CN103753914A - Five-layer co-extrusion packaging material having high moisture barrier and barrier properties and preparation method thereof - Google Patents
Five-layer co-extrusion packaging material having high moisture barrier and barrier properties and preparation method thereof Download PDFInfo
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- CN103753914A CN103753914A CN201410007842.XA CN201410007842A CN103753914A CN 103753914 A CN103753914 A CN 103753914A CN 201410007842 A CN201410007842 A CN 201410007842A CN 103753914 A CN103753914 A CN 103753914A
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Abstract
The invention provides a multi-layer co-extrusion packaging material having high moisture barrier and barrier properties and a preparation method of the multi-layer co-extrusion packaging material; and the five-layer co-extrusion packaging material disclosed by the invention comprises a polyethylene layer having high intensity and good adaptation as the first layer, a barrier layer as the second layer, an ultra-fine and ultra-strong water absorbent modified polyethylene layer as the third layer, a barrier layer as the fourth layer and a high-speed thermal sealing layer having excellent chemical stability as the fifth layer, wherein various layers are contacted with each other in sequence. In the multi-layer co-extrusion packaging material having high moisture barrier and barrier properties disclosed by the invention, the ultra-fine and ultra-strong water absorbent modified polyethylene layer has the strong function of absorbing moisture; other layers respectively have good barrier, thermal sealing and printable properties; in addition, by means of reasonable structural design and material selection, various layers have excellent packaging material having high moisture barrier and barrier properties. The five-layer co-extrusion packaging material disclosed by the invention has excellent moisture barrier property; simultaneously, other barrier properties (barrier of oxygen, nitrogen and the like) are also excellent; furthermore, the cost can be effectively reduced; and the processing technique is simple.
Description
Technical field
?
The invention belongs to field of packaging material, relate in particular to that a kind of high resistant is wet, high-barrier five-layer co-squeezing packaging material and preparation method thereof.
Background technology
Along with the progress of Chemical Engineering Technology, the functionalization development trend of plastic film is day by day obvious, and wherein, high-barrier plastic film is one of function film at present with fastest developing speed.High-resistant diaphragm refers to that protection package is content-filled, avoids the small-molecule substances such as pollutant and oxygen, steam, liquid and smell to infiltrate, and also can prevent the packing film that packing content thing oozes out simultaneously.The high barrier of high-resistant diaphragm refers to that in temperature be under 23 ℃, the relative humidity standard state that is 65%, the transit dose < 5ml/m of oxygen
2below day, the transit dose < 2g/m of water vapour
2d.
Traditional high-resistant diaphragm adopts plastic-aluminum combined film production conventionally, although barrier property is outstanding, but it is several all over bonding to adopt adhesive to carry out, not only manufacturing procedure is many, cost is high, environmental pollution is large, and the aluminium foil using on composite membrane, after bending, be easy to produce fracture, greatly reduce the barrier of high-resistant diaphragm.Meanwhile, the high-resistant diaphragm of plastic-aluminum combined film production is because plastic-aluminum combined causing is difficult to recycling together.Currently available technology discloses the good transparent resin of multiple barrier property, as vinylidene chloride copolymer (PVDC), vinyl cyanide polymer (PAN), ethene-ethenol copolymer (EVOH), polyester terephthalate (PET), crystallinity polyamide etc.Therein ethylene-ethenol copolymer, polyester terephthalate, crystallinity polyamide are as a kind of high-performance separated packaging material, also there is certain shortcoming, mainly in certain humidity situation, the barrier of its goods has certain amplitude and declines, at present in this respect by not good to the chemistry of this different materials, physical modification effect.
Summary of the invention
The technical problem to be solved in the present invention is to provide that a kind of high resistant is wet, high-barrier five-layer co-squeezing packaging material and preparation method thereof, preparation method provided by the invention is by carrying out physical modification and layer structure being carried out to reasonably optimizing to material, the five-layer co-squeezing material obtaining shows very excellent aspect blocking oxygen, nitrogen, nitrogen dioxide and steam, and cost also can significantly reduce.
