CN106626653A - Polyolefin biaxially oriented thin composite film and preparation method thereof - Google Patents
Polyolefin biaxially oriented thin composite film and preparation method thereof Download PDFInfo
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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
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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
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0018—Combinations of extrusion moulding with other shaping operations combined with shaping by orienting, stretching or shrinking, e.g. film blowing
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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
- B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
- B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being 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
- B29C48/92—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
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
- B29C55/10—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial
- B29C55/12—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial biaxial
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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
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
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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
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
- B32B27/306—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl acetate or vinyl alcohol (co)polymers
-
- 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
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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
- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
- B65D65/38—Packaging materials of special type or form
- B65D65/40—Applications of laminates for particular packaging purposes
-
- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2007/00—Flat articles, e.g. films or sheets
-
- 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
- B32B2250/00—Layers arrangement
- B32B2250/24—All layers being polymeric
- B32B2250/246—All polymers belonging to those covered by groups B32B27/32 and B32B27/30
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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
- B32B2250/00—Layers arrangement
- B32B2250/40—Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
-
- 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
- B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
- B32B2264/10—Inorganic particles
- B32B2264/102—Oxide or hydroxide
-
- 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
- B32B2270/00—Resin or rubber layer containing a blend of at least two different polymers
-
- 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/31—Heat sealable
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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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/54—Yield strength; Tensile strength
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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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/582—Tearability
- B32B2307/5825—Tear resistant
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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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/732—Dimensional properties
- B32B2307/734—Dimensional stability
- B32B2307/736—Shrinkable
-
- 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
- B32B2553/00—Packaging equipment or accessories not otherwise provided for
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Abstract
The invention discloses a polyolefin biaxially oriented thin composite film and a preparation method thereof. The polyolefin biaxially oriented thin composite film is of a five-layer layered structure including an upper surface layer, two outer core layers, an inner core layer located between the two outer core layers, and a lower surface layer; both the upper surface layer and the lower surface layer are prepared from the following components: 80 to 90 parts of propylene copolymer, 6 to 8 parts of anti-blocking agent, 2 to 6 parts of slipping agent and 2 to 6 parts of hot slipping agent; both outer core layers are prepared from the following components: 50 to 70 parts of linear low-density alkene copolymer, 30 to 50 parts of ultralow-density olefin polymer and 1 to 1.5 parts of slipping agent; and the inner core layer is prepared from the following components: 43.5 to 64 parts of linear low-density alkene copolymer, 30 to 40 parts of ethylene-vinyl acetate copolymer, 5 to 15 parts of metallocene olefin polymer and 1 to 1.5 parts of slipping agent. The technical scheme of the invention has good slipping, hot slipping and contracting effects.
Description
Technical field
The present invention relates to technical field of polymer materials, more particularly to a kind of thin laminated film of polyolefin biaxial tension and its
Preparation method.
Background technology
Polyolefine heat shrinking film (POF) is typically made using PP and PE coextru-laminations, while containing polyethylene and gathering
The advantage of propylene, and performance is again better than polyethylene film and polypropylene screen, such as has high transparency, low temperature resistant, high intensity, resistance to rubs
Combination property.POF films are widely used for industry and the retail business various products bundle that for example food, cosmetics, medicine and electronics are produced
Prick and packaging applications.POF films are generally 3-5 layers and are coextruded structure, and stretch processes are mainly made up of following operation:Match somebody with somebody
Material batch mixing, extruder extrusion, by co-extrusion die head pipe is extruded as, and pipe quenching, Jing is drawn into the preheating of long Heating tube,
Inflation in big Heating tube, thermal finalization, cooling, winding, cutting and warehouse-in.
In prior art, with the continuous development in market, the packaging effect and packaging speed of shrink film are proposed more
High requirement.The shrinkage factor of general shrink film is bigger, and contractive effect is better, but shrink film is softer, is more susceptible to self-adhesion phenomenon,
Kekelé structure count is unstable, causes production to shut down when serious, and packaging speed is produced a very large impact.Packaging speed is faster, to film machine
Tool performance requirement and hot smoothness are also higher, and the mechanical performance of film and hot smoothness are low, are easily caused what film was easily broken
Problem.
