CN106739329A - A kind of novel multi-layer co-extrusion graining film and preparation method thereof - Google Patents

A kind of novel multi-layer co-extrusion graining film and preparation method thereof Download PDF

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Publication number
CN106739329A
CN106739329A CN201611031061.XA CN201611031061A CN106739329A CN 106739329 A CN106739329 A CN 106739329A CN 201611031061 A CN201611031061 A CN 201611031061A CN 106739329 A CN106739329 A CN 106739329A
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layers
layer
lldpe
film
10min
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CN106739329B (en
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李洪河
雷伟
黄新意
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DONGGUAN BOCHEN PLASTIC TECHNOLOGY Co Ltd
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DONGGUAN BOCHEN PLASTIC TECHNOLOGY Co Ltd
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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
    • 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
    • B29C48/002—Combinations of extrusion moulding with other shaping operations combined with surface shaping
    • 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
    • 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
    • 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
    • B32B27/34—Layered products comprising a layer of synthetic resin comprising polyamides
    • 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
    • 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
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/92704—Temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • 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
    • B32B2307/306—Resistant to heat
    • 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
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/41—Opaque
    • 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
    • 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
    • B32B2307/724—Permeability to gases, adsorption
    • B32B2307/7242—Non-permeable

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

The invention provides a kind of novel multi-layer co-extrusion graining film and preparation method thereof, the film successively by the first PA layers, second bond PE layer, the 3rd EVOH or the 3rd PA layers, PE layers of the 4th bonding and the 5th PE layers constitute.The five-layer co-squeezing film, with high water resistance energy and oxygen resistance high, good sealing effect, also with preferable tensile strength, heat-resisting, cold-resistant, photophobism, barrier and chemical stability, vdiverse in function, low cost；And bag of the invention is processed by using environment-friendly materials co-extrusion, no solvent residue harm is especially suitable for residential use.

Description

A kind of novel multi-layer co-extrusion graining film and preparation method thereof
Technical field
The present invention relates to thin film technique field, in particular it relates to a kind of novel multi-layer co-extrusion graining film and preparation method thereof.
Background technology
The material of existing vacuum bag is typically all monolayer plastic structure, and shaky, poor air-tightness is short several after vacuumizing My god, even a few houres with regard to gas leakage, do not apply to.And the poor-performing of monolayer plastic structure endurance, it is easy to breakage, it is impossible to Meet consumer demand.
The content of the invention
In order to overcome the deficiencies in the prior art, the invention provides a kind of novel multi-layer co-extrusion graining film and its preparation side Method, the novel multi-layer co-extrusion graining film, with high water resistance energy and oxygen resistance high, good sealing effect, also with preferable Tensile strength, heat-resisting, cold-resistant, photophobism, barrier and chemical stability, vdiverse in function, low cost；And bag of the invention is logical Cross using the processing of environment-friendly materials co-extrusion, no solvent residue harm is especially suitable for residential use.
A kind of novel multi-layer co-extrusion graining film, the film successively by the first PA layers, second bond PE layers, the 3rd EVOH or 3rd PA layers, the 4th bond PE layer and the 5th PE layers constitute.
It is preferred that the described first PA layers and the 3rd PA layer of raw material is melt temperature for 230-260 DEG C, density are 1.08- 1.18g/cm3Nylon.The nylon of above-mentioned melt temperature and density assigns the 3rd PA layers of preferable barrier property.
Preferably, PE layers of second bonding and the described 4th raw material for bonding PE layers include that weight ratio is 0.8-1.2:1 The 3rd LLDPE and the 4th LLDPE.It is of the invention second bond PE layer and the 4th bond PE layer by use the 3rd LLDPE with 4th LLDPE is used as raw material, and it is 0.8-1.2 to control its weight ratio:1, with good solvent-free bonding, and strengthen puncture resistant Performance.
Preferably, the 3rd LLDPE is melt index for 1.5-3.5g/10min, density are 0.914-0.922g/cm3 Linear low density polyethylene (LLDPE).4th LLDPE is melt index for 1.5-2.5g/10min, density are 0.916- 0.924g/cm3Linear low density polyethylene (LLDPE).The present invention is from above-mentioned melt index and the 3rd LLDPE and the 4th of density LLDPE, with softening temperature and melt temperature higher, also with intensity is big, good toughness, big, the heat-resisting, cold resistance of rigidity it is good etc. The performances such as advantage, and good environmental stress crack resistance, impact strength, tear-resistant intensity.
