CN103538300A - Heat-sealing composite barrier film and preparation method thereof - Google Patents
Heat-sealing composite barrier film and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a heat-sealing composite barrier film and a preparation method thereof. The heat-sealing composite barrier film is characterized in that the thickness of a PE (Poly Ethylene) layer is non-uniform, wherein the edge of the PE layer is thick and the middle of the PE layer is thin; the cross section of the PE layer is a rectangle without an arc or trapezoid. The heat-sealing composite barrier film disclosed by the invention has the advantages that the thickness of the PE layer can be increased, the bonding strength of the seal can be improved, and the phenomenon of air leakage at the heat seal is avoided; the thickness of the PE layer can be increased while the phenomenon of mutual contact of Al layers in heat-sealing pressing can be avoided, and the edge effect and heat bridge effect are avoided; by adopting the structure with thick edge and thin middle, the PE material can be saved, the cost is lowered, and unnecessary resource waste is reduced, so that the composite barrier film has environment-friendly and energy-saving effects. The novel heat-sealing composite barrier film can be applied to the vacuum insulated panel industry as well as the field of barrier films with high requirement on the seal strength and good sealing property or the field requiring prevention of heat bridge effect such as vacuum insulated panels.
Description
Technical field
The present invention relates to a kind of heat-sealing composite barrier film, particularly relate to a kind of heat-sealing composite barrier film of the PE of containing layer structure.
Background technology
Heat-sealing hermetic barrier film, can make core and atmosphere outside isolation, can form the space of high vacuum after vacuumizing.This structure both can keep the low thermal conductivity of vacuum, can solve again the atmospheric pressure problem that heat radiation and core material bear.Plastics (as polyester, Vingon, polypropylene and polyvinyl alcohol) are widely used container materials, also can be used for hot sealing layer.Obstruct membrane material can or glue together with adhesive by heat-sealing, needs to guarantee difficulty or ease and the durability of sealing, and while making to make, bag can be not damaged.Heat-sealing hermetic barrier film is by compound compositions such as PE layer, Al layer, pet layers, and each has different effects by oneself: PE layer is used to form heat-sealing sealing; Al layer can prevent the infiltration of steam and air; Pet layer rises and prevents gas permeation, and is the protective layer of vacuum heat-insulating plate.
In the < < construction material > > periodical of publishing in July, 2003, in " impact of surperficial barrier film on vacuum heat-insulating plate performance " literary composition, disclose in existing vacuum insulation board industry, edge effect is excessive and affect the present situation of heat-proof quality: at vacuum insulation board industry, because the heat conductivility of surface film material is high more a lot of than core material of vacuum heat insulation plate, therefore the thickness that, reduces surface film can reduce the negative effect to vacuum heat-insulating plate heat-proof quality.In most of the cases, in order to obtain the vacuum heat-insulating plate that sealing property is good, sealing gland performance is good, mechanical strength is high simultaneously, generally adopt the surface film material of appearance metal level, the lining plastic bed of material.The metal adopting in this class film again with aluminium foil for the most common.But the thermal conductivity factor of aluminium foil is high, be approximately more than 1000 times of common plastics, be 20,000 of core material of vacuum heat insulation plate～100,000 times.In VIP structure, core is coated in barrier layer and the rear encapsulation of finding time.No matter which kind of material core or barrier layer select, and barrier layer can form heat bridge in its edge during for coated core, produces heat bridge effect.The generation of heat bridge effect is inevitably, is mainly to run off because sheet material and the formed edge of surrounding environment heat passage make part heat, causes sheet material overall thermal conductivity to increase, thereby makes its whole heat-insulating property decline.For metallized composite membrane, this growth can be ignored; And for typical Metal Substrate VIP, this growth can reach 64% even 380%, has greatly affected the whole result of use of VIP sheet material.As can be seen here, VIP edge heat bridge effect is analyzed with research and had great importance.
In addition in vacuum insulation board industry in recent years, experiment detect and engineering application in find to seal gas leak phenomenon and because PE layer is crossed the phenomenon that thin Al layer contacts with each other the heat bridge effect causing.
Summary of the invention
Object of the present invention is intended to overcome the deficiencies in the prior art, and a kind of raising sealing bond strength is provided, and avoids sealing gas leak phenomenon, reduces the method for heat bridge effect.
