CN103203854B - A kind of process of MODIFIED PP material secondary coating - Google Patents
A kind of process of MODIFIED PP material secondary coating Download PDFInfo
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- CN103203854B CN103203854B CN201310085476.5A CN201310085476A CN103203854B CN 103203854 B CN103203854 B CN 103203854B CN 201310085476 A CN201310085476 A CN 201310085476A CN 103203854 B CN103203854 B CN 103203854B
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- extruder
- loose tube
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- optical fiber
- pulling equipment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/05—Filamentary, e.g. strands
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/919—Thermal treatment of the stream of extruded material, e.g. cooling using a bath, e.g. extruding into an open bath to coagulate or cool the material
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Light Guides In General And Applications Therefor (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
Abstract
The invention discloses the process of a kind of MODIFIED PP material secondary coating, utilize optical fiber pay-off rack identical tension releasing from draw drum by multifiber and water blocking yarn；Enter stranding machine；Subsequently into increasing sliding device, the outer surface of optical fiber and water blocking yarn is coated with last layer slip additive；Extruder sent into by MODIFIED PP material, and the air-filled pore being arranged on extruder is inflated in Loose tube；The Loose tube of extrusion enters hot water storgae, presses traction by the formula traction apparatus of pressing being arranged in hot water storgae；Then being drawn by main traction apparatus, the speed of main traction apparatus is less than the speed pressing formula traction apparatus；Then, enter in bosh and cool down, sequentially pass through secondary traction machine subsequently, receive framed bent take-up.The method uses dry sleeve to replace ointment filled type, and, it is achieved that it is the technique that raw material carries out secondary coating with cheap MODIFIED PP (polypropylene), is greatly reduced " after-contraction " phenomenon of MODIFIED PP, has captured technical barrier, greatly reduced cost.
Description
Technical field
The present invention relates to the manufacture method of Loose tube in a kind of optical cable, the particularly process of MODIFIED PP material secondary coating.
Background technology
In communications optical cable, no matter it is layer-stranding cable or central-beam tube type fiber optic cable, its elementary cell is optical fiber loose tube, PBT(polybutylene terephthalate (PBT) is generally used as the making material of optical fiber loose tube in communications optical cable), PBT material is widely adopted because having the advantages such as high Young's modulus and low-expansion coefficient.But PBT price is high, and hydrolytic resistance is poor, the shortcomings such as buckle resistance is poor, and in extrusion process, have post-extrusion shrinkage phenomenon, thus affect optical fiber excess length control in Loose tube.And in current market, fiber optic cable manufacture enterprise requirements Loose tube ensures in the case of certain rigidity, having good toughness, but PBT expects through repeatedly improving, still suffer from surface strength too hard, bending radius is big, the deficiency such as easy damaged during distortion.
PP(polypropylene) it is a kind of conventional plastics, it is cheap, and degree of crystallinity is high, compound with regular structure, thus has good mechanical property, good heat resistance and chemical stability.But because the regularity of itself molecular structure is high, thus its impact strength is poor.So needing polypropylene material is modified, to realize being used for polypropylene material the making of optical fiber loose tube.In traditional Loose tube production process, the speed of extruder with in put traction machine Tong Bu, to control the parameters such as the Diameter Wall of Loose tube, but in put traction machine drag spring thimble time, sleeve pipe is stretched, owing to the sleeve pipe crystallization process of PP material is slow, the time is longer, when sleeve pipe puts traction machine pulling equipment in ingressing and egressing out, crystallization process is still continuing, causing more than sleeve pipe inner fiber long excessive, after-contraction is big, it is impossible to meet the requirement of properties of product.
Summary of the invention
It is an object of the invention to overcome defect present in prior art, provide the process of a kind of MODIFIED PP material secondary coating, the method uses dry sleeve to replace ointment filled type, and, achieving with cheap MODIFIED PP (polypropylene) is the technique that raw material carries out secondary coating, it is greatly reduced " after-contraction " phenomenon of MODIFIED PP, greatly reduces cost.
