CN104893063A - Flame retardant LDPE masterbatch and preparation method thereof - Google Patents
Flame retardant LDPE masterbatch and preparation method thereof Download PDFInfo
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- 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
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- C08L23/04—Homopolymers or copolymers of ethene
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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
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- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/20—Compounding polymers with additives, e.g. colouring
- C08J3/22—Compounding polymers with additives, e.g. colouring using masterbatch techniques
- C08J3/226—Compounding polymers with additives, e.g. colouring using masterbatch techniques using a polymer as a carrier
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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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
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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
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- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—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
- C08J2423/04—Homopolymers or copolymers of ethene
- C08J2423/06—Polyethene
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- C—CHEMISTRY; METALLURGY
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- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- C—CHEMISTRY; METALLURGY
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- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/066—LDPE (radical process)
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Abstract
The application discloses a flame retardant LDPE masterbatch and a preparation method thereof. The preparation method comprises steps of: preparing LDPE, titanium dioxide, LLDPE, titanate, white oil, CPE, an antioxidant, aluminium hydroxide, pentabromotoluene, polyethylene wax, a flame retardant, dibasic lead phosphite, talcum powder, glutaric acid and UV-327 in parts by weight; mixing the substances; and extruding the mixture. For a product, the shore hardness is 85-88, and the impact strength is 12-18 KJ/m2; the breaking elongation is 400-600%, and the tensile strength is 10-30 MPa; and the oxygen index is 28-30%, the Vicat softening point is 128-132 DEG C, and the breakdown voltage is 20-30 kV/mm.
Description
Technical field
The application belongs to LDPE field of material preparation, particularly relates to a kind of fire-retardant LDPE masterbatch and preparation method thereof.
Background technology
Low Density Polyethylene (LDPE) is a kind of plastic material, and it is applicable to the various moulding processs of thermoplastic molding's processing, and molding processibility is good.LDPE main application makes film product, also for injection-molded item, and medical apparatus, medicine and packaging material for food, blowing slush molding goods etc.Usually, LLDPE resin density and melt index characterize.Density is determined by the concentration of comonomer in polymer chain.The concentration of comonomer determines the short-chain branch amount in polymkeric substance.The length of short-chain branch then depends on the type of comonomer.Comonomer concentration is higher, and the density of resin is lower.In addition, melt index is the reflection of resin molecular-weight average, primarily of temperature of reaction (solution method) with add chain-transfer agent (vapor phase process) and decide.Molecular-weight average and molecular weight distribution have nothing to do, and the latter mainly affects by catalyst type.Low Density Polyethylene (Low density polyethylene, be called for short LDPE) be normally monomer with ethene, under the high pressure of 98. 0 ~ 294MPa, be initiator with oxygen or organo-peroxide, through being polymerized the polymkeric substance of gained, density is 0. 910 ~ 0. 9259/cm3. medium-density polyethylene (MDPE) density is 0.926 ~ 0.9409/cm3; Very Low Density Polyethylene (VLDPE) density is at below 0.910g/cm3.
