CN106585013B - Polyolefin biaxial tension electrostatic film and preparation method thereof - Google Patents
Polyolefin biaxial tension electrostatic film and preparation method thereof Download PDFInfo
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- CN106585013B CN106585013B CN201611126563.0A CN201611126563A CN106585013B CN 106585013 B CN106585013 B CN 106585013B CN 201611126563 A CN201611126563 A CN 201611126563A CN 106585013 B CN106585013 B CN 106585013B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
Abstract
The present invention discloses a kind of polyolefin biaxial tension electrostatic film and preparation method thereof, wherein, the polyolefin biaxial tension electrostatic film includes upper epidermis, three layers of sandwich layer and the laminate of layer five being sequentially distributed, and the upper epidermis is prepared by following component：93~97 parts of propylene copolymers；3~7 parts of anti-blocking agent；Three layers of sandwich layer are prepared by following component：99~100 parts of linea low density vinyl copolymer；0.1~1 part of slipping agent；The upper epidermis is prepared by following component：88~97 parts of propylene copolymers；2~7 parts of anti-blocking agent；1~5 part of antistatic additive.Technical scheme can be obviously improved the transparency and heat sealability of product, coordinate electrostatic sealing mode effectively to utilize material, reduce the waste of leftover pieces, it is free from environmental pollution the advantages of.The packaging demand of high-speed packaging and electrostatic sealing can either be met, while retain heat sealability, traditional hot-seal is applicable to, meets Different Package mode.
Description
Technical field
The present invention relates to technical field of polymer materials, more particularly to a kind of polyolefin biaxial tension electrostatic film and its preparation
Method.
Background technology
Polyolefine heat shrinking film (POF) is typically made of PP and PE coextru-laminations, while is contained polyethylene and gathered
The advantages of propylene, and performance is better than polyethylene film and polypropylene screen again, as with high transparency, low temperature resistant, high intensity, resistance to rubbing
Combination property.POF films are widely used for industry and retail business various products such as food, cosmetics, medicine and the bundle of electronics production
Bundle and packaging applications.POF films are generally 3-5 layers coextrusion structure, and stretch processes are mainly made up of following process:Match somebody with somebody
Expect batch mixing, extruder extrusion, pipe is extruded as by co-extrusion die head, pipe quenching, preheated through drawing into long Heating tube,
Inflation in big Heating tube, thermal finalization, cooling, winding, cutting and storage.Before POF shrink films coat to product：Film needs
Form a closed structure and carry out product wrapping, this just needs to carry out vertical and horizontal fitting, is commonly called as sealing.Typically mode is
It is bonded by applying heat under certain temperature and pressure, is commonly referred to as sealed.Traditional film is when longitudinally sealing
Reserved certain width is needed to be sealed, film caused leftover pieces after sealing typically abandon or recovery, to environment
Bring certain pollution risk.Monthly 100 tons of the film dosage such as a factory using width for 360mm, take heat-sealing sealing shape
Formula, leftover pieces width about 2*20mm (bilayer), monthly about 10 tons of waste of materials, waste ratio about 10%, and annual leftover pieces are about
120 tons.
In the prior art, such as Patent No. CN 103085415A patent, to disclose a kind of polyolefin of coextrusion two-way
Oriented film and preparation method thereof, the film for having this method to prepare have the characteristics of high intensity and high-stiffness, contribute to film
Thinned and lightweight, however, the film, because its top layer typically belongs to high polymer material, sheet resistance volume is generally higher than the 12 of 10
The problem of more than power, easily occurring sealing loosely when high speed electrostatic seals, cause cost higher, and polluting environment.
In view of this, it is necessary to which the polyolefin biaxially oriented film of above-mentioned coextrusion is further improved.
The content of the invention
To solve an at least above-mentioned technical problem present in prior art, the main object of the present invention provides a kind of polyene
Hydrocarbon biaxial tension electrostatic film and preparation method thereof.
To achieve the above object, one aspect of the present invention is：A kind of polyolefin biaxial tension electrostatic is provided
Film, including upper epidermis, three layers of sandwich layer and the laminate of layer five being sequentially distributed, including be sequentially distributed upper epidermis, three
Layer sandwich layer and the laminate of layer five,
The upper epidermis is prepared by following component：
93~97 parts of propylene copolymers；
3~7 parts of anti-blocking agent；
Three layers of sandwich layer are prepared by following component：
99~100 parts of linea low density vinyl copolymer；
0. 1~1 part of slipping agent；
The upper epidermis is prepared by following component：
88~97 parts of propylene copolymers；
2~7 parts of anti-blocking agent；
1~5 part of antistatic additive.
