CN104893079A - Cable jacket level heat shrinkable tube and preparation method therefor - Google Patents
Cable jacket level heat shrinkable tube and preparation method therefor Download PDFInfo
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- CN104893079A CN104893079A CN201510133551.XA CN201510133551A CN104893079A CN 104893079 A CN104893079 A CN 104893079A CN 201510133551 A CN201510133551 A CN 201510133551A CN 104893079 A CN104893079 A CN 104893079A
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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
- C08L23/04—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
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/24—Crosslinking, e.g. vulcanising, of macromolecules
- C08J3/242—Applying crosslinking or accelerating agent onto compounding ingredients such as fillers, reinforcements
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/24—Crosslinking, e.g. vulcanising, of macromolecules
- C08J3/247—Heating methods
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/04—Homopolymers or copolymers of ethene
- C08J2323/08—Copolymers of ethene
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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
- C08L2201/02—Flame or fire retardant/resistant
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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
- 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
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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
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/064—VLDPE
Abstract
The present application discloses a cable jacket heat shrinkable tube and a preparation method therefor. The method comprises steps of: preparing LDPE, vinyltrimethoxysilane, DCP, peroxidation, DBTDL, LLDPE, an antioxidant, tetraethyl thiuram disulfide, channel black, UV-9, a flame retardant, UV-327, UV-P, chlorinated paraffin and dibutyltin dilaurate in parts by weight; mixing the substances; and extruding the mixture. For a product, the tensile strength is 20-40 MPa at 20 DEG C, and the tensile strength is 10-30 MPa at 100 DEG C; the breaking elongation is 350-550% at 20 DEG C, and the breaking elongation is 500-700% at 100 DEG C; the linear expansion coefficient is 1.4-1.8x10e(-4k-1) at 20 DEG C, and the linear expansion coefficient is 2-2.5x10e(-4k-1) at 100 DEG C; and the Vicat softening point is 135-140 DEG C.
Description
Technical field
The application belongs to LDPE field of material preparation, particularly relates to a kind of cable sheath level heat-shrinkable tube and preparation method thereof.
Background technology
Heat-shrink tube is fire-retardant, insulation, heat resistance, soft flexible.Be heated (70-90 degree) can shrink; be widely used in the insulation protection of various wire harness, solder joint, inductance; metal tube, rod antirust, corrosion protection electrical material shop is on sale; the generally large shop managing electric wire electrical materials and appliances has, and is commonly used in wire joint, selects suitable heat-shrink tube; be enclosed within wire joint; with heat gun heating, heat-shrink tube shrinks, and just joint has been entangled firm.Heat-shrinkable T bush is a kind of heat shrinkable package material; namely heat shrinks, and divides pvc heat-shrinkable T bush, pet heat-shrinkable T bush, cross-linking radiation pe heat-shrinkable T bush, 10KV high-voltage busbar can be divided into protect heat-shrinkable T bush, 35KV high-voltage busbar protection heat-shrinkable T bush, containing glue double wall heat Heat-Shrinkable Tubings, imitative wood grain heat-shrinkable T bush by material.Generally be used in the exposed of electric wire etc., connect, cross section can make it to tighten by using calorifier, plays insulation, the functions such as protection.PVC heat-shrinkable T bush have heat shrink specific function, heat more than 98 DEG C namely collapsible, easy to use.Product is divided into 85 DEG C and 105 DEG C of two large series by heatproof, and specification Φ 2-Φ 200, product meets European Union RoHS environmental protection instruction.For electrolytic condenser, inductance, product resistance to elevated temperatures is good, shrink without secondary, can on behalf of printing.For monomer, the combination packaging of various rechargeable battery, and on behalf of design, print pattern, and can cut for visitor.For the outer cladding of the tubular articles such as various curtain rod, Bath-curtain rod, peg, mop rod, broomstick, tool bar, expansion link, garden instrument, strut.And can be used for bus bar copper row in low-pressure chamber, joint, the mark of wire harness, insulation outer cladding.Efficiency is high, facility investment is few, comprehensive cost is little.For lamp decoration, LED pin coated, and guitar, packaging bottleneck parcel, be a new generation wrapping material.No matter being civilian, automobile-used or military, is all upper choosing.PET heat-shrink tube (polyester heat-shrink tube) all substantially exceeds pvc heat-shrinkable T bush from thermotolerance, electrical insulation capability, mechanical property, the more important thing is that PET thermal contraction casing tube has nontoxicity, be easy to reclaim, can not produce human body and environment and poison impact, more meet environmental requirement.The environmental-protecting performance of PET heat-shrink tube, higher than European Union RoHs instruction standard, can reach Sony SS-00259 environmental protection standard.Not containing cadmium (Cd), plumbous (Pb), mercury (Hg), sexavalent chrome (CrVI), Polybrominated biphenyl (PBBs), Poly Brominated Diphenyl Ethers (PBBEs/PBDEs), polychlorobiphenyl (PCB), polychlorinated terphenyl (PCT), 1 grade of environmental management banned substance such as polychlorinated naphthalene (PCN), the electronic devices and components such as electrolytic condenser, inductance, high-grade rechargeable battery, the outer cladding of toy and medicine equipment, can meet export requirement completely.
