CN117761852A - Thermoplastic-resin composite sleeve optical unit, preparation method and device thereof and optical cable - Google Patents
Thermoplastic-resin composite sleeve optical unit, preparation method and device thereof and optical cable Download PDFInfo
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- CN117761852A CN117761852A CN202311756737.1A CN202311756737A CN117761852A CN 117761852 A CN117761852 A CN 117761852A CN 202311756737 A CN202311756737 A CN 202311756737A CN 117761852 A CN117761852 A CN 117761852A
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- 229920005992 thermoplastic resin Polymers 0.000 title claims abstract description 63
- 239000000805 composite resin Substances 0.000 title claims abstract description 62
- 230000003287 optical effect Effects 0.000 title claims abstract description 25
- 238000002360 preparation method Methods 0.000 title abstract description 23
- 229920005989 resin Polymers 0.000 claims abstract description 88
- 239000011347 resin Substances 0.000 claims abstract description 88
- 229920001169 thermoplastic Polymers 0.000 claims abstract description 82
- 239000004416 thermosoftening plastic Substances 0.000 claims abstract description 61
- 239000000463 material Substances 0.000 claims abstract description 42
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- 238000002834 transmittance Methods 0.000 claims abstract description 9
- 239000002861 polymer material Substances 0.000 claims abstract description 7
- 239000010410 layer Substances 0.000 claims description 101
- 238000005507 spraying Methods 0.000 claims description 47
- 238000001125 extrusion Methods 0.000 claims description 33
- 239000007921 spray Substances 0.000 claims description 24
- 239000002243 precursor Substances 0.000 claims description 19
- 150000001875 compounds Chemical class 0.000 claims description 13
- 238000004519 manufacturing process Methods 0.000 claims description 13
- 238000001816 cooling Methods 0.000 claims description 11
- 239000002131 composite material Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 9
- 239000000758 substrate Substances 0.000 claims description 7
- 230000001678 irradiating effect Effects 0.000 claims description 5
- 238000012545 processing Methods 0.000 claims description 5
- 229920001871 amorphous plastic Polymers 0.000 claims description 4
- 239000002356 single layer Substances 0.000 claims description 4
- 229920000178 Acrylic resin Polymers 0.000 claims description 3
- 239000004925 Acrylic resin Substances 0.000 claims description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 3
- 239000000654 additive Substances 0.000 claims description 3
- 230000000996 additive effect Effects 0.000 claims description 3
- 239000012752 auxiliary agent Substances 0.000 claims description 3
- 239000003999 initiator Substances 0.000 claims description 3
- 239000000178 monomer Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 238000000016 photochemical curing Methods 0.000 abstract description 13
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- 239000012815 thermoplastic material Substances 0.000 abstract description 2
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- HRANPRDGABOKNQ-ORGXEYTDSA-N (1r,3r,3as,3br,7ar,8as,8bs,8cs,10as)-1-acetyl-5-chloro-3-hydroxy-8b,10a-dimethyl-7-oxo-1,2,3,3a,3b,7,7a,8,8a,8b,8c,9,10,10a-tetradecahydrocyclopenta[a]cyclopropa[g]phenanthren-1-yl acetate Chemical compound C1=C(Cl)C2=CC(=O)[C@@H]3C[C@@H]3[C@]2(C)[C@@H]2[C@@H]1[C@@H]1[C@H](O)C[C@@](C(C)=O)(OC(=O)C)[C@@]1(C)CC2 HRANPRDGABOKNQ-ORGXEYTDSA-N 0.000 description 1
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Abstract
The invention discloses a thermoplastic-resin composite sleeve optical unit, a preparation method and a device thereof and an optical cable. The thermoplastic-resin composite sleeve light unit includes a light guiding member and a sleeve housing the light guiding member; the sleeve has adjoining thermoplastic and resin layers; the resin layer is positioned inside the thermoplastic layer; the resin layer is light-cured resin; the thermoplastic layer is made of thermoplastic polymer material, and the light transmittance of the thermoplastic layer is more than 60% for the photoinitiation wave band of the light-cured resin. The thermoplastic-resin composite sleeve light unit provided by the invention combines thermoplastic materials and photo-curing resin materials so as to change sleeve performances, including mechanical performances, surface performances and chemical performances; mechanical properties such as compression resistance, tensile resistance, bending properties, and elasticity; surface properties such as coefficient of friction, softening point; chemical properties such as stability and water absorption, so that the light unit can better adapt to different application scenes and design requirements.