In view of this, it is necessary to which above-mentioned film 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
Thin laminated film of hydrocarbon biaxial tension and preparation method thereof.
For achieving the above object, one aspect of the present invention is：There is provided a kind of polyolefin biaxial tension thin multiple
Close film, including upper epidermis, two outer core layers, the inner sandwich layer between two outer core layers and the laminate of layer five；
The upper epidermis and layer are prepared by following component：
80～90 parts of propylene copolymers；
6～8 parts of anti-blocking agent；
2～6 parts of slipping agent；
2～6 parts of hot slipping agent；
Two-layer outer core layer is prepared by following component：
Linea low density vinyl copolymer 48.5-69 parts；
Ethylene-vinyl acetate copolymer or extremely-low density olefin polymer 30-50 parts；
1～1.5 part of slipping agent；
The inner sandwich layer has following component to prepare：
Linea low density vinyl copolymer 43.5-64 parts；
Ethene-vinyl acetate copolymerization or extremely-low density olefin polymer 30-40 parts；
Metallocene olefin polymerization thing 5-15 parts；
1～1.5 part of slipping agent.
Preferably, the anti-blocking agent is silica anti-blocking agent or organic anti-blocking agent.
Preferably, the slipping agent is oleamide, erucamide slip agent or oleamide and erucamide slip agent
Blend.
Preferably, the density of the extremely-low density olefin polymer is 0.880～0.912g/ cm.
Preferably, skin-friction coefficient of the thin laminated film of the polyolefin biaxial tension at a temperature of 25 DEG C be 0.10～
0.35。
Preferably, skin-friction coefficient of the thin laminated film of the polyolefin biaxial tension at a temperature of 55 DEG C be 0.15～
0.35。
Preferably, the gross thickness of the thin laminated film of the polyolefin biaxial tension is 7～50um, and the thickness of inner sandwich layer is equal
More than the thickness of outer sandwich layer, upper epidermis or layer.
Preferably, the gross thickness of the thin laminated film of the polyolefin biaxial tension is 10～30um, and the thickness of inner sandwich layer
It is all higher than the thickness of outer sandwich layer, upper epidermis or layer.
For achieving the above object, one aspect of the present invention is：There is provided a kind of polyolefin biaxial tension thin THIN COMPOSITE
The preparation method of film, comprises the steps：
In advance 80～90 parts of mixture propylene copolymers, 6～8 parts of anti-blocking agent, 2～6 parts of slipping agent, 2～6 parts of hot slipping agent
Upper epidermis and layer, and mixture linea low density vinyl copolymer 48.5-69 parts, ethylene-vinyl acetate copolymer or super
Low-density olefin polymer 30-50 parts and two outer core layers of 1～1.5 part of slipping agent, and linea low density vinyl copolymer
43.5-64 parts, ethene-vinyl acetate copolymerization or extremely-low density olefin polymer 30-40 parts, metallocene olefin polymerization thing 5-15 parts
And the inner sandwich layer of 1～1.5 part of slipping agent, and dispersed process is carried out to layers of material；
By upper epidermis, two outer core layers, inner sandwich layer and layer respectively by five extruders, and squeeze through five-layer co-squeezing die head
Go out to form pipe, and to the process of pipe cooling shaping, wherein, the temperature of the upper epidermis and the corresponding extruder of layer is
185～195 DEG C, the temperature of two outer core layers and the corresponding extruder of inner sandwich layer is 180～200 DEG C；
Pipe Jing cooling and shapings rear haulage is preheated by long Heating tube to long Heating tube to pipe, wherein, the long heating
Cylinder is 200～400 DEG C to the preheating temperature of pipe；
Biaxial tension process 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, draw ratio is 4-7
Times；
Cooling vacuolar membrane is forced, and vacuolar membrane is carried out to obtain the thin laminated film of polyolefin biaxial tension to point cutting process open.
The thin laminated film of polyolefin biaxial tension of technical scheme production, both with good Kekelé structure count, higher
Tear resistance and mechanical performance, meet high-speed packaging demand；There is hot smoothness simultaneously, at high temperature with certain slippery.
