CN105385070A - Wire and cable sheath processing technology based on nano calcium carbonate - Google Patents
Wire and cable sheath processing technology based on nano calcium carbonate Download PDFInfo
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- CN105385070A CN105385070A CN201510978901.2A CN201510978901A CN105385070A CN 105385070 A CN105385070 A CN 105385070A CN 201510978901 A CN201510978901 A CN 201510978901A CN 105385070 A CN105385070 A CN 105385070A
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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
- C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
- C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L27/04—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
- C08L27/06—Homopolymers or copolymers of vinyl chloride
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/74—Mixing; Kneading using other mixers or combinations of mixers, e.g. of dissimilar mixers ; Plant
- B29B7/7461—Combinations of dissimilar mixers
-
- 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
- B29C48/92—Measuring, controlling or regulating
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/44—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins
- H01B3/443—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins from vinylhalogenides or other halogenoethylenic compounds
-
- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92704—Temperature
-
- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92857—Extrusion unit
-
- 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
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/20—Applications use in electrical or conductive gadgets
- C08L2203/202—Applications use in electrical or conductive gadgets use in electrical wires or wirecoating
Abstract
The invention discloses a wire and cable sheath processing technology based on nano calcium carbonate. The wire and cable sheath processing technology includes the following steps of 1 performing batching, wherein by weight, 30-80 parts of polyvinyl chloride resin, 5-15 parts of glass beads, 2-8 parts of nano titanium oxide, 1-3 parts of nano calcium carbonate, 1-3 parts of a dispersing agent, 2-5 parts of a stabilizer, 1-3 parts of lubricant, 2-6 parts of plasticizer and 2-3 parts of an antioxidant are taken for use; 2 grinding the materials into slurry, wherein the raw materials in the step 1 are fully mixed, uniformly stirred and ground into the slurry, and the grinding fineness is smaller than or equal to 80 micrometers; 3 performing kneading, wherein the ground raw materials in the step 2 are kneaded for 5-10 min in a kneading machine, and the kneading temperature is controlled to be 60 DEG C-75 DEG C; 4 conducting extrusion molding, wherein extrusion molding is carried out on the kneaded raw materials in an extrusion molding machine, and extrusion molding temperature is controlled to be 155-180 DEG C; 5 conducting plasticating, wherein the temperature is controlled to be 160 DEG C-175 DEG C for plasticating to obtain finished products.
Description
Technical field
The present invention relates to electric wire working method, specifically for preparing electric wire leather material.
Background technology
Electric wire skin is widely used in cable making processes, its proof voltage and insulation resistance higher, but specific inductivity and dielectric loss are comparatively large, the generally main insulation layer being used as low pressure (≤1KV) and mesohigh (6 ~ 10KV) cable.
Main component for the Insulation Material of electric wire skin insulation layer is polyvinyl chloride (PVC), it has the advantages such as low price, the transparency is good, difficulty is fired, electrical insulating property is good and corrosion-resistant, by adding various additive and using multiple forming method to obtain different properties, broad-spectrum soft or hard product.
Especially be used widely in electric wire field.
But, the poor heat stability of polyvinyl chloride resin of the prior art, easily be heated in the course of processing autocatalysis dehydrochlorination reaction occurring to be caused by reactive site (end group etc. as chlorallylene, tertiary chlorine, tertiary hydrogen, band double bond or peroxide residues), formed and grip polyenoid chain altogether, and and then there is chain rupture, the reaction such as crosslinked and variable color, degraded, cause plastic products quality to be deteriorated, degradation, and then affect its processing and use properties.
Summary of the invention
Technical problem to be solved by this invention is, for above-mentioned deficiency of the prior art, to disclose the complete processing of the electric wire skin based on nano-calcium carbonate, and the electric wire leather material that its processing obtains possesses stable performance, aging-resistant advantage.
