CN106626653B - Thin laminated film of polyolefin biaxial tension and preparation method thereof - Google Patents
Thin laminated film of polyolefin biaxial tension 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
-
- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92704—Temperature
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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
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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
- B32B2250/24—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
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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
- 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 present invention discloses a kind of thin laminated film of polyolefin biaxial tension and preparation method thereof, wherein, the thin laminated film of polyolefin biaxial tension includes upper epidermis, two outer core layers, the inner sandwich layer between two outer core layers and the laminate of layer five；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 outer core layers are prepared by following component：50 70 parts of linea low density vinyl copolymer, 30 50 parts of extremely-low density olefin polymer, 1~1.5 part of slipping agent；The inner sandwich layer has following component to prepare：43.5 64 parts of linea low density vinyl copolymer, ethylene-vinyl acetate be copolymerized 30 40 parts, 5 15 parts of metallocene olefin polymerization thing, 1~1.5 part of slipping agent.Technical scheme has preferable smoothness, hot smoothness and contractive effect.
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 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.
In the 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, easier generation self-adhesion phenomenon,
Kekelé structure count is unstable, causes production to shut down when serious, 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, easily cause 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.
To achieve the above object, one aspect of the present invention is：It is thin multiple to provide a kind of polyolefin biaxial tension
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；
Hot 2~6 parts of slipping agent；
Two layers of 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 is copolymerized 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/ cm3.
Preferably, skin-friction coefficient of the thin laminated film of 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 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 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 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.
To achieve the above object, one aspect of the present invention is：It is thin multiple to provide a kind of polyolefin biaxial tension
The preparation method of film is closed, is comprised the following steps：
Advance 80~90 parts of mixture propylene copolymers, 6~8 parts of anti-blocking agent, 2~6 parts of slipping agent, hot slipping agent 2~6
The upper epidermis and layer of part, and mixture linea low density vinyl copolymer 48.5-69 parts, ethylene-vinyl acetate copolymer
Or two outer core layers of 1~1.5 part of extremely-low density olefin polymer 30-50 parts and slipping agent, and linea low density alkenes are total to
Polymers 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 processing is carried out to layers of material；
By upper epidermis, two outer core layers, inner sandwich layer and layer respectively by five extruders, and pass through five-layer co-squeezing mould
Head is extruded into pipe, and pipe cooling and shaping are handled, wherein, the temperature of extruder corresponding to the upper epidermis and layer
It it is 185~195 DEG C, the temperature of extruder corresponding to two outer core layers and inner sandwich layer is 180~200 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；
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 the thin laminated film of polyolefin biaxial tension to point splitting processing.
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.The thin laminated film of polyolefin biaxial tension produced using this programme using effect and biography on high-speed sealing automatic packaging machine
The heat-sealing POF products of system are compared, with heat-sealing temperature is low, heat sealable temperature is wide, with the smooth characteristic of heat, produced with the present invention
Film can guarantee that preferable tear resistance with preferable smoothness, hot smoothness and contractive effect, larger elongation,
Can improve in high-speed packaging because excessive velocities cause film to be pulled off the problem of, to improve the performance of film.
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.
The shrinkage factor of general shrink film is bigger at present, and contractive effect is better, but shrink film can be softer, it is easy to self-adhesion occurs
Phenomenon, Kekelé structure count is unstable, causes production to shut down when serious, packaging speed is produced a very large impact.Packaging speed is faster, to thin
Film mechanical property requirements and hot smoothness are also higher, and the mechanical performance of film and hot smoothness are low, easily cause film easily to draw
The problem of disconnected.Obtained by long-term practice, hot smoothness and shrinkage are two important parameters of laminated film.Inventor
By long-term production practices and multiple experiment repeatedly, devise it is a kind of simultaneously with thermal contraction performance it is more excellent, with hot
The scheme of the thin laminated film of polyolefin biaxial tension of smooth 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, position
Inner sandwich layer and the laminate of layer five between two outer core layers；
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；
Hot 2~6 parts of slipping agent；
Two layers of outer core layer is prepared by following component：
Linea low density alkenes are copolymerized 69 parts of 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 is copolymerized 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, upper epidermis, two outer core layers, inner sandwich layer and the following table of the thin laminated film of polyolefin biaxial tension
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）Have two layers, C layers（Inner sandwich layer）Thickness be all higher than A layers（Upper epidermis）, B layers（Outside
Sandwich layer）And C layers（Layer）Thickness.And the main material of B layers be DOWLEX2045G linea low densities vinyl copolymer,
Elastomeric EVA ethylene-vinyl acetate copolymers or 4203 extremely-low density olefin polymers, the main material of C layers are
DOWLEX2045G linea low densities vinyl copolymer, 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
It olefin polymer, metallocene olefin polymerization thing and propylene copolymers, can reach 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 oleamide, erucamide slip agent and oleamide, any in 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/ cm3.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 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 polyolefin biaxial tension is
0.15~0.25, wherein, 0.15,0.20,0.25 is preferred value.The thin laminated film of 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 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 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 be 10~
30um, it is too thick, cost can be increased, it is too thin, the quality of vermicelli film can be influenceed.