For achieving the above object, the technical scheme is that and provide the process of a kind of MODIFIED PP material secondary coating, it is characterised in that
Step one: utilizing optical fiber pay-off rack identical tension releasing from draw drum by multifiber and water blocking yarn, described pay off rack is equipped with electronic control system, and described electronic control system carries out Synchronization Control to multifiber；
Step 2: after described pay off rack releases optical fiber and water blocking yarn, enters stranding machine, releases after stranded；
Step 3: then, described optical fiber and water blocking yarn enter and increase sliding device, increase in sliding device described, the outer surface of described optical fiber and water blocking yarn is coated with last layer slip agent；
Step 4: MODIFIED PP material sends into the charging aperture of extruder through pay-off, it is made to enter extruder inside under the effect of screw rod and melt in the thermal treatment zone, simultaneously, the described optical fiber and the water blocking yarn that scribble described slip agent enter extruder by fibre-optic catheter, being provided with the Loose tube that the extruder extrusion of air-filled pore is melted, air-filled pore is inflated in described melted Loose tube；
Step 5: described melted Loose tube carries optical fiber and water blocking yarn and enters hot water storgae, is provided with and presses pulling equipment in described hot water storgae, described Loose tube pass through described in press pulling equipment and carry out pressing traction, and initial crystallization molding in described hot water storgae；
Step 6: described Loose tube is drawn by main pulling equipment again, the speed of described main pulling equipment is less than the speed pressing pulling equipment；
Step 7: described Loose tube enters and can be formed in the most remaining long cold rinse bank；
Step 8: subsequently, described Loose tube sequentially passes through secondary pulling equipment, receives framed bent take-up；
Wherein, preferred technical scheme is, in described step 4, extruder uses barrier-type screw design；
Wherein, preferred technical scheme is, described extruder draw ratio is 25:1；
Wherein, preferred technical scheme is, extruder Heating Zone Temperature described in described step 4 is distributed: 1 210-220 DEG C of district；2 220-232 DEG C of districts；3 222-232 DEG C of districts；4 220-230 DEG C of districts；5 220-240 DEG C of districts；6 220-230 DEG C of districts；Head 225-235 DEG C；
Wherein, preferred technical scheme is, the draw ratio < 6 of the extrusion Loose tube of extruder described in described step 4；
Wherein, preferred technical scheme is, described draw ratio is 4-5；
Wherein, preferred technical scheme is, in described step 5, in described hot water storgae, temperature is 75-85 DEG C, described in press the speed of pulling equipment be 400 ms/min-500 ms/min；
Wherein, preferred technical scheme is, the speed of the main pulling equipment in described step 6 is 320 ms/min-380 ms/min；
Wherein, preferred technical scheme is, in described step 7, in described cold rinse bank, temperature is 20-25 DEG C；
Wherein, preferred technical scheme is, described extruder temperature is distributed: 1 215 DEG C of district；2 230 DEG C of districts；3 230 DEG C of districts；4 230 DEG C of districts；5 230 DEG C of districts；6 230 DEG C of districts；Head 230 DEG C.
Advantages of the present invention and having the beneficial effects that: the present invention is transformed into dry sleeve by ointment filled type and produces, and water-proofing powder and water blocking yarn are more cheap than ointment, also reduce further cost while environmental protection；In step 3, the outer surface of optical fiber and water blocking yarn is plated last layer slip additive so that between optical fiber and Loose tube, coefficient of friction reduces, play the effect reducing excess fiber length；In step 4, air-filled pore is inflated in Loose tube, supports Loose tube with air pressure, controls internal diameter and the roundness of Loose tube；In traditional Loose tube production process, the speed of extruder with in put traction machine Tong Bu, to control the parameters such as the Diameter Wall of Loose tube, but when putting traction machine drag spring thimble in, sleeve pipe is stretched, owing to the sleeve pipe crystallization process of PP material is slow, time is longer, when sleeve pipe puts traction machine pulling equipment in ingressing and egressing out, crystallization process is still continuing, cause more than sleeve pipe inner fiber long excessive, after-contraction is big, the requirement of properties of product can not be met, in step 5 of the present invention, increase and press traction apparatus, at this moment the diameter of sleeve pipe and wall thickness Tong Bu control yet by extruder and main traction machine, but sleeve pipe is before entering into main traction machine, effect is pressed by pressing formula traction machine.Its principle is: sleeve pipe is stretched before pressing formula traction machine, but owing to pressing formula hauling speed higher than main hauling speed after pressing formula traction machine, sleeve pipe is compressed.The lattice of PP material internal tends to well be compensated, and therefore, after sleeve and cooling, existing " after-contraction " phenomenon is substantially reduced, even close to " zero shrinks ".Owing to after-contraction and remaining length are controlled, MODIFIED PP compatible materials, in high speed extrusion, can have high speed of production, extra production capacity to increase.
