CN102863670B - Preparation method of special coating resin composition for polyethylene - Google Patents
Preparation method of special coating resin composition for polyethylene Download PDFInfo
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- CN102863670B CN102863670B CN201110191635.0A CN201110191635A CN102863670B CN 102863670 B CN102863670 B CN 102863670B CN 201110191635 A CN201110191635 A CN 201110191635A CN 102863670 B CN102863670 B CN 102863670B
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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
- B29C48/03—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
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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
- B29C48/92—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
- 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
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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
- 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
- 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
Abstract
The invention relates to a preparation method of special coating resin composition for polyethylene. The preparation method comprises the following steps of: adding a peroxide crosslinking agent accounting for 0.001-0.5% of low-density polyethylene into the low-density polyethylene, and mixing and granulating to prepare the coating resin for the polyethylene, wherein the peroxide crosslinking agent consists of alkyl peroxide, lipid peroxide, diacyl peroxide and hydroperoxide, each of which accounts for 55-85%/5-15%/5-15%/5-15% according to the percentage by weight; the extrusion temperature of an extrusion machine is 150-250 DEG C, and the rotating speed of a screw is 20-60r/min; and the MFR (Melt Flow Rate) of the low-density polyethylene is 5.0-10.0g/10min, and the density is 0.915-0.925g/cm<3>. The special coating resin composition has the characteristics of high strength, good toughness, strong adhesive force and uniform filing forming and the like and is mainly used for surface coating, paper-plastic lamination, a bonding layer and film lamination of plastic woven bags.
Description
Technical field:
The present invention relates to a kind of preparation method of polyethylene special coating resin combination, apply a level PE and there is the features such as intensity is high, good toughness, bounding force is strong, film forming is even, be mainly used in that Polywoven Bag top coat, paper are compound, bonding coat, Film laminated etc.
Background technology:
Apply level PE and obtain by under high pressure polymerization of ethene, its density is 0.915～0.925g/cm3, and in the radical polymerization of ethene, every 1000 carbon atoms have 10～35 methyl.Production technique has autoclave method and tubular process, and autoclave method technique has single hop, multistage tank reactor; It is very low that tubular process consumes monomer, and major part is made initiator with oxygen, adopts multiple spot implant operation mode.Produce the processing condition that apply level PE: pressure is 122～303MPa, and temperature is 130～350 DEG C, and polymerization time is very short, is generally 0.25～2.00min, the reaction heat of ethene gas-phase polymerization very high (being about 3.35kJ/g).The production technique of autoclave method and tubular process is substantially identical, and device is made up of 5 parts conventionally: (1) ethylene compression system, use one group of compressor with intersegmental cooler, the ethene that compression has been cleaned.(2) initiator preparation and injected system, add radical initiator (superoxide or oxygen) and chain-transfer agent, and some technique adds in compression section, the direct injecting reactor having.(3) polymerization reactor, transformation efficiency is generally 15%～30%.(4) separation system, by polymkeric substance and unreacted ethylene separation.(5) extruding pelletization system, molten polymer is extruded, granulation cooling, degassed, blending, storage, packaging.
Low Density Polyethylene (LDPE) tubular process production technique, taking ethene as raw material, pure oxygen is made initiator, and propylene is made relative molecular mass conditioning agent.The principal element that determines product performance is temperature of reaction, reaction pressure, initiator and relative molecular mass conditioning agent injection rate, and temperature of reaction control is in (310 ± 4) DEG C polymerization.Reaction pressure is larger on resin density impact, adopts propylene to make relative molecular mass conditioning agent.Because alkene is participated in reaction, generate short chain, density is reduced, therefore, in order to ensure that density is controlled at certain value.Reaction pressure should be controlled at about 275MPa.The injection rate of relative molecular mass conditioning agent propylene and initiator oxygen directly affects the melt flow rate (MFR) (MFR) of LDPE.
