CN104691071B - A kind of packaging film of puncture-resistant and preparation method thereof - Google Patents
A kind of packaging film of puncture-resistant and preparation method thereof Download PDFInfo
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- CN104691071B CN104691071B CN201510076827.5A CN201510076827A CN104691071B CN 104691071 B CN104691071 B CN 104691071B CN 201510076827 A CN201510076827 A CN 201510076827A CN 104691071 B CN104691071 B CN 104691071B
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- density polyethylene
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- resistant
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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
- 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
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
-
- 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
-
- 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
- B32B27/327—Layered products comprising a layer of synthetic resin comprising polyolefins comprising polyolefins obtained by a metallocene or single-site catalyst
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Laminated Bodies (AREA)
- Wrappers (AREA)
Abstract
The present invention discloses a kind of packaging film of puncture-resistant and preparation method thereof, and the packaging film of the puncture-resistant is three-layer composite structure, is divided into outer membrane layer, middle level film layer and internal layer membrane layer；The raw material composition of outer membrane layer is high density polyethylene (HDPE)；The raw material composition of middle level film layer is high density polyethylene (HDPE) and metallocene linear-low density polyethylene；The raw material composition of internal layer membrane layer is metallocene linear-low density polyethylene, low density polyethylene (LDPE) and polyolefin elastomer.The packaging film of the puncture-resistant has the advantages that excellent in mechanical performance, film skin-friction coefficient are appropriate compared with traditional hardware packaging composite film, it is adaptable to any automated packaging equipment.
Description
Technical field
The present invention relates to packaging film field, more particularly to a kind of packaging film of puncture-resistant and preparation method thereof.
Background technology
Packaging material used in traditional hardware industry is composite membrane, and the composite membrane is by a variety of monofilms by adhesive
It is combined with each other what is prepared.But, this composite membrane haves the shortcomings that easy absciss layer, not puncture-resistant so that handware exists
Bale broken phenomenon occurs in transportation.
Therefore, prior art has yet to be improved and developed.
The content of the invention
In view of providing a kind of packaging film of puncture-resistant and preparation method thereof, institute in above-mentioned the deficiencies in the prior art, the present invention
The packaging film for stating puncture-resistant is a kind of Three-layer co-extrusion plastic film being packed for suitable for hardware, with being combined that traditional hardware is packed
Film is compared, and has the advantages that excellent in mechanical performance, film skin-friction coefficient are appropriate, it is intended to solve to be currently used for handware packaging
The problem of there is easy absciss layer, not puncture-resistant in composite membrane.
Technical scheme is as follows：
A kind of packaging film of puncture-resistant, wherein, the packaging film of the puncture-resistant is three-layer composite structure, is divided into outer membrane
Layer, middle level film layer and internal layer membrane layer；
The raw material composition of outer membrane layer is high density polyethylene (HDPE)；
The raw material composition of middle level film layer is high density polyethylene (HDPE) and metallocene linear-low density polyethylene；
The raw material composition of internal layer membrane layer is metallocene linear-low density polyethylene, low density polyethylene (LDPE) and polyolefin elastic
Body.
The packaging film of described puncture-resistant, wherein, the raw material of middle level film layer is constituted according to the mass fraction, high-density polyethylene
The content of alkene is 40-60 parts, and the content of metallocene linear-low density polyethylene is 40-60 parts.
The packaging film of described puncture-resistant, wherein, the raw material of internal layer membrane layer is constituted according to the mass fraction, low density polyethylene
The content of alkene is 10-30 parts, and the content of metallocene linear-low density polyethylene is 40-60 parts, and the content of polyolefin elastomer is
20-40 parts.
The packaging film of described puncture-resistant, wherein, in outer membrane layer, the density of the high density polyethylene (HDPE) is
0.951g/cm3, melt index MI is 1.1g/10min.
The packaging film of described puncture-resistant, wherein, the density of metallocene linear-low density polyethylene described in the film layer of middle level
For 0.926g/cm3, melt index MI is 0.8g/10min；The density of the high density base ethene is 0.951g/cm3, melting refers to
Number MI is 1.1g/10min.
The packaging film of described puncture-resistant, wherein, the density of the metallocene linear-low density polyethylene of internal layer membrane layer is
0.918g/cm3, melt index MI is 1g/10min；The density of the low density polyethylene is 0.923g/cm3, melting refers to
Number MI is 4g/10min；The density of the polyolefin elastomer is 0.870g/cm3, melt index is 1g/10min.
