CN104708876A - Anti-stretching film and packaging bag - Google Patents
Anti-stretching film and packaging bag Download PDFInfo
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- CN104708876A CN104708876A CN201510136344.XA CN201510136344A CN104708876A CN 104708876 A CN104708876 A CN 104708876A CN 201510136344 A CN201510136344 A CN 201510136344A CN 104708876 A CN104708876 A CN 104708876A
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- layer
- stretch
- proof film
- present
- hot sealing
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/18—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
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
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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
- B65D29/00—Sacks or like containers made of fabrics; Flexible containers of open-work, e.g. net-like construction
- B65D29/02—Sacks with laminated or multiple walls
Abstract
The invention provides an anti-stretching film. The anti-stretching film comprises a corona layer, a core layer and a heat sealing layer, wherein the corona layer is made of block copolymerized polypropylene; the core layer is arranged on the surface of the corona layer, and is made of binary copolymerized polypropylene and a toughening modifying agent; the heat sealing layer is arranged on the surface of the core layer; and the heat sealing layer is made of block copolymerized polypropylene, binary copolymerized polypropylene, an opening agent and a smoothing agent. The block copolymerized polypropylene in the anti-stretching film can be used for improving the flexibility of a thin film and the toughening modifying agent in the core layer can be used for further improving the flexibility of the thin film; and the materials of the heat sealing layer are matched so that the anti-stretching film has a relatively good anti-stretching performance. The invention further provides a packaging bag comprising the anti-stretching film. The packaging bag provided by the invention comprises the anti-stretching film so that the packaging bag has relatively good sealing strength and anti-tearing performance.
Description
Technical field
The present invention relates to packaging film technical field, particularly relate to a kind of stretch-proof film and packaging bag.
Background technology
Packaging film is generally extruded by the mixing of different plastic resins and is prepared from.Packaging film has lot of advantages, if adapt to the commodity of various shape, increases the eye appeal of product; Make packaged commodity have wholesomeness, sealing, dust-proof resistance is wet; Packaging film also has shockproof hitting property, protecting against shock, has good protective value; These advantages of packaging film make it in industry extensive uses such as foreign export, papermaking, five metals, plastics chemical industry, building materials, food medicine.
Application number be 201010498462.1 Chinese patent disclose a kind of composite package film, this composite package film comprises polyvinyl resin layer, polyether polyols with reduced unsaturation layer, the first tack coat between polyvinyl resin layer and polyether polyols with reduced unsaturation layer, bonding enhancement layer, the second tack coat between polyether polyols with reduced unsaturation layer and bonding enhancement layer.The polyvinyl resin that this composite package film top layer that prior art provides adopts the life-span long, the service life of packaging film can be extended, enhancement layer is added below polyether polyols with reduced unsaturation layer, this packaging film also can be used under the operating condition of high strength, although this composite package film that prior art provides has advantage in service life and working strength, but the stretch-proof poor-performing of this packaging film, limits its extensive use under stretching environment.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of stretch-proof film and packaging bag, stretch-proof film provided by the invention has good stretch-proof performance.
The invention provides a kind of stretch-proof film, comprising:
Corona layer, the material of described corona layer is block copolymerization polypropylene;
Be arranged on the sandwich layer on described corona layer surface, the material of described sandwich layer comprises binary copolymerization polypropylene and plasticized modifier;
Be arranged on the hot sealing layer of described core layer surface, the material of described hot sealing layer comprises block copolymerization polypropylene, binary copolymerization polypropylene, opening agent and slipping agent.
Preferably, the thickness of described stretch-proof film is 50 microns ~ 120 microns.
Preferably, the Thickness Ratio of described corona layer, sandwich layer and hot sealing layer is (10 ~ 25): (50 ~ 80): (10 ~ 25).
Preferably, in described sandwich layer, the mass ratio of binary copolymerization polypropylene and plasticized modifier is (4 ~ 9): 1.
Preferably, in described hot sealing layer, block copolymerization polypropylene and the polyacrylic mass ratio of binary copolymerization are 1:(4 ~ 8.5).
Preferably, the mass content of described opening agent in described hot sealing layer is 2000PPM ~ 2500PPM.
Preferably, the mass content of described slipping agent in described hot sealing layer is 3000PPM ~ 3500PPM.
Preferably, the elongation at break of described block copolymerization polypropylene is 450% ~ 550%.
Preferably, described plasticized modifier is thermoplastic elastomer (TPE).
Block copolymerization polypropylene in stretch-proof film corona layer provided by the invention can improve the pliability of film, plasticized modifier in sandwich layer can improve the pliability of film further, coordinate the material of hot sealing layer simultaneously, make stretch-proof film provided by the invention have good stretch-proof performance.Experimental result shows, the longitudinal fracture percentage elongation of stretch-proof film provided by the invention is 500% ~ 585%, and transverse breakage percentage elongation is 560% ~ 635%, stretch-proof better performances.
The invention provides a kind of packaging bag, comprise the stretch-proof film described in technique scheme.
Containing above-mentioned stretch-proof film in packaging bag provided by the invention, this packaging bag is made to have good tear resistance.Experimental result shows, the heat seal strength of packaging bag provided by the invention is 90N/15mm ~ 94N/15mm, and percentage elongation can reach 88% ~ 93%, has good sealing intensity and tear resistance.
Detailed description of the invention
Be clearly and completely described the technical scheme in the embodiment of the present invention below, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The invention provides a kind of stretch-proof film, comprising:
Corona layer, the material of described corona layer is block copolymerization polypropylene;
Be arranged on the sandwich layer on described corona layer surface, the material of described sandwich layer comprises binary copolymerization polypropylene and plasticized modifier;
Be arranged on the hot sealing layer of described core layer surface, the material of described hot sealing layer comprises block copolymerization polypropylene, binary copolymerization polypropylene, opening agent and slipping agent.
