CN1162822A - skin/foam/skin physical foaming cable and manufacturing process thereof - Google Patents
skin/foam/skin physical foaming cable and manufacturing process thereof Download PDFInfo
- Publication number
- CN1162822A CN1162822A CN 97100476 CN97100476A CN1162822A CN 1162822 A CN1162822 A CN 1162822A CN 97100476 CN97100476 CN 97100476 CN 97100476 A CN97100476 A CN 97100476A CN 1162822 A CN1162822 A CN 1162822A
- Authority
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- Prior art keywords
- skin
- ldpe
- layer
- density polyethylene
- hdpe
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- Pending
Links
- 238000005187 foaming Methods 0.000 title claims abstract description 10
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 8
- 239000006260 foam Substances 0.000 title claims description 21
- 229920001684 low density polyethylene Polymers 0.000 claims abstract description 33
- 239000004702 low-density polyethylene Substances 0.000 claims abstract description 33
- 229920001903 high density polyethylene Polymers 0.000 claims abstract description 29
- 239000004700 high-density polyethylene Substances 0.000 claims abstract description 29
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000007787 solid Substances 0.000 claims abstract description 14
- 239000004020 conductor Substances 0.000 claims abstract description 7
- 229910052802 copper Inorganic materials 0.000 claims abstract description 6
- 239000010949 copper Substances 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims abstract description 5
- 239000000203 mixture Substances 0.000 claims abstract description 5
- 210000003491 skin Anatomy 0.000 claims description 30
- 238000007664 blowing Methods 0.000 claims description 12
- 210000003038 endothelium Anatomy 0.000 claims description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 6
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 229920003023 plastic Polymers 0.000 claims description 5
- 239000004033 plastic Substances 0.000 claims description 5
- 239000004594 Masterbatch (MB) Substances 0.000 claims description 4
- 210000002615 epidermis Anatomy 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000005491 wire drawing Methods 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 2
- 239000007789 gas Substances 0.000 claims description 2
- 210000003296 saliva Anatomy 0.000 claims description 2
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 2
- 229920002554 vinyl polymer Polymers 0.000 claims description 2
- 230000008901 benefit Effects 0.000 abstract description 3
- 230000004308 accommodation Effects 0.000 abstract 1
- 238000009413 insulation Methods 0.000 description 6
- 230000004888 barrier function Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000004927 fusion Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 101000574013 Homo sapiens Pre-mRNA-processing factor 40 homolog A Proteins 0.000 description 1
- 102100025822 Pre-mRNA-processing factor 40 homolog A Human genes 0.000 description 1
- 206010000269 abscess Diseases 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
Landscapes
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The present invention belongs to a communication cable and a manufacturing method thereof. The surface of a copper conductor is covered with a layer of solid inner skin, the middle layer is a foaming layer, the outermost layer is a skin solid layer, the inner layer solid skin is made of Low Density Polyethylene (LDPE), and the middle layer is made of a mixture of High Density Polyethylene (HDPE) and low density polyethylene. The invention has the advantages of small cable diameter, large accommodation logarithm, good high-frequency performance, material saving, cost reduction and suitability for the size of the existing urban telephone pipeline.
Description
The invention belongs to telecommunication cable and manufacture method thereof.
Raising along with social productive forces, telecommunications have obtained swift and violent development, the continuous increase of phone installation number, post and telecommunications department faces the problem that how to make full use of existing pipeline and increase cable capacity, and adopting the insulating barrier physical blowing is the effective way that addresses this problem.People wish and can increase the unit cable capacity under the condition that does not increase external diameter that one of its approach is: reduce the conductor lines footpath, conductor lines footpath 0.4mm is reduced to 0.32mm, but decay also will have bigger increase, limit subscribers feeder length; Two of its approach is: the conductor lines footpath is constant, by insulating barrier or the foaming of a part of insulating barrier, reduces its dielectric constant, require when constant in cable mutual capacitance, can reduce the thickness of insulating barrier, reduce the insulated single wire external diameter, thereby in the cable of same diameter, can hold more logarithm.Domestic have only the foam core skin to insulate, and foaming method adopts chemical blowing.
The objective of the invention is to develop a kind of employing physical blowing layer, the attenuate thickness of insulating layer, it is big to have a capacity, and external diameter is little, the telecommunication cable that cost is low.
