CN103709492A - Physical foaming polyolefin elastomer cable material and preparation method thereof - Google Patents

Physical foaming polyolefin elastomer cable material and preparation method thereof Download PDF

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Publication number
CN103709492A
CN103709492A CN201310613839.8A CN201310613839A CN103709492A CN 103709492 A CN103709492 A CN 103709492A CN 201310613839 A CN201310613839 A CN 201310613839A CN 103709492 A CN103709492 A CN 103709492A
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Prior art keywords
parts
polyolefin elastomer
ethylene
carrying
elastomer cable
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Inventor
汪全伟
董文博
汪全信
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TIANJIN POLYTECH POLYMER TECHNOLOGY Co Ltd
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TIANJIN POLYTECH POLYMER TECHNOLOGY Co Ltd
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Priority to CN201310613839.8A priority Critical patent/CN103709492A/en
Publication of CN103709492A publication Critical patent/CN103709492A/en
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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
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/919—Thermal treatment of the stream of extruded material, e.g. cooling using a bath, e.g. extruding into an open bath to coagulate or cool the material
    • 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
    • C08L23/04—Homopolymers or copolymers of ethene
    • C08L23/08—Copolymers of ethene
    • C08L23/0807—Copolymers of ethene with unsaturated hydrocarbons only containing more than three carbon atoms
    • C08L23/0815—Copolymers of ethene with aliphatic 1-olefins
    • 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
    • B29C48/04—Particle-shaped
    • 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
    • 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
    • B29C48/50—Details of extruders
    • B29C48/505—Screws
    • B29C48/625—Screws characterised by the ratio of the threaded length of the screw to its outside diameter [L/D ratio]
    • 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
    • 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
    • H01B3/441—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 alkenes
    • 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
    • B29C2948/9258—Velocity
    • 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
    • B29C2948/9258—Velocity
    • B29C2948/9259—Angular velocity
    • 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
    • B29C2948/92695—Viscosity; Melt flow index [MFI]; Molecular weight
    • 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
    • B29C2948/92504—Controlled parameter
    • B29C2948/92761—Mechanical properties
    • 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
    • B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
    • B29C2948/92885—Screw or gear
    • 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
    • B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
    • B29C2948/92895—Barrel or housing
    • 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
    • C08K2201/002—Physical properties
    • C08K2201/003—Additives being defined by their diameter
    • 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
    • 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
    • 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

Abstract

The invention discloses a physical foaming polyolefin elastomer cable material and a preparation method thereof. The physical foaming polyolefin elastomer cable material mainly comprises, by weight, 50-60 parts of an ethylene-octylene copolymer resin, 30-40 parts of a ethylene-butylene copolymer resin, 5-10 parts of polyethylene wax, 2-3 parts of expansion microspheres and 0.1 parts a rheological agent. The preparation method comprises the following steps of weighing raw materials according to a weight part ratio, putting the raw materials into a mixer, carrying out mixing to obtain a uniform mixture, feeding the mixture into a double-screw extruder, carrying out blending extrusion, carrying out filtration and drawing, carrying out cooling in a water tank, carrying out drying, carrying out grain-sized dicing by a grain-sized dicing machine, and carrying out packaging to obtain a finished product. Through extrusion foaming at a temperature of 180-200 DEG C, the physical foaming polyolefin elastomer cable material produces uniform foam which is soft and has good elasticity and small density. The physical foaming polyolefin elastomer cable material can be widely used for sea floor exploration, scientific investigation, sea floor rescue and underwater robot zero-buoyancy cable light lining salvage. The preparation method has a reasonable design and can be operated simply.