In an embodiment of the present invention, the thickness of described stretch-proof film is 50 microns ~ 120 microns; In other examples, the thickness of described stretch-proof film is 60 microns ~ 100 microns; In a further embodiment, the thickness of described stretch-proof film is 70 microns ~ 90 microns.In an embodiment of the present invention, the Thickness Ratio of described corona layer, sandwich layer and hot sealing layer is (10 ~ 25): (50 ~ 80): (10 ~ 25); In other examples, the Thickness Ratio of described corona layer, sandwich layer and hot sealing layer is (15 ~ 20): (60 ~ 70): (15 ~ 20).
In an embodiment of the present invention, the melt flow rate (MFR) of described block copolymerization polypropylene (block copolymerization PP) is 2g/min ~ 3g/min; In other examples, the melt flow rate (MFR) of described block copolymerization PP is 2.3g/min ~ 2.7g/min; In a further embodiment, the melt flow rate (MFR) of described block copolymerization PP is 2.5g/min.
In an embodiment of the present invention, the tensile yield strength of described block copolymerization PP is 250Kg/cm
2~ 350Kg/cm
2; In other examples, the tensile yield strength of described block copolymerization PP is 280Kg/cm
2~ 320Kg/cm
2; In a further embodiment, the tensile yield strength of described block copolymerization PP is 300Kg/cm
2.
In an embodiment of the present invention, the elongation at break of described block copolymerization PP is 450% ~ 550%; In other examples, the elongation at break of described block copolymerization PP is 480% ~ 520%; In a further embodiment, the elongation at break of described block copolymerization PP is 500%.
In an embodiment of the present invention, the bending modulus of described block copolymerization PP is 12000Kg/cm
2~ 14000Kg/cm
2; In other examples, the bending modulus of described block copolymerization PP is 12500Kg/cm
2~ 13500Kg/cm
2; In a further embodiment, the bending modulus of described block copolymerization PP is 13000Kg/cm
2.
In an embodiment of the present invention, described block copolymerization PP is 8Kg.cm/cm ~ 10Kg.cm/cm the impact strength of 23 DEG C; In other examples, described block copolymerization PP is 8.5Kg.cm/cm ~ 9.5Kg.cm/cm the impact strength of 23 DEG C; In a further embodiment, described block copolymerization PP is 9Kg.cm/cm the impact strength of 23 DEG C.
In an embodiment of the present invention, the Rockwell hardness of described block copolymerization PP is 75R ~ 85R; In other examples, the Rockwell hardness of described block copolymerization PP is 78R ~ 82R; In a further embodiment, the Rockwell hardness of described block copolymerization PP is 80R.
In an embodiment of the present invention, the Vicat softening point of described block copolymerization PP is 140 DEG C ~ 160 DEG C; In other examples, the Vicat softening point of described block copolymerization PP is 145 DEG C ~ 155 DEG C; In a further embodiment, the Vicat softening point of described block copolymerization PP is 150 DEG C.
In an embodiment of the present invention, the heat distortion temperature of described block copolymerization PP is 100 DEG C ~ 110 DEG C; In other examples, the heat distortion temperature of described block copolymerization PP is 103 DEG C ~ 106 DEG C; In a further embodiment, the heat distortion temperature of described block copolymerization PP is 105 DEG C.
The source of the present invention to described block copolymerization PP does not have special restriction, adopts the block copolymerization PP of mentioned kind well known to those skilled in the art, can be bought obtain, as adopted the product of J351F model by market.
In an embodiment of the present invention, the thickness of described corona layer can be 13 microns ~ 17 microns; In other examples, the thickness of described corona layer can be 14 microns ~ 16 microns; In a further embodiment, the thickness of described corona layer can be 15 microns.
Stretch-proof film provided by the invention comprises the sandwich layer being arranged on described corona layer surface, and the material of described sandwich layer comprises binary copolymerization polypropylene and plasticized modifier.In an embodiment of the present invention, the melt flow rate (MFR) of the binary copolymerization polypropylene (binary copolymerization PP) in sandwich layer can be 6.5g/10min ~ 10.5g/10min; In other examples, the melt flow rate (MFR) of the binary copolymerization PP in sandwich layer can be 7g/10min ~ 9g/10min; In a further embodiment, the melt flow rate (MFR) of the binary copolymerization PP in sandwich layer can be 8g/10min.
In an embodiment of the present invention, the mist degree of the binary copolymerization PP in sandwich layer can≤2.0%.In an embodiment of the present invention, the glossiness of the binary copolymerization PP in sandwich layer can >=86%.In an embodiment of the present invention, the tensile yield strength of the binary copolymerization PP in sandwich layer can >=25MPa.In an embodiment of the present invention, the bending modulus >=0.82GPa of the binary copolymerization PP in sandwich layer.In an embodiment of the present invention, the binary copolymerization PP in sandwich layer is at 23 DEG C of cantilever beam impact strength >=17.6J/m.In an embodiment of the present invention, the coefficient of friction of the binary copolymerization PP in sandwich layer can≤0.8%.
In an embodiment of the present invention, the binary copolymerization PP in sandwich layer is 29J/m ~ 30J/m at the cantilever beam impact strength (v-notch) of 23 DEG C; In other examples, the binary copolymerization PP in sandwich layer is 29.2J/m ~ 29.6J/m at the cantilever beam impact strength (v-notch) of 23 DEG C; In a further embodiment, the binary copolymerization PP in sandwich layer is 29.4J/m at the cantilever beam impact strength (v-notch) of 23 DEG C.
In an embodiment of the present invention, yellow colour index≤4 of the binary copolymerization PP in sandwich layer.In an embodiment of the present invention, ash content≤0.03% of the binary copolymerization PP in sandwich layer.In an embodiment of the present invention, the binary copolymerization PP in sandwich layer is 11/1520cm at the flake of 0.4mm
2~ 20/1520cm
2.In an embodiment of the present invention, the binary copolymerization PP in sandwich layer is 1.1/1520cm at the flake of 0.8mm
2~ 3/1520cm
2.In an embodiment of the present invention, the cleannes of the binary copolymerization PP in sandwich layer are 6 points/kilogram ~ 10 points/kilogram.