Description
Technical Field
The invention belongs to the field of optical communication, and in particular relates to a thermoplastic-resin composite sleeve optical unit, a preparation method and device thereof and an optical cable.
Background
The optical fiber sleeve is a plastic pipe filled with a plurality of optical fibers and water-blocking materials, and is generally made of thermoplastic polymer materials. Commonly used fiber optic ferrule materials such as Polycarbonate (PC) and polybutylene terephthalate (PBT) materials. These commonly used sleeve materials have respective advantages and disadvantages, and are used in different scenes, for example, PBT has the defects of poor heat resistance, low impact performance, large molding shrinkage and the like, and PC has the problem of poor chemical resistance, but has high heat resistance and high impact performance.
Sometimes, to accommodate different requirements, different casing materials are combined together to form a composite casing. Chinese patent document CN114942499a, provides a light unit with a PC/PBT composite sleeve; chinese patent CN115508963a provides an easy-to-open peeling unit with a composite sleeve.
However, at present, the composite sleeve is formed by adopting a multi-material coextrusion process, and the sleeve material is limited to a thermoplastic polymer material. Other types of composite cannula light unit technologies are currently unavailable.
The photo-curing resin is a common material in the optical fiber cable, has excellent mechanical property, mature formula and stable preparation process, can provide different elastic modulus and shrinkage rate according to the requirements of mechanical property and processing property, and can load color masterbatch or other functional materials. There is no current process for forming fiber optic ferrules.
Disclosure of Invention
Aiming at the defects or improvement demands of the prior art, the invention provides a thermoplastic-resin composite sleeve optical unit, a preparation method, a device and an optical cable thereof, and aims to uniformly spray light-cured resin on the inner wall of a thermoplastic polymer sleeve forming material with good light transmittance of a photoinitiation band by adopting an internal spraying method, and simultaneously form the outer wall of a thermoplastic polymer material and the inner wall of the light-cured resin through light-curing and cooling processes to prepare the composite sleeve with the light-cured resin, thereby optimizing the performance of the optical unit, being applicable to more application scenes and meeting different design demands.
To achieve the above object, according to one aspect of the present invention, there is provided a thermoplastic-resin composite sleeve light unit including a light guiding member and a sleeve housing the light guiding member;
the sleeve has adjoining thermoplastic and resin layers;
the resin layer is positioned inside the thermoplastic layer;
the resin layer is light-cured resin;
the thermoplastic layer is made of thermoplastic polymer material, and the light transmittance of the thermoplastic layer is more than 60% for the photoinitiation wave band of the light-cured resin.
Preferably, the thermoplastic-resin composite sleeve light unit has a thickness of the resin layer of 0.01 to 0.3mm.
Preferably, in the thermoplastic-resin composite sleeve light unit, the shrinkage rate of the thermoplastic layer is between 0.4% and 2.0%, and the ultraviolet light band UVA light transmittance is above 60%.
Preferably, the thermoplastic-resin composite sleeve light unit has the resin layer entirely or partially covered on the inside of the thermoplastic layer; the resin layer
Continuous or discontinuous in the axial direction of the light unit
And/or
Continuous or discontinuous in the circumferential direction of the light unit.
Preferably, the thermoplastic layer of the thermoplastic-resin composite sleeve light unit is of a single-layer structure or a multi-layer structure, the material is amorphous plastic, and is preferably selected from one or more of PET, PC, PP and PA materials, or the combination of the materials, the outer diameter is 2.0-15 mm, and the wall thickness is 0.15-1.0 mm; the photocurable resin is an acrylic resin, preferably comprising: 20-70 wt% of acrylic monomer, 20-70 wt% of prepolymer, 1-10 wt% of initiator and 1-10 wt% of other additive auxiliary agents.