In order to achieve the above object, the present invention realizes by following technical proposal:
A kind of high resistant is wet, high-barrier five-layer co-squeezing packaging material, comprise the first compound successively high-strength polyethylene layer, the second barrier layer, the 3rd ultra-fine, super strength water absorbent modified poly ethylene layer, the 4th layer of barrier layer, the high speed hot sealing layer that layer 5 chemical stability is splendid, this five-layer co-squeezing goes out composite.
One or more blend in high density polyethylene (HDPE) (HDPE), low density polyethylene (LDPE) (LDPE) and LLDPE (LLDPE) of described the first high-strength polyethylene layer form, and its melt index is at 0.5-50g/10min(230 ℃/2.16Kg) be good.
Described the second barrier layer is the barrier layer resin of a kind of formation in ethylene-vinyl alcohol copolymer (EVOH), polyvinylidene chloride (PVDC), polyamide (PA).
Described the 3rd ultra-fine, super strength water absorbent modified poly ethylene layer is by ultra-fine, super strength water absorbent filled polyethylene and form, and it is ultra-fine, super strength water absorbent is mainly by calcium oxide (CaO), calcium chloride (CaCl
2), zinc chloride (ZnCl
2) in one or more blends form, its particle diameter is 0.1-100 micron; One or more blend in high density polyethylene (HDPE), low density polyethylene (LDPE) and LLDPE of described polyethylene form; In described ultra-fine, super strength water absorbent modified poly ethylene, to account for the mass fraction of this modified layer be 30-70% to the content of water absorbing agent.
Described the 4th barrier layer is a kind of barrier layer resin forming in ethylene-vinyl alcohol copolymer, polyamide (PA).
A kind of formation of described the 5th high speed hot sealing layer in high density polyethylene (HDPE) (HDPE), low density polyethylene (LDPE) (LDPE), LLDPE (LLDPE), polypropylene (PP).
The present invention also provides that a kind of high resistant is wet, the preparation method of high-barrier five-layer co-squeezing packaging material, comprises the following steps:
By the splendid high speed hot sealing layer of the first high-strength polyethylene layer, the second barrier layer, the 3rd ultra-fine super strength water absorbent modified poly ethylene layer, the 4th layer of barrier layer and the 5th chemical stability by co-extrusion equipment co-extrusion modling, obtain comprising the first high-strength polyethylene layer of contacting successively, the second barrier layer, the 3rd ultra-fine, super strength water absorbent modified poly ethylene layer, the 4th layer of barrier layer, the compound package material of the high speed hot sealing layer that layer 5 chemical stability is splendid; By described five layers of composite co-extruding packaging material, cooling and shaping; Described five layers of composite co-extruding packaging material outer layer surface are carried out to sided corona treatment.
Compared with prior art, the beneficial effect of wet, high-barrier five-layer co-squeezing packaging material of a kind of high resistant provided by the invention and preparation method thereof is:
1, this five-layer co-squeezing goes out packaging material, rational layer structural design, and especially middle the 3rd layer of ultra-fine water absorbing agent modified poly ethylene layer, has effectively solved EVOH and the polyamide material defect that barrier property easily declines under high humidity environment.
2, this five-layer co-squeezing goes out not only moisture barrier property excellence of packaging material, has kept other barrier properties (blocking oxygen, nitrogen etc.) also very outstanding simultaneously, can effectively reduce cost, and processing technology is simple simultaneously.
Accompanying drawing explanation
Fig. 1 is that high resistant provided by the invention is wet, high-barrier five-layer co-squeezing packing timber bed of material structural representation.
In figure: 1, the first polyethylene layer; 2, the second barrier layer; 3, the 3rd water absorbing agent modified poly ethylene layer; 4, the 4th barrier layer; 5, the 5th high speed hot sealing layer.