The source of the present invention to the binary copolymerization PP in sandwich layer does not have special restriction, adopts the binary copolymerization PP of mentioned kind well known to those skilled in the art, can be bought obtain, as adopted the product of F800E model by market.
In an embodiment of the present invention, described plasticized modifier can be thermoplastic elastomer (TPE); In other examples, described plasticized modifier can be olefinic copolymer; In a further embodiment, described plasticized modifier can for being end segment with polystyrene, taking Ethylene/Butylene as the linear three block copolymer of middle spring block or the in-situ polymerization thing of the ethene prepared by metallocene catalyst and octene.
In an embodiment of the present invention, the proportion of described plasticized modifier can be 0.8g/cm
3~ 0.9g/cm
3.In an embodiment of the present invention, the melt flow rate (MFR) of described plasticized modifier can be 6g/10min ~ 14g/10min.
In an embodiment of the present invention, the tensile stress of 100% strain of described plasticized modifier can be 0.6MPa ~ 0.7MPa; In other examples, the tensile stress of 100% strain of described plasticized modifier can be 0.65MPa ~ 0.68MPa.In an embodiment of the present invention, the tensile stress that described plasticized modifier 300% strains can be 1.2MPa ~ 1.3MPa; In other examples, the tensile stress that described plasticized modifier 300% strains can be 1.23MPa ~ 1.27MPa; In a further embodiment, the tensile stress that described plasticized modifier 300% strains is 1.24MPa.
In an embodiment of the present invention, the yield strength of described plasticized modifier is 9MPa ~ 10MPa; In other examples, the yield strength of described plasticized modifier is 9.2MPa ~ 9.6MPa; In a further embodiment, the yield strength of described plasticized modifier is 9.3MPa.
In an embodiment of the present invention, the elongation at break of described plasticized modifier is 1000% ~ 1400%; In other examples, the elongation at break of described plasticized modifier is 1100% ~ 1300%; In a further embodiment, the elongation at break of described plasticized modifier is 1200%.
The source of the present invention to described plasticized modifier does not have special restriction, adopt the plasticized modifier of mentioned kind well known to those skilled in the art, can be bought by market, as the product of POE 4085 trade mark of the product or Mitsui chemistry that can adopt the SEBS G2806 model of Ke Teng company of the U.S..
In an embodiment of the present invention, in sandwich layer, the mass ratio of binary copolymerization PP and plasticized modifier is (4 ~ 9): 1; In other examples, in sandwich layer, the mass ratio of binary copolymerization PP and plasticized modifier is (5 ~ 8): 1; In a further embodiment, in sandwich layer, the mass ratio of binary copolymerization PP and plasticized modifier is (6 ~ 7): 1.
In an embodiment of the present invention, the thickness of described sandwich layer can be 35 microns ~ 45 microns; In other examples, the thickness of described sandwich layer can be 38 microns ~ 42 microns; In a further embodiment, the thickness of described sandwich layer can be 40 microns.
Stretch-proof film provided by the invention comprises the hot sealing layer being arranged on described core layer surface, and the material of described hot sealing layer comprises block copolymerization polypropylene, binary copolymerization polypropylene, opening agent and slipping agent.In the present invention, described block copolymerization polypropylene is consistent with block copolymerization polypropylene described in technique scheme, does not repeat them here.
In an embodiment of the present invention, the melt flow rate of the binary copolymerization polypropylene (binary copolymerization PP) in hot sealing layer is 6g/10min ~ 8g/10min; In other examples, the melt flow rate of the binary copolymerization PP in hot sealing layer is 6.5g/10min ~ 7.5g/10min; In a further embodiment, the melt flow rate of the binary copolymerization PP in hot sealing layer is 7g/10min.
In an embodiment of the present invention, the density of the binary copolymerization PP in hot sealing layer is 0.8g/cm
3~ 1g/cm
3; In other examples, the density of the binary copolymerization PP in hot sealing layer is 0.85g/cm
3~ 0.95g/cm
3; In a further embodiment, the density of the binary copolymerization PP in hot sealing layer is 0.9g/cm
3.
In an embodiment of the present invention, the molding shrinkage of the binary copolymerization PP in hot sealing layer is 1.5% ~ 1.7%; In other examples, it is 1.6% ~ 1.65% that the binary copolymerization PP in hot sealing layer obtains molding shrinkage.
In an embodiment of the present invention, the notch impact strength of the binary copolymerization PP in hot sealing layer is 2Kg.cm/cm ~ 4Kg.cm/cm; In other examples, the notch impact strength of the binary copolymerization PP in hot sealing layer is 2.5Kg.cm/cm ~ 3.5Kg.cm/cm; In a further embodiment, the notch impact strength of the binary copolymerization PP in hot sealing layer is 3Kg.cm/cm.
In an embodiment of the present invention, the hot strength of the binary copolymerization PP in hot sealing layer is 34MPa ~ 35MPa; In other examples, the hot strength of the binary copolymerization PP in hot sealing layer is 34.2MPa ~ 34.6MPa; In a further embodiment, the hot strength of the binary copolymerization PP in hot sealing layer is 34.3MPa.
In an embodiment of the present invention, the elongation at break of the binary copolymerization PP in hot sealing layer is 450% ~ 550%; In other examples, the elongation at break of the binary copolymerization PP in hot sealing layer is 480% ~ 520%; In a further embodiment, the elongation at break of the binary copolymerization PP in hot sealing layer is 500%.
In an embodiment of the present invention, the bending modulus of the binary copolymerization PP in hot sealing layer is 950MPa ~ 1050MPa; In other examples, the bending modulus of the binary copolymerization PP in hot sealing layer is 970MPa ~ 1000MPa; In a further embodiment, the bending modulus of the binary copolymerization PP in hot sealing layer is 980MPa.