MFR reduces with the reduction of temperature and the rising of pressure.Under most industry operational condition, with a small amount of chain-transfer agent control MFR, allow, in industrial scale, to improve reactor pressure, keep certain relative molecular mass simultaneously.Now, long and short chain branching degree reduces, and density increases simultaneously.In radical polymerization, temperature of reaction is higher, and the transformation efficiency of product is higher.Therefore, must control temperature not too high, too highly increase chain transfer reaction, relative molecular mass is increased, MFR declines; Meanwhile, under high temperature, can produce macromole gel, make poor processability.
Density is relevant with the degree of branching, and density increases with the increase of pressure. and the raising with temperature reduces.Long chain branching degree increases with the increase of temperature, the raising of transformation efficiency, reduces with the increase of pressure, by changing dissimilar reactor and operational condition, can obtain the product of different long chain branching degree.
For applying level PE resin .MFR, density and SR have reflected the molecular structure of polymkeric substance.MFR reflects Drawing abillity, also characterizes average molecular mass simultaneously.For coating processing, requiring MFR good stability. it is that 7～8g/10min is more suitable that the coating of film, cloth, paper is selected MFR.Density is the performance of branchign of molecule, and density is lower, and toughness is better, and heat-sealing temperature is low, and goods deformation is little.SR reflects Mw/Mn, the long chain branching degree of material.SR is larger, and Mw/Mn is wider, and long chain branching degree is larger.For resin, degree of crystallinity is higher, and its mechanical property (as rigidity, hardness etc.), thermal characteristics (as fusing point, Tc, vicat softening temperature etc.) are higher.Mw/Mn is an important indicator of inspection polymkeric substance polymolecularity.When in coating processes, MFR is close, if molecular weight distribution is wide, in molecule, polymer moiety and low molecular moiety content are high.Polymer moiety content is high, and macromolecular entanglements is remarkable, easily causes mobility uneven and rupture in curtain coating process; Low molecular moiety content is high, and melt strength is low, coat film intensity difference.For ensureing curtain coating traction stresses, control MFR fluctuation range as far as possible, overcome and broaden because of the technology controlling and process resin M w/Mn causing that fluctuates.
High-speed machining performance and contracting width are to evaluate 2 important parameters that apply level PE resin.High-speed machining performance refers to the maximum linear velocity of resin in extrusion capacity one timing energy Compound Machining.Exceed the film of extruding after this value just unstable. even disconnected film.This critical line speed is larger, and High-speed machining performance is just better.After contracting width refers to that resin is extruded by T-shaped head, a kind of phenomenon that film narrows.The high speed traction property of resin and contracting width are mainly determined by melting viscoelasticity. and melting viscoelasticity can be ensured by MFR and SR.In the close situation of MFR, SR is larger, and contracting width is less. but High-speed machining poor performance.In the time of production control, should consider that SR is moderate. High-speed machining performance can be ensured like this, contracting width can be reduced again.Peculiar smell and be fuming larger on processing environment impact, the compound effect of the conference of being fuming impact printing.Peculiar smell and to be fuming be to be mainly at high temperature oxidized and to produce because of LDPE. in resin, low relative molecular mass part content is high and carbon-carbon double bond content is high. and capital makes peculiar smell and is fuming more.
Apply level PE production technique and determine product fundamental characteristics.The superoxide that exploitation is decomposed under specified temp is the emphasis that applies the research of level PE technique initiator.The key of research is the initiator that exploitation can initiated polymerization at alap temperature.So that control temperature of reaction.Set up specific molecular structure.Develop bifunctional superoxide, at higher temperature, obtaining high molecular weight polymer with higher yield is development trend from now on.
Summary of the invention:
Object of the present invention is added micro-cross-linking regulator in auxiliary agent, improves the melt strength of PP Pipe Compound, and a kind of preparation method of polyethylene special coating resin combination is provided.
The present invention adopts peroxide cross-linking agent 0.001～0.5% to add in the resin of Low Density Polyethylene, through mixing, preparation polyethylene special coating resin combination.
Peroxide cross-linking agent of the present invention comprises alkyl peroxide, lipid peroxidation, diacyl peroxide and hydroperoxide, alkyl peroxide/lipid peroxidation/diacyl peroxide/hydroperoxide are: 0～100/0～100/0～100/0～100 (weight percents), preferably 55～85/5～15/5～15/5～15, most preferably 60～75/7.5～10/7.5～15/10～15;
The MFR of Low Density Polyethylene of the present invention is 5.0～10.0g/10min, and density is 0.915～0.925g/cm
3.