The packaging film of described puncture-resistant, wherein, the gross thickness of the packaging film of the puncture-resistant for 60 μm~80 μm, outer layer
The thickness of film layer accounts for the 28-35% of gross thickness；The thickness of internal layer membrane layer accounts for the 40%~50% of gross thickness；Surplus is middle level
The thickness of film layer.
A kind of preparation method of the packaging film of puncture-resistant as described above, wherein, comprise the following steps：
High density polyethylene (HDPE) is poured into the screw extruder mixing of outer membrane layer；High density polyethylene (HDPE) and metallocene linear
After low density polyethylene (LDPE) is sufficiently mixed in proportion, the screw extruder mixing of middle level film layer is poured into；Metallocene linear is low close
After degree polyethylene, polyolefin elastomer and low density polyethylene (LDPE) are sufficiently mixed in proportion, the Screw Extrusion of internal layer membrane layer is poured into
Machine is kneaded；
The three-layer thin-film raw material of the presentation fluidised form shape after mixing are transported into three-layer co-extruded extruder film first melt simultaneously to melt
Extrusion, is mediated in bubble embryo, and by the draw of upper traction rotation tractor, film bubble is cooled in the presence of cooling vane
Type.
The preparation method of the packaging film of described puncture-resistant, wherein, the extruder temperature of outer membrane layer screw extruder is
150~170 DEG C, its head temperature is 165~180 DEG C；The extruder temperature of middle level film layer screw extruder is 155~165 DEG C,
Its head temperature is 165~185 DEG C DEG C；The extruder temperature of internal layer membrane layer screw extruder is 155~165 DEG C, its head temperature
Spend for 165~185 DEG C.
The preparation method of the packaging film of described puncture-resistant, wherein, outer membrane layer screw extruder, middle level film layer spiral shell
The rotating speed of the screw rod of bar extruder and internal layer membrane layer screw extruder is 20~40r/min, and extrusion tonnage is 25
~35MPa.
Beneficial effect：A kind of packaging film of puncture-resistant provided by the present invention, is three-layer co-extruded packaging film, by every layer not
With the collocation of material so that packaging film of the present invention is compared with traditional hardware packaging composite film, with excellent in mechanical performance, film table
Face coefficient of friction is appropriate, corrosion-resistant, the advantages of fall not bale broken.And due to the wide 110- of packaging film heat-sealing temperature scope of the present invention
150 DEG C, it is adaptable to the High-Speed Automatic packaging facilities that today's society is present.When packaging film of the present invention is used for hardware packaging film, no
Absciss layer and puncture-resistant occurs, the phenomenon of bale broken occurs in transportation in reduction.
Brief description of the drawings
Fig. 1 is the structural representation of the packaging film of puncture-resistant of the present invention.
Embodiment
The present invention provides a kind of packaging film of puncture-resistant and preparation method thereof, for make the purpose of the present invention, technical scheme and
Effect is clearer, clear and definite, and the present invention is described in more detail below.It should be appreciated that specific embodiment described herein
Only to explain the present invention, it is not intended to limit the present invention.
The packaging film of a kind of puncture-resistant provided by the present invention, as shown in figure 1, including outer membrane layer 1, middle level film layer
2 and internal layer membrane layer 3, formed by the way that three-layer co-extruded up-draught is cold.
Wherein, the constituent of outer membrane layer 1 is single high density polyethylene (HDPE) (HDPE)；The group of middle level film layer 2
It is high density polyethylene (HDPE) and metallocene linear-low density polyethylene, according to the mass fraction, the content of high density polyethylene (HDPE) into composition
For 40-60 parts, the content of metallocene linear-low density polyethylene is 40-60 parts；The constituent of internal layer membrane layer 3 is low-density
Polyethylene (LDPE), metallocene linear-low density polyethylene (m-LLDPE) and polyolefin elastomer (POE), according to the mass fraction,
The content of low density polyethylene (LDPE) is 10-30 parts, and the content of metallocene linear-low density polyethylene is 40-60 parts, polyolefin elastic
The content of body is 20-40 parts.
The gross thickness of the being folded without breaking packaging film is 60 μm~80 μm, and the thickness of outer membrane layer 1 accounts for the 28- of gross thickness
35%；Internal layer membrane layer 2 is hot sealing layer, and its thickness accounts for the 40%~50% of gross thickness；Surplus is the thickness of middle level film layer 3.
