CN105061870A - Heat-sealing film and cover film adopting same - Google Patents
Heat-sealing film and cover film adopting same Download PDFInfo
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- CN105061870A CN105061870A CN201510426961.3A CN201510426961A CN105061870A CN 105061870 A CN105061870 A CN 105061870A CN 201510426961 A CN201510426961 A CN 201510426961A CN 105061870 A CN105061870 A CN 105061870A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/08—Copolymers of ethene
- C08L23/0807—Copolymers of ethene with unsaturated hydrocarbons only containing more than three carbon atoms
- C08L23/0815—Copolymers of ethene with aliphatic 1-olefins
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
- B29C49/04—Extrusion blow-moulding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
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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
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/24—All layers being polymeric
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/31—Heat sealable
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2435/00—Closures, end caps, stoppers
- B32B2435/02—Closures, end caps, stoppers for containers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/16—Applications used for films
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/16—Applications used for films
- C08L2203/162—Applications used for films sealable films
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/066—LDPE (radical process)
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2314/00—Polymer mixtures characterised by way of preparation
- C08L2314/06—Metallocene or single site catalysts
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
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Abstract
The invention discloses a heat-sealing film. The heat-sealing film comprises, in percentage by weight, 80%-89% of m-LLDPE (metallocene-linear low density polyethylene), 8.9%-16% of low-density polyethylene and 1.8%-4% of silicone master batch. The invention further discloses a cover film. The cover film comprises a surface layer, a middle layer and an inner layer, wherein the surface layer and the middle layer are made of polyethylene glycol terephthalate; the inner layer at least comprises a heat sealing layer; the heat sealing layer comprises, in percentage by weight, 80%-89% of m-LLDPE, 8.9%-16% of low-density polyethylene and 1.8%-4% of silicone master batch. The heat-sealing film has the advantages of a good heat sealing property with a box made of a PP (polypropylene) material and low cost. The cover film made of the heat-sealing film has the advantages of good hand tearing feeling, convenience in tearing and low cost and can be widely applied to the field of sealing films of PP boxes.
Description
Technical field
The present invention relates to plastic flexible package field, more specifically relate to epiphragma and the preparation method of a kind of heat sealing film and preparation method and this heat sealing film of employing thereof.
Background technology
Bean curd is one dish that a lot of people likes, but due to bean curd softer, easily crush in carrying process, especially tender bean curd, can not transport at a distance, this is also that a large large reason can not be done in most bean curd workshop.Along with industrialized development, occur now adopting plastics casing to take splendid attire bean curd, plastics casing has adopted harder plastics, not yielding, ensure that bean curd can not compressive deformation, meanwhile, plastics casing adopts epiphragma seal.The material of usual plastics casing is polypropylene (PP), it is little that PP has density, the feature that intensity is firm, but heat resisting temperature only has about 100 DEG C, existing epiphragma adopts PET/EVA mostly, although PET/EVA energy and PP well seal, its cost is high, and large with the viscosity of plastics casing, be difficult to tear with hand, usually be all adopt cutter to be cut open along plastic liner by epiphragma, very inconvenient, and easily cut the bean curd of the inside.But other its fusing points of epiphragma structure existing are high, the requirement of PP heat-sealing can not be met again.Therefore, need to develop a tearing property of hand good, cost is low, and can realize the epiphragma structure of heat-sealing at low temperatures, has met the heat-sealing demand of PP material bean curd box.
Summary of the invention
An object of the present invention is to provide a kind of heat sealing film and preparation method thereof, and this film heat sealability is good, and cost is low.
Another object of the present invention is to provide a kind of epiphragma and preparation method thereof, has uniform sealing-strength after the heat-sealing of this epiphragma, is convenient to human consumer and controls the unlatching dynamics of tearing epiphragma.
The technical scheme that the present invention solves the problems of the technologies described above employing is: a kind of heat sealing film, comprises the metallocene linear-low density polyethylene (m-LLDPE) of 80wt% ~ 89wt%, the Low Density Polyethylene of 8.9wt% ~ 16wt% and the silicone master batch of 1.8wt% ~ 4wt%.
