparation system of high viscosity nylon 6 slice Download PDF

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Publication number
CN209383686U
CN209383686U CN201821219563.XU CN201821219563U CN209383686U CN 209383686 U CN209383686 U CN 209383686U CN 201821219563 U CN201821219563 U CN 201821219563U CN 209383686 U CN209383686 U CN 209383686U
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drying tower
polymerization pipe
slice
heater
nitrogen
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倪利锋
刘国
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Jiangyin Bailida industrial cloth Co.,Ltd.
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JIANGSU BAILIDA Co Ltd
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Abstract

The utility model is the preparation system of high viscosity nylon 6 slice, and structure includes the molten-bath being sequentially connected, pans, pre-heater, pre-polymerization pipe, rear polymerization pipe, fondant filter, end of extruded band, pelleter, vibrating screen, pre-extracted water pot, extraction tower, dewaterer, the first drying tower, the first surge tank, the second drying tower, the second surge tank and cooling feed bin.The advantages of the utility model: terminal amino group content is improved, discharge pressure is improved between forward and backward poly- pipe, quickly improve viscosity, two sets of drying towers are set, the efficiency of solid phase polycondensation can be improved, reduce energy loss, nitrogen distributor up and down is respectively set in every set drying tower, each nitrogen distributor connects independent heater, improves efficiency and quality, obtains 4.30~4.42 nylon 6 slice of hyperviscosity.