The specific embodiment
By LLDPE resin, PA6 resin, be pre-mixed uniform 30% calcium oxide/LLDPE composite, EVOH resin, HDPE resin and join successively respectively in five extruder hoppers that five-layer co-squeezing goes out machine, set technological temperature and the screw speed of each material, co-extrusion modling, obtains comprising that the LLDPE/PA6/30%CaO+LLDPE/EVOH/HDPE five-layer co-squeezing contacting successively goes out compound package material; By described five layers of composite co-extruding packaging material, cooling and shaping, outer layer surface carries out sided corona treatment, obtains that high resistant is wet, high-barrier five-layer co-squeezing packaging material, and it intercepts moisture barrier property as table 1.
embodiment 2
By HDPE resin, EVOH resin, be pre-mixed uniform 50% calcium oxide/LLDPE composite, EVOH resin, LDPE resin and join successively respectively in five extruder hoppers that five-layer co-squeezing goes out machine, set technological temperature and the screw speed of each material, co-extrusion modling, obtains comprising that the HDPE/EVOH/50%CaO+LLDPE/EVOH/LDPE five-layer co-squeezing contacting successively goes out compound package material; By described five layers of composite co-extruding packaging material, cooling and shaping, outer layer surface carries out sided corona treatment, obtains that high resistant is wet, high-barrier five-layer co-squeezing packaging material, and it intercepts moisture barrier property as table 1.
embodiment 3
By LLDPE resin, EVOH resin, be pre-mixed uniform 70% calcium oxide/LLDPE composite, EVOH resin, PP resin and join successively respectively in five extruder hoppers that five-layer co-squeezing goes out machine, set technological temperature and the screw speed of each material, co-extrusion modling, obtains comprising that the LLDPE/EVOH/70%CaO+LLDPE/EVOH/PP five-layer co-squeezing contacting successively goes out compound package material; By described five layers of composite co-extruding packaging material, cooling and shaping, outer layer surface carries out sided corona treatment, obtains that high resistant is wet, high-barrier five-layer co-squeezing packaging material, and it intercepts moisture barrier property as table 1.
By LDPE resin, PVDC resin, be pre-mixed uniform 50% calcium chloride/LDPE composite, EVOH resin, LLDPE resin and join successively respectively in five extruder hoppers that five-layer co-squeezing goes out machine, set technological temperature and the screw speed of each material, co-extrusion modling, obtains comprising the LDPE/PVDC/50% CaCl contacting successively
2+ LDPE/EVOH/LLDPE five-layer co-squeezing goes out compound package material; By described five layers of composite co-extruding packaging material, cooling and shaping, outer layer surface carries out sided corona treatment, obtains that high resistant is wet, high-barrier five-layer co-squeezing packaging material, and it intercepts moisture barrier property as table 1.
By LLDPE resin, PA6 resin, be pre-mixed uniform 40% zinc chloride/HDPE composite, PA6 resin, HDPE resin and join successively respectively in five extruder hoppers that five-layer co-squeezing goes out machine, set technological temperature and the screw speed of each material, co-extrusion modling, obtains comprising the LLDPE/PA6/40% ZnCl contacting successively
2+ HDPE/PA6/HDPE five-layer co-squeezing goes out compound package material; By described five layers of composite co-extruding packaging material, cooling and shaping, outer layer surface carries out sided corona treatment, obtains that high resistant is wet, high-barrier five-layer co-squeezing packaging material, and it intercepts moisture barrier property as table 1.
embodiment 6
By LLDPE resin, PVDC resin, be pre-mixed uniform 30% calcium oxide and 20% calcium chloride/LLDPE composite, EVOH resin, PP resin and join successively respectively in five extruder hoppers that five-layer co-squeezing goes out machine, the technological temperature and the screw speed co-extrusion modling that set each material, obtain comprising successively mutually compound LLDPE/PVDC/30%CaO+20% CaCl
2+ LLDPE/EVOH/PP five-layer co-squeezing goes out compound package material; By described five layers of composite co-extruding packaging material, cooling and shaping, outer layer surface carries out sided corona treatment, obtains that high resistant is wet, high-barrier five-layer co-squeezing packaging material, and it intercepts moisture barrier property as table 1.