Preferably, described metallocene linear-low density polyethylene, Low Density Polyethylene, silicone master batch ratio be 100:12.5:4 by weight.
A preparation method for heat sealing film, comprising: be in 130 DEG C ~ 160 DEG C extrusion and blow moldings by weight by the ratio of metallocene linear-low density polyethylene, Low Density Polyethylene, silicone master batch after 50:5 ~ 10:1 ~ 2.5 mix.
A kind of epiphragma, comprise surface layer, middle layer and internal layer, the material in described surface layer and middle layer is polyethylene terephthalate, described internal layer at least comprises hot sealing layer, and described hot sealing layer comprises the silicone master batch of the metallocene linear-low density polyethylene of 80wt% ~ 89wt%, the Low Density Polyethylene of 8.9wt% ~ 16wt% and 1.8wt% ~ 4wt%.
Further, described internal layer also comprises corona layer, is arranged on the supporting layer between corona layer and hot sealing layer.
Preferably, described corona layer comprises: 20wt% ~ 30wt% Low Density Polyethylene, 70wt% ~ 80wt% linear low density polyethylene.
Preferably, described supporting layer comprises: 40wt% ~ 60wt% Low Density Polyethylene, 40wt% ~ 60wt% linear low density polyethylene.
A preparation method for epiphragma, comprising: the one side coating Solvent Adhesive in middle layer, and after solvent evaporates, carry out first time dry type compound with described surface layer, the material in described surface layer and middle layer is polyethylene terephthalate;
Another side coating Solvent Adhesive in middle layer, carries out second time dry type compound with internal layer, obtains epiphragma after solvent evaporates; Described internal layer at least comprises hot sealing layer, comprises the silicone master batch of the metallocene linear-low density polyethylene of 80wt% ~ 89wt%, the Low Density Polyethylene of 8.9wt% ~ 16wt% and 1.8wt% ~ 4wt%.
Beneficial effect: the present invention adopts the silicone master batch of the metallocene linear-low density polyethylene of 80wt% ~ 89wt%, the Low Density Polyethylene of 8.9wt% ~ 16wt% and 1.8wt% ~ 4wt% to make heat sealing film by blowing, above-mentioned materials has the low advantage of cost, and metallocene linear-low density polyethylene to have heat seal strength moderate, and at low temperatures can the characteristic of involution, be suitable as hot sealing layer to use, but because m-LLDPE fusing point is low, the requirement carrying out with plastics casing sealing on existing heat-seal equipment can not be met; Described Low Density Polyethylene fusing point is than the height of m-LLDPE, with the fusing point that can improve mixing material after metallocene linear-low density polyethylene mixing, meet the requirement of blowing existing heat-seal equipment and plastics casing being sealed, and Low Density Polyethylene adhesive is good, there is the effect improving sealing thermal viscosity.Add appropriate silicone master batch in described heat sealing film, make the surface of the heat sealing film after blow molding concave-convex surface plane, the separation of convenient two-layer heat sealing film in blow-moulding process.Epiphragma of the present invention adopts above-mentioned heat sealing film to do hot sealing layer, and sealing-strength is even, and intensity is little, can meet the dynamics requirement that human consumer's hand tears epiphragma, conveniently tear epiphragma.
Embodiment
For understanding essence of the present invention better, below by being described better embodiment of the present invention, describing the present invention in detail but not limiting the present invention.
The material used in following examples and reagent, except illustrating, be common commercially available.
A kind of heat sealing film, comprises m-LLDPE, 8.9wt% of the 80wt% ~ 89wt% ~ Low Density Polyethylene of 16wt% and the silicone master batch of 1.8wt% ~ 4wt%.Described m-LLDPE has good heat sealability, but due to its fusing point low, the fusing point of m-LLDPE is 98 DEG C, and the heat-sealing temperature of heat sealing machine is about 120 DEG C, make independent m-LLDPE can not realize on existing heat sealing machine heat-sealing.Described Low Density Polyethylene (LDPE), require that its melting index is at the LDEP of 1.5-2.5g/10min, preferred model is the LDEP of 2426H, 2426H type LDPE has higher fusing point, its fusing point is 108 DEG C, by adding a certain proportion of 2426H type LDPE, the fusing point that m-LLDPE and 2426H type LDPE mixes rear particle can be improved, meet the heat-sealing requirement of existing heat-seal equipment.And 2426H type LDPE has good adhesive, blow molding is effective, and cost is low.Described silicone master batch has good oilness, release property and mobility, adds the heat sealing film of silicone master batch aftershaping, and its surface can form concavo-convex two dimensional structure, makes the heat sealing film after blow molding easily shear separation.