Preferably, the linea low density vinyl copolymer is ethylene copolymer of the fusing point less than 130 DEG C, propylene copolymerization
The blend that thing, ethylene copolymer and propylene copolymer are formed, and the mixture that ethylene copolymer is formed with propylene copolymer
In it is any；
The upper epidermis and the fusing point of layer are higher than the fusing point of sandwich layer.
Preferably, the anti-blocking agent is silica anti-blocking agent.
Preferably, the slipping agent is oleamide, erucamide slip agent or oleamide and erucamide slip agent
Blend.
Preferably, the antistatic additive is Polymer Antistatic Agent.
Preferably, the upper epidermis and any one layer in layer are hot sealing layer, and remaining another layer is Electrostatic Absorption
Layer.
Preferably, the gross thickness of the polyolefin biaxial tension electrostatic film is 7~50um, and the thickness of any sandwich layer
More than upper epidermis or the thickness of layer.
Preferably, the gross thickness of the polyolefin biaxial tension electrostatic film is 9~15um, and the thickness of any sandwich layer
More than upper epidermis or the thickness of layer.
To achieve the above object, one aspect of the present invention is：A kind of polyolefin biaxial tension electrostatic is provided
The preparation method of film, comprises the following steps：
Advance 93~97 parts of mixture propylene copolymers propylene copolymers, the upper epidermis of 3~7 parts of anti-blocking agent, and
The layer of 1~5 part of 88~97 parts of mixture propylene copolymers, 2~7 parts of anti-blocking agent and antistatic additive, and mixture are linear
Three layers of sandwich layer of 0. 1~1 part of 99~100 parts of low-density vinyl copolymer and slipping agent, and layers of material is carried out dispersed
Processing；
By upper epidermis, three layers of sandwich layer and layer respectively by five extruders, and pass through five-layer co-squeezing die head extruded shape
Handled into pipe, and to pipe cooling and shaping, wherein, the temperature of extruder is 185 corresponding to the upper epidermis and layer
~195 DEG C, the temperature of extruder is 180~200 DEG C corresponding to three layers of sandwich layer；
Pipe preheats through cooling and shaping rear haulage to long Heating tube, and by long Heating tube to pipe, wherein, the length
Heating tube is 200~400 DEG C to the preheating temperature of pipe；
Biaxial tension processing formation vacuolar membrane is carried out to the pipe inflation after preheating and to the pipe after inflation, wherein, institute
The temperature for stating biaxial tension processing is 108~110 DEG C, and the biaxial tension includes horizontal and vertical stretching, and draw ratio is
4-7 times；
Cooling vacuolar membrane is forced, and vacuolar membrane is carried out to obtain polyolefin biaxial tension electrostatic film to point splitting processing.
The polyolefin biaxial tension electrostatic film of technical scheme production, high-speed packaging and electrostatic envelope can either be met
The packaging demand of mouth, while retain heat sealability, it is applicable to traditional hot-seal.The polyolefin produced using this programme is two-way
It is of the invention compared with traditional heat-sealing POF film products to stretch electrostatic film using effect on high-speed sealing automatic packaging machine
Electrostatic film is when using effect is consistent with traditional heat-sealing POF products on electrostatic sealing automatic packaging machine, but width is from 360mm
It is down to 340mm, it is possible to reduce film unit area cost and the usage amount of raw material, cost can be saved, and due to film
Material is reduced, and can be reduced the pollution to environment, is a kind of electrostatic adsorption type heat shrink films of energy-conserving and environment-protective.
Embodiment
The technical scheme in the embodiment of the present invention is clearly and completely described below, it is clear that described embodiment
Only part of the embodiment of the invention, rather than whole embodiments.It is common based on the embodiment in the present invention, this area
The every other embodiment that technical staff is obtained under the premise of creative work is not made, belong to the model that the present invention protects
Enclose.