LLDPE by the industrialization of Union Carbide company, it represent the major transformation of polyethylene catalysts and Technology at 20 century 70s, and poly product scope is significantly expanded.LLDPE coordination catalyst replaces radical initiator, and replaces the higher high-pressure reactor of cost with the low-pressure vapor phase polymerization of lower cost, within the shorter time, just with the performance of its excellence and lower cost, instead of LDPE in a lot of fields.LLDPE almost penetrates into all conventional polyethylene market, comprises film, molding, tubing and electric wire.LLDPE product is nontoxic, tasteless, odorless, and be creamy white particle.There is the advantages such as intensity is high, good toughness, rigidity are strong, heat-resisting, cold-resistant compared with LDPE, also there is the performances such as good resisting environmental stress and cracking, tear-resistant intensity, and can acid-and base-resisting, organic solvent etc.2005, Chinese LLDPE output was 1,880,000 tons, accounts for 35.5% of PE ultimate production; Consumption 3,550,000 tons, accounts for 33.8% of PE aggregate consumption.Estimate in following 2 ~ 3 years, the speed of maintenance about 8% continues to increase by LLDPE consumption.According to Vehicles Collected from Market price 12000 yuan/ton calculating, the market scale of Chinese LLDPE has exceeded 40,000,000,000 yuan.Usually, LLDPE resin density and melt index characterize.Density is determined by the concentration of comonomer in polymer chain.The concentration of comonomer determines the short-chain branch amount in polymkeric substance.The length of short-chain branch then depends on the type of comonomer.Comonomer concentration is higher, and the density of resin is lower.In addition, melt index is the reflection of resin molecular-weight average, primarily of temperature of reaction (solution method) with add chain-transfer agent (vapor phase process) and decide.Molecular-weight average and molecular weight distribution have nothing to do, and the latter mainly affects by catalyst type.LLDPE by the industrialization of Union Carbide company, it represent the major transformation of polyethylene catalysts and Technology at 20 century 70s, and poly product scope is significantly expanded.LLDPE coordination catalyst replaces radical initiator, and replaces the higher high-pressure reactor of cost with the low-pressure vapor phase polymerization of lower cost, within the shorter time, just with the performance of its excellence and lower cost, instead of LDPE in a lot of fields.Current LLDPE almost penetrates into all conventional polyethylene market, comprises film, molding, tubing and electric wire.LLDPE product is nontoxic, tasteless, odorless, and be creamy white particle.There is the advantages such as intensity is high, good toughness, rigidity are strong, heat-resisting, cold-resistant compared with LDPE, also there is the performances such as good resisting environmental stress and cracking, tear-resistant intensity, and can acid-and base-resisting, organic solvent etc.2005, China LLDPE output was 1,880,000 tons, accounts for 35.5% of PE ultimate production; Consumption 3,550,000 tons, accounts for 33.8% of PE aggregate consumption.Estimate in following 2 ~ 3 years, the speed of maintenance about 8% continues to increase by LLDPE consumption.According to Vehicles Collected from Market price 12000 yuan/ton calculating, the market scale of China LLDPE has exceeded 40,000,000,000 yuan.
Polymerization process pressed by Low Density Polyethylene, can be divided into high-pressure process and low-pressure process.Autoclave method and tubular process can be divided into according to type of reactor.Take ethene as raw material, send into reactor, under the effect of initiator, carry out polyreaction with high pressure compressed, from reactor material out, after separator removes unreacted ethene, through melt extruding granulation, dry, fusion, sends to packaging.LDPE and LLDPE has fabulous rheological or melt fluidity.LLDPE has less shearing sensibility, because it has narrow molecular weight distributions and short-chain branch.In shear history (such as extrusion molding), LLDPE maintains larger viscosity, is thus difficult to processing than the LDPE of same melt index.In extrusion molding, the shearing sensibility that LLDPE is lower makes the stress relaxation of polymer molecular chain faster, and physical properties reduces the susceptibility that blow-up ratio changes thus.Linear low density of polyethylene due to higher tensile strength, preferably puncture resistant and tear resistance, mainly for the manufacture of film.Within 2005, LLDPE consumption in the world is 1,617 ten thousand tons, increases by 6.4% on a year-on-year basis.In consumption structure, film article still accounts for maximum ratio, and consumption is 1,190 ten thousand tons, accounts for 73.6% of aggregate consumption, and be secondly injection moulding, consumption is 114.8 ten thousand tons, accounts for 7.1% of LLDPE aggregate consumption.2005, Chinese LLDPE and LDPE