CN106380791A - Indoor or outdoor fully-dried tube directly-laid drop fiber optic cable and manufacture method thereof - Google Patents

Abstract

The invention discloses an indoor or outdoor fully-dried tube directly-laid drop fiber optic cable, which comprises an optical fiber and a PBT casing sleeving the optical fiber, wherein the PBT casing is internally provided with water-blocking yarn and water-blocking aramid fiber. According to the drop fiber optic cable, defects of a conventional butterfly-shaped drop fiber optic cable are overcome, metal reinforcements of the conventional butterfly-shaped drop fiber optic cable are abandoned, and full-dielectric materials are adopted to make the whole cross section free of any metal component. The drop fiber optic cable can naturally shield thunder and lightning and is extremely high in use safety. The flame-retardant PBT material is adopted and has characteristics of high modulus, large shore hardness, low contraction, ultraviolet resistance, and flame retardance. The PBT material allows mechanical property, ultraviolet resistance and flame resistance of the drop fiber optic cable to be improved, so that the drop fiber optic cable meets the basic requirements of indoor and outdoor installation.

Description

Indoor and outdoor dry type beam tube direct application type leading in cable and its manufacture method

Technical field

The present invention relates to optical cable field is and in particular to a kind of indoor and outdoor dry type beam tube direct application type leading in cable and its system Preparation Method.

Background technology

With the continuous development of network technology, it is irreversible to have become as in communication network access aspect implementation light entering and copper back Trend.Fiber optic communication has the advantages that message capacity is big, quality is high, stable performance, anti-electromagnetic interference, strong security, be to send out The long-range solution of exhibition broadband access.

With the continuous growth of the constantly progressive of fiber entering household (FTTH) technology and wideband requirements, how by optical fiber from access The fiber distribution point of net is incorporated into user side and has become as hot technology of concern；Generally this section of optical cable is referred to as by we Leading in cable.Although FTTH develops nearly 10 years in China, the breed structure of indoor optical cable is relatively single.The communications industry at present Indoor optical cable substantially can be divided into two classes：One class is built on stilts introducing, and this system of laying is suitable for user's scattered settlement situation and shaft tower The situation of resource relative abundance, optical cable is generally self-bearing type butterfly optical cable or other types optical cable；Another kind of is that pipeline introduces, should System of laying is suitable for relative abundant, the optical cable generally non-self-bearing type butterfly optical cable of urban area communication pipe resource.

Traditional butterfly leading in cable advantage of lower cost itself, but there are some obvious shortcomings：

1. structure is not quite reasonable, optical fiber index susceptible, thus affecting to use and life of product；2. because there is steel wire Or FRP, optical cable bending property itself receives restriction；3. optical cable is more fragile in laid processes, and easily all breaking fibre occur, to light Fine protectiveness is poor；4. Cable Core Number has certain restriction；5. permeability performance is bad；6. optical cable anti-ultraviolet property is bad, Condition slightly badly area need special pipeline protection optical cable, increase laid down cost.

Accordingly, it is now desired to a kind of indoor and outdoor dry type beam tube direct application type leading in cable substitutes traditional butterfly introduce Optical cable.

Content of the invention

It is an object of the invention to the problem above overcoming prior art to exist, provide a kind of indoor and outdoor dry type beam tube Direct application type leading in cable and its manufacture method, the optical cable of the present invention can solve the problem that the defect of traditional butterfly leading in cable, abandons The metal reinforcement of traditional butterfly optical cable, using all dielectric material so that its global sections does not contain any metal ingredient, to thunder and lightning There is natural screening, there is high safety in utilization, using flame-retardant PBT material, this material has high-moduluss, shore hardness Greatly, lower shrinkage, uvioresistant, fire-retardant feature, on the one hand improve the mechanical performance of product, on the other hand improve product Anti-uv-ray and fire resistance are so as to the basic demand that outdoor laid and interior are laid can be met.