For current generally film because its top layer typically belongs to high polymer material, sheet resistance volume is generally higher than 10 12 powers
More than, the problem of easily occurring sealing loosely when high speed electrostatic seals, cause cost higher, and pollute environment.In order to save
Cost, material and the energy more effectively are utilized, accomplishes non waste edge, reduces the pollution to environment, the way for improving sealing is to take
Electrostatic Absorption, while the thickness of film is further thinned, reduce the weight of unit area.Inventor passes through long-term practice and reality
Test, devise a kind of scheme of polyolefin biaxial tension electrostatic film, concrete scheme refer to following embodiments.
In embodiments of the present invention, the polyolefin biaxial tension electrostatic film, including upper epidermis, the three layers of sandwich layer being sequentially distributed
And the laminate of layer five,
The upper epidermis is prepared by following component：
93~97 parts of propylene copolymers；
3~7 parts of anti-blocking agent；
Three layers of sandwich layer are prepared by following component：
99~100 parts of linea low density vinyl copolymer；
0. 1~1 part of slipping agent；
The upper epidermis is prepared by following component：
88~97 parts of propylene copolymers；
2~7 parts of anti-blocking agent；
1~5 part of antistatic additive.
In the present embodiment, the upper epidermis is hot sealing layer with any one layer in layer, and remaining another layer is inhaled for electrostatic
Attached layer.The upper epidermis of the polyolefin biaxial tension electrostatic film, three layers of sandwich layer and the laminate of layer five can be expressed as A/
B/B/B/C five-layer structures, wherein, A layers, C layers are respectively upper epidermis and layer, and three B layers are sandwich layer, and A layers, C layers can be by squeezing
It is 70mm to go out machine screw diameter, screw slenderness ratio 30:1, extrusion temperature is 180 DEG C and is extruded into；Three sandwich layers can be by squeezing
It is 75mm to go out machine screw diameter, screw slenderness ratio 35:1, extrusion temperature is 190 DEG C and is extruded into.Polyolefin biaxial tension
The specific structure of electrostatic film refer to table 1.
As known from Table 1, B layers（Sandwich layer）There are three layers, the thickness of B layers is all higher than A layers（Upper epidermis）And C layers（Layer）Thickness
Degree.And the main material of B layers is DOWLEX2045G linea low densities vinyl copolymer and slipping agent, the main material of A layers is
FS6612L propylene copolymers, anti-blocking agent, the main material of C layers are FS6612L propylene copolymers, anti-blocking agent and resisted
Electrostatic agent can make polyolefin double by adjusting above-mentioned linea low density vinyl copolymer, propylene copolymers and antistatic additive
Reach optimal antistatic property to stretching electrostatic film.
In the present embodiment, the linea low density vinyl copolymer is common for ethylene copolymer of the fusing point less than 130 DEG C, propylene
The blend that polymers, ethylene copolymer and propylene copolymer are formed, and the mixing that ethylene copolymer is formed with propylene copolymer
It is any in thing；The upper epidermis and the fusing point of layer are higher than the fusing point of sandwich layer.Preferably, the anti-blocking agent is titanium dioxide
Silicon anti-blocking agent.Preferably, the slipping agent is that oleamide, erucamide slip agent or oleamide and erucyl amide are smooth
The blend of agent.Preferably, the antistatic additive is Polymer Antistatic Agent.Due to upper surface and lower surface directly and object
Contact, the heat caused by friction by upper surface and lower surface to sandwich layer transmission, in this way, when upper surface and lower surface to sandwich layer melt
When point is higher than sandwich layer, be advantageous to protect sandwich layer.The anti-blocking agent can select conventional anti-blocking agent, as silica prevents adhesion
Agent, to improve the Kekelé structure count of film.
In a specific embodiment, the gross thickness of the polyolefin biaxial tension electrostatic film is 7~50um, and any institute
The thickness for stating sandwich layer is more than upper epidermis or the thickness of layer.Preferably, the gross thickness of the polyolefin biaxial tension electrostatic film
For 9~15um, and the thickness of any sandwich layer is more than upper epidermis or the thickness of layer.In the present embodiment, polyolefin is two-way
The thickness for stretching electrostatic film can be 7~50um, too thick, can increase cost, too thin, can influence the quality of electrostatic film.