Preferably, the raw material of the 3rd evoh layer is melt index for 3-8g/10min, density are 1.10-1.19g/ cm3Ethylene-vinyl alcohol copolymer, with preferable barrier property.
Preferably, the described 5th PE layers raw material include weight ratio be 3-5：4-6：1 LDPE, MLLDPE and the 5th LLDPE.Described 5th PE layers have low temperature sealing property and paracentesis resistance energy.
It is further preferable that the LDPE is melt index for 1.5-2.5g/10min, density are 0.918-0.928g/cm3 Low density polyethylene (LDPE).The LDPE of above-mentioned melt index and density has softening point relatively low, is melting more than softening point, its hot melt Very well, flexibility is good for connecing property, moulding processability, toughness, lower temperature resistance very well, can at -60 DEG C~-80 DEG C work Make, electrical insulating property is outstanding (especially high-frequency insulation), and chemical stability is outstanding.
The MLLDPE is melt index for 0.6-1g/10min, density are 0.902-0.912g/cm3Metallocene linear Low density polyethylene (LDPE).The MLLDPE of above-mentioned melt index and density has dart impact strength higher, tearing strength, heat-sealing strong Degree and prominent optical property.
5th LLDPE is melt index for 1.5-2.5g/10min, density are 0.912-0.922g/cm3Line style Low density polyethylene (LDPE).5th LLDP of above-mentioned melt index and density has softening temperature and melt temperature higher, there is intensity Greatly, good toughness, rigidity big, heat-resisting, cold resistance it is good the advantages of, also with good environmental stress crack resistance, impact strength, The performances such as tear-resistant intensity.
Five layers of raw material are separately added into five layers of extruder and are melted by the preparation method of the novel multi-layer co-extrusion graining film Melt, plastify, extrude, be then 1 in blow-up ratio：1-3, temperature be 180-260 DEG C under conditions of blown film is carried out by inflation film manufacturing machine, then Cooled down through lower blowing water cold process, the novel multi-layer co-extrusion graining film is obtained.
It is preferred that the novel multi-layer co-extrusion graining film is also further across roll squeezer roll-in, set on the roll squeezer There is decorative pattern, so as to form corresponding decorative pattern on the product after roll-in.
It is preferred that the temperature of five layers of extruder is respectively：Described first PA layers processing temperature be 230-260 DEG C, Described second processing temperature for bonding PE layer is 180-230 DEG C, the 3rd evoh layer or the described 3rd PA layers of processing temperature It it is 230-260 DEG C, the described 4th processing temperature for bonding PE layer is 180-230 DEG C, and the described 5th PE layers of processing temperature is 180-230℃。
The vacuum packaging bag of film preparation is embossed with above-mentioned novel multi-layer co-extrusion.
Novel multi-layer co-extrusion graining film of the present invention, with high water resistance energy and oxygen resistance high, good sealing effect is gone back With preferable tensile strength, heat-resisting, cold-resistant, photophobism, barrier and chemical stability, vdiverse in function, low cost；And this hair Bright bag is processed by using environment-friendly materials co-extrusion, no solvent residue harm, is especially suitable for residential use.
Brief description of the drawings：
Fig. 1 is the structural representation of vacuum packaging bag of the present invention.
Fig. 2 is the structural representation of novel multi-layer co-extrusion graining film used by vacuum packaging bag of the present invention.
Specific embodiment
In order that goal of the invention of the invention, technical scheme and technique effect become more apparent, with reference to specific reality The present invention is described further to apply mode.It should be understood that specific embodiment described herein and relevant drawings, are only used for solution The present invention is released, is not intended to limit the present invention.
Embodiment one：
A kind of novel multi-layer co-extrusion graining film, the film successively by the first PA layers, second bond PE layers, the 3rd EVOH, 4th bonds PE layers and the 5th PE layers of composition.
Described first PA layers of raw material is melt temperature for 230-260 DEG C, density are 1.08g/cm3Nylon.