For realizing above-mentioned technical purpose, reach above-mentioned technique effect, the present invention is achieved through the following technical solutions：

Indoor and outdoor dry type beam tube direct application type leading in cable, it includes optical fiber and is set in the PBT of described outer fiber Sleeve pipe, is provided with water blocking yarn and waterproofing type aramid fiber in described PBT sleeve pipe, in parts by weight, the formula of described PBT shell material Include：

Wherein, the preparation of described PBT shell material comprises the following steps：

Step one, get the raw materials ready according to each component in formula, be dried；

Step 2, PBT, the half of amount of flame-retardant agent, toughener, coupling agent, lubricant, antioxidant, uvioresistant Agent, light stabilizer UV-9, nucleant agent N AP-53F put in high-speed mixer, mix homogeneously；

Step 3, the material of mix homogeneously in step 2 is put into extruding pelletization in double screw extruder, screw speed is 25-60r/min, temperature is 240-260 DEG C, and injection pressure is 50-100PMa, obtains master batch；

Second half of master batch in step 4, step 3 and amount of flame-retardant agent is mixed homogeneously, and then puts into glass fibre The extruding pelletization to double screw extruder, screw speed is 25-60r/min, and temperature is 240-260 DEG C, and injection pressure is 50- 100PMa, obtains PBT master batch；

Step 5, by the PBT master batch injection mo(u)lding in step 4, back pressure during injection mo(u)lding is the 10%- of injection pressure 15%, mold temperature is 70-80 DEG C, and molding cycle is 15-60S；

Step 6：Performance detection is carried out to PBT material.

Further, described fire retardant is antimony oxide or alkyl phosphinate.

Further, described coupling agent is Silane coupling agent KH550 or aminopropyl triethoxysilane.

Further, described toughener includes：POE-GMA, SiC whisker, potassium titanate crystal whisker.

Further, described antioxidant is that antioxidant AT10 or double (2.4- di-tert-butyl-phenyl) tetramethylolmethane two is sub- Phosphate ester.

Further, described anti ultraviolet agent is titanium dioxide or zinc oxide.

Further, the outer surface of described PBT sleeve pipe is optical cable outer surface, and optical cable outer surface is provided with one at interval of 4mm Striped, described striation thickness is 0.025mm-0.03mm.

Further, a kind of indoor and outdoor preparation method of dry type beam tube direct application type leading in cable, comprises the following steps：

S100 optical fiber is put in storage：The optical fiber of warehouse-in is screened, tests geometrical property and the optical characteristics of optical fiber, optional The qualified optical fiber of energy；

S102 optical fiber coloring：Optical fiber is coated different colors, from whole chromatogram it is desirable to coloring after optical fibre high temp do not take off Color is it is ensured that readily identified when the later stage continues；

S103 sheath (plastic sleeve)；Optical fiber after coloring, water blocking yarn, waterproofing type aramid fiber are positioned in high-moduluss sleeve pipe, and By controlling folding and unfolding linear velocity and tank temperature, sleeve pipe inner fiber is made to have stable excess length control and transmission characteristic；

S104 detects outbound：The every batch of finished cable is arranged to do full performance test it is ensured that qualified post package outbound.

The invention has the beneficial effects as follows:

(1) metal reinforcement of abandoning tradition butterfly optical cable of the present invention, using all dielectric material so that its global sections not Containing any metal ingredient, to thunder and lightning, there is natural screening, there is high safety in utilization.

(2) water blocking yarn and water resistance aramid fiber, one side water blocking yarn and waterproofing type aramid fiber is adopted to ensure in the beam tube of center of the present invention The permeability performance of optical cable, another aspect high-moduluss water resistance aramid fiber improves the tensile strength of optical cable.

(3) plastic sleeve operation of the present invention adopts a kind of flame-retardant PBT material, and this material has that high-moduluss, shore hardness be big, low receipts Contracting, uvioresistant, fire-retardant feature, on the one hand improve the mechanical performance of product, on the other hand improve the uvioresistant of product Line ability and fire resistance are so as to the basic demand that outdoor laid and interior are laid can be met.

(4) sheath Technology of the present invention carries out total system control using dry type production equipment, can accurately ensure to cover Every physical dimension of pipe, is dried voltage supply system, accurately yarn and optical fiber paying off system, stability and high efficiency using dry type nitrogen Extrusion line.Rely on automatization's platform of inlet line in terms of technological parameter input, global procedures input is carried out to technological parameter System, can be to air pressure, yarn, optical fiber, extrusion internal-and external diameter, linear velocity in production process it is ensured that the precision of technological parameter Precise control it is ensured that obtaining maximally effective excess fiber length and geometric parameter, by above measure guarantee dry type sleeve pipe stable, Carry out strict production under reliable working condition to control.

(5) when sheath operation of the present invention produces, specially devise a kind of novel die and device so that cable surface at interval of 4mm forms a striped, and its striation thickness is 0.025mm-0.03mm, makes optical cable have good bending property.

Described above is only the general introduction of technical solution of the present invention, in order to better understand the technological means of the present invention, And can be practiced according to the content of description, below with presently preferred embodiments of the present invention and coordinate accompanying drawing describe in detail as after. The specific embodiment of the present invention is shown in detail in by following examples and its accompanying drawing.

