CN108481815B - A kind of hot sealing process obstructing co-extrusion film vacuum bag - Google Patents
A kind of hot sealing process obstructing co-extrusion film vacuum bag Download PDFInfo
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- CN108481815B CN108481815B CN201810285014.0A CN201810285014A CN108481815B CN 108481815 B CN108481815 B CN 108481815B CN 201810285014 A CN201810285014 A CN 201810285014A CN 108481815 B CN108481815 B CN 108481815B
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- knife
- extrusion film
- hot sealing
- heat
- hot
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- 238000001125 extrusion Methods 0.000 title claims abstract description 40
- 238000007789 sealing Methods 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 35
- 230000008569 process Effects 0.000 title claims abstract description 30
- 238000002525 ultrasonication Methods 0.000 claims abstract description 18
- 238000009835 boiling Methods 0.000 claims abstract description 17
- 206010053615 Thermal burn Diseases 0.000 claims abstract description 12
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000005520 cutting process Methods 0.000 claims abstract description 5
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 14
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 14
- 230000004888 barrier function Effects 0.000 claims description 9
- -1 polytetrafluoroethylene Polymers 0.000 claims description 8
- 239000004744 fabric Substances 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 2
- 239000010931 gold Substances 0.000 claims description 2
- 229910052737 gold Inorganic materials 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 20
- 239000004698 Polyethylene Substances 0.000 description 12
- 239000003795 chemical substances by application Substances 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 6
- 239000002344 surface layer Substances 0.000 description 4
- 229920000219 Ethylene vinyl alcohol Polymers 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- UFRKOOWSQGXVKV-UHFFFAOYSA-N ethene;ethenol Chemical compound C=C.OC=C UFRKOOWSQGXVKV-UHFFFAOYSA-N 0.000 description 2
- 239000004715 ethylene vinyl alcohol Substances 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000009210 therapy by ultrasound Methods 0.000 description 2
- 238000002604 ultrasonography Methods 0.000 description 2
- AFCARXCZXQIEQB-UHFFFAOYSA-N N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CCNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 AFCARXCZXQIEQB-UHFFFAOYSA-N 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 description 1
- UAUDZVJPLUQNMU-KTKRTIGZSA-N erucamide Chemical compound CCCCCCCC\C=C/CCCCCCCCCCCC(N)=O UAUDZVJPLUQNMU-KTKRTIGZSA-N 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000012793 heat-sealing layer Substances 0.000 description 1
- 230000010534 mechanism of action Effects 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- GTDHYNXLIKNVTJ-UHFFFAOYSA-N n-(1-hydroxy-2-methylpropan-2-yl)octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(=O)NC(C)(C)CO GTDHYNXLIKNVTJ-UHFFFAOYSA-N 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- FATBGEAMYMYZAF-KTKRTIGZSA-N oleamide Chemical compound CCCCCCCC\C=C/CCCCCCCC(N)=O FATBGEAMYMYZAF-KTKRTIGZSA-N 0.000 description 1
- FATBGEAMYMYZAF-UHFFFAOYSA-N oleicacidamide-heptaglycolether Natural products CCCCCCCCC=CCCCCCCCC(N)=O FATBGEAMYMYZAF-UHFFFAOYSA-N 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B70/00—Making flexible containers, e.g. envelopes or bags
- B31B70/60—Uniting opposed surfaces or edges; Taping
- B31B70/64—Uniting opposed surfaces or edges; Taping by applying heat or pressure
Landscapes
- Lining Or Joining Of Plastics Or The Like (AREA)
- Package Closures (AREA)
Abstract
The invention discloses a kind of hot sealing process for obstructing co-extrusion film vacuum bag, including two layers of co-extrusion film hot sealing layer overlapping, the boiling hot heat seal of knife weight, dicing process；Scalding between the heat seal of knife weight and cutting also includes ultrasonication process, ultrasonication process are as follows: the ultrasonic transducer below pedestal is ultrasonically treated the heat-sealable area being located between boiling hot knife and pedestal；It is 0.12~0.14Mpa to the pressure of film that knife is scalded when ultrasonication, and ultrasonic time is 0.5~2s, and the frequency of ultrasonic wave is 19.5~21.5kHz, scalds the softening point temperature that knife temperature is not higher than co-extrusion film hot sealing layer.The hot sealing process that the present invention obstructs co-extrusion film vacuum bag utilizes the vibration of ultrasonic wave, so that the small hole stress for being located at heat-sealing edges of regions is unstable, finally escapes micro-air therein.The small number of cavities in heat-sealing region after treatment is reduced, and heat seal strength increases.
