CN1059229A - Fabricating technology for polyperfluoroethyl propylene cable sheath - Google Patents
Fabricating technology for polyperfluoroethyl propylene cable sheath Download PDFInfo
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- CN1059229A CN1059229A CN 90106354 CN90106354A CN1059229A CN 1059229 A CN1059229 A CN 1059229A CN 90106354 CN90106354 CN 90106354 CN 90106354 A CN90106354 A CN 90106354A CN 1059229 A CN1059229 A CN 1059229A
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Abstract
A kind of fabricating technology for polyperfluoroethyl propylene cable sheath comprises welding, it is stupefied to rise, flange and several parts of tempering, its flanging process is to carry out in sodium nitrate and potassium nitrate fused salt mixt, temperature of molten salt is 280～310 ℃, heating and temperature control was advisable at 2～10 seconds, was welded under 190～220 ℃ of temperature to carry out.Adopt this process, preparation process is simple, and good product performance can be used for doing ionic membrane caustic soda equipment electrolysis tank end plate cable cover(ing).
Description
The present invention is to be a kind of process of feedstock production cable cover(ing) with the polyfluorinated ethylene membrane.
In basic industry, ionic membrane caustic soda equipment for example need be to making protective sleeve to satisfy in the production process protection requirement to cable (electrode) with special plastics on the electrolysis tank cable jacket.This class cable cover(ing) is made by fluoro-containing plastic mostly, and wherein a kind of of better performances is to be the cable cover(ing) of feedstock production with the polyfluorinated ethylene membrane.This jacket wall is thin, high, the good insulation preformance of tensile strength, and high temperature resistant.But because sheath film thickness little (about 0.25mm), sheath is a frame shape (a for example rectangular frame), and its flanging process difficulty is big, though therefore this product is arranged abroad, really few to its preparation technology's report.
The purpose of this invention is to provide a kind of is the preparation technology of its cable cover(ing) of feedstock production with the polyfluorinated ethylene membrane.Its process mainly comprises: welding procedure, stupefied technology, flanging process and several parts of tempering process, soon press the polyfluorinated ethylene membrane sheet that the blanking of sheath size becomes, be connected into a film cylinder along the one edge weld, shape according to cable (or electrode) becomes a solid shape (for example rectangular cylinder) with film cylinder, translate into frame shape outside the film cylinder two ends with definite shape again, obtain product for the external form of fixed sheath is fixed in the temper that heats up on the mould at last.Be described in detail preparation process of the present invention below.
1, welding procedure
Welding procedure is that the polyfluorinated ethylene membrane sheet is welded into a film cylinder along the one opposite side, adopts welding equipment such as plastic hot welding equipment, but because perfluoroethylene-propylene fusing point height welds under the temperature of having relatively high expectations, thereby the weldering cutter should be able to reach more than 350 ℃.Welding condition is the essential condition of welding procedure, should carry out in 190～220 ℃ of temperature, and be advisable with 5～30 seconds weld time.In welding, work as welding temperature low excessively (below 190 ℃) or weld time too short (less than 5 seconds).Film seam crossing transparency is bad, and is easily porose on the weld seam, and it is lower to test its seam crossing hot strength.But when welding temperature too high (more than 220 ℃) or weld time long (greater than 30 seconds), film easily is bonded on the weldering cutter edge of a knife, even if coat remover on the weldering cutter edge of a knife, still difficulty avoids film to glue the edge of a knife fully.It is preferable, and to do the industry condition be 200～210 ℃ of welding temperatures, and be 10～15 seconds weld time.
2, play stupefied technology
The film cylinder that will be welded into cylinder according to the profile of cable (or electrode) is fixed into a cylindricality (for example rectangle), promptly plays stupefied technology.Its process is film cylinder to be inserted in make its setting on the mould at a certain temperature, the simplest practice is that the film cylinder that will be inserted on the mould boils certain hour (5～30 minutes) in water, also can in baking oven, carry out its heating-up temperature and not have strict restriction, but should too highly not make its distortion, generally be advisable with 90～150 ℃.As cable (or electrode) is cylindrical, then can remove this technical process from.
3, flanging process
Cable cover(ing) is a frame structure, translates into frame-type outside the cylindricality film cylinder two ends of rising after stupefied.The part film size will increase in turn-up process, so partial thin film thickness will reduce, and is even for guaranteeing this part change in film thickness, should strict its heating-up temperature of control and time in the turn-up process.For finishing local warming's process of flanging process, can in fused salt, carry out, for example potassium nitrate was controlled at 2～10 seconds or/and the sodium nitrate salt-mixture makes its temperature of molten salt be controlled at 280～310 ℃ heating time.When too high as temperature of molten salt in the turn-up process (more than 310 ℃) perfluoroethylene-propylene will become fragile, be easy to generate crackle during flange, but temperature course low (below 280 ℃) deformation of thin membrane amount is little, the easy warpage of edge and corner position produces hard angle behind the flange.Heating time is relevant with temperature of molten salt, and when temperature of molten salt was higher, should lack heating time, and temperature of molten salt is lower, and heating time is then long, but heating time is too short, operate 290～300 ℃ of the temperature of molten salt of restive, preferable flanging process control, warm-up time is 5～7 seconds.
4, tempering process
Temper technology is that the product after the moulding is put into mould, heat-treats, and makes it can be fixed-type.Temper can be carried out in baking oven (or high temperature furnace), the condition and range of temper requires broad, all can carry out being lower than under the welding temperature, generally be advisable with 130～170 ℃, tempering insulation time is advisable to be no less than 5 minutes, after the temper product is reduced to room temperature, go to obtain product after mould, the shaping.Below by example technical process of the present invention is described further.