For characteristic of the present invention is better described, special with at present more common a five-layer co-squeezing goes out material and contrasts, as follows:
comparative example 1
LLDPE resin, PVDC resin, LLDPE resin, EVOH resin, PP resin are joined respectively in five extruder hoppers that five-layer co-squeezing goes out machine successively, set technological temperature and the screw speed co-extrusion modling of each material, obtain comprising that the LLDPE/PVDC/LLDPE/EVOH/PP five-layer co-squeezing contacting successively goes out compound package material; By described five layers of composite co-extruding packaging material, cooling and shaping, outer layer surface carries out sided corona treatment, obtains that high resistant is wet, high-barrier five-layer co-squeezing packaging material, and it intercepts moisture barrier property as table 1.
The barrier property table of table 1 material
| Embodiment | Oxygen transmission rate (cc/m2.day) | Rate of perviousness (cc/m2.day) |
| |
0.86 | 1.15 |
| Embodiment 2 | 0.77 | 1.04 |
| Embodiment 3 | 0.60 | 1.51 |
| |
0.54 | 0.87 |
| |
0.61 | 0.94 |
| Embodiment 6 | 0.52 | 0.75 |
| Comparative example 1 | 2.1. | 2.5 |
From material property, relatively can find that this high resistant is wet, high-barrier five-layer co-squeezing packaging material are being significantly improved aspect resistance oxygen and moisture barrier property compared with comparative example.
The present invention adopts coextrusion blow technique to prepare transparency high barrier film, production process is comparatively simple, described screw extruder is not particularly limited, and those skilled in the art can carry out the adjustment of coextrusion parameter according to the performance of used screw extruder model and target transparency high barrier film.The above is only the preferred embodiment of the present invention; 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 make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (9)
1. wet, the high-barrier five-layer co-squeezing packaging material of high resistant, comprise the first mutually compound successively polyethylene layer, the second barrier layer, the 3rd water absorbing agent modified poly ethylene layer, the 4th barrier layer, the 5th high speed hot sealing layer.
2., high-barrier five-layer co-squeezing packaging material wet according to the high resistant described in claim 1, is characterized in that, one or more blend in high density polyethylene (HDPE), low density polyethylene (LDPE) and LLDPE of described the first polyethylene layer form.
3., high-barrier five-layer co-squeezing packaging material wet according to the high resistant described in claim 1, is characterized in that described the second barrier layer is a kind of barrier layer resin forming in ethylene-vinyl alcohol copolymer, polyvinylidene chloride, polyamide.
4., high-barrier five-layer co-squeezing packaging material wet according to the high resistant described in claim 1, is characterized in that, described the 3rd water absorbing agent modified poly ethylene layer consists of water absorbing agent filled polyethylene.
5., high-barrier five-layer co-squeezing packaging material wet according to the high resistant described in claim 4, is characterized in that, described water absorbing agent one or more blends in calcium oxide, calcium chloride, zinc chloride form.
6., high-barrier five-layer co-squeezing packaging material wet according to the high resistant described in claim 4, it is characterized in that, one or more blend in high density polyethylene (HDPE), low density polyethylene (LDPE) and LLDPE of described polyethylene form, and in water absorbing agent modified poly ethylene, to account for the mass fraction of this modified layer be 30-70% to the content of water absorbing agent.
7., high-barrier five-layer co-squeezing packaging material wet according to the high resistant described in claim 1, is characterized in that described the 4th barrier layer is a kind of barrier layer resin forming in ethylene-vinyl alcohol copolymer, polyamide.
8., high-barrier five-layer co-squeezing packaging material wet according to the high resistant described in claim 1, is characterized in that, a kind of in high density polyethylene (HDPE), low density polyethylene (LDPE), LLDPE, polypropylene forms described the 5th high speed hot sealing layer.