According to another aspect of the present invention, there is provided a method for manufacturing the thermoplastic-resin composite sleeve light unit, comprising the steps of:
(1) Extruding thermoplastic polymer sleeve forming material outside the bundled light guide elements to form a sleeve thermoplastic layer base material;
(2) Cooling the sleeve thermoplastic layer substrate in the step (1) in air, and then entering a hot water tank for pre-cooling, wherein the thermoplastic polymer sleeve forming material is cooled and shaped into a thermoplastic layer, so as to obtain a semi-solidified sleeve;
(3) Spraying a light-cured resin precursor solution on the inner wall of the semi-cured sleeve, and irradiating the semi-cured sleeve obtained in the step (2) by using an ultraviolet lamp, so that the light-cured resin precursor solution on the inner side of the semi-cured sleeve is cured into a resin layer, thereby forming the thermoplastic-resin composite sleeve light unit.
Preferably, the preparation method of the thermoplastic-resin composite sleeve light unit comprises the step of preparing the photo-curing resin precursor solution with the viscosity of 2000-10000 Pa.s.
Preferably, in the preparation method of the thermoplastic-resin composite sleeve light unit, the extrusion processing temperature of the thermoplastic polymer sleeve forming material is 180-280 ℃, and the temperature of the hot water tank is 40-80 ℃.
According to another aspect of the present invention, there is provided a manufacturing apparatus of the thermoplastic-resin composite sleeve light unit, comprising an annular extrusion die, and a tubular cluster spray composite die; the extrusion die is nested and arranged with a tubular cluster spraying compound die as a central nesting common center shaft;
the extrusion die is provided with a die core and a die cover, and an annular extrusion port is formed;
the cluster spraying compound die is provided with a spraying cavity positioned at the outer side and a cluster pipeline positioned at the center; the tail end of the spraying cavity is provided with an inclined outer side inclination angle, and the inclination angle is the intersection angle of the tail end of the spraying cavity and the center shaft;
the extrusion port, the spray cavity end and the bundling pipeline end are sequentially arranged along the paying-off direction of the photoconductive element.
Preferably, the inclination angle of the spraying cavity of the preparation device of the thermoplastic-resin composite sleeve light unit is 5-30 degrees, the distance between the extrusion opening and the tail end of the spraying cavity is 20-100 mm, and the distance between the spraying cavity and the tail end of the bundling pipeline is 5-20 mm.
Preferably, the preparation device of the thermoplastic-resin composite sleeve light unit, the spraying cavity of which has an annular section, or
The spray chamber has a plurality of individual tubular chambers, the spray chamber end cross section preferably being in the shape of a sector of a circle.
Preferably, the preparation device of the thermoplastic-resin composite sleeve light unit further comprises a hot water tank, wherein the hot water tank is arranged at the position of 20-100 mm away from the downstream of the extrusion opening.
According to another aspect of the present invention, there is provided an optical cable comprising a cable core including the thermoplastic-resin composite sleeve optical unit provided by the present invention, and an outer sheath accommodating the cable core.
In general, the above technical solutions conceived by the present invention, compared with the prior art, enable the following beneficial effects to be obtained:
the thermoplastic-resin composite sleeve light unit provided by the invention combines thermoplastic materials and photo-curing resin materials so as to change sleeve performances, including mechanical performances, surface performances and chemical performances; mechanical properties such as compression resistance, tensile resistance, bending properties, and elasticity; surface properties such as coefficient of friction, softening point; chemical properties such as stability and water absorption, so that the light unit can better adapt to different application scenes and design requirements.
The production method and the device for the thermoplastic-resin composite sleeve optical unit can simultaneously form the thermoplastic layer and the resin layer, have high production efficiency, and have lower energy consumption due to the adoption of partial photo-curing materials compared with the coextrusion process adopted by the traditional composite structure sleeve.