Outer membrane layer material selects high density polyethylene (HDPE), due to the steam-preventing that its is non-hygroscopic and has had, especially
Suitable for the packaging of handware, and hardness, tensile strength, wearability, electrical insulating property, toughness and cold resistance are preferable.Middle level
Film layer material selects high density polyethylene (HDPE) and metallocene linear-low density polyethylene, metallocene linear-low density polyethylene, tool
There are tensile strength, impact strength and the puncture resistance of brilliance.High density polyethylene (HDPE) and metallocene linear-low density polyethylene
Combine middle level film layer enhancing deflection and toughness so that packaging film impact resistance is good, and is difficult to be pierced, even if packaging film
Pierced, opening is also not easy to expand.Internal layer membrane layer material selects low density polyethylene (LDPE), metallocene linear-low density polyethylene
And polyolefin elastomer, low density polyethylene (LDPE), molding processibility is good, is adapted to the various moulding process of thermoplastic molding's processing, uses
In raising, the processing stability of internal layer.Metallocene linear-low density polyethylene m-LLDPE, with remarkable tensile strength, resists
Impact strength and puncture resistance.These remarkable strength characters become universal packaging film together with good drawing-off performance
Resin.Because the melt index of metallocene low density polyethylene (LDPE) is all than relatively low, so needing to add in internal layer membrane layer film
Polyolefin elastomer and low density polyethylene (LDPE) improve processing characteristics.Preferably, it can select containing opening agent and slipping agent
Metallocene linear-low density polyethylene, its performance is more excellent.The content of opening agent and slipping agent is appropriate, different manufacturers or not
Its content of same model can be different, will not be described here and limits.
Preferably, in outer membrane layer material, the density of the high density polyethylene (HDPE) is 0.951g/cm3(ASTM D-
1505), melt index MI is 1.1g/10min (ASTM D-1238,190 DEG C/2.16kg).
In the film layer material of middle level, the density of the metallocene linear-low density polyethylene is 0.92g/cm3
(ISO1183), melt index MI is 0.8g/10min (ISO1133)；The density of the high density base ethene is 0.951g/cm3
(ASTM D-1505), melt index MI is 1.1g/10min (ASTM D-1238,190 DEG C/2.16kg).
In internal layer membrane layer material, the density of the metallocene linear-low density polyethylene is 0.918g/cm3, melting refers to
Number MI is 1g/10min (ASTM D-1238)；The density of the low density polyethylene is 0.92g/cm3(ISO1183), melt
Melt index M I for 4g/10min (ISO1133,230 DEG C/2.16kg).The density of the polyolefin elastomer is 0.870g/
cm3(ASTM D-1505), melt index is 1g/10min (ASTM D-1238,190 DEG C/2.16kg).
The preparation method of the being folded without breaking packaging film is also provided in the present invention, following steps are specifically included：
S1, outer membrane layer film preparation：High density polyethylene (HDPE) is directly poured into outer membrane layer screw extruder to mix
Refining.Wherein, the extruder temperature of outer membrane layer screw extruder is 150~170 DEG C, and the head temperature of its screw extruder is
165~180 DEG C.The rotating speed of the screw rod is 20~40r/min, and extrusion tonnage is 25~35MPa.
S2, middle level film layer film preparation：By high density polyethylene (HDPE) and metallocene linear-low density polyethylene in proportion
After being sufficiently mixed, middle level film layer screw extruder mixing is poured into.Wherein, the extruder temperature of middle level film layer screw extruder is
155~165 DEG C, the head temperature of its screw extruder is 165~185 DEG C.The rotating speed of the screw rod is 20~40r/min, is squeezed
Go out tonnage for 25~35MPa.
S3, internal layer membrane layer film preparation：By metallocene linear-low density polyethylene, polyolefin elastomer and low-density
After polyethylene is sufficiently mixed in proportion, internal layer membrane layer screw extruder mixing is poured into.Wherein, internal layer membrane layer screw extruder
Extruder temperature be 155~165 DEG C, the head temperature of its screw extruder is 165~185 DEG C.The rotating speed of the screw rod is 20
~40r/min, extrusion tonnage is 25~35MPa.
S4, extrusion molding co-extrusion up-draught are cold：The three-layer thin-film raw material of presentation fluidised form shape after mixing are conveyed simultaneously
To three-layer co-extruded extruder film head, the raw material of three kinds of fluidised form shapes are mediated in bubble embryo, passed through in the common melting extrusion of extruder head
The draw of upper traction rotation tractor, film bubble is cooled and shaped in the presence of cooling vane.Rolled up finally by wrap-up
Qu Suoshu being folded without breaking packaging films.Further, the rim charge produced during blown film, by retracting device, is recycled.