In order to achieve the above object, the present invention is achieved by the following technical solutions:
The complete processing of the electric wire skin based on nano-calcium carbonate disclosed by the invention, comprises following steps:
(1) prepare burden; Take the raw material of following parts by weight:
Polyvinyl chloride (PVC) RESINS 30 ~ 80 parts, glass microballon 5 ~ 15 parts, nano-titanium oxide 2 ~ 8 parts, nano-calcium carbonate 1 ~ 3 part, dispersion agent 1 ~ 3 part, stablizer 2 ~ 5 parts, lubricant 1 ~ 3 part, softening agent 2-6 part, antioxidant 2 ~ 3 parts;
(2) defibrination;
Raw material in step (1) is fully mixed, defibrination after stirring; Defibrination fineness is less than or equal to 80 μm;
(3) mediate;
Raw material after step (2) defibrination is engaged 5 ~ 10 minutes in kneader; Mediating temperature controls at 60 ~ 75 DEG C;
(4) extrusion molding;
By the raw material extrusion molding after kneading in extruding machine; Extrusion temperature controls at 155 ~ 180 DEG C;
(5) refining is moulded;
Control temperature is at 160 ~ 175 DEG C, and refining is moulded, and obtains finished product.
The preferred embodiment of the present invention and further improvement as follows:
(1) described polyvinyl chloride (PVC) RESINS is SG-1 type resin; Described antioxidant is dihydroxyphenyl propane; The size of described glass microballon is 50 ~ 100nm; The size of described nano-titanium oxide is 10 ~ 15nm; Described dispersion agent is dispersion agent NNO, and dispersion. formulation is sodium metnylene bis-naphthalene sulfonate; Described stablizer is the mixture of Zinic stearas and zinc laurate or is calcium/zinc composite stabilizer; The mass ratio of described sodium stearate and zinc laurate is 2:1; Described lubricant is one or more mixing in polyethylene wax, paraffin, clorafin; Described softening agent is one or both mixing in DEDB, the pungent fat of tri trimellitate.
(2) in described step (1) for taking the raw material of following parts by weight:
Polyvinyl chloride (PVC) RESINS 60 parts, glass microballon 10 parts, nano-titanium oxide 5 parts, nano-calcium carbonate 3 parts, dispersion agent 1 part, stablizer 5 parts, lubricant 3 parts, 5 parts, softening agent, antioxidant 2 parts; 1 ~ 2 part of UV light absorber UV-536,1 ~ 2 part of ultraviolet absorbent uv-326.
(3) extrusion process of described step (4) is completed by twin screw extruder, and the raw material after mediating is send into twin screw extruder through cooling to less than 45 DEG C; The processing temperature in each district of described twin screw extruder is respectively: 1 155 ~ 165 DEG C, district, 2 160 ~ 170 DEG C, districts, 170 ~ 180 DEG C, 3rd district, 165 ~ 175 DEG C, 4th district, head 170 ~ 180 DEG C; Extruder screw rotating speed 25-35r/min.
(4) being made up of the raw material of following weight part of described nano-calcium carbonate:
100 ~ 150 parts, calcium carbonate, sodium oleate 30 ~ 50 parts, Sodium dodecylbenzene sulfonate 0.3 ~ 0.7 part, sodium bicarbonate 1 ~ 3 part, vinylbenzene 4 ~ 8 parts, Potassium Persulphate 0.02 ~ 0.05 part, aerosil 3 ~ 5 parts, organobentonite 2 ~ 3 parts, polyisobutene 2 ~ 3 parts, 1,6 hexanediol diacrylate 0.4 ~ 0.9 part, vermiculite power 3 ~ 5 parts, deionized water.
Further: described nano-calcium carbonate is made up of following concrete steps:
S1: sodium oleate is added the aqueous solution sodium oleate that deionized water dissolving makes 1%, electric stirring 10min raised temperature to 60 DEG C, add calcium carbonate and stir 1.5 hours, stirred to leave standstill suction filtration after 4 ~ 6 hours afterwards, with deionized water wash, dry for standby at 80 DEG C in an oven;
S2: the modified calcium carbonate obtained by step S1 is added in the four-necked bottle with driven stirring rod and reflux condensing tube, adding appropriate water stirring makes modified calcium carbonate become slurries, stirring is stopped to add Sodium dodecylbenzene sulfonate and sodium bicarbonate, stir in a nitrogen atmosphere after 0.5 hour and add vinylbenzene, persulfate aqueous solution is dripped after mixture being warming up to 80 DEG C, constant temperature keeps 80 DEG C and centrifugal after 8 hours, with dry at 80 DEG C in an oven after deionized water rinsing, after to be ground into 300 ~ 400 orders for subsequent use;
S3: the methanol solution adding 3 ~ 5 times amount after organobentonite and aerosil being mixed activates 0.5 hour, 5 μm are less than grinding machine for grinding 2 ~ 3 is little again up to particle diameter, add deionized water ultrasonic disperse more even, transfer to the product adding S2 gained in flask again, raised temperature to 80 ~ 100 DEG C, the ultrasonic methyl alcohol that is back to volatilizees, and dries product;
S4: by remaining mixing of materials, stirs when being heated to 40 ~ 60 DEG C, then the product adding S3 gained is under the rotating speed of 1300 ~ 1500 revs/min, stirs 8 ~ 10min, naturally cools to room temperature, grind to form nanometer powdery after insulation 10 ~ 15min.
