CN104859948A - High impact force-resistant polyethylene heat shrink film and film blowing process - Google Patents
High impact force-resistant polyethylene heat shrink film and film blowing process Download PDFInfo
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- CN104859948A CN104859948A CN201510320236.8A CN201510320236A CN104859948A CN 104859948 A CN104859948 A CN 104859948A CN 201510320236 A CN201510320236 A CN 201510320236A CN 104859948 A CN104859948 A CN 104859948A
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Abstract
The invention discloses a high impact force-resistant polyethylene heat shrink film and relates to the technical field of packaging films. The inner layer and the outer layer of the high impact force-resistant polyethylene heat shrink film are formed by use of bimodal linear low density polyethylene, metallocene polyethylene and low-pressure high density polyethylene, while the middle layer of the high impact force-resistant polyethylene heat shrink film is formed by use of metallocene polyethylene, high-pressure low density polyethylene and low-pressure high density polyethylene; the falling tart impact strength of the polyethylene heat shrink film can be above 500g; the shrinkage ratio of the polyethylene heat shrink film is 15%-30% in the transverse direction and 50%-80% in the longitudinal direction; the tensile strength of the polyethylene heat shrink film is above 52mpa in the transverse direction (TD) and above 58mpa in the longitudinal direction (MD); in addition, the raw materials are mixed in an appropriate ratio; in the preparation process, the viscosity of the metal is greatly reduced in contrast with single use of the linear low density polyethylene, and the energy consumption is reduced by above 32% in contrast with single use of the linear low density polyethylene.
Description
Technical field
The present invention relates to packing film technical field, particularly relate to a kind of anti-high impact forces polyethylene heat-shrinkage film and film-blowing process thereof.
Background technology
Heat shrink films is that one is directed stretching in process of production, in use the thermoplastic film of heat shrinkable, and for sale and the transport of various product, its Main Function is firmly, hides and protection product.Shrink film must have higher paracentesis resistance, good contractibility and certain shrink stress.Divide by material, heat shrink films comprises PE heat shrink films, POF heat shrink films etc.
Wherein, polyethylene heat-shrinkage film, because the performance of its excellence, becomes a use class heat shrink films widely.But in the use field that some is special, require that polyethylene heat-shrinkage film has excellent shock resistance, and existing polyethylene heat-shrinkage film, its dart impact strength, often not higher than 300g, can not meet its use at special dimension.
Summary of the invention
An object of the present invention, is just to provide one to solve the problem, a kind of anti-high impact forces polyethylene heat-shrinkage film.
To achieve these goals, the technical solution used in the present invention is such: a kind of anti-high impact forces polyethylene heat-shrinkage film, is characterized in that: be co-extruded by internal layer, interlayer and skin, wherein,
Described internal layer and outer field raw material are by following forming by mass percentage:
Bimodal linear low density polyethylene 20-40%
Metallocene PE 50-70%
Low-pressure high-density polyethylene 2-18%;
The raw material of described interlayer is by following forming by mass percentage:
Metallocene PE 30-50%
Hp-ldpe 30-50%;
Low-pressure high-density polyethylene 10-30%.
The present inventor, by a large amount of tests, proves to adopt suitable raw material and ratio, can, under the prerequisite ensureing other mechanical properties of polyethylene heat-shrinkage film such as pulling strengrth, shrinkage percentage, the impact resistance of polyethylene heat-shrinkage film be improved greatly.
As preferred technical scheme: described internal layer and outer field raw material are by following forming by mass percentage:
Bimodal linear low density polyethylene 30.8%
Metallocene PE 60.1%
Low-pressure high-density polyethylene 9.1%;
The raw material of described interlayer is by following forming by mass percentage:
Metallocene PE 40.5%
Hp-ldpe 39.5%;
Low-pressure high-density polyethylene 20%.
Adopt aforementioned proportion, best impact resistance can be reached.
Object two of the present invention, be the film-blowing process providing a kind of aforementioned anti-high impact forces polyethylene heat-shrinkage film, the technical scheme adopted is: after each layer raw material mixing and stirring, extrude obtained by three-layer co-extruded machine.