Brief description

In order to be illustrated more clearly that the technical scheme in embodiment of the present invention technology, below will be in the description of embodiment technology The accompanying drawing of required use be briefly described it should be apparent that, drawings in the following description be only the present invention some are real Apply example, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to these accompanying drawings Obtain other accompanying drawings.

Fig. 1 is the structural representation in optical cable section；

Fig. 2 is the perspective view of optical cable；

Fig. 3 is the inventive method process chart；

Fig. 4 is the mould structure schematic diagram of the present invention；

Wherein, 10- optical fiber, 20-PBT sleeve pipe, 30- water blocking yarn, 40- waterproofing type aramid fiber, 201- striped, 50- guide wheel, 501- Groove.

Specific embodiment

Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete Site preparation description is it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.It is based on Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of not making creative work Embodiment, broadly falls into the scope of protection of the invention.

Embodiment 1

With reference to shown in Fig. 1-2, disclose indoor and outdoor dry type beam tube direct application type leading in cable in the present embodiment, it includes Optical fiber 10 and the PBT sleeve pipe 20 being set in outside above-mentioned optical fiber 10, are provided with water blocking yarn 30 and waterproofing type aramid fiber in above-mentioned PBT sleeve pipe 40,

The metal reinforcement of the optical cable abandoning tradition butterfly optical cable in the present embodiment, using all dielectric material so that it is whole Body section does not contain any metal ingredient, has natural screening to thunder and lightning, has high safety in utilization.

Water blocking yarn and water resistance aramid fiber, one side water blocking yarn 30 and waterproofing type aramid fiber 40 is adopted to ensure that in the beam tube of above-mentioned center The permeability performance of optical cable, another aspect high-moduluss water resistance aramid fiber improves the tensile strength of optical cable.

In the present embodiment, plastic sleeve operation adopts a kind of flame-retardant PBT material, and it is big, low that this material has high-moduluss, shore hardness Contraction, uvioresistant, fire-retardant feature, on the one hand improve the mechanical performance of product, on the other hand improve the anti-purple of product Outside line ability and fire resistance are so as to the basic demand that outdoor laid and interior are laid can be met.

PBT material formula in embodiment 1 is as shown in table 1.

The PBT material formula table of table 1 embodiment 1

Component	Content (weight portion)
		PBT	70
Glass fibre	10
		Antimony oxide (fire retardant)	13
POE-GMA (toughener)	0.1
		Silane coupling agent KH550 (coupling agent)	2
Modified ethylene bis-fatty acid amides (lubricant)	1
		Antioxidant AT10	0.1
Titanium dioxide (ultraviolet (UV) resistant agent)	0.5
		Light stabilizer UV-9	0.1
Nucleant agent N AP-53F	0.05

Embodiment 2

Formula in embodiment 2 is as shown in table 2.

The formula table of PBT in table 2 embodiment 2

Embodiment 3

Formula in embodiment 3 is as shown in table 3.

The formula table of PBT in table 3 embodiment 3

Comparative example 1

With embodiment 3 for contrast in comparative example 1, other uniform component cause, and the toughener in comparative example 1 selects POE-GMA, As shown in table 4.

Formula table in table 4 comparative example 1

Comparative example 2

With embodiment 2 for contrast in comparative example 2, it is not added with glass fibre in comparative example 2, formula is as shown in table 5.

Formula table in table 5 comparative example 2

Wherein, in above-described embodiment 1-3 and comparative example 1, the preparation of above-mentioned PBT shell material comprises the following steps：

Step one, get the raw materials ready according to each component in formula, be dried；

Step 2, PBT, the half of amount of flame-retardant agent, toughener, coupling agent, lubricant, antioxidant, ultraviolet (UV) resistant agent, Light stabilizer UV-9, nucleant agent N AP-53F put in high-speed mixer, mix homogeneously；

Step 3, the material of mix homogeneously in step 2 is put into extruding pelletization in double screw extruder, screw speed is 25-60r/min, temperature is 240-260 DEG C, and injection pressure is 50-100PMa, obtains master batch；

Second half of master batch in step 4, step 3 and amount of flame-retardant agent is mixed homogeneously, and then puts into glass fibre The extruding pelletization to double screw extruder, screw speed is 25-60r/min, and temperature is 240-260 DEG C, and injection pressure is 50- 100PMa, obtains PBT master batch；

Step 5, by the PBT master batch injection mo(u)lding in step 4, back pressure during injection mo(u)lding is the 10%- of injection pressure 15%, mold temperature is 70-80 DEG C, and molding cycle is 15-60S；

Step 6：Performance detection is carried out to PBT material.