Drawings
FIG. 1 is a schematic cross-sectional view of a device for producing a thermoplastic-resin composite sleeve light unit according to example 1 of the present invention;
FIG. 2 is an enlarged view of a part of the end of the spray cavity of the apparatus for producing a thermoplastic-resin composite sleeve light unit according to example 1 of the present invention;
FIG. 3 is a schematic view of the end face structure of a cluster spraying compound die of a device for preparing a thermoplastic-resin composite sleeve light unit provided in embodiment 1 of the present invention;
FIG. 4 is a schematic cross-sectional view of a thermoplastic-resin composite sleeve light unit used in examples 2 and 4 of the present invention
FIG. 5 is a schematic cross-sectional view of a thermoplastic-resin composite sleeve light unit employed in example 3 of the present invention;
FIG. 6 is a schematic view showing the end face structure of a cluster spraying compound die of a device for manufacturing a thermoplastic-resin composite sleeve optical unit sleeve according to example 5 of the present invention;
FIG. 7 is a schematic view showing the structure of a thermoplastic-resin composite ferrule light unit ferrule according to embodiment 6 of the present invention;
FIG. 8 is a schematic view showing the structure of a thermoplastic-resin composite ferrule light unit ferrule according to embodiment 7 of the present invention;
fig. 9 is a schematic view showing the structure of a thermoplastic-resin composite ferrule light unit ferrule according to embodiment 8 of the present invention.
The same reference numbers are used throughout the drawings to reference like elements or structures, wherein: 1 is an extrusion die, 1.1 is a die core, 1.2 is a die cover, 2 is a cluster spraying compound die, 2.1 is a spraying cavity, 2.2 is a cluster pipeline, 3 is a hot water tank, 4 is a thermoplastic-resin compound sleeve light unit, 4.1 is a thermoplastic layer, 4.2 is a resin layer, 4.3 is a light guide element, and 4.4 is a water blocking element.
Detailed Description
The present invention will be described in further detail with reference to the following examples in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
The invention provides a thermoplastic-resin composite sleeve light unit, which comprises a light guiding element and a sleeve for accommodating the light guiding element;
the sleeve has adjoining thermoplastic and resin layers; the resin layer is positioned inside the thermoplastic layer;
the thermoplastic layer is made of thermoplastic polymer material, and the light transmittance of the thermoplastic layer is more than 60% for the photoinitiation wave band of the light-cured resin. Typically, the UVA light transmittance in the uv band is above 60% to facilitate uv light transmission to initiate curing of the resin layer; the shrinkage rate of the thermoplastic layer is between 0.4% and 2.0%. In the preparation process, the thermoplastic layer is firstly manufactured, and the photo-curing resin is coated in the shrinkage process, and then the resin layer is formed, so that when the curing shrinkage rate of the thermoplastic layer is lower than 2.0%, the wrinkling or cracking caused by the shrinkage influence of the thermoplastic layer in the curing process of the resin layer can be avoided. The thermoplastic layer can be of a single-layer structure or a multi-layer structure, the material is amorphous plastic, the amorphous plastic has good light transmittance for photoinitiation wave bands, and is preferably selected from one or more of PET, PC, PP and PA materials, and various materials can be mixed to form the thermoplastic layer of the single-layer structure, and meanwhile, the thermoplastic layer of the multi-layer structure can be formed by compounding, wherein the outer diameter of the thermoplastic layer is 2.0-15 mm, and the wall thickness is 0.15-1.0 mm;
the resin layer is a photo-curing resin. The thickness of the resin layer is 0.01-0.3 mm, the precursor of the photo-curing resin has good flow, thinner resin can be formed, and the surface property of the inner wall of the sleeve can be adjusted or specific functions, such as identification, can be realized on the premise of not obviously increasing the outer diameter of the sleeve. The photocurable resin is an acrylic resin, preferably comprising: 20-70 wt% of acrylic monomer, 20-70 wt% of prepolymer, 1-10 wt% of initiator and 1-10 wt% of other additive auxiliary agents. The resin layer is covered on the whole or part of the inner side of the thermoplastic layer; the resin layer is continuous or discontinuous in the light unit axial direction and/or continuous or discontinuous in the light unit circumferential direction.