Heat-shrinkable T bush is a kind of special polyolefine material thermal contraction casing tube, also can be called EVA material.Performance: there is high-temperature shrinkage, soft fire-retardant, insulation corrosion protection function.Be widely used in the insulation protection of various wire harness, solder joint, inductance, antirust, the corrosion protection etc. of metal tube, rod.Voltage range 600V.Macromolecular material will experience vitreous state-elastomeric state from low to high along with temperature, and during vitreous state, performance is close to plastics, and during elastomeric state, performance is close to rubber.Heat-shrink tube material therefor is at room temperature vitreous state, becomes elastomeric state after heating.Use: during production, heat-shrink tube is heated to elastomeric state, applied load makes it expand, cool fast when keeping expansion, make it enter vitreous state, this state has just been fixed.In use one heating, it will become elastomeric state again, but at this moment load without, it will bounce back.Adopt the polyolefin alloy of high-quality containing glue double wall heat Heat-Shrinkable Tubings skin, internal layer hot melt adhesive Compound Machining forms.Crosslinked through electron accelerator irradiation after formed product, continuous expansion forms.Skin has softness, low-temperature shrink, insulation, the advantage such as anticorrosion, wear-resisting, and internal layer has that low melting point, adhesive power are good, the advantage such as waterproof sealing and mechanical strain shock-absorbing capacity.Be widely used in wiring waterproof, the anti-gas-leak of electronics; the water-tight (as family's wirning harness, automotive wire bundle etc.) of multiply wire harness, the water-tight of electric wire bifurcation, the corrosionproof protection of metal pipe line; the repairing of electric wire, the occasions such as the wiring waterproof of water pump and submersible pump.Double-wall heat shrinkage casing adopts polyolefins bittern-free flame-proof material and hot melt adhesive double-layer coextrusion explained hereafter.Outer have the features such as insulation, halogen-free flameproof, low-temperature shrink for polyolefine; Internal layer is that hot melt adhesive has that low melting point, adhesive power are good, the advantage such as waterproof sealing and mechanical strain buffering.
Heat-shrinkable T bush has another name called thermal contraction protective casing, for electric wire, cable or wire terminal provide insulation protection.There is low-temperature shrink, soft fire-retardant, insulation corrosion protection etc., be widely used in antirust, the corrosion protection etc. of various wire harness, solder joint, the insulation protection of inductance and metal tube, rod.Heat-shrink tube is fire-retardant, insulation, heat resistance, heat-shrinkable T bush is a kind of special polyolefine material thermal contraction casing tube, also has and is called EVA material.It has soft flexible.Be heated (125 degree) can shrink, be widely used in the insulation protection of various wire harness, solder joint, inductance, metal tube, rod antirust, corrosion protection.Be commonly used in wire joint, select suitable heat-shrink tube, be enclosed within wire joint, with heat gun heating, heat-shrink tube shrinks, and just joint has been entangled firm.Cable thermal shrinkable casing pipe is insulation protection heat-shrinkable T bush conventional on a kind of cable, and the main material of this series products is PE, and through cross-linking radiation with add these two techniques of thermal enlargement, have thermal contraction function, contraction ratio is about 3:1, and bore is not from 50-350mm etc.Can be used as pyrocondensation inner sheath, the oversheath in cable accessory, and outer layer insulation water-proof jacket pipe.According to the normal usage of protecting pipe, protecting pipe is generally divided into protecting pipe and mesospore protecting pipe.Radiation crosslinking thermal shrinkage type protecting pipe is applied to the insulating protection of mesolow power product and the waterproof of communication product parting usually, product inwall scribbles spiral type, the high performance hot melt adhesive of straight painting, there is after contraction good sealing effectiveness, inwall not gluing and inner wall coated with glue product can be selected.