Compared with prior art, the invention has the advantages that: the dart impact strength of polyethylene heat-shrinkage film of the present invention can reach more than 500g; Shrinkage percentage: the longitudinal 50%-80% of horizontal 15%-30%; Pulling strengrth: laterally (TD): more than 52mpa, longitudinally (MD): more than 58mpa; In addition, above-mentioned raw materials is adopted suitable ratio mixing, in preparation process, the viscosity of melt adopts more separately linear low density polyethylene greatly to reduce, and its energy consuming ratio adopts separately linear low density polyethylene to reduce by more than 32%.
Detailed description of the invention
Below in conjunction with embodiment, the invention will be further described.
Embodiment 1:
Internal layer and skin:
Bimodal linear low density polyethylene (
llDPE, FB2230, Borealis) 30.8%
Metallocene PE (MVLDPE, 2703HH, Exxon Mobil) 60.1%
Low-pressure high-density polyethylene (5621D, CSPC) 9.1%;
Interlayer:
Metallocene PE (MVLDPE, 2703HH, Exxon Mobil) 40.5%
Hp-ldpe (2420D, CSPC) 39.5%;
Low-pressure high-density polyethylene (5621D, CSPC) 20%;
After above-mentioned each layer raw material mixing and stirring, extrude obtained product A by three-layer co-extruded machine.
The present embodiment adopts the raw material preparation of the specific trade mark of particular vendors, obtains the polyethylene heat-shrinkage film with the especially anti-high impact forces of high-quality.
Embodiment 2:
The product A performance testing of embodiment 1
Product A obtained for embodiment 1 is carried out properties of product test, and testing standard is all according to the relevant GB of the industry, and its result is:
Dart impact strength is 589g; Shrinkage percentage: laterally (TD) 21% longitudinally (MD) 69%; Pulling strengrth: laterally (TD): 56mpa, longitudinally (MD): 59mpa;
In addition, adopt separately polyethylene heat-shrinkage film prepared by bimodal linear low density polyethylene, adopt identical condition and method to test, its dart impact strength is 403g, and the product A that its energy consuming ratio prepares equal in quality is high by 35%.
The foregoing is only preferred embodiment of the present invention, not in order to limit this present invention, all do within this spirit of the present invention and principle any amendment, equivalently to replace and improvement etc., all should be included within this protection scope of the present invention.
Claims (3)
1. an anti-high impact forces polyethylene heat-shrinkage film, is characterized in that: be co-extruded by internal layer, interlayer and skin, wherein,
Described internal layer and outer field raw material are by following forming by mass percentage:
Bimodal linear low density polyethylene 20-40%
Metallocene PE 50-70%
Low-pressure high-density polyethylene 2-18%;
The raw material of described interlayer is by following forming by mass percentage:
Metallocene PE 30-50%
Hp-ldpe 30-50%;
Low-pressure high-density polyethylene 10-30%.
2. the anti-high impact forces polyethylene heat-shrinkage film of one according to claim 1, is characterized in that:
Described internal layer and outer field raw material are by following forming by mass percentage:
Bimodal linear low density polyethylene 30.8%
Metallocene PE 60.1%
Low-pressure high-density polyethylene 9.1%;
The raw material of described interlayer is by following forming by mass percentage:
Metallocene PE 40.5%
Hp-ldpe 39.5%;
Low-pressure high-density polyethylene 20%.
