CN102115937B - Preparation method of ultrahigh molecular weight polyethylene (UHMWPE) short fibers - Google Patents
Preparation method of ultrahigh molecular weight polyethylene (UHMWPE) short fibers Download PDFInfo
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Abstract
The invention provides a preparation method of ultrahigh molecular weight polyethylene (UHMWPE) short fibers, comprising the following steps: preheating UHMWPE long fibers at 40-60 DEG C; curling the preheated UHMWPE long fibers; sequentially carrying out first-stage drying, second-stage drying and third-stage drying on the curled UHMWPE long fibers, wherein in the first-stage drying, hot wind is blown to the UHMWPE long fibers in a direction from the bottom up, in the second-stage drying, the hot wind is blown to the UHMWPE long fibers in a direction from the top down, and the in the third-stage drying, the hot wind is blown to the UHMWPE long fibers in a direction from the top down; and cutting the dried UHMWPE long fibers into short fibers of 50-100mm. An anti-spike fabric prepared from the UHMWPE short fibers prepared in the invention has the advantages of uniform mechanical property and higher anti-spike grade.
Description
Technical field
The present invention relates to safety protection field, be specifically related to a kind of preparation method of ultra-high molecular weight polyethylene staple fibre.
Background technology
Anti-stabbing lining has important application in safety protection field, and the user wears by the stab-resistance body armor of anti-stabbing lining preparation can effectively resist external attack, thus ensure the safety of the person and property.
Mostly traditional anti-stabbing lining is that by aramid fiber be the raw material preparation, but the price of aramid fiber is comparatively expensive.In order to reduce production costs, the technique of anti-stabbing lining has appearred preparing as raw material take PE (polyethylene) fiber, Chinese patent literature CN101357010A discloses a kind of preparation method of soft stab-resistant insoles, in this patent, with one or more layers PE nonwoven fabric and one or more layers PE woven fabric compound suppressing moulding, the preparation process of PE nonwoven fabric is in the method: first by the standby PE short fiber of PE long fiber cutting, then the PE short fiber is carried out the acupuncture processing and make the PE nonwoven fabric.The shortcoming of this method is, the toughness of PE fiber is relatively poor, thereby affected the anti-stab performance of anti-stabbing lining, and needing that before the PE fiber is cut it is carried out drying processes, existing drying means is that the one direction that fiber carries out is from the bottom to top heated, and easily causes fiber local heating, affects the mechanical property of fiber, thereby make the anti prick function of the anti-stabbing lining that makes respectively bad to uniformity, the anti-stab poor performance of direction out of the ordinary.
Ultra-high molecular weight polyethylene (UHMWPE) fiber also claims high-strength high-modulus polyethylene (HSHMPE) fiber or elongation chain (ECPE) polyethylene fiber, and it is in (1～6) * 10 by relative molecular mass
6Polyethylene after spinning, super drawing, make.The superhigh molecular weight polyethylene fibers composite has lighter quality than other fibre reinforced composites, and better therefore dielectricity and resistance to impact are widely used in the fields such as Aero-Space, marine site defence, weaponry.Thus, the inventor considers to prepare anti-stabbing lining take superhigh molecular weight polyethylene fibers as raw material, in order to improve the mechanical property of anti-stabbing lining.The process for preparing anti-stabbing lining with superhigh molecular weight polyethylene fibers is: preparation ultra-high molecular weight polyethylene staple fibre → shredding → combing → lapping → acupuncture → gluing → hot-forming.But because there is larger difference in the mechanical property of superhigh molecular weight polyethylene fibers and common polythene fiber, so the technique of preparation PE staple fibre is not suitable for preparation ultra-high molecular weight polyethylene staple fibre in the prior art.Therefore need to provide a kind of method for the preparation of the ultra-high molecular weight polyethylene short fiber, for the preparation of anti-stabbing lining, can make the fabric of preparation have anti prick function homogeneous, higher everywhere by the super high molecular weight staple fibre of the method preparation.
Summary of the invention
The technical problem that the present invention solves is, a kind of method for the preparation of the ultra-high molecular weight polyethylene short fiber is provided, for the preparation of anti-stabbing lining, can make the fabric of preparation have anti prick function homogeneous, higher everywhere by the super high molecular weight staple fibre of the method preparation.