Heat-shrinkable T bush has excellent fire-retardant, insulating property; very soft flexible; shrinkage temperature is low; shrink fast, the connection of electric wire, wire end process, solder joint protection, wire harness mark, the insulation protection of resistance capacitance, metal bar or the anti-corrosion protection of tubing, the protection etc. of antenna can be widely used in.Under energetic ray effect, linear polymeric material forms three-dimensional netted crosslinking structure.Macromolecular material after crosslinked physical strength, heatproof, chemically-resistant solvent, ageing-resistant etc. in obtain and greatly improve, particularly acid-and base-resisting performance is greatly improved.And popularizing along with humanity concept, and the formation of novel harmonious society, design cable sheath level heat-shrinkable tube that a kind of Vicat softening point is high, tensile strength is high and elongation at break is high and preparation method thereof and be very important.
Summary of the invention
the technical problem solved:
The application, for above-mentioned technical problem, provides a kind of cable sheath level heat-shrinkable tube and preparation method thereof, solves the technical problems such as existing LDPE Vicat softening point, tensile strength and elongation at break are low.
technical scheme:
A kind of cable sheath level heat-shrinkable tube, the raw materials by weight portion proportioning of described cable sheath level heat-shrinkable tube is as follows: LDPE100 part; Vinyltrimethoxy silane 1.5-5.5 part; DCP0.02-0.2 part; Peroxidation diethyl propylene 0.3-0.7 part; DBTDL0.1-0.5 part; LLDPE40-60 part; Oxidation inhibitor 0.1-1 part; Tetraethylthiuram disulfide 0.2-0.8 part; Thermally oxidized black 2-8 part; UV-9 is 0.125-0.5 part; Fire retardant 2-12 part; UV-327 is 0.125-0.3 part; UV-P is 2-8 part; Clorafin 0.5-2.5 part; Dibutyl tin laurate is 0.05-0.25 part.
As a preferred technical solution of the present invention: the raw materials by weight portion proportioning of described cable sheath level heat-shrinkable tube is as follows: LDPE100 part; Vinyltrimethoxy silane 2.5-4.5 part; DCP0.05-0.15 part; Peroxidation diethyl propylene 0.4-0.6 part; DBTDL0.2-0.4 part; LLDPE45-55 part; Oxidation inhibitor 0.2-0.8 part; Tetraethylthiuram disulfide 0.3-0.7 part; Thermally oxidized black 4-6 part; UV-9 is 0.2-0.4 part; Fire retardant 4-8 part; UV-327 is 0.15-0.25 part; UV-P is 3-7 part; Clorafin 1-2 part; Dibutyl tin laurate is 0.1-0.2 part.
As a preferred technical solution of the present invention: the raw materials by weight portion proportioning of described cable sheath level heat-shrinkable tube is as follows: LDPE100 part; Vinyltrimethoxy silane 3.5 parts; DCP0.1 part; Peroxidation diethyl propylene 0.5 part; DBTDL0.3 part; LLDPE50 part; 0.5 part, oxidation inhibitor; Tetraethylthiuram disulfide 0.5 part; Thermally oxidized black 5 parts; UV-9 is 0.3 part; Fire retardant 6 parts; UV-327 is 0.15 part; UV-P is 5 parts; Clorafin 1.5 parts; Dibutyl tin laurate is 0.15 part.
As a preferred technical solution of the present invention: described oxidation inhibitor adopts antioxidant 1010 or anti-oxidant DLTP.
As a preferred technical solution of the present invention: described fire retardant adopts decabromodiphenyl oxide or antimonous oxide.
As a preferred technical solution of the present invention: the preparation method of described cable sheath level heat-shrinkable tube, comprises the steps:
The first step: take LDPE according to parts by weight proportioning, vinyltrimethoxy silane, DCP, peroxidation diethyl propylene, DBTDL, LLDPE, oxidation inhibitor, tetraethylthiuram disulfide, thermally oxidized black, UV-9, fire retardant, UV-327, UV-P be, clorafin and dibutyl tin laurate;
Second step: LDPE, vinyltrimethoxy silane, DCP, peroxidation diethyl propylene and DBTDL are dropped in reactor and is heated to 35-45 DEG C, stir 20-40min, stirring velocity 150-200r/min;
3rd step: add surplus stock, be warming up to 50-60 DEG C, stirs 30-45min, stirring velocity 200-300r/min;
4th step: water crosslinking temperature is 80-90 DEG C, crosslinking time 8-12h;
5th step: the material after crosslinked is dropped in forcing machine and extrudes, extrusion temperature 180-200 DEG C.