In embodiments of the invention, the preparation method of the polyolefin biaxial tension electrostatic film, comprise the following steps：
Advance 93~97 parts of mixture propylene copolymers propylene copolymers, the upper epidermis of 3~7 parts of anti-blocking agent, and
88~97 parts of mixture propylene copolymers；2~7 parts of anti-blocking agent；The layer that 1~5 part of antistatic additive, and mixture are linearly low
99~100 parts of density vinyl copolymer；Three layers of sandwich layer of 0. 1~1 part of slipping agent, and dispersed place is carried out to layers of material
Reason；
By upper epidermis, three layers of sandwich layer and layer respectively by five extruders, and pass through five-layer co-squeezing die head extruded shape
Handled into pipe, and to pipe cooling and shaping, wherein, the temperature of extruder is 185 corresponding to the upper epidermis and layer
~195 DEG C, the temperature of extruder is 180~200 DEG C corresponding to three layers of sandwich layer；Preferably, 185 DEG C, 190 DEG C, 195 DEG C
It is the preferred value of extruder temperature corresponding to upper epidermis and layer.180 DEG C, 190 DEG C, 200 DEG C are that three layers of sandwich layer are corresponding
Extruder temperature preferred value.The temperature of above-mentioned co-extrusion die head is 179 DEG C.
Pipe preheats through cooling and shaping rear haulage to long Heating tube, and by long Heating tube to pipe, wherein, the length
Heating tube is 200~400 DEG C to the preheating temperature of pipe；More preferably, 200 DEG C, 300 DEG C, 400 DEG C are the preferred of preheating temperature
Value, the temperature requirement of setting can be reached by being preheated to pipe.Specifically, pipe is pulled into heating after cooling
Cylinder, long Heating tube temperature are that region can be divided into 1-4 areas, and corresponding temperature is divided into：250 DEG C, 260 DEG C, 270 DEG C, 280 DEG C.
Biaxial tension processing formation vacuolar membrane is carried out to the pipe inflation after preheating and to the pipe after inflation, wherein, institute
The temperature for stating biaxial tension processing is 108~110 DEG C, and stretching can be divided into horizontal and vertical stretching, and draw ratio is 4-7 times；
In this step, the blank temperature after preheating is higher, processing can be inflated after appropriate cooling, then in the temperature of long Heating tube
Degree can carry out transverse direction and longitudinal direction stretch processing to the pipe after inflation and form vacuolar membrane, transverse direction and longitudinal direction is drawn at 108~110 DEG C
The multiple stretched is preferably 4,5.5,7 times.
Cooling vacuolar membrane is forced, and vacuolar membrane is carried out to obtain polyolefin biaxial tension electrostatic film to point splitting processing.The step
In, to dividing the polyolefin biaxial tension electrostatic film after splitting to cut into finished product after winding, solidifying.It is made by the above method
The parameters of polyolefin biaxial tension electrostatic film refer to table 2.
Must can find out from table 2, have such scheme prepare polyolefin biaxial tension electrostatic film, at least transparency,
There is the advantages of being better than prior art film in terms of heat sealability parameter and film thickness.It is emphasized that this polyolefin is double
It is small compared to traditional film to the film thickness of stretching electrostatic film, making for film unit area cost and raw material can be reduced
Dosage, there is the advantages of saving cost and reducing the pollution to environment.
To sum up, technical scheme production polyolefin biaxial tension electrostatic film, can either meet high-speed packaging and
The packaging demand of electrostatic sealing, while retain heat sealability, it is applicable to traditional hot-seal.The polyene produced using this programme
Using effect is compared with traditional heat-sealing POF film products on high-speed sealing automatic packaging machine for hydrocarbon biaxial tension electrostatic film, originally
The electrostatic film of invention electrostatic sealing automatic packaging machine on using effect it is consistent with traditional heat-sealing POF products when, but width from
360mm is down to 340mm, it is possible to reduce film unit area cost and the usage amount of raw material, cost can be saved, and due to thin
The material of film is reduced, and can be reduced the pollution to environment, is a kind of electrostatic adsorption type heat shrink films of energy-conserving and environment-protective.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the scope of the invention, it is every at this
Under the inventive concept of invention, the equivalent structure transformation made using present specification, or directly/other are used in indirectly
Related technical field is included in the scope of patent protection of the present invention.