In order to solve above technical problem, the invention provides a kind of preparation method of ultra-high molecular weight polyethylene staple fibre, comprising:
Preheating: with the preheating under 40 ℃～60 ℃ condition of ultra-high molecular weight polyethylene long fiber;
Curling: as to carry out the ultra-high molecular weight polyethylene long fiber after the preheating curling;
Dry: it is dry the ultra-high molecular weight polyethylene long fiber after curling to carry out successively first order drying, second level drying, the third level, in the described first order drying, the hot blast direction blows to the top from the long stapled below of ultra-high molecular weight polyethylene, in the drying of the described second level, the hot blast direction blows to the below from the long stapled top of ultra-high molecular weight polyethylene, in the described third level drying, the hot blast direction blows to the below from the long stapled top of ultra-high molecular weight polyethylene;
Cutting: the short fiber that dried ultra-high molecular weight polyethylene long fiber is cut into 50mm～100mm.
Preferably, described preheat temperature of pining in advance fiber is 45 ℃～55 ℃.
Preferably, the process of described preheating is specially: the ultra-high molecular weight polyethylene long fiber is carried out preheating by hot-rolling.
Preferably, in the described dry run, the temperature of first order drying is 70 ℃～120 ℃.
Preferably, in the described dry run, the temperature of second level drying is 60 ℃～110 ℃.
Preferably, in the described dry run, the temperature of third level drying is 50 ℃～100 ℃.
Preferably, the dry speed of a motor vehicle that the described first order is dry, the second level is dry and the third level is dry is 80m/min～100m/min.
Preferably, before the ultra-high molecular weight polyethylene long fiber is carried out preheating, also comprise: with ultra-high molecular weight polyethylene long fiber uniform spreading.
Preferably, described process with ultra-high molecular weight polyethylene long fiber uniform spreading is specially: the fine long dimension of ultra-high molecular weight polyethylene is passed through friction piece with the tractive force of≤0.1g/d, make high-pressure electrostatic on the fiber band and uniform spreading, described friction piece is polygon rhombogen or the round of chromium oxide, magnesia or aluminium oxide material or its material coating;
Eliminate the high-pressure electrostatic on the fiber.
Preferably, the high-pressure electrostatic on the described elimination fiber is specially: will contact with carbon fiber friction brush with the ultra-high molecular weight polyethylene long fiber of static, eliminate the static on the fiber.
The invention provides a kind of preparation method of ultra-high molecular weight polyethylene staple fibre, the method is carried out first preheating with the ultra-high molecular weight polyethylene long fiber, eliminates the internal stress of fiber, promotes rolled efficiency, and convenient follow-up cutting action.It is dry that fiber is carried out carrying out successively after curling first order drying, second level drying and the third level, and control hot blast blowing direction makes fiber surface most of moisture evaporation drying for blow to the top from the long stapled below of ultra-high molecular weight polyethylene in the first drying; Control hot blast blowing direction is for blowing to the below in the drying of the second level from the long stapled top of ultra-high molecular weight polyethylene, avoid the too high ultra-high molecular weight polyethylene long fiber local heating that causes of conveyor belt temperature, stablize the long stapled mechanical property of ultra-high molecular weight polyethylene; Control hot blast blowing direction is for blowing to the below in the third level drying from the long stapled top of ultra-high molecular weight polyethylene, fiber surface moisture is fully evaporated, be easy to follow-up gluing process, and then the anti-stabbing lining that the ultra-high molecular weight polyethylene staple fibre by the present invention preparation is made has the mechanical property of homogeneous, and has higher anti-stab performance.
Description of drawings
The schematic flow sheet of Fig. 1 dry run;
Fig. 2 sprawls the fiber plant schematic diagram;
Fig. 3 static eraser schematic diagram.
The specific embodiment
In order further to understand the present invention, below in conjunction with embodiment the preferred embodiment of the invention is described, but should be appreciated that these describe just as further specifying the features and advantages of the present invention, rather than to the restriction of claim of the present invention.