Description
Technical field
The invention belongs to vacuum bag technique fields, and in particular to a kind of hot sealing process for obstructing co-extrusion film vacuum bag.
Background technique
Multi-layer co-extruded composite membrane mostly uses five layers of symmetrical structure of ABCBA and seven layers etc. using PA or EVOH as barrier layer, PE,
PP is heat-sealing surface layer.Hot sealing process process in the prior art are as follows: by the opposite overlapping in the heat-sealing surface layer of two layers of co-extrusion film, will seal
Boiling hot knife is heated to predetermined temperature, seals boiling hot knife across co-extrusion film of the high-temperature-resistant cloth to overlapping and applies pressure and pressure maintaining for a period of time,
It is promoted after sealing boiling hot knife, heat-sealable area is cooled to room temperature into cutting process.
Co-extrusion film before overlapping is in winding state, in order to guarantee good processing performance, such as on packing machine walks machine
Performance must have lower coefficient of friction between co-extrusion film layer, and corresponding solution is added slipping agent and/or is opened in co-extrusion film
Mouth agent, above-mentioned slipping agent are generally added in the middle layer of co-extrusion film, and opening agent is typically incorporated within the heat-sealing surface layer of co-extrusion film.Co-extrusion film is quiet
It sets in maturing process, slipping agent is from middle layer to surface migration.Organic slipping agent generally include oleamide, erucyl amide and
Stearmide.Opening agent is usually talcum powder, silica, glass microballoon etc..The mechanism of action of opening agent is prominent in film
Surface influences the mirrored effect of film surface, so that film is easier to separate.Since slipping agent and opening agent are in heat-sealing temperature
It is not melt substance under degree, is gathered in heat-sealing region, will cause small hole, or comprising micro-air, these positions will be first
It is initially formed weakness zone, influences the heat sealability of film.
Summary of the invention
It is an object of the invention to overcome defect existing in the prior art, a kind of heat for obstructing co-extrusion film vacuum bag is provided
Envelope technique, the hole in the vacuum bag heat-sealable area after being ultrasonically treated, which is measured, is reduced, and heat sealability improves.
To achieve the above object, the technical solution of the present invention is as follows: it is a kind of obstruct co-extrusion film vacuum bag hot sealing process, including
Two layers of co-extrusion film hot sealing layer overlapping scalds the heat seal of knife weight, dicing process；It is characterized in that, scalding between the heat seal of knife weight and cutting
Also include ultrasonication process, ultrasonication process are as follows: ultrasonic transducer below pedestal to be located in boiling hot knife and
Heat-sealable area ultrasonic treatment between pedestal；It is 0.12~0.14Mpa, ultrasonic time to the pressure of film that knife is scalded when ultrasonication
For 0.5~2s, the frequency of ultrasonic wave is 19.5~21.5kHz, scalds the softening point temperature that knife temperature is not higher than co-extrusion film hot sealing layer.
Via the softening point temperature for without apparent gap, being co-extrusion film hot sealing layer between the film of boiling hot knife weight heat seal and
Under the pressure of slightly above one atmospheric pressure, the partial holes positioned at heat-sealing area edge are extruded by ultrasonic activation, seal region
Middle hole amount is reduced, and heat seal strength increases.
Preferred technical solution is that the softening point temperature of co-extrusion film hot sealing layer is N DEG C, and the temperature for scalding knife is N-5~N DEG C.
Interface friction between apparent film is not present in hot wind region by scalding the heat seal of knife weight, scalds knife to heat-sealing region
Pressure is much smaller than the static pressure of ultrasonic bonding, but the friction between film and pedestal is so that the actual temperature in heat-sealing region is bigger
In boiling hot knife temperature, the softening of heat-sealing layer material and the discharge of hole micro-air are peomoted.Temperature is excessively high, will lead to heat
The decline of sealing material viscosity is too fast, and ultrasonic vibration can form negative pressure by many small regional areas in polymer melt, leads
Number of cavities is caused to increase, downward trend can be presented in heat seal strength, and also results in being thinned for heat-sealable area domain.
In order to reduce ultrasonic vibration for the strong influence between heat-sealable area and adjacent co-extrusion film, preferred technical solution
For the amplitude of ultrasonic wave is 10~20 μm, and the thickness of co-extrusion film is not less than 100 μm.
Preferred technical solution is to scald to be provided with polytetrafluoroethylene (PTFE) high temperature cloth between knife and heat-sealable area, and polytetrafluoroethylene (PTFE) is high
Stupe is fixedly connected with boiling hot knife.The effect of polytetrafluoroethylene (PTFE) high temperature cloth is not only in that such as PA layers of co-extrusion film surface layer of protection, also exists
In reducing the coefficient of friction between film and boiling hot knife, the fuel factor of ultrasonic wave is reduced.