The structure of cable of the present invention is at copper conductor 1, covers the solid endothelium 2 of a bed thickness 10 μ m on the surface, and the intermediate layer is foaming layer 3, and thickness is 65 μ m, and outermost layer is an epidermis solid layer 4, and thickness is 45～50 μ m.The solid endothelium of internal layer is earlier with low density polyethylene (LDPE) (LDPE), and its melt index is 0.7g/10min, and its effect is the air-tightness that increases the adhesion strength of insulation and conductor and improve insulating barrier, and this one deck should approach a bit as far as possible, to reduce its influence to the insulative dielectric constant.Intermediate layer foaming layer material is the mixture of a kind of high density polyethylene (HDPE) (HDPE) and low density polyethylene (LDPE) (LDPE), and the number of LDPE is 33%, adds 2% nucleator.Wherein HDPE plays a crucial role, its properties influence foaming process, and the main effect of LDPE is to help feeding when the high fusion index of high-crystallinity.HDPE should have preferably when physical blowing: density is greater than 0.960g/cm
3, melt index is at 7～8g/10min, high-crystallinity, very narrow molecular weight distribution.The effect of nucleator is to form uniform bubble when helping nitrogen to be injected at dissolved polymers.The maximum foam degrees of physical blowing reaches 70%.Outer epidermis solid layer adopts high density polyethylene, and its melt index is 0.7g/10min, adds the Masterbatch of 20% amount.
The manufacturing process of HYPA skin/physically foamed cables with structure of outer layer-foamed material-inner, its key are preceding road insulated single wire technology, secondly are back road tension force, the determining of laying up diameter.Its single line technological process is as follows:
One, wire drawing:
φ 2.5mm copper wire inlet wire pulls into the copper wire that specification is 0.4mm through 17 road moulds, and elongation is 24%, and the outlet mould is 0.406mm, and the degree of depth of copper drawing fluid is 3-5%, and Lapie's oil temperature is no more than 60 ℃.
Two, anneal:
The copper wire that comes out through wire drawing carries out continuous anneal, so that can anneal evenly, anneal voltage 150-160V, anneal electric current are 50-60A.
Three, preheating:
Preheating increases their adhesion in order to reduce the temperature difference of plastic layer to copper wire, and preheat temperature is 100 ℃.
Four, it is three-layer insulated to extrude skin/foam/skin
1, for overcoming skin/foam/bad problem of skin insulation air-tightness in the past, the spy has added the thick solid endothelium of one deck 10 μ m, promptly available low density polyethylene (LDPE) (LDPE), also available high density polyethylene (HDPE) (HDPE) between copper wire and foaming layer.
1.1 the temperature parameter of each section of endothelium plastic extruding machine (℃)
Z
1???Z
2???Z
3???H
1???H
2
150???200???220???230???230
1.2 endothelium extruder screw diameter is 30mm, head pressure is 450-600bar, surpasses 550bar and must change screen pack, and screw speed will be coordinated mutually with linear velocity.
2, crust also is solid skin, adopts HDPE, increases mechanical strength and dielectric strength, and thick is 45-50 μ m.
2.1 each section of crust plastic extruding machine temperature parameter (℃)
Z
1???Z
2???Z
3????Z
4????H
1???H
2???H
3??H
4
150???200???220????240????250????260????250???30
2.2 crust extruder screw diameter is 45mm, head pressure is 500bar, surpasses 600bar and must change screen pack, and screw speed will be coordinated mutually with linear velocity.
2.3 color only is added in this one deck, has significantly reduced the consumption of its Masterbatch, proportioning is generally carried out proportioning in the ratio of screw rod speed, and black is generally 20 ‰, and all the other are at 30-45 ‰.
3, froth bed adopts physical blowing, promptly by pressure N
2Be dissolved in uniformly in high density polyethylene (HDPE) (HDPE) and low density polyethylene (LDPE) (LDPE) molten mixture, high density polyethylene (HDPE) (HDPE) plays a leading role, the main effect of low density polyethylene (LDPE) (LDPE) is to help feeding when the high fusion index of high-crystallinity, also help the stable of abscess, foamed gas adopts N
2, its superiority is the permeability of its high polymer very little, helps generating uniform bubble hole, and nonflammable.
3.1 each section temperature parameter of froth bed extruder (℃)
Z
1???Z
2???Z
3???Z
4???Z
5???Z
6???H
1???H
2???H
3???H
4
80????170???185???195???210????220????230???240???245???250
3.2N
2Injection pressure directly have influence on foam degrees and insulative dielectric constant, thereby have influence on coaxial capacitance, so control N
2Injection pressure be crucial, General N
2Injection pressure be 300bar, produce N
2Pressure is by compressor rotary speed saliva jet size, nozzle model: 9～12L/h; Nitrogen cylinder pressure 8～12MPa.
