CN106317271A - PE shrink film material and preparation method thereof - Google Patents
PE shrink film material and preparation method thereof Download PDFInfo
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Abstract
The invention relates to a PE shrink film material and a preparation method thereof. The PE shrink film material is prepared from the following raw materials in parts by weight: 90.0-100.0 parts of high-branching-degree low-density polyethylene base resin; 0-10.0 parts of metallocene linear low-density polyethylene base resin; 0.05-0.10 part of an antioxidant; and 0.07-0.12 part of an anti-blocking agent. The PE shrink film prepared by the materials has relatively high level and smooth degree and tear strength, high rate of crystallization in the process of machining, high shrinkage rate, and relatively wide shape memory recovery temperature.
Description
Technical field
The invention belongs to plastic sheeting field, be specifically related to a kind of high well-pressed degree PE shrink film material and
Preparation method.
Background technology
It is good that PE heat shrink films product has pliability, and impact resistance, tear resistance are strong, not cracky, receipts
Shrinkage is big, the transparency is good, go for variously-shaped commodity packaging, moisture resistance, dust tightness are excellent
Etc. feature；It is widely used in the one integral piece collection of drinks, pop can class, mineral water class and pharmaceutical in recent years
Close packaging, its technique and equipment is simple, packing cost is low, manner of packing is various, enjoy businessman and consumption
The favor of person.
At home, there are gantry, Beijing and the field limited public affairs of width food in the producer of large-scale use thermal shrinking package machine
Department, Shanghai Fang Lian packaging material company limited and Zhejiang Prov Zhongcheng Coating Materials Co., Ltd etc..At present
Existing nearly 20 of only plastics package committee of Chinese packaging community of domestic shrinkable film producer, yield connects
Nearly 80,000 tons, whole market consumes PP Pipe Compound more than 200,000 tons/year.According in scholarly forecast 5 years from now on,
Domestic heat-shrinkable film market by with more than 20% speed increment, in great demand to PP Pipe Compound.
Heat-shrinkable film is to utilize thin film vertical or horizontal energy storage stretched under high resiliency state to exist
In thin film, utilize the memory effect that the form before bi-directionally or uni-directionally stretching is had that thermoplastic has
Should, the function that can recover the form before stretching when heat again reaches the purpose of packaging.
In production, extrusion-blown modling or extrusion the tape casting is generally used to produce thick film, then at softening temperature
Above, vertical and horizontal stretching is carried out, greatly during use at a temperature of an elastomeric state below melt temperature
Rely on contractility that packaged commodity bundle is tied during in draft temperature or close to draft temperature.
Owing to product requires that in the course of processing crystalline rate is high, during use, require again stronger impact resistance
With anti-push-and-pull, molecular weight and molecular structure to raw produce require strict, domestic high-strength for producing
The PP Pipe Compound trade mark of degree shrink film is less, and majority is difficult to be used alone.Produce and be applied at present
The trade mark have the LD163 of Yanshan Petrochemical, the 2100TN00 of Qilu Petrochemical and the S030 of oil of SPC
Deng；The product of import has LDPE (Low Density Polyethylene) trade mark 400 of U.S.'s Dow Plastics Company
With 402, the 322F etc. of FB3003 and Basell of Qatar's petrochemical industry.The wherein LD163 of Yanshan Petrochemical
Exploitation relative maturity, but owing to melt flow rate (MFR) is low, viscosity is big, and granulating system easily fluctuates, the most easily-controllable
System, current production rate is the most little.Other products there is also various cause for quality, and a lot of users select several material
Blend and use, bring inconvenience to production process.Although and import material steady quality, but often occurring disconnected
Goods, it is impossible to supply steadily in the long term, and see according to current market situation, it is completely dependent on import material far away
Manufacturer production demand cannot be met.
Summary of the invention
It is an object of the invention to provide a kind of PE shrink film material and preparation method thereof, existing to overcome
The deficiency that in technology, shrink film tensile resistance is poor, shrinkage factor is low.
The object of the present invention is achieved like this, and a kind of PE shrink film material, including following weight portion
Raw material is made:
Highly-branched degree low-density polyethylene plinth resin 90.0～100.0；
Metallocene linear-low density polyethylene base resin 0～10.0；
Antioxidant 0.05～0.10；
Opening agent 0.07～0.12.