Described second bonds PE layers and the described 4th raw material for bonding PE layers includes that weight ratio is 0.8:1 the 3rd LLDPE With the 4th LLDPE.3rd LLDPE is melt index for 1.5g/10min, density are 0.914g/cm3Linear, low density Polyethylene；4th LLDPE is melt index for 1.5g/10min, density are 0.916g/cm3The poly- second of linear, low density Alkene.
The raw material of the 3rd evoh layer is melt index for 5.7g/10min, density are 1.17g/cm3Ethylene-vinyl Alcohol copolymer.
Described 5th PE layers raw material include weight ratio be 3：6：1 LDPE, MLLDPE and the 5th LLDPE.The LDPE It is melt index for 2.0g/10min, density are 0.918g/cm3Low density polyethylene (LDPE)；The MLLDPE is that melt index is 0.9g/10min, density are 0.902g/cm3Metallocene linear low density polyethylene；5th LLDPE is that melt index is 2.0g/10min, density are 0.920/cm3Linear low density polyethylene (LLDPE).
Five layers of raw material are separately added into five layers of extruder and are melted by the preparation method of described novel multi-layer co-extrusion graining film Melt, plastify, extrude, be then 1 in blow-up ratio：3, temperature is to carry out blown film by inflation film manufacturing machine under conditions of 200 DEG C, then passes through down and blow Water cooling is cooled down, and the novel multi-layer co-extrusion graining film is obtained.
Described first PA layers processing temperature be 230 DEG C, it is described second bond PE layer processing temperature be 230 DEG C, it is described The processing temperature of the 3rd evoh layer is 260 DEG C, and the described 4th processing temperature for bonding PE layer is 180 DEG C, described 5th PE layers Processing temperature is 200 DEG C.
Embodiment two：
A kind of novel multi-layer co-extrusion graining film, the film successively by the first PA layers, second bond PE layers, the 3rd EVOH, 4th bonds PE layers and the 5th PE layers of composition.
Described first PA layers of raw material is melt temperature for 250 DEG C, density are 1.18g/cm3Nylon.
Described second bonds PE layers and the described 4th raw material for bonding PE layers includes that weight ratio is 1.0:1 the 3rd LLDPE With the 4th LLDPE.3rd LLDPE is melt index for 2.0g/10min, density are 0.922g/cm3Linear, low density Polyethylene；4th LLDPE is melt index for 2.0g/10min, density are 0.920g/cm3The poly- second of linear, low density Alkene.
The raw material of the 3rd evoh layer is melt index for 5.7g/10min, density are 1.15g/cm3Ethylene-vinyl Alcohol copolymer.
Described 5th PE layers raw material include weight ratio be 5：4：1 LDPE, MLLDPE and the 5th LLDPE.The LDPE It is melt index for 2.0g/10min, density are 0.922g/cm3Low density polyethylene (LDPE)；The MLLDPE is that melt index is 0.9g/10min, density are 0.912g/cm3Metallocene linear low density polyethylene；5th LLDPE is that melt index is 2.0g/10min, density are 0.920g/cm3Linear low density polyethylene (LLDPE).
Five layers of raw material are separately added into five layers of extruder and are melted by the preparation method of described novel multi-layer co-extrusion graining film Melt, plastify, extrude, be then 1 in blow-up ratio：1-3, temperature be 180-260 DEG C under conditions of blown film is carried out by inflation film manufacturing machine, then Cooled down through lower blowing water cold process, the novel multi-layer co-extrusion graining film is obtained.
Described first PA layers processing temperature be 240 DEG C, it is described second bond PE layer processing temperature be 200 DEG C, it is described The processing temperature of the 3rd evoh layer is 250 DEG C, and the described 4th processing temperature for bonding PE layer is 230 DEG C, described 5th PE layers Processing temperature is 230 DEG C.
Embodiment three
A kind of novel multi-layer co-extrusion graining film, the film successively by the first PA layers, second bond PE layers, the 3rd EVOH, 4th bonds PE layers and the 5th PE layers of composition.
Described first PA layers of raw material is melt temperature for 235 DEG C, density are 1.12g/cm3Nylon.
Described second bonds PE layers and the described 4th raw material for bonding PE layers includes that weight ratio is 1.2:1 the 3rd LLDPE With the 4th LLDPE.3rd LLDPE is melt index for 2.5g/10min, density are 0.920g/cm3Linear, low density Polyethylene；4th LLDPE is melt index for 2.0g/10min, density are 0.924g/cm3The poly- second of linear, low density Alkene.