Example 1, the preparation of perfluoroethylene-propylene cable cover(ing)
Get polyfluorinated ethylene membrane (thickness 0.25mm) and press the blanking of cable profile,, use polytetrafluoroethylene film sheet pad good up and down, weld its diaphragm butt joint (about overlapping 5mm); Earlier remover (organic siliconresin) is coated in during welding on the weldering cutter edge of a knife, slowly heating, treat solvent evaporates after, be heated to welding temperature again, insulation is carried out soldering after half an hour, welding temperature is 200 ℃, be 15 seconds weld time; The film cylinder that is welded into is inserted in to be put into water and boiled 20 minutes on the rectangular mould, play stupefied one-tenth rectangle column casing, moves back mould and carries out flange; The desirable sodium nitrate of used fused salt (65%) potassium nitrate (35%) mixed nitrate is heated to 290 ℃ and becomes liquid fused salt, heating is immersed in the fused salt at rectangle column casing two ends respectively took out rapidly at the mould upper overturning in about 7 seconds, repeated multiple times (each corner angle once) is finished flanging process and is handled, at last product is fixed on and puts into baking oven on the mould and carried out temper 40 minutes in 130 ℃, take out and reduce to room temperature, move back mould, shaping gets product.
Comparative example 1, welding condition is got polyfluorinated ethylene membrane of the same race to the influence of welding effect, utilizes different welding temperature and time welding effect such as the tables 1 of identical device (as example 1) control.
Table 1 welding temperature and time butt welding connect the influence of effect
| Temperature (℃) | 180 | 190 | 205 | 220 | 230 |
| Time (second) | 45 | 30 | 10 | 5 | 4 |
| The processing situation | The bad film of degree easily takes off cutter when saturating | The good film of transparency easily takes off cutter | The good film of transparency easily takes off cutter | The good film of transparency can take off cutter | Film glues cutter |
| Seam connects stretches intensity (MPa) | 20.9 | 39.8 | 44.0 | 45.0 | 40.0 |
Annotate: the raw material hot strength is 26.6MPa
Comparative example 2, the flange condition is to the influence of product
Made stupefied back product by example 1, carry out flange after (sodium nitrate 50% potassium nitrate 50% mixes) heating in identical fused salt, the product apparent property is as shown in table 2 behind the flange.
Table 2 flange condition influences part performance
| Temperature (℃) | 270 | 280 | 290 | 300 | 310 | 320 |
| Time (second) | 15 | 10 | 7 | 5 | 2 | 2 |
| Performance | Edge and corner position warps | Having hard angular convolution fire to handle the back behind the flange slightly disappears | Flange is even | Flange is even | Film is hardening slightly | Flange goes out crackle |
By above-mentioned example and comparative example, adopt production technology provided by the invention, easy to operate, can prepare the perfluoroethylene-propylene cable cover(ing) preferably.
Claims (4)
1, a kind of fabricating technology for polyperfluoroethyl propylene cable sheath comprises welding, plays stupefied, flange and four main processes of tempering, it is characterized in that flanging process is 280～310 ℃ of temperature, and heating time, 2-10 carried out in second.
2, according to the described technology of claim 14, it is characterized in that flanging process heating process can carry out in fused salt, for example potassium nitrate is or/and the sodium nitrate salt-mixture makes its temperature of molten salt be controlled at 280～310 ℃, and preferable temperature of molten salt is 290～300 ℃.
3, according to the described technology of claim 1, it is characterized in that welding procedure should carry out under 190～220 ℃ of temperature, be advisable with 5～30 seconds weld time.
4,, it is characterized in that the preferable condition of welding procedure is 200～210 ℃ of welding temperatures, 10-15 second weld time according to claim 1,3 described technologies.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90106354 CN1059229A (en) | 1990-08-23 | 1990-08-23 | Fabricating technology for polyperfluoroethyl propylene cable sheath |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90106354 CN1059229A (en) | 1990-08-23 | 1990-08-23 | Fabricating technology for polyperfluoroethyl propylene cable sheath |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1059229A true CN1059229A (en) | 1992-03-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90106354 Pending CN1059229A (en) | 1990-08-23 | 1990-08-23 | Fabricating technology for polyperfluoroethyl propylene cable sheath |
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| Country | Link |
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| CN (1) | CN1059229A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104672525A (en) * | 2015-03-11 | 2015-06-03 | 安徽弘博电缆集团有限公司 | Wear-resistant and corrosion-resistant cable sheath for ships, as well as preparation method of cable sheath |
| CN105118585A (en) * | 2015-08-28 | 2015-12-02 | 安徽国能亿盛环保科技有限公司 | Sheath manufacturing method |
| CN105139969A (en) * | 2015-08-28 | 2015-12-09 | 马鞍山市兴隆铸造有限公司 | Cable sheath manufacturing method |
-
1990
- 1990-08-23 CN CN 90106354 patent/CN1059229A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104672525A (en) * | 2015-03-11 | 2015-06-03 | 安徽弘博电缆集团有限公司 | Wear-resistant and corrosion-resistant cable sheath for ships, as well as preparation method of cable sheath |
| CN105118585A (en) * | 2015-08-28 | 2015-12-02 | 安徽国能亿盛环保科技有限公司 | Sheath manufacturing method |
| CN105139969A (en) * | 2015-08-28 | 2015-12-09 | 马鞍山市兴隆铸造有限公司 | Cable sheath manufacturing method |
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| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |