CN107216556A - A kind of titanium starting sheet bound edge rubber and the method using the rubber bound edge - Google Patents
A kind of titanium starting sheet bound edge rubber and the method using the rubber bound edge Download PDFInfo
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- CN107216556A CN107216556A CN201710434082.4A CN201710434082A CN107216556A CN 107216556 A CN107216556 A CN 107216556A CN 201710434082 A CN201710434082 A CN 201710434082A CN 107216556 A CN107216556 A CN 107216556A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/16—Elastomeric ethene-propene or ethene-propene-diene copolymers, e.g. EPR and EPDM rubbers
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/08—Macromolecular additives
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
- C09J175/04—Polyurethanes
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C7/00—Constructional parts, or assemblies thereof, of cells; Servicing or operating of cells
- C25C7/02—Electrodes; Connections thereof
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2217—Oxides; Hydroxides of metals of magnesium
- C08K2003/222—Magnesia, i.e. magnesium oxide
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
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- Engineering & Computer Science (AREA)
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- Metallurgy (AREA)
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Abstract
The invention discloses a kind of titanium starting sheet bound edge rubber and using the method for the rubber bound edge, belong to electrolytic cell production electrolytic nickel, tough cathode technical field, solve that titanium starting sheet wrapping process is complicated, service life is short, the problem of electrolytic production quality and low percentage of product.Rubber includes ethylene propylene diene rubber, CSM, stearic acid, paraffin, diethylene glycol (DEG), silica, carbon black, vaseline, oxidation, cumyl peroxide, zinc methacrylate and sulphur, and application method includes：It is determined that compacting size, processing metal surface, compressing and post-processing.Rubber and special bonding agent antiseptic property of the present invention, ageing resistace are excellent, non-conductive, high temperature resistant, cold-hot alternating, be not in become fragile, the situation that bonding force declines, both are high with titanium starting sheet adhesive strength, can seamless binding, avoid producing edge or point effect, rubber and the side of titanium starting sheet four are combined, and eliminate the process of cutting, and improve titanium starting sheet percentage of product, increase the service life, reduce labor intensity.
Description
Technical field
The invention belongs to electrolytic cell production electrolytic nickel, tough cathode technical field, and in particular to a kind of titanium starting sheet bound edge rubber
And use the method for the rubber bound edge.
Background technology
Country's smelting industry and institute, during electrolytic nickel, copper production starting sheet, use plastic clip more at present
The modes such as bar, coating adhesive, injection-moulded plastic bound edge method, need not cut the skill directly used without solution starting sheet well all the time
Art problem, the percent defective produced every time is external at present how symmetrical using being opened on kind of plate both sides of the edge two sides between 10%-20%
V-shaped groove presss from both sides plastic strip bound edge, can only wrap three sides, using effect is not good.
The content of the invention
It is an object of the invention to provide a kind of titanium starting sheet bound edge rubber and using the method for the rubber bound edge, to solve titanium kind
Plate wrapping process is complicated, and service life is short, the problem of influenceing electrolytic production quality and percentage of product.
In order to achieve the above object, the technical solution adopted by the present invention is：
A kind of titanium starting sheet bound edge rubber, rubber of the raw material of following parts by weight by being made up：76-84 parts of ethylene propylene diene rubber, chlorine sulphur
Change 16-24 parts of polyethylene rubber, stearic acid 0.7-1.2,1-2 parts of paraffin, 1-2 parts of diethylene glycol (DEG), 43-50 parts of silica, carbon black
1-3 parts, 4-6 parts of vaseline, 1-3 parts of magnesia, 1-3 parts of cumyl peroxide, 1-2 parts of zinc methacrylate, sulphur 1-2
Part.The special nature of electrowinning process, the common easy aging of elastomeric material, on-insulated and conductive, the present invention is beneficial resistance to from having
The ethylene propylene diene rubber and CSM of soda acid performance, using stearic acid as lubricant, paraffin is protective agent, diethylene glycol (DEG)
For activating agent, silica is filler, and carbon black is pigment, and vaseline is softening agent, and magnesia and cumyl peroxide are friendship
Join agent, zinc methacrylate is assistant crosslinking agent, collectively constitutes the non-conductive rubber of acid and alkali-resistance.
In order to further realize the present invention, rubber is made up of the raw material of following parts by weight：80 parts of ethylene propylene diene rubber, chlorine sulphur
Change 20 parts of polyethylene rubber, stearic acid 1,2 parts of paraffin, 2 parts of diethylene glycol (DEG), 43 parts of silica, 3 parts of carbon black, 5 parts of vaseline, oxygen
Change 3 parts of magnesium, 3 parts of cumyl peroxide, 2 parts of zinc methacrylate, 1.2 parts of sulphur.
A kind of method of use titanium starting sheet bound edge rubber bound edge, comprises the following steps：
Step 1: determining compacting size：
According to finished product starting sheet 880 × 880mm sizes, determine that the width-telescopic amount of bound edge rubber strip is controlled in ± 5mm, determine rubber
The thickness control of adhesive tape is in one side δ=3 ± 2mm, and width is in 20 ± 5mm；
Step 2: processing metal surface：
Remove processing oil, rust or other oxide layers；
Step 3: compressing：
By rubber system into strips, the vitellarium in the middle of titanium starting sheet is protected, in titanium starting sheet surrounding bound edge area, uniformly coating is viscous
Uniform discharge rubber strip after agent is connect, 30-40min is suppressed under 1.4-2.3MPa pressure；Use once that compacting sulfidization molding can be with
Make seamless binding between rubber adhesive tape and titanium starting sheet, titanium starting sheet will not produce " edge effect " or " tip effect in electrolytic process
Should ".
Step 4: post-processing：
Angle between rubber and titanium starting sheet is accomplished 30 ° by shaped article trimmer.
In order to further realize the present invention, the bonding agent described in step 3 is made up of the raw material of following parts by weight：Isocyanide
11-14 parts of acid esters, 1-3 parts of silane coupler, 7-13 parts of chlorinated rubber, 1-2 parts of epoxy resin, -2 parts of silica 1, curing agent
0.5-2 parts, 64-75 parts of dimethylbenzene.Due to the special nature of titanium starting sheet and electrowinning process, usual bonding agent is due to intolerant to lasting height
Gentle titanium plate is immiscible to influence the adhesive strength of rubber and titanium starting sheet, and the present invention is adhesive from isocyanates, and silane is even
Connection agent is coupling agent, and silica is filler, and dimethylbenzene is solvent, constitutes special from oxidized rubber and epoxy resin and curing agent
With bonding agent, the special bonding agent not only can mutually melt but also can be combined with titanium plate with rubber, while also resistance to continuous high temperature, acidproof
It is alkali, non-conductive.
In order to further realize the present invention, the bonding agent described in step 3 is made up of the raw material of following parts by weight：Isocyanide
12 parts of acid esters, 3 parts of silane coupler, 10 parts of chlorinated rubber, 2 parts of epoxy resin, 2 parts of silica, 1 part of curing agent, dimethylbenzene
70 parts.
Having the beneficial effect that compared to prior art of the invention：
The present invention mixes the nonconducting rubber of acid and alkali-resistance and special bonding agent, and antiseptic property, ageing resistace are excellent, do not lead
Electricity, can be replaced with high temperature resistant, cold-hot, be not in become fragile, the situation that bonding force declines, and the rubber and binding agent and base
Body adhesive strength is high, and after bonding once compacting sulfidization molding, seamless binding between rubber adhesive tape and titanium starting sheet is not only avoided
Titanium starting sheet produces " edge effect " or " point effect " in electrolytic process, and the rubber and the side of titanium starting sheet four are combined, and solves
Because adhesive strength is high, four sides can not bound edge, the situation that needs are cut on one side simultaneously, improve the percentage of product of titanium starting sheet,
Titanium starting sheet service life in a cell is extended, labor strength is substantially reduced.
Embodiment
With reference to embodiment, the present invention is described further.
Embodiment 1：
Exemplified by producing 50kg titanium starting sheet bound edge rubber, a kind of titanium starting sheet bound edge rubber is made up jointly of following raw material：
Ethylene propylene diene rubber 25.840kg, CSM 5.440kg, stearic acid 0.238kg, paraffin 0.340kg, two
Glycol 0.340 kg, silica 1 5.300kg, carbon black 0.340kg, vaseline 1.360 kg, magnesia 0.340kg, peroxidating
Diisopropylbenzene (DIPB) 0.340 kg, zinc methacrylate 0.340kg, the kg of sulphur 0.340.
A kind of method of use titanium starting sheet bound edge rubber bound edge, comprises the following steps：
Step 1: determining compacting size：
According to finished product starting sheet 880 × 880mm sizes, determine that the width-telescopic amount of bound edge rubber strip is controlled in ± 5mm, determine rubber
The thickness control of adhesive tape is in one side δ=3 ± 2mm, and width is in 20 ± 5mm；
Step 2: processing metal surface：
Remove processing oil, rust or other oxide layers；
Step 3: compressing：
By rubber system into strips, the vitellarium in the middle of titanium starting sheet is protected, in titanium starting sheet surrounding bound edge area, uniformly coating is viscous
Uniform discharge rubber strip after agent is connect, 30min is suppressed under 1.4 MPa pressure,
Exemplified by producing the above-mentioned bonding agents of 10kg, the binding agent is made up jointly of following raw material：
Isocyanates 5.170kg, silane coupler 0.470kg, chlorinated rubber 3.290kg, epoxy resin 0.470kg, titanium dioxide
Silicon 0.470kg, curing agent 0.235kg, are diluted with dimethylbenzene 30.080kg.
Step 4: post-processing：
Angle between rubber and titanium starting sheet is accomplished 30 ° by shaped article trimmer.
Sampling inspection results are as follows：
Tensile strength（Mpa）12.8Mpa, tensile elongation（%）More than 350%, permanent deformation（%）28%, hardness (shore A) 600,
Acid resistance is excellent, and electrolyte-resistant is excellent, and insulating properties is excellent, cementability strength（MPa）1.2MPa.
Embodiment 2：
Exemplified by producing 50kg titanium starting sheet bound edge rubber, a kind of titanium starting sheet bound edge rubber is made up jointly of following raw material：
Ethylene propylene diene rubber 23.100kg, CSM 6.600kg, stearic acid 0.330kg, paraffin 0.550kg, two
Glycol 0.550 kg, silica 1 3.750kg, carbon black 0.825kg, vaseline 1.650g, magnesia 0.825kg, peroxidating two
Isopropylbenzene 0.825 kg, zinc methacrylate 0.550kg, the kg of sulphur 0.550.
A kind of method of use titanium starting sheet bound edge rubber bound edge, comprises the following steps：
Step 1: determining compacting size：
According to finished product starting sheet 880 × 880mm sizes, determine that the width-telescopic amount of bound edge rubber strip is controlled in ± 5mm, determine rubber
The thickness control of adhesive tape is in one side δ=3 ± 2mm, and width is in 20 ± 5mm；
Step 2: processing metal surface：
Remove processing oil, rust or other oxide layers；
Step 3: compressing：
By rubber system into strips, the vitellarium in the middle of titanium starting sheet is protected, in titanium starting sheet surrounding bound edge area, uniformly coating is viscous
Uniform discharge rubber strip after agent is connect, 40min is suppressed under 2.3MPa pressure,
Exemplified by producing the above-mentioned bonding agents of 10kg, the binding agent is made up jointly of following raw material：
Isocyanates 3.920kg, silane coupler 0.840kg, chlorinated rubber 3.640kg, epoxy resin 0.560kg, titanium dioxide
Silicon 0.560kg, curing agent 0.560kg, are diluted with dimethylbenzene 21.000kg.
Step 4: post-processing：
Angle between rubber and titanium starting sheet is accomplished 30 ° by shaped article trimmer.
Sampling inspection results are as follows：
Sampling inspection results are as follows：
Tensile strength（Mpa）13Mpa, tensile elongation（%）More than 380%, permanent deformation（%）26%, hardness (shore A) 640, it is resistance to
Acid excellent, electrolyte-resistant is excellent, and insulating properties is excellent, cementability strength（MPa）1.4MPa.
Embodiment 3：
Exemplified by producing 50kg titanium starting sheet bound edge rubber, a kind of titanium starting sheet bound edge rubber is made up jointly of following raw material：
Ethylene propylene diene rubber 24.000kg, CSM 6.000kg, stearic acid 0.300kg, paraffin 0.600kg, two
Glycol 0.600kg, silica 1 2.900kg, carbon black 0.900kg, vaseline 1.500 kg, magnesia 0.900kg, peroxidating
Diisopropylbenzene (DIPB) 0.900 kg, zinc methacrylate 0.600kg, the kg of sulphur 0.360.
A kind of method of use titanium starting sheet bound edge rubber bound edge, comprises the following steps：
Step 1: determining compacting size：
According to finished product starting sheet 880 × 880mm sizes, determine that the width-telescopic amount of bound edge rubber strip is controlled in ± 5mm, determine rubber
The thickness control of adhesive tape is in one side δ=3 ± 2mm, and width is in 20 ± 5mm；
Step 2: processing metal surface：
Remove processing oil, rust or other oxide layers；
Step 3: compressing：
By rubber system into strips, the vitellarium in the middle of titanium starting sheet is protected, in titanium starting sheet surrounding bound edge area, uniformly coating is viscous
Connect and suppress 35min under uniform discharge rubber strip after agent, 1.5 MPa pressure,
Exemplified by producing the above-mentioned bonding agents of 10kg, the binding agent is made up jointly of following raw material：
Isocyanates 3.960kg, silane coupler 0.990kg, chlorinated rubber 3.300kg, epoxy resin 0.660g, silica
0.660kg, curing agent 0.330kg, are diluted with dimethylbenzene 23.100kg.
Step 4: post-processing：
Angle between rubber and titanium starting sheet is accomplished 30 ° by shaped article trimmer.
Sampling inspection results are as follows：
Tensile strength（Mpa）13.2Mpa, tensile elongation（%）More than 400%, permanent deformation（%）28%, hardness (shore A) 600,
Acid resistance is excellent, and electrolyte-resistant is excellent, and insulating properties is excellent, cementability strength（MPa）1.5MPa.
Claims (5)
1. a kind of titanium starting sheet bound edge rubber, it is characterised in that：The rubber is made up of the raw material of following parts by weight：Ethylene-propylene-diene monomer
76-84 parts of glue, 16-24 parts of CSM, stearic acid 0.7-1.2,1-2 parts of paraffin, 1-2 parts of diethylene glycol (DEG), titanium dioxide
43-50 parts of silicon, 1-3 parts of carbon black, 4-6 parts of vaseline, 1-3 parts of magnesia, 1-3 parts of cumyl peroxide, zinc methacrylate
1-2 parts, 1-2 parts of sulphur.
2. titanium starting sheet bound edge rubber as claimed in claim 1, it is characterised in that：The rubber by following parts by weight raw material system
Into：80 parts of ethylene propylene diene rubber, 20 parts of CSM, stearic acid 1,2 parts of paraffin, 2 parts of diethylene glycol (DEG), silica 43
Part, 3 parts of carbon black, 5 parts of vaseline, 3 parts of magnesia, 3 parts of cumyl peroxide, 2 parts of zinc methacrylate, 1.2 parts of sulphur.