Wherein, highly-branched degree low-density polyethylene plinth resin is prepared by the following method: by raw material
Ethylene, initiator and molecular weight regulator are by weight 100:0.26:0.1, and injecting reactor, in reaction
Temperature is 160～350 DEG C, under conditions of reaction pressure is 230～280MPa, prepares melt flows speed
Rate is 0.25～0.35g/10min, density is 0.922～0.926kg/m3With the degree of branching for being more than or equal to
The highly-branched degree ldpe resin of 11 side chain/1000C.
Wherein, metallocene linear-low density polyethylene base resin melt flow rate (MFR) be 0.8～
1.2g/10min, density is 0.916～0.920kg/m3。
Wherein, initiator is peroxide, is preferably by the peroxidating pivalic acid tert-butyl ester, peroxidating 2-
Ethylhexanate, the peroxidating 3,5,5 Trimethylhexanoic acid tert-butyl ester, two (1,1-dimethyl ethyl) peroxide
In compound, the peroxidating 2 ethyl hexanoic acid tert-butyl ester and the formed group of peroxidized t-butyl perbenzoate two
Kind and more than.
Wherein, molecular weight regulator is propionic aldehyde, 1-butylene or propylene.
Wherein, antioxidant is phenolic antioxidant, preferably four [β-(3,5-di-tert-butyl-hydroxy phenyls)
Propanoic acid] pentaerythritol ester or β-(3,5-di-tert-butyl-hydroxy phenyl) propanoic acid positive octadecanol ester, mainly make
With for improving the processing stability of material and long-acting thermal oxidative aging.
Wherein, opening agent is kieselguhr.
Present invention also offers the preparation method of a kind of PE shrink film material, comprise the following steps: by upper
State metering ratio, by highly-branched degree low-density polyethylene plinth resin, metallocene linear-low density polyethylene base
After plinth resin, antioxidant and opening agent mixing, add comminutor extrusion granule to cooling down in water, it is thus achieved that
Granular polyethylene shrink film material.
Wherein, comminutor uses draw ratio to be the extruder of 30:1, has 7 sections of heating cylinder, each section
Melt temperature is controlled as 170,175,185,195,200,200,200 DEG C, and regulates granule
The temperature of cooling water is 40～45 DEG C.
Beneficial effects of the present invention:
According to PE shrink film material that the present invention provides and preparation method thereof, obtained shrink film has
High well-pressed degree, high elongation at tear, highly shrinkable, and good, the puncture-resistant of the transparency；In preparation process
In, shrink film crystalline rate is fast, shape memory recovery temperature wide ranges, and pelletize is easy, and supply is stable,
And this preparation method technique is simple, low cost.
Detailed description of the invention
Hereinafter embodiments of the invention are elaborated: the present embodiment is being front with technical solution of the present invention
Put and implement, give detailed embodiment and process, but protection scope of the present invention is not limited to
Following embodiment, the experimental technique of unreceipted actual conditions in the following example, generally according to conventional strip
Part.
The present invention provides a kind of PE shrink film material, and the raw material including following weight portion is made:
Highly-branched degree low-density polyethylene plinth resin 90.0～100.0；
Metallocene linear-low density polyethylene base resin 0～10.0；
Antioxidant 0.05～0.10；
Opening agent 0.07～0.12.
Wherein, highly-branched degree low-density polyethylene plinth resin provides the basic serviceability of material, makes thin
Film has superior stiffness, the transparency and shrinkage；Metallocene linear-low density polyethylene basic tree
Fat can improve thin film strength and pliability, if additional proportion is too high, will affect thin film in the course of processing
Stability, easily cause film bubble unstable, so that the uneven thickness of film, mechanical properties decrease；Antioxidant can
Avoid that plastic is the most aging, turn yellow, affect outward appearance and mechanical property, when extending use
Between；Opening agent is for reducing the electrostatic between thin film, it is simple to opening uses.Antioxidant and opening agent addition
Too much, in use there will be auxiliary agent transport phenomena, impact processing and use.
Highly-branched degree low-density polyethylene plinth resin:
In the present invention, highly-branched degree low-density polyethylene plinth resin melt flowing speed be usually 0.25～
0.35g/10min, density is usually 0.922～0.926kg/m3, the degree of branching will be generally greater than or equal to 11
Side chain/1000C.If flow rate is higher than 0.35g/10min, then the film-strength formed reduces, well-pressed degree
Low, shrinkage factor reduces, if less than 0.25g/10min, then should not process, brilliant point and bar easily occurs in thin film
Stricture of vagina, transparency reduces；If density is higher than 0.926kg/m3, then film clarity reduces, if being less than
0.922kg/m3, then film crystal unity is relatively low, and hot strength reduces；If the degree of branching is less than 11 side chains
/ 1000C, then the contraction elasticity of thin film reduces, and is difficult to pack tightly.
