CN209096188U - A kind of high stretching puncture resistant goods packing film - Google Patents
A kind of high stretching puncture resistant goods packing film Download PDFInfo
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- CN209096188U CN209096188U CN201820945135.9U CN201820945135U CN209096188U CN 209096188 U CN209096188 U CN 209096188U CN 201820945135 U CN201820945135 U CN 201820945135U CN 209096188 U CN209096188 U CN 209096188U
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- puncture resistant
- polyamide
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- goods packing
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Abstract
The utility model discloses a kind of high stretching puncture resistant goods packing films, are made of outer layer, middle layer and internal layer, and the outer layer is the blend of metallocene linear-low density polyethylene resin and ethylene modified pet resin；The composition that the middle layer includes has maleic anhydride grafting low density polyethylene (LDPE) and graphene oxide modified low-density polyethylene；The internal layer is polyamide-11 or polyamide -12.Compared with prior art, the advantages such as the packing film of the utility model has a high draw ratio, at low cost, good combination property, and market competition strength is strong.
Description
Technical field
The utility model relates to thin film technique field more particularly to a kind of high stretching puncture resistant goods packing films.
Background technique
Film type has monofilm, composite membrane and co-extrusion film, the mechanical strength and surface hardness of single thin film be lower,
The disadvantages of inflammable and poor heat resistance, limits its use scope, and co-extrusion film market is more wide.Wherein, multi-layer co-extruded technology is just
It is the extruder using 3 or more, by the resin raw material of different function such as PA, PE, PP etc., melting extrusion respectively, by respective
Runner converge in a die head, formed using inflation, cooling combined obtained multi-layer compound film.
Film made from co-extrusion process can meet the needs of various industrial packagings very well, but have dry type composite membrane without
The advantages of method is compared, the collocation by adjusting the thickness and a variety of different materials of each layer use, and can flexibly design difference
The film of draw ratio can also flexibly replace allotment heat-sealing layer material, meet the needs of Different Package.
With the development of industrial automation, more and more big companies are being packaged by worker and traditional semi-automatic are being beaten
Packet switchs to using full-automatic pack thread, and traditional wound film stretching multiple is low, and Resisting fractre ability is poor, and it is high to be unable to satisfy this high speed
The full automatic packaging device of stretching.For example, application No. is the Chinese patents of CN201610617646.3 to disclose a kind of high stretching
Heat-resistant PVC film formulation, the film use single layer structure, and main material is PVC, while adding a variety of aluminum sulfate, borax, over cure
The inorganic salts such as sour potassium have good heat resistance, but the inorganic salts added can not carry out the close of molecular level with film
In conjunction with full automatic packaging device high-speed stretch easily causes the local fracture of film in the process.The utility model design production
Height stretches puncture resistant goods packing film, has been well adapted for this high-speed full-automatic baling press to the performance requirement of film.
Utility model content
The utility model intends to solve the technical problem by providing a kind of high stretching puncture resistant goods packing films, compared to general
Logical film, the high of the utility model production stretch puncture resistant goods packing film, have high draw ratio, at low cost, comprehensive
The advantages such as energy is good, and market competition strength is strong.
The utility model is achieved by the following technical programs:
A kind of high stretching puncture resistant goods packing film, is formed and is bonded to each other by outer layer, middle layer and internal layer；It is described outer
Layer is the blend of metallocene linear-low density polyethylene resin and ethylene modified pet resin；It is described
Middle layer includes maleic anhydride grafting ldpe resin and graphene oxide modified low-density polyethylene resin；In described
Layer is polyamide.
Preferably, the graphene oxide is hydroxylating graphene, and hydroxy radical content is 15~20at%.
Preferably, the grafting rate of the maleic anhydride grafted polyethylene is 5~8%.
Preferably, the polyamide is polyamide-11 or polyamide -12.
Preferably, the outer layer with a thickness of 10 μm~30 μm.
Preferably, the middle layer with a thickness of 5 μm~15 μm.
