CN103862768B - For polyethylene separators reusable in tire production and preparation method thereof - Google Patents

For polyethylene separators reusable in tire production and preparation method thereof Download PDF

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CN103862768B
CN103862768B CN201410119025.3A CN201410119025A CN103862768B CN 103862768 B CN103862768 B CN 103862768B CN 201410119025 A CN201410119025 A CN 201410119025A CN 103862768 B CN103862768 B CN 103862768B
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film
low density
density polyethylene
polyethylene
reusable
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CN103862768A (en
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蒋晓明
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Hao Chen (wuxi) Plastic Industry Co Ltd
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Hao Chen (wuxi) Plastic Industry Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/911—Cooling
    • 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
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B29C48/10—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils
    • 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
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
    • B29C48/397—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using a single screw
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50—Details of extruders
    • B29C48/505—Screws
    • B29C48/625—Screws characterised by the ratio of the threaded length of the screw to its outside diameter [L/D ratio]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/92—Measuring, controlling or regulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/9258—Velocity
    • B29C2948/9259—Angular velocity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/9258—Velocity
    • B29C2948/926—Flow or feed rate
    • 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
    • B29C2948/92609—Dimensions
    • B29C2948/92647—Thickness
    • 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
    • B29C2948/92828—Raw material handling or dosing, e.g. active hopper or feeding device
    • 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
    • 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

Abstract

The present invention relates to a kind of for polyethylene separators reusable in tire production and preparation method thereof, specifically a kind of isolating membrane of energy Reusability and preparation method thereof in radial tyre production process, belongs to the production technical field of radial.It includes outer membrane, interlayer film and inner layer film；The thickness of trilamellar membrane is than for 3-4:2-4:3-4；The gross thickness of described outer membrane, interlayer film and inner layer film is 30-150 μm；By dispensing, melted, extrusion, blown film, air-cooling moulding and surface treatment, rolling prepare product.Three layers composite polyethylene isolating membrane prepared by the present invention can isolate oxygen, and between each layer of product, the compatibility is good, will not fall off layering, can keep physical and mechanical properties in Reusability situation.