Beneficial effect of the present invention is:
1, the complete processing of the electric wire skin based on nano-calcium carbonate disclosed by the invention, in its raw material adopted, glass microballon, nano-titanium oxide, nano-calcium carbonate are as properties-correcting agent, hollow glass micropearl has the advantages such as light weight, high dispersive, electrical insulating property and Heat stability is good, and its hardness is large, good with the consistency of polyvinyl chloride, effectively can improve the resistance toheat of polyvinyl chloride; Nano-titanium oxide not only has anti-microbial property, also has certain ultraviolet resistance, effectively can solve the problem that polyvinyl chloride photostabilization is poor and open air is easily aging; In addition, inorganic nano-particle sub-surface has a lot of active group, such as-OH, it can be reacted with the reactive site of polyvinyl chloride by dispersion agent, the autocatalysis dehydrochlorination reaction occurring to be caused by reactive site (end group etc. as chlorallylene, tertiary chlorine, tertiary hydrogen, band double bond or peroxide residues) thus minimizing polyvinyl chloride is heated, thus improve its resistance toheat;
The present invention additionally uses antioxidant as raw stock component; By adding antioxidant (dihydroxyphenyl propane), the oxidative degradation of resin heat can be suppressed, improving oil resistance.
2, the present invention has carried out reliable defibrination and kneading process before extrusion molding, ensure that final obtained material possesses stable performance.
3, the present invention also adds 1 ~ 2 part of UV light absorber UV-536,1 ~ 2 part of ultraviolet absorbent uv-326 in a preferred embodiment in the feed; Improve the anti-uv-ray of final obtained material out of doors in environment, make dependable performance, not easily aging.
4, the present invention also in a preferred embodiment extrusion process adopt twin screw extruder complete, and mediate after raw material through cooling to less than 45 DEG C be send into twin screw extruder; The processing temperature in each district of described twin screw extruder is respectively: 1 155 ~ 165 DEG C, district, 2 160 ~ 170 DEG C, districts, 170 ~ 180 DEG C, 3rd district, 165 ~ 175 DEG C, 4th district, head 170 ~ 180 DEG C; Extruder screw rotating speed 25-35r/min.Extrusion mixes, steady quality, and adopts the different steps of the adaptive extrusion process of multiple warm area, ensure that optimum material property.
5, the present invention has also selected the nano-calcium carbonate after improving in strength property, described nano-calcium carbonate sodium oleate makes calcium carbonate surface organise as properties-correcting agent, calcium carbonate particles surface is made to have certain hydrophobicity, and double bond is introduced calcium carbonate surface, using modified calcium carbonate particle as seed, the method of letex polymerization has prepared polystyrene coated caco3 composite particles, enhance the consistency of calcium carbonate and polymkeric substance, and easily disperse, not easily reunite, physical strength is high, the present invention is also by aerosil and organobentonite activation aftertreatment modified calcium carbonate, silicon-dioxide is made to stick to the surface of calcium carbonate, not free settling, be uniformly dispersed, suspension stability is good, and further enhancing the oilness of calcium carbonate, water tolerance and high thermal resistance, calcium carbonate is had a wide range of applications in the industry, the polyisobutene added, 1, 6-hexanediyl ester and vermiculite power with the use of, enhance the acid-alkali-corrosive-resisting of calcium carbonate powders, shrinkability is little, fire-resistant, the characteristics such as insulation, add that to greatly improve cable man-hour wear-resisting as electric wire skin of the present invention, corrosion-resistant, fire-resistant, the performance of the aspects such as shrinking percentage is low, reduce the production cost of material.
Embodiment
Below in conjunction with embodiment and embodiment, the present invention is further described, and following embodiment is illustrative, is not determinate, can not limit protection scope of the present invention with following embodiment.