Preferably, the internal layer with a thickness of 10 μm~20 μm.
The beneficial effects of the utility model are as follows:
By introducing polyamide-11 or polyamide -12 and metallocene linear-low density polyethylene material, make film that there is height
The characteristic of stretching, while the excellent properties of existing film are kept, corresponding intensity is improved after not only stretching, and introduces oxidation stone
Black alkene modified low-density polyethylene, is distributed widely in the graphene oxide of two-dimensional nanostructure in low density polyethylene (LDPE) chain, into
One step improves the mechanical property of film, the distinctive functional group of simultaneous oxidation graphene intercalation and graphite in low density polyethylene (LDPE)
The synergistic effect of alkene interlayer covalent bond, increases the elongation and draw ratio of film, to further enhance the drawing of film height
The characteristic stretched, film will not be broken easily in high speed packing process, keep film to have high retraction force and tack, to protect
Barrier has the effect of consolidation after being packaged.
The utility model film produced is adapted to automatically be packaged completely due to the characteristic with high draw ratio
Line compared with existing winding film, has apparent use cost advantage without human intervention.
Since metallocene linear-low density polyethylene contains a small amount of long-chain branch, be conducive to the entanglement for enhancing molecule interchain, and
The interaction force for improving molecule interchain, is acted synergistically by graphene oxide, further enhances film puncture resistance, make
Not the phenomenon that it not will cause tearing or is punctured in high speed packing process.
The utility model film also has the characteristics that transparency height, oil resistant, water-fast, weatherability.
Detailed description of the invention
Fig. 1 is the structural schematic diagram that the utility model height stretches puncture resistant goods packing film；
Wherein, 1, outer layer, 2, middle layer, 3, internal layer.
Specific embodiment
For a further understanding of the utility model, the utility model preferred embodiment is retouched below with reference to embodiment
It states, but it is to be understood that these descriptions are only the feature and advantage for further illustrating the utility model, rather than practical to this
The limitation of novel claim.
Embodiment 1
As shown in Figure 1, a kind of high stretching puncture resistant goods packing film, is made of outer layer, middle layer and internal layer；It is described outer
The composition and its parts by weight that layer includes:
300 parts by weight of metallocene linear-low density polyethylene；
Ethylene modified 500 parts by weight of polyethylene terephthalate；
The composition and its parts by weight that the middle layer includes:
Maleic anhydride is grafted 100 parts by weight of low density polyethylene (LDPE)；
40 parts by weight of graphene oxide modified low-density polyethylene；
The composition and its parts by weight that the internal layer includes:
100 parts by weight of polyamide-11；
The graphene oxide is hydroxylating graphene, hydroxy radical content 15at%.
The grafting rate of the maleic anhydride grafted polyethylene is 5%.
The melt index of the outer layer is 3.3g/10min, density 0.93g/cm3, with a thickness of 10 μm.
The melt index of the middle layer is 3.5g/10min, density 0.89g/cm3, with a thickness of 5 μm.
The melt index of the internal layer is 1.7g/10min, density 1.77g/cm3, with a thickness of 10 μm.
Height stretches the preparation method of puncture resistant goods packing film, comprising the following steps:
Step a respectively melts the outer layer of the film, middle layer and internal layer under conditions of temperature is 170 DEG C
It is plasticized 2h, respectively obtains melt I, melt II and melt III；
Step b forms melt I, melt II obtained in step a and melt III respectively with the extruded velocity of 0.6m/s
Green body is fixed in prefabricated mould by green body, and the rotation speed for controlling mold is 3rad/min, and obtaining viscosity is 800mPas
Parison；
Parison obtained in step b is carried out extrusion-blown modling by step c under the air pressure of 0.8MPa, and control blow-up ratio is 2:
1, draw ratio 20:1 carries out cooling and solidifying operation using cooling water with the flow velocity of 40L/min, obtains first product；
First product obtained in step c is carried out drawing-off by twin (double) screw extruder by step d, set the tension of drawing-off as
120kg/cm2, control draw ratio is 2, carries out winding packaging operation to get the high stretching puncture resistant goods packing film.