Description

For polyethylene separators reusable in tire production and preparation method thereof
Technical field
The present invention relates to a kind of for polyethylene separators reusable in tire production and preparation method thereof, specifically a kind of isolating membrane of energy Reusability and preparation method thereof in radial tyre production process, belongs to the production technical field of radial.
Background technology
Polyethylene (PE) is the representative of TPO, is mainly used in packaging field, and PE film has the advantage of less costly, good mechanical performance and is widely used in a variety of applications at industrial packaging field.In tire production, in order to avoid rubber scorching, its packaging material need to have a good oxygen barrier property, thus the effectiveness packed with common PE film is poor.Limit oxysensible rubber contact oxygen by special packaging material and ensure rubber quality.
At the design aspect of oxygen barrier packaging material, the method for main flow makes employing multilayer materials ensure in the world.US5077111 devises a kind of composite being made up of multilayer material, and ectonexine has PET to prepare, and sandwich of layers is sealed in pet layer by polymer MXD-6 and prepares.In the multilayer packaging material of US2008241521 design, core layer is made up of PVOH.The common drawback of these methods is in that between different layers, and Material property differences is bigger, it is easy to delamination.
Chinese patent CN101775169A discloses a kind of polyethylene separators for tire production, adds ethylene (methyl) acrylic copolymer, the multi-functional processing aid of plastic cement type and plasticizer in formula, obtains the isolating membrane that isolation performance is excellent.
Summary of the invention
It is an object of the invention to provide a kind of for polyethylene separators in tire production and preparation method thereof；Described isolating membrane is by up of three layers, wherein inside and outside two-layer is made up of Low Density Polyethylene and linear low density polyethylene, intermediate layer is made up of linear low density polyethylene and oxygen absorbent, is selected by oxygen absorbent kind and three kinds of material ratios select the further properties improving product.
According to technical scheme provided by the invention, for polyethylene separators reusable in tire production, including outer membrane, interlayer film and inner layer film；The thickness ratio of trilamellar membrane is followed successively by 3-4:2-4:3-4；
The gross thickness of described outer membrane, interlayer film and inner layer film is 30-150 μm.
Described for polyethylene separators reusable in tire production, by weight: described outer membrane and the blend that inner layer film is Low Density Polyethylene and linear low density polyethylene, it is 30-40 part；Interlayer film is linear low density polyethylene and oxygen absorbent blend, for 20-40 part.
In described outer membrane and inner layer film, Low Density Polyethylene and linear low density polyethylene weight ratio are 0.1-10:1；In interlayer film, linear low density polyethylene is 10-100:1 with the weight ratio of oxygen absorbent.
Described oxygen absorbent is the electrolyte of the iron powder of mass fraction 90%-98% and 2%-10%.
Described electrolyte is specially one or more in Fe3C, FeO or calcium chloride.
For the preparation method of polyethylene separators reusable in tire production, step is as follows by weight:
(1) dispensing melts: outer membrane and the blend that inner layer film is Low Density Polyethylene and linear low density polyethylene, is 30-40 part；Interlayer film is linear low density polyethylene and oxygen absorbent blend, for 20-40 part；Delivering to raw material to heat respectively in three extruders of three-layer co-extruded inflation film manufacturing machine and be melt into polymer melt, melt temperature is 200-230 DEG C；
(2) extrusion: closed in mouth die upper layer stacking by the die head each layer component of each runner, be combined into co-extrusion film；Described inflation film manufacturing machine adopts single screw extrusion machine, and extruder body temperature is 170-230 DEG C, and die head temperature is 180-240 DEG C, and screw speed is 10-40 rev/min；
(3) blown film: described polymer melt prepares through inflation of three-layer co-extruded blown film unit, and drawn becomes thin film, and blow-up ratio is 2-3, and draw speed is 8-25m/min；
(4) air-cooling moulding: the thin film stretched is adopted air-cooling moulding, and cooling line height is 0.5-1m；
(5) surface treatment, rolling: by the film surface sided corona treatment after cooling, process electric current is 160-210A, and peak power output is 1-20kw, is rolled into film roll, cuts and is packaged to be product for polyethylene separators reusable in tire production.
The screw slenderness ratio of step (2) described single screw extrusion machine is 25:1,26:1.2,27:1.5,28:1.7 or 30:1.9.
The melt index of described Low Density Polyethylene is 1.5-5, and the melt index of linear low density polyethylene is 1.8-7.
The three layers composite polyethylene isolating membrane thickness that described method obtains is 30 μm-150 μm.According to different-thickness, select different screw, draw speed and blow-up ratio.
Adopting the technical method of the present invention, the three layers composite polyethylene isolating membrane of preparation has good mechanical property and oxygen barrier property, and the packaging meeting rubber in tire production uses.Between trilamellar membrane, adhesion is good, it is not easy to separate, can Reusability.
Beneficial effects of the present invention: three layers composite polyethylene isolating membrane prepared by the present invention can isolate oxygen, and between each layer of product, the compatibility is good, will not fall off layering, can keep physical and mechanical properties in Reusability situation.
Detailed description of the invention
The present invention will be further elucidated by the following examples.
Embodiment 1
For polyethylene separators reusable in tire production, including outer membrane, interlayer film and inner layer film；The thickness ratio of trilamellar membrane is followed successively by 3:2:3；
The gross thickness of described outer membrane, interlayer film and inner layer film is 30 μm.
Described for polyethylene separators reusable in tire production, by weight: described outer membrane and the blend that inner layer film is Low Density Polyethylene and linear low density polyethylene, it is 30 parts；Interlayer film is linear low density polyethylene and oxygen absorbent blend, is 20 parts.
In described outer membrane and inner layer film, Low Density Polyethylene and linear low density polyethylene weight ratio are 1:1；In interlayer film, linear low density polyethylene is 10:1 with the weight ratio of oxygen absorbent.
Described oxygen absorbent is the electrolyte of the iron powder of mass fraction 90% and 10%.