The complete processing of the electric wire skin based on nano-calcium carbonate disclosed by the invention, comprises following steps:
(1) prepare burden; Take the raw material of following parts by weight:
Polyvinyl chloride (PVC) RESINS 30 ~ 80 parts, glass microballon 5 ~ 15 parts, nano-titanium oxide 2 ~ 8 parts, nano-calcium carbonate 1 ~ 3 part, dispersion agent 1 ~ 3 part, stablizer 2 ~ 5 parts, lubricant 1 ~ 3 part, softening agent 2-6 part, antioxidant 2 ~ 3 parts;
(2) defibrination;
Raw material in step (1) is fully mixed, defibrination after stirring; Defibrination fineness is less than or equal to 80 μm;
(3) mediate;
Raw material after step (2) defibrination is engaged 5 ~ 10 minutes in kneader; Mediating temperature controls at 60 ~ 75 DEG C;
(4) extrusion molding;
By the raw material extrusion molding after kneading in extruding machine; Extrusion temperature controls at 155 ~ 180 DEG C;
(5) refining is moulded;
Control temperature is at 160 ~ 175 DEG C, and refining is moulded, and obtains finished product.
As a kind of preferred implementation of the present invention: described polyvinyl chloride (PVC) RESINS is SG-1 type resin; Described antioxidant is dihydroxyphenyl propane; The size of described glass microballon is 50 ~ 100nm; The size of described nano-titanium oxide is 10 ~ 15nm; Described dispersion agent is dispersion agent NNO, and dispersion. formulation is sodium metnylene bis-naphthalene sulfonate; Described stablizer is the mixture of Zinic stearas and zinc laurate or is calcium/zinc composite stabilizer; The mass ratio of described sodium stearate and zinc laurate is 2:1; Described lubricant is one or more mixing in polyethylene wax, paraffin, clorafin; Described softening agent is one or both mixing in DEDB, the pungent fat of tri trimellitate.
As a kind of preferred implementation of the present invention: for taking the raw material of following parts by weight in described step (1):
Polyvinyl chloride (PVC) RESINS 60 parts, glass microballon 10 parts, nano-titanium oxide 5 parts, nano-calcium carbonate 3 parts, dispersion agent 1 part, stablizer 5 parts, lubricant 3 parts, 5 parts, softening agent, antioxidant 2 parts; 1 ~ 2 part of UV light absorber UV-536,1 ~ 2 part of ultraviolet absorbent uv-326.
As a kind of preferred implementation of the present invention: the extrusion process of described step (4) is completed by twin screw extruder, and the raw material after mediating is send into twin screw extruder through cooling to less than 45 DEG C; The processing temperature in each district of described twin screw extruder is respectively: 1 155 ~ 165 DEG C, district, 2 160 ~ 170 DEG C, districts, 170 ~ 180 DEG C, 3rd district, 165 ~ 175 DEG C, 4th district, head 170 ~ 180 DEG C; Extruder screw rotating speed 25-35r/min.
As a kind of preferred implementation of the present invention: being made up of the raw material of following weight part of described nano-calcium carbonate:
100 ~ 150 parts, calcium carbonate, sodium oleate 30 ~ 50 parts, Sodium dodecylbenzene sulfonate 0.3 ~ 0.7 part, sodium bicarbonate 1 ~ 3 part, vinylbenzene 4 ~ 8 parts, Potassium Persulphate 0.02 ~ 0.05 part, aerosil 3 ~ 5 parts, organobentonite 2 ~ 3 parts, polyisobutene 2 ~ 3 parts, 1,6 hexanediol diacrylate 0.4 ~ 0.9 part, vermiculite power 3 ~ 5 parts, deionized water.