3. the film-blowing process of the anti-high impact forces polyethylene heat-shrinkage film of claim 1 or 2 any one, is characterized in that: after each layer raw material mixing and stirring, extrude obtained by three-layer co-extruded machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510320236.8A CN104859948A (en) | 2015-06-12 | 2015-06-12 | High impact force-resistant polyethylene heat shrink film and film blowing process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510320236.8A CN104859948A (en) | 2015-06-12 | 2015-06-12 | High impact force-resistant polyethylene heat shrink film and film blowing process |
Publications (1)
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| CN104859948A true CN104859948A (en) | 2015-08-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510320236.8A Pending CN104859948A (en) | 2015-06-12 | 2015-06-12 | High impact force-resistant polyethylene heat shrink film and film blowing process |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107498965A (en) * | 2017-07-07 | 2017-12-22 | 河间市精诚塑业有限公司 | A kind of super-thin low-voltage thermoplastic film and its preparation technology |
| CN109016761A (en) * | 2018-08-10 | 2018-12-18 | 顺丰速运有限公司 | Plastic foil and courier bag |
| CN109733035A (en) * | 2019-01-12 | 2019-05-10 | 山东中塑泰富科技有限公司 | A kind of ultra-thin heavy packaging heat shrink films |
| CN111806026A (en) * | 2020-07-21 | 2020-10-23 | 江门市华龙膜材股份有限公司 | Disposable medical wrist strap film and preparation method thereof |
| CN113896975A (en) * | 2021-08-25 | 2022-01-07 | 江苏瑞泽丰标准技术服务有限公司 | Polyethylene shrink film based on electron irradiation crosslinking and preparation method thereof |
| CN114603958A (en) * | 2022-03-09 | 2022-06-10 | 河间市精诚塑业有限公司 | Heat shrinkable film and preparation method thereof |
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| US5998017A (en) * | 1996-03-12 | 1999-12-07 | Tenneco Packaging | Stretch wrap films |
| US6582828B1 (en) * | 1998-07-10 | 2003-06-24 | Wolff Walsrode Ag | Deep-drawn slidable foil based on polyolefins and polyamide |
| CN1608841A (en) * | 2003-09-24 | 2005-04-27 | 埃克森美孚化学专利公司 | Collation shrink |
| CN101111375A (en) * | 2005-02-09 | 2008-01-23 | 伊奎斯塔化学有限公司 | Multilayer polyethylene thin films |
| CN101516621A (en) * | 2006-09-22 | 2009-08-26 | 北方科技有限公司 | Multilayer film |
| CN103802424A (en) * | 2013-12-26 | 2014-05-21 | 上海优珀斯材料科技有限公司 | Polyethylene strong cross laminated composite film and production process thereof |
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2015
- 2015-06-12 CN CN201510320236.8A patent/CN104859948A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5998017A (en) * | 1996-03-12 | 1999-12-07 | Tenneco Packaging | Stretch wrap films |
| US6582828B1 (en) * | 1998-07-10 | 2003-06-24 | Wolff Walsrode Ag | Deep-drawn slidable foil based on polyolefins and polyamide |
| CN1608841A (en) * | 2003-09-24 | 2005-04-27 | 埃克森美孚化学专利公司 | Collation shrink |
| CN101111375A (en) * | 2005-02-09 | 2008-01-23 | 伊奎斯塔化学有限公司 | Multilayer polyethylene thin films |
| CN101516621A (en) * | 2006-09-22 | 2009-08-26 | 北方科技有限公司 | Multilayer film |
| CN103802424A (en) * | 2013-12-26 | 2014-05-21 | 上海优珀斯材料科技有限公司 | Polyethylene strong cross laminated composite film and production process thereof |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107498965A (en) * | 2017-07-07 | 2017-12-22 | 河间市精诚塑业有限公司 | A kind of super-thin low-voltage thermoplastic film and its preparation technology |
| CN107498965B (en) * | 2017-07-07 | 2019-03-12 | 河间市精诚塑业有限公司 | A kind of super-thin low-voltage thermoplastic film and its preparation process |
| CN109016761A (en) * | 2018-08-10 | 2018-12-18 | 顺丰速运有限公司 | Plastic foil and courier bag |
| CN109733035A (en) * | 2019-01-12 | 2019-05-10 | 山东中塑泰富科技有限公司 | A kind of ultra-thin heavy packaging heat shrink films |
| CN111806026A (en) * | 2020-07-21 | 2020-10-23 | 江门市华龙膜材股份有限公司 | Disposable medical wrist strap film and preparation method thereof |
| CN111806026B (en) * | 2020-07-21 | 2021-11-23 | 江门市华龙膜材股份有限公司 | Disposable medical wrist strap film and preparation method thereof |
| CN113896975A (en) * | 2021-08-25 | 2022-01-07 | 江苏瑞泽丰标准技术服务有限公司 | Polyethylene shrink film based on electron irradiation crosslinking and preparation method thereof |
| CN114603958A (en) * | 2022-03-09 | 2022-06-10 | 河间市精诚塑业有限公司 | Heat shrinkable film and preparation method thereof |
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Application publication date: 20150826 |