In the present invention, there is no limit especially to preparing highly-branched degree low-density polyethylene plinth resin initiator
Fixed, generally can be enumerated as the peroxidating pivalic acid tert-butyl ester, the peroxidating 2 ethyl hexanoic acid tert-butyl ester, peroxide
Change the 3,5,5 Trimethylhexanoic acid tert-butyl ester, two (1,1-dimethyl ethyl) peroxide, peroxidating 2-ethyl hexyl
In tert-butyl acrylate and the formed group of peroxidized t-butyl perbenzoate two kinds and more than.
In the present invention, there is no preparing highly-branched degree low-density polyethylene plinth resin molecular weight regulator
It is particularly limited to, generally can be enumerated as propionic aldehyde, 1-butylene or propylene.
Metallocene linear-low density polyethylene base resin:
In the present invention, metallocene linear-low density polyethylene base resin is not particularly limited, generally flows
Dynamic speed is 0.8～1.2g/10min, and density is 0.916～0.920kg/m3。
Below according to specific embodiment, technical solution of the present invention is further described.
The ethylene raw specification used in embodiment is:
| Project | Composition |
| Ethylene | 99.95% (mol) min |
| Total sulfur is (with H2S counts) | 1ppm(wt)max |
| Carbon monoxide | 2ppm max |
| Carbon dioxide | 4ppm max |
| Acetylene | 5ppm max |
| Oxygen | 3ppm max |
| Hydrogen | 5ppm max |
| Methanol+water | 5+5ppm max |
| C3+ | 10ppm max |
| C3-、C4-、C5-Add up to | 10ppm max |
| Methane+ethane | 500ppm max |
The molecular weight regulator propionic aldehyde used in embodiment, its specification is as follows:
| Project | Composition |
| Propionic aldehyde | 99.5% (wt) min |
| Water | 0.2% (wt) max |
| Acid | 2mg KOH/g max |
| Colourity | 15(APHA)max |
The molecular weight regulator 1-butylene used in embodiment, its specification is as follows:
| Project | Composition |
| Butene-1 | 99.4% (wt) min |
| Water | 40ppm(wt)max |
| Acetylene | 1ppm max |
| Sulfur | 5ppm(wt)max |
| Carbon dioxide | 5ppm(vol)max |
The molecular weight regulator propylene used in embodiment, its specification is as follows:
| Project | Composition |
| Propylene | 99.4% (wt) min |
| Methane+propane | 0.6(wt)max |
| Water | 40ppm(wt)max |
| Acetylene | 1ppm max |
| Sulfur | 5ppm(wt)max |
| Carbon dioxide | 5ppm(vol)max |
The initiator used in embodiment is peroxide, and its specification is as follows:
Antioxidant four [β-(3,5-di-tert-butyl-hydroxy phenyl) propanoic acid] tetramethylolmethane used in embodiment
Ester, its specification is:
Antioxidant β-(3,5-di-tert-butyl-hydroxy phenyl) the positive octadecanol of propanoic acid used in embodiment
Ester, its specification is:
Embodiment 1
Prepare highly-branched degree low-density polyethylene plinth resin:
By feed ethylene 25 ton hour, peroxide initiator 65L/ hour and molecular weight regulator propionic aldehyde
28kg/ hour by metering injecting reactor, be 280 ± 5 DEG C in reaction temperature, reaction pressure is 245 ±
Under conditions of 5MPa, prepared melt flow rate (MFR) is 0.3g/10min and density is 0.924kg/m3,
Change degree is the highly-branched degree ldpe resin of 19 side chain/1000C.Wherein, peroxide draws
Send out agent and use the peroxidating pivalic acid tert-butyl ester, peroxidating-3,5,5-trimethylhexanoate and peroxide
The mixture of change-2-ethylhexanoate.
Prepare polyethylene shrink membrane material and polyethylene shrink film:
By low close to highly-branched degree low-density polyethylene plinth resin 95 weight portion, the metallocene linear of preparation
Degree polyethylene base resin 5 weight portion, antioxidant four [β-(3,5-di-tert-butyl-hydroxy phenyl) propanoic acid]
After pentaerythritol ester 0.05 weight portion and the mixing of opening agent kieselguhr 0.07 weight portion, add in comminutor
Extrusion granule is to cooling down in water, it is thus achieved that high well-pressed degree PE shrink film material granule.Extruder uses major diameter
Than the extruding granulator for 30:1, each section of melt temperature control is
170/175/185/195/200/200/200 (DEG C), and regulate granule cooling water temperature be 45 ± 5 DEG C.
Preparing shrink film with the polyethylene shrink membrane material of preparation at blown film unit, the performance test to film divides
Analysis, prepares thickness 0.06mm.
Embodiment 2
Prepare highly-branched degree low-density polyethylene plinth resin:
By feed ethylene 25.5 ton hour, peroxide initiator 68L/ hour and molecular weight regulator third
Aldehyde is 295 ± 5 DEG C by metering injecting reactor in reaction temperature in 30kg/ hour, and reaction pressure is 265
Under conditions of ± 5MPa, prepared melt flow rate (MFR) is 0.28g/10min and density is 0.926kg/m3,
The degree of branching is the highly-branched degree ldpe resin of 13 side chain/1000C.Wherein, peroxide
Use the peroxidating pivalic acid tert-butyl ester, peroxidating-3,5,5-trimethylhexanoate and peroxidating-2-
Ethylhexoate and the mixture of di-tert-butyl peroxide.
Prepare polyethylene shrink membrane material and polyethylene shrink film:
By low close to highly-branched degree low-density polyethylene plinth resin 92 weight portion, the metallocene linear of preparation
Degree polyethylene base resin 8 weight portion, antioxidant four [β-(3,5-di-tert-butyl-hydroxy phenyl) propanoic acid]
After pentaerythritol ester 0.075 weight portion and the mixing of opening agent kieselguhr 0.085 weight portion, add comminutor
Extrusion granule is to cooling down in water, it is thus achieved that high well-pressed degree PE shrink film material granule.Extruder uses major diameter
Than the extruding granulator for 30:1, each section of melt temperature control is
170/180/190/195/205/205/205 (DEG C), and regulate granule cooling water temperature be 40 ± 5 DEG C.
Preparing shrink film with the polyethylene shrink membrane material of preparation at blown film unit, the performance test to film divides
Analysis, prepares thickness 0.06mm.
Embodiment 3
Prepare highly-branched degree low-density polyethylene plinth resin:
By feed ethylene 26 ton hour, peroxide initiator 70L/ hour and molecular weight regulator propionic aldehyde
34kg/ hour by metering injecting reactor, be 290 ± 5 DEG C in reaction temperature, reaction pressure is 250 ±
Under conditions of 5MPa, prepared melt flow rate (MFR) is 0.35g/10min and density is 0.922kg/m3,
Change degree is the highly-branched degree ldpe resin of 17 side chain/1000C.Wherein, peroxide is adopted
By the peroxidating pivalic acid tert-butyl ester, peroxidating-3,5,5-trimethylhexanoate and peroxidating-2-second
Base alkyl caproate and the mixture of di-tert-butyl peroxide.
Prepare polyethylene shrink membrane material and polyethylene shrink film:
By low close to highly-branched degree low-density polyethylene plinth resin 94 weight portion, the metallocene linear of preparation
Degree polyethylene base resin 6 weight portion, antioxidant four [β-(3,5-di-tert-butyl-hydroxy phenyl) propanoic acid]
After pentaerythritol ester 0.065 weight portion and the mixing of opening agent kieselguhr 0.085 weight portion, add comminutor
Extrusion granule is to cooling down in water, it is thus achieved that high well-pressed degree PE shrink film material granule.Extruder uses major diameter
Than the extruding granulator for 30:1, each section of melt temperature control is
170/175/190/195/202/202/202 (DEG C), and regulate granule cooling water temperature be 40 ± 5 DEG C.
Preparing shrink film with the polyethylene shrink membrane material of preparation at blown film unit, the performance test to film divides
Analysis, prepares thickness 0.06mm.