Below by way of specific embodiment, the present invention will be further described.
Embodiment 1
Prepared according to above-mentioned technique in the packaging film of the puncture-resistant, the present embodiment, the packaging film of the puncture-resistant it is total
Thickness is 60 μm, and outer membrane thickness degree is 16.8~21 μm, and middle level thin film layer thickness is 9~19.2 μm, internal layer membrane thickness
Spend for 24~30 μm (due to co-extrusion film thickness can not quasi- side measurement, so provided in embodiment for number range).Its
In, the composition of middle level film layer is m-LLDPE and HDPE, and mass parts are respectively 50 parts, 50 parts；The composition of internal layer membrane layer is m-
LLDPE, LDPE and POE, mass parts are 50 parts, 20 parts, 30 parts.The key technical indexes of the present embodiment is shown in Table 1.
Embodiment 2
Prepared according to above-mentioned technique in the packaging film of the puncture-resistant, the present embodiment, the packaging film of the puncture-resistant it is total
Thickness is 80 μm, and outer membrane thickness degree is 22.4~28 μm, and middle level thin film layer thickness is 12~25.6 μm, internal layer membrane thickness
Spend for 32~40 μm.Wherein, the composition of middle level film layer is m-LLDPE and HDPE, and mass parts are respectively 50 parts, 50 parts；Internal layer
The composition of film layer is m-LLDPE, LDPE and POE, and mass parts are 60 parts, 20 parts, 20 parts.
The key technical indexes of the present embodiment is shown in Table 1.
Embodiment 3
Prepared according to above-mentioned technique in the being folded without breaking packaging film, the present embodiment, the gross thickness of the being folded without breaking packaging film
For 70 μm, outer membrane thickness degree is 19.6~24.5 μm, and middle level thin film layer thickness is 10.5~22.4 μm, internal layer membrane thickness
Spend for 28~35 μm.Wherein, the composition of middle level film layer is m-LLDPE and HDPE, and mass parts are respectively 60 parts, 40 parts；Internal layer
The composition of film layer is m-LLDPE, LDPE and POE, and mass parts are respectively 50 parts, 20 parts, 30 parts.
The key technical indexes of the present embodiment is shown in Table 1.
Embodiment 4
Prepared according to above-mentioned technique in the being folded without breaking packaging film, the present embodiment, the gross thickness of the being folded without breaking packaging film
For 60 μm, outer membrane thickness degree is 13.2~16.8 μm, and middle level thin film layer thickness is 13.2~22.8 μm, internal layer membrane thickness
Spend for 24~30 μm.Wherein, the composition of middle level film layer is m-LLDPE and HDPE, and mass parts are respectively 40 parts, 60 parts；Internal layer
The composition of film layer is m-LLDPE, LDPE and POE, and mass parts are respectively 50 parts, 25 parts, 25 parts.
The key technical indexes of the present embodiment is shown in Table 1.
The performance test results of the packaging film of the embodiment 1~4 of table 1
The packaging film of above-described embodiment 1~4 is respectively used to the metal screws of the weight of 2 jin of packaging, packaging bag is high from 4m
Degree is freely fallen 5 times, the packaging bag that embodiment 1~4 is made not bale broken.
In summary, the packaging film of puncture-resistant provided by the present invention, is three-layer co-extruded packaging film, passes through every layer of different material
The collocation of material, is made under certain process conditions, compared with traditional hardware packaging composite film, with excellent in mechanical performance, film
Skin-friction coefficient is appropriate, the advantages of fall not bale broken, and heat-sealing temperature scope is wide 110-150 DEG C, it is adaptable to which today's society is present
High-Speed Automatic packaging facilities, with good economic benefit, give hardware industry to provide a kind of new packaging material.
It should be appreciated that the application of the present invention is not limited to above-mentioned citing, for those of ordinary skills, can
To be improved or converted according to the above description, all these modifications and variations should all belong to the guarantor of appended claims of the present invention
Protect scope.