As a kind of preferred implementation of the present invention: described nano-calcium carbonate is made up of following concrete steps:
S1: sodium oleate is added the aqueous solution sodium oleate that deionized water dissolving makes 1%, electric stirring 10min raised temperature to 60 DEG C, add calcium carbonate and stir 1.5 hours, stirred to leave standstill suction filtration after 4 ~ 6 hours afterwards, with deionized water wash, dry for standby at 80 DEG C in an oven;
S2: the modified calcium carbonate obtained by step S1 is added in the four-necked bottle with driven stirring rod and reflux condensing tube, adding appropriate water stirring makes modified calcium carbonate become slurries, stirring is stopped to add Sodium dodecylbenzene sulfonate and sodium bicarbonate, stir in a nitrogen atmosphere after 0.5 hour and add vinylbenzene, persulfate aqueous solution is dripped after mixture being warming up to 80 DEG C, constant temperature keeps 80 DEG C and centrifugal after 8 hours, with dry at 80 DEG C in an oven after deionized water rinsing, after to be ground into 300 ~ 400 orders for subsequent use;
S3: the methanol solution adding 3 ~ 5 times amount after organobentonite and aerosil being mixed activates 0.5 hour, 5 μm are less than grinding machine for grinding 2 ~ 3 is little again up to particle diameter, add deionized water ultrasonic disperse more even, transfer to the product adding S2 gained in flask again, raised temperature to 80 ~ 100 DEG C, the ultrasonic methyl alcohol that is back to volatilizees, and dries product;
S4: by remaining mixing of materials, stirs when being heated to 40 ~ 60 DEG C, then the product adding S3 gained is under the rotating speed of 1300 ~ 1500 revs/min, stirs 8 ~ 10min, naturally cools to room temperature, grind to form nanometer powdery after insulation 10 ~ 15min.
Based on the guidance of above-mentioned embodiment, We conducted the operation of following specific embodiment, and carry out the performance test of final obtained product:
Embodiment 1
Based on the complete processing of the electric wire skin of nano-calcium carbonate, comprise following steps:
(1) prepare burden; Take the raw material of following parts by weight:
SG-1 type polyvinyl chloride (PVC) RESINS 60 parts, size is the glass microballon 10 parts of 50nm, size is the nano-titanium oxide 5 parts of 10nm, nano-calcium carbonate 3 parts, sodium metnylene bis-naphthalene sulfonate 1 part, the stablizer of Zinic stearas and zinc laurate mixture 5 parts, lubricant 3 parts, 5 parts, softening agent, 2 parts of dihydroxyphenyl propanes; 2 parts of UV light absorber UV-536,2 parts of ultraviolet absorbent uv-326s.
(2) defibrination;
Raw material in step (1) is fully mixed, defibrination after stirring; Defibrination fineness equals 65 μm;
(3) mediate;
Raw material after step (2) defibrination is engaged 10 minutes in kneader; Mediating temperature controls at 65 DEG C;
(4) extrusion molding;
By the raw material extrusion molding after kneading in extruding machine; Extrusion temperature controls at 170 DEG C;
(5) refining is moulded;
Control temperature is at 165 DEG C, and refining is moulded, and obtains finished product.
Embodiment 2
Embodiment 2 and embodiment 1 uniquely unlike, the raw material in the batching step of embodiment 2 does not have UV light absorber UV-536 and ultraviolet absorbent uv-326.
Embodiment 3
Based on the complete processing of the electric wire skin of nano-calcium carbonate, comprise following steps:
(1) prepare burden; Take the raw material of following parts by weight:
SG-1 type polyvinyl chloride (PVC) RESINS 30 parts, size is the glass microballon 15 parts of 50nm, and size is the nano-titanium oxide 8 parts of 10nm, nano-calcium carbonate 3 parts, sodium metnylene bis-naphthalene sulfonate 3 parts, stablizer 5 parts, lubricant 3 parts, 6 parts, softening agent, 3 parts of dihydroxyphenyl propanes;
(2) defibrination;
Raw material in step (1) is fully mixed, defibrination after stirring; Defibrination fineness equals 80 μm;
(3) mediate;
Raw material after step (2) defibrination is engaged 10 minutes in kneader; Mediating temperature controls at 75 DEG C;
(4) extrusion molding;
By the raw material extrusion molding after kneading in extruding machine; Extrusion temperature controls at 180 DEG C;
(5) refining is moulded;
Control temperature is at 175 DEG C, and refining is moulded, and obtains finished product.
Embodiment 4
Embodiment 4 and embodiment 3 uniquely complete in twin screw extruder unlike step (4), and the processing temperature in each district of described twin screw extruder is respectively: 1 155 ~ 165 DEG C, district, 2 160 ~ 170 DEG C, districts, 170 ~ 180 DEG C, 3rd district, 165 ~ 175 DEG C, 4th district, head 170 ~ 180 DEG C; Extruder screw rotating speed 25-35r/min.
