CN102643473B - Polyethylene compound used for long-service-life electrolysis cathode plate sealing strip and preparation method thereof - Google Patents
Polyethylene compound used for long-service-life electrolysis cathode plate sealing strip and preparation method thereof Download PDFInfo
- Publication number
- CN102643473B CN102643473B CN201210139312.1A CN201210139312A CN102643473B CN 102643473 B CN102643473 B CN 102643473B CN 201210139312 A CN201210139312 A CN 201210139312A CN 102643473 B CN102643473 B CN 102643473B
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- China
- Prior art keywords
- negative plate
- sealed strip
- polyethylene
- long life
- mixing material
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0022—Combinations of extrusion moulding with other shaping operations combined with cutting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/07—Flat, e.g. panels
- B29C48/08—Flat, e.g. panels flexible, e.g. films
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
- B29C48/397—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using a single screw
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
- B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
Abstract
The invention provides a compound used for a long-service-life electrolysis cathode plate sealing strip and a preparation method thereof, belonging to the technical field of plastic processing and application and the technical field of wet electrolysis of metals such as copper. The components used for producing the electrolysis cathode plate sealing strip include 100 parts of polyethylene resin, 0.1-20 parts of linear low density polyethylene, 0.1-1 part of oxidization inhibitor, 0.05-1 part of metal deactivator, 0.1-5 parts of flow modifier and a proper amount of colorant according to weight parts. The compound has the characteristics of long service life and smooth surface of the molded sealing strip.
Description
Technical field
The present invention relates to long lifetime polyethylene mixing material and preparation method for a kind of electrolytic negative plate sealed strip, there is the feature of life-span length, good toughness, belong to the wet method electrolysis technical field of the metals such as plastics processing and application technology and copper.
Background technology
At present, suitability for industrialized production high purity copper, manganese, zinc mainly adopt the method for electrolysis.Wherein, important production parts are negative plate, by electrode, introduce negative charge, and bivalent cupric ion or mn ion, zine ion reduce and form copper, manganese, zinc on negative plate, then by the unit of delaminating, cathode copper are peeled, and form highly purified metal.Negative plate mainly adopts stainless steel or titanium to make, and for reaching the object of insulation, shape of product rule, on the both sides of negative plate, need to add one deck insulated enclosure bar.
The production method of sealed strip is: 1) by forcing machine, polyethylene melting directly extruded and is attached on negative plate, and then cooling; 2) first produce insulated enclosure bar, then be set on negative plate, can be with reference to Granted publication CN 201169646Y(application number 200820096325.4) structure of the sealed insulation contained side bar > > of < < electrolytic negative plate, the sealed strip of this structure is comprised of sealed insulation bar contained side and tensioning rod, under the effect of tensioning rod, sealed edge is clamped to negative plate.No matter be the first or the second production method, manufacturer all adopts the polythene material of suitability for industrialized production at present, simultaneously due to electrolyte temperature in electrolyzer higher (electrolytic copper temperature is generally at 65 ℃), material is subject to thermo-oxidative ageing, in addition in electrolytic solution, exist and contain transition metal, degradation process is accelerated, and the sealed strip life-span of producing is in this way generally about 3 months.After insulated enclosure bar is aging, cause the electrolytic copper of producing to occur deformity, the problem such as knob, end face be uneven as occurred, affects production marketing.While reusing, first sealed strip is peeled from negative plate, then to the polishing of sealed strip place, again melt extrude moulding, this has increased labour intensity greatly, and production efficiency is not high yet.
As can be seen here, more there is the defects such as toughness is low, the life-span is short in existing contained side bar.
Summary of the invention
For the deficiencies in the prior art, the invention provides a kind of long lifetime polyethylene mixing material for electrolytic negative plate sealed strip, by extrusion by melting, produce sealed strip, use High molecular weight polyethylene resin, be aided with linear low density polyethylene resin simultaneously and improve its toughness, add oxidation inhibitor and metal passivator that its life-span is increased substantially, add flow ability modifying agent to improve the processing characteristics of constituent and the apparent property of goods.Except this, the present invention also provides the preparation method of this mixing material.
The scheme solving the problems of the technologies described above is:
Long life electrolysis negative plate sealed strip polyethylene mixing material, unit meter contains 100 parts of polyvinyl resins by weight, linear low density polyethylene resin 0.1-20 part, oxidation inhibitor 0.1-1 part, metal passivator 0.05-1 part, flow ability modifying agent 0.1-5 part, amount of colorant.