In order to guarantee that ultrasonic wave good spread speed in the base, preferred technical solution are that the material of pedestal is gold
Belong to.
Preferred technical solution is that the heat-sealable area after ultrasonication is cut after natural cooling.
The advantages and beneficial effects of the present invention are:
The hot sealing process that the present invention obstructs co-extrusion film vacuum bag utilizes the vibration of ultrasonic wave, so that being located at heat-sealing edges of regions
Small hole stress it is unstable, finally micro-air therein is escaped.The small hole number in heat-sealing region after treatment
Amount is reduced, and heat seal strength increases.
Specific embodiment
With reference to embodiment, the specific embodiment of the present invention is further described.Following embodiment is only used for more
Add and clearly demonstrate technical solution of the present invention, and not intended to limit the protection scope of the present invention.
Embodiment 1-3
For the film thickness that embodiment 1-3 is used for 150 μm, membrane structure is seven layers of PA/TIE/PE/TIE/PA/TIE/PE
Asymmetric middle barrier co-extrusion film, the softening point temperature of co-extrusion film hot sealing layer PE are 130 DEG C, 5 parts of parallel sample.
Embodiment 1
The hot sealing process of the barrier co-extrusion film vacuum bag of embodiment 1, including two layers of co-extrusion film hot sealing layer overlapping, boiling hot knife weight
Heat seal, dicing process；Scalding between the heat seal of knife weight and cutting also includes ultrasonication process, scalds knife weight process and scalds knife temperature
150 DEG C of degree, pressure maintaining 0.4Mpa3s；
Ultrasonication process are as follows: the ultrasonic transducer below pedestal is to the heat-sealable area being located between boiling hot knife and pedestal
Ultrasonic treatment；It is 0.12Mpa to the pressure of film that knife is scalded when ultrasonication, and the frequency of ultrasonic time 0.5s, ultrasonic wave are
19.5kHz, the amplitude of ultrasonic wave are 20 μm, scald 120 DEG C of knife temperature.
Embodiment 2
Embodiment 2 the difference from embodiment 1 is that, it is 0.14Mpa, ultrasound to the pressure of film that knife is scalded when ultrasonication
Time is 2s, and the amplitude of ultrasonic wave is 25 μm, and the temperature for scalding knife is 125 DEG C.
Embodiment 3
Embodiment 3 the difference from embodiment 1 is that, it is 0.13Mpa, ultrasound to the pressure of film that knife is scalded when ultrasonication
Time is 1s, and the temperature for scalding knife is 130 DEG C.
It scalds and is provided with polytetrafluoroethylene (PTFE) high temperature cloth between knife and heat-sealable area, polytetrafluoroethylene (PTFE) high temperature cloth and the fixed company of boiling hot knife
It connects.The material of pedestal is stainless steel.
It is cut after natural cooling heat-sealable area after ultrasonication.
Comparative example
Comparative example 1 is identical as the boiling hot knife weight heat seal process of embodiment 1, scalds the vacuum bag of knife weight heat seal through natural cooling
It directly cuts afterwards.
Comparative example 2 the difference from embodiment 1 is that, 140 DEG C of knife temperature is scalded when ultrasonication.
The interior heat seal strength detection method of sample: detecting bottom heat seal strength referring to the method in QB/T2358, takes 5 parallel examinations
The average value of sample.
The turnup height measured value of embodiment 1-3 and comparative example 1-2 see the table below:
| Bottom heat seal strength (N/15mm) | |
| Embodiment 1 | 21.21 |
| Embodiment 2 | 23.88 |
| Embodiment 3 | 24.57 |
| Comparative example 1 | 19.84 |
| Comparative example 2 | 12.17 |
Using PA/TIE/PE/PE/PE/TIE/PA/TIE/PE, PA/TIE/ PE/TIE/PA/EVOH/PA/TIE/PE and
Middle barrier, the eleventh floor co-extrusion film conduct of high-barrier post-process sample, and wherein PA is nylon layer, PE is polyethylene layer, TIE is glue
Adhesion coating, obtained experimental result variation tendency reach unanimity with embodiment 1-3.