For realizing the technical scheme of object employing of the present invention, be: a kind of heat-sealing composite barrier film is provided, and heat-sealing composite barrier film is generally composited by pet layer 10, Al layer 20, PE layer 30 etc.A composite barrier film, is composited by pet layer, Al layer, PE layer etc., it is characterized in that PE layer thickness is inhomogeneous, presses the thick intermediate thin of film material lengthwise edge, and is laterally having dividing strip; PE is laminated is plane, and another side cross section is arc or groove type, and plane is compound with Al layer inwardly, and arc-shaped concave district or groove mouth outwardly, are heat-sealing adhesive linkages; PE layer is fireproof N-burning PE; The thickness of PE layer changes in certain scope, and the thickness of locating PE layer at the thickest edge is 40～100 μ m, and the thickness of the thinnest middle part is 20～40 μ m; The horizontal street medians width of PE layer is 20～50mm, and thickness is 30～50 μ m, and spacing is 300～500mm.
The invention also discloses a kind of preparation method who seals composite barrier film, it is characterized in that comprising the step of following order:
(1) PET/Al composite membrane is placed on film device;
(2) amount of dripping and the speed of the liquid phase P E of zones of different are set;
(3) regulate the translational speed of Obstruct membrane, control the thickness of PE layer between 20 μ m and 100 μ m;
(4) every 5-10 second, the speed of PE film is set to homogeneity value, obtains the PE film band of even thickness;
(5) even film 1-3 second, form horizontal dividing strip;
(6) after film, in the place of Obstruct membrane thickness maximum, film is cut out, obtained heat-sealing composite barrier film.
Effect: the present invention compared with prior art, has the following advantages:
(1) thickness of increase PE layer can increase the bond strength of sealing, avoids occurring the phenomenon of hot-seal gas leakage.
(2) phenomenon that the Al layer occurring when the thickness of increase PE layer can avoid heat-sealing to press simultaneously contacts with each other, the thermal conductivity factor of aluminium film is greatly 273W/ (mK), there will be the phenomenon of serious thermal conductivity factor rising if there is the contact of Al film.
(3) because PE material price is expensive, the whole thickness that increases PE could cause the sharply rising of cost! Adopt the structure of the thick intermediate thin in edge can save PE material, reduce costs, reduce the waste of unnecessary resource, environmental protection and energy saving.
Accompanying drawing explanation
Fig. 1 is that PE layer is the sectional view of rectangular heat-sealing composite barrier film.
Fig. 2 is that PE layer is the sectional view of the heat-sealing composite barrier film of arcs of recesses.
Fig. 3 is that PE layer is the sectional view of the heat-sealing composite barrier film of groove type.
The specific embodiment
Below in conjunction with specific embodiment, further illustrate the present invention, should understand these embodiment is only not used in and limits the scope of the invention for the present invention is described, after having read the present invention, those skilled in the art all fall within the application's claims to the modification of the various equivalent form of values of the present invention and limit.
Embodiment
With reference to Fig. 2, the heat-sealing composite barrier film that is arcs of recesses with two PE layers is made.
(1) the PET/Al composite membrane that is 800mm by width is placed on film device;
(2) amount of dripping and the speed of the liquid phase P E of zones of different are set;
(3) regulate the translational speed of Obstruct membrane, control the thickness of PE layer between 20 μ m and 100 μ m;
(4) every 8 seconds, the speed of PE film is set to homogeneity value, obtains the PE film band of even thickness;
(5) even film is 2 seconds, forms horizontal dividing strip;
(5) after film, in the place of Obstruct membrane thickness maximum, film is cut out, obtained heat-sealing composite barrier film.
Above are only the single specific embodiment of the present invention, but design concept of the present invention is not limited to this, allly utilizes this design to carry out the change of unsubstantiality to the present invention, all should belong to the behavior of invading the scope of protection of the invention.In every case be the content that does not depart from technical solution of the present invention, any type of simple modification, equivalent variations and the remodeling above embodiment done according to technical spirit of the present invention, still belong to the protection domain of technical solution of the present invention.
Claims (6)
1. a heat-sealing composite barrier film, is composited by pet layer, Al layer, PE layer etc., it is characterized in that PE layer thickness is inhomogeneous, presses the thick intermediate thin of film material lengthwise edge, and is laterally having dividing strip.
2. according to the Obstruct membrane described in claims 1, it is characterized in that described PE laminated be plane, another side cross section is arc or groove type, plane is compound with Al layer inwardly, arc-shaped concave district or groove mouth outwardly, are heat-sealing adhesive linkages.