Described long life electrolysis negative plate sealed strip polyethylene mixing material, in preferred scheme, described polyvinyl resin is multipolymer, comonomer is alpha-olefin, its density>=0.0.940g/cm
3, melt flow rate (MFR)≤1.0g/10min;
Described long life electrolysis negative plate sealed strip polyethylene mixing material, in preferred scheme, described linear low density polyethylene resin is multipolymer, comonomer is alpha-olefin, its density≤0.926g/cm
3, melt flow rate (MFR)≤2.0g/10min;
Described long life electrolysis negative plate sealed strip polyethylene mixing material, in preferred scheme, described oxidation inhibitor is Hinered phenols or amine primary antioxidant and phosphorous acid esters auxiliary antioxidant, the part by weight of major-minor oxidation inhibitor is 1:0.2-3;
Described long life electrolysis negative plate sealed strip polyethylene mixing material, in preferred scheme, described metal passivator is acid amides or hydrazide kind compound;
Described long life electrolysis negative plate sealed strip polyethylene mixing material, in preferred scheme, described flow ability modifying agent is one or more mixture of following material: polyethylene wax, paraffin, Poly Propylene Wax, oxidized polyethlene wax, brown coal ester type waxes, calcium stearate, Zinic stearas, silicone lubricant, fluorinated lubricant;
Described long life electrolysis negative plate sealed strip polyethylene mixing material, in preferred scheme, described amount of colorant is carbon black or its masterbatch, the mass concentration of described black masterbatch is 5%-50%.
The preparation method of polyethylene mixing material for long lifetime long life electrolysis negative plate sealed strip, is undertaken by following operation:
A) by weight, by polyvinyl resin, linear low density polyethylene resin, oxidation inhibitor, flow ability modifying agent, tinting material is even in stirrer for mixing, squeezes into feed bin;
B), by twin screw or single Screw Extrusion granulation for the compound in feed bin, processing parameter is selected as follows:
Body temperature: 170-220 ℃, 190-220 ℃, 200-225 ℃, 210-230 ℃, 210-230 ℃, 210-230 ℃, head temperature: 210-220 ℃;
Engine speed: 30-60 rev/min, feeding rotating speed: 160-180 rev/min;
C) the pellet paper and plastics compound bag packing being cut into.
The present invention is by use High molecular weight polyethylene resin to be aided with the toughness of linear low density polyethylene resin constituent simultaneously, can meet the requirement to sealed strip toughness when mechanically peel of the industries such as electrolytic copper, add functional polymer greatly to increase the bounding force of constituent and negative plate, sealing effectiveness wind strengthens greatly, overcome the phenomenon of electrolytic solution infiltration sealing place, add oxidation inhibitor to improve the life-span of the heat-resisting oxygen of constituent, metal passivator makes transition metal ion significantly reduce the catalyzed degradation effect of constituent, its life-span can be increased to more than 2 years, the tinting material carbon black adding or its masterbatch, there is the effect of anti-photoaging, can improve storage and the work-ing life of sealed strip.
Embodiment
The present invention proposes polyethylene mixing material and preparation method thereof for long life electrolysis negative plate sealed strip, and the material that it adopts has: polyvinyl resin, linear low density polyethylene resin, oxidation inhibitor, metal passivator, flow ability modifying agent, amount of colorant.
Described polyvinyl resin is density or high density polyethylene(HDPE) in copolymerized macromolecule amount, and property indices requirement is: comonomer is alpha-olefin, its density>=0.940g/cm
3, melt flow rate (MFR)≤1.0g/10min.
Described linear low density polyethylene resin is multipolymer, and comonomer is alpha-olefin, its density≤0.926g/cm
3, melt flow rate (MFR)≤2.0g/10min.The object that adds type low density polyethylene resin is further to improve the toughness of constituent.
Described oxidation inhibitor is Hinered phenols material, and its effect is to catch polyethylene in processing or use procedure, be heated or be subject to the free radical that ultraviolet effect forms, and guarantees the life-span of materials'use.
Described metal passivator is acid amides or hydrazide kind compound, metal passivator add can with electrolytic solution in transition metal ion especially cupric ion, iron ion form inner complex, reduce the catalyzed degradation of transition metal ion to constituent, thereby improve its life-span.
The flow ability modifying agent adding can improve the mobility of constituent, the electric current of forcing machine while reducing extrusion moulding, and the sealed strip smooth surface of simultaneously producing, is conducive to peeling off of electrolytic metal.
The tinting material carbon black adding or its masterbatch, be the screener of UV-light, the free radical that can be produced by uviolizing, storage and the work-ing life of improving sealed strip.
Below the embodiment of several different proportionings of the present invention:
The present invention prepares long life electrolysis negative plate sealed strip:
A) by weight, polyvinyl resin, linear low density polyethylene resin, oxidation inhibitor, metal passivator, lubricant, tinting material is even in stirrer for mixing, squeeze into feed bin;
B), by twin screw or single Screw Extrusion granulation for the compound in feed bin, processing parameter is selected as follows:
Body temperature: 170-220 ℃, 190-220 ℃, 200-225 ℃, 210-230 ℃, 210-230 ℃, 210-230 ℃, head temperature: 210-220 ℃;
Engine speed: 30-60 rev/min, feeding rotating speed: 160-180 rev/min;
C) the pellet paper and plastics compound bag packing being cut into.
The performance representative value of the mixing material that the present invention obtains is in Table 1.