Description

Physical blowing polyolefin elastomer CABLE MATERIALS and preparation method thereof
Technical field
The present invention relates to a kind of for being widely used in physical blowing polyolefin elastomer CABLE MATERIALS of sea floor exploration, scientific investigation, ocean rescue, salvaging underwater robot zero-buoyancy cable lightweight lining and preparation method thereof, particularly a kind of physical blowing polyolefin elastomer CABLE MATERIALS and preparation method thereof.
Background technology
In recent years, along with the long-term of land resources continues exploitation and peter out, people turn to the wide ocean with hydrocarbon rich and Mineral resources sight gradually, and especially there are abundant hydrocarbon resources and metallic mineral resources in the seabed of 1000 meters to 6000 meters.Marine oil and gas and mineral resources exploration technology are greatly developed; as the supporting use with zero-buoyancy electric wire that electric power, data video signal transmission are provided for various exploring equipments, become one of requisite technology; tradition electric wire is due to the use of metallic conductor and metal protection protector; cause density excessive and heavy; can not meet the arbitrarily floating and mobile requirement of zero-buoyancy cable, therefore develop the lightweight close with seawater with use density, softness movably physical blowing polyolefin elastomer cable become inevitable choice.
Physical blowing polyolefin elastomer CABLE MATERIALS technological difficulties are mainly: 1. flexibility.Zero-buoyancy cable generally will reach 6000 meters to ocean the most deeply with exploring equipment dive, and can move arbitrarily, and except cable conductor and outer jacket employing soft material, requiring cable mainly to foam lining must be soft flexible.Tradition foam material is hard as polyethylene foamed, expanded polypropylene, can not be crooked; 2. lightweight.Conventional chemical foaming material is because density own is large, and foam degrees is low, and after foaming, density is 0.7～0.9 g/cm 3, not reaching zero-buoyancy requirement, cable can sink to seabed, mobile difficulty; 3. prilling temperature is low.Due to can the initial blowing temperature of foaming and intumescing microballoon low, be only 135 ℃, must strictly control twin-screw extrusion temperature and speed and reduce melt viscosity, prevent that temperature from surpassing 135 ℃ and causing CABLE MATERIALS to foam in advance.
Summary of the invention
It is low that main purpose of the present invention is to overcome the foam degrees that traditional foam material itself exists, density is large, hardness is large, the shortcoming such as not flexible, and provide a kind of physical blowing polyolefin elastomer CABLE MATERIALS and preparation method thereof, it adopts ethylene-octene copolymer resin is basic raw material, by adding ethylene-butene copolymer resin, improve materials processing performance, add polyethylene wax and reduce viscosity, add expandable microspheres, after heating, can significantly expand and form even independent enclosed cavity, thereby reduction density of material, add the surface that rheological agent improves material, the use range of material is extensive, a kind of physical blowing polyolefin elastomer CABLE MATERIALS and preparation method thereof is provided, and after extrusion foaming, density reaches 0.5 to 0.6g/cm 3, adjust and to extrude that to make whole cable density after thickness be 1.0g/cm 3left and right, close with seawater, can meet floating requirement.Its preparation method is reasonable in design, easy and simple to handle.
The object of the invention is to be realized by following technical scheme.
Physical blowing polyolefin elastomer CABLE MATERIALS of the present invention is characterized in that, its major ingredient and parts by weight are: 50 to 60 parts of ethylene-octene copolymer resins, 30 to 40 parts of ethylene-butene copolymer resins, 5 to 10 parts of polyethylene waxs, 2 to 3 parts of expandable microspheres, 0.1 part of rheological agent.
Aforesaid physical blowing polyolefin elastomer CABLE MATERIALS, wherein, described ethylene-octene copolymer resin is that octene content is 35 to 40%, and molten finger is 0.5 to 2.0/10min, and density is 0.87g/cm 3, the resin that shore hardness is 75A; Described ethylene-butene copolymer resin refers to be 15 to 30g/10min for melting, and density is 0.885g/cm 3, the ethylene-butene copolymer resin that shore hardness is 86A; Described polyethylene wax is that molecular weight is 2000 to 3000, and fusing point is the low-molecular polyethylene wax of 105 to 110 ℃; Described expandable microspheres is 28 to 40 microns of particle diameters, and initial expansion temperature is the not expandable microspheres dry powder of 135 to 150 ℃; Described rheological agent is for being tetrafluoroethylene-vinylidene fluoride-hexafluoropropylene copolymer.
The preparation method of physical blowing polyolefin elastomer CABLE MATERIALS of the present invention; it is characterized in that; described raw material is mixed according to input mixing machine after parts by weight prepare metering separately; then in twin screw extruder blend, filter, extrude, tie rod; cooling through tank again, by gas blower, be dried, then through dicing machine, be cut into particle; finally packing, obtains finished product.
The preparation method of described physical blowing polyolefin elastomer CABLE MATERIALS, is characterized in that, the mixing time of described mixing machine is 5 to 10 minutes; Described forcing machine is that diameter is the twin screw extruder of 50mm, and its extrusion temperature is 100 to 130 ℃, and extruded velocity is 200 to 300 revs/min; The temperature of described cooling rear packing is below 50 ℃.