In an embodiment of the present invention, the Rockwell hardness of the binary copolymerization PP in hot sealing layer is 85R ~ 95R; In other examples, the Rockwell hardness of the binary copolymerization PP in hot sealing layer is 88R ~ 92R; In a further embodiment, the Rockwell hardness of the binary copolymerization PP in hot sealing layer is 90R.
In an embodiment of the present invention, the Vicat softening point of the binary copolymerization PP in hot sealing layer is 125 DEG C ~ 135 DEG C; In other examples, the Vicat softening point of the binary copolymerization PP in hot sealing layer is 128 DEG C ~ 132 DEG C; In a further embodiment, the Vicat softening point of the binary copolymerization PP in hot sealing layer is 130 DEG C.
In an embodiment of the present invention, the heat distortion temperature of the binary copolymerization PP in hot sealing layer is 90 DEG C ~ 100 DEG C; At other is in example, and the heat distortion temperature of the binary copolymerization PP in hot sealing layer is 94 DEG C ~ 98 DEG C; In a further embodiment, the heat distortion temperature of the binary copolymerization PP in hot sealing layer is 95 DEG C.
The source of the present invention to the binary copolymerization PP in hot sealing layer does not have special restriction, adopt the binary copolymerization PP of mentioned kind well known to those skilled in the art, can be bought by market and obtain, the product of the RF402 model provided as Samsung Total SA of Korea S can be adopted.
In an embodiment of the present invention, in described hot sealing layer, block copolymerization polypropylene and the polyacrylic mass ratio of binary copolymerization are 1:(4 ~ 8.5); In other examples, in described hot sealing layer, block copolymerization polypropylene and the polyacrylic mass ratio of binary copolymerization are 1:(5 ~ 8); In a further embodiment, in described hot sealing layer, block copolymerization polypropylene and the polyacrylic mass ratio of binary copolymerization are 1:(6 ~ 7).
In an embodiment of the present invention, described opening agent can be mineral-type opening agent; In other examples, the main component of described opening agent can be silica, and described silica both can be natural silica also can be synthetic silica.In an embodiment of the present invention, the average grain diameter of described opening agent can be 4 microns ~ 8 microns; In a further embodiment, the average grain diameter of described opening agent can be 5 microns ~ 6 microns.The source of the present invention to described opening agent does not have special restriction, adopts the opening agent of mentioned kind well known to those skilled in the art, can be bought obtain, as adopted the opening agent of ABPP 10S model by market.
In an embodiment of the present invention, the mass content of described opening agent in hot sealing layer is 2000PPM ~ 2500PPM; In other examples, the mass content of opening agent in hot sealing layer is 2200PPM ~ 2300PPM.In the present invention, when described opening agent is in the scope described in technique scheme, the stretch-proof film obtained has lower coefficient of friction.
In an embodiment of the present invention, described slipping agent can be oleamide class slipping agent or erucyl amide class slipping agent.In an embodiment of the present invention, described slipping agent can make the coefficient of friction of stretch-proof film provided by the invention reach 0.08 ~ 0.22; In other examples, described slipping agent can make the coefficient of friction of stretch-proof film provided by the invention reach 0.1 ~ 0.15.The source of the present invention to described slipping agent does not have special restriction, adopts the slipping agent of mentioned kind well known to those skilled in the art, can be bought obtain, as adopted the product of SE07PP model by market.
In an embodiment of the present invention, the mass content of described slipping agent in hot sealing layer is 3000PPM ~ 3500PPM; In a further embodiment, the mass content of described slipping agent in hot sealing layer is 3200PPM ~ 3300PPM.In the present invention, when described slipping agent is in the scope described in technique scheme, the coefficient of friction of stretch-proof film can be reduced further.
In an embodiment of the present invention, described stretch-proof membrane preparation method is multi-layer co-extruded the tape casting, the present invention does not have special restriction to described multi-layer co-extruded the tape casting, adopts multi-layer co-extruded the tape casting well known to those skilled in the art to prepare the technical scheme of composite membrane.In an embodiment of the present invention, the equipment preparing described stretch-proof film can be casting machine; In other examples, the equipment preparing described stretch-proof film can be three layers of casting machine.In an embodiment of the present invention, the preparation method of described stretch-proof film can be:
Configuration corona layer material, described corona layer material comprises block copolymerization polypropylene;
Configuration sandwich layer material, described sandwich layer material comprises binary copolymerization polypropylene and plasticized modifier;
Configuration hot sealing layer material, described hot sealing layer material comprises block copolymerization polypropylene, binary copolymerization polypropylene, opening agent and slipping agent;
Described corona layer material, sandwich layer material and hot sealing layer material are carried out multi-layer co-extruded curtain coating, obtains stretch-proof film.
In the present invention, the kind of the kind of the block copolymerization polypropylene in described corona layer material and source and the block copolymerization polypropylene in corona layer described in technique scheme with originate consistent, do not repeat them here.In the present invention, the kind of the kind of the binary copolymerization polypropylene in described sandwich layer material and plasticized modifier, source and mass ratio and the binary copolymerization polypropylene in sandwich layer described in technique scheme and plasticized modifier, source and mass ratio are consistent, do not repeat them here.In of the present invention, the kind of the kind of the block copolymerization polypropylene in described hot sealing layer material, binary copolymerization polypropylene, opening agent and slipping agent, source and consumption and the block copolymerization polypropylene in hot sealing layer described in technique scheme, binary copolymerization polypropylene, opening agent and slipping agent, source and consumption are consistent, do not repeat them here.