total quantity consumed was 5,980,000 tons, and wherein LLDPE consumption is 3,550,000 tons, increases by 25.4% on a year-on-year basis, accounts for 59.4% of LLDPE/LDPE total quantity consumed; LDPE consumption is 2,430,000 tons, increases by 0.7% on year-on-year basis, accounts for 40.6% of LLDPE/LDPE total quantity consumed.From LLDPE/LDPE consumption structure, film is still the maximum kind of consumption, and consumption is 4,850,000 tons, accounts for 77.5% of LLDPE/LDPE aggregate consumption, and wherein packing film 3,130,000 tons, accounts for 50% of aggregate consumption; Plastic sheeting for farm use 134.5 ten thousand tons, accounts for 22.5% of total quantity consumed; Extra package film 37.6 ten thousand tons, accounts for 6% of total quantity consumed.Secondly be injection-molded item, consumption is 55.7 ten thousand tons, accounts for 8.9% of total quantity consumed.Thereafter be followed successively by coated products, tubing and electric wire, consumption is respectively 31.3 ten thousand tons, 18.8 ten thousand tons and 15.7 ten thousand tons, accounts for 5% of aggregate consumption, 3% and 2.5% respectively; Other consumption is 18.8 ten thousand tons, accounts for 3% of aggregate consumption.From the consumption of 2003 ~ 2005 years LLDPE/LDPE, the consumption proportion of film remains on about 77% always, and the consumption proportion of second largest kind injection-molded item is also hovered always about 9%.Estimate that, in following 2 ~ 3 years, although continuation increases by the absolute consumption of every kind, its consumption ratio regular meeting maintains current situation substantially; Demand due to packing film increases comparatively fast relatively, and the consumption proportion of plastic sheeting for farm use will be down to about 20%.Because the performance of LLDPE is constantly improved, its Application Areas also constantly expands, and the demand speedup of future market to LLDPE will be much higher than LDPE and HDPE.
Compared with normally used butene comonomer, as the LLDPE that comonomer is produced, there is more excellent performance using hexene and octene.The maximum purposes of LLDPE resin is the production of film, and the film that the LLDPE resin produced using long-chain alpha-olefin (as hexene, octene) as comonomer is made and goods are all better than the LLDPE resin produced as comonomer with butylene in tensile strength, shock strength, tear strength, paracentesis resistance, environmental stress crack resistance etc. are many.Since the nineties in 20th century, external PE production firm and with trending towards per family substituting butylene with hexene and octene.It is reported, make comonomer with octene, resin property differs to have than hervene copolymer surely and further improves, and price is more expensive on the contrary, therefore external main LLDPE manufacturer to use hexene to carry out the trend of alternative butylene more obvious.There is no scale operation hexene, octene due to domestic, and import price is more expensive, therefore, the LLDPE resin of domestic production now mainly uses butylene as comonomer.Though some enterprise domestic useful hexene when introducing LLDPE production equipment makes the trade mark of comonomer, have to abandon because of domestic production without hexene eventually, only a small amount of hexene of import when driving examination.The high-grade LLDPE of China's import mostly is this series products.Estimate will increase by a fairly big margin to the LLDPE demand being monomer with 1-hexene from now on.And popularizing along with humanity concept, and the formation of novel harmonious society, design fire-retardant LDPE masterbatch that a kind of shock strength 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 fire-retardant LDPE masterbatch and preparation method thereof, solves the technical problems such as existing LDPE shock strength, tensile strength and elongation at break are low.
technical scheme:
A kind of fire-retardant LDPE masterbatch, the raw materials by weight portion proportioning of described fire-retardant LDPE masterbatch is as follows: LDPE100 part; Titanium dioxide 5-25 part; LLDPE30-50 part; Titanic acid ester 1.5-5.5 part; White oil 1-20 part; CPE15-35 part; Oxidation inhibitor 4-16 part; Aluminium hydroxide 25-45 part; Pentabromotoluene 5-25 part; Polyethylene wax is 2-8 part; Fire retardant 40-60 part; Dibasic lead phosphite is 6-14 part; Talcum powder is 8-18 part; Pentanedioic acid 3-7 part; UV-327 is 0.1-0.5 part.
As a preferred technical solution of the present invention: the raw materials by weight portion proportioning of described fire-retardant LDPE masterbatch is as follows: LDPE100 part; Titanium dioxide 10-20 part; LLDPE35-45 part; Titanic acid ester 2.5-4.5 part; White oil 5-15 part; CPE20-30 part; Oxidation inhibitor 8-12 part; Aluminium hydroxide 30-40 part; Pentabromotoluene 10-20 part; Polyethylene wax is 3-7 part; Fire retardant 45-55 part; Dibasic lead phosphite is 8-12 part; Talcum powder is 10-16 part; Pentanedioic acid 4-6 part; UV-327 is 0.2-0.4 part.