Described electrolyte is specially Fe3C、FeO。
For the preparation method of polyethylene separators reusable in tire production, step is as follows by weight:
(1) dispensing melts: outer membrane and the blend that inner layer film is Low Density Polyethylene and linear low density polyethylene, is 30 parts；Interlayer film is linear low density polyethylene and oxygen absorbent blend, is 20 parts；Delivering to raw material to heat respectively in three extruders of three-layer co-extruded inflation film manufacturing machine and be melt into polymer melt, melt temperature is 200 DEG C；
(2) extrusion: closed in mouth die upper layer stacking by the die head each layer component of each runner, be combined into co-extrusion film；Described inflation film manufacturing machine adopts single screw extrusion machine, and extruder body temperature is 170 DEG C, and die head temperature is 180 DEG C, and screw speed is 10 revs/min；
(3) blown film: described polymer melt prepares through inflation of three-layer co-extruded blown film unit, and drawn becomes thin film, and blow-up ratio is 2, and draw speed is 8m/min；
(4) air-cooling moulding: the thin film stretched is adopted air-cooling moulding, and cooling line height is 0.5m；
(5) surface treatment, rolling: by the film surface sided corona treatment after cooling, process electric current is 160A, and peak power output is 20kw, is rolled into film roll, cuts and is packaged to be product for polyethylene separators reusable in tire production.
The screw slenderness ratio of step (2) described single screw extrusion machine is 25:1.
Embodiment 2
For polyethylene separators reusable in tire production, including outer membrane, interlayer film and inner layer film；The thickness ratio of trilamellar membrane is followed successively by 4:2:4；
The gross thickness of described outer membrane, interlayer film and inner layer film is 150 μm.
Described for polyethylene separators reusable in tire production, by weight: described outer membrane and the blend that inner layer film is Low Density Polyethylene and linear low density polyethylene, it is 35 parts；Interlayer film is linear low density polyethylene and oxygen absorbent blend, is 35 parts.
In described outer membrane and inner layer film, Low Density Polyethylene and linear low density polyethylene weight ratio are 6:1；In interlayer film, linear low density polyethylene is 60:1 with the weight ratio of oxygen absorbent.
Described oxygen absorbent is the electrolyte of the iron powder of mass fraction 95% and 8%.
Described electrolyte is specially Fe3C。
For the preparation method of polyethylene separators reusable in tire production, step is as follows by weight:
(1) dispensing melts: outer membrane and the blend that inner layer film is Low Density Polyethylene and linear low density polyethylene, is 35 parts；Interlayer film is linear low density polyethylene and oxygen absorbent blend, is 30 parts；Delivering to raw material to heat respectively in three extruders of three-layer co-extruded inflation film manufacturing machine and be melt into polymer melt, melt temperature is 215 DEG C；
(2) extrusion: closed in mouth die upper layer stacking by the die head each layer component of each runner, be combined into co-extrusion film；Described inflation film manufacturing machine adopts single screw extrusion machine, and extruder body temperature is 200 DEG C, and die head temperature is 210 DEG C, and screw speed is 25 revs/min；
(3) blown film: described polymer melt prepares through inflation of three-layer co-extruded blown film unit, and drawn becomes thin film, and blow-up ratio is 3, and draw speed is 20m/min；
(4) air-cooling moulding: the thin film stretched is adopted air-cooling moulding, and cooling line height is 0.8m；
(5) surface treatment, rolling: by the film surface sided corona treatment after cooling, process electric current is 180A, and peak power output is 10kw, is rolled into film roll, cuts and is packaged to be product for polyethylene separators reusable in tire production.
The screw slenderness ratio of step (2) described single screw extrusion machine is 28:1.7.
Embodiment 3
For polyethylene separators reusable in tire production, including outer membrane, interlayer film and inner layer film；The thickness ratio of trilamellar membrane is followed successively by 4:2:4；
The gross thickness of described outer membrane, interlayer film and inner layer film is 100 μm.
Described for polyethylene separators reusable in tire production, by weight: described outer membrane and the blend that inner layer film is Low Density Polyethylene and linear low density polyethylene, it is 40 parts；Interlayer film is linear low density polyethylene and oxygen absorbent blend, is 40 parts.
In described outer membrane and inner layer film, Low Density Polyethylene and linear low density polyethylene weight ratio are 10:1；In interlayer film, linear low density polyethylene is 100:1 with the weight ratio of oxygen absorbent.
Described oxygen absorbent is the electrolyte of the iron powder of mass fraction 98% and 2%.
Described electrolyte is specially FeO and calcium chloride.
For the preparation method of polyethylene separators reusable in tire production, step is as follows by weight:
(1) dispensing melts: outer membrane and the blend that inner layer film is Low Density Polyethylene and linear low density polyethylene, is 40 parts；Interlayer film is linear low density polyethylene and oxygen absorbent blend, is 40 parts；Delivering to raw material to heat respectively in three extruders of three-layer co-extruded inflation film manufacturing machine and be melt into polymer melt, melt temperature is 230 DEG C；
(2) extrusion: closed in mouth die upper layer stacking by the die head each layer component of each runner, be combined into co-extrusion film；Described inflation film manufacturing machine adopts single screw extrusion machine, and extruder body temperature is 230 DEG C, and die head temperature is 240 DEG C, and screw speed is 10-40 rev/min；
(3) blown film: described polymer melt prepares through inflation of three-layer co-extruded blown film unit, and drawn becomes thin film, and blow-up ratio is 3, and draw speed is 25m/min；
(4) air-cooling moulding: the thin film stretched is adopted air-cooling moulding, and cooling line height is 1m；
(5) surface treatment, rolling: by the film surface sided corona treatment after cooling, process electric current is 210A, and peak power output is 20kw, is rolled into film roll, cuts and is packaged to be product for polyethylene separators reusable in tire production.
The screw slenderness ratio of step (2) described single screw extrusion machine is 26:1.2.
Embodiment products therefrom performance is as shown in table 1 below:
Table 1
By upper form it can be seen that the preparation method adopting the present invention, the three layers composite polyethylene isolating membrane of preparation has good elongation percentage and physical and mechanical properties.