The embodiment of the invention discloses a kind of preparation method of ultra-high molecular weight polyethylene staple fibre, comprising:
Preheating: with the preheating under 40 ℃～60 ℃ condition of ultra-high molecular weight polyethylene long fiber;
Curling: it is curling that the ultra-high molecular weight polyethylene long fiber after the preheating is carried out machine crimp;
Dry: it is dry the ultra-high molecular weight polyethylene long fiber after curling to carry out successively first order drying, second level drying, the third level, in the described first order drying, the hot blast direction blows to the below from the long stapled top of ultra-high molecular weight polyethylene, in the described third level drying, the hot blast direction blows to the below from the long stapled top of ultra-high molecular weight polyethylene;
Cutting: the short fiber that dried ultra-high molecular weight polyethylene long fiber is cut into 50mm～100mm.
For the spinning process of ultra-high molecular weight polyethylene, be preferably the fiber of gel spinning method preparation, for example can prepare by the gel spinning technique described in patent GB2042414A or WO01/73173.Gel spinning technique is comprised of following steps: preparation has the solution of the linear polyethylene of high intrinsic viscosity, this solution is spun into silk being higher than under the temperature of solution temperature, it is following producing gel that this silk is cooled to gelling temp, and before the desolventizing, during or later on drawn yarn to obtain superhigh molecular weight polyethylene fibers.According to the present invention, preferably adopting weight average molecular weight is (1.5～4.5) * 10
6Linear polyethylene carry out according to the method described above spinning.
The ultra-high molecular weight polyethylene long fiber is carried out curling before, in order to promote rolled efficiency, fiber is carried out the pre-heat treatment in order to remove the internal stress of fiber.According to the present invention, the ultra-high molecular weight polyethylene long fiber can effectively be removed the internal stress of fiber after the preheating in 40 ℃～60 ℃ scope, preferred, fiber is carried out preheating at 45 ℃～55 ℃.During pre-thermal fiber, can adopt the preheating of hot path, preferred, make fiber carry out preheating at 45 ℃～55 ℃ hot-rolling.For the mode of heating of warm-up mill, there is no particular restriction in the present invention, can adopt the modes well known to those skilled in the art such as electrical heating or hot air in hot-rolling.
The ultra-high molecular weight polyethylene long fiber imports coiling machine and carries out the machine crimp shaping with method well known to those skilled in the art after preheating, for crimping machine, can use equipment well known to those skilled in the art, and there is no particular restriction to this in the present invention.
Ultra-high molecular weight polyethylene long fiber after curling is sent into drying machine carry out successively that first order drying, the second level are dry, the third level is dry, be the schematic flow sheet of dry run among the present invention referring to Fig. 1, described ultra-high molecular weight polyethylene long fiber 4 undertaken by first order hothouse 1, second level hothouse 2, third level hothouse 3 successively first order drying, the second level are dry, the third level is dry, the direction that hot blast blows in the direction indication dry run of arrow among the figure.
Ultra-high molecular weight polyethylene long fiber 4 is before carrying out first order drying, fiber surface is attached with a large amount of moisture, when carrying out first order drying, the part moisture of fiber surface can become steam and move upward, so it is to blow to the top from the below of ultra-high molecular weight polyethylene long fiber 4 that the dry time control of the first order heats the wind direction, the heating direction is consistent with the steam direction of motion, is convenient to the most of moisture evaporation with fiber surface.
According to the present invention, the heating-up temperature of first order drying is preferably 70 ℃～120 ℃, and more preferably 85 ℃～110 ℃, the dry speed of a motor vehicle is preferably 80m/min～100m/min.
Ultra-high molecular weight polyethylene long fiber 4 is residual fraction water still through the dry rear surface of the first order, need ultra-high molecular weight polyethylene long fiber 4 is proceeded second level drying, and the temperature of conveyer belt 5 has risen to 60 ℃～70 ℃ at this moment, glass transition temperature near ultra-high molecular weight polyethylene, so the hot blast direction in the drying of the control second level is blown to the below from the top of ultra-high molecular weight polyethylene long fiber 4, reduce the further rising of conveyor belt temperature, prevent ultra-high molecular weight polyethylene long fiber 4 local heatings, stablize the mechanical property of ultra-high molecular weight polyethylene long fiber 4.