In an embodiment of the present invention, the chilling temp of described multi-layer co-extruded curtain coating is 18 DEG C ~ 22 DEG C; In other examples, the chilling temp of described multi-layer co-extruded curtain coating is 19 DEG C ~ 21 DEG C.In an embodiment of the present invention, the processing temperature of described multi-layer co-extruded curtain coating is 245 DEG C ~ 255 DEG C; In other examples, the processing temperature of described multi-layer co-extruded curtain coating is 248 DEG C ~ 252 DEG C; In a further embodiment, the processing temperature of described multi-layer co-extruded curtain coating is 250 DEG C.In an embodiment of the present invention, the linear velocity of described multilayer curtain coating co-extrusion is 75m/min ~ 85m/min; In other examples, the linear velocity of described multilayer curtain coating co-extrusion is 78m/min ~ 82m/min; In a further embodiment, the linear velocity of described multilayer curtain coating co-extrusion is 80m/min.
The chilling temp of multi-layer co-extruded curtain coating described in technique scheme, processing temperature and linear velocity is adopted to prepare stretch-proof film, the degree of crystallinity of stretch-proof film can be reduced, increase the ratio of amorphous area in stretch-proof film, make stretch-proof film more pliable and tougher, thus there is better stretch-proof effect.
Block copolymerization polypropylene in stretch-proof film corona layer provided by the invention can improve the pliability of film, plasticized modifier in sandwich layer can improve the pliability of film further, coordinate the material of hot sealing layer simultaneously, make stretch-proof film provided by the invention have good stretch-proof performance.
The invention provides a kind of packaging bag, comprise the stretch-proof film described in technique scheme.In an embodiment of the present invention, described packaging bag comprises:
Stretch-proof rete;
Aramid layer;
Be arranged on the binding agent in the middle of described stretch-proof rete and aramid layer.
In the present invention, the stretch-proof film in described stretch-proof rete is consistent with stretch-proof film described in technique scheme, does not repeat them here.In an embodiment of the present invention, the thickness of described stretch-proof rete is 50 microns ~ 120 microns; In other examples, the thickness of described stretch-proof rete is 60 microns ~ 100 microns; In a further embodiment, the thickness of described stretch-proof rete is 70 microns ~ 90 microns.
In an embodiment of the present invention, the thickness of described aramid layer is 15 microns ~ 25 microns; In other examples, the thickness of described aramid layer is 18 microns ~ 22 microns.
In an embodiment of the present invention, the shear strength of described binding agent can be 1MPa/cm ~ 1.2MPa/cm; In other examples, the shear strength of described binding agent can be 1.1MPa/cm.In an embodiment of the present invention, the viscosity of described binding agent can be 100cps ~ 300cps; In other examples, the viscosity of described binding agent can be 150cps ~ 250cps; In a further embodiment, the viscosity of described binding agent can be 200cps.
In an embodiment of the present invention, the temperature tolerance of described binding agent is-50 DEG C ~ 100 DEG C; In other examples, the temperature tolerance of described binding agent is-20 DEG C ~ 80 DEG C; In a further embodiment, the temperature tolerance of described binding agent is 0 DEG C ~ 60 DEG C.In an embodiment of the present invention, bonding positioning time of described binding agent is 8 seconds ~ 12 seconds; In other examples, bonding positioning time of described binding agent is 10 seconds.In an embodiment of the present invention, the complete hardening time of described binding agent is 20 hours ~ 30 hours; In other examples, the complete hardening time of described binding agent is 24 hours ~ 26 hours.
In an embodiment of the present invention, the pulling force of described binding agent is 700N ~ 720N; In other examples, the pulling force of described binding agent can be 705N ~ 715N.The present invention does not have special restriction to the kind of described binding agent and source, adopts the binding agent of mentioned kind well known to those skilled in the art, can be bought obtain, as adopted the glue of the KD-811 model of scape Shun by market.
In an embodiment of the present invention, the consumption of described binding agent is 3g/m
2~ 4g/m
2; In other examples, the consumption of described binding agent is 3.2g/m
2~ 3.6g/m
2.
The preparation method of the present invention to described packaging bag does not have special restriction, the technology of preparing scheme of packaging bag well known to those skilled in the art is adopted to prepare, as packaging bag as described in can preparing in Japanese Tuo Tani tri-banding equipment, concrete operations for: stretch-proof film described in technique scheme surface is according to the binding agent described in the consumption of binder coating technique scheme described in technique scheme, by PA membrane under the effect of binding agent with stretch-proof film compound, obtain packaging bag, the consistency of thickness of polyamide film layer described in the thickness of described PA membrane and technique scheme.
Containing above-mentioned stretch-proof film in packaging bag provided by the invention, this packaging bag is made to have good tear resistance.
According to the standard of the 3rd part in GB/T1040.3-2006 " mensuration of plastic tensile performance ", test the elongation at break properties of stretch-proof film provided by the invention, test result is, the longitudinal fracture percentage elongation of stretch-proof film provided by the invention is 500% ~ 585%, transverse breakage percentage elongation is 560% ~ 635%, stretch-proof better performances.
According to the method for QB/T2358-1998 " test of plastic film packaging bag heat sealing strength ", test the heat seal strength of packaging bag provided by the invention, test result is, the heat seal strength of packaging bag provided by the invention is 90N/15mm ~ 94N/15mm; According to the standard of the 3rd part in GB/T1040.3-2006 " mensuration of plastic tensile performance ", test the percentage elongation of packaging bag provided by the invention, test result is, the percentage elongation of packaging bag provided by the invention is 88% ~ 93%; It can thus be appreciated that packaging film provided by the invention has good sealing intensity and tear resistance.