Accompanying drawing explanation
Accompanying drawing is the process chart of secondary coating of the present invention.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, the detailed description of the invention of the present invention is further described.Following example are only used for clearly illustrating technical scheme, and can not limit the scope of the invention with this.
Embodiment 1
A kind of process of MODIFIED PP material secondary coating,
Step one: utilizing optical fiber pay-off rack identical tension releasing from draw drum by multifiber and water blocking yarn, described pay off rack is equipped with electronic control system, and described electronic control system carries out Synchronization Control to multifiber；
Step 2: after described pay off rack releases optical fiber and water blocking yarn, enters stranding machine, releases after stranded；
Step 3: then, described optical fiber and water blocking yarn enter and increase sliding device, increase in sliding device described, the outer surface of described optical fiber and water blocking yarn is coated with last layer slip agent；
Step 4: MODIFIED PP material sends into the charging aperture of extruder through pay-off, it is made to enter extruder inside under the effect of screw rod and melt in the thermal treatment zone, simultaneously, the described optical fiber and the water blocking yarn that scribble described slip agent enter extruder by fibre-optic catheter, being provided with the Loose tube that the extruder extrusion of air-filled pore is melted, air-filled pore is inflated in described melted Loose tube；
Step 5: described melted Loose tube carries optical fiber and water blocking yarn and enters hot water storgae, is provided with and presses pulling equipment in described hot water storgae, described Loose tube pass through described in press pulling equipment and carry out pressing traction, and initial crystallization molding in described hot water storgae；
Step 6: described Loose tube is drawn by main pulling equipment again, the speed of described main pulling equipment is less than the speed pressing pulling equipment；
Step 7: described Loose tube enters and can be formed in the most remaining long cold rinse bank；
Step 8: subsequently, described Loose tube sequentially passes through secondary pulling equipment, receives framed bent take-up.
Wherein, in step 4, extruder uses barrier-type screw design；
Wherein, extruder draw ratio is 25:1；
Wherein, the draw ratio of the extrusion of extruder described in step 4 Loose tube is 5；
Wherein, in step 5, in described hot water storgae, temperature is 75 DEG C, described in press the speed of pulling equipment be 400 ms/min；
Wherein, the speed of the main pulling equipment in step 6 is 350 ms/min；
Wherein, in step 7, in described cold rinse bank, temperature is 22 DEG C；
Wherein, extruder temperature distribution: 1 215 DEG C of district；2 230 DEG C of districts；3 230 DEG C of districts；4 230 DEG C of districts；5 230 DEG C of districts；6 230 DEG C of districts；Head 230 DEG C.
Embodiment 2
A kind of process of MODIFIED PP material secondary coating:
Step one: utilizing optical fiber pay-off rack identical tension releasing from draw drum by multifiber and water blocking yarn, described pay off rack is equipped with electronic control system, and described electronic control system carries out Synchronization Control to multifiber；
Step 2: after described pay off rack releases optical fiber and water blocking yarn, enters stranding machine, releases after stranded；
Step 3: then, described optical fiber and water blocking yarn enter and increase sliding device, increase in sliding device described, the outer surface of described optical fiber and water blocking yarn is coated with last layer slip agent；
Step 4: MODIFIED PP material sends into the charging aperture of extruder through pay-off, it is made to enter extruder inside under the effect of screw rod and melt in the thermal treatment zone, simultaneously, the described optical fiber and the water blocking yarn that scribble described slip agent enter extruder by fibre-optic catheter, being provided with the Loose tube that the extruder extrusion of air-filled pore is melted, air-filled pore is inflated in described melted Loose tube；
Step 5: described melted Loose tube carries optical fiber and water blocking yarn and enters hot water storgae, is provided with and presses pulling equipment in described hot water storgae, described Loose tube pass through described in press pulling equipment and carry out pressing traction, and initial crystallization molding in described hot water storgae；
Step 6: described Loose tube is drawn by main pulling equipment again, the speed of described main pulling equipment is less than the speed pressing pulling equipment；
Step 7: described Loose tube enters and can be formed in the most remaining long cold rinse bank；
Step 8: subsequently, described Loose tube sequentially passes through secondary pulling equipment, receives framed bent take-up.