According to the present invention, the heating-up temperature of second level drying is preferably 60 ℃～110 ℃, and more preferably 75 ℃～105 ℃, the dry speed of a motor vehicle is preferably 80m/min～100m/min.
After ultra-high molecular weight polyethylene long fiber 4 carried out first order drying, second level drying successively, the fiber surface residual amount is about 1%～1.5%, for the moisture that makes ultra-high molecular weight polyethylene long fiber 4 surfaces fully dry, ultra-high molecular weight polyethylene long fiber 4 is carried out third level drying, in the third level drying, same in order to control the temperature of conveyer belt, the hot blast direction is blown to the below from the top of ultra-high molecular weight polyethylene long fiber 4.
According to the present invention, the heating-up temperature of third level drying is preferably 50 ℃～100 ℃, and more preferably 60 ℃～100 ℃, the dry speed of a motor vehicle is preferably 80m/min～100m/min.
For drying machine, can use equipment well known to those skilled in the art, there is no particular restriction to this in the present invention.
Dried fiber is imported cutting machine is cut to 50mm～100mm according to method well known to those skilled in the art short fiber, preferably cut into the short fiber of 60mm～90mm, can use equipment well known to those skilled in the art for cutting machine, there is no particular restriction to this in the present invention.
The ultra-high molecular weight polyethylene long fiber is curling evenly in order to make, uniform drying, before fiber is carried out preheating, also comprises: with ultra-high molecular weight polyethylene long fiber uniform spreading.When sprawling fiber, can adopt the technology among the patent US4916000: make fiber sprawl rod by two, fiber is 40 °～200 ° with the contact angle of sprawling rod, and the tension force that then fiber is applied 0.3g/d～0.6g/d launches fiber lay down.The preferred technology of describing among the patent CN1291090C that adopts: make fiber make static drawout on the fiber band with the drawing tension of≤0.1g/d by the friction piece friction, described friction piece is polygon prismatic body or the round of chromium oxide, magnesia or aluminium oxide material or its material coating, the quantity of friction piece can be one, also can be a plurality of.Because polyethylene fiber is a kind of insulator, when its ceramic material with insulating property (properties) rubs, very easily be with negative electricity, the static of this accumulation can be up to more than ten thousand volts, and is behind the high-pressure electrostatic, mutually exclusive between the fiber on the fiber band, can uniform spreading.After the static uniform spreading launches on the fiber band, need to eliminate the static on the fiber, the method for eliminating static can adopt Xelminator, and is preferred, the friction brush and static electrification fibre frictoin elimination static that adopt carbon fiber with excellent conductive performance to make.The idiographic flow schematic diagram is referring to Fig. 2, ultra high molecular polyethylene fiber spindle on the creel 11 is assembled bunchy through behind the creel 12, enter static eraser 14 via static generating apparatus 13 is laggard, static eraser 14 comprises the friction brush 14a (referring to Fig. 3) that is made by carbon fiber, because carbon fiber is good conductor, and has very high modulus, therefore be not easy distortion, can keep contacting fully with the ultra-high molecular weight polyethylene long fiber, take away static, and use carbon fiber as friction piece, be difficult for the fiber injury.
According to the present invention, the process that is prepared anti-stabbing lining by the ultra-high molecular weight polyethylene staple fibre is:
The ultra-high molecular weight polyethylene staple fibre is sent into opener to be carried out importing after the shredding carding machine and carries out combing, with the superhigh molecular weight polyethylene fibers after the combing in the lapping machine lapping that superposes, preferably the ultra-high molecular weight polyethylene staple fibre is carried out three layers of lapping, then three layers of fiber web are put into needing machine and carry out the acupuncture operation, make the ultra-high molecular weight polyethylene nonwoven fabric, needling density is preferably 1000 pins/cm
2～4000 pins/cm
2Described nonwoven fabric is carried out gluing with containing the elastomeric adhesive of polystyrene, described polystyrene elastomer is preferably polystyrene triblock copolymer body, SEBS more preferably, rise KARTON G-1650, the KARTON D-1161 that (KARTON) company produces such as section, gel content in the nonwoven fabric is 5wt%～15wt%, more preferably 8wt%～13wt%.Super nonwoven fabric after the gluing is sent into hydraulic press carry out hot-formingly after 80 ℃～100 ℃ dryings, the control heating-up temperature is that 80 ℃～150 ℃, pressure are that 15Mpa～30Mpa, press time are 5min～12min, makes anti-stabbing lining after hot-forming.Can use equipment well known to those skilled in the art for opener, carding machine, needing machine and hydraulic press, there is no particular restriction to this in the present invention.