Peroxide cross-linking agent add-on 0.001～0.5% of the present invention, preferably 0.03～0.3%, most preferably 0.08～0.18%.
Peroxide cross-linking agent of the present invention adopts superoxide to comprise alkyl peroxide, lipid peroxidation, diacyl peroxide and hydroperoxide; preferred alkyl superoxide, lipid peroxidation and diacyl peroxide, most preferably alkyl peroxide and diacyl peroxide.
Alkyl peroxide of the present invention is the one in ditertiary butyl peroxide, tert-butyl peroxy base isopropyl benzene or dicumyl peroxide.
Lipid peroxidation of the present invention is the one in benzoic t-butyl ester peroxide, tert-butyl hydroperoxide acetic ester.
Diacyl peroxide of the present invention is the one in dibenzoyl peroxide, two sim peroxides.
Hydroperoxide of the present invention are tertbutyl peroxide.
According to the above ratio raw material is fully mixed in mixing machine, melt extrude at twin screw extruder, extrusion temperature is 150～250 DEG C, preferably 210～240 DEG C, and most preferably 220～235 DEG C; Screw speed 20～60r/min, preferably 25～55r/min, most preferably 30～50r/min.
Preparation method's cost of the present invention is low, easily processing, netted micro-crosslinking structure that the polyethylene special coating resin combination of preparation forms, can make the melt strength of PP Pipe Compound obviously improve, contracting width reduces, and can be widely used in that Polywoven Bag top coat, paper are compound, bonding coat, Film laminated etc.
Embodiment:
In all case study on implementation, linking agent adopts peroxide cross-linking agent 0.001～0.5%, oxidation inhibitor to be used in conjunction with below, and (MFR is 5.0～10.0g/10min, and density is 0.915～0.925g/cm to add Low Density Polyethylene to as auxiliary agent
3) base resin in, after mixing granulation for apply.Analytical test the results are shown in Table 1.
Embodiment 1
Peroxide cross-linking agent by ditertiary butyl peroxide/tert-butyl hydroperoxide acetic ester/dibenzoyl peroxide/tertbutyl peroxide proportioning is: 70/10/10/10 prepares.
(MFR is 6.0g/10min, and density is 0.915g/cm to choose base resin
3, melt strength is 0.040N), the addition of peroxide cross-linking agent is 0.01%, in mixing machine, fully mixes, and melt extrudes at twin screw extruder, extrusion temperature is 215 DEG C, screw speed 30r/min.Prepare the special coated with resins of polyethylene.Analytical test the results are shown in Table 1.
Embodiment 2
Peroxide cross-linking agent by tert-butyl peroxy base isopropyl benzene/benzoic t-butyl ester peroxide/bis-sim peroxides/tertbutyl peroxide proportioning is: 45/45/5/5 prepares.
(MFR is 7.5g/10min, and density is 0.920g/cm to choose base resin
3, melt strength is 0.032N), the addition of peroxide cross-linking agent is respectively 0.1%, in mixing machine, fully mixes, and melt extrudes at twin screw extruder, and extrusion temperature is 220 DEG C, screw speed 35r/min.Prepare the special coated with resins of polyethylene.Analytical test the results are shown in Table 1.
Embodiment 3
Peroxide cross-linking agent by dicumyl peroxide/benzoic t-butyl ester peroxide/bis-sim peroxides/tertbutyl peroxide proportioning is: 5/80/5/10 prepares.
(MFR is 8.0g/10min, and density is 0.920g/cm to choose base resin
3, melt strength is 0.037N), the addition of peroxide cross-linking agent is 0.09%, in mixing machine, fully mixes, and melt extrudes at twin screw extruder, extrusion temperature is 230 DEG C, screw speed 45r/min.Prepare the special coated with resins of polyethylene.Analytical test the results are shown in Table 1.
Embodiment 4
Peroxide cross-linking agent by ditertiary butyl peroxide/tert-butyl hydroperoxide acetic ester/dibenzoyl peroxide/tertbutyl peroxide proportioning is: 10/40/40/10 prepares.