Embodiment 4
Prepare highly-branched degree low-density polyethylene plinth resin:
By feed ethylene 24 ton hour, peroxide initiator 62L/ hour and molecular weight regulator propionic aldehyde
26kg/ hour by metering injecting reactor, be 300 ± 5 DEG C in reaction temperature, reaction pressure is 255 ±
Under conditions of 5MPa, prepared melt flow rate (MFR) is 0.25～0.35g/10min and density is
0.924kg/m3, the degree of branching is the highly-branched degree ldpe resin of 14 side chain/1000C.Its
In, peroxide uses the peroxidating pivalic acid tert-butyl ester, peroxidating-3,5, the 5-tertiary fourths of tri-methyl hexanoic acid
Ester and peroxidating-2-ethylhexanoate and the mixture of di-tert-butyl peroxide.
Prepare polyethylene shrink membrane material and polyethylene shrink film:
By low close to highly-branched degree low-density polyethylene plinth resin 96 weight portion, the metallocene linear of preparation
Degree polyethylene base resin 4 weight portion, antioxidant four [β-(3,5-di-tert-butyl-hydroxy phenyl) propanoic acid]
After pentaerythritol ester 0.055 weight portion and the mixing of opening agent kieselguhr 0.075 weight portion, add comminutor
Extrusion granule is to cooling down in water, it is thus achieved that high well-pressed degree PE shrink film material granule.Extruder uses major diameter
Than the extruding granulator for 30:1, each section of melt temperature control is
170/180/190/195/200/200/200 (DEG C), and regulate granule cooling water temperature be 40 ± 5 DEG C.
Preparing shrink film with the polyethylene shrink membrane material of preparation at blown film unit, the performance test to film divides
Analysis, prepares thickness 0.06mm.
Embodiment 5
Prepare highly-branched degree low-density polyethylene plinth resin:
By feed ethylene 24 ton hour, peroxide initiator 62L/ hour and molecular weight regulator 1-fourth
Alkene is 280 ± 5 DEG C by metering injecting reactor in reaction temperature in 1600kg/ hour, and reaction pressure is
Under conditions of 245 ± 5MPa, prepared melt flow rate (MFR) is 0.35g/10min and density is
0.922kg/m3, the degree of branching is the highly-branched degree ldpe resin of 16 side chain/1000C.Its
In, peroxide uses the peroxidating pivalic acid tert-butyl ester, peroxidating 3,5, the tertiary fourth of 5-tri-methyl hexanoic acid
Ester and the mixture of di-tert-butyl peroxide.
Prepare polyethylene shrink membrane material and polyethylene shrink film:
By low close to highly-branched degree low-density polyethylene plinth resin 100 weight portion, the metallocene linear of preparation
Degree polyethylene base resin 10 weight portion, antioxidant β-(3,5-di-tert-butyl-hydroxy phenyl) propanoic acid positive ten
After eight carbon alcohol ester 0.10 weight portions and the mixing of opening agent kieselguhr 0.12 weight portion, add comminutor extrusion
Granule is to cooling down in water, it is thus achieved that high well-pressed degree PE shrink film material granule.Extruder employing draw ratio is
The extruding granulator of 30:1, each section of melt temperature controls to be 170/180/190/195/200/200/200
(DEG C), and regulate granule cooling water temperature be 40 ± 5 DEG C.
Preparing shrink film with the polyethylene shrink membrane material of preparation at blown film unit, the performance test to film divides
Analysis, prepares thickness 0.06mm.
Embodiment 6
Prepare highly-branched degree low-density polyethylene plinth resin:
By feed ethylene 24 ton hour, peroxide initiator 62L/ hour and molecular weight regulator propylene
Within 2000kg/ hour, pressing metering injecting reactor, be 160～315 DEG C in reaction temperature, reaction pressure is
Under conditions of 240 ± 5MPa, prepared melt flow rate (MFR) is 0.3g/10min and density is
0.922kg/m3, the degree of branching is the highly-branched degree ldpe resin of 15 side chain/1000C.Its
In, peroxide uses the peroxidating pivalic acid tert-butyl ester, peroxidating-3,5, the 5-tertiary fourths of tri-methyl hexanoic acid
Ester and the mixture of di-tert-butyl peroxide.
Prepare polyethylene shrink membrane material and polyethylene shrink film:
By highly-branched degree low-density polyethylene plinth resin 100 weight portion, the antioxidant β-(3,5-bis-of preparation
Tert-butyl-hydroxy phenyl) propanoic acid positive octadecanol ester 0.05 weight portion and opening agent kieselguhr 0.065 weight
After amount part mixing, add in comminutor extrusion granule extremely cooling water, it is thus achieved that high well-pressed degree PE shrink film material
Material granule.Extruder uses draw ratio to be the extruding granulator of 30:1, and each section of melt temperature control is
170/180/190/195/200/200/200 (DEG C), and regulate granule cooling water temperature be 40 ± 5 DEG C.