As a preferred technical solution of the present invention: the raw materials by weight portion proportioning of described fire-retardant LDPE masterbatch is as follows: LDPE100 part; Titanium dioxide 15 parts; LLDPE40 part; Titanic acid ester 3.5 parts; White oil 10 parts; CPE25 part; 15 parts, oxidation inhibitor; 35 parts, aluminium hydroxide; Pentabromotoluene 15 parts; Polyethylene wax is 5 parts; Fire retardant 50 parts; Dibasic lead phosphite is 10 parts; Talcum powder is 15 parts; Pentanedioic acid 5 parts; UV-327 is 0.3 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 antimonous oxide or decabromodiphenyl oxide.
As a preferred technical solution of the present invention: the preparation method of described fire-retardant LDPE masterbatch, comprises the steps:
The first step: take LDPE according to parts by weight proportioning, titanium dioxide, LLDPE, titanic acid ester, white oil, CPE, oxidation inhibitor, aluminium hydroxide, pentabromotoluene, polyethylene wax, fire retardant, dibasic lead phosphite, talcum powder be, pentanedioic acid and UV-327;
Second step: LDPE, titanium dioxide, LLDPE, titanic acid ester and white oil are dropped in reactor and is heated to 50-60 DEG C, stir 5-10min, stirring velocity 200-300r/min;
3rd step: drop in kneader by the material after stirring and surplus stock, mediates 4-10min, speed 500-900r/min;
4th step: dropped in forcing machine by the material after mediating and extrude, extrudes that three sections of temperature are 160-180 DEG C, 180-210 DEG C and 210-230 DEG C, head temperature 160-180 DEG C, and screw speed is 60-80 r/min.
beneficial effect:
One of the present invention fire-retardant LDPE masterbatch and preparation method thereof adopts above technical scheme compared with prior art, has following technique effect: 1, product shore hardness 85-88, shock strength 12-18kJ/m
2; 2, elongation at break 400-600%, tensile strength 10-30MPa; 3, oxygen index 28-30%, Vicat softening point 128-132 DEG C; 4, voltage breakdown 20-30kV/mm, 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; Titanium dioxide 5 parts; LLDPE30 part; Titanic acid ester 1.5 parts; White oil 1 part; CPE15 part; Anti-oxidant DLTP 4 parts; 25 parts, aluminium hydroxide; Pentabromotoluene 5 parts; Polyethylene wax is 2 parts; Decabromodiphenyl oxide 40 parts; Dibasic lead phosphite is 6 parts; Talcum powder is 8 parts; Pentanedioic acid 3 parts; UV-327 is 0.1 part.
LDPE, titanium dioxide, LLDPE, titanic acid ester and white oil are dropped in reactor and is heated to 50 DEG C, stir 5min, stirring velocity 200r/min, the material after stirring and surplus stock are dropped in kneader, mediate 4min, speed 500r/min.
Dropped in forcing machine by material after kneading and extrude, extruding three sections of temperature is 160 DEG C, 180 DEG C and 210 DEG C, and head temperature 160 DEG C, screw speed is 60r/min.
Product shore hardness 85, shock strength 12kJ/m
2; Elongation at break 400%, tensile strength 10MPa; Oxygen index 28%, Vicat softening point 128 DEG C, voltage breakdown 20kV/mm.
embodiment 2:
LDPE100 part is taken according to parts by weight proportioning; Titanium dioxide 25 parts; LLDPE50 part; Titanic acid ester 5.5 parts; White oil 20 parts; CPE35 part; Anti-oxidant DLTP 16 parts; 45 parts, aluminium hydroxide; Pentabromotoluene 25 parts; Polyethylene wax is 8 parts; Decabromodiphenyl oxide 60 parts; Dibasic lead phosphite is 14 parts; Talcum powder is 18 parts; Pentanedioic acid 7 parts; UV-327 is 0.5 part.
