The manufacturing process of fine-denier polypropylene staple fibre
The invention belongs to the manufacturing technique of a kind of suitability for industrialized production of polypropylene fiber, it is called the manufacturing process of fine-denier polypropylene staple fibre.
Present cotton spinning industry is all depressed, and its main cause is that aging cotton is in short supply in addition for product structure.Proverb is said right " skilful son's wife's difficulty makes bricks without straw ", is not having raw material, or under the situation of raw material sources wretched insufficiency, the development of cotton spinning industry: the one, lean on national policy; The 2nd, seek new raw material sources.Promptly to look for the best alternative fiber of cotton fiber.After practice makes people recognize that progressively fiber number when third fiber is less than 1.11dtex, just thoroughly eliminated the wax sense of synthetic fiber, its outward appearance and feel not only are as good as with the combed cotton of high-quality, and having than the better wicking of cotton, is one of a kind of desirable update product that solve current cotton fiber imbalance between supply and demand.Polypropylene fibre is a kind of fiber of cheapness, adds its light specific gravity (seeing the following form), and the material of equal weight can be produced more fabric, helps reducing cost.
The proportion of several fibers
Polypropylene fibre: 0.91~0.92 nylon: 1.14
Cotton: 1.50~1.55 terylene: 1.38~1.39
Viscose glue: 1.52 eyeball synthetic fibres: 1.14~1.17
Wool: 1.30~1.32 glasses: 2.54
Polypropylene fibre also has good anti-chemical, the concentrated sulfuric acid, concentrated hydrochloric acid almost do not have influence to polypropylene fibre, in 50% NaOH solution, or intensity reduces hardly in 28% the ammoniacal liquor, under the effect of strong oxidizer, the intensity of polypropylene fibre is almost constant, polypropylene fiber also has anti-insect, antimycotic performance, and regain is extremely low, and contamination property and contaminative are also very low, and gather static and be easy to characteristics such as washing for a short time, be a kind of cheap and good-quality raw material, but, make its application be subjected to very big restriction because the manufacturing fiber number of polypropylene fiber rests on the level at thick dawn for many years always.The manufacturing of fine-denier polypropylene staple fibre for many years still rests on the breadboard stage, does not form large-scale industrial production, and its main cause is to produce fabrication technique owing to never design rational large-scale industry aristogenesis.
The purpose of the present invention design is to avoid above-mentioned the deficiencies in the prior art, and the manufacturing process of the short dimension of a kind of fine-denier polypropylene is provided, and the large-scale industrial production of the fine-denier polypropylene staple fibre of 0.56~1.11dtex can be put into practice, and its technological process is as follows:
Pass through again after polypropylene P.P section and the suitable blend of additive before spin, after spin manufacturing procedure and finish, the additive that it is characterized in that first procedure is by antistatic additive, lubricant, mixes by different proportionings, before spin that manufacturing procedure comprises the spinning cooling quench, the bucket of reeling, fall, after spin that operation comprises, boundling, one drawing-off oil bath, two road drawing-offs, superheated steam, three road drawing-offs, finish application bath, curl, Re Dingre, cut-out packing.It is the technological improvement of producing third fiber to existing, the technology advantages of simple, design the rational polymer-extruded expanded distribution plate and the draw ratio of spinnerets, can satisfy the requirement of cotton spinning machine to the fine-denier polypropylene staple fibre, on the basis of original production polypropylene fibre, suitably adjust fabrication process condition, can finish the present invention, raw material sources are very abundant, the product of being produced has the advantages that to improve fabric feeling and wearability, and cost is low, and price has only 80% of cotton fiber, it is the material of taking of suitable popular consumption, the wax sense of energy radical change chemical ﹠ blended fabric, wicking should be better than other chemical ﹠ blended fabrics, and gas permeability is good, feel has the same feel of natural fabric, can reach with genuine style of false generation.
To achieve these goals, the present invention can adopt following measure to realize, described fine-denier polypropylene staple fibre manufacturing process is as follows:
Pass through again after polypropylene P.P section and the suitable blend of additive and before spin, after spin manufacturing procedure, it is characterized in that additive is by anti-quiet dose, lubricant, mix by different proportionings, before spin manufacturing procedure and comprise cooling quench, reel, bucket falls, after spin manufacturing procedure and comprise, boundling, one drawing-off, oil bath, two road drawing-offs, superheated steam, three road drawing-offs, finish application bath, curl, HEAT SETTING, cut off packing, the temperature in screw rod five districts in the described fore-spinning is between 270~305 ℃, the temperature in flange district is controlled at: 270~280 ℃, bend pipe district: 265~275 ℃, spinning manifold: 265~275 ℃, quench air velocity: 0.4~0.6m/min, wind-warm syndrome: 15~25 ℃, spin speed: 700~850m/min, before spin and oil: 1~2.1%, precursor oil supply rate: the 12%-20% that wets.