The raw material of the 3rd evoh layer is melt index for 5g/10min, density are 1.19g/cm3Ethylene-vinyl alcohol Copolymer.
Described 5th PE layers raw material include weight ratio be 3：5：1 LDPE, MLLDPE and the 5th LLDPE.The LDPE It is melt index for 1.8g/10min, density are 0.925g/cm3Low density polyethylene (LDPE)；The MLLDPE is that melt index is 1g/10min, density are 0.910g/cm3Metallocene linear low density polyethylene；5th LLDPE is that melt index is 1g/10min, density are 0.948g/cm3Linear low density polyethylene (LLDPE).
Five layers of raw material are separately added into five layers of extruder and are melted by the preparation method of described novel multi-layer co-extrusion graining film Melt, plastify, extrude, be then 1 in blow-up ratio：2, temperature is to carry out blown film by inflation film manufacturing machine under conditions of 180 DEG C, then passes through down and blow Water cooling is cooled down, and by roll squeezer roll-in, decorative pattern is provided with the roll squeezer, so as to form correspondence on the product after roll-in Decorative pattern, be obtained the novel multi-layer co-extrusion graining film.
Described first PA layers processing temperature be 260 DEG C, it is described second bond PE layer processing temperature be 230 DEG C, it is described The processing temperature of the 3rd evoh layer is 240 DEG C, and the described 4th processing temperature for bonding PE layer is 220 DEG C, described 5th PE layers Processing temperature is 190 DEG C.
Example IV
A kind of novel multi-layer co-extrusion graining film, the film successively by the first PA layers, second bond PE layers, the 3rd EVOH, 4th bonds PE layers and the 5th PE layers of composition.
Described first PA layers of raw material is melt temperature for 230 DEG C, density are 1.12g/cm3Nylon.
Described second bonds PE layers and the described 4th raw material for bonding PE layers includes that weight ratio is 0.9:1 the 3rd LLDPE With the 4th LLDPE.3rd LLDPE is melt index for 3.0g/10min, density are 0.918g/cm3Linear, low density Polyethylene；4th LLDPE is melt index for 1.8g/10min, density are 0.916g/cm3The poly- second of linear, low density Alkene.
The raw material of the 3rd evoh layer is melt index for 3.5g/10min, density are 1.18g/cm3Ethylene-vinyl Alcohol copolymer.
Described 5th PE layers raw material include weight ratio be 4：4：1 LDPE, MLLDPE and the 5th LLDPE.The LDPE It is melt index for 2.5g/10min, density are 0.923g/cm3Low density polyethylene (LDPE)；The MLLDPE is that melt index is 0.6g/10min, density are 0.908g/cm3Metallocene linear low density polyethylene；5th LLDPE is that melt index is 0.6g/10min, density are 0.945g/cm3Linear low density polyethylene (LLDPE).
Five layers of raw material are separately added into five layers of extruder and are melted by the preparation method of described novel multi-layer co-extrusion graining film Melt, plastify, extrude, be then 1 in blow-up ratio：3, temperature is to carry out blown film by inflation film manufacturing machine under conditions of 190 DEG C, then passes through down and blow Water cooling is cooled down, and by roll squeezer roll-in, decorative pattern is provided with the roll squeezer, so as to form correspondence on the product after roll-in Decorative pattern, be obtained the novel multi-layer co-extrusion graining film.
Described first PA layers processing temperature be 240 DEG C, it is described second bond PE layer processing temperature be 200 DEG C, it is described The processing temperature of the 3rd evoh layer is 260 DEG C, and the described 4th processing temperature for bonding PE layer is 200 DEG C, described 5th PE layers Processing temperature is 230 DEG C.
Embodiment five
A kind of novel multi-layer co-extrusion graining film, the film successively by the first PA layers, second bond PE layers, the 3rd EVOH, 4th bonds PE layers and the 5th PE layers of composition.
Described first PA layers of raw material is melt temperature for 240 DEG C, density are 1.12g/cm3Nylon.
Described second bonds PE layers and the described 4th raw material for bonding PE layers includes that weight ratio is 1.0:1 the 3rd LLDPE With the 4th LLDPE.3rd LLDPE is melt index for 2.0g/10min, density are 0.914g/cm3Linear, low density Polyethylene；4th LLDPE is melt index for 2.5g/10min, density are 0.924g/cm3The poly- second of linear, low density Alkene.