Embodiment 1
Configuration corona layer material, the product of the J351F model that the Hyosung Corporation of Korea S that described corona layer material comprises 100g provides;
Configuration sandwich layer material, the product of SEBS 2806 model that the Ke Teng company of the F800E product that the Shanghai Jinshan petro-chemical corporation that described sandwich layer material comprises 80g provides and 20g provides;
Configuration hot sealing layer material, the slipping agent of the opening agent of ABPP10S model that the product of J351F model that the product of the RF402 model that the Samsung of Korea S that described hot sealing layer material comprises 75g provides, the Hyosung Corporation of Korea S of 18g provide, precious Need Inc. of 2g provide and the SE07PP model that the superior company in Jiangyin of 5g provides;
Described corona layer material, sandwich layer material and hot sealing layer material are carried out multi-layer co-extruded curtain coating on three layers of casting machine, obtains stretch-proof film; The chilling temp of described multi-layer co-extruded curtain coating is 18 DEG C, and the processing temperature of described multi-layer co-extruded curtain coating is 245 DEG C, and the linear velocity of described multi-layer co-extruded curtain coating is 75m/min.
The stretch-proof film that the embodiment of the present invention 1 prepares comprises the corona layer that thickness is 15 microns, and the thickness being arranged on described corona layer surface is the sandwich layer of 40 microns, and the thickness being arranged on described core layer surface is the hot sealing layer of 15 microns.
The longitudinal fracture percentage elongation of the stretch-proof film provided according to the method test embodiment of the present invention 1 described in technique scheme and transverse breakage percentage elongation, test result is, the longitudinal fracture percentage elongation of the stretch-proof film that the embodiment of the present invention 1 provides be 585%, transverse breakage percentage elongation is 635%, stretch-proof better performances.
Embodiment 2
Configuration corona layer material, the product of the J351F model that the Hyosung Corporation of Korea S that described corona layer material comprises 100g provides;
Configuration sandwich layer material, the product of SEBS 2806 model that the Ke Teng company of the F800E product that the Shanghai Jinshan petro-chemical corporation that described sandwich layer material comprises 90g provides and 10g provides;
Configuration hot sealing layer material, the slipping agent of the opening agent of ABPP10S model that the product of J351F model that the product of the RF402 model that the Samsung of Korea S that described hot sealing layer material comprises 75g provides, the Hyosung Corporation of Korea S of 18g provide, precious Need Inc. of 2g provide and the SE07PP model that the superior company in Jiangyin of 5g provides;
Described corona layer material, sandwich layer material and hot sealing layer material are carried out multi-layer co-extruded curtain coating on three layers of casting machine, obtains stretch-proof film; The chilling temp of described multi-layer co-extruded curtain coating is 22 DEG C, and the processing temperature of described multi-layer co-extruded curtain coating is 255 DEG C, and the linear velocity of described multi-layer co-extruded curtain coating is 85m/min.
The stretch-proof film that the embodiment of the present invention 2 prepares comprises the corona layer that thickness is 15 microns, and the thickness being arranged on described corona layer surface is the sandwich layer of 40 microns, and the thickness being arranged on described core layer surface is the hot sealing layer of 15 microns.
The longitudinal fracture percentage elongation of the stretch-proof film provided according to the method test embodiment of the present invention 2 described in technique scheme and transverse breakage percentage elongation, test result is, the longitudinal fracture percentage elongation of the stretch-proof film that the embodiment of the present invention 2 provides is 498%, transverse breakage percentage elongation is 563%, stretch-proof better performances.
Embodiment 3
Configuration corona layer material, the product of the J351F model that the Hyosung Corporation of Korea S that described corona layer material comprises 100g provides;
Configuration sandwich layer material, the product of SEBS 2806 model that the Ke Teng company of the F800E product that the Shanghai Jinshan petro-chemical corporation that described sandwich layer material comprises 85g provides and 15g provides;
Configuration hot sealing layer material, the slipping agent of the opening agent of ABPP10S model that the product of J351F model that the product of the RF402 model that the Samsung of Korea S that described hot sealing layer material comprises 83g provides, the Hyosung Corporation of Korea S of 10g provide, precious Need Inc. of 2g provide and the SE07PP model that the superior company in Jiangyin of 5g provides;
Described corona layer material, sandwich layer material and hot sealing layer material are carried out multi-layer co-extruded curtain coating on three layers of casting machine, obtains stretch-proof film; The chilling temp of described multi-layer co-extruded curtain coating is 20 DEG C, and the processing temperature of described multi-layer co-extruded curtain coating is 250 DEG C, and the linear velocity of described multilayer curtain coating co-extrusion is 80m/min.
The stretch-proof film that the embodiment of the present invention 3 prepares comprises the corona layer that thickness is 15 microns, and the thickness being arranged on described corona layer surface is the sandwich layer of 40 microns, and the thickness being arranged on described core layer surface is the hot sealing layer of 15 microns.
The longitudinal fracture percentage elongation of the stretch-proof film provided according to the method test embodiment of the present invention 3 described in technique scheme and transverse breakage percentage elongation, test result is, the longitudinal fracture percentage elongation of the stretch-proof film that the embodiment of the present invention 3 provides is 532%, transverse breakage percentage elongation is 608%, and stretch-proof effect is better.
Embodiment 4
Configuration corona layer material, the product of the J351F model that the Hyosung Corporation of Korea S that described corona layer material comprises 100g provides;
Configuration sandwich layer material, the product of SEBS 2806 model that the Ke Teng company of the F800E product that the Shanghai Jinshan petro-chemical corporation that described sandwich layer material comprises 85g provides and 15g provides;
Configuration hot sealing layer material, the slipping agent of the opening agent of ABPP10S model that the product of J351F model that the product of the RF402 model that the Samsung of Korea S that described hot sealing layer material comprises 83g provides, the Hyosung Corporation of Korea S of 10g provide, precious Need Inc. of 2g provide and the SE07PP model that the superior company in Jiangyin of 5g provides;
Described corona layer material, sandwich layer material and hot sealing layer material are carried out multi-layer co-extruded curtain coating on three layers of casting machine, obtains stretch-proof film; The chilling temp of described multi-layer co-extruded curtain coating is 19 DEG C, and the processing temperature of described multi-layer co-extruded curtain coating is 252 DEG C, and the linear velocity of described multi-layer co-extruded curtain coating is 78m/min.