beneficial effect:
A kind of cable sheath level heat-shrinkable tube of the present invention and preparation method thereof adopts above technical scheme compared with prior art, has following technique effect: 1, product 20 DEG C of tensile strength 20-40MPa, 100 DEG C of tensile strength 10-30MPa; 2,20 DEG C of elongation at break 350-550%, 100 DEG C of elongation at break 500-700%; 3,20 DEG C of linear expansivity 1.4-1.8 × 10
-4k
-1, 100 DEG C of linear expansivity 2-2.5 × 10
-4k
-1; 4, Vicat softening point 135-140 DEG C, the widespread production not division of history into periods can replace current material.
Embodiment
embodiment 1:
LDPE100 part is taken according to parts by weight proportioning; Vinyltrimethoxy silane 1.5 parts; DCP0.02 part; Peroxidation diethyl propylene 0.3 part; DBTDL0.1 part; LLDPE40 part; Anti-oxidant DLTP 0.1 part; Tetraethylthiuram disulfide 0.2 part; Thermally oxidized black 2 parts; UV-9 is 0.125 part; Decabromodiphenyl oxide 2 parts; UV-327 is 0.125 part; UV-P is 2 parts; Clorafin 0.5 part; Dibutyl tin laurate is 0.05 part.
LDPE, vinyltrimethoxy silane, DCP, peroxidation diethyl propylene and DBTDL are dropped in reactor and is heated to 35 DEG C, stir 20min, stirring velocity 150r/min, add surplus stock, be warming up to 50 DEG C, stir 30min, stirring velocity 200r/min.
Water crosslinking temperature is 80 DEG C, crosslinking time 8h, is dropped in forcing machine by the material after crosslinked and extrudes, extrusion temperature 180 DEG C.
Product 20 DEG C of tensile strength 20MPa, 100 DEG C of tensile strength 10MPa; 20 DEG C of elongation at breaks, 350%, 100 DEG C of elongation at breaks 500%; 20 DEG C of linear expansivitys 1.4 × 10
-4k
-1, 100 DEG C of linear expansivitys 2 × 10
-4k
-1; Vicat softening point 135 DEG C.
embodiment 2:
LDPE100 part is taken according to parts by weight proportioning; Vinyltrimethoxy silane 5.5 parts; DCP0.2 part; Peroxidation diethyl propylene 0.7 part; DBTDL0.5 part; LLDPE60 part; Anti-oxidant DLTP 1 part; Tetraethylthiuram disulfide 0.8 part; Thermally oxidized black 8 parts; UV-9 is 0.5 part; Decabromodiphenyl oxide 12 parts; UV-327 is 0.3 part; UV-P is 8 parts; Clorafin 2.5 parts; Dibutyl tin laurate is 0.25 part.
LDPE, vinyltrimethoxy silane, DCP, peroxidation diethyl propylene and DBTDL are dropped in reactor and is heated to 45 DEG C, stir 40min, stirring velocity 200r/min, add surplus stock, be warming up to 60 DEG C, stir 45min, stirring velocity 300r/min.
Water crosslinking temperature is 90 DEG C, crosslinking time 12h, is dropped in forcing machine by the material after crosslinked and extrudes, extrusion temperature 200 DEG C.
Product 20 DEG C of tensile strength 25MPa, 100 DEG C of tensile strength 15MPa; 20 DEG C of elongation at breaks, 400%, 100 DEG C of elongation at breaks 550%; 20 DEG C of linear expansivitys 1.5 × 10
-4k
-1, 100 DEG C of linear expansivitys 2.2 × 10
-4k
-1; Vicat softening point 136 DEG C.
embodiment 3:
LDPE100 part is taken according to parts by weight proportioning; Vinyltrimethoxy silane 2.5 parts; DCP0.05 part; Peroxidation diethyl propylene 0.4 part; DBTDL0.2 part; LLDPE45 part; Antioxidant 1010 is 0.2 part; Tetraethylthiuram disulfide 0.3 part; Thermally oxidized black 4 parts; UV-9 is 0.2 part; Decabromodiphenyl oxide 4 parts; UV-327 is 0.15 part; UV-P is 3 parts; Clorafin 1 part; Dibutyl tin laurate is 0.1 part.