3.3 a pressure of froth bed extruder is 400bar, greater than 550bar, must change screen pack, screw speed must be coordinated mutually with linear velocity.
3.4 in order to increase work efficiency, adaptation runs up, and prolongs the screw rod life-span, to screw rod operation cooling, distribute heat, screw rod chilling temperature are 90 ℃.
Five, cooling:
Skin/foam/skin the insulated single wire that extrudes once three heads is just cooled off by the Water Tank with Temp.-controlled that moves freely earlier, fully cool off by cold water again, 40-45 ℃ of constant temperature bosh temperature, it can move balance automatically forward or backward, screw speed, the delicate fluctuation of linear velocity and the variation that brings coaxial capacitance.
Six, coaxial capacitance, line diameter detect:
Fully cooling back insulated single wire is through the capacitance detecting instrument, and diameter detecting instrument detects and shows, and can directly feed back to main frame, constant insulated single wire diameter and coaxial capacitance.
Seven, copper wire is the skin/foam/skin physical blowing single line proof voltage power 1.2KV of 0.4mm specification.
Eight, takeup tension 200bar loads with 500mm * 500mm vinyl disc, moves dish certainly, does not stop to put.
Skin/foam/skin physical foam insulation single line mature production technology, the productivity ratio height, as long as the copper material quality is good, linear velocity can reach more than the 2000m/min, the single line steady quality.
Other operation is all with the HYA cable, skin/foam/skin physical blowing single line does not resemble solid single line, and it has certain elasticity, and insulation is easily by drawing-down, and also easily scratch, road tension force must strictly be controlled after the institute, must adopt bright and clean accurate mould, and pair twist and stranding speed are unsuitable too fast, wrapping, mask tape degree of tightness also will suit during stranding, the external diameter of final HYPA2400 * 2 * 0.4 is about 68mm, be about 72mm and HYA2400 * 2 * 0.4 cables are outer, and every performance is all up to standard.
Advantage of the present invention:
Comparison with foam/skin (chemical blowing) cable
1, do not influence dielectric behavior;
2, the adhesiveness to copper wire is better than foam/skin cable;
3, the electrical strength to insulation is better than foam/skin cable, and outstanding advantage is that cable size is little, and it is big to hold logarithm, and high frequency performance is good, saves material simultaneously, reduces cost.
Accompanying drawing 1 is the sectional view of cable of the present invention
Accompanying drawing 2 is skin/foam/skin physical foam insulation single line technological process of production figure
The comparison of ANSI/ICEA S-85-625-1989 international advanced standard and this product measured value.
| Cross talk characteristic project and unit | Frequency MH 2 | Average power and (0.4mm line footpath) | Bad line is to power and (0.4mm line footpath) | ||
| The international standard value | The actual measurement of this product | The international standard value | The actual measurement of this product | ||
| Far-end crosstalk attentuation (ELFEXT) | ????0.150 | ????52 | ????59.78 | ????52 | ????55.30 |
| ????0.772 | ????42 | ????46.85 | ????38 | ????42.08 | |
| ????1.024＞ | ????40 | ????44.50 | ????36 | ????39.86 | |
| ????1.600 | ????20 | ????40.64 | ????32 | ????36.10 | |
| ????3.150 | ????30 | ????34.90 | ????26 | ????30.02 | |
| ????6.300 | ????24 | ????20 | ????20.36 | ||
| Near-end crosstalk attenuation (NEXT) | ????0.150 | ????58 | ????62.34 | ????53 | ????57.65 |
| ????0.772 | ????47 | ????51.83 | ????42 | ????46.38 | |
| ????1.024＞ | ????45 | ????50.69 | ????40 | ????46.03 | |
| ????1.600 | ????42 | ????47.00 | ????38 | ????42.13 | |
| ????3.150 | ????30 | ????43.70 | ????33 | ????37.91 | |
| ????6.300 | ????30 | ????39.42 | ????29 | ????34.20 | |
Claims (5)
1. a skin/physically foamed cables with structure of outer layer-foamed material-inner is characterized in that at copper conductor 1, covers the solid endothelium 2 of a bed thickness 10 μ m on the surface, and the intermediate layer is foaming layer 3, and thickness is 65 μ m, and outermost layer is an epidermis practice layer 4, and thickness is 45～50 μ m.