9. a preparation method for wet, the high-barrier five-layer co-squeezing packaging material of the high resistant described in any one in claim 1-8, comprises the following steps:
The first polyethylene layer, the second barrier layer, the 3rd water absorbing agent modified poly ethylene layer, the 4th barrier layer and the 5th high speed hot sealing layer are passed through to co-extrusion equipment co-extrusion modling, obtain comprising the first polyethylene layer, the second barrier layer, the 3rd water absorbing agent modified poly ethylene layer, the 4th layer of barrier layer of phase composite contact successively, the compound package material of layer 5 high speed hot sealing layer; By described five layers of composite co-extruding packaging material, cooling and shaping; Described co-extrusion packaging material outer layer surface is carried out to sided corona treatment.
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| CN104309923A (en) * | 2014-09-02 | 2015-01-28 | 江阴宝柏包装有限公司 | Intelligent high-barrier property cold forming laminating material and preparation method for same |
| CN104476875A (en) * | 2015-01-14 | 2015-04-01 | 重庆科欣塑料有限公司 | Polyolefin thin film with drying agent function and manufacturing method of polyolefin thin film with drying agent function |
| CN104966800A (en) * | 2015-07-13 | 2015-10-07 | 苏州锂盾储能材料技术有限公司 | Functional composite packaging aluminum plastic film for lithium battery |
| CN105034504A (en) * | 2015-05-22 | 2015-11-11 | 苏州天加新材料股份有限公司 | High-barrier-property multilayer-co-extrusion packaging film |
| CN105109830A (en) * | 2015-08-11 | 2015-12-02 | 福建农林大学 | Packaging method for adult monochamus alternatus attractant lure core |
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| CN107662386A (en) * | 2016-07-27 | 2018-02-06 | 海口未来技术研究院 | High-resistant diaphragm for aerostatics and its preparation method and application |
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| CN104309923B (en) * | 2014-09-02 | 2017-07-28 | 江阴宝柏包装有限公司 | The preparation method of intellectuality high barrier cold forming laminated material |
| CN104309923A (en) * | 2014-09-02 | 2015-01-28 | 江阴宝柏包装有限公司 | Intelligent high-barrier property cold forming laminating material and preparation method for same |
| CN104476875A (en) * | 2015-01-14 | 2015-04-01 | 重庆科欣塑料有限公司 | Polyolefin thin film with drying agent function and manufacturing method of polyolefin thin film with drying agent function |
| CN105034504A (en) * | 2015-05-22 | 2015-11-11 | 苏州天加新材料股份有限公司 | High-barrier-property multilayer-co-extrusion packaging film |
| CN104966800A (en) * | 2015-07-13 | 2015-10-07 | 苏州锂盾储能材料技术有限公司 | Functional composite packaging aluminum plastic film for lithium battery |
| CN105109830A (en) * | 2015-08-11 | 2015-12-02 | 福建农林大学 | Packaging method for adult monochamus alternatus attractant lure core |
| US10920115B2 (en) | 2015-08-31 | 2021-02-16 | Dow Global Technologies Llc | Resins for use as tie layer in multilayer structure and multilayer structures comprising the same |
| CN107662386A (en) * | 2016-07-27 | 2018-02-06 | 海口未来技术研究院 | High-resistant diaphragm for aerostatics and its preparation method and application |
| CN107351502A (en) * | 2017-07-20 | 2017-11-17 | 江阴申隆包装材料有限公司 | A kind of composite sheet and its manufacture method with high temperature resistant and insulation |
| CN110499118A (en) * | 2019-07-30 | 2019-11-26 | 云谷（固安）科技有限公司 | Screen protecting film and its manufacturing method, electronic equipment |
| CN111055560A (en) * | 2019-12-04 | 2020-04-24 | 江阴宝柏包装有限公司 | Dry powder inhalant packaging film |
| WO2022105198A1 (en) * | 2020-11-23 | 2022-05-27 | 上海若祎新材料科技有限公司 | Modified polyolefin composite film composition, modified polyolefin composite film, preparation method therefor and use thereof |
| CN115366513A (en) * | 2022-08-10 | 2022-11-22 | 中国辐射防护研究院 | Transparent high-barrier composite material and preparation method thereof |
| CN115366513B (en) * | 2022-08-10 | 2024-01-23 | 中国辐射防护研究院 | Transparent high-barrier composite material and preparation method thereof |
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Application publication date: 20140430 |