The beneficial effect of physical blowing polyolefin elastomer CABLE MATERIALS of the present invention and preparation method thereof, it adopts, and hardness is lower, the good ethylene-octene copolymer resin of elasticity is basic raw material; By molten, refer to that larger ethylene-butene copolymer resin can improve materials processing performance; Add low-molecular polyethylene wax and can improve expended microsphere dispersing property, reduce melt viscosity, prevent that CABLE MATERIALS from foaming in advance; Add expandable microspheres, utilize the rear inflatable several times of its heating, form the density that enclosed cavity reduces material; Add rheological agent and can improve the flow rate of material, thereby improve the surface of material, make the range of application of material more extensive; Moreover its preparation method is reasonable in design, easy and simple to handle.
Accompanying drawing explanation
Fig. 1 is workflow diagram of the present invention.
Embodiment
Physical blowing polyolefin elastomer CABLE MATERIALS of the present invention, its major ingredient and parts by weight are: 50 to 60 parts of ethylene-octene copolymer resins, 30 to 40 parts of ethylene-butene copolymer resins, 5 to 10 parts of polyethylene waxs, 2 to 3 parts of expandable microspheres, 0.1 part of rheological agent.
Physical blowing polyolefin elastomer CABLE MATERIALS of the present invention, wherein, described physical blowing polyolefin elastomer CABLE MATERIALS, wherein, described ethylene-octene copolymer resin is that octene content is 35 to 40%, and molten finger is 0.5 to 2.0/10min, and density is 0.87g/cm 3, the resin that shore hardness is 75A; Described ethylene-butene copolymer resin refers to be 15 to 30g/10min for melting, and density is 0.885g/cm 3, the resin that shore hardness is 86A; Described polyethylene wax is that molecular weight is 2000 to 3000, and fusing point is the low-molecular polyethylene wax of 105 to 110 ℃; Described expandable microspheres is 28 to 40 microns of particle diameters, and initial expansion temperature is the not expandable microspheres dry powder of 135 to 150 ℃; Described rheological agent is for being tetrafluoroethylene-vinylidene fluoride-hexafluoropropylene copolymer.
The preparation method of physical blowing polyolefin elastomer CABLE MATERIALS of the present invention; it is characterized in that; described raw material is mixed according to input mixing machine after parts by weight prepare metering separately; then in twin screw extruder blend, filter, extrude, tie rod; cooling through tank again, by gas blower, be dried, then through dicing machine, be cut into particle; finally packing, obtains finished product.
The preparation method of physical blowing polyolefin elastomer CABLE MATERIALS of the present invention, wherein, the mixing time of described mixing machine is 5 to 10 minutes; Described forcing machine is that diameter is the twin screw extruder of 50mm, and its extrusion temperature is 100 to 130 ℃, and extruded velocity is 200 to 300 revs/min; The temperature of described cooling rear packing is below 50 ℃.
Embodiment:
Embodiment 1 and embodiment 2 prepare according to each composition weight umber shown in table 1:
Table 1 is each composition weight umber table of the embodiment of the present invention
Figure BDA0000423254640000041
The preparation of embodiment 1:
Raw material described in table 1 is prepared to rear input mixing machine according to parts by weight separately to be mixed; its mixing time is 5 to 10 minutes, then send into diameter and be 50mm twin screw extruder blend, filter, extrude tie rod, its extrusion temperature is 100 ℃ to 130 ℃; extruded velocity is 300 revs/min; then pass through cooling trough cooling, by gas blower, be dried, then enter dicing machine and be cut into particle; finally be cooled to below 50 ℃; pack, obtain finished product, as shown in Figure 1.
The preparation of embodiment 2:
Raw material described in table 1 is prepared to rear input mixing machine according to parts by weight separately to be mixed; its mixing time is 5 to 10 minutes; then send into diameter and be 50mm twin screw extruder blend, filter, extrude tie rod, its extrusion temperature is 100 ℃ to 130 ℃, extruded velocity is 200 revs/min; then pass through cooling trough cooling; by gas blower, be dried, then enter dicing machine and be cut into particle, be finally cooled to below 50 ℃; pack, obtain finished product.
The embodiment of the present invention is prepared as follows shown in table 2:
Table 2 is prepared the main performance requirements of physical blowing polyolefin elastomer CABLE MATERIALS for the embodiment of the present invention
Sequence number Test subject Unit Requirement Test method
1 Density after foaming g/cm 3 ≤60 GB/T6343
2 Hardness after foaming, Shao Shi A ≤75 GB/T2411
3 Foaming back draft intensity MPa ≥15 GB/T1040
4 Elongation at break after foaming ％ ≥300 GB/1040
The physical blowing polyolefin elastomer CABLE MATERIALS that adopts the embodiment of the present invention to obtain is extruded strip foaming sample at 180 ℃～200 ℃ temperature, and test performance is as shown in table 3:
The performance table that table 3 is the physical blowing polyolefin elastomer CABLE MATERIALS that adopts the embodiment of the present invention and obtain
Sequence number Test subject Unit Example 1 data Example 2 data
1 Density after foaming g/cm3 0.58 0.51
2 Hardness after foaming, Shao Shi A 72 70
3 Foaming back draft intensity MPa 20 18
4 Elongation at break after foaming ％ 780 650
As can be seen from Table 3, the standard-required that the physical blowing polyolefin elastomer CABLE MATERIALS performance that prepared by the embodiment of the present invention meets completely.
The embodiment of the present invention is that the content describing is prior art, therefore no longer repeat.
The above, it is only preferred embodiment of the present invention, not the present invention is done to any pro forma restriction, any simple modification, equivalent variations and modification that every foundation technical spirit of the present invention is done above embodiment, all still belong in the scope of technical solution of the present invention.