The raw material of the 3rd evoh layer is melt index for 4g/10min, density are 1.16g/cm3Ethylene-vinyl alcohol Copolymer.
Described 5th PE layers raw material include weight ratio be 5：4-6：1 LDPE, MLLDPE and the 5th LLDPE.It is described LDPE is melt index for 2.0g/10min, density are 0.925g/cm3Low density polyethylene (LDPE)；The MLLDPE is that melting refers to Number is 0.8g/10min, density is 0.910g/cm3Metallocene linear low density polyethylene；5th LLDPE is that melting refers to Number is 0.8g/10min, density is 0.946g/cm3Linear low density polyethylene (LLDPE).
Five layers of raw material are separately added into five layers of extruder and are melted by the preparation method of described novel multi-layer co-extrusion graining film Melt, plastify, extrude, be then 1 in blow-up ratio：4, temperature is to carry out blown film by inflation film manufacturing machine under conditions of 200 DEG C, then passes through down and blow Water cooling is cooled down, and by roll squeezer roll-in, decorative pattern is provided with the roll squeezer, so as to form correspondence on the product after roll-in Decorative pattern, be obtained the novel multi-layer co-extrusion graining film.
Described first PA layers processing temperature be 260 DEG C, it is described second bond PE layer processing temperature be 180 DEG C, it is described The processing temperature of the 3rd evoh layer is 230 DEG C, and the described 4th processing temperature for bonding PE layer is 230 DEG C, described 5th PE layers Processing temperature is 220 DEG C.
Embodiment six
A kind of novel multi-layer co-extrusion graining film, the film successively by the first PA layers, second bond PE layers, the 3rd PA layers, 4th bonds PE layers and the 5th PE layers of composition.
Described first PA layers of raw material is melt temperature for 240 DEG C, density are 1.08g/cm3Nylon.
Described second bonds PE layers and the described 4th raw material for bonding PE layers includes that weight ratio is 1.0:1 the 3rd LLDPE With the 4th LLDPE.3rd LLDPE is melt index for 2.0g/10min, density are 0.914g/cm3Linear, low density Polyethylene；4th LLDPE is melt index for 2.5g/10min, density are 0.924g/cm3The poly- second of linear, low density Alkene.
Described 3rd PA layers of raw material is melt temperature for 210 DEG C, density are 1.18g/cm3Nylon.Above-mentioned melting temperature The nylon of degree and density assigns the 3rd PA layers of preferable barrier property.
Described 5th PE layers raw material include weight ratio be 5：4-6：1 LDPE, MLLDPE and the 5th LLDPE.It is described LDPE is melt index for 2.0g/10min, density are 0.925g/cm3Low density polyethylene (LDPE)；The MLLDPE is that melting refers to Number is 0.8g/10min, density is 0.910g/cm3Metallocene linear low density polyethylene；5th LLDPE is that melting refers to Number is 0.8g/10min, density is the linear low density polyethylene (LLDPE) of 0.946g/cm3.
Five layers of raw material are separately added into five layers of extruder and are melted by the preparation method of described novel multi-layer co-extrusion graining film Melt, plastify, extrude, be then 1 in blow-up ratio：4, temperature is to carry out blown film by inflation film manufacturing machine under conditions of 200 DEG C, then passes through down and blow Water cooling is cooled down, and by roll squeezer roll-in, decorative pattern is provided with the roll squeezer, so as to form correspondence on the product after roll-in Decorative pattern, be obtained the novel multi-layer co-extrusion graining film.
Described first PA layers processing temperature be 250 DEG C, it is described second bond PE layer processing temperature be 220 DEG C, it is described 3rd PA layers processing temperature be 260 DEG C, it is described 4th bond PE layer processing temperature be 180 DEG C, the described 5th PE layers add Work temperature is 210 DEG C.
Embodiment seven
A kind of novel multi-layer co-extrusion graining film, the film successively by the first PA layers, second bond PE layers, the 3rd PA layers, 4th bonds PE layers and the 5th PE layers of composition.
Described first PA layers of raw material is melt temperature for 250 DEG C, density are 1.18g/cm3Nylon.