The stretch-proof film that the embodiment of the present invention 4 prepares comprises the corona layer that thickness is 15 microns, and the thickness being arranged on described corona layer surface is the sandwich layer of 40 microns, and the thickness being arranged on described core layer surface is the hot sealing layer of 15 microns.
The longitudinal fracture percentage elongation of the stretch-proof film provided according to the method test embodiment of the present invention 4 described in technique scheme and transverse breakage percentage elongation, test result is, the longitudinal fracture percentage elongation of the stretch-proof film that the embodiment of the present invention 4 provides is 551%, transverse breakage percentage elongation is 615%, and stretch-proof effect is better.
Embodiment 5
In Japanese Tuo Tani tri-banding equipment, prepare packaging bag, the glue of 811 models that stretch-proof film surface coating Rhom and Hass embodiment 1 prepared provides, coated weight is 3g/m
2;
Thickness Xiao Xing FCFC provided is that the PA membrane of 25 microns is compounded in above-mentioned stretch-proof film surface by above-mentioned glue, obtains packaging bag.
The packaging bag that the embodiment of the present invention 5 prepares comprises the aramid layer that thickness is 25 microns, and thickness is the stretch-proof rete of 70 microns, is arranged on the glue between described aramid layer and stretch-proof rete.
According to the method described in technique scheme, the heat seal strength of the packaging bag that the test embodiment of the present invention 5 prepares and percentage elongation, test result is, the heat seal strength of the packaging bag that the embodiment of the present invention 5 provides is 89N/15mm, percentage elongation is 93%, has good sealing intensity and tear resistance.
Embodiment 6
In Japanese Tuo Tani tri-banding equipment, prepare packaging bag, the glue of 811 models that stretch-proof film surface coating Rhom and Hass embodiment 2 prepared provides, coated weight is 4g/m
2;
Thickness Xiao Xing FCFC provided is that the PA membrane of 25 microns is compounded in above-mentioned stretch-proof film surface by above-mentioned glue, obtains packaging bag.
The packaging bag that the embodiment of the present invention 6 prepares comprises the aramid layer that thickness is 25 microns, and thickness is the stretch-proof rete of 70 microns, is arranged on the glue between described aramid layer and stretch-proof rete.
According to the method described in technique scheme, the heat seal strength of the packaging bag that the test embodiment of the present invention 6 prepares and percentage elongation, test result is, the heat seal strength of the packaging bag that the embodiment of the present invention 6 provides is 94N/15mm, percentage elongation is 88%, has good sealing intensity and tear resistance.
Embodiment 7
In Japanese Tuo Tani tri-banding equipment, prepare packaging bag, the glue of 811 models that stretch-proof film surface coating Rhom and Hass embodiment 3 prepared provides, coated weight is 3.2g/m
2;
Thickness Xiao Xing FCFC provided is that the PA membrane of 25 microns is compounded in above-mentioned stretch-proof film surface by above-mentioned glue, obtains packaging bag.
The packaging bag that the embodiment of the present invention 7 prepares comprises the aramid layer that thickness is 25 microns, and thickness is the stretch-proof rete of 70 microns, is arranged on the glue between described aramid layer and stretch-proof rete.
According to the method described in technique scheme, the heat seal strength of the packaging bag that the test embodiment of the present invention 7 prepares and percentage elongation, test result is, the heat seal strength of the packaging bag that the embodiment of the present invention 7 provides is 92N/15mm, percentage elongation is 91%, has good sealing intensity and tear resistance.
Embodiment 8
In Japanese Tuo Tani tri-banding equipment, prepare packaging bag, the glue of 811 models that stretch-proof film surface coating Rhom and Hass embodiment 4 prepared provides, coated weight is 3.6g/m
2;
Thickness Xiao Xing FCFC provided is that the PA membrane of 25 microns is compounded in above-mentioned stretch-proof film surface by above-mentioned glue, obtains packaging bag.
The packaging bag that the embodiment of the present invention 8 prepares comprises the aramid layer that thickness is 25 microns, and thickness is the stretch-proof rete of 70 microns, is arranged on the glue between described aramid layer and stretch-proof rete.
According to the method described in technique scheme, the heat seal strength of the packaging bag that the test embodiment of the present invention 8 prepares and percentage elongation, test result is, the heat seal strength of the packaging bag that the embodiment of the present invention 8 provides is 93N/15mm, percentage elongation is 90%, has good sealing intensity and tear resistance.
Comparative example 1
Adopt commercially available boiling CPP film as packaging film.
Longitudinal fracture percentage elongation and the transverse breakage percentage elongation of the packaging film that comparative example 1 of the present invention provides is tested according to the method described in technique scheme, test result is, the longitudinal fracture percentage elongation of the packaging film that comparative example 1 of the present invention provides is 444.1%, transverse breakage percentage elongation is 472.6%, and stretch-proof effect is poor.
Comparative example 2
Packaging bag is prepared according to the method described in embodiment 5, as different from Example 5, the stretch-proof film that the packaging film alternative embodiment 1 adopting comparative example 1 to provide prepares.
According to the method described in technique scheme, test heat seal strength and the percentage elongation of the packaging bag that comparative example 2 of the present invention provides, test result is, the heat seal strength of the packaging bag that comparative example 2 of the present invention provides is 60N/15mm, percentage elongation is 25%, sealing intensity and tear resistance poor.
As seen from the above embodiment, the invention provides a kind of stretch-proof film, comprising: corona layer, the material of described corona layer is block copolymerization polypropylene; Be arranged on the sandwich layer on described corona layer surface, the material of described sandwich layer comprises binary copolymerization polypropylene and plasticized modifier; Be arranged on the hot sealing layer of described core layer surface, the material of described hot sealing layer comprises block copolymerization polypropylene, binary copolymerization polypropylene, opening agent and slipping agent.Block copolymerization polypropylene in stretch-proof film corona layer provided by the invention can improve the pliability of film, plasticized modifier in sandwich layer can improve the pliability of film further, coordinate the material of hot sealing layer simultaneously, make stretch-proof film provided by the invention have good stretch-proof performance.The invention provides a kind of packaging bag, comprise the stretch-proof film described in technique scheme.Containing above-mentioned stretch-proof film in packaging bag provided by the invention, this packaging bag is made to have good sealing intensity and tear resistance.