Claims (4)

1. a physical blowing polyolefin elastomer CABLE MATERIALS, is characterized in that, its major ingredient and parts by weight are: 50 to 60 parts of ethylene-octene copolymer resins, 30 to 40 parts of ethylene-butene copolymer resins, 5 to 10 parts of polyethylene waxs, 2 to 3 parts of expandable microspheres, 0.1 part of rheological agent.
2. physical blowing polyolefin elastomer CABLE MATERIALS according to claim 1, is characterized in that, described ethylene-octene copolymer resin is that octene content is 35 to 40%, and molten finger is 0.5 to 2.0/10min, and density is 0.87g/cm 3, the resin that shore hardness is 75A;
Described ethylene-butene copolymer resin resin refers to be 15～30g/10min for melting, and density is 0.885g/cm 3shore hardness is the ethylene-butene copolymer resin of 86A;
Described polyethylene wax is that molecular weight is 2000 to 3000, and fusing point is the low-molecular polyethylene wax of 105 to 110 ℃;
Described expandable microspheres is 28 to 40 microns of particle diameters, and initial expansion temperature is the not expandable microspheres dry powder of 135 to 150 ℃;
Described rheological agent is for being tetrafluoroethylene-vinylidene fluoride-hexafluoropropylene copolymer.
3. the preparation method of a physical blowing polyolefin elastomer CABLE MATERIALS as claimed in claim 1; it is characterized in that; described raw material is mixed according to input mixing machine after parts by weight prepare metering separately; then blend in twin screw extruder, extrude, filtration, tie rod; cooling through tank again, by gas blower, be dried, enter dicing machine and be cut into particle; finally packing, obtains finished product.
4. the preparation method of physical blowing polyolefin elastomer CABLE MATERIALS according to claim 3, is characterized in that, the mixing time of described mixing machine is 5 to 10 minutes; Described forcing machine is that diameter is the twin screw extruder of 50mm, and its extrusion temperature is 100 to 130 ℃, and extruded velocity is 200 to 300 revs/min; After dry, the temperature of packing is below 50 ℃.
CN201310613839.8A 2013-11-27 2013-11-27 Physical foaming polyolefin elastomer cable material and preparation method thereof Pending CN103709492A (en)

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Cited By (1)

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Publication number Priority date Publication date Assignee Title
WO2021000227A1 (en) * 2019-07-01 2021-01-07 Dow Global Technologies Llc Expanded low-density polyethylene insulation composition

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WO2021000227A1 (en) * 2019-07-01 2021-01-07 Dow Global Technologies Llc Expanded low-density polyethylene insulation composition

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