(MFR is 9.0g/10min, and density is 0.920g/cm to choose base resin
3, melt strength is 0.035N), the addition of peroxide cross-linking agent is 0.15%, in mixing machine, fully mixes, and melt extrudes at twin screw extruder, extrusion temperature is 210 DEG C, screw speed 40r/min.Prepare the special coated with resins of polyethylene.Analytical test the results are shown in Table 1.
Embodiment 5
Peroxide cross-linking agent by ditertiary butyl peroxide/tert-butyl hydroperoxide acetic ester/dibenzoyl peroxide/tertbutyl peroxide proportioning is: 5/20/60/15 prepares.
(MFR is 5.5g/10min, and density is 0.918g/cm to choose base resin
3, melt strength is 0.032N), add, addition is 0.18%, in mixing machine, fully mixes, and melt extrudes at twin screw extruder, extrusion temperature is 240 DEG C, screw speed 25r/min.Prepare the special coated with resins of polyethylene.Analytical test the results are shown in Table 1.
Embodiment 6
Peroxide cross-linking agent by ditertiary butyl peroxide/tert-butyl hydroperoxide acetic ester/bis-sim peroxides/tertbutyl peroxide proportioning is: 40/10/45/5 prepares.
(MFR is 5.0g/10min, and density is 0.923g/cm to choose base resin
3, melt strength is 0.028N), the addition of peroxide cross-linking agent is 0.12%, in mixing machine, fully mixes, and melt extrudes at twin screw extruder, extrusion temperature is 235 DEG C, screw speed 25r/min.Prepare the special coated with resins of polyethylene.Analytical test the results are shown in Table 1.
Embodiment 7
Peroxide cross-linking agent by ditertiary butyl peroxide/tert-butyl hydroperoxide acetic ester/bis-sim peroxides/tertbutyl peroxide proportioning is: 5/15/45/35 prepares.
(MFR is 7.5g/10min, and density is 0.922g/cm to choose base resin
3, melt strength is 0.042N), the addition that adds peroxide cross-linking agent is 0.16%, in mixing machine, fully mixes, and melt extrudes at twin screw extruder, extrusion temperature is 230 DEG C, screw speed 25r/min.Prepare the special coated with resins of polyethylene.Analytical test the results are shown in Table 1.
Embodiment 8
Peroxide cross-linking agent by ditertiary butyl peroxide/tert-butyl hydroperoxide acetic ester/bis-sim peroxides/tertbutyl peroxide proportioning is: 40/20/20/20 prepares.
(MFR is 8.5g/10min, and density is 0.918g/cm to choose base resin
3, melt strength is 0.040N), the addition of peroxide cross-linking agent is respectively 0.12%, in mixing machine, fully mixes, and melt extrudes at twin screw extruder, extrusion temperature is 210 DEG C, screw speed 35r/min.Prepare the special coated with resins of polyethylene.Analytical test the results are shown in Table 1.
Embodiment 9
Peroxide cross-linking agent by dicumyl peroxide/tert-butyl hydroperoxide acetic ester/dibenzoyl peroxide/tertbutyl peroxide proportioning is: 35/15/15/35 prepares.
(MFR is 9.0g/10min, and density is 0.918g/cm to choose base resin
3, melt strength is 0.015N), the addition of peroxide cross-linking agent is 0.15%, in blender, fully mixes, and melt extrudes at twin screw extruder, extrusion temperature is 235 DEG C, screw speed 35r/min.Prepare the special coated with resins of polyethylene.Analytical test the results are shown in Table 1.
Embodiment 10
Peroxide cross-linking agent by ditertiary butyl peroxide/benzoic t-butyl ester peroxide/dibenzoyl peroxide/tertbutyl peroxide proportioning is: 25/20/30/25 prepares.
(MFR is 6.5g/10min, and density is 0.925g/cm to choose base resin
3, melt strength is 0.028N), the addition of peroxide cross-linking agent is 0.27%, in blender, fully mixes, and melt extrudes at twin screw extruder, extrusion temperature is 220 DEG C, screw speed 25r/min.Prepare the special coated with resins of polyethylene.Analytical test the results are shown in Table 1.