The mass percent of described 2426H type LDPE is 8.9wt% ~ 16wt%, and its ratio can not be too high, too high, affects the heat sealability of film, too low, and the fusing point of film is reduced, and is unfavorable for that film and box body realize sealing on heat-seal equipment.The mass percent of described silicone master batch is 1.8wt% ~ 4wt%, and silicone master batch content is too low, then the poor lubricity of film, is unfavorable for the separation of film, make shaping after film between stick together.Silicone master batch content is too high, then can increase the friction resistance of film, and what be unfavorable for the later stage walks film, walks membrane resistance large.
Present invention also offers the preparation method of above-mentioned heat sealing film, comprising: be in 130 DEG C ~ 160 DEG C extrusion and blow moldings by weight by the ratio of m-LLDPE, Low Density Polyethylene, silicone master batch after 50:5 ~ 10:1 ~ 2.5 mix.This blow molding process is method well known to those skilled in the art; concrete as; a certain proportion of M-LLDPE, 2426H type LDPE and silicone master batch are mixed; pipe embryo is formed through forcing machine melting; pressurized air is gone out from extruder die head center after being stretched by pipe; pipe is blown into blister film, sizing after the cooling of blister film is obtained film simultaneously.
Present invention also offers a kind of epiphragma, it is mainly used in food plastic packaging field, comprise surface layer, middle layer and internal layer, the material in described surface layer and middle layer is polyethylene terephthalate (PET), described internal layer at least comprises hot sealing layer, and described hot sealing layer comprises m-LLDPE, 8.9wt% of the 80wt% ~ 89wt% ~ Low Density Polyethylene of 16wt% and the silicone master batch of 1.8wt% ~ 4wt%.The thickness requirement of described hot sealing layer at 18-22u, preferred 20u.Described PET has good mechanical property, and folding resistance is good.There is good high and low temperature resistance simultaneously, can in 80 DEG C of temperature ranges life-time service, short-period used can resistance to 100 DEG C of high temperature, can resistance to-40 DEG C of low temperature, and very little to its mechanical impact during high and low temperature.In addition, PET also has excellent choke, water, oil and peculiar smell performance.Adopt PET as surface layer, it is mainly used in printing icon and word, adopts PET as middle layer, makes epiphragma have good intensity and barrier property.
For improving the combined strength bination of internal layer and middle layer, described internal layer also comprises corona layer, and described corona layer comprises: 20wt% ~ 30wt% Low Density Polyethylene (LDPE), 70wt% ~ 80wt% linear low density polyethylene (LLDPE).For improving barrier and the intensity of internal layer, supporting layer between described corona layer and hot sealing layer, described supporting layer comprises: 40wt% ~ 60wt% Low Density Polyethylene (LDPE), 40wt% ~ 60wt% linear low density polyethylene (LLDPE).The fusing point of described LDPE is lower, is easy to machine-shaping, and cheap.LLDPE is the multipolymer of ethene and alpha-olefin, its molecular structure linearly straight-chain the same as HDPE, but because adding alpha-olefin in monomer, cause on molecular chain containing many short and small and regular side chains, LLDPE thermal viscosity is good, has the effect improving sealing thermal viscosity.
Present invention also offers a kind of preparation method of above-mentioned epiphragma, comprising: the one side coating Solvent Adhesive in middle layer, after solvent evaporates, carry out first time dry type compound with described surface layer; Another side coating Solvent Adhesive in middle layer, carries out second time dry type compound with internal layer, obtains epiphragma after solvent evaporates.Solvent Adhesive preferred solvent type polyurethane sizing agent in the present invention.
In order to understand the present invention further, below in conjunction with embodiment, heat sealing film provided by the invention and epiphragma are described.