In order further to understand the present invention, below in conjunction with embodiment the preparation method of ultra-high molecular weight polyethylene staple fibre provided by the invention is described.
1, fiber uniform spreading
The 400 dawn RYX90 superhigh molecular weight polyethylene fibers produced of Ningbo Rongyi Chemical Fibre Technology Co., Ltd. are placed on the creel 11, spindle on the creel is assembled bunchy through behind the creel 12, enter static eraser 14 via static generating apparatus 13 is laggard, eliminate static.
2, preheating
With the fiber of uniform spreading through the preheating under 50 ℃ temperature of overheated path.
3, curling.
4, drying
Curling ultra-high molecular weight polyethylene long fiber carried out successively first order drying, the second level are dry, the third level is dry:
4a, the ultra-high molecular weight polyethylene long fiber 4 after predrying is imported the first hothouse 1 carry out first order drying, control hot blast direction blows to the top from ultra-high molecular weight polyethylene long fiber below, and baking temperature is made as 105 ℃, and the speed of a motor vehicle is made as 90m/min;
4b, will import secondary drying chambers 2 through the dried ultra-high molecular weight polyethylene long fiber of the first order 4 and carry out second level drying, control hot blast direction blows to the below from ultra-high molecular weight polyethylene long fiber top, and baking temperature is made as 85 ℃, and the speed of a motor vehicle is made as 90m/min;
4c, will be through the second level dried ultra-high molecular weight polyethylene long fiber 4 import the 3rd hothouse 3 and carry out third level drying, and below control hot blast direction blowed to from the long alkene fiber of superhigh molecular weight polyethylene top, baking temperature was made as 75 ℃, and the speed of a motor vehicle is made as 90m/min.
5, cutting
Dried ultra-high molecular weight polyethylene long fiber is cut into the short fiber of 75cm.
Embodiment 2
1, fiber uniform spreading
Fiber uniform spreading process is with embodiment 1. in the present embodiment
2, preheating
With the fiber of uniform spreading through the preheating under 42 ℃ temperature of overheated path.
3, curling.
4, drying
Curling ultra-high molecular weight polyethylene long fiber carried out successively first order drying, the second level are dry, the third level is dry:
4a, curling ultra-high molecular weight polyethylene long fiber 4 is imported the first hothouse 1 carry out first order drying, control hot blast direction blows to the top from ultra-high molecular weight polyethylene long fiber 4 belows, and baking temperature is made as 100 ℃, and the speed of a motor vehicle is made as 85m/min;
4b, will importing secondary drying chambers through the dried ultra-high molecular weight polyethylene long fiber of the first order 4, to enter the 2 row second level dry, and control hot blast direction blows to the below from ultra-high molecular weight polyethylene long fiber top, and baking temperature is made as 70 ℃, and the speed of a motor vehicle is made as 85m/min;
4c, will be through the second level dried ultra-high molecular weight polyethylene long fiber 4 import the 3rd hothouse 3 and carry out third level drying, and control hot blast direction blows to the below from ultra-high molecular weight polyethylene long fiber top, and baking temperature is made as 60 ℃, and the speed of a motor vehicle is made as 85m/min.
5, cutting
Dried ultra-high molecular weight polyethylene long fiber is cut into the short fiber of 55cm.
Embodiment 3
1, fiber uniform spreading
Fiber uniform spreading process is with embodiment 1. in the present embodiment
2, preheating
With the fiber of uniform spreading through the preheating under 56 ℃ temperature of overheated path.
3, curling.