The performance performance representative value of polyethylene mixing material for table 1 long life electrolysis negative plate sealed strip
1 | Tensile strength (MPa) | ≥25 |
2 | Elongation at break (%) | ≥350 |
3 | Oxidation induction time (min, 200 ℃) | ≥200 |
4 | 20 ℃ of volume specific resistances (Ω cm) | ≥1.5×10 13 |
5 | Dielectric strength (MV/m, 20 ℃) | ≥25.6 |
6 | Embrittlement temperature (℃) | <-70 |
As can be seen from the above table, good technique effect of the present invention is embodied in:
1, in mixing material, added oxidation inhibitor, metal passivator, the life-span of material extends greatly, can reach more than 2 years;
2, toughness of material is good, can stand the impact of mechanical force when peeling off, not broken;
3, in mixing material, add flow ability modifying agent can improve Drawing abillity, the sealed strip smooth surface of simultaneously processing, the cathode copper of production, manganese, zinc easily get off from sur-face peeling.
Mixing material of the present invention can adopt single screw rod to carry out the production of insulated enclosure bar, and processing temperature is: fuselage 180-220 ℃, head 210-230 ℃.Above processing condition can be adjusted as the case may be, and generally, top temperature is not generally over 240 ℃.
It should be pointed out that above embodiment is the more representational example of the present invention, obvious technical scheme of the present invention is not limited to above-described embodiment.Can also there be a lot of distortion.Those of ordinary skill in the art, from then on, with disclosed can mention or it is associated in invention, all should think the claimed scope of this patent.
Claims (6)
1. long life electrolysis negative plate sealed strip polyethylene mixing material, is characterized by: unit meter by weight, contains 100 parts of polyvinyl resins, linear low density polyethylene resin 0.1-20 part, oxidation inhibitor 0.1-1 part, metal passivator 0.05-1 part, flow ability modifying agent 0.1-5 part, amount of colorant; Described polyvinyl resin is multipolymer, and comonomer is alpha-olefin, its density>=0.935g/cm
3, melt flow rate (MFR)≤1.0g/10min; Described oxidation inhibitor is Hinered phenols or amine primary antioxidant and phosphorous acid esters auxiliary antioxidant, and the part by weight of major-minor oxidation inhibitor is 1:0.2-3; Described metal passivator is acid amides or hydrazide kind compound; Described flow ability modifying agent is one or more mixture of following material: polyethylene wax, paraffin, Poly Propylene Wax, oxidized polyethlene wax, brown coal ester type waxes, calcium stearate, Zinic stearas, silicone lubricant, fluorinated lubricant.
2. long life electrolysis negative plate sealed strip polyethylene mixing material according to claim 1, is characterized by: described linear low density polyethylene resin is multipolymer, and comonomer is alpha-olefin, its density≤0.926g/cm
3, melt flow rate (MFR)≤2.0g/10min.
3. long life electrolysis negative plate sealed strip polyethylene mixing material according to claim 1, is characterized by: the part by weight of major-minor oxidation inhibitor is 1:0.2-3.
4. long life electrolysis negative plate sealed strip polyethylene mixing material according to claim 1, is characterized by: described tinting material is carbon black or its masterbatch.
5. long life electrolysis negative plate sealed strip polyethylene mixing material according to claim 4, is characterized by: the mass concentration of described black masterbatch is 5%-50%.
6. according to the arbitrary described long life electrolysis negative plate sealed strip of claim 1-5, use the preparation method of polyethylene mixing material, it is characterized by: by following operation, undertaken:
A) by weight, by polyvinyl resin, linear low density polyethylene resin, oxidation inhibitor, metal passivator, flow ability modifying agent, tinting material are even in stirrer for mixing, squeeze into feed bin;
B), by twin screw or single Screw Extrusion granulation for the compound in feed bin, processing parameter is selected as follows:
Body temperature: 170-220 ℃, 190-220 ℃, 200-225 ℃, 210-230 ℃, 210-230 ℃, 210-230 ℃, head temperature: 210-220 ℃;
Engine speed: 30-60 rev/min, feeding rotating speed: 160-180 rev/min;
C) the pellet paper and plastics compound bag packing being cut into.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN201210139312.1A CN102643473B (en) | 2012-05-08 | 2012-05-08 | Polyethylene compound used for long-service-life electrolysis cathode plate sealing strip and preparation method thereof |
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CN201210139312.1A CN102643473B (en) | 2012-05-08 | 2012-05-08 | Polyethylene compound used for long-service-life electrolysis cathode plate sealing strip and preparation method thereof |
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CN102643473A CN102643473A (en) | 2012-08-22 |
CN102643473B true CN102643473B (en) | 2014-04-02 |
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Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN1407009A (en) * | 2001-08-24 | 2003-04-02 | 夏平 | Antistatic polyolefine film |
CN1464005A (en) * | 2002-06-11 | 2003-12-31 | 上海高分子功能材料研究所 | Silicon alkyl cross bonding polyethylene fire-retardancy insulating plastics |
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Publication number | Priority date | Publication date | Assignee | Title |
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CN1407009A (en) * | 2001-08-24 | 2003-04-02 | 夏平 | Antistatic polyolefine film |
CN1464005A (en) * | 2002-06-11 | 2003-12-31 | 上海高分子功能材料研究所 | Silicon alkyl cross bonding polyethylene fire-retardancy insulating plastics |
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