Embodiment 1: add in extruder barrel after 95KGm-LLDPE, 15KG2426H and 5KG silicone master batch is mixed; pipe embryo is formed through forcing machine melting; pressurized air is gone out from extruder die head center after being stretched by pipe; pipe is blown into blister film; blister film is obtained heat sealing film through vane cooling air cooling and shaping simultaneously, forcing machine technical parameter is set see table 1.
Table 1 forcing machine processing parameter:
Embodiment 2: add in extruder barrel after 100KGm-LLDPE, 12.5KG2426H and 4KG silicone master batch being mixed, other are with embodiment 1.
Embodiment 3: add in extruder barrel after 105KGm-LLDPE, 10KG2426H and 3KG silicone master batch being mixed, other are with embodiment 1.
Heat sealing film embodiment 1 to 3 prepared is after 120 DEG C of heat-sealings, random selecting three point in heat sealing film sealing prepared by embodiment 1, numbering is respectively 1a, 1b, 1c, random selecting three point in heat sealing film sealing prepared by embodiment 2, numbering is respectively 2a, 2b, 2c, random selecting three point in heat sealing film sealing prepared by embodiment 3, and numbering is respectively 3a, 3b, 3c, use the sealing-strength of above-mentioned 9 points of heat-sealing tester test, test result lists in table 2.
Table 2 sealing-strength test result
Embodiment 4: a kind of epiphragma, comprises internal layer, middle layer and surface layer, and the material in described surface layer and middle layer is polyethylene terephthalate (PET), and described internal layer comprises corona layer, supporting layer and hot sealing layer.Concrete preparation method is, first supporting layer one side is applied Solvent Adhesive, after solvent evaporates, carries out dry type compound with corona layer; Again by the another side of supporting layer coating Solvent Adhesive, after solvent evaporates, carry out with hot sealing layer the internal layer that dry type compound obtains epiphragma.In described corona layer, the ratio of LDPE and LLDPE is 1:3, and in described supporting layer, the ratio of LDPE and LLDPE is 1:1, and the structure of described hot sealing layer is with embodiment 1.
After internal layer completes, the one side coating Solvent Adhesive in middle layer, carries out first time dry type compound with described surface layer after solvent evaporates; Another side coating Solvent Adhesive in middle layer, carries out second time dry type compound with internal layer, obtains epiphragma after solvent evaporates.
Embodiment 5: the structure of described hot sealing layer is with embodiment 2, and other are with embodiment 4.
Embodiment 6: the structure of described hot sealing layer is with embodiment 3, and other are with embodiment 4.
Epiphragma obtained by embodiment 4,5,6 is sealed with the box body of PP material respectively at 130 DEG C, obtains box body A, B, C after sealing.3 points are selected at random at the sealing part of box body A, be numbered 1a, 2a, 3a, 3 points are selected at random at the sealing part of box body B, be numbered 1b, 2b, 3b, select 3 points at random at the sealing part of box body C, be numbered 1c, 2c, 3c, 6c, use the sealing-strength of above-mentioned 6 points of tension testing machine test, test result lists in table 3.
Table 3 sealing-strength test result
From above-mentioned test-results, the present invention has good heat sealability, and heat seal strength is even, and reliably, dynamics of tearing is suitable, good hand touch, facilitates human consumer to use.
The explanation of above embodiment just understands method of the present invention and core concept thereof for helping.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improve and modify and also fall in the protection domain of the claims in the present invention.
Claims (8)
1. a heat sealing film, is characterized in that: the silicone master batch comprising the metallocene linear-low density polyethylene of 80wt% ~ 89wt%, the Low Density Polyethylene of 8.9wt% ~ 16wt% and 1.8wt% ~ 4wt%.
2. as described in claim 1 heat sealing film, is characterized in that: described metallocene linear-low density polyethylene, Low Density Polyethylene, silicone master batch ratio be 100:12.5:4 by weight.
3. a preparation method for heat sealing film, comprising:
Be in 130 DEG C ~ 160 DEG C extrusion and blow moldings by weight by the ratio of metallocene linear-low density polyethylene, Low Density Polyethylene, silicone master batch after 50:5 ~ 10:1 ~ 2.5 mix.