Preparing shrink film with the polyethylene shrink membrane material of preparation at blown film unit, the performance test to film divides
Analysis, prepares thickness 0.06mm.
Comparative example 1
Operate according to step in patent CN1312319A embodiment 1, by poly-for branched low density second
Alkene, linear low density polyethylene, acrylic resin and inorganic filler calcium carbonate are with weight portion as 1:30:
9；The ratio mixing of 60, after extruding pelletization, forms thin film with the blown extrusion machine of circular die, carries out
Performance evaluation.
Comparative example 2
Operate according to step in patent CN1312319A embodiment 2, by poly-for branched low density second
Alkene, linear low density polyethylene, acrylic resin and inorganic filler calcium carbonate are with weight portion as 6:24:
10；The ratio mixing of 60, after extruding pelletization, forms thin film with the blown extrusion machine of circular die, enters
Row performance evaluation.
Film raw material composition in table 1 embodiment and comparative example
| LDPE | LLDPE | PP | Antioxidant | Opening agent | Inorganic filler | |
| Embodiment 1 | 95 | 5 | 0.050 | 0.070 | ||
| Embodiment 2 | 92 | 8 | 0.075 | 0.085 | ||
| Embodiment 3 | 94 | 6 | 0.065 | 0.080 | ||
| Embodiment 4 | 96 | 4 | 0.055 | 0.075 | ||
| Embodiment 5 | 98 | 2 | 0.060 | 0.080 | ||
| Embodiment 6 | 100 | 0 | 0.050 | 0.065 | ||
| Comparative example 1 | 1 | 30 | 9 | 60 | ||
| Comparative example 2 | 6 | 24 | 10 | 60 |
Note: LDPE is highly-branched degree low-density polyethylene plinth resin；LLDPE is that metallocene linear is low close
Degree polyethylene base resin；PP is polypropylene.
Table 2 film performance
Note: percentage elongation=tension failure norminal strain
Being analyzed understanding to the data of table 1 and table 2, in comparative example, a large amount of inorganic fillers filled change
The material property of resin, by usual method pelletize then difficult forming, is difficult to pelletize.Prepared thin film
Thin film phase specific strength and the tensile property prepared with embodiment drastically reduce, and the transparency is poor, and haze value is high,
Filler is prone to separate out, and the filler separated out easily is present in film surface, is unsuitable for for packing, especially
It is the field that the shrink film such as medicated beer, beverage is conventional.And thin film prepared by the embodiment of the present invention, stretching is strong
Degree height, the transparency is good, and haze value is low, has the various characteristics needed for packaging shrink film.
Beneficial effects of the present invention:
According to PE shrink film material that the present invention provides and preparation method thereof, obtained shrink film has
High well-pressed degree, high elongation at tear, highly shrinkable, and good, the puncture-resistant of the transparency；In preparation process
In, shrink film crystalline rate is fast, shape memory recovery temperature wide ranges, and pelletize is easy, and supply is stable,
And this preparation method technique is simple, low cost.
Certainly, the present invention also can have other various embodiments, spiritual and essence without departing substantially from the present invention
In the case of, those of ordinary skill in the art can make various corresponding change and deformation according to the present invention,
But these change accordingly and deform the protection domain that all should belong to the claims in the present invention.
Claims (11)
1. a PE shrink film material, it is characterised in that include that the raw material of following weight portion is made:
Highly-branched degree low-density polyethylene plinth resin 90.0～100.0；
Metallocene linear-low density polyethylene base resin 0～10.0；
Antioxidant 0.05～0.10；
Opening agent 0.07～0.12.
PE shrink film material the most according to claim 1, it is characterised in that described highly-branched
Degree low-density polyethylene plinth resin be prepared by the following method: by feed ethylene, initiator and point
Son amount regulator by weight 100:0.26:0.1, injecting reactor, reaction temperature be 160～
350 DEG C, under conditions of reaction pressure is 230～280MPa, prepared melt flow rate (MFR) be 0.25～
0.35g/10min, density are 0.922～0.926kg/m3It is more than or equal to 11 side chains with the degree of branching
The highly-branched degree ldpe resin of/1000C.