Description

A kind of preparation system of high viscosity nylon 6 slice
Technical field
The utility model relates to a kind of preparation systems of high viscosity nylon 6 slice, belong to high molecular polymerization technology Field.
Background technique
Nylon 6, i.e. polyamide -6, also known as PA6 are a kind of common polymer raw materials, main to be applied to spinning, engineering Plastic applications, viscosity are generally 2.4~3.0.Applied to the nylon 6 of polymeric film art, usually require that its viscosity reaches 3.2 ~4.0.
The prior art generally passes through the vacuum degree and temperature after improved in polymerization process, prepares relative viscosity 3.0 or so The wet slice of nylon 6, by making slice and high temperature inert gas convection current, remove slice then through extraction, drying, solid phase polycondensation In water and promote remaining pendant carboxylic group and amino in slice further to react, the nylon 6 that high relative viscosity is finally made is cut Piece.But obtained nylon 6 slice viscosity is still lower, far from meeting the market demand, and terminal amino group content is low, be unfavorable for into Row dyeing.
Utility model content
The utility model proposes a kind of preparation systems of high viscosity nylon 6 slice, and purpose is intended to overcome existing Technology above shortcomings, the preparation of high viscosity nylon 6 slice.
The technical solution of the utility model: a kind of preparation system of high viscosity nylon 6 slice, structure include according to The secondary molten-bath being connected by pipeline, pre-heater, pre-polymerization pipe, rear polymerization pipe, fondant filter, end of extruded band, is cut pans Grain machine, vibrating screen, pre-extracted water pot, extraction tower, dewaterer, the first drying tower, the first surge tank, the second drying tower, second are delayed Rush tank and cooling feed bin.
Preferably, the pans connect end-capping reagent storage tank.
Preferably, gear pump is set between the pre-polymerization pipe and rear polymerization pipe.
Preferably, the pre-polymerization pipe and rear polymerization pipe are all respectively provided with the mutually independent heating system of upper, middle and lower segment System.
Preferably, upper and lower ends set the first nitrogen distributor and the distribution of the second nitrogen respectively in first drying tower Device, upper and lower ends set third nitrogen distributor and the 4th nitrogen distributor respectively in the second drying tower, and third nitrogen distributor connects Third heater is connect, the 4th nitrogen distributor connects the 4th heater.
The advantages of the utility model: structure is simple and effective, and triamido end-capping reagent is added in pans, improves Amino End Group and contains Amount, improves discharge pressure between preceding poly- pipe and rear poly- pipe, quickly improves viscosity, and two sets of drying towers are arranged, solid phase polycondensation can be improved Efficiency, and reduce energy loss, two nitrogen distributors up and down are respectively set in every set drying tower, and each nitrogen distributor connects The only heater of order, effectively increases production efficiency and product quality, and the nylon 6 that hyperviscosity 4.30~4.42 can be obtained is cut Piece.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the preparation system of the utility model high viscosity nylon 6 slice.
1 in figure it is molten-bath, 2 be pans, 3 be end-capping reagent storage tank, 4 be pre-heater, 5 be pre-polymerization pipe, 6 is tooth Wheel pump, 7 be rear polymerization pipe, 8 be fondant filter, 9 be end of extruded band, 10 be pelleter, 11 be vibrating screen, 12 be pre-extracted water Tank, 13 be extraction tower, 14 be dewaterer, 15 be the first drying tower, 151 be the first nitrogen distributor, 152 be the second nitrogen distribution Device, 153 be primary heater, 154 be secondary heater, 16 be the first surge tank, 17 be the second drying tower, 171 be third nitrogen Gas distributor, 172 be the 4th nitrogen distributor, 173 be third heater, 174 be the 4th heater, 18 be the second surge tank, 19 be cooling feed bin.
Specific embodiment
The utility model is described in further detail below with reference to embodiment and specific embodiment.
As shown in Figure 1, a kind of preparation system of high viscosity nylon 6 slice, structure includes passing sequentially through pipeline to be connected Molten-bath 1, pans 2, pre-heater 4, pre-polymerization pipe 5, rear polymerization pipe 7, fondant filter 8, end of extruded band 9, pelleter 10, Vibrating screen 11, pre-extracted water pot 12, extraction tower 13, dewaterer 14, the first drying tower 15, the first surge tank 16, the second drying tower 17, the second surge tank 18 and cooling feed bin 19.
The pans 2 connect end-capping reagent storage tank 3.
Gear pump 6 is set between the pre-polymerization pipe 5 and rear polymerization pipe 7.
The pre-polymerization pipe 5 and rear polymerization pipe 7 is all respectively provided with the mutually independent heating system of upper, middle and lower segment.
Upper and lower ends set the first nitrogen distributor 151 and the second nitrogen distributor respectively in first drying tower 15 152, upper and lower ends set third nitrogen distributor 171 and the 4th nitrogen distributor 172, third nitrogen respectively in the second drying tower 17 Distributor 171 connects third heater 173, and the 4th nitrogen distributor 172 connects the 4th heater 174.
A kind of preparation method of high viscosity nylon 6 slice, comprises the following steps that:
1) raw material is prepared: smashed solid caprolactam being put into molten-bath, is molten into 115~125 DEG C of temperature of liquid Liquid caprolactam and end-capping reagent injection pans are uniformly mixed, after being preheated to 165~170 DEG C, through pre-add by intimate lactams Hot device injects pre-polymerization pipe after being heated to 205~215 DEG C；
2) pre-polymerization: pre-polymerization pipe upper section heating system is controlled at 235~245 DEG C, Mid-section heating system control temperature Degree for 245~255 DEG C, lower section heating system controlled at 225~235 DEG C, control pre-polymerization pipe internal pressure be 0.2~ 0.25MPa；
3) melt conveying: melt from pre-polymerization bottom of the tube by gear pump through pipeline pressurized delivered the polymerization pipe after, melt Pressure is 0.9~1.1Mpa；
4) polymerize afterwards: rear polymerization pipe upper section heating system is controlled at 225~235 DEG C, Mid-section heating system control temperature Degree is 245~250 DEG C, lower section heating system is controlled at 250~255 DEG C, and control pre-polymerization pipe internal pressure is normal pressure；
5) Cast Strip and pelletizing: melt is delivered to end of extruded band through fondant filter and is extruded as cylindric from rear polymerization bottom of the tube Melt item, is cooled down by cold water, through pelleter pelletizing, obtains particle；
6) extract: particle enters pre-extracted water pot through vibrating screen, and control pre-extracted coolant-temperature gage is 100~105 DEG C, and particle exists It is delivered in extraction tower after stopping 10~14h in pre-extracted water pot, water temperature control is 100~120 DEG C in extraction tower, and particle stops After being delivered to dewaterer dehydration after 10~14h, it is sent into the first drying tower；
7) dry and solid phase polycondensation: the first drying tower top nitrogen flow is 4000~5000Nm3/ h, temperature control are 110~125 DEG C, lower part nitrogen flow is 4000~5000Nm3/ h, temperature control are 115~120 DEG C, and it is small that slice stops 7~8 Shi Hou enters the second drying tower after the first surge tank；Second drying tower top nitrogen flow is 4500~5500Nm3/ h, temperature Degree control is 135~140 DEG C, and lower part nitrogen flow is 4500~5500Nm3/ h, temperature control are 130~135 DEG C, and slice stops After staying 3~4 hours, cooling feed bin is entered after the second surge tank, obtains high viscosity nylon 6 slice.