Described second bonds PE layers and the described 4th raw material for bonding PE layers includes that weight ratio is 1.0:1 the 3rd LLDPE With the 4th LLDPE.3rd LLDPE is melt index for 2.0g/10min, density are 0.914g/cm3Linear, low density Polyethylene；4th LLDPE is melt index for 2.5g/10min, density are 0.924g/cm3The poly- second of linear, low density Alkene.
Described 3rd PA layers of raw material is melt temperature for 230 DEG C, density are 1.10g/cm3Nylon.Above-mentioned melting temperature The nylon of degree and density assigns the 3rd PA layers of preferable barrier property.
Described 5th PE layers raw material include weight ratio be 5：4-6：1 LDPE, MLLDPE and the 5th LLDPE.It is described LDPE is melt index for 2.0g/10min, density are 0.925g/cm3Low density polyethylene (LDPE)；The MLLDPE is that melting refers to Number is 0.8g/10min, density is 0.910g/cm3Metallocene linear low density polyethylene；5th LLDPE is that melting refers to Number is 0.8g/10min, density is 0.946g/cm3Linear low density polyethylene (LLDPE).
Five layers of raw material are separately added into five layers of extruder and are melted by the preparation method of described novel multi-layer co-extrusion graining film Melt, plastify, extrude, be then 1 in blow-up ratio：4, temperature is to carry out blown film by inflation film manufacturing machine under conditions of 200 DEG C, then passes through down and blow Water cooling is cooled down, and by roll squeezer roll-in, decorative pattern is provided with the roll squeezer, so as to form correspondence on the product after roll-in Decorative pattern, be obtained the novel multi-layer co-extrusion graining film.
Described first PA layers processing temperature be 260 DEG C, it is described second bond PE layer processing temperature be 180 DEG C, it is described 3rd PA layers processing temperature be 240 DEG C, it is described 4th bond PE layer processing temperature be 200 DEG C, the described 5th PE layers add Work temperature is 230 DEG C.
Embodiment eight
A kind of novel multi-layer co-extrusion graining film, the film successively by the first PA layers, second bond PE layers, the 3rd PA layers, 4th bonds PE layers and the 5th PE layers of composition.
Described first PA layers be melt temperature for 230 DEG C, density are 1.08g/cm3Nylon.
Described second bonds PE layers and the described 4th raw material for bonding PE layers includes that weight ratio is 1.0:1 the 3rd LLDPE With the 4th LLDPE.3rd LLDPE is melt index for 2.0g/10min, density are 0.914g/cm3Linear, low density Polyethylene；4th LLDPE is melt index for 2.5g/10min, density are 0.924g/cm3The poly- second of linear, low density Alkene.
Described 3rd PA layers of raw material be melt temperature be 230 DEG C, density be the nylon of 1.18g/cm3.Above-mentioned melting temperature The nylon of degree and density assigns the 3rd PA layers of preferable barrier property.
Described 5th PE layers raw material include weight ratio be 5：4-6：1 LDPE, MLLDPE and the 5th LLDPE.It is described LDPE is melt index for 2.0g/10min, density are 0.925g/cm3Low density polyethylene (LDPE)；The MLLDPE is that melting refers to Number is 0.8g/10min, density is 0.910g/cm3Metallocene linear low density polyethylene；5th LLDPE is that melting refers to Number is 0.8g/10min, density is 0.946g/cm3Linear low density polyethylene (LLDPE).
Five layers of raw material are separately added into five layers of extruder and are melted by the preparation method of described novel multi-layer co-extrusion graining film Melt, plastify, extrude, be then 1 in blow-up ratio：4, temperature is to carry out blown film by inflation film manufacturing machine under conditions of 200 DEG C, then passes through down and blow Water cooling is cooled down, and by roll squeezer roll-in, decorative pattern is provided with the roll squeezer, so as to form correspondence on the product after roll-in Decorative pattern, be obtained the novel multi-layer co-extrusion graining film.
Described first PA layers processing temperature be 230 DEG C, it is described second bond PE layer processing temperature be 200 DEG C, it is described 3rd PA layers processing temperature be 260 DEG C, it is described 4th bond PE layer processing temperature be 230 DEG C, the described 5th PE layers add Work temperature is 180 DEG C.