Wherein, in step 4, extruder uses barrier-type screw design；
Wherein, extruder draw ratio is 25:1；
Wherein, the distribution of extruder Heating Zone Temperature described in step 4: 1 district 210；2 221 DEG C of districts；3 districts 222；4 220 DEG C of districts；5 224 DEG C of districts；6 230 DEG C of districts；Head 225 DEG C；
Wherein, the draw ratio of the extrusion of extruder described in step 4 Loose tube is 4；
Wherein, in step 5, in described hot water storgae, temperature is 85 DEG C, described in press the speed of pulling equipment be 500 ms/min；
Wherein, the speed of the main pulling equipment in step 6 is 380 ms/min；
Wherein, in step 7, in described cold rinse bank, temperature is 25 DEG C.
Embodiment 3
A kind of process of MODIFIED PP material secondary coating:
Step one: utilizing optical fiber pay-off rack identical tension releasing from draw drum by multifiber and water blocking yarn, described pay off rack is equipped with electronic control system, and described electronic control system carries out Synchronization Control to multifiber；
Step 2: after described pay off rack releases optical fiber and water blocking yarn, enters stranding machine, releases after stranded；
Step 3: then, described optical fiber and water blocking yarn enter and increase sliding device, increase in sliding device described, the outer surface of described optical fiber and water blocking yarn is coated with last layer slip agent；
Step 4: MODIFIED PP material sends into the charging aperture of extruder through pay-off, it is made to enter extruder inside under the effect of screw rod and melt in the thermal treatment zone, simultaneously, the described optical fiber and the water blocking yarn that scribble described slip agent enter extruder by fibre-optic catheter, being provided with the Loose tube that the extruder extrusion of air-filled pore is melted, air-filled pore is inflated in described melted Loose tube；
Step 5: described melted Loose tube carries optical fiber and water blocking yarn and enters hot water storgae, is provided with and presses pulling equipment in described hot water storgae, described Loose tube pass through described in press pulling equipment and carry out pressing traction, and initial crystallization molding in described hot water storgae；
Step 6: described Loose tube is drawn by main pulling equipment again, the speed of described main pulling equipment is less than the speed pressing pulling equipment；
Step 7: described Loose tube enters and can be formed in the most remaining long cold rinse bank；
Step 8: subsequently, described Loose tube sequentially passes through secondary pulling equipment, receives framed bent take-up.
Wherein, in step 4, extruder uses barrier-type screw design；
Wherein, extruder draw ratio is 25:1；
Wherein, the distribution of extruder Heating Zone Temperature described in step 4: 1 district 215；2 226 DEG C of districts；3 districts 228；4 225 DEG C of districts；5 230 DEG C of districts；6 225 DEG C of districts；Head 232 DEG C；
Wherein, the draw ratio of the extrusion of extruder described in step 4 Loose tube is 4.5；
Wherein, in step 5, in described hot water storgae, temperature is 80 DEG C, described in press the speed of pulling equipment be 450 ms/min；
Wherein, in the hot water storgae in step 6 temperature be the speed of main pulling equipment be 320 ms/min；
Wherein, in step 7, in described cold rinse bank, temperature is 23 DEG C.
The above is only the preferred embodiment of the present invention; it should be pointed out that, for those skilled in the art, on the premise of without departing from the technology of the present invention principle; can also make some improvements and modifications, these improvements and modifications also should be regarded as protection scope of the present invention.