Material preparation method in above-mentioned comparative example 2：

Step one, get the raw materials ready according to each component in formula, be dried；

Step 2, PBT, the half of amount of flame-retardant agent, toughener, coupling agent, lubricant, antioxidant, ultraviolet (UV) resistant agent, Light stabilizer UV-9, nucleant agent N AP-53F put in high-speed mixer, mix homogeneously；

Step 3, the material of mix homogeneously in step 2 is put into extruding pelletization in double screw extruder, screw speed is 25-60r/min, temperature is 240-260 DEG C, and injection pressure is 50-100PMa, obtains master batch；

Second half of master batch in step 4, step 3 and amount of flame-retardant agent is mixed homogeneously, and puts into double screw extruder Middle extruding pelletization, screw speed is 25-60r/min, and temperature is 240-260 DEG C, and injection pressure is 50-100PMa, obtains PBT Master batch；

Step 5, by the PBT master batch injection mo(u)lding in step 4, back pressure during injection mo(u)lding is the 10%- of injection pressure 15%, mold temperature is 70-80 DEG C, and molding cycle is 15-60S；

Step 6：Performance detection is carried out to PBT material.

Performance test

Performance test is carried out to the PBT material in above-described embodiment 1-3, comparative example 1-2, institute in its test result such as table 6 Show.

Table 6 test result table

Be can be seen that the good mechanical performance of the PBT material in embodiment 1-3 by the result in above-mentioned table 6, have excellent Impact flexibility, notch sensitivity improved, and heat distortion temperature greatly improves, and tensile strength improves, and fire-retardant increasing flesh is good, will not Produce secondary pollution, illustrate in material prescription, glass fibre is larger to the Effect on Mechanical Properties of material, and SiC whisker, titanium Sour potassium whisker is wilful preferably to the increasing of material.

This material has the characteristics that high-moduluss, shore hardness be big, lower shrinkage, uvioresistant, fire-retardant, on the one hand improves product The mechanical performance of product, on the other hand improve the anti-uv-ray of product and fire resistance so as to can meet outdoor laid and The basic demand that interior is laid.

As shown in figure 3, indoor and outdoor with the preparation method of dry type beam tube direct application type leading in cable it is characterised in that include Following steps：

S100 optical fiber is put in storage：The optical fiber of warehouse-in is screened, tests geometrical property and the optical characteristics of optical fiber, select The qualified optical fiber of performance；

S102 optical fiber coloring：Optical fiber is coated different colors, from whole chromatogram it is desirable to coloring after optical fibre high temp do not take off Color is it is ensured that readily identified when the later stage continues；

S103 sheath (plastic sleeve)；Optical fiber after coloring, water blocking yarn, waterproofing type aramid fiber are positioned in high-moduluss sleeve pipe, and By controlling folding and unfolding linear velocity and tank temperature, sleeve pipe inner fiber is made to have stable excess length control and transmission characteristic；

S104 detects outbound：The every batch of finished cable is arranged to do full performance test it is ensured that qualified post package outbound.

Sheath Technology carries out total system control using dry type production equipment, can accurately ensure that the items of sleeve pipe are several What size, is dried the extrusion line of voltage supply system, accurately yarn and optical fiber paying off system, stability and high efficiency using dry type nitrogen. In terms of technological parameter input rely on inlet line automatization's platform, global procedures input system is carried out to technological parameter it is ensured that The precision of technological parameter, in production process can to air pressure, yarn, optical fiber, extrusion internal-and external diameter, linear velocity precise control, Guarantee to obtain maximally effective excess fiber length and geometric parameter, guarantee that dry type sleeve pipe is being stablized, reliably given birth to by above measure Carry out strict production under the conditions of product to control.

When sheath operation produces, specially devise a kind of novel die and device so that cable surface forms one at interval of 4mm Individual striped 201, its striation thickness is 0.025mm-0.03mm, makes optical cable have good bending property.

Concrete Design of Dies and production are described as follows：

1. its key control point is the striped on surface, and the striped of the jacket surface that the quality of mould directly presents, For on the Design of Dies of such special shape optical cable it is necessary to carry out strict EXPERIMENTAL DESIGN it is ensured that cable jacket shape can reach To expected ideal effect.

The present invention designs a kind of guide wheel 50 of zigzag fashion, and two guide pulley surface open a circle circular groove 501, its groove 501 depth size be PBT sleeve outer half, groove 501 spaced surface 4mm about have a 0.025mm-0.03mm The projection of left and right height, thus forming a pair of guide wheel, Fig. 4 is shown in by concrete mould.