3. according to the Obstruct membrane described in claims 1, it is characterized in that described PE layer is fireproof N-burning PE.
4. according to the Obstruct membrane described in claims 1, it is characterized in that the thickness of described PE layer changes in certain scope, the thickness of locating PE layer at the thickest edge is 40～100 μ m, and the thickness of the thinnest middle part is 20～40 μ m.
5. according to the Obstruct membrane described in claims 1, it is characterized in that the horizontal street medians width of described PE layer is 20～50mm, thickness is 30～50 μ m, and spacing is 300～500mm.
6. seal a preparation method for composite barrier film, it is characterized in that comprising the step of following order:
(1) PET/Al composite membrane is placed on film device;
(2) amount of dripping and the speed of the liquid phase P E of zones of different are set;
(3) regulate the translational speed of Obstruct membrane, control the thickness of PE layer between 20 μ m and 100 μ m;
(4) every 5-10 second, the speed of PE film is set to homogeneity value, obtains the PE film band of even thickness;
(5) even film 1-3 second, form horizontal dividing strip;
(6) after film, in the place of Obstruct membrane thickness maximum, film is cut out, obtained heat-sealing composite barrier film.
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| CN201210246191.0A CN103538300A (en) | 2012-07-16 | 2012-07-16 | Heat-sealing composite barrier film and preparation method thereof |
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| CN201210246191.0A CN103538300A (en) | 2012-07-16 | 2012-07-16 | Heat-sealing composite barrier film and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3030353A1 (en) * | 2014-12-23 | 2016-06-24 | Saint Gobain Isover | |
| CN107962834A (en) * | 2017-11-17 | 2018-04-27 | 安徽火峰电气有限公司 | A kind of fire-retardant high-barrier composite membrane |
| CN110423570A (en) * | 2019-08-13 | 2019-11-08 | 深圳市台技光电有限公司 | Tempered glass protective film suitable for ultrasonic fingerprint identification function |
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| CN201770125U (en) * | 2010-08-05 | 2011-03-23 | 鼎贞(厦门)实业有限公司 | Electromagnetic induction sealing gasket |
| CN202053617U (en) * | 2011-05-03 | 2011-11-30 | 广东生益科技股份有限公司 | Bonding sheet structure used for improving uniformity of thickness of copper-clad plate |
| CN202192825U (en) * | 2011-06-03 | 2012-04-18 | 夏超华 | Adhesive stopping membrane for hot-pressing technology of flexible printed circuit board |
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2012
- 2012-07-16 CN CN201210246191.0A patent/CN103538300A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201770125U (en) * | 2010-08-05 | 2011-03-23 | 鼎贞(厦门)实业有限公司 | Electromagnetic induction sealing gasket |
| CN202053617U (en) * | 2011-05-03 | 2011-11-30 | 广东生益科技股份有限公司 | Bonding sheet structure used for improving uniformity of thickness of copper-clad plate |
| CN202192825U (en) * | 2011-06-03 | 2012-04-18 | 夏超华 | Adhesive stopping membrane for hot-pressing technology of flexible printed circuit board |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3030353A1 (en) * | 2014-12-23 | 2016-06-24 | Saint Gobain Isover | |
| WO2016102811A1 (en) * | 2014-12-23 | 2016-06-30 | Saint-Gobain Isover | Vacuum insulation panel having an improved seal |
| JP2018502259A (en) * | 2014-12-23 | 2018-01-25 | サン−ゴバン イゾベール | Vacuum insulation panel with improved sealing joint |
| CN107962834A (en) * | 2017-11-17 | 2018-04-27 | 安徽火峰电气有限公司 | A kind of fire-retardant high-barrier composite membrane |
| CN110423570A (en) * | 2019-08-13 | 2019-11-08 | 深圳市台技光电有限公司 | Tempered glass protective film suitable for ultrasonic fingerprint identification function |
| CN110423570B (en) * | 2019-08-13 | 2024-05-14 | 深圳市台技光电有限公司 | Toughened glass protection film suitable for ultrasonic fingerprint identification function |
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Address after: Taicang City, Yan Shan Xi Lu Suzhou 215400 Jiangsu province No. 136 Applicant after: SUZHOU V.I.P. NEW MATERIAL CO., LTD. Address before: 215400 Taicang city of Jiangsu Province Yanshan Mountain Road No. 136 grand Fangyuan Industrial Park Applicant before: Suzhou V.I.P. New Material Co., Ltd. |
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Application publication date: 20140129 |