Performance test is carried out to the obtained finished product of above-mentioned 4 embodiments of the present invention below, tests as follows:
(1) tensile strength
Test according to GB/T1040-1992, test result is as shown in table 1;
(2) elongation at break
Test according to GB/T1040-1992, test result is as shown in table 1;
(3) specific inductivity
Test according to GB/T1409-1988, test result is as shown in table 1;
(4) aging back draft intensity
Test according to GB/T1040-1992, test result is as shown in table 1;
(5) embrittlement temperature
Test according to GB/T5470-1992, test result is as shown in table 1;
(6) 200 DEG C of heat-stable times
Test according to GB/T2917.1-2002, test result is as shown in table 1;
(7) thermal distortion
Test according to GB/T8815-2002, test result is as shown in table 1;
Table 1
| Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | |
| Tensile strength/MPa | 28 | 27 | 26.9 | 27.5 |
| Elongation at break/% | 365 | 359 | 353 | 362 |
| Aging back draft intensity/MPa | 28 | 26.9 | 26.5 | 27.4 |
| Thermal distortion/% | 4 | 3.8 | 5 | 3.5 |
| Thermostability time (200 DEG C)/min | 266 | 264 | 260 | 265 |
| Specific inductivity (1MHz) | 1.2 | 1.1 | 1 | 1.1 |
| Embrittlement temperature/DEG C | -35 | -34 | -28 | -33 |
Come out from table 1, the electric wire leather material that scheme disclosed by the invention obtains possesses reliable mechanical property, and ageing resistance is superior.
Above the preferred embodiment for the present invention is explained in detail; but the invention is not restricted to above-mentioned embodiment; in the ken that those of ordinary skill in the art possess; can also make a variety of changes under the prerequisite not departing from present inventive concept; these changes relate to correlation technique well-known to those skilled in the art, and these all fall into the protection domain of patent of the present invention.
Do not depart from the spirit and scope of the present invention and can make other changes many and remodeling.
Should be appreciated that and the invention is not restricted to specific embodiment, scope of the present invention is defined by the following claims.
Claims (6)
1., based on the complete processing of the electric wire skin of nano-calcium carbonate, comprise following steps:
(1) prepare burden; Take the raw material of following parts by weight:
Polyvinyl chloride (PVC) RESINS 30 ~ 80 parts, glass microballon 5 ~ 15 parts, nano-titanium oxide 2 ~ 8 parts, nano-calcium carbonate 1 ~ 3 part, dispersion agent 1 ~ 3 part, stablizer 2 ~ 5 parts, lubricant 1 ~ 3 part, softening agent 2-6 part, antioxidant 2 ~ 3 parts;
(2) defibrination;
Raw material in step (1) is fully mixed, defibrination after stirring; Defibrination fineness is less than or equal to 80 μm;
(3) mediate;
Raw material after step (2) defibrination is engaged 5 ~ 10 minutes in kneader; Mediating temperature controls at 60 ~ 75 DEG C;
(4) extrusion molding;
By the raw material extrusion molding after kneading in extruding machine; Extrusion temperature controls at 155 ~ 180 DEG C;
(5) refining is moulded;
Control temperature is at 160 ~ 175 DEG C, and refining is moulded, and obtains finished product.
2., as claimed in claim 1 based on the complete processing of the electric wire skin of nano-calcium carbonate, it is characterized in that: described polyvinyl chloride (PVC) RESINS is SG-1 type resin; Described antioxidant is dihydroxyphenyl propane; The size of described glass microballon is 50 ~ 100nm; The size of described nano-titanium oxide is 10 ~ 15nm; Described dispersion agent is dispersion agent NNO, and dispersion. formulation is sodium metnylene bis-naphthalene sulfonate; Described stablizer is the mixture of Zinic stearas and zinc laurate or is calcium/zinc composite stabilizer; The mass ratio of described sodium stearate and zinc laurate is 2:1; Described lubricant is one or more mixing in polyethylene wax, paraffin, clorafin; Described softening agent is one or both mixing in DEDB, the pungent fat of tri trimellitate.
3., as claimed in claim 1 based on the complete processing of the electric wire skin of nano-calcium carbonate, it is characterized in that: for taking the raw material of following parts by weight in described step (1):
Polyvinyl chloride (PVC) RESINS 60 parts, glass microballon 10 parts, nano-titanium oxide 5 parts, nano-calcium carbonate 3 parts, dispersion agent 1 part, stablizer 5 parts, lubricant 3 parts, 5 parts, softening agent, antioxidant 2 parts; 1 ~ 2 part of UV light absorber UV-536,1 ~ 2 part of ultraviolet absorbent uv-326.