2. need in production process to control guide wheel placement location, guide wheel is placed at extrusion head 2cm right position, sleeve pipe Extrude from extruding machine, through guide wheel with groove when in half molten state, crystallisation by cooling after surface forms ring-shaped stripe, Optical cable pictorial diagram is referring to Fig. 2.

Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses the present invention. Multiple modifications to these embodiments will be apparent from for those skilled in the art, as defined herein General Principle can be realized without departing from the spirit or scope of the present invention in other embodiments.Therefore, the present invention It is not intended to be limited to the embodiments shown herein, and be to fit to and principles disclosed herein and features of novelty phase one The scope the widest causing.

Claims (8)

1. indoor and outdoor dry type beam tube direct application type leading in cable, it includes optical fiber and the PBT set being set in described outer fiber Pipe, is provided with water blocking yarn and waterproofing type aramid fiber it is characterised in that in parts by weight, described PBT sleeve pipe in described PBT sleeve pipe The formula of material includes：

Wherein, the preparation of described PBT shell material comprises the following steps：

Step one, get the raw materials ready according to each component in formula, be dried；

Step 2, PBT, the half of amount of flame-retardant agent, toughener, coupling agent, lubricant, antioxidant, ultraviolet (UV) resistant agent, light are steady Determine agent UV-9, nucleant agent N AP-53F and put in high-speed mixer, mix homogeneously；

Step 3, by step 2 mix homogeneously material put into double screw extruder in extruding pelletization, screw speed be 25- 60r/min, temperature is 240-260 DEG C, and injection pressure is 50-100PMa, obtains master batch；

Second half of master batch in step 4, step 3 and amount of flame-retardant agent is mixed homogeneously, and then puts into glass fibre to double Extruding pelletization in screw extruder, screw speed is 25-60r/min, and temperature is 240-260 DEG C, and injection pressure is 50- 100PMa, obtains PBT master batch；

Step 5, by the PBT master batch injection mo(u)lding in step 4, back pressure during injection mo(u)lding is the 10%-15% of injection pressure, Mold temperature is 70-80 DEG C, and molding cycle is 15-60S；

Step 6：Performance detection is carried out to PBT material.

2. indoor and outdoor according to claim 1 with dry type beam tube direct application type leading in cable it is characterised in that described fire-retardant Agent is antimony oxide or alkyl phosphinate.

3. indoor and outdoor according to claim 1 with dry type beam tube direct application type leading in cable it is characterised in that described coupling Agent is Silane coupling agent KH550 or aminopropyl triethoxysilane.

4. indoor and outdoor according to claim 1 with dry type beam tube direct application type leading in cable it is characterised in that described toughness reinforcing Agent includes：POE-GMA, SiC whisker, potassium titanate crystal whisker.

5. indoor and outdoor according to claim 1 with dry type beam tube direct application type leading in cable it is characterised in that described antioxygen Agent is antioxidant AT10 or double (2.4- di-tert-butyl-phenyl) pentaerythritol diphosphites.

6. indoor and outdoor according to claim 1 with dry type beam tube direct application type leading in cable it is characterised in that described anti-purple Outer dose is titanium dioxide or zinc oxide.

7. indoor and outdoor according to claim 1 with dry type beam tube direct application type leading in cable it is characterised in that described PBT The outer surface of sleeve pipe is optical cable outer surface, and optical cable outer surface is provided with a striped at interval of 4mm, and described striation thickness is 0.025mm-0.03mm.

8. the preparation side of dry type beam tube direct application type leading in cable of the indoor and outdoor described in a kind of claim 1-7 any one Method is it is characterised in that comprise the following steps：

S100 optical fiber is put in storage：The optical fiber of warehouse-in is screened, tests geometrical property and the optical characteristics of optical fiber, closed from performance The optical fiber of lattice；

S102 optical fiber coloring：Optical fiber is coated different colors, from whole chromatogram it is desirable to optical fibre high temp is colour-fast after coloring, protects The card later stage is readily identified when continuing；

S103 sheath (plastic sleeve)；Optical fiber after coloring, water blocking yarn, waterproofing type aramid fiber are positioned in high-moduluss sleeve pipe, and pass through Control folding and unfolding linear velocity and tank temperature, make sleeve pipe inner fiber have stable excess length control and transmission characteristic；

S104 detects outbound：The every batch of finished cable is arranged to do full performance test it is ensured that qualified post package outbound.