The preparation method of the thermoplastic-resin composite sleeve light unit provided by the invention comprises the following steps:
(1) Extruding thermoplastic polymer sleeve forming material outside the bundled light guide elements to form a sleeve thermoplastic layer base material;
(2) Cooling the sleeve thermoplastic layer substrate in the step (1) in air, and then entering a hot water tank for pre-cooling, wherein the thermoplastic polymer sleeve forming material is cooled and shaped into a thermoplastic layer, so as to obtain a semi-solidified sleeve;
the extrusion working temperature of the thermoplastic polymer bushing is generally above 100 ℃, and the extrusion working temperature is generally 180-280 ℃, and the composition of the photo-curable resin precursor solution is unstable at the temperature, which may cause the curing performance or the performance of the resin layer after curing to be not expected. However, the temperature of the thermoplastic layer substrate is too fast, so that on one hand, the shrinkage rate is large, the inner side of the thermoplastic layer substrate is coated with the photo-curing resin and then is wrinkled or cracked, and on the other hand, the interface between the thermoplastic layer and the resin layer is possibly not tightly combined, and delamination and detachment are easy. Therefore, the hot water tank is pre-cooled, and the temperature of the hot water tank is maintained at 40-80 ℃.
(3) Spraying a light-cured resin precursor solution on the inner wall of the semi-cured sleeve, and irradiating the semi-cured sleeve obtained in the step (2) by using an ultraviolet lamp, so that the light-cured resin precursor solution on the inner side of the semi-cured sleeve is cured into a resin layer, thereby forming the thermoplastic-resin composite sleeve light unit. The viscosity of the photo-curing resin precursor solution is 2000-10000 Pa.s, so that the photo-curing resin precursor solution is prevented from dripping on the photoconductive element or being unevenly coated.
The invention provides a preparation device of a thermoplastic-resin composite sleeve light unit, which is shown in figure 1, and comprises an annular extrusion die and a tubular cluster spraying compound die; the extrusion die is nested and arranged with a tubular cluster spraying compound die as a central nesting common center shaft;
the extrusion die is provided with a die core and a die cover, and an annular extrusion port is formed;
the cluster spraying compound die is provided with a spraying cavity positioned at the outer side and a cluster pipeline positioned at the center; the tail end of the spraying cavity is provided with an inclined outer side inclination angle which is the intersection angle of the tail end of the spraying cavity and the center shaft, and the inclination angle of the spraying cavity is 5-30 degrees so as to ensure that the photo-curing resin precursor solution is uniformly sprayed on the inner side of the semi-curing sleeve; the spray chamber has an annular cross-section or the spray chamber has a plurality of separate tubular chambers, the chamber end cross-section preferably being in the shape of a sector of a circle. When a discontinuous resin layer in the circumferential direction of the light unit is required, the ends of the plurality of independent cavities are distributed in the resin layer covering part, and more preferably, the plurality of independent cavities are adopted, the ends of the independent cavities are uniformly distributed in the circumferential direction, and the ends of the independent cavities are positioned in the cavity of the resin layer covering part for spraying. When a discontinuous resin layer is needed in the axial direction of the light unit, the spraying cavity is enabled to work according to the time slot, so that pulse intermittent spraying is formed.
The extrusion port, the spray cavity end and the bundling pipeline end are sequentially arranged along the paying-off direction of the photoconductive element. The distance between the extrusion opening and the tail end of the spraying cavity is 20-100 mm, and the distance between the spraying cavity and the tail end of the bundling pipeline is 5-20 mm.
Preferably, the preparation device of the thermoplastic-resin composite sleeve light unit further comprises a hot water tank, wherein the hot water tank is arranged at a position 20-100 mm away from the extrusion opening.
The following are examples:
example 1
Example 1 is a preparation apparatus of a thermoplastic-resin composite sleeve light unit, as shown in fig. 1, comprising an annular extrusion die 1 and a tubular cluster spray composite die 2; the extrusion die 1 is nested and arranged by taking a tubular cluster spraying compound die 2 as a central shared shaft;
the extrusion die 1 is provided with a die core 1.1 and a die cover 1.2 to form an annular extrusion opening;
the cluster spraying compound die 2 is provided with a spraying cavity 2.1 positioned at the outer side and a cluster pipeline 2.2 positioned at the center; the spraying cavity 2.1 is provided with an inclined angle at the outer side, wherein the inclined angle is the intersection angle of the tail end of the spraying cavity and the center shaft, namely the inclined angle A of the spraying cavity is 15 degrees, and a partial enlarged view is shown in figure 2; the spray chamber 2.1 has an annular cross section as shown in fig. 3.