Claims (2)
1. the process of a MODIFIED PP material secondary coating, it is characterised in that
Step one: utilizing optical fiber pay-off rack identical tension releasing from draw drum by multifiber and water blocking yarn, described pay off rack is equipped with electronic control system, and described electronic control system carries out Synchronization Control to multifiber；
Step 2: after described pay off rack releases optical fiber and water blocking yarn, enters stranding machine, releases after stranded；
Step 3: then, described optical fiber and water blocking yarn enter and increase sliding device, increase in sliding device described, the outer surface of described optical fiber and water blocking yarn is coated with last layer slip agent；
Step 4: MODIFIED PP material sends into the charging aperture of extruder through pay-off, it is made to enter extruder inside under the effect of screw rod and melt in the thermal treatment zone, simultaneously, the described optical fiber and the water blocking yarn that scribble described slip agent enter extruder by fibre-optic catheter, being provided with the Loose tube that the extruder extrusion of air-filled pore is melted, air-filled pore is inflated in described melted Loose tube；
Step 5: described melted Loose tube carries optical fiber and water blocking yarn and enters hot water storgae, is provided with and presses pulling equipment in described hot water storgae, described Loose tube pass through described in press pulling equipment and carry out pressing traction, and initial crystallization molding in described hot water storgae；
Step 6: described Loose tube is drawn by main pulling equipment again, the speed of described main pulling equipment is less than the speed pressing pulling equipment；
Step 7: described Loose tube enters and can be formed in the most remaining long cold rinse bank；
Step 8: subsequently, described Loose tube sequentially passes through secondary pulling equipment, receives framed bent take-up；
In described step 4, extruder uses barrier-type screw design；Described extruder draw ratio is 25:1；The draw ratio < 6 of the extrusion Loose tube of extruder described in described step 4；In described step 5, in described hot water storgae, temperature is 75-85 DEG C, described in press the speed of pulling equipment be 400 ms/min-500 ms/min；The speed of the main pulling equipment in described step 6 is 320 ms/min-380 ms/min；Extruder Heating Zone Temperature described in step 4 is distributed: 1 210-220 DEG C of district；2 220-232 DEG C of districts；3 222-232 DEG C of districts；4 220-230 DEG C of districts；5 220-240 DEG C of districts；6 220-230 DEG C of districts；Head 225-235 DEG C；In described step 7, in described cold rinse bank, temperature is 20-25 DEG C.
2. the process of MODIFIED PP material secondary coating as claimed in claim 1, it is characterised in that described extruder temperature is distributed: 1 215 DEG C of district；2 230 DEG C of districts；3 230 DEG C of districts；4 230 DEG C of districts；5 230 DEG C of districts；6 230 DEG C of districts；Head 230 DEG C.
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| CN201310085476.5A CN103203854B (en) | 2013-03-18 | 2013-03-18 | A kind of process of MODIFIED PP material secondary coating |
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| CN201310085476.5A CN103203854B (en) | 2013-03-18 | 2013-03-18 | A kind of process of MODIFIED PP material secondary coating |
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| CN104483739B (en) * | 2014-12-25 | 2017-03-22 | 南京华信藤仓通信有限公司 | Method for producing thin wall type low-smoke zero-halogen dry loose tubes |
| CN104608357B (en) * | 2014-12-30 | 2017-04-12 | 长飞光纤光缆股份有限公司 | Mold for inflating, filling and forming of full-dry optical-cable loose tube |
| CN105546807A (en) * | 2015-12-25 | 2016-05-04 | 天津奥林奥克通信科技有限公司 | Electric heating equipment |
| CN105500662B (en) * | 2015-12-29 | 2018-03-20 | 长飞光纤光缆沈阳有限公司 | A kind of optical cable loose tube shrinkage compensating device of optical fiber secondary mould set |
| CN105807381A (en) * | 2016-05-24 | 2016-07-27 | 烽火通信科技股份有限公司 | Full-dry type fiber ribbon loose tube and manufacturing method thereof |
| JP6382387B1 (en) | 2017-04-14 | 2018-08-29 | 株式会社フジクラ | Optical fiber cable manufacturing method and optical fiber cable manufacturing apparatus |
| CN107775941A (en) * | 2017-11-07 | 2018-03-09 | 长飞光纤光缆股份有限公司 | A kind of optical fiber secondary coating excess length control method and device |
| CN109760285A (en) * | 2019-03-19 | 2019-05-17 | 安徽盈通光电科技有限公司 | A kind of connection with fibre coating machine |
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| US4154783A (en) * | 1975-05-14 | 1979-05-15 | The Post Office | Process for producing dielectric optical waveguides |
| CN102346286B (en) * | 2011-11-21 | 2013-06-26 | 江苏江扬电缆有限公司 | Manufacturing method of full-dry optical cable loose tube |
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Effective date of registration: 20160803 Address after: 214400 Wuxi Province, Jiangyin City, the town of the town of Huang Zhen Xing Road, No. 58 Patentee after: Jiangyin Echosens Burton Polymer Co., Ltd. Address before: 214400, 188, VIP Road, Lingang New Town, Jiangyin, Jiangsu, Wuxi Patentee before: Jiangyin Excen Communic Ation Material Co.,Ltd. |