Embodiment 11
Peroxide cross-linking agent by dicumyl peroxide/benzoic t-butyl ester peroxide/dibenzoyl peroxide/tertbutyl peroxide proportioning is: 75/10/7.5/7.5 prepares.
(MFR is 8.5g/10min, and density is 0.923g/cm to choose base resin
3, melt strength is 0.022N), the addition of peroxide cross-linking agent is 0.20%, in blender, fully mixes, and melt extrudes at twin screw extruder, extrusion temperature is 190 DEG C, screw speed 45r/min.Prepare the special coated with resins of polyethylene.Analytical test the results are shown in Table 1.
Embodiment 12
Peroxide cross-linking agent by ditertiary butyl peroxide/tert-butyl hydroperoxide acetic ester/dibenzoyl peroxide/tertbutyl peroxide proportioning is: 2.5/7.5/0/90 prepares.
(MFR is 6.0g/10min, and density is 0.917g/cm to choose base resin
3, melt strength is 0.025N), the addition of peroxide cross-linking agent is 0.06%, in mixing machine, fully mixes, and melt extrudes at twin screw extruder, extrusion temperature is 200 DEG C, screw speed 35r/min.Prepare the special coated with resins of polyethylene.Analytical test the results are shown in Table 1.
Embodiment 13
Peroxide cross-linking agent by dicumyl peroxide/tert-butyl hydroperoxide acetic ester/dibenzoyl peroxide/tertbutyl peroxide proportioning is: 85/5/7.5/2.5 prepares.
(MFR is 10.0g/10min, and density is 0.915g/cm to choose base resin
3, melt strength is 0.045N), the addition of peroxide cross-linking agent is 0.13%, in blender, fully mixes, and melt extrudes at twin screw extruder, extrusion temperature is 210 DEG C, screw speed 30r/min.Prepare the special coated with resins of polyethylene.Analytical test the results are shown in Table 1.
Embodiment 14
Peroxide cross-linking agent by ditertiary butyl peroxide/benzoic t-butyl ester peroxide/dibenzoyl peroxide/tertbutyl peroxide proportioning is: 60/15/15/10 prepares.
(MFR is 7.0g/10min, and density is 0.919g/cm to choose base resin
3, melt strength is 0.034N), the addition of peroxide cross-linking agent is respectively 0.20%, in mixing machine, fully mixes, and melt extrudes at twin screw extruder, extrusion temperature is 220 DEG C, screw speed 28r/min.Prepare the special coated with resins of polyethylene.Analytical test the results are shown in Table 1.
Embodiment 15
Peroxide cross-linking agent by tert-butyl peroxy base isopropyl benzene/tert-butyl hydroperoxide acetic ester/dibenzoyl peroxide/tertbutyl peroxide proportioning is: 80/5/5/10 prepares.
(MFR is 5.5g/10min, and density is 0.916g/cm to choose base resin
3, melt strength is 0.023N), the addition of peroxide cross-linking agent is 0.18%, in mixing machine, fully mixes, and melt extrudes at twin screw extruder, extrusion temperature is 220 DEG C, screw speed 35r/min.Prepare the special coated with resins of polyethylene.Analytical test the results are shown in Table 1.
Embodiment 16
Peroxide cross-linking agent by ditertiary butyl peroxide/tert-butyl hydroperoxide acetic ester/dibenzoyl peroxide/tertbutyl peroxide proportioning is: 2.5/2.5/45/50 prepares.
(MFR is 5.0g/10min, and density is 0.915g/cm to choose base resin
3, melt strength is 0.038N), the addition of peroxide cross-linking agent is 0.14%, in mixing machine, fully mixes, and melt extrudes at twin screw extruder, extrusion temperature is 200 DEG C, screw speed 25r/min.Prepare the special coated with resins of polyethylene.Analytical test the results are shown in Table 1.
Embodiment 17
Peroxide cross-linking agent by alkyl peroxide/tert-butyl hydroperoxide acetic ester/dibenzoyl peroxide/tertbutyl peroxide proportioning is: 4/4/2/90 prepares.
(MFR is 7.5g/10min, and density is 0.920g/cm to choose base resin
3, melt strength is 0.030N), the addition of peroxide cross-linking agent is 0.12%, in blender, fully mixes, and melt extrudes at twin screw extruder, extrusion temperature is 175 DEG C, screw speed 45r/min.Prepare the special coated with resins of polyethylene.Analytical test the results are shown in Table 1.
Can find out by embodiment in table 1 1～17, preparation method's cost of the present invention is low, easily processing, netted micro-crosslinking structure that the polyethylene special coating resin combination of preparation forms, can make the melt strength of PP Pipe Compound obviously improve, contracting width reduces, and can be widely used in that Polywoven Bag top coat, paper are compound, bonding coat, Film laminated etc.
Table 1
| Sample title | MFR(g/10min) | Melt strength (N) | Gel fraction (%) |
| Embodiment 1 | 5.5 | 0.071 | 1.2 |
| Embodiment 2 | 6.5 | 0.083 | 2.3 |
| Embodiment 3 | 7.2 | 0.092 | 3.3 |
| Embodiment 4 | 7.9 | 0.078 | 2.8 |
| Embodiment 5 | 3.7 | 0.066 | 5.2 |
| Embodiment 6 | 3.5 | 0.090 | 4.7 |
| Embodiment 7 | 6.2 | 0.098 | 5.6 |
| Embodiment 8 | 7.2 | 0.095 | 6.2 |
| Embodiment 9 | 7.4 | 0.084 | 5.9 |
| Embodiment 10 | 5.2 | 0.088 | 7.3 |
| Embodiment 11 | 7.8 | 0.078 | 6.3 |
| Embodiment 12 | 5.6 | 0.065 | 5.9 |
| Embodiment 13 | 7.2 | 0.099 | 6.4 |
| Embodiment 14 | 5.8 | 0.089 | 6.5 |
| Embodiment 15 | 4.6 | 0.071 | 6.9 |
| Embodiment 16 | 4.3 | 0.091 | 6.8 |
| Embodiment 17 | 6.8 | 0.084 | 6.0 |
Claims (1)
1. a preparation method for polyethylene special coating resin combination, is characterized in that: the peroxide cross-linking agent that accounts for Low Density Polyethylene quality 0.001～0.5% is added in Low Density Polyethylene, and mixing granulator is prepared the special coated with resins of polyethylene;
Described peroxide cross-linking agent is alkyl peroxide, peroxyester, diacyl peroxide and hydroperoxide composition, by alkyl peroxide/peroxyester/diacyl peroxide/hydroperoxide weight 100%, be respectively: 55～85/5～15/5～15/5～15;
The extrusion temperature of forcing machine is 150～250 DEG C, screw speed 20～60r/min;
The MFR of described Low Density Polyethylene is 5.0～10.0g/10min, and density is 0.915～0.925g/cm
3;
Described alkyl peroxide is the one in tert-butyl peroxy base isopropyl benzene or dicumyl peroxide;
Described peroxyester is the one in peroxidized t-butyl perbenzoate, tert-butyl hydroperoxide acetic ester;
Described diacyl peroxide is the one in dibenzoyl peroxide, two sim peroxides;
Described hydroperoxide are tertbutyl peroxide.
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| CN107805289A (en) * | 2016-09-08 | 2018-03-16 | 中国石油化工股份有限公司 | A kind of EVAc and preparation method thereof and sea-island composite fiber and preparation method thereof |
| CN111406075B (en) * | 2017-11-28 | 2024-01-19 | 诺力昂化学品国际有限公司 | Process for modifying LDPE |
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| CN101538386A (en) * | 2008-03-19 | 2009-09-23 | 中国石油天然气股份有限公司 | Agricultural polyethylene resin composition |
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| CN101538386A (en) * | 2008-03-19 | 2009-09-23 | 中国石油天然气股份有限公司 | Agricultural polyethylene resin composition |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3985060A1 (en) * | 2015-06-17 | 2022-04-20 | Dow Global Technologies Llc | Process for making crosslinked cable insulation using high melt strength ethylene-based polymer made in a tubular reactor and optionally modified with a branching agent |
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