It is only the preferred embodiment of the present invention described in upper, it is noted that for those skilled in the art
For, without departing from the technical principles of the invention, several improvements and modifications can also be made, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (6)
1. a kind of hot sealing process for obstructing co-extrusion film vacuum bag, including two layers of co-extrusion film hot sealing layer overlapping, the boiling hot hot splitting or integrating of knife weight
Cut step；It is characterized in that, scalding between the heat seal of knife weight and cutting also includes ultrasonication process, ultrasonication process
Are as follows: the ultrasonic transducer below pedestal is ultrasonically treated the heat-sealable area being located between boiling hot knife and pedestal；When ultrasonication
Scalding knife is 0.12~0.14Mpa to the pressure of film, and ultrasonic time is 0.5~2s, the frequency of ultrasonic wave is 19.5~
21.5kHz scalds the softening point temperature that knife temperature is not higher than co-extrusion film hot sealing layer.
2. the hot sealing process of barrier co-extrusion film vacuum bag according to claim 1, which is characterized in that co-extrusion film hot sealing layer
Softening point temperature is N DEG C, and the temperature for scalding knife is N-5~N DEG C.
3. the hot sealing process of barrier co-extrusion film vacuum bag according to claim 2, which is characterized in that the amplitude of ultrasonic wave is
20~25 μm, the thickness of co-extrusion film is not less than 100 μm.
4. the hot sealing process of barrier co-extrusion film vacuum bag according to claim 3, which is characterized in that scald knife and heat-sealable area it
Between be provided with polytetrafluoroethylene (PTFE) high temperature cloth, polytetrafluoroethylene (PTFE) high temperature cloth is fixedly connected with boiling hot knife.
5. the hot sealing process of barrier co-extrusion film vacuum bag according to claim 3, which is characterized in that the material of pedestal is gold
Belong to.
6. the hot sealing process of barrier co-extrusion film vacuum bag according to claim 1, which is characterized in that after ultrasonication
It is cut after natural cooling heat-sealable area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810285014.0A CN108481815B (en) | 2018-04-02 | 2018-04-02 | A kind of hot sealing process obstructing co-extrusion film vacuum bag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810285014.0A CN108481815B (en) | 2018-04-02 | 2018-04-02 | A kind of hot sealing process obstructing co-extrusion film vacuum bag |
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| Publication Number | Publication Date |
|---|---|
| CN108481815A CN108481815A (en) | 2018-09-04 |
| CN108481815B true CN108481815B (en) | 2019-04-30 |
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| CN201810285014.0A Active CN108481815B (en) | 2018-04-02 | 2018-04-02 | A kind of hot sealing process obstructing co-extrusion film vacuum bag |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109703036A (en) * | 2018-12-19 | 2019-05-03 | 常州信泰包装有限公司 | A kind of environment-protection internal lining heat-sealing processing technology |
| CN113086392B (en) * | 2021-03-26 | 2022-09-06 | 上海唐科新材料科技有限公司 | Anti-seismic buffer gas column bag, gas column film and gas column bag processing technology |
| CN114161791A (en) * | 2021-11-03 | 2022-03-11 | 苏州宏昌包装材料有限公司 | High-air-tightness composite packaging material and preparation method thereof |
| CN113980439A (en) * | 2021-11-16 | 2022-01-28 | 苏州宏昌包装材料有限公司 | High-strength composite packaging material and preparation method thereof |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2587935B1 (en) * | 1985-09-30 | 1990-11-09 | Cantenot Francois | PROCESS FOR THE MANUFACTURE OF BELLOWS BAGS FROM A COMPLEX FILM CONSISTING OF TWO ELEMENTARY FILMS OF DIFFERENT PLASTIC MATERIALS JOINED BY APPLYING ULTRA-SOUNDS |
| ES2812538T3 (en) * | 2010-11-11 | 2021-03-17 | Danapak Flexibles As | A laminate for use in packaging, a method of making and use of a reclosable laminate |
| CN202088524U (en) * | 2011-03-15 | 2011-12-28 | 骏龙包装集团有限公司 | A preheating apparatus for a European style bag edge ironing process |
| CN102514230B (en) * | 2011-12-23 | 2014-06-18 | 梁昌福 | Production method for vacuum freshness protection package and equipment for same |
| CN203580230U (en) * | 2013-09-12 | 2014-05-07 | 杭州古松包装科技有限公司 | Composite processing device for PEPA co-extruded film bag |
| CN204222300U (en) * | 2014-11-14 | 2015-03-25 | 佛山双鹤药业有限责任公司 | Multi-layer co-extruded large capacity transfusion bag joint encapsulation preheating device |
| JP6688666B2 (en) * | 2016-04-15 | 2020-04-28 | 株式会社細川洋行 | Gazette bag and method of manufacturing gazette bag |
| CN206968087U (en) * | 2017-05-10 | 2018-02-06 | 苏州天加新材料科技有限公司 | A kind of drying-type seals cold cutting system |
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