3. the method for the titanium starting sheet bound edge rubber bound edge described in a kind of usage right requirement 1 or 2, it is characterised in that including following step
Suddenly：
Step 1: determining compacting size：
According to finished product starting sheet 880 × 880mm sizes, determine that the width-telescopic amount of bound edge rubber strip is controlled in ± 5mm, determine rubber
The thickness control of adhesive tape is in one side δ=3 ± 2mm, and width is in 20 ± 5mm；
Step 2: processing metal surface：
Remove processing oil, rust or other oxide layers；
Step 3: compressing：
By rubber system into strips, the vitellarium in the middle of titanium starting sheet is protected, in titanium starting sheet surrounding bound edge area, uniformly coating is viscous
Uniform discharge rubber strip after agent is connect, 30-40min is suppressed under 1.4-2.3MPa pressure；
Step 4: post-processing：
Angle between rubber and titanium starting sheet is accomplished 30 ° by shaped article trimmer.
4. as claimed in claim 3 using the method for titanium starting sheet bound edge rubber bound edge, it is characterised in that：Described in step 3
Bonding agent is made up of the raw material of following parts by weight：11-14 parts of isocyanates, 1-3 parts of silane coupler, 7-13 parts of chlorinated rubber,
1-2 parts of epoxy resin, -2 parts of silica 1,0.5-2 parts of curing agent, 64-75 parts of dimethylbenzene.
5. the method for titanium starting sheet bound edge rubber bound edge is used as described in claim 3 or 4, it is characterised in that：Described in step 3
Bonding agent be made up of the raw material of following parts by weight：12 parts of isocyanates, 3 parts of silane coupler, 10 parts of chlorinated rubber, asphalt mixtures modified by epoxy resin
2 parts of fat, 2 parts of silica, 1 part of curing agent, 70 parts of dimethylbenzene.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710434082.4A CN107216556A (en) | 2017-06-09 | 2017-06-09 | A kind of titanium starting sheet bound edge rubber and the method using the rubber bound edge |
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| CN201710434082.4A CN107216556A (en) | 2017-06-09 | 2017-06-09 | A kind of titanium starting sheet bound edge rubber and the method using the rubber bound edge |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109054191A (en) * | 2018-06-19 | 2018-12-21 | 河北春风银星胶辊股份有限公司 | A kind of packet coating compound of offset printing cleaning rubber roller |
| CN109778239A (en) * | 2019-03-20 | 2019-05-21 | 金川集团股份有限公司 | A method of without shearing nickel starting sheet kind plate and its production nickel starting sheet |
| CN109808155A (en) * | 2019-03-18 | 2019-05-28 | 陕西科力特种橡塑有限公司 | Wrapping method for the one-time formed titanium starting sheet compression molding of starting sheet |
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| CN103642447A (en) * | 2013-11-07 | 2014-03-19 | 贾梦虹 | Rubber-metal heat vulcanization type adhesive for rapidly bonding vulcanized rubber |
| CN103820819A (en) * | 2014-02-28 | 2014-05-28 | 金川集团股份有限公司 | Titanium mother board edge-binding method capable of controlling size of starting sheet |
| CN103910942A (en) * | 2013-08-05 | 2014-07-09 | 安徽欧耐橡塑工业有限公司 | Surface covering rubber of high-temperature-resistant strong-acid/alkali-resistant laminated conveyer belt and preparation method thereof |
| CN104403210A (en) * | 2014-11-19 | 2015-03-11 | 杭州顺豪橡胶工程有限公司 | Rubber material of strong acid resistant rubber roll for non-ferrous metal chemical mineral processing equipment and preparation method |
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| CN101921566A (en) * | 2009-06-12 | 2010-12-22 | 北京公科固桥技术有限公司 | Structural adhesive for steel bonding |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109054191A (en) * | 2018-06-19 | 2018-12-21 | 河北春风银星胶辊股份有限公司 | A kind of packet coating compound of offset printing cleaning rubber roller |
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| CN109808155A (en) * | 2019-03-18 | 2019-05-28 | 陕西科力特种橡塑有限公司 | Wrapping method for the one-time formed titanium starting sheet compression molding of starting sheet |
| CN109778239A (en) * | 2019-03-20 | 2019-05-21 | 金川集团股份有限公司 | A method of without shearing nickel starting sheet kind plate and its production nickel starting sheet |
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Application publication date: 20170929 |