2. foamed cable as claimed in claim 1 is characterized in that solid endothelium low density polyethylene (LDPE) (LDPE), and its melt index is 0.7g/10min.
3. foamed cable as claimed in claim 1 is characterized in that intermediate layer material is the mixture of high density polyethylene (HDPE) (HDPE) and low density polyethylene (LDPE) (LDPE), and the number of LDPE is 33%, adds 2% nucleator, and the density of HDPE is greater than 0.960g/cm
3, melt index is at 7～8g/10min, noble and unsullied brilliant degree, very narrow molecular weight distribution.
4. foamed cable as claimed in claim 1 is characterized in that outer epidermis solid layer adopts high density polyethylene, and its melt index is 0.7g/10min, adds the Masterbatch of 20% amount.
5. the manufacture craft of skin born of the same parents foam/skin physical blowing cable is characterized in that key is preceding road insulated single wire technology, secondly is road, back tension force, and the single line technological process is as follows:
One, wire drawing:
φ 2.5mm copper wire inlet wire pulls into the copper wire that specification is 0.4mm through 17 road moulds, and elongation is 24%, and the outlet mould is 0.406mm, and the degree of depth of copper drawing fluid is 3-5%, and Lapie's oil temperature is no more than 60 ℃;
Two, anneal:
The copper wire that comes out through wire drawing carries out continuous anneal, and anneal voltage 150-160V, anneal electric current are 50-60A;
Three, preheating:
Preheat temperature is 100 ℃;
Four, it is three-layer insulated to extrude skin/foam/skin
A, the thick solid endothelium of one deck 10mm, promptly available low density polyethylene (LDPE) (LDPE), also available high density polyethylene (HDPE) (HDPE) between copper wire and foaming layer, have been added;
A. the temperature parameter of each section of endothelium plastic extruding machine (℃)
Z
1????Z
2????Z
3????H
1????H
2
150????200????220????230????230
B. endothelium extruder screw diameter is 30mm, and head pressure is 450-600bar, surpasses 550bar and must change screen pack, and screw speed will be coordinated mutually with linear velocity;
C. each section of crust plastic extruding machine temperature parameter (℃)
Z
1????Z
2????Z
3????Z
4????H
1????H
2????H
3????H
4
150????200????220????240????250????260????250????30
D. crust extruder screw diameter is 45mm, and head pressure is 500bar, surpasses 600bar and must change screen pack, and screw speed will be coordinated mutually with linear velocity;
E. color only is added in this one deck, has significantly reduced the consumption of its Masterbatch, and proportioning is generally carried out proportioning in the ratio of screw rod speed, and black is generally 20 ‰, and all the other are at 30-45 ‰;
F. froth bed adopts physical blowing, promptly by pressure N
2Be dissolved in uniformly in high density polyethylene (HDPE) (HDPE) and low density polyethylene (LDPE) (LDPE) molten mixture, foamed gas adopts N
2
G. each section temperature parameter of froth bed extruder (℃)
Z
1???Z
2???Z
3???Z
4???Z
5???Z
6????H
1???H
2???H
3???H
4
80????170???185???195???210???220????230???240???245???250
H.N
2Injection pressure directly have influence on foam degrees and insulative dielectric constant, thereby have influence on coaxial capacitance, so control N
2Injection pressure be crucial, General N
2Injection pressure be 300bar, produce N
2Pressure is by compressor rotary speed saliva jet size, nozzle model: 9～12L/h; Nitrogen cylinder pressure 8～12MPa;
I. a pressure of froth bed extruder is 400bar, greater than 550bar, must change screen pack, and screw speed must be coordinated mutually with linear velocity;
J. to screw rod operation cooling, distribute heat, screw rod chilling temperature are 90 ℃;
Five, cooling:
Skin/foam/skin the insulated single wire that extrudes once three heads is just cooled off by the Water Tank with Temp.-controlled that moves freely earlier, fully cool off by cold water again, 40-45 ℃ of constant temperature bosh temperature, it can move balance automatically forward or backward, screw speed, the delicate fluctuation of linear velocity and the variation that brings coaxial capacitance;