4. an epiphragma, comprise surface layer, middle layer and internal layer, it is characterized in that: the material in described surface layer and middle layer is polyethylene terephthalate, described internal layer at least comprises hot sealing layer, and described hot sealing layer comprises the silicone master batch of the metallocene linear-low density polyethylene of 80wt% ~ 89wt%, the Low Density Polyethylene of 8.9wt% ~ 16wt% and 1.8wt% ~ 4wt%.
5. epiphragma as described in claim 4, is characterized in that: described internal layer also comprises corona layer, is arranged on the supporting layer between corona layer and hot sealing layer.
6. epiphragma as described in claim 5, is characterized in that: described corona layer comprises: 20wt% ~ 30wt% Low Density Polyethylene, 70wt% ~ 80wt% linear low density polyethylene.
7. epiphragma as described in claim 5, is characterized in that: described supporting layer comprises: 40wt% ~ 60wt% Low Density Polyethylene, 40wt% ~ 60wt% linear low density polyethylene.
8. a preparation method for epiphragma, comprising: the one side coating Solvent Adhesive in middle layer, and after solvent evaporates, carry out first time dry type compound with described surface layer, the material in described surface layer and middle layer is polyethylene terephthalate;
Another side coating Solvent Adhesive in middle layer, carries out second time dry type compound with internal layer, obtains epiphragma after solvent evaporates; Described internal layer at least comprises hot sealing layer, and described hot sealing layer comprises M-LLDPE, 8.9wt% of the 80wt% ~ 89wt% ~ Low Density Polyethylene of 16wt% and the silicone master batch of 1.8wt% ~ 4wt%.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106220947A (en) * | 2016-07-29 | 2016-12-14 | 无锡市华泰医药包装有限公司 | Medicinal high-barrier plastic-aluminum packaging film |
| CN106927112A (en) * | 2017-03-02 | 2017-07-07 | 浙江博升新材料有限公司 | A kind of transparent sealed membrane for Easy tearing lid, preparation method and transparent Easy tearing lid |
| CN107323053A (en) * | 2017-06-30 | 2017-11-07 | 黄山永新股份有限公司 | A kind of tear-resistant polyethylene film, composite membrane and preparation method thereof |
| CN109605890A (en) * | 2019-01-21 | 2019-04-12 | 河南省银丰塑料有限公司 | Three-layer co-extruded ultra-low temperature heat sealing packing film |
| CN112606510A (en) * | 2020-12-28 | 2021-04-06 | 福建鹏达包装材料有限公司 | Automatic exhaust packaging film capable of being heated by microwave and preparation process thereof |
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| CN1234525C (en) * | 2003-12-18 | 2006-01-04 | 黄山永新股份有限公司 | Thin-membrane for closing plastic container open |
| CN104191766A (en) * | 2014-09-03 | 2014-12-10 | 黄山永新股份有限公司 | Polyethylene film, packaging composite film and preparation method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106220947A (en) * | 2016-07-29 | 2016-12-14 | 无锡市华泰医药包装有限公司 | Medicinal high-barrier plastic-aluminum packaging film |
| CN106927112A (en) * | 2017-03-02 | 2017-07-07 | 浙江博升新材料有限公司 | A kind of transparent sealed membrane for Easy tearing lid, preparation method and transparent Easy tearing lid |
| CN107323053A (en) * | 2017-06-30 | 2017-11-07 | 黄山永新股份有限公司 | A kind of tear-resistant polyethylene film, composite membrane and preparation method thereof |
| CN107323053B (en) * | 2017-06-30 | 2018-11-13 | 黄山永新股份有限公司 | A kind of tear-resistant polyethylene film, composite membrane and preparation method thereof |
| CN109605890A (en) * | 2019-01-21 | 2019-04-12 | 河南省银丰塑料有限公司 | Three-layer co-extruded ultra-low temperature heat sealing packing film |
| CN112606510A (en) * | 2020-12-28 | 2021-04-06 | 福建鹏达包装材料有限公司 | Automatic exhaust packaging film capable of being heated by microwave and preparation process thereof |
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