Twin (double) screw extruder is divided into seven humidity provinces, and first area's temperature is 170 DEG C, and second area's temperature is 190 DEG C, third area
Temperature is 210 DEG C, and the 4th area's temperature is 235 DEG C, and the 5th area's temperature is 245 DEG C, and the 6th area's temperature is 250 DEG C, District 7 temperature
It is 255 DEG C.
Embodiment 2
The present embodiment each component and its content and the preparation method is the same as that of Example 1, wherein the difference is that graphene oxide
Grafting rate for hydroxylating graphene, hydroxy radical content 18at%, maleic anhydride grafted polyethylene is 6%, and polyamide is
Polyamide -12, outer layer with a thickness of 20 μm, middle layer with a thickness of 10 μm, internal layer with a thickness of 15 μm.
Embodiment 3
The present embodiment each component and its content and the preparation method is the same as that of Example 1, wherein the difference is that graphene oxide
Grafting rate for hydroxylating graphene, hydroxy radical content 20at%, maleic anhydride grafted polyethylene is 8%, and polyamide is
Polyamide -12, outer layer with a thickness of 30 μm, middle layer with a thickness of 15 μm, internal layer with a thickness of 20 μm.
After tested, the high stretching puncture resistant goods packing film performance produced in Examples 1 to 3 is as shown in table 1:
Table 1
| Performance | Elongation/% | Tensile strength/MPa | Peel strength/N | Punctured resistance/N |
| Embodiment 1 | 480 | 50 | 3.1 | 7.1 |
| Embodiment 2 | 510 | 55 | 3.3 | 7.2 |
| Embodiment 3 | 580 | 60 | 4 | 7.8 |
By the result of table 1 as it can be seen that the high puncture resistant goods packing film that stretches of the utility model has high draw ratio, resists
The performance advantages such as fracture energy is strong and puncture resistant ability is strong.
Basic principles, main features, and advantages of the present invention has been shown and described above.Current row
The technical staff of industry is described in above embodiments and description it should be appreciated that the present utility model is not limited to the above embodiments
Only the principles of the present invention, the utility model also has respectively on the premise of not departing from the spirit and scope of the utility model
Kind changes and improvements, these changes and improvements are both fallen in the range of claimed invention.The requires of the utility model
Protection scope defined by appended claims and its equivalent.
Claims (5)
1. a kind of high stretching puncture resistant goods packing film, which is characterized in that be made of outer layer, middle layer and internal layer and mutually paste
It closes；The outer layer is being total to for metallocene linear-low density polyethylene resin and ethylene modified pet resin
Mixed object；The middle layer includes maleic anhydride grafting ldpe resin and graphene oxide modified low-density polyethylene tree
Rouge；The internal layer is polyamide.
2. high puncture resistant goods packing film is stretched according to claim 1, which is characterized in that the polyamide is
Polyamide-11 or polyamide -12.
High stretch puncture resistant goods packing film 3. according to claim 1, which is characterized in that the outer layer with a thickness of
10 μm~30 μm.
4. high stretching puncture resistant goods packing film according to claim 1, which is characterized in that the thickness of the middle layer
It is 5 μm~15 μm.
High stretch puncture resistant goods packing film 5. according to claim 1, which is characterized in that the internal layer with a thickness of
10 μm~20 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820945135.9U CN209096188U (en) | 2018-06-19 | 2018-06-19 | A kind of high stretching puncture resistant goods packing film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820945135.9U CN209096188U (en) | 2018-06-19 | 2018-06-19 | A kind of high stretching puncture resistant goods packing film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209096188U true CN209096188U (en) | 2019-07-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820945135.9U Active CN209096188U (en) | 2018-06-19 | 2018-06-19 | A kind of high stretching puncture resistant goods packing film |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209096188U (en) |
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2018
- 2018-06-19 CN CN201820945135.9U patent/CN209096188U/en active Active
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