Six, coaxial capacitance, line diameter detect:
Fully cooling back insulated single wire is through the capacitance detecting instrument, and diameter detecting instrument detects and shows, and can directly feed back to main frame, constant insulated single wire diameter and coaxial capacitance;
Seven, copper wire is the skin/foam/skin physical blowing single line proof voltage power 1.2KV of 0.4mm specification;
Eight, takeup tension 200bar loads with 500mm * 500mm vinyl disc, moves dish certainly, does not stop to put.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97100476 CN1162822A (en) | 1997-02-14 | 1997-02-14 | skin/foam/skin physical foaming cable and manufacturing process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97100476 CN1162822A (en) | 1997-02-14 | 1997-02-14 | skin/foam/skin physical foaming cable and manufacturing process thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1162822A true CN1162822A (en) | 1997-10-22 |
Family
ID=5165078
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97100476 Pending CN1162822A (en) | 1997-02-14 | 1997-02-14 | skin/foam/skin physical foaming cable and manufacturing process thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1162822A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101667472B (en) * | 2008-09-03 | 2012-02-29 | 科络普线束技术(太仓)有限公司 | Sheathed electric lead |
| CN102945712A (en) * | 2012-11-07 | 2013-02-27 | 江苏西贝电子网络有限公司 | Coaxial cable core production process |
| CN102982913A (en) * | 2012-11-22 | 2013-03-20 | 安徽天星光纤通信设备有限公司 | Extrusion and exhausting device for insulation layer of serial line |
| CN102982902A (en) * | 2012-11-22 | 2013-03-20 | 安徽天星光纤通信设备有限公司 | Method for producing serial line |
| CN103871560A (en) * | 2014-02-23 | 2014-06-18 | 安徽华海特种电缆集团有限公司 | Low-smoke halogen-free anti-interference digital signal cable for railway |
| CN104575753A (en) * | 2013-10-18 | 2015-04-29 | 宁夏海洋线缆有限公司 | Novel water and fire blocking cable |
| CN105068198A (en) * | 2015-07-20 | 2015-11-18 | 四川天邑康和通信股份有限公司 | Physical foaming coating layer tight tube fiber production process |
| CN105390207A (en) * | 2015-12-08 | 2016-03-09 | 浙江兆龙线缆有限公司 | Eight-type cable shielding structure |
| CN109263709A (en) * | 2017-07-18 | 2019-01-25 | 宜兴市泰宇汽车零部件有限公司 | A kind of dual density EPP foaming steering wheel |
| CN110136887A (en) * | 2019-05-09 | 2019-08-16 | 安徽龙庵电缆集团有限公司 | A kind of production method of wear-resistant tensile flexible cable |
-
1997
- 1997-02-14 CN CN 97100476 patent/CN1162822A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101667472B (en) * | 2008-09-03 | 2012-02-29 | 科络普线束技术(太仓)有限公司 | Sheathed electric lead |
| CN102945712A (en) * | 2012-11-07 | 2013-02-27 | 江苏西贝电子网络有限公司 | Coaxial cable core production process |
| CN102982913A (en) * | 2012-11-22 | 2013-03-20 | 安徽天星光纤通信设备有限公司 | Extrusion and exhausting device for insulation layer of serial line |
| CN102982902A (en) * | 2012-11-22 | 2013-03-20 | 安徽天星光纤通信设备有限公司 | Method for producing serial line |
| CN102982902B (en) * | 2012-11-22 | 2015-10-07 | 安徽天星光纤通信设备有限公司 | A kind of production method of tandem wire |
| CN104575753A (en) * | 2013-10-18 | 2015-04-29 | 宁夏海洋线缆有限公司 | Novel water and fire blocking cable |
| CN103871560A (en) * | 2014-02-23 | 2014-06-18 | 安徽华海特种电缆集团有限公司 | Low-smoke halogen-free anti-interference digital signal cable for railway |
| CN103871560B (en) * | 2014-02-23 | 2015-12-02 | 安徽华海特种电缆集团有限公司 | The anti-interference railway digital signal cable of a kind of low smoke and zero halogen |
| CN105068198A (en) * | 2015-07-20 | 2015-11-18 | 四川天邑康和通信股份有限公司 | Physical foaming coating layer tight tube fiber production process |
| CN105390207A (en) * | 2015-12-08 | 2016-03-09 | 浙江兆龙线缆有限公司 | Eight-type cable shielding structure |
| CN109263709A (en) * | 2017-07-18 | 2019-01-25 | 宜兴市泰宇汽车零部件有限公司 | A kind of dual density EPP foaming steering wheel |
| CN110136887A (en) * | 2019-05-09 | 2019-08-16 | 安徽龙庵电缆集团有限公司 | A kind of production method of wear-resistant tensile flexible cable |
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