Claims (10)
1. a stretch-proof film, comprising:
Corona layer, the material of described corona layer is block copolymerization polypropylene;
Be arranged on the sandwich layer on described corona layer surface, the material of described sandwich layer comprises binary copolymerization polypropylene and plasticized modifier;
Be arranged on the hot sealing layer of described core layer surface, the material of described hot sealing layer comprises block copolymerization polypropylene, binary copolymerization polypropylene, opening agent and slipping agent.
2. stretch-proof film according to claim 1, is characterized in that, the thickness of described stretch-proof film is 50 microns ~ 120 microns.
3. stretch-proof film according to claim 1, is characterized in that, the Thickness Ratio of described corona layer, sandwich layer and hot sealing layer is (10 ~ 25): (50 ~ 80): (10 ~ 25).
4. stretch-proof film according to claim 1, is characterized in that, in described sandwich layer, the mass ratio of binary copolymerization polypropylene and plasticized modifier is (4 ~ 9): 1.
5. stretch-proof film according to claim 1, is characterized in that, in described hot sealing layer, block copolymerization polypropylene and the polyacrylic mass ratio of binary copolymerization are 1:(4 ~ 8.5).
6. stretch-proof film according to claim 1, is characterized in that, the mass content of described opening agent in described hot sealing layer is 2000PPM ~ 2500PPM.
7. stretch-proof film according to claim 1, is characterized in that, the mass content of described slipping agent in described hot sealing layer is 3000PPM ~ 3500PPM.
8. stretch-proof film according to claim 1, is characterized in that, the elongation at break of described block copolymerization polypropylene is 450% ~ 550%.
9. stretch-proof film according to claim 1, is characterized in that, described plasticized modifier is thermoplastic elastomer (TPE).
10. a packaging bag, comprises the stretch-proof film in claim 1 ~ 9 described in any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510136344.XA CN104708876A (en) | 2015-03-25 | 2015-03-25 | Anti-stretching film and packaging bag |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510136344.XA CN104708876A (en) | 2015-03-25 | 2015-03-25 | Anti-stretching film and packaging bag |
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| CN104708876A true CN104708876A (en) | 2015-06-17 |
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|---|---|---|---|
| CN201510136344.XA Pending CN104708876A (en) | 2015-03-25 | 2015-03-25 | Anti-stretching film and packaging bag |
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| CN105374434A (en) * | 2015-09-23 | 2016-03-02 | 沈群华 | CPP film for cable or optical cable, and manufacturing method thereof |
| CN107471799A (en) * | 2017-09-20 | 2017-12-15 | 浙江道明光电科技有限公司 | A kind of aluminum-plastic composite membrane heat sealing film and its manufacture method |
| CN109159519A (en) * | 2018-09-11 | 2019-01-08 | 嘉兴鹏翔包装材料有限公司 | A kind of high sealing-strength bidirection stretching polyolefine heat-shrinkable film |
| CN110696461A (en) * | 2019-10-09 | 2020-01-17 | 安徽国风塑业股份有限公司 | High-heat-seal-strength puncture-resistant BOPP film and preparation method thereof |
| CN110757925A (en) * | 2019-10-09 | 2020-02-07 | 安徽国风塑业股份有限公司 | BOPP film for high-temperature cooking compounding and preparation method thereof |
| CN110776689A (en) * | 2019-10-30 | 2020-02-11 | 太仓市鸿运包装材料有限公司 | Composition for cold-stretching covering film and cold-stretching covering film |
| CN113427863A (en) * | 2021-05-13 | 2021-09-24 | 惠州德昉高分子膜材料有限公司 | CPP film with high heat-seal strength and resistance to high-temperature steaming at 135 ℃ and preparation method thereof |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105374434A (en) * | 2015-09-23 | 2016-03-02 | 沈群华 | CPP film for cable or optical cable, and manufacturing method thereof |
| CN107471799A (en) * | 2017-09-20 | 2017-12-15 | 浙江道明光电科技有限公司 | A kind of aluminum-plastic composite membrane heat sealing film and its manufacture method |
| CN107471799B (en) * | 2017-09-20 | 2019-08-02 | 浙江道明光电科技有限公司 | A kind of aluminum-plastic composite membrane heat sealing film and its manufacturing method |
| CN109159519A (en) * | 2018-09-11 | 2019-01-08 | 嘉兴鹏翔包装材料有限公司 | A kind of high sealing-strength bidirection stretching polyolefine heat-shrinkable film |
| CN110696461A (en) * | 2019-10-09 | 2020-01-17 | 安徽国风塑业股份有限公司 | High-heat-seal-strength puncture-resistant BOPP film and preparation method thereof |
| CN110757925A (en) * | 2019-10-09 | 2020-02-07 | 安徽国风塑业股份有限公司 | BOPP film for high-temperature cooking compounding and preparation method thereof |
| CN110696461B (en) * | 2019-10-09 | 2021-11-09 | 安徽国风塑业股份有限公司 | High-heat-seal-strength puncture-resistant BOPP film and preparation method thereof |
| CN110776689A (en) * | 2019-10-30 | 2020-02-11 | 太仓市鸿运包装材料有限公司 | Composition for cold-stretching covering film and cold-stretching covering film |
| CN113427863A (en) * | 2021-05-13 | 2021-09-24 | 惠州德昉高分子膜材料有限公司 | CPP film with high heat-seal strength and resistance to high-temperature steaming at 135 ℃ and preparation method thereof |
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