Claims (8)
1. a kind of polyolefin biaxial tension electrostatic film, it is characterised in that the polyolefin biaxial tension electrostatic film includes dividing successively
The upper epidermis of cloth, three layers of sandwich layer and the laminate of layer five,
The upper epidermis is prepared by following component：
93~97 parts of propylene copolymers；
3~7 parts of anti-blocking agent；
Three layers of sandwich layer are prepared by following component：
99~100 parts of linea low density vinyl copolymer；
0.1~1 part of slipping agent；
The layer is prepared by following component：
88~97 parts of propylene copolymers；
2~7 parts of anti-blocking agent；
1~5 part of antistatic additive,
Wherein, the preparation method of the polyolefin biaxial tension electrostatic film comprises the following steps：
Advance 93~97 parts of mixture propylene copolymers propylene copolymers, the upper epidermis of 3~7 parts of anti-blocking agent, and mixture
The layer of 1~5 part of 88~97 parts of propylene copolymers, 2~7 parts of anti-blocking agent and antistatic additive, and mixture are linear low close
Three layers of sandwich layer of 0.1~1 part of 99~100 parts of vinyl copolymer and slipping agent are spent, and dispersed processing is carried out to layers of material；
By upper epidermis, three layers of sandwich layer and layer respectively by five extruders, and pipe is extruded into by five-layer co-squeezing die head
Base, and pipe cooling and shaping are handled, wherein, the temperature of extruder is 185~195 corresponding to the upper epidermis and layer
DEG C, the temperature of extruder is 180~200 DEG C corresponding to three layers of sandwich layer；
Pipe preheats through cooling and shaping rear haulage to long Heating tube, and by long Heating tube to pipe, wherein, the long heating
Cylinder is 200~400 DEG C to the preheating temperature of pipe；
Biaxial tension processing formation vacuolar membrane is carried out to the pipe inflation after preheating and to the pipe after inflation, wherein, it is described double
It it is 108~110 DEG C to the temperature of stretch processing, the biaxial tension includes horizontal and vertical stretching, and draw ratio is 4-7
Times；
Cooling vacuolar membrane is forced, and vacuolar membrane is carried out to obtain polyolefin biaxial tension electrostatic film to point splitting processing.
2. polyolefin biaxial tension electrostatic film as claimed in claim 1, it is characterised in that the linea low density alkenes copolymerization
Thing is the mixing that ethylene copolymer, propylene copolymer and ethylene copolymer of the fusing point less than 130 DEG C are formed with propylene copolymer
It is any in thing；
The upper epidermis and the fusing point of layer are higher than the fusing point of sandwich layer.
3. polyolefin biaxial tension electrostatic film as claimed in claim 1, it is characterised in that the anti-blocking agent is silica
Anti-blocking agent.
4. polyolefin biaxial tension electrostatic film as claimed in claim 1, it is characterised in that the slipping agent be oleamide,
The blend of erucamide slip agent or oleamide and erucamide slip agent.
5. polyolefin biaxial tension electrostatic film as claimed in claim 1, it is characterised in that the antistatic additive is polymer electrolyte
Antistatic additive.
6. polyolefin biaxial tension electrostatic film as claimed in claim 1, it is characterised in that the upper epidermis is hot sealing layer, under
Top layer is antistatic layer.
7. the polyolefin biaxial tension electrostatic film as described in any one of claim 1 to 6, it is characterised in that the polyolefin is double
Gross thickness to stretching electrostatic film is 7~50um, and the thickness of any sandwich layer is more than upper epidermis or the thickness of layer.
8. the polyolefin biaxial tension electrostatic film as described in any one of claim 1 to 6, it is characterised in that the polyolefin is double
Gross thickness to stretching electrostatic film is 9~15um, and the thickness of any sandwich layer is more than upper epidermis or the thickness of layer.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1425549A (en) * | 2003-01-27 | 2003-06-25 | 林小松 | Method for producing two-way stretching polypropylene film for cigarette by pipe soaking method |
| CN104910488A (en) * | 2015-06-02 | 2015-09-16 | 安徽鑫泰玻璃科技有限公司 | Glass electrostatic protection film |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1425549A (en) * | 2003-01-27 | 2003-06-25 | 林小松 | Method for producing two-way stretching polypropylene film for cigarette by pipe soaking method |
| CN104910488A (en) * | 2015-06-02 | 2015-09-16 | 安徽鑫泰玻璃科技有限公司 | Glass electrostatic protection film |
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