LDPE, titanium dioxide, LLDPE, titanic acid ester and white oil are dropped in reactor and is heated to 60 DEG C, stir 10min, stirring velocity 300r/min, the material after stirring and surplus stock are dropped in kneader, mediate 10min, speed 900r/min.
Dropped in forcing machine by material after kneading and extrude, extruding three sections of temperature is 180 DEG C, 210 DEG C and 230 DEG C, and head temperature 180 DEG C, screw speed is 80 r/min.
Product shore hardness 86, shock strength 14kJ/m
2; Elongation at break 450%, tensile strength 15MPa; Oxygen index 28%, Vicat softening point 129 DEG C, voltage breakdown 23kV/mm.
embodiment 3:
LDPE100 part is taken according to parts by weight proportioning; Titanium dioxide 10 parts; LLDPE35 part; Titanic acid ester 2.5 parts; White oil 5 parts; CPE20 part; Antioxidant 1010 is 8 parts; 30 parts, aluminium hydroxide; Pentabromotoluene 10 parts; Polyethylene wax is 3 parts; Decabromodiphenyl oxide 45 parts; Dibasic lead phosphite is 8 parts; Talcum powder is 10 parts; Pentanedioic acid 4 parts; UV-327 is 0.2 part.
LDPE, titanium dioxide, LLDPE, titanic acid ester and white oil are dropped in reactor and is heated to 50 DEG C, stir 5min, stirring velocity 200r/min, the material after stirring and surplus stock are dropped in kneader, mediate 4min, speed 500r/min.
Dropped in forcing machine by material after kneading and extrude, extruding three sections of temperature is 165 DEG C, 190 DEG C and 215 DEG C, and head temperature 165 DEG C, screw speed is 65r/min.
Product shore hardness 86, shock strength 15kJ/m
2; Elongation at break 500%, tensile strength 20MPa; Oxygen index 29%, Vicat softening point 130 DEG C, voltage breakdown 25kV/mm.
embodiment 4:
LDPE100 part is taken according to parts by weight proportioning; Titanium dioxide 20 parts; LLDPE45 part; Titanic acid ester 4.5 parts; White oil 15 parts; CPE30 part; Antioxidant 1010 is 12 parts; 40 parts, aluminium hydroxide; Pentabromotoluene 20 parts; Polyethylene wax is 7 parts; Antimonous oxide 55 parts; Dibasic lead phosphite is 12 parts; Talcum powder is 16 parts; Pentanedioic acid 6 parts; UV-327 is 0.4 part.
LDPE, titanium dioxide, LLDPE, titanic acid ester and white oil are dropped in reactor and is heated to 60 DEG C, stir 10min, stirring velocity 280r/min, the material after stirring and surplus stock are dropped in kneader, mediate 8min, speed 800r/min.
Dropped in forcing machine by material after kneading and extrude, extruding three sections of temperature is 170 DEG C, 200 DEG C and 220 DEG C, and head temperature 170 DEG C, screw speed is 70 r/min.
Product shore hardness 87, shock strength 16kJ/m
2; Elongation at break 550%, tensile strength 25MPa; Oxygen index 29%, Vicat softening point 131 DEG C, voltage breakdown 27kV/mm.
embodiment 5:
LDPE100 part is taken according to parts by weight proportioning; Titanium dioxide 15 parts; LLDPE40 part; Titanic acid ester 3.5 parts; White oil 10 parts; CPE25 part; Antioxidant 1010 is 15 parts; 35 parts, aluminium hydroxide; Pentabromotoluene 15 parts; Polyethylene wax is 5 parts; Antimonous oxide 50 parts; Dibasic lead phosphite is 10 parts; Talcum powder is 15 parts; Pentanedioic acid 5 parts; UV-327 is 0.3 part.
LDPE, titanium dioxide, LLDPE, titanic acid ester and white oil are dropped in reactor and is heated to 55 DEG C, stir 8min, stirring velocity 250r/min, the material after stirring and surplus stock are dropped in kneader, mediate 7min, speed 700r/min.