The end-capping reagent is 1,3,5- triaminobenzene or diethylenetriamines or 4,4,4- triaminotriphenyl-methane.
Embodiment 1
A kind of preparation method of high viscosity nylon 6 slice, comprises the following steps that:
1) raw material is prepared: smashed solid caprolactam being put into molten-bath, is molten into 115 DEG C of temperature of liquid in oneself Liquid caprolactam and 1,3,5- triaminobenzene of end-capping reagent injection pans are uniformly mixed by amide, after being preheated to 165 DEG C, warp Pre-heater injects pre-polymerization pipe after being heated to 205 DEG C；
2) pre-polymerization: pre-polymerization pipe upper section heating system controlled at 235 DEG C, Mid-section heating system controlled at 245 DEG C, lower section heating system controlled at 225 DEG C, control pre-polymerization pipe internal pressure be 0.2MPa；
3) melt conveying: melt from pre-polymerization bottom of the tube by gear pump through pipeline pressurized delivered the polymerization pipe after, melt Pressure is 0.9Mpa；
4) polymerize afterwards: rear polymerization pipe upper section heating system controlled at 225 DEG C, Mid-section heating system controlled at 245 DEG C, lower section heating system controlled at 250 DEG C, control pre-polymerization pipe internal pressure be normal pressure；
5) Cast Strip and pelletizing: melt is delivered to end of extruded band through fondant filter and is extruded as cylindric from rear polymerization bottom of the tube Melt item, is cooled down by cold water, through pelleter pelletizing, obtains particle；
6) extract: particle enters pre-extracted water pot through vibrating screen, and control pre-extracted coolant-temperature gage is 100 DEG C, and particle is extracting in advance It is delivered in extraction tower after stopping 10h in fetching tank for water, water temperature control is 100 DEG C in extraction tower, is delivered to after particle stop 10h de- After water dispenser dehydration, it is sent into the first drying tower；
7) dry and solid phase polycondensation: the first drying tower top nitrogen flow is 4000Nm3/ h, temperature control are 110 DEG C, under Portion's nitrogen flow is 4000Nm3/ h, temperature control are 115 DEG C, and after slice stops 7 hours, second is entered after the first surge tank Drying tower；Second drying tower top nitrogen flow is 4500Nm3/ h, temperature control are 135 DEG C, and lower part nitrogen flow is 4500Nm3/ h, temperature control are 130 DEG C, after slice stops 3 hours, cooling feed bin are entered after the second surge tank, obtains superelevation Viscosity nylon 6 is sliced, relative viscosity 4.38.
Embodiment 2
A kind of preparation method of high viscosity nylon 6 slice, comprises the following steps that:
1) raw material is prepared: smashed solid caprolactam being put into molten-bath, is molten into 120 DEG C of temperature of liquid in oneself Liquid caprolactam and end-capping reagent diethylenetriamines injection pans are uniformly mixed, after being preheated to 165 DEG C, through pre- by amide Heater injects pre-polymerization pipe after being heated to 210 DEG C；
2) pre-polymerization: pre-polymerization pipe upper section heating system controlled at 240 DEG C, Mid-section heating system controlled at 250 DEG C, lower section heating system controlled at 230 DEG C, control pre-polymerization pipe internal pressure be 0.2MPa；
3) melt conveying: melt from pre-polymerization bottom of the tube by gear pump through pipeline pressurized delivered the polymerization pipe after, melt Pressure is 1.0Mpa；
4) polymerize afterwards: rear polymerization pipe upper section heating system controlled at 230 DEG C, Mid-section heating system controlled at 245 DEG C, lower section heating system controlled at 255 DEG C, control pre-polymerization pipe internal pressure be normal pressure；
5) Cast Strip and pelletizing: melt is delivered to end of extruded band through fondant filter and is extruded as cylindric from rear polymerization bottom of the tube Melt item, is cooled down by cold water, through pelleter pelletizing, obtains particle；
6) extract: particle enters pre-extracted water pot through vibrating screen, and control pre-extracted coolant-temperature gage is 100 DEG C, and particle is extracting in advance It is delivered in extraction tower after stopping 12h in fetching tank for water, water temperature control is 110 DEG C in extraction tower, is delivered to after particle stop 12h de- After water dispenser dehydration, it is sent into the first drying tower；
7) dry and solid phase polycondensation: the first drying tower top nitrogen flow is 4500Nm3/ h, temperature control are 120 DEG C, under Portion's nitrogen flow is 4500Nm3/ h, temperature control are 120 DEG C, and after slice stops 8 hours, second is entered after the first surge tank Drying tower；Second drying tower top nitrogen flow is 5000Nm3/ h, temperature control are 135 DEG C, and lower part nitrogen flow is 5000Nm3/ h, temperature control are 130 DEG C, after slice stops 4 hours, cooling feed bin are entered after the second surge tank, obtains superelevation Viscosity nylon 6 is sliced, relative viscosity 4.42.
Embodiment 3
A kind of preparation method of high viscosity nylon 6 slice, comprises the following steps that:
1) raw material is prepared: smashed solid caprolactam being put into molten-bath, is molten into 125 DEG C of temperature of liquid in oneself Liquid caprolactam and 4,4,4- triaminotriphenyl-methane of end-capping reagent injection pans are uniformly mixed, are preheated to 170 DEG C by amide Afterwards, pre-polymerization pipe is injected after pre-heater is heated to 215 DEG C；
2) pre-polymerization: pre-polymerization pipe upper section heating system controlled at 245 DEG C, Mid-section heating system controlled at 255 DEG C, lower section heating system controlled at 235 DEG C, control pre-polymerization pipe internal pressure be 0.25MPa；
3) melt conveying: melt from pre-polymerization bottom of the tube by gear pump through pipeline pressurized delivered the polymerization pipe after, melt Pressure is 1.1Mpa；
4) polymerize afterwards: rear polymerization pipe upper section heating system controlled at 235 DEG C, Mid-section heating system controlled at 250 DEG C, lower section heating system controlled at 255 DEG C, control pre-polymerization pipe internal pressure be normal pressure；
5) Cast Strip and pelletizing: melt is delivered to end of extruded band through fondant filter and is extruded as cylindric from rear polymerization bottom of the tube Melt item, is cooled down by cold water, through pelleter pelletizing, obtains particle；
6) extract: particle enters pre-extracted water pot through vibrating screen, and control pre-extracted coolant-temperature gage is 105 DEG C, and particle is extracting in advance It is delivered in extraction tower after stopping 14h in fetching tank for water, water temperature control is 120 DEG C in extraction tower, is delivered to after particle stop 14h de- After water dispenser dehydration, it is sent into the first drying tower；
7) dry and solid phase polycondensation: the first drying tower top nitrogen flow is 5000Nm3/ h, temperature control are 125 DEG C, under Portion's nitrogen flow is 5000Nm3/ h, temperature control are 120 DEG C, and after slice stops 8 hours, second is entered after the first surge tank Drying tower；Second drying tower top nitrogen flow is 5500Nm3/ h, temperature control are 140 DEG C, and lower part nitrogen flow is 5500Nm3/ h, temperature control are 135 DEG C, after slice stops 4 hours, cooling feed bin are entered after the second surge tank, obtains superelevation Viscosity nylon 6 is sliced, relative viscosity 4.30.
Above-described is only preferred embodiments of the present invention, it is noted that for the ordinary skill of this field For personnel, without departing from the concept of the present invention, various modifications and improvements can be made, these all belong to In the protection scope of the utility model.