LDPE, vinyltrimethoxy silane, DCP, peroxidation diethyl propylene and DBTDL are dropped in reactor and is heated to 35 DEG C, stir 20min, stirring velocity 150r/min, add surplus stock, be warming up to 50 DEG C, stir 30min, stirring velocity 200r/min.
Water crosslinking temperature is 80 DEG C, crosslinking time 8h, is dropped in forcing machine by the material after crosslinked and extrudes, extrusion temperature 180 DEG C.
Product 20 DEG C of tensile strength 30MPa, 100 DEG C of tensile strength 20MPa; 20 DEG C of elongation at breaks, 450%, 100 DEG C of elongation at breaks 600%; 20 DEG C of linear expansivitys 1.6 × 10
-4k
-1, 100 DEG C of linear expansivitys 2.3 × 10
-4k
-1; Vicat softening point 137 DEG C.
embodiment 4:
LDPE100 part is taken according to parts by weight proportioning; Vinyltrimethoxy silane 4.5 parts; DCP0.15 part; Peroxidation diethyl propylene 0.6 part; DBTDL0.4 part; LLDPE55 part; Antioxidant 1010 is 0.8 part; Tetraethylthiuram disulfide 0.7 part; Thermally oxidized black 6 parts; UV-9 is 0.4 part; Antimonous oxide 8 parts; UV-327 is 0.25 part; UV-P is 7 parts; Clorafin 2 parts; Dibutyl tin laurate is 0.2 part.
LDPE, vinyltrimethoxy silane, DCP, peroxidation diethyl propylene and DBTDL are dropped in reactor and is heated to 45 DEG C, stir 40min, stirring velocity 200r/min, add surplus stock, be warming up to 60 DEG C, stir 45min, stirring velocity 300r/min.
Water crosslinking temperature is 90 DEG C, crosslinking time 12h, is dropped in forcing machine by the material after crosslinked and extrudes, extrusion temperature 200 DEG C.
Product 20 DEG C of tensile strength 35MPa, 100 DEG C of tensile strength 25MPa; 20 DEG C of elongation at breaks, 500%, 100 DEG C of elongation at breaks 650%; 20 DEG C of linear expansivitys 1.7 × 10
-4k
-1, 100 DEG C of linear expansivitys 2.4 × 10
-4k
-1; Vicat softening point 139 DEG C.
embodiment 5:
LDPE100 part is taken according to parts by weight proportioning; Vinyltrimethoxy silane 3.5 parts; DCP0.1 part; Peroxidation diethyl propylene 0.5 part; DBTDL0.3 part; LLDPE50 part; Antioxidant 1010 is 0.5 part; Tetraethylthiuram disulfide 0.5 part; Thermally oxidized black 5 parts; UV-9 is 0.3 part; Antimonous oxide 6 parts; UV-327 is 0.15 part; UV-P is 5 parts; Clorafin 1.5 parts; Dibutyl tin laurate is 0.15 part.
LDPE, vinyltrimethoxy silane, DCP, peroxidation diethyl propylene and DBTDL are dropped in reactor and is heated to 40 DEG C, stir 30min, stirring velocity 180r/min, add surplus stock, be warming up to 55 DEG C, stir 40min, stirring velocity 250r/min.
Water crosslinking temperature is 85 DEG C, crosslinking time 10h, is dropped in forcing machine by the material after crosslinked and extrudes, extrusion temperature 190 DEG C.
Product 20 DEG C of tensile strength 40MPa, 100 DEG C of tensile strength 30MPa; 20 DEG C of elongation at breaks, 550%, 100 DEG C of elongation at breaks 700%; 20 DEG C of linear expansivitys 1.8 × 10
-4k
-1, 100 DEG C of linear expansivitys 2.5 × 10
-4k
-1; Vicat softening point 140 DEG C.
Composition all components in above embodiment all can business be bought.
Above-described embodiment is just for setting forth content of the present invention, instead of restriction, and any change therefore in the implication suitable with claims of the present invention and scope, all should think to be included in the scope of claims.