PE shrink film material the most according to claim 1, it is characterised in that described metallocene
Linear low density polyethylene base resin melt flow rate (MFR) is 0.8～1.2g/10min, and density is
0.916～0.920kg/m3。
PE shrink film material the most according to claim 2, it is characterised in that described initiator
For peroxide.
PE shrink film material the most according to claim 4, it is characterised in that described initiator
It is by the peroxidating pivalic acid tert-butyl ester, the peroxidating 2 ethyl hexanoic acid tert-butyl ester, peroxidating 3,5,5-trimethyl
Hecanoic acid t-butyl ester, two (1,1-dimethyl ethyl) peroxide, the peroxidating 2 ethyl hexanoic acid tert-butyl ester and mistake
In the formed group of Oxybenzene t-butyl formate two kinds and more than.
PE shrink film material the most according to claim 2, it is characterised in that described molecule
Amount regulator is propionic aldehyde, 1-butylene or propylene.
PE shrink film material the most according to claim 1, it is characterised in that described antioxygen
Agent is phenolic antioxidant.
PE shrink film material the most according to claim 7, it is characterised in that described phenols resists
Oxygen agent be four [β-(3,5-di-tert-butyl-hydroxy phenyl) propanoic acid] pentaerythritol esters or β-(3,5-di-t-butyl-
4-hydroxy phenyl) propanoic acid positive octadecanol ester.
PE shrink film material the most according to claim 1, it is characterised in that described opening
Agent is kieselguhr.
10. the preparation method of the PE shrink film material according to any one of claim 1 to 9, it is special
Levy and be, comprise the following steps: by above-mentioned metering ratio, by highly-branched degree low-density polyethylene plinth tree
After fat, metallocene linear-low density polyethylene base resin, antioxidant and opening agent mixing, add pelletize
Machine extrusion granule is to cooling down in water, it is thus achieved that particulate polyethylene shrink film material.
The preparation method of 11. PE shrink film materials according to claim 10, its feature exists
In, comminutor uses draw ratio to be the extruder of 30:1, has 7 sections of heating cylinder, each section of melt temperature
Degree is controlled as 170,175,185,195,200,200,200 DEG C, and regulates granule cooling water
Temperature be 40～45 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510346986.2A CN106317271B (en) | 2015-06-19 | 2015-06-19 | A kind of PE shrinks membrane material and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510346986.2A CN106317271B (en) | 2015-06-19 | 2015-06-19 | A kind of PE shrinks membrane material and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106317271A true CN106317271A (en) | 2017-01-11 |
| CN106317271B CN106317271B (en) | 2019-02-15 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107498965A (en) * | 2017-07-07 | 2017-12-22 | 河间市精诚塑业有限公司 | A kind of super-thin low-voltage thermoplastic film and its preparation technology |
| CN111073102A (en) * | 2019-12-13 | 2020-04-28 | 宁波市付枫塑业有限公司 | Low-temperature high-permeability toughened PE shrink film material and preparation method thereof |
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| CN102574946A (en) * | 2009-08-10 | 2012-07-11 | 陶氏环球技术有限责任公司 | LDPE for use as a blend component in shrinkage film applications |
| CN103772797A (en) * | 2012-10-20 | 2014-05-07 | 中国石油化工股份有限公司 | Highly-transparent polyethylene composition and preparation method thereof |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102574946A (en) * | 2009-08-10 | 2012-07-11 | 陶氏环球技术有限责任公司 | LDPE for use as a blend component in shrinkage film applications |
| CN103772797A (en) * | 2012-10-20 | 2014-05-07 | 中国石油化工股份有限公司 | Highly-transparent polyethylene composition and preparation method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107498965A (en) * | 2017-07-07 | 2017-12-22 | 河间市精诚塑业有限公司 | A kind of super-thin low-voltage thermoplastic film and its preparation technology |
| CN107498965B (en) * | 2017-07-07 | 2019-03-12 | 河间市精诚塑业有限公司 | A kind of super-thin low-voltage thermoplastic film and its preparation process |
| CN111073102A (en) * | 2019-12-13 | 2020-04-28 | 宁波市付枫塑业有限公司 | Low-temperature high-permeability toughened PE shrink film material and preparation method thereof |
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| CN106317271B (en) | 2019-02-15 |
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