Claims (1)

1. a kind of preparation system of high viscosity nylon 6 slice, feature include passing sequentially through the connected molten-bath of pipeline, centre Tank, pre-heater, pre-polymerization pipe, rear polymerization pipe, fondant filter, end of extruded band, pelleter, vibrating screen, pre-extracted water pot, extraction Tower, dewaterer, the first drying tower, the first surge tank, the second drying tower, the second surge tank and cooling feed bin；The pans Connect end-capping reagent storage tank；Gear pump is set between the pre-polymerization pipe and rear polymerization pipe；The pre-polymerization pipe and rear polymerization pipe All it is respectively provided with the mutually independent heating system of upper, middle and lower segment；Upper and lower ends set first respectively in first drying tower Nitrogen distributor and the second nitrogen distributor, upper and lower ends set third nitrogen distributor and the 4th nitrogen respectively in the second drying tower Distributor, third nitrogen distributor connect third heater, and the 4th nitrogen distributor connects the 4th heater.
CN201821219563.XU 2018-07-30 2018-07-30 A kind of preparation system of high viscosity nylon 6 slice Active CN209383686U (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
CN201821219563.XU CN209383686U (en) 2018-07-30 2018-07-30 A kind of preparation system of high viscosity nylon 6 slice

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Address after: 214426 No.15 Xinyang Road, Xinqiao Town, Jiangyin City, Wuxi City, Jiangsu Province

Patentee after: Jiangyin Bailida industrial cloth Co.,Ltd.

Address before: 214426 No.15 Xinyang Road, Xinqiao Town, Jiangyin City, Wuxi City, Jiangsu Province

Patentee before: JIANGSU BAILIDA Co.,Ltd.