To achieve these goals, the present invention can also adopt following measure to realize, spin its total denier of boundling in the manufacturing procedure after described at ten thousand dawn of 65-78, the total draft multiple is 3-4 (comprising one drawing-off, two road drawing-offs, three road drawing-off sums), draw speed is 80~120m/min (speed that refers to last wire vent), used steam is superheated steam: 110-125 ℃ in drafting process, and the crimping machine master presses: 1.8~2.0kg/cm
2, back pressure: 1.0~1.5kg/cm
2
To achieve these goals, the present invention can also adopt following measure to realize, the temperature in HEAT SETTING four districts in the manufacturing procedure of described back is respectively: a district: 90~110 ℃, and two districts: 110~120 ℃, three districts: 120~130 ℃, four districts: 90~100 ℃.
To achieve these goals, the present invention can also adopt following measure to realize, spins the used spinnerets diameter of worker before described to be: 160mm, and hole count is: 700-850, draw ratio is: 1: 3~3.5, the aperture is: 0.26~0.3mm.
To achieve these goals, the present invention can adopt following measure to realize, in the described cut-out packing process, and the shearing length of polypropylene fiber: 30~40mm.
Fig. 1 is the embodiments of the invention process charts;
In order to be illustrated more clearly in the present invention, the present invention is done further explanation below in conjunction with embodiment:
Embodiment 1:
The manufacturing process of fine-denier polypropylene staple fibre as shown in Figure 1 passes through after for polypropylene P.P section and the suitable blend of additive again and before spins, after spin manufacturing procedure and finish, additive is by antistatic additive: Zhu Bo Lasite 051 (being Drewp last051), lubricant: stearic acid etc., by a certain percentage: spin manufacturing procedure after compound the preparing and comprise cooling quench, coiling, boundling, one drawing-off, oil bath, two road drawing-offs, superheated steam, three road drawing-offs, finish application bath, curl, HEAT SETTING, cut-out packing.The temperature in screw rod five districts in the described fore-spinning is respectively: a district: 305 ℃, and two districts: 300 ℃, three districts: 295 ℃, four districts: 280 ℃, five districts: 275 ℃.The temperature in flange district is: 275 ℃, and the bend pipe district: 270 ℃, spinning manifold: 267 ℃, quench air velocity: 0.45m/min, wind-warm syndrome: 16 ℃, spin speed: 750m/min, preceding spinning oils: 1.5%, the precursor oil supply rate that wets: 15%.After spin boundling total denier in the manufacturing procedure: 660,000 dawn, the total draft multiple: 4, draw speed: 90m/min, draft temperature: 56 ℃ of oil baths, superheated steam: 110 ℃, the crimping machine master presses: 1.8kg/cm
2, back pressure: 1.2kg/cm
2Four district's temperature of HEAT SETTING are respectively: a district: 100 ℃, and two districts: 115 ℃, three districts: 125 ℃, four districts: the 95 ℃ of shearing length of cutting off the polypropylene fiber of packing process: 35mm.
Embodiment 2 with the difference of embodiment 1 is:
The spinning body temperature of spinning process is controlled at 270 ℃, quench air velocity: 0.5m/min, 20 ℃ of wind-warm syndrome are spun speed: 800m/min, before spin and oil 2%, the precursor oil supply rate that wets: 20%, after the boundling total denier that spins in the manufacturing procedure be controlled at for 700,000 dawn, total draft multiple: 3.5, draw speed: 100m/min, draft temperature: oil bath: 60 ℃, 115 ℃ of superheated steams, the crimping machine master presses two 1.9kg/cm
2, back pressure: 1.15kg/cm
2, shearing length 38mm.
Enforcement of the present invention has following advantages:
Fiber number can be carried out large-scale industrial production, technology at the fine-denier polypropylene fiber of 0.56~1.11dtex Advantages of simple, on the equipment of original production polypropylene fibre, suitably the adjusting process parameter can be produced raw material The source is abundant, and cheap, the product of producing has the advantages that to improve fabric feeling and wearability, is suitable Should popular consumption take material, wax sense that can the radical change chemical ﹠ blended fabric, wicking is better than other change Fine fabric, gas permeability is good, and feel has the same feel of natural fiber, and its style can reach with false Dai Zhen Degree.