The extrusion port, the spray cavity end and the bundling pipeline end are sequentially arranged along the paying-off direction of the photoconductive element. The distance L1 between the extrusion port and the tail end of the spraying cavity is 50mm, and the distance L2 between the spraying cavity and the tail end of the bundling pipeline is 10mm.
The preparation device of the thermoplastic-resin composite sleeve light unit further comprises a hot water tank 3, wherein the distance L3 between the hot water tank and the extrusion opening is 55mm.
Examples 2 to 4
The apparatus for preparing a thermoplastic-resin composite sleeve light unit provided in example 1 was applied to prepare a light unit having a structure as shown in fig. 4 or 5, wherein examples 2 and 4 employ the structure of fig. 4, the light guiding element 4.3 is a colored optical fiber, example 3 employs the structure of fig. 5, the light guiding element 4.3 employs an optical fiber ribbon including an optical fiber 4.3 as a light guiding element, and a water blocking element 4.4, accommodated in a sleeve having adjacent thermoplastic layers 4.1 and resin layers 4.2; the resin layer 4.2 is inside the thermoplastic layer 4.1 and covers the whole surface; the material selection is shown in Table 1.
The parameters used for the manufacturing method of the thermoplastic-resin composite sleeve light units of examples 2 to 4 and comparative example 1 are shown in table 1. The preparation method comprises the following steps:
(1) Extruding thermoplastic polymer sleeve forming material outside the bunched light guide element 4.3 and the water blocking element 4.4 to form a sleeve thermoplastic layer base material;
(2) Cooling the sleeve thermoplastic layer substrate in the step (1) in air, and then entering a hot water tank for pre-cooling, wherein the thermoplastic polymer sleeve forming material is cooled and shaped into a thermoplastic layer 4.1, so as to obtain a semi-solidified sleeve;
(3) Spraying a light-cured resin precursor solution on the inner wall of the semi-cured sleeve, and irradiating the semi-cured sleeve obtained in the step (2) by using an ultraviolet lamp, so that the light-cured resin precursor solution on the inner side of the semi-cured sleeve is cured into a resin layer 4.2, thereby forming the thermoplastic-resin composite sleeve light unit 4. The viscosity of the photo-curing resin precursor solution is 2000-10000 Pa.s.
TABLE 1 thermoplastic-resin composite sleeve light unit preparation parameters
| Example 2 | Example 3 | Example 4 | Comparative example 1 | Comparative example 2 | Comparative example 3 | |
| The outer diameter of the light unit is mm | 2.0 | 15.0 | 2.5 | 2.5 | 2.5 | 2.5 |
| Thermoplastic layer material | PC | PP | PC | PP | PP | PP |
| Shrinkage rate | 0.4％ | 2％ | 0.4％ | 4％ | 1.8％ | 1.8％ |
| Thickness of thermoplastic layer mm | 0.15 | 1.0 | 0.25 | 0.25 | 0.25 | 0.25 |
| Thickness of resin layer mm | 0.05 | 0.3 | 0.1 | 0.1 | 0.1 | 0.1 |
| Thermoplastic layer processing temperature DEG C | 240～270 | 210～230 | 240～270 | 210～230 | 210～230 | 210～230 |
| The temperature of the hot water tank is DEG C | 80 | 40 | 80 | 80 | 80 | 25 |
| Viscosity of resin mPas | 2000 | 10000 | 5000 | 5000 | 1000 | 1000 |
| Sleeve forming condition | Good quality | Good quality | Good quality | Fold | Dripping down | Layering |
Example 5
This example is a device for producing a thermoplastic-resin composite sleeve light unit, the overall structure of which is similar to that of example 1, the difference being that: the spray chamber has 4 independent tubular chambers with a fan-ring shaped cross section at the end of the chamber, as shown in fig. 6. The tail ends of the 4 independent cavities are uniformly distributed in the circumferential direction, and the tail ends of the 4 independent cavities are positioned in the cavity of the covering part of the resin layer for spraying. When a discontinuous resin layer is needed in the axial direction of the light unit, the spraying cavity is enabled to work according to the time slot, so that pulse intermittent spraying is formed.