4. as claimed in claim 1 based on the complete processing of the electric wire skin of nano-calcium carbonate, it is characterized in that: the extrusion process of described step (4) is completed by twin screw extruder, and the raw material after mediating is send into twin screw extruder through cooling to less than 45 DEG C; The processing temperature in each district of described twin screw extruder is respectively: 1 155 ~ 165 DEG C, district, 2 160 ~ 170 DEG C, districts, 170 ~ 180 DEG C, 3rd district, 165 ~ 175 DEG C, 4th district, head 170 ~ 180 DEG C; Extruder screw rotating speed 25-35r/min.
5., as claimed in claim 1 based on the complete processing of the electric wire skin of nano-calcium carbonate, it is characterized in that: being made up of the raw material of following weight part of described nano-calcium carbonate:
100 ~ 150 parts, calcium carbonate, sodium oleate 30 ~ 50 parts, Sodium dodecylbenzene sulfonate 0.3 ~ 0.7 part, sodium bicarbonate 1 ~ 3 part, vinylbenzene 4 ~ 8 parts, Potassium Persulphate 0.02 ~ 0.05 part, aerosil 3 ~ 5 parts, organobentonite 2 ~ 3 parts, polyisobutene 2 ~ 3 parts, 1,6 hexanediol diacrylate 0.4 ~ 0.9 part, vermiculite power 3 ~ 5 parts, deionized water.
6., as claimed in claim 5 based on the complete processing of the electric wire skin of nano-calcium carbonate, it is characterized in that: described nano-calcium carbonate is made up of following concrete steps:
S1: sodium oleate is added the aqueous solution sodium oleate that deionized water dissolving makes 1%, electric stirring 10min raised temperature to 60 DEG C, add calcium carbonate and stir 1.5 hours, stirred to leave standstill suction filtration after 4 ~ 6 hours afterwards, with deionized water wash, dry for standby at 80 DEG C in an oven;
S2: the modified calcium carbonate obtained by step S1 is added in the four-necked bottle with driven stirring rod and reflux condensing tube, adding appropriate water stirring makes modified calcium carbonate become slurries, stirring is stopped to add Sodium dodecylbenzene sulfonate and sodium bicarbonate, stir in a nitrogen atmosphere after 0.5 hour and add vinylbenzene, persulfate aqueous solution is dripped after mixture being warming up to 80 DEG C, constant temperature keeps 80 DEG C and centrifugal after 8 hours, with dry at 80 DEG C in an oven after deionized water rinsing, after to be ground into 300 ~ 400 orders for subsequent use;
S3: the methanol solution adding 3 ~ 5 times amount after organobentonite and aerosil being mixed activates 0.5 hour, 5 μm are less than grinding machine for grinding 2 ~ 3 is little again up to particle diameter, add deionized water ultrasonic disperse more even, transfer to the product adding S2 gained in flask again, raised temperature to 80 ~ 100 DEG C, the ultrasonic methyl alcohol that is back to volatilizees, and dries product;
S4: by remaining mixing of materials, stirs when being heated to 40 ~ 60 DEG C, then the product adding S3 gained is under the rotating speed of 1300 ~ 1500 revs/min, stirs 8 ~ 10min, naturally cools to room temperature, grind to form nanometer powdery after insulation 10 ~ 15min.
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| CN106750729A (en) * | 2016-11-18 | 2017-05-31 | 嘉善永金金属制品有限公司 | A kind of polyethylene anti-flaming wire covering materials |
| CN108530797A (en) * | 2018-04-18 | 2018-09-14 | 江苏东立超细粉体有限公司 | A kind of CABLE MATERIALS and preparation method thereof including the special calcium powders of PVC |
| CN108641143A (en) * | 2018-05-07 | 2018-10-12 | 南昌工程学院 | A kind of composite elastic solid-state self-lubricating bearing material and its preparation process |
| CN110713678A (en) * | 2019-09-30 | 2020-01-21 | 安徽瑞琦塑胶科技有限公司 | Preparation method of high-strength pipe for double-wall corrugated pipe |
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