Claims (6)
1. a cable sheath level heat-shrinkable tube, is characterized in that the raw materials by weight portion proportioning of described cable sheath level heat-shrinkable tube is as follows: LDPE100 part; Vinyltrimethoxy silane 1.5-5.5 part; DCP0.02-0.2 part; Peroxidation diethyl propylene 0.3-0.7 part; DBTDL0.1-0.5 part; LLDPE40-60 part; Oxidation inhibitor 0.1-1 part; Tetraethylthiuram disulfide 0.2-0.8 part; Thermally oxidized black 2-8 part; UV-9 is 0.125-0.5 part; Fire retardant 2-12 part; UV-327 is 0.125-0.3 part; UV-P is 2-8 part; Clorafin 0.5-2.5 part; Dibutyl tin laurate is 0.05-0.25 part.
2. a kind of cable sheath level heat-shrinkable tube according to claim 1, is characterized in that described cable sheath level heat-shrinkable tube raw materials by weight portion proportioning is as follows: LDPE100 part; Vinyltrimethoxy silane 2.5-4.5 part; DCP0.05-0.15 part; Peroxidation diethyl propylene 0.4-0.6 part; DBTDL0.2-0.4 part; LLDPE45-55 part; Oxidation inhibitor 0.2-0.8 part; Tetraethylthiuram disulfide 0.3-0.7 part; Thermally oxidized black 4-6 part; UV-9 is 0.2-0.4 part; Fire retardant 4-8 part; UV-327 is 0.15-0.25 part; UV-P is 3-7 part; Clorafin 1-2 part; Dibutyl tin laurate is 0.1-0.2 part.
3. a kind of cable sheath level heat-shrinkable tube according to claim 1, is characterized in that the raw materials by weight portion proportioning of described cable sheath level heat-shrinkable tube is as follows: LDPE100 part; Vinyltrimethoxy silane 3.5 parts; DCP0.1 part; Peroxidation diethyl propylene 0.5 part; DBTDL0.3 part; LLDPE50 part; 0.5 part, oxidation inhibitor; Tetraethylthiuram disulfide 0.5 part; Thermally oxidized black 5 parts; UV-9 is 0.3 part; Fire retardant 6 parts; UV-327 is 0.15 part; UV-P is 5 parts; Clorafin 1.5 parts; Dibutyl tin laurate is 0.15 part.
4. a kind of cable sheath level heat-shrinkable tube according to claim 1, is characterized in that: described oxidation inhibitor adopts antioxidant 1010 or anti-oxidant DLTP.
5. a kind of cable sheath level heat-shrinkable tube according to claim 1, is characterized in that: described fire retardant adopts decabromodiphenyl oxide or antimonous oxide.
6. a preparation method for cable sheath level heat-shrinkable tube described in claim 1, is characterized in that, comprise the steps:
The first step: take LDPE according to parts by weight proportioning, vinyltrimethoxy silane, DCP, peroxidation diethyl propylene, DBTDL, LLDPE, oxidation inhibitor, tetraethylthiuram disulfide, thermally oxidized black, UV-9, fire retardant, UV-327, UV-P be, clorafin and dibutyl tin laurate;
Second step: LDPE, vinyltrimethoxy silane, DCP, peroxidation diethyl propylene and DBTDL are dropped in reactor and is heated to 35-45 DEG C, stir 20-40min, stirring velocity 150-200r/min;
3rd step: add surplus stock, be warming up to 50-60 DEG C, stirs 30-45min, stirring velocity 200-300r/min;
4th step: water crosslinking temperature is 80-90 DEG C, crosslinking time 8-12h;
5th step: the material after crosslinked is dropped in forcing machine and extrudes, extrusion temperature 180-200 DEG C.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510133551.XA CN104893079A (en) | 2015-03-26 | 2015-03-26 | Cable jacket level heat shrinkable tube and preparation method therefor |
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| CN201510133551.XA CN104893079A (en) | 2015-03-26 | 2015-03-26 | Cable jacket level heat shrinkable tube and preparation method therefor |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106197167A (en) * | 2016-08-22 | 2016-12-07 | 中国工程物理研究院化工材料研究所 | Explosive protection pretension protective layer and the method for explosive protection thereof |
| CN111725772A (en) * | 2020-07-05 | 2020-09-29 | 陈利 | Anti-oxidation cable |
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| CN111725772A (en) * | 2020-07-05 | 2020-09-29 | 陈利 | Anti-oxidation cable |
| CN115926282A (en) * | 2021-08-20 | 2023-04-07 | 浙江脉通智造科技(集团)有限公司 | Polyolefin composite material, preparation method thereof, heat shrinkable tube and medical instrument |
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