Claims (4)
1. a kind of packaging film of puncture-resistant, it is characterised in that the packaging film of the puncture-resistant is three-layer composite structure, is divided into outer layer
Film layer, middle level film layer and internal layer membrane layer；
The raw material composition of outer membrane layer is high density polyethylene (HDPE)；
The raw material composition of middle level film layer is high density polyethylene (HDPE) and metallocene linear-low density polyethylene；
The raw material composition of internal layer membrane layer is metallocene linear-low density polyethylene, low density polyethylene (LDPE) and polyolefin elastomer；
According to the mass fraction, the content of high density polyethylene (HDPE) is 50 parts to the raw material composition of middle level film layer, and metallocene linear is low close
The content for spending polyethylene is 50 parts；
According to the mass fraction, the content of low density polyethylene (LDPE) is 20 parts to the raw material composition of internal layer membrane layer, and metallocene linear is low close
The content for spending polyethylene is 50 parts, and the content of polyolefin elastomer is 30 parts；
The gross thickness of the packaging film of the puncture-resistant is 60 μm, and the thickness of outer membrane layer accounts for 16.8-21 μm of gross thickness；Internal layer
The thickness of film layer accounts for 24-30 μm of gross thickness；Surplus is the thickness of middle level film layer；
In outer membrane layer, the density of the high density polyethylene (HDPE) is 0.951g/cm3, melt index MI is 1.1g/10min；
The density of metallocene linear-low density polyethylene described in the film layer of middle level is 0.92g/cm3, melt index MI is 0.8g/
10min；The density of the high density base ethene is 0.951g/cm3, melt index MI is 1.1g/10min；
The density of the metallocene linear-low density polyethylene of internal layer membrane layer is 0.918g/cm3, melt index MI is 1g/10min；
The density of the low density polyethylene is 0.92g/cm3, melt index MI is 4g/10min；The polyolefin elastomer
POE density is 0.870g/cm3, melt index is 1g/10min.
2. a kind of preparation method of the packaging film of puncture-resistant as claimed in claim 1, it is characterised in that comprise the following steps：
High density polyethylene (HDPE) is poured into the screw extruder mixing of outer membrane layer；High density polyethylene (HDPE) and metallocene linear are low close
After degree polyethylene is sufficiently mixed in proportion, the screw extruder mixing of middle level film layer is poured into；Metallocene linear low density is gathered
After ethene, polyolefin elastomer and low density polyethylene (LDPE) are sufficiently mixed in proportion, the screw extruder for pouring into internal layer membrane layer is mixed
Refining；
The three-layer thin-film raw material of presentation fluidised form shape after mixing are transported to three-layer co-extruded extruder film head melting extrusion simultaneously,
Mediate in bubble embryo, by the draw of upper traction rotation tractor, film bubble is cooled and shaped in the presence of cooling vane.
3. the preparation method of the packaging film of puncture-resistant according to claim 2, it is characterised in that outer membrane layer screw rod is squeezed
The extruder temperature for going out machine is 150~170 DEG C, and its head temperature is 165~180 DEG C；The screw rod of middle level film layer screw extruder
Temperature is 155~165 DEG C, and its head temperature is 165~185 DEG C DEG C；The extruder temperature of internal layer membrane layer screw extruder is 155
~165 DEG C, its head temperature is 165~185 DEG C.
4. the preparation method of the packaging film of puncture-resistant according to claim 3, it is characterised in that outer membrane layer screw rod is squeezed
The rotating speed for going out the screw rod of machine, middle level film layer screw extruder and internal layer membrane layer screw extruder is 20~40r/min, is squeezed
It is 25~35MPa to go out tonnage.
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| CN201510076827.5A CN104691071B (en) | 2015-02-11 | 2015-02-11 | A kind of packaging film of puncture-resistant and preparation method thereof |
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| CN201510076827.5A CN104691071B (en) | 2015-02-11 | 2015-02-11 | A kind of packaging film of puncture-resistant and preparation method thereof |
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| CN101659142B (en) * | 2009-06-30 | 2012-04-25 | 湖北慧狮塑业股份有限公司 | Multifunctional casting polyolefine firmness-increasing film |
| CN102501513B (en) * | 2011-11-24 | 2013-06-19 | 佛山新长盛塑料薄膜有限公司 | Puncture-resistant heavy packaging composite film and preparation thereof |
| CN102756523B (en) * | 2012-07-19 | 2015-09-02 | 山东天鹤塑胶股份有限公司 | Flexible container pack for liquids film |
| CN103587183B (en) * | 2013-11-15 | 2015-10-28 | 上海郡是新塑材有限公司 | A kind of high performance PE preservative film for automatic packaging machine |
| CN103770422B (en) * | 2014-01-23 | 2015-10-28 | 黄山永新股份有限公司 | High-stiffness puncture-resistant low-friction coefficient composite membrane and preparation method thereof |
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2015
- 2015-02-11 CN CN201510076827.5A patent/CN104691071B/en active Active
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