Dropped in forcing machine by material after kneading and extrude, extruding three sections of temperature is 170 DEG C, 200 DEG C and 220 DEG C, and head temperature 170 DEG C, screw speed is 70 r/min.
Product shore hardness 88, shock strength 18kJ/m
2; Elongation at break 600%, tensile strength 30MPa; Oxygen index 30%, Vicat softening point 132 DEG C, voltage breakdown 30kV/mm.
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 fire-retardant LDPE masterbatch, is characterized in that the raw materials by weight portion proportioning of described fire-retardant LDPE masterbatch is as follows: LDPE100 part; Titanium dioxide 5-25 part; LLDPE30-50 part; Titanic acid ester 1.5-5.5 part; White oil 1-20 part; CPE15-35 part; Oxidation inhibitor 4-16 part; Aluminium hydroxide 25-45 part; Pentabromotoluene 5-25 part; Polyethylene wax is 2-8 part; Fire retardant 40-60 part; Dibasic lead phosphite is 6-14 part; Talcum powder is 8-18 part; Pentanedioic acid 3-7 part; UV-327 is 0.1-0.5 part.
2. the fire-retardant LDPE masterbatch of one according to claim 1, is characterized in that described fire-retardant LDPE masterbatch raw materials by weight portion proportioning is as follows: LDPE100 part; Titanium dioxide 10-20 part; LLDPE35-45 part; Titanic acid ester 2.5-4.5 part; White oil 5-15 part; CPE20-30 part; Oxidation inhibitor 8-12 part; Aluminium hydroxide 30-40 part; Pentabromotoluene 10-20 part; Polyethylene wax is 3-7 part; Fire retardant 45-55 part; Dibasic lead phosphite is 8-12 part; Talcum powder is 10-16 part; Pentanedioic acid 4-6 part; UV-327 is 0.2-0.4 part.
3. the fire-retardant LDPE masterbatch of one according to claim 1, is characterized in that the raw materials by weight portion proportioning of described fire-retardant LDPE masterbatch is as follows: LDPE100 part; Titanium dioxide 15 parts; LLDPE40 part; Titanic acid ester 3.5 parts; White oil 10 parts; CPE25 part; 15 parts, oxidation inhibitor; 35 parts, aluminium hydroxide; Pentabromotoluene 15 parts; Polyethylene wax is 5 parts; Fire retardant 50 parts; Dibasic lead phosphite is 10 parts; Talcum powder is 15 parts; Pentanedioic acid 5 parts; UV-327 is 0.3 part.
4. the fire-retardant LDPE masterbatch of one according to claim 1, is characterized in that: described oxidation inhibitor adopts antioxidant 1010 or anti-oxidant DLTP.
5. the fire-retardant LDPE masterbatch of one according to claim 1, is characterized in that: described fire retardant adopts antimonous oxide or decabromodiphenyl oxide.
6. a preparation method for fire-retardant LDPE masterbatch described in claim 1, is characterized in that, comprise the steps:
The first step: take LDPE according to parts by weight proportioning, titanium dioxide, LLDPE, titanic acid ester, white oil, CPE, oxidation inhibitor, aluminium hydroxide, pentabromotoluene, polyethylene wax, fire retardant, dibasic lead phosphite, talcum powder be, pentanedioic acid and UV-327;
Second step: LDPE, titanium dioxide, LLDPE, titanic acid ester and white oil are dropped in reactor and is heated to 50-60 DEG C, stir 5-10min, stirring velocity 200-300r/min;
3rd step: drop in kneader by the material after stirring and surplus stock, mediates 4-10min, speed 500-900r/min;
4th step: dropped in forcing machine by the material after mediating and extrude, extrudes that three sections of temperature are 160-180 DEG C, 180-210 DEG C and 210-230 DEG C, head temperature 160-180 DEG C, and screw speed is 60-80 r/min.
Priority Applications (1)
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| CN107955247A (en) * | 2017-11-24 | 2018-04-24 | 丁妙严 | Talc LDPE is formulated |
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