Examples 6 to 8
Applying the preparation device of the thermoplastic-resin composite sleeve optical unit provided in examples 1, 5, preparing an optical unit, using a resin layer as an internal spray mark, adding 5wt% to 20wt% of pigment, the optical unit structure being shown in fig. 4, comprising a colored optical fiber 4.3, a water blocking element 4.4 and a sleeve 4 in which an optical fiber or an optical fiber ribbon as an optical unit element is accommodated, the sleeve structures in examples 6, 7 and 8 being shown in fig. 7,8 and 9, respectively, the sleeve having an adjoining thermoplastic layer 4.1 and resin layer 4.2; the resin layer 4.2 is inside the thermoplastic layer 4.1 and partially covers it; the material selection is shown in Table 2.
The parameters used for the manufacturing method of the thermoplastic-resin composite sleeve light unit in examples 6 to 8 are shown in Table 2. The preparation method comprises the following steps:
(1) Extruding thermoplastic polymer sleeve forming material outside the bunched light guide element 4.3 and the water blocking element 4.4 to form a sleeve thermoplastic layer base material;
(2) Cooling the sleeve thermoplastic layer substrate in the step (1) in air, and then entering a hot water tank for pre-cooling, wherein the thermoplastic polymer sleeve forming material is cooled and shaped into a thermoplastic layer 4.1, so as to obtain a semi-solidified sleeve;
(3) Spraying a light-cured resin precursor solution on the inner wall of the semi-cured sleeve, and irradiating the semi-cured sleeve obtained in the step (2) by using an ultraviolet lamp, so that the light-cured resin precursor solution on the inner side of the semi-cured sleeve is cured into a resin layer 4.2, thereby forming the thermoplastic-resin composite sleeve light unit 4. The viscosity of the photo-cured resin precursor solution is 2000-6000 mpa.s.
TABLE 2 thermoplastic-resin composite sleeve light unit preparation parameters
| Example 6 | Example 7 | Example 8 | |
| The outer diameter of the light unit is mm | 2.0 | 15.0 | 2.5 |
| Thermoplastic layer material | PC | PP | PC |
| Shrinkage rate | 0.4％ | 2％ | 0.4％ |
| Thickness of thermoplastic layer mm | 0.15 | 1.0 | 0.25 |
| Thickness of resin layer mm | 0.05 | 0.1 | 0.08 |
| Preparation device | Example 1 | Example 5 | Example 5 |
| Resin shape | Annular, axially discontinuous | Strip-like, circumferentially discontinuous | Bulk, axial and circumferential discontinuities |
| Spray gun shape | Annular shape | Sector shape | Sector shape |
| Spray interval time | 0.5ms | Without stopping | 0.1ms |
| Thermoplastic layer processing temperature DEG C | 240～270 | 210～230 | 240～270 |
| The temperature of the hot water tank is DEG C | 80 | 40 | 80 |
| Viscosity of resin mPas | 2000 | 6000 | 4000 |
| Sleeve forming condition | Good quality | Good quality | Good quality |
It will be readily appreciated by those skilled in the art that the foregoing description is merely a preferred embodiment of the invention and is not intended to limit the invention, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (13)
1. A thermoplastic-resin composite ferrule light unit comprising a light guiding element and a ferrule housing said light guiding element;
the sleeve has adjoining thermoplastic and resin layers;
the resin layer is positioned inside the thermoplastic layer;
the resin layer is light-cured resin;
the thermoplastic layer is made of thermoplastic polymer material, and the light transmittance of the thermoplastic layer is more than 60% for the photoinitiation wave band of the light-cured resin.
2. The thermoplastic-resin composite sleeve light unit of claim 1, wherein said resin layer has a thickness of 0.01 to 0.3mm.
3. The thermoplastic-resin composite sleeve light unit of claim 1 wherein said thermoplastic layer has a shrinkage of between 0.4% and 2.0% and a UVA light transmittance in the ultraviolet range of greater than 60%.
4. The thermoplastic-resin composite sleeve light unit of claim 1, wherein the resin layer is fully or partially covered inside the thermoplastic layer; the resin layer
Continuous or discontinuous in the axial direction of the light unit
And/or
Continuous or discontinuous in the circumferential direction of the light unit.