Claims (5)

1., for reusable polyethylene separators in tire production, it is characterized in that: include outer membrane, interlayer film and inner layer film；The thickness ratio of trilamellar membrane is followed successively by 3-4:2-4:3-4；The gross thickness of described outer membrane, interlayer film and inner layer film is 30-150 μm；
Described outer membrane and the blend that inner layer film is Low Density Polyethylene and linear low density polyethylene, be 30-40 part by weight；Interlayer film is linear low density polyethylene and oxygen absorbent blend, is calculated as 20-40 part by weight；
In described outer membrane and inner layer film, Low Density Polyethylene and linear low density polyethylene weight ratio are 0.1-10:1；In interlayer film, linear low density polyethylene is 10-100:1 with the weight ratio of oxygen absorbent.
2. as claimed in claim 1 for reusable polyethylene separators in tire production, it is characterized in that: described oxygen absorbent is the electrolyte of the iron powder of mass fraction 90%-98% and 2%-10%.
3., as claimed in claim 2 for reusable polyethylene separators in tire production, it is characterized in that: described electrolyte is specially Fe3One or more in C, FeO or calcium chloride.
4., for the preparation method of reusable polyethylene separators in tire production described in claim 1, it is characterized in that step is as follows:
(1) dispensing melts: outer membrane and the blend that inner layer film is Low Density Polyethylene and linear low density polyethylene, is 30-40 part by weight；Interlayer film is linear low density polyethylene and oxygen absorbent blend, is calculated as 20-40 part by weight；Delivering to raw material to heat respectively in three extruders of three-layer co-extruded inflation film manufacturing machine and be melt into polymer melt, melt temperature is 200-230 DEG C；
(2) extrusion: each layer component is closed in mouth die upper layer stacking by each runner of die head, is combined into co-extrusion film；Described inflation film manufacturing machine adopts single screw extrusion machine, and extruder body temperature is 170-230 DEG C, and die head temperature is 180-240 DEG C, and screw speed is 10-40 rev/min；
(3) blown film: described polymer melt prepares through inflation of three-layer co-extruded blown film unit, and drawn becomes thin film, and blow-up ratio is 2-3, and draw speed is 8-25m/min；
(4) air-cooling moulding: the thin film stretched is adopted air-cooling moulding, and cooling line height is 0.5-1m；
(5) surface treatment, rolling: by the film surface sided corona treatment after cooling, process electric current is 160-210A, and peak power output is 1-20kW, is rolled into film roll, cuts and is packaged to be for polyethylene separators reusable in tire production.
5., as claimed in claim 4 for the preparation method of reusable polyethylene separators in tire production, it is characterized in that: the screw slenderness ratio of step (2) described single screw extrusion machine is 25:1,26:1.2,27:1.5,28:1.7 or 30:1.9.
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CN106808676A (en) * 2015-11-27 2017-06-09 朱晓鹏 A kind of strength barrier film manufacture craft and a kind of strength barrier film
CN108189506B (en) * 2018-01-16 2019-12-20 青岛东海包装产业有限公司 Heat-sealing repeated easy-to-tear PE film and preparation method thereof

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Denomination of invention: Polyethylene isolation film used repeatedly in tire production and its preparation method

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