Embodiment nine
Referring to Figures 1 and 2, the vacuum packaging bag of film preparation is embossed with above-mentioned novel multi-layer co-extrusion.The vacuum packaging The madial wall of the one side of bag is provided with striped and/or decorative pattern 1；The striped and/or the decorative pattern are forming air guide groove 2.Institute The bag 1 of vacuum packaging bag is stated for novel multi-layer co-extrusion graining film, the novel multi-layer co-extrusion graining film from outer layer to internal layer according to It is secondary be the first PE layers 3, second bond PE layer the 4, the 3rd EVOH or PA layers the 5, the 4th PE layers 6 and the 5th PE layers 7 of bonding.
Above content is to combine specific preferred embodiment further description made for the present invention, it is impossible to assert Specific implementation of the invention is confined to these explanations.For general technical staff of the technical field of the invention, On the premise of not departing from present inventive concept, its framework form can be flexible and changeable, can be with subseries product.Simply make some Simple deduction or replace, should all be considered as belonging to the scope of patent protection that the claims of the present invention by being submitted to determine.

Claims (11)

1. a kind of five-layer co-squeezing film, it is characterised in that the film successively by the first PA layers, second bond PE layers, the 3rd EVOH or the 3rd PA layers, the 4th bond PE layer and the 5th PE layers constitute.
2. five-layer co-squeezing film as claimed in claim 1, it is characterised in that the described first PA layers and the 3rd PA layers of raw material be The nylon that melt temperature is 220-250 DEG C, density is 1.08-1.18g/cm3.
3. five-layer co-squeezing film as claimed in claim 1, it is characterised in that described second bonds PE layer and the described 4th bonding PE layers of raw material includes that weight ratio is 0.8-1.2:1 the 3rd LLDPE and the 4th LLDPE.
4. five-layer co-squeezing film as claimed in claim 3, it is characterised in that the 3rd LLDPE is that melt index is 1.5- 2.5g/10min, density are 0.914-0.922g/cm3Linear low density polyethylene (LLDPE)；4th LLDPE is that melt index is 1.5-2.5g/10min, density are 0.916-0.924g/cm3Linear low density polyethylene (LLDPE).
5. five-layer co-squeezing film as claimed in claim 1, it is characterised in that the raw material of the 3rd evoh layer is melt index For 3-8g/10min, density are 1.10-1.19g/cm3Ethylene-vinyl alcohol copolymer.
6. five-layer co-squeezing film as claimed in claim 1, it is characterised in that the described 5th PE layers of raw material is including weight ratio 3-5：4-6：1 LDPE, MLLDPE and the 5th LLDPE.
7. five-layer co-squeezing film as claimed in claim 6, it is characterised in that the LDPE is that melt index is 1.5-2.5g/ 10min, density are 0.918-0.928g/cm3Low density polyethylene (LDPE)；The MLLDPE is that melt index is 0.6-1g/ 10min, density are 0.902-0.912g/cm3Metallocene linear low density polyethylene；5th LLDPE is melt index For 1.5-2.5g/10min, density are 0.914-0.922g/cm3Linear low density polyethylene (LLDPE).
8. the preparation method of the five-layer co-squeezing film as described in claim any one of 1-7, it is characterised in that by five layers of raw material point Not Jia Ru five layers of extruder melted, plastified, extruded, then blow-up ratio be 1：1-3, temperature is 180-260 DEG C of condition Blown film is carried out by inflation film manufacturing machine down, then is cooled down through lower blowing water cold process, the five-layer co-squeezing film is obtained.
9. the preparation method of five-layer co-squeezing film as claimed in claim 8, it is characterised in that the five-layer co-squeezing film also enters One step is embossed by embossing machine, and patterned roll is provided with the embossing machine, so as to form corresponding flower on the product after roll-in Line.
10. the preparation method of five-layer co-squeezing film as claimed in claim 9, it is characterised in that the temperature of five layers of extruder Degree is respectively：Described first PA layers processing temperature be 230-260 DEG C, the described 2nd PE layer processing temperature be 180-230 DEG C, 3rd EVOH or described 3rd PA layers processing temperature be 230-260 DEG C, the described 4th PE layer processing temperature be 180-230 DEG C, the described 5th PE layers processing temperature be 180-230 DEG C.
11. vacuum packaging bags for using the five-layer co-squeezing film preparation described in claim any one of 1-10.
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