5. The thermoplastic-resin composite sleeve light unit according to claim 1, wherein the thermoplastic layer is of a single-layer structure or a multi-layer structure, the material is amorphous plastic, preferably one or a mixture of a plurality of materials selected from PET, PC, PP and PA, or a combination of a plurality of materials, the outer diameter is 2.0 mm-15 mm, and the wall thickness is 0.15-1.0 mm; the photocurable resin is an acrylic resin, preferably comprising: 20-70 wt% of acrylic monomer, 20-70 wt% of prepolymer, 1-10 wt% of initiator and 1-10 wt% of other additive auxiliary agents.
6. A method of manufacturing a thermoplastic-resin composite sleeve light unit according to any one of claims 1 to 5, comprising the steps of:
(1) Extruding thermoplastic polymer sleeve forming material outside the bundled light guide elements to form a sleeve thermoplastic layer base material;
(2) Cooling the sleeve thermoplastic layer substrate in the step (1) in air, and then entering a hot water tank for pre-cooling, wherein the thermoplastic polymer sleeve forming material is cooled and shaped into a thermoplastic layer, so as to obtain a semi-solidified sleeve;
(3) Spraying a light-cured resin precursor solution on the inner wall of the semi-cured sleeve, and irradiating the semi-cured sleeve obtained in the step (2) by using an ultraviolet lamp, so that the light-cured resin precursor solution on the inner side of the semi-cured sleeve is cured into a resin layer, thereby forming the thermoplastic-resin composite sleeve light unit.
7. The method of producing a thermoplastic-resin composite sleeve light unit according to claim 6, wherein the solution viscosity of the photocurable resin precursor is 2000 to 10000mpa.s.
8. The method for manufacturing a thermoplastic-resin composite sleeve optical unit according to claim 6, wherein the extrusion processing temperature of the thermoplastic polymer sleeve forming material is 180-280 ℃ and the hot water tank temperature is 40-80 ℃.
9. A manufacturing apparatus of a thermoplastic-resin composite sleeve optical unit according to any one of claims 1 to 5, comprising an annular extrusion die, and a tubular cluster spray composite die; the extrusion die is nested and arranged with a tubular cluster spraying compound die as a central nesting common center shaft;
the extrusion die is provided with a die core and a die cover, and an annular extrusion port is formed;
the cluster spraying compound die is provided with a spraying cavity positioned at the outer side and a cluster pipeline positioned at the center; the tail end of the spraying cavity is provided with an inclined outer side inclination angle, and the inclination angle is the intersection angle of the tail end of the spraying cavity and the center shaft;
the extrusion port, the spray cavity end and the bundling pipeline end are sequentially arranged along the paying-off direction of the photoconductive element.
10. The apparatus for manufacturing a thermoplastic-resin composite sleeve optical unit according to claim 9, wherein the spray cavity has an inclination angle of 5 to 30 °, the extrusion port is spaced apart from the end of the spray cavity by 20 to 100mm, and the spray cavity is spaced apart from the end of the cluster pipe by 5 to 20mm.
11. The apparatus for manufacturing a thermoplastic-resin composite sleeve optical unit according to claim 9, wherein the spray cavity has an annular cross section, or
The spray chamber has a plurality of individual tubular chambers, the spray chamber end cross section preferably being in the shape of a sector of a circle.
12. The apparatus for manufacturing a thermoplastic-resin composite sleeve light unit according to claim 9, further comprising a hot water tank disposed at a distance of 20 to 100mm downstream of the extrusion port.
13. An optical cable comprising a cable core and an outer jacket housing the cable core, the cable core comprising the thermoplastic-resin composite ferrule light unit as claimed in any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311756737.1A CN117761852A (en) | 2023-12-20 | 2023-12-20 | Thermoplastic-resin composite sleeve optical unit, preparation method and device thereof and optical cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311756737.1A CN117761852A (en) | 2023-12-20 | 2023-12-20 | Thermoplastic-resin composite sleeve optical unit, preparation method and device thereof and optical cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117761852A true CN117761852A (en) | 2024-03-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311756737.1A Pending CN117761852A (en) | 2023-12-20 | 2023-12-20 | Thermoplastic-resin composite sleeve optical unit, preparation method and device thereof and optical cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117761852A (en) |
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2023
- 2023-12-20 CN CN202311756737.1A patent/CN117761852A/en active Pending
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