Using this programme produce the thin laminated film of polyolefin biaxial tension on high-speed sealing automatic packaging machine using effect with tradition
Heat-sealing POF products compare, with heat-sealing temperature is low, heat sealable temperature width, with the smooth characteristic of heat, with present invention production
With preferable smoothness, hot smoothness and contractive effect, larger elongation can guarantee that preferable tear resistance to film,
Can improve during high-speed packaging because excessive velocities cause the problem that film is pulled off, to improve the performance of film.
Specific embodiment
The technical scheme in the embodiment of the present invention is clearly and completely described below, it is clear that described embodiment
Only a part of embodiment of the invention, rather than the embodiment of whole.Based on the embodiment in the present invention, this area is common
The every other embodiment that technical staff is obtained under the premise of creative work is not made, belongs to the model of present invention protection
Enclose.
At present the shrinkage factor of general shrink film is bigger, and contractive effect is better, but shrink film can be softer, it is easy to self-adhesion occurs and shows
As Kekelé structure count is unstable, causes production to shut down when serious, and packaging speed is produced a very large impact.Packaging speed is faster, to film
Mechanical property requirements and hot smoothness are also higher, and the mechanical performance of film and hot smoothness are low, are easily caused film and easily break
Problem.Obtain through long-term practice, hot smoothness and shrinkage are two important parameters of laminated film.Inventor is led to
Long-term production practices and multiple experiment repeatedly are crossed, is devised a kind of simultaneously more excellent, refreshing with heat with thermal contraction performance
The scheme of the thin laminated film of polyolefin biaxial tension of sliding characteristic, concrete scheme refer to following embodiments.
In embodiments of the present invention, the thin laminated film of polyolefin biaxial tension, including upper epidermis, two outer core layers, positioned at two
Inner sandwich layer and the laminate of layer five between outer core layer；
The upper epidermis and layer are prepared by following component：
80～90 parts of propylene copolymers；
6～8 parts of anti-blocking agent；
2～6 parts of slipping agent；
2～6 parts of hot slipping agent；
Two-layer outer core layer is prepared by following component：
69 parts of linea low density alkenes copolymerization 48.5-；
Ethylene-vinyl acetate copolymer or extremely-low density olefin polymer 30-50 parts；
1～1.5 part of slipping agent；
The inner sandwich layer has following component to prepare：
Linea low density vinyl copolymer 43.5-64 parts；
Ethene-vinyl acetate copolymerization or extremely-low density olefin polymer 30-40 parts；
Metallocene olefin polymerization thing 5-15 parts；
1～1.5 part of slipping agent.
In the present embodiment, the upper epidermis of the thin laminated film of polyolefin biaxial tension, two outer core layers, inner sandwich layer and following table
Five laminate of layer can be expressed as A/B/ C/ B/D five-layer structures, wherein, A layers, D layers are respectively upper epidermis and following table
Layer, two B layers are outer sandwich layer, and C layers are inner sandwich layer, and A layers, D layers can be by a diameter of 70mm of extruder screw, screw slenderness ratio
30:1, extrusion temperature is 180 DEG C and is extruded into；B layers and C layers can be by a diameter of 75mm of extruder screw, screw slenderness ratio
35:1, extrusion temperature is 190 DEG C and is extruded into.The specific structure of the thin laminated film of polyolefin biaxial tension refer to table 1.
As known from Table 1, B layers（Outer sandwich layer）There are two-layer, C layers（Inner sandwich layer）Thickness be all higher than A layers（Upper epidermis）, B layers（Outward
Sandwich layer）And C layers（Layer）Thickness.And the main material of B layers be DOWLEX2045G linea low density vinyl copolymers,
Elastomeric EVA ethylene-vinyl acetate copolymers or 4203 extremely-low density olefin polymers, the main material of C layers is
DOWLEX2045G linea low density vinyl copolymers, EVA ethylene-vinyl acetate copolymers or 4203 extremely-low density olefinic polymerizations
8112 metallocene olefin polymerization things of thing and high tear resistance；The main material of A layers and D layers be FS6612L propylene copolymers,
Anti-blocking agent and slipping agent, by adjusting above-mentioned linea low density vinyl copolymer, ethene-vinyl acetate copolymerization or extremely-low density
Olefin polymer, metallocene olefin polymerization thing and propylene copolymers, reach can the thin laminated film of polyolefin biaxial tension
To optimal performance.
In the present embodiment, the anti-blocking agent is silica anti-blocking agent or organic anti-blocking agent.Preferably, it is described refreshing
Lubrication prescription is any one in oleamide, erucamide slip agent and oleamide, the blend of erucamide slip agent, wherein, A
Layer includes but is not limited to the hot slipping agent of silicone of non-migratory.Preferably, the density of the extremely-low density olefin polymer is
0.880～0.912g/ cm.The anti-blocking agent can select conventional anti-blocking agent, such as organic anti-blocking agent of high transparency, with
Improve the transparency of film.
In a specific embodiment, the thin laminated film of the polyolefin biaxial tension is at a temperature of 25 DEG C（Normal temperature）Table
Face coefficient of friction is 0.10～0.35.Preferably, the skin-friction coefficient of the thin laminated film of the polyolefin biaxial tension is
0.15～0.25, wherein, 0.15,0.20,0.25 is preferred value.The thin laminated film of the polyolefin biaxial tension is in 55 DEG C of temperature
Under（High temperature）Skin-friction coefficient be 0.10～0.35.Preferably, the surface of the thin laminated film of the polyolefin biaxial tension
Coefficient of friction is 0.18～0.25, wherein, 0.18,0.21,0.25 is preferred value.Preferably, the polyolefin biaxial tension is thin
The gross thickness of laminated film is 7～50um, and the thickness of inner sandwich layer is all higher than the thickness of outer sandwich layer, upper epidermis or layer.Compared with
Excellent, the gross thickness of the thin laminated film of the polyolefin biaxial tension is 10～30um, and the thickness of inner sandwich layer is all higher than outer core
The thickness of layer, upper epidermis or layer.In the present embodiment, the thickness of the thin laminated film of polyolefin biaxial tension can for 10～
30um, it is too thick, cost can be increased, it is too thin, the quality of vermicelli film can be affected.
In embodiments of the invention, the preparation method of the thin laminated film of polyolefin biaxial tension comprises the steps：
In advance 80～90 parts of mixture propylene copolymers, 6～8 parts of anti-blocking agent, 2～6 parts of slipping agent, 2～6 parts of hot slipping agent
Upper epidermis and layer, and mixture linea low density vinyl copolymer 48.5-69 parts, ethylene-vinyl acetate copolymer or super
Low-density olefin polymer 30-50 parts and two outer core layers of 1～1.5 part of slipping agent, and linea low density vinyl copolymer
1～1.5 part of 43.5-64 parts, extremely-low density olefin polymer 30-40 parts, metallocene olefin polymerization thing 5-15 parts and slipping agent
Inner sandwich layer, and dispersed process is carried out to layers of material；
By upper epidermis, two outer core layers, inner sandwich layer and layer respectively by five extruders, and squeeze through five-layer co-squeezing die head
Go out to form pipe, and to the process of pipe cooling shaping, wherein, the temperature of the upper epidermis and the corresponding extruder of layer is
185～195 DEG C, the temperature of two outer core layers and the corresponding extruder of inner sandwich layer is 180～200 DEG C；Preferably, 185 DEG C,
190 DEG C, the 195 DEG C preferred values for being upper epidermis and the corresponding extruder temperature of layer.180 DEG C, 190 DEG C, 200 DEG C are outward
The preferred value of sandwich layer and the corresponding extruder temperature of inner sandwich layer.The temperature of above-mentioned co-extrusion die head is 179 DEG C.
Pipe Jing cooling and shapings rear haulage is preheated by long Heating tube to 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, through carrying out preheating the temperature requirement that can reach setting to pipe.Specifically, pipe is pulled into after cooling heating
Cylinder, long Heating tube temperature can be divided into 1-4 areas for region, and corresponding temperature is divided into：250 DEG C, 260 DEG C, 270 DEG C, 280 DEG C.
Biaxial tension process 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 process 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, process 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 at 108～110 DEG C, and transverse direction and longitudinal direction is drawn
The multiple stretched is preferably 4,5.5,7 times.
Cooling vacuolar membrane is forced, and vacuolar membrane is carried out to obtain the thin laminated film of polyolefin biaxial tension to point cutting process open.Should
In step, to dividing the thin laminated film of polyolefin biaxial tension after cutting open to cut into finished product after winding, solidification.By above-mentioned
The parameters of the thin laminated film of polyolefin biaxial tension refer to table 2 obtained in method.
Table 2
Can find out there is the thin laminated film of polyolefin biaxial tension prepared by such scheme from table 2, at least in heat-sealing temperature
Degree, elongation at break parameter, three aspects of friction system all have the advantages that better than prior art film.It is emphasized that
The elongation at break parameter of the thin laminated film of this polyolefin biaxial tension, heat-sealing temperature are substantially better than traditional film.
To sum up, technical scheme production the thin laminated film of polyolefin biaxial tension, both with good Kekelé structure count, compared with
High tear resistance and mechanical performance, meet high-speed packaging demand；There is hot smoothness simultaneously, at high temperature with certain cunning
Degree.Using this programme produce the thin laminated film of polyolefin biaxial tension on high-speed sealing automatic packaging machine using effect with pass
The heat-sealing POF products of system are compared, with transparency is high, resistance to tearing is good and with the smooth characteristic of heat, produced with the present invention
Film with preferable smoothness, hot smoothness and contractive effect, larger elongation can guarantee that preferable tear resistance,
Can improve in high-speed packaging because excessive velocities cause the problem that film is pulled off, to improve the performance of film.
The preferred embodiments of the present invention are the foregoing is only, the scope of the claims of the present invention is not thereby limited, it is every in the present invention
Inventive concept under, the equivalent structure transformation made using present specification, or directly/to be used in other indirectly related
Technical field be included in the present invention scope of patent protection in.
Claims (9)
1. a kind of thin laminated film of polyolefin biaxial tension, it is characterised in that the thin laminated film bag of the polyolefin biaxial tension
Include upper epidermis, two outer core layers, the inner sandwich layer between two outer core layers and the laminate of layer five；
The upper epidermis and layer are prepared by following component：
80～90 parts of propylene copolymers；
6～8 parts of anti-blocking agent；
2～6 parts of slipping agent；
2～6 parts of hot slipping agent；
Two-layer outer core layer is prepared by following component：
Linea low density vinyl copolymer 48.5-69 parts；
Ethylene-vinyl acetate copolymer or extremely-low density olefin polymer 30-50 parts；
1～1.5 part of slipping agent；
The inner sandwich layer has following component to prepare：
Linea low density vinyl copolymer 43.5-64 parts；
Extremely-low density olefin polymer 30-40 parts；
Metallocene olefin polymerization thing 5-15 parts；
1～1.5 part of slipping agent.
2. the thin laminated film of polyolefin biaxial tension as claimed in claim 1, it is characterised in that the anti-blocking agent is dioxy
SiClx anti-blocking agent or organic anti-blocking agent.
3. the thin laminated film of polyolefin biaxial tension as claimed in claim 1, it is characterised in that the slipping agent is oleic acid acyl
The blend of amine, erucamide slip agent or oleamide and erucamide slip agent.
4. the thin laminated film of polyolefin biaxial tension as claimed in claim 1, it is characterised in that the extremely-low density alkene gathers
The density of compound is 0.880～0.912g/ cm.
5. the thin laminated film of polyolefin biaxial tension as claimed in claim 1, it is characterised in that the polyolefin biaxial tension
Skin-friction coefficient of the thin laminated film at a temperature of 25 DEG C is 0.07～0.35.
6. the thin laminated film of polyolefin biaxial tension as claimed in claim 1, it is characterised in that the polyolefin biaxial tension
Skin-friction coefficient of the thin laminated film at a temperature of 55 DEG C is 0.15～0.35.
7. the thin laminated film of polyolefin biaxial tension as described in any one of claim 1 to 6, it is characterised in that the polyene
The gross thickness of the thin laminated film of hydrocarbon biaxial tension is 7～50um, and the thickness of inner sandwich layer is all higher than outer sandwich layer, upper epidermis or following table
The thickness of layer.
8. the thin laminated film of polyolefin biaxial tension as described in any one of claim 1 to 6, it is characterised in that the polyene
The gross thickness of the thin laminated film of hydrocarbon biaxial tension be 10～30um, and the thickness of inner sandwich layer be all higher than outer sandwich layer, upper epidermis or under
The thickness on top layer.
9. the preparation method of the thin laminated film of a kind of polyolefin biaxial tension, it is characterised in that the polyolefin biaxial tension is thin
The preparation method of laminated film comprises the steps：
2～6 parts of advance 80～90 parts of mixture propylene copolymers, 6～8 parts of anti-blocking agent, 2～6 parts of slipping agent and hot slipping agent
Upper epidermis and layer, and mixture linea low density vinyl copolymer 48.5-69 parts, ethylene-vinyl acetate copolymer or
Extremely-low density olefin polymer 30-50 parts and two outer core layers of 1～1.5 part of slipping agent, and linea low density alkenes copolymerization
1～1.5 part of thing 43.5-64 parts, extremely-low density olefin polymer 30-40 parts, metallocene olefin polymerization thing 5-15 parts and slipping agent
Inner sandwich layer, and dispersed process is carried out to layers of material；
By upper epidermis, two outer core layers, inner sandwich layer and layer respectively by five extruders, and squeeze through five-layer co-squeezing die head
Go out to form pipe, and to the process of pipe cooling shaping, wherein, the temperature of the upper epidermis and the corresponding extruder of layer is
185～195 DEG C, the temperature of two outer core layers and the corresponding extruder of inner sandwich layer is 180～200 DEG C；
Pipe Jing cooling and shapings rear haulage is preheated by long Heating tube to long Heating tube to pipe, wherein, the long heating
Cylinder is 200～400 DEG C to the preheating temperature of pipe；
Biaxial tension process 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, draw ratio is 4-7
Times；
Cooling vacuolar membrane is forced, and vacuolar membrane is carried out to obtain the thin laminated film of polyolefin biaxial tension to point cutting process open.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108276925A (en) * | 2018-01-31 | 2018-07-13 | 驻马店中原世家防水防腐保温建材科技有限公司 | A kind of novel nano alloy composite sheet material of resistance to root system and preparation method thereof |
| CN110421939A (en) * | 2019-08-09 | 2019-11-08 | 广东安德力新材料有限公司 | Sliding heat shrink films of polyolefin heat with excellent smooth performance and preparation method thereof |
| CN113478934A (en) * | 2021-05-26 | 2021-10-08 | 江阴奕佳包装材料有限公司 | Low-temperature POF (polyester pre-oriented film) matte high-shrinkage film and production process thereof |
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| US20050042431A1 (en) * | 2003-08-22 | 2005-02-24 | Joachim Wagenblast | Multilayer plastics composite |
| CN101439607A (en) * | 2008-12-15 | 2009-05-27 | 浙江比例包装股份有限公司 | High intensity cold contraction stretching casing tube film |
| CN103009761A (en) * | 2012-12-25 | 2013-04-03 | 海南赛诺实业有限公司 | Polyolefin heat-shrinkable film with high shrinking percentage and manufacturing method thereof |
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| US20050042431A1 (en) * | 2003-08-22 | 2005-02-24 | Joachim Wagenblast | Multilayer plastics composite |
| CN101439607A (en) * | 2008-12-15 | 2009-05-27 | 浙江比例包装股份有限公司 | High intensity cold contraction stretching casing tube film |
| CN103009761A (en) * | 2012-12-25 | 2013-04-03 | 海南赛诺实业有限公司 | Polyolefin heat-shrinkable film with high shrinking percentage and manufacturing method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108276925A (en) * | 2018-01-31 | 2018-07-13 | 驻马店中原世家防水防腐保温建材科技有限公司 | A kind of novel nano alloy composite sheet material of resistance to root system and preparation method thereof |
| CN110421939A (en) * | 2019-08-09 | 2019-11-08 | 广东安德力新材料有限公司 | Sliding heat shrink films of polyolefin heat with excellent smooth performance and preparation method thereof |
| CN110421939B (en) * | 2019-08-09 | 2022-01-25 | 广东安德力新材料有限公司 | Polyolefin hot-slip heat shrinkable film with excellent slipping performance and preparation method thereof |
| CN113478934A (en) * | 2021-05-26 | 2021-10-08 | 江阴奕佳包装材料有限公司 | Low-temperature POF (polyester pre-oriented film) matte high-shrinkage film and production process thereof |
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| CN106626653B (en) | 2018-04-03 |
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