In embodiments of the invention, the preparation method of the thin laminated film of polyolefin biaxial tension, comprise the following steps：
Advance 80~90 parts of mixture propylene copolymers, 6~8 parts of anti-blocking agent, 2~6 parts of slipping agent, hot slipping agent 2~6
The upper epidermis and layer of part, and mixture linea low density vinyl copolymer 48.5-69 parts, ethylene-vinyl acetate copolymer
Or two outer core layers of 1~1.5 part of extremely-low density olefin polymer 30-50 parts and slipping agent, and linea low density alkenes are total to
Polymers 43.5-64 parts, extremely-low density olefin polymer 30-40 parts, metallocene olefin polymerization thing 5-15 parts and slipping agent 1~1.5
The inner sandwich layer of part, and dispersed processing is carried out to layers of material；
By upper epidermis, two outer core layers, inner sandwich layer and layer respectively by five extruders, and pass through five-layer co-squeezing mould
Head is extruded into pipe, and pipe cooling and shaping are handled, wherein, the temperature of extruder corresponding to the upper epidermis and layer
It it is 185~195 DEG C, the temperature of extruder corresponding to two outer core layers and inner sandwich layer is 180~200 DEG C；Preferably, 185
DEG C, 190 DEG C, 195 DEG C be extruder temperature corresponding to upper epidermis and layer preferred value.180 DEG C, 190 DEG C, 200 DEG C
For the preferred value of extruder temperature corresponding to outer sandwich layer and inner sandwich layer.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 the thin laminated film of polyolefin biaxial tension to point splitting processing.Should
In step, to dividing the thin laminated film of polyolefin biaxial tension after splitting to cut into finished product after winding, solidifying.By above-mentioned
The parameters of the thin laminated film of polyolefin biaxial tension refer to table 2 made from method.
Table 2
It can must find out from table 2, the thin laminated film of polyolefin biaxial tension for thering is such scheme to prepare, at least seal
Three temperature, elongation at break parameter, friction system aspects all have the advantages of being better than prior art film.Require emphasis
It is 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, the thin laminated film of polyolefin biaxial tension of technical scheme production, both with good opening
Property, higher tear resistance and mechanical performance, meet high-speed packaging demand；There is hot smoothness simultaneously, at high temperature with one
Fixed slippery.Effect is used on high-speed sealing automatic packaging machine using the thin laminated film of polyolefin biaxial tension of this programme production
Fruit is compared with traditional heat-sealing POF products, with transparency is high, resistance to tearing is good and with hot smooth characteristic, sent out with this
The film of open-birth production can guarantee that preferably anti-with preferable smoothness, hot smoothness and contractive effect, larger elongation
Lancinating, can improve in high-speed packaging because excessive velocities cause film to be pulled off the problem of, to improve the performance of film.
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 (7)
- A kind of 1. thin laminated film of polyolefin biaxial tension, it is characterised in that the thin laminated film bag of 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：Two layers of 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 is prepared by following component：Wherein, the density of the extremely-low density olefin polymer is 0.880~0.912g/cm3；The preparation method of the thin laminated film of polyolefin biaxial tension comprises the following steps：Advance 2~6 parts of 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 the copolymerization of linea low density alkenes 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 processing is carried out to layers of material；By upper epidermis, two outer core layers, inner sandwich layer and layer respectively by five extruders, and squeezed by five-layer co-squeezing die head Go out to form pipe, and pipe cooling and shaping are handled, wherein, the temperature of extruder is corresponding to the upper epidermis and layer 185~195 DEG C, the temperature of extruder corresponding to two outer core layers and inner sandwich layer is 180~200 DEG C；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 the thin laminated film of polyolefin biaxial tension to point splitting processing.
- 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 polyolefin biaxial tension Skin-friction coefficient of the thin laminated film at a temperature of 25 DEG C is 0.07~0.35.
- 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 55 DEG C is 0.15~0.35.
- 6. the thin laminated film of polyolefin biaxial tension as described in any one of claim 1 to 5, 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.
- 7. the thin laminated film of polyolefin biaxial tension as described in any one of claim 1 to 5, it is characterised in that the polyene The gross thickness of the thin laminated film of hydrocarbon biaxial tension is 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.
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| 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 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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