4, drying
Curling ultra-high molecular weight polyethylene long fiber carried out successively first order drying, the second level are dry, the third level is dry:
4a, curling ultra-high molecular weight polyethylene long fiber 4 is imported the first hothouse 1 carry out first order drying, control hot blast direction blows to the top from ultra-high molecular weight polyethylene long fiber below, and baking temperature is made as 110 ℃, and the speed of a motor vehicle is made as 95m/min;
4b, will import secondary drying chambers 2 through the dried ultra-high molecular weight polyethylene long fiber of the first order 4 and carry out second level drying, control hot blast direction blows to the below from ultra-high molecular weight polyethylene long fiber top, and baking temperature is made as 100 ℃, and the speed of a motor vehicle is made as 95m/min;
4c, will be through the second level dried ultra-high molecular weight polyethylene long fiber 4 import the 3rd hothouse 3 and carry out third level drying, and control hot blast direction blows to the below from ultra-high molecular weight polyethylene long fiber top, and baking temperature is made as 95 ℃, and the speed of a motor vehicle is made as 95m/min.
5, cutting
Dried ultra-high molecular weight polyethylene long fiber is cut into the short fiber of 85cm.
1, preheating
With the 400 dawn RYX90 superhigh molecular weight polyethylene fibers produced of Ningbo Rongyi Chemical Fibre Technology Co., Ltd. through the preheating under 50 ℃ temperature of overheated path.
2, curling.
3, drying
Dry run is with embodiment 1 in the present embodiment.
4, cutting
Cutting process is with embodiment 1 in the present embodiment.
The superhigh molecular weight polyethylene fibers of embodiment 1 to 4 preparation is prepared anti-stabbing lining in accordance with the following steps, and the anti-stabbing lining numbering of preparation is followed successively by a, b, c, d:
The ultra-high molecular weight polyethylene staple fibre of embodiment 1 preparation is carried out shredding, combing;
Superhigh molecular weight polyethylene fibers after the combing is carried out three at lapping machine stackedly add lapping;
Three layers of fiber web are carried out acupuncture, make the ultra-high molecular weight polyethylene nonwoven fabric, needling density is 3000 pins/cm
2
To carry out gluing in the described nonwoven fabric importing gluing groove, the gel content in the nonwoven fabric is 10wt%, fills the adhesive of following composition in the gluing groove:
KARTON G-1650 13wt％
Rosin 2wt%
No. 120 solvent naphtha (2,3-diacetyl surpluses
Fiber web after the gluing is hot-forming after 90 ℃ of dryings, and hot pressing temperature is set is 110 ℃, pressure is that 22Mpa, hot pressing time are 8min, makes anti-stabbing lining.
Respectively along the test cloth of three 50cm * 50cm of diagonal intercepting, numbering is followed successively by a1, a2, a3 with a, b, four sample cloth of c, d, b 1, b2, b3, and c 1, c2, c3, d1, d2, d3 carry out anti-puncture test with described test cloth.
Anti-puncture test testing standard: the two sharp knife daggers that with quality are 2.6kg place test cloth top with certain altitude, and the dagger time stamp test cloth that falls is observed cloth and punctured degree, the degree of puncturing is divided into Three Estate: do not pierce through, slightly puncture, pierce through fully, test result row and table 1.
Table 1 cutting resistance test result
The above results as can be known, prepare the ultra-high molecular weight polyethylene short fiber according to method provided by the invention, the anti-stabbing lining that makes through shredding, combing, lapping, acupuncture, gluing, after hot-forming at short fiber thus has the mechanical property of homogeneous, all can bear at least the energy of pinking of 25J, have higher anti-stab grade.
The explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof.Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of claim of the present invention.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be apparent concerning those skilled in the art, and General Principle as defined herein can in the situation that does not break away from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (6)
1. the preparation method of a ultra-high molecular weight polyethylene staple fibre comprises:
Preheating: with the preheating under 40 ℃～60 ℃ condition of ultra-high molecular weight polyethylene long fiber;
Curling: as to carry out the ultra-high molecular weight polyethylene long fiber after the preheating curling;
Dry: that the ultra-high molecular weight polyethylene long fiber after curling is carried out first order drying successively, the second level is dry, the third level is dry, in the described first order drying, the hot blast direction blows to the top from the long stapled below of ultra-high molecular weight polyethylene, in the drying of the described second level, the hot blast direction blows to the below from the long stapled top of ultra-high molecular weight polyethylene, in the described third level drying, the hot blast direction blows to the below from the long stapled top of ultra-high molecular weight polyethylene, the temperature of first order drying is 70 ℃～120 ℃, the temperature of second level drying is 60 ℃～110 ℃, and the temperature of third level drying is 50 ℃～100 ℃;
Cutting: the short fiber that dried ultra-high molecular weight polyethylene long fiber is cut into 50mm～100mm;
Before the ultra-high molecular weight polyethylene long fiber is carried out preheating, also comprise: with ultra-high molecular weight polyethylene long fiber uniform spreading.
2. method according to claim 1 is characterized in that, described preheat temperature of pining in advance fiber is 45 ℃～55 ℃.
3. method according to claim 1 is characterized in that, the process of described preheating is specially: the ultra-high molecular weight polyethylene long fiber is carried out preheating by hot-rolling.
4. method according to claim 1 is characterized in that, the dry speed of a motor vehicle that the described first order is dry, the second level is dry and the third level is dry is 80m/min～100m/min.
5. method according to claim 1 is characterized in that, described process with ultra-high molecular weight polyethylene long fiber uniform spreading is specially:
With the ultra-high molecular weight polyethylene long fiber with the tractive force of≤0.1g/d by friction piece, make high-pressure electrostatic on the fiber band and uniform spreading, described friction piece is polygon rhombogen or the round of chromium oxide, magnesia or aluminium oxide material or its material coating;
Eliminate the high-pressure electrostatic on the fiber.
6. method according to claim 5 is characterized in that, the high-pressure electrostatic on the described elimination fiber is specially: will contact with carbon fiber friction brush with the ultra-high molecular weight polyethylene long fiber of static, eliminate the static on the fiber.
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| CN101016667A (en) * | 2007-03-02 | 2007-08-15 | 时准 | Spinning method for super high molecular weight polythene chopping fiber |
| CN101165255A (en) * | 2002-07-29 | 2008-04-23 | 纳幕尔杜邦公司 | Method and apparatus for heating nonwoven webs |
| CN101357010A (en) * | 2008-09-28 | 2009-02-04 | 湖南中泰特种装备有限责任公司 | Production method of soft stab-resistant insoles |
| CN101525775A (en) * | 2008-03-04 | 2009-09-09 | 上海斯瑞聚合体科技有限公司 | Drying process for high-strength and high-modulus ultrahigh molecular weight polyethylene fibre |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS5637316A (en) * | 1979-08-29 | 1981-04-11 | Toray Ind Inc | Production of staple fiber for spinning |
| JPH0719741A (en) * | 1992-11-13 | 1995-01-20 | Wakayama Iron Works Ltd | Device for drying cloth with hot air |
| JPH0768544A (en) * | 1993-09-01 | 1995-03-14 | Showa Denko Kk | Impregnation of fiber bundle with resin |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1011261B (en) * | 1986-12-15 | 1991-01-16 | 欧文斯-科尔宁格·费伯格拉斯公司 | Method and apparatus for heating mineral fibers |
| CN1172244A (en) * | 1996-07-30 | 1998-02-04 | 平冈忠士 | Treatment device before hot air dried for fibre product and vacuum packing device |
| CN101165255A (en) * | 2002-07-29 | 2008-04-23 | 纳幕尔杜邦公司 | Method and apparatus for heating nonwoven webs |
| CN101016667A (en) * | 2007-03-02 | 2007-08-15 | 时准 | Spinning method for super high molecular weight polythene chopping fiber |
| CN101525775A (en) * | 2008-03-04 | 2009-09-09 | 上海斯瑞聚合体科技有限公司 | Drying process for high-strength and high-modulus ultrahigh molecular weight polyethylene fibre |
| CN101357010A (en) * | 2008-09-28 | 2009-02-04 | 湖南中泰特种装